US4042780A — Multiple message frame adaptor apparatus for loop…

Claim 1

Independent Claim 522 words

In a loop communication system having a controller station having a controller output means adapted to generate time spaced multiple bit message frames and having a controller input means adapted to receive said message frames, a plurality of remote stations, a first transmission trunk line for connecting said controller means and said remote stations in a series conducting loop including a first remote station and a second remote station, a second tramsission trunk line for producing a parallel conducting branch in said loop, a message converting adaptor apparatus for connecting the first and second transmission line in said loop comprising a first converting means having a single message frame input and a pair of signal transmitting means each one connected to one of a pair of message frame outputs, a signal logic means connected to said input and said outputs and transmitting said message frame from said frame input to both of said transmitting means and thereby producing the same message frame on said outputs as the message frame received at said frame input, means for connecting of the first trunk line to said frame message inputs and to one of said pair of message frame outputs, means for connecting of the second trunk line to the second of said pair of message frame outputs and thereby providing duplicate transmission of said message frames from said one message frame input, a second converting means having a pair of message frame inputs and a single message frame output, a message frame transmitting means connected to said single message frame output, a selector means connected to said pair of message frame inputs and directly transmitting each bit of the message frame from one of said inputs, means for connecting the first trunk line to one of said pair of message frame inputs and to said single message frame output and connecting the second trunk line to the second of said message frame inputs, and one of said stations including means for connecting the first trunk line to a first of said pair of outputs of said first converting means to a first of said pair of inputs of said second converting means and connecting the second of said pair of outputs of said first converting means to the second of said pair of inputs of said second converting means and thereby provide a simultaneous flow of said message frame in the same direction relative to said controller means and said remote stations, and wherein said signal logic means of said first converting section includes a receiver connected to said inputs, a pair of transmitters connected to said outputs, said transmitters having signal input means for receiving the bit signals and a strobe means for activating the transmitters, a bit transmitting means connected between said receivers and both of said transmitters, a disable timing means connected to said receiver and operable to disable and receiver, and a delay timing means connected to said receiver and activated thereby, and establishing an output after a predetermined period, said delay timing means being connected to said strobe means and to said disable timing means for simultaneous operation thereof.

Claim 2

Dependent Claim 522 words

In a loop communication system having a controller station having a controller output means adapted to generate time spaced multiple bit message frames and having a controller input means adapted to receive said message frames, a plurality of remote stations, a first transmission trunk line for connecting said controller means and said remote stations in a series conducting loop including a first remote station and a second remote station, a second tramsission trunk line for producing a parallel conducting branch in said loop, a message converting adaptor apparatus for connecting the first and second transmission line in said loop comprising a first converting means having a single message frame input and a pair of signal transmitting means each one connected to one of a pair of message frame outputs, a signal logic means connected to said input and said outputs and transmitting said message frame from said frame input to both of said transmitting means and thereby producing the same message frame on said outputs as the message frame received at said frame input, means for connecting of the first trunk line to said frame message inputs and to one of said pair of message frame outputs, means for connecting of the second trunk line to the second of said pair of message frame outputs and thereby providing duplicate transmission of said message frames from said one message frame input, a second converting means having a pair of message frame inputs and a single message frame output, a message frame transmitting means connected to said single message frame output, a selector means connected to said pair of message frame inputs and directly transmitting each bit of the message frame from one of said inputs, means for connecting the first trunk line to one of said pair of message frame inputs and to said single message frame output and connecting the second trunk line to the second of said message frame inputs, and one of said stations including means for connecting the first trunk line to a first of said pair of outputs of said first converting means to a first of said pair of inputs of said second converting means and connecting the second of said pair of outputs of said first converting means to the second of said pair of inputs of said second converting means and thereby provide a simultaneous flow of said message frame in the same direction relative to said controller means and said remote stations, and wherein said signal logic means of said first converting section includes a receiver connected to said inputs, a pair of transmitters connected to said outputs, said transmitters having signal input means for receiving the bit signals and a strobe means for activating the transmitters, a bit transmitting means connected between said receivers and both of said transmitters, a disable timing means connected to said receiver and operable to disable and receiver, and a delay timing means connected to said receiver and activated thereby, and establishing an output after a predetermined period, said delay timing means being connected to said strobe means and to said disable timing means for simultaneous operation thereof.

Claim 3

Dependent Claim 100 words

In the loop communication system of claim 1 wherein an isolating transformer is connected between said receiver and said input means, said bit transmitting means including a logic level sensor and transmitting setting circuit connected between said receiver and both of said transmitters, said transmitters having interconnected strobe means for simultaneous actuation of said transmitters, a receiver disable timing means connected to said receiver and operable to disable said receiver, and a delay timing means connected to said receiver and activated thereby, said delay timing means being connected to strobe means and to disable timing means for simultaneous operation thereof.

Claim 4

Dependent Claim 507 words

In a loop communication system having a controller station having a controller output means adapted to generate time spaced multiple bit message frames and having a controller input means adapted to receive said message frames, a plurality of remote stations, a first transmission trunk line for connecting said controller means and said remote stations in a series conducting loop including a first remote station and a second remote station, a second transmission trunk line for producing a parallel conducting branch in said loop, a message converting adaptor apparatus for connecting the first and second transmission line in said loop comprising a first converting means having a single message frame input and a pair of signal transmitting means each one connected to one of a pair of message frame outputs, a signal logic means connected to said input and said outputs and transmitting said message frame from said frame input to both of said transmitting means and thereby producing the same message frame on said outputs as the message frame received at said frame input, means for connecting of the first trunk line to said frame message inputs and to one of said pair of message frame outputs, means for connecting of the second trunk line to the second of said pair of message frame outputs and thereby providing duplicate transmission of said message frames from said one message frame input, a second converting means having a pair of message frame inputs and a single message frame output, a message frame transmitting means connected to said single message frame output, a selector means connected to said pair of message frame inputs and directly transmitting each bit of the message frame from one of said inputs, means for connecting the first trunk line to one of said pair of message frame inputs and to said single message frame output and connecting the second trunk line to the second of said message frame inputs, and one of said stations including means for connecting the first trunk line to a first of said pair of outputs of said first converting means to a first of said pair of inputs of said second converting means and connecting the second of said pair of outputs of said first converting means to the second of said pair of inputs of said second converting means and thereby provide a simultaneous flow of said message frame in the same direction relative to said controller means and said remote stations, and wherein said signal selector means of said second converting section includes a first throughput switch means connected to the first input means and the output means and a second throughput switch means connected between the second input means and the output means, a comparator means connected to said input means and establishing a pair of logic outputs providing a coded signal related to the receipt of signals at said input means, said comparator network being connected to selectively actuate the throughput switches to selectively activate a single throughput switch for direct transmission of said message frames.

Claim 5

Dependent Claim 507 words

In a loop communication system having a controller station having a controller output means adapted to generate time spaced multiple bit message frames and having a controller input means adapted to receive said message frames, a plurality of remote stations, a first transmission trunk line for connecting said controller means and said remote stations in a series conducting loop including a first remote station and a second remote station, a second transmission trunk line for producing a parallel conducting branch in said loop, a message converting adaptor apparatus for connecting the first and second transmission line in said loop comprising a first converting means having a single message frame input and a pair of signal transmitting means each one connected to one of a pair of message frame outputs, a signal logic means connected to said input and said outputs and transmitting said message frame from said frame input to both of said transmitting means and thereby producing the same message frame on said outputs as the message frame received at said frame input, means for connecting of the first trunk line to said frame message inputs and to one of said pair of message frame outputs, means for connecting of the second trunk line to the second of said pair of message frame outputs and thereby providing duplicate transmission of said message frames from said one message frame input, a second converting means having a pair of message frame inputs and a single message frame output, a message frame transmitting means connected to said single message frame output, a selector means connected to said pair of message frame inputs and directly transmitting each bit of the message frame from one of said inputs, means for connecting the first trunk line to one of said pair of message frame inputs and to said single message frame output and connecting the second trunk line to the second of said message frame inputs, and one of said stations including means for connecting the first trunk line to a first of said pair of outputs of said first converting means to a first of said pair of inputs of said second converting means and connecting the second of said pair of outputs of said first converting means to the second of said pair of inputs of said second converting means and thereby provide a simultaneous flow of said message frame in the same direction relative to said controller means and said remote stations, and wherein said signal selector means of said second converting section includes a first throughput switch means connected to the first input means and the output means and a second throughput switch means connected between the second input means and the output means, a comparator means connected to said input means and establishing a pair of logic outputs providing a coded signal related to the receipt of signals at said input means, said comparator network being connected to selectively actuate the throughput switches to selectively activate a single throughput switch for direct transmission of said message frames.

Claim 6

Dependent Claim 79 words

In the loop communication system of claim 3 wherein said comparator means is constructed to activate the first throughput switch means in response to a message bit at the first input means and in response to the absence of the message bit at the first and second input means, and activating the second throughput switch means in response to a message bit at the second input means and the absence of a message bit at the first input means.

Claim 7

Dependent Claim 141 words

In the loop communication system of claim 3 wherein said comparator means includes individual sensor means connected to said input means and establishing a pair of opposite level logic signals, said first throughput switch means including a first logic gate means having inputs connected to said first input means and to the sensor means to activate the first throughput switch means in response to a message bit at the first input means and in response to the absence of the message bit at the first and second input means, said second throughput switch means including logic gate means having inputs connected to said second input means and to said sensor means to activate the second throughput switch means in response to a message bit at the second input means and the absence of a message bit at the first input means.

Claim 8

Dependent Claim 63 words

In the loop communication system of claim 5 including a pair of logic gate means defining a pair of enabling output means connected one each to said throughput switch means, said gate means having a first input means connected to the one output of the first sensor means and having second input means connected to the opposite outputs of the second sensor means.

Claim 9

Dependent Claim 520 words

In a loop communication system having a controller station having a controller output means adapted to generate time spaced multiple bit message frames and having a controller input means adapted to receive said message frames, a plurality of remote stations, a first transmission trunk line for connecting said controller means and said remote stations in a series conducting loop including a first remote station and a second remote station, a second transmission trunk line for producing a parallel conducting branch in said loop, a message converting adaptor apparatus for connecting the first and second transmission line in said loop comprising a first converting means having a single message frame input and a pair of signal transmitting means each one connected to one of a pair of message frame outputs, a signal logic means connected to said input and said outputs and transmitting said message frame from said frame input to both of said transmitting means and thereby producing the same message frame on said outputs as the message frame received at said frame input, means for connecting of the first trunk line to said message inputs and to one of said pair of message frame outputs, means for connecting of the second trunk line to the second of said pair of message frame outputs and thereby providing duplicate transmission of said message frames from said one message frame input, a second converting means having a pair of message frame inputs and a single message frame output, a message frame transmitting means connected to said single message frame output, a selector means connected to said pair of message frame inputs and directly transmitting each bit of the message frame from one of said inputs, means for connecting the first trunk line to one of said pair of message frame inputs and to said single message frame output and connecting the second trunk line to the second of said message frame inputs, and one of said stations including means for connecting the first trunk line to a first of said pair of outputs of said first converting means to a first of said pair of inputs of said second converting means and connecting the second of said pair of outputs of said first converting means to the second of said pair of inputs of said second converting means and thereby provide a simultaneous flow of said message frame in the same direction relative to said controller means and said remote stations, and wherein said signal logic means of the first converting means includes a logic level sensing means connected to said single input means and a timing means connected to said single input means, and a pair of identical transmitting means for transmitting of bit signals and each having a pair of inputs a first of which is connected to the sensing means and a second of which is connected to the timing means, and timing means being activated by each message bit and generating a signal a predetermined period thereafter to delay activation of the transmitting means, said transmitting means being connected to the output means of said first converting section.

Claim 10

Dependent Claim 520 words

In a loop communication system having a controller station having a controller output means adapted to generate time spaced multiple bit message frames and having a controller input means adapted to receive said message frames, a plurality of remote stations, a first transmission trunk line for connecting said controller means and said remote stations in a series conducting loop including a first remote station and a second remote station, a second transmission trunk line for producing a parallel conducting branch in said loop, a message converting adaptor apparatus for connecting the first and second transmission line in said loop comprising a first converting means having a single message frame input and a pair of signal transmitting means each one connected to one of a pair of message frame outputs, a signal logic means connected to said input and said outputs and transmitting said message frame from said frame input to both of said transmitting means and thereby producing the same message frame on said outputs as the message frame received at said frame input, means for connecting of the first trunk line to said message inputs and to one of said pair of message frame outputs, means for connecting of the second trunk line to the second of said pair of message frame outputs and thereby providing duplicate transmission of said message frames from said one message frame input, a second converting means having a pair of message frame inputs and a single message frame output, a message frame transmitting means connected to said single message frame output, a selector means connected to said pair of message frame inputs and directly transmitting each bit of the message frame from one of said inputs, means for connecting the first trunk line to one of said pair of message frame inputs and to said single message frame output and connecting the second trunk line to the second of said message frame inputs, and one of said stations including means for connecting the first trunk line to a first of said pair of outputs of said first converting means to a first of said pair of inputs of said second converting means and connecting the second of said pair of outputs of said first converting means to the second of said pair of inputs of said second converting means and thereby provide a simultaneous flow of said message frame in the same direction relative to said controller means and said remote stations, and wherein said signal logic means of the first converting means includes a logic level sensing means connected to said single input means and a timing means connected to said single input means, and a pair of identical transmitting means for transmitting of bit signals and each having a pair of inputs a first of which is connected to the sensing means and a second of which is connected to the timing means, and timing means being activated by each message bit and generating a signal a predetermined period thereafter to delay activation of the transmitting means, said transmitting means being connected to the output means of said first converting section.

Claim 11

Dependent Claim 78 words

In the loop communication system of claim 7 wherein said signal processing and logic means of the second converting means includes a selector unit having a pair of inputs connected to the input means and a pair of monitor means connected to the input means, and said monitor means responding to the signals at the input means to generate a binary code to the selector unit to transmit the message frame from only one of the input means.

Claim 12

Dependent Claim 86 words

In the loop communication system of claim 8 including a logic level sensing means connected to the output of the selector unit and a timing means connected to the output of the selector unit, said timing means establishing a time delay, and a single transmitting means having a pair of inputs a first of which is connected to said sensing means and a second of which is connected to said timing means to transmit a message bit after the predetermined time established by said timing means.

Claim 13

Dependent Claim 62 words

In the loop communication system of claim 7 wherein said signal logic means includes only circuit elements wholly powered by the signal bits of the incoming message frame and said converting sections having an operating period significantly less than the total period each message bit to establish a corresponding time delay and an essentially transparent signal coupling to the loop controller means.

Claim 14

Dependent Claim 124 words

In the loop communication system of claim 7 wherein said signal logic means of said second converting section includes a selector unit having a comparator means responsive to receipt of the message frames at the input means to establish a selection code, said selector unit having throughput logic switch means connected to and actuated by said comparator means, logic means to transmit the message from either of said throughput logic switch means, a transmitting means, a logic level sensor connected between the last named logic means and the transmitting means to set the transmitting means, and a timing means connected between the last named logic means and the transmitting means and establishing a timed delay activation of the transmitting means to remove transient-type signals.

Claim 15

Dependent Claim 35 words

In the loop communication system of claim 11 wherein said input means includes receiver amplifiers, said timing means including a disable timer means connected to said receiver amplifier and operable to disable said receiver amplifiers.

Claim 16

Dependent Claim 42 words

In the loop communication system of claim 12 wherein said timing means includes a delay timer means connected between said selector unit and said disable timer and said transmitting means to momentarily delay operation of said disable timer and said transmitting means.

Claim 17

Dependent Claim 350 words

In the loop communication system of claim 7 wherein a pair of output lines connected to said transmitting means, a by-pass switch connected between said input to the receiver and one of said pair of output lines and operable to directly connect the input to said output line, said signal processing and logic means of the second converting section having first and second receivers connected to the pair of input means to receive and transmit the message bit signals, a selector unit connected to said receivers to receive both message bit signals and having a single selected output, first and second monitors connected to the first and second receivers and establishing related opposite binary logic signals in accordance with the presence and absence of message bit signals, said selector unit having a decoding means connected to said monitors and operable to select one of said receivers for transmission of the message bit signal, a logic level sensor connected to said selector unit and establishing an output in response to a message bit signal from said selector unit, a delay timing means connected to said selector unit and establishing an output a predetermined time after receipt of a message bit signal, a single transmitter having a signal input connected to said selector unit and a control input connected to said timing means, a single output line connected to said transmitter, a by-pass switch connected between said output to the single transmitter and one of said pair of input lines to the pair of receivers and operable to directly connect one of the inputs to said single output line, and operating means to actuate said switch means, said operating means includes a power sensing means connected to monitor the power supply to the adaptor and responsive to a power failure to actuate said first and second by-pass switches, and each of said timing means includes a disable timing device operated by said output of the timing means and connected to disable said receivers and a strobing timing means operated by said output of the timing means and connected to activate the transmitters.

Claim 18

Dependent Claim 40 words

In the loop communication system of claim 14 wherein each message bit has a corresponding time period and each of said converting sections transmitting the message bit with a total delay of less than essentially one-quarter of said time period.

Claim 19

Dependent Claim 59 words

In the loop communication system of claim 15 wherein said time period is of the order of two microseconds, said delay timing means has a period of the order of 100 nanoseconds, said strobe timing means has a period of the order of 500 nanoseconds and said disable timing means has a period of the order of one microsecond.

Claim 20

Dependent Claim 138 words

In the loop communication system of claim 14 wherein said selector unit includes a first throughput switch means connected between the first input and the output and a second throughput switch means connected between the second input and the output, said throughput switches including logic gate means having inputs connected to the corresponding receiver and having logic control inputs, said monitors being connected to each of said control inputs, each signal monitor including a sensor establishing a pair of opposite level logic signals corresponding to the receipt of a message signal, and a decoding network connected to said sensors and establishing a pair of logic outputs connected to said logic gate means and providing encoded signals related to the receipt of message bit signals to activate one of the logic gate means conjointly with the message bit signal.

Claim 21

Dependent Claim 227 words

Adaptor apparatus for connection to a single input-output ported loop apparatus employing a digital message frame comprising a first converting section having a single message frame input connected to a pair of dual message frame outputs, said first converting section including a signal processing and logic means connected to said frame input for directly converting a single incoming message frame into a pair of identical message frames, and a second converting section having a pair of message frame inputs for simultaneously receiving identical message frames and connected by a pair of first and second circuits to a single message frame output, said second converting section having a signal processing and logic means to selectively transmit simultaneously received individual message frames at said pair of inputs as an identical single message frame at said output, and wherein said first converting section includes a receiver connected to said input, a pair of transmitters connected to said outputs, a logic level sensor and setting circuit connected between said receiver and both said transmitters, and transmitters having interconnected strobe means for simultaneous actuation of said transmitters, a receiver disable timing means connected to said receiver and operable to disable said receiver, and a delay timing means connected to said receiver and activated thereby, said delay timing means being connected to strobe means and to disable timing means for simultaneous operation thereof.

Claim 22

Dependent Claim 227 words

Adaptor apparatus for connection to a single input-output ported loop apparatus employing a digital message frame comprising a first converting section having a single message frame input connected to a pair of dual message frame outputs, said first converting section including a signal processing and logic means connected to said frame input for directly converting a single incoming message frame into a pair of identical message frames, and a second converting section having a pair of message frame inputs for simultaneously receiving identical message frames and connected by a pair of first and second circuits to a single message frame output, said second converting section having a signal processing and logic means to selectively transmit simultaneously received individual message frames at said pair of inputs as an identical single message frame at said output, and wherein said first converting section includes a receiver connected to said input, a pair of transmitters connected to said outputs, a logic level sensor and setting circuit connected between said receiver and both said transmitters, and transmitters having interconnected strobe means for simultaneous actuation of said transmitters, a receiver disable timing means connected to said receiver and operable to disable said receiver, and a delay timing means connected to said receiver and activated thereby, said delay timing means being connected to strobe means and to disable timing means for simultaneous operation thereof.

Claim 23

Dependent Claim 352 words

In a loop communication system having a single controller having a controller output means adapted to generate time spaced multiple bit message frames and having a controller input means adapted to receive said message frames, a plurality of remote stations, a first transmission trunk line for connecting said controller means and said remote stations and establishing transmission of each message frame in a series conducting loop including at least a first remote station and a last remote station, a second transmission trunk line for producing a parallel conducting branch in said loop, a message converting adaptor apparatus for connecting the first and second transmission line in said loop, comprising a first converting means having a single message frame input connection to said controller output means and a pair of signal transmitting means each one connected to one of a pair of message frame outputs, a signal logic means connected to said input and said outputs and transmitting said message frame from said frame input to both of said transmitting means and thereby producing the same message frame on said outputs as the message frame received at said frame input, means for connecting of the first trunk line to one of said pair of message frame outputs, means for connecting of the second trunk line to the second of said pair of message frame outputs and thereby providing duplicate transmission of said message frames from said one message frame input to said first remote stations, a second converting means having a pair of message frame inputs and a single message frame output, a message frame transmitting means connected to said single message frame output, a selector means connected to said pair of message frame inputs and directly transmitting each bit of the message frame from one of said inputs, and said second remote stations including means for connecting the first trunk line to one of said pair of message frame inputs and connecting the second trunk line to the second of said message frame inputs and connecting said first trunk line from said single message frame output means to said controller input means.

Claim 24

Dependent Claim 352 words

In a loop communication system having a single controller having a controller output means adapted to generate time spaced multiple bit message frames and having a controller input means adapted to receive said message frames, a plurality of remote stations, a first transmission trunk line for connecting said controller means and said remote stations and establishing transmission of each message frame in a series conducting loop including at least a first remote station and a last remote station, a second transmission trunk line for producing a parallel conducting branch in said loop, a message converting adaptor apparatus for connecting the first and second transmission line in said loop, comprising a first converting means having a single message frame input connection to said controller output means and a pair of signal transmitting means each one connected to one of a pair of message frame outputs, a signal logic means connected to said input and said outputs and transmitting said message frame from said frame input to both of said transmitting means and thereby producing the same message frame on said outputs as the message frame received at said frame input, means for connecting of the first trunk line to one of said pair of message frame outputs, means for connecting of the second trunk line to the second of said pair of message frame outputs and thereby providing duplicate transmission of said message frames from said one message frame input to said first remote stations, a second converting means having a pair of message frame inputs and a single message frame output, a message frame transmitting means connected to said single message frame output, a selector means connected to said pair of message frame inputs and directly transmitting each bit of the message frame from one of said inputs, and said second remote stations including means for connecting the first trunk line to one of said pair of message frame inputs and connecting the second trunk line to the second of said message frame inputs and connecting said first trunk line from said single message frame output means to said controller input means.

Claim 25

Dependent Claim 96 words

The loop communication system of claim 19 wherein said dual message frame outputs and said dual message frame inputs each includes a primary output and a primary input connected to said first transmission line to transmit and to receive message frames from at least one of said remote stations and establishing normal message transmission and each includes a secondary output and a secondary input connected to each other by said second transmission line and establishing backup message transmission through said at least one of said remote stations in response to failure of said normal message transmission.

Claim 26

Dependent Claim 141 words

The loop communication system of claim 19 wherein said adaptor apparatus includes individual adaptor units between each remote station and said trunk lines and each of said adaptor units having said single message input and said single message frame output connected to said first transmission lines, said adaptor units include selector means whereby said dual message frame outputs and said dual message frame inputs each includes a primary output and a primary input connected to the first transmission line to transmit and to receive message frames from the connected remote station and establishing normal message transmission through the remote station and a secondary output and a secondary input connected to the second transmission lines and thereby each other and establishing backup message transmission through the connected remote station in response to failure of said message transmission on said first transmission line.

Claim 27

Dependent Claim 144 words

The loop communication system of claim 19 wherein said adaptor apparatus has said single message frame input and said single message frame output connected to said transmission lines, said adaptor apparatus includes selector means whereby said dual message frame outputs and said dual message frame inputs each include a primary output and a primary input connected to transmit and to receive message frames from at least one of said remote stations and establishing normal message transmission and a secondary output and a secondary input connected to each other and establishing backup message transmission through said at least one of said remote stations in response to failure of said normal message transmission, and a by-pass means connected to connect said single message frame input and said single message frame output to said primary output and to said primary input to directly transmit said message frames.

Claim 28

Dependent Claim 19 words

The loop communication system of claim 22 wherein said by-pass means responds to a failure within the adaptor apparatus.

Claim 29

Dependent Claim 132 words

The loop communication system of claim 22 including a first loop segment and a second loop segment to be series connected with each other in the trunk means, said adaptor apparatus has said single message frame input and said single message frame output connected to said transmission trunk means, said adaptor apparatus includes selector means whereby said dual message frame outputs and said dual message frame inputs each include a primary output and a primary input connected to said first loop segment and operable to transmit and to receive message frames from said first loop segments and establishing normal message transmission and a secondary output and a secondary input connected to each other and establishing backup message transmission about said first loop segment in response to failure of said normal message transmission.

Claim 30

Dependent Claim 113 words

The loop communication system of claim 24 wherein a second adaptor apparatus has said single message frame input and said single message frame output connected to said transmission trunk means, said second adaptor apparatus includes selector means whereby said dual message frame outputs and said dual message frame inputs each include a primary output and a primary input connected to said second loop segment and operable to transmit and receive message frames from said second loop segment and establishing normal message transmission and a secondary output and a secondary input connected to each other and establishing backup message transmission about said second loop segment in response to failure of said normal message transmission.

Claim 31

Dependent Claim 123 words

The loop communication system of claim 19 including a separate one of said adaptor apparatus for each remote station, each adaptor apparatus having said single message frame input and said single message frame output connected to said transmission trunk means, each adaptor apparatus includes selector means whereby said dual message frame outputs and said dual message frame inputs each include a primary output and a primary input connected to transmit and to receive message frames from the corresponding connected remote station and establishing normal message transmission to and from the remote station and a secondary output and a secondary input connected to each other and establishing backup message transmission about the corresponding remote station in response to failure of said normal message transmission.

Claim 32

Dependent Claim 60 words

The loop communication system of claim 19 wherein a separate adaptor at said first remote stations include means connecting the second trunk line from said first converting means directly to second trunk line of said second converting means at the same remote station for passing of said message frame from either of said trunk lines through said first remote station.

Claim 33

Dependent Claim 357 words

In a loop system having a first controller and a second controller each having a controller output means adapted to generate time spaced multiple bit message frames and having a controller input means adapted to receive said message frames, a plurality of remote stations, a first transmission trunk link adapted to connect said controllers to said remote stations in a series conducting loop, a second transmission trunk line for producing a parallel conducting path in said loop, a message converting adaptor apparatus for connecting the first and second transmission line from said first and second controllers to said remote stations comprising a first converting means having a single message frame input and a pair of signal transmitting means each one connected to one of a pair of message frame outputs, a signal logic means connected to said input and said outputs and transmitting said message frame from the frame input to both of said transmitting means and thereby producing the same message frame on said outputs as the message frame received at said frame input, means for connecting of the first trunk line to one of said pair of message frame outputs and to the input means of said first controller, means for connecting of the second trunk line to the second of said pair of message frame outputs and to the input means of said second controller and thereby providing duplicate transmission of said message frames to said controllers, a second converting means having a pair of message frame inputs and a single message frame output, means connecting the first trunk line from the output means of the first controller to one of said message frame inputs and the second trunk line from the second controller to the other of said message frame inputs, said second converting means including a message frame transmitting means connected to said single message frame output, a selector means connected to said pair of message frame inputs and directly transmitting each bit of the message frame from one of said inputs, means for connecting the input of the first converting means to the message frame output of the second converting means.

Claim 34

Dependent Claim 357 words

In a loop system having a first controller and a second controller each having a controller output means adapted to generate time spaced multiple bit message frames and having a controller input means adapted to receive said message frames, a plurality of remote stations, a first transmission trunk link adapted to connect said controllers to said remote stations in a series conducting loop, a second transmission trunk line for producing a parallel conducting path in said loop, a message converting adaptor apparatus for connecting the first and second transmission line from said first and second controllers to said remote stations comprising a first converting means having a single message frame input and a pair of signal transmitting means each one connected to one of a pair of message frame outputs, a signal logic means connected to said input and said outputs and transmitting said message frame from the frame input to both of said transmitting means and thereby producing the same message frame on said outputs as the message frame received at said frame input, means for connecting of the first trunk line to one of said pair of message frame outputs and to the input means of said first controller, means for connecting of the second trunk line to the second of said pair of message frame outputs and to the input means of said second controller and thereby providing duplicate transmission of said message frames to said controllers, a second converting means having a pair of message frame inputs and a single message frame output, means connecting the first trunk line from the output means of the first controller to one of said message frame inputs and the second trunk line from the second controller to the other of said message frame inputs, said second converting means including a message frame transmitting means connected to said single message frame output, a selector means connected to said pair of message frame inputs and directly transmitting each bit of the message frame from one of said inputs, means for connecting the input of the first converting means to the message frame output of the second converting means.

Claim 35

Dependent Claim 149 words

The loop communication system of claim 28 wherein said plurality of remote stations are connected in series in said first and second lines, said second converting means has its outputs connected to a remote station and its inputs connected to the outputs of the controllers, said single input and single output being interconnected, said first and second lines to the first remote station being connected to said pair of dual message frame outputs, a second adaptor apparatus corresponding in construction to said first named adaptor apparatus, said second adaptor having its single input of its first converting means connected to the single output of its second converting means, said second adaptor having a pair of dual message frame inputs connected to first and second lines from the last remote station and a pair of dual message frame outputs connected to the input means of said first and second controllers.

Claim 36

Dependent Claim 58 words

The loop communication system of claim 28 wherein said trunk lines including a single transmission trunk connected to said single input and said single output, said first and second controllers each having an output connected to said pair of dual message frame inputs and having an input connected one each to said pair of dual message frame outputs.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1980-08-15	1981-02-14	1981-08-16	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1984-08-15	1985-02-14	1985-08-16	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1988-08-15	1989-02-14	1989-08-16	$7700.00	Window Closed / Lapsed

Multiple message frame adaptor apparatus for loop communication system

Abstract

Inventors

Bibliographic Details

Claims Analysis

References Cited (Backward Citations)

USPTO Annuity & Maintenance Windows

Assigned Categories & Tags

Assign Category Tag