Key pulse generator for secrecy signalling circuit

Claim 3

The invention claimed in claim 1 including stepper circuits following said reentry devices and producing respectively different output step values.

Claim 4

The invention claimed in claim 1 including stepper circuits following said reentry devices and producing respectively different output step values, a common reentry device, and means to apply the pulses from all of said steppers to said common reentry device, said latter device having a reentry point which is a multiple value of the reentry point of said first-mentioned reentry devices.

Claim 7

In a pulse generating system, means to produce separate irregular series of two-valued pulses, separate respective circuits therefor, holding devices adapted for connection to certain of said circuits, each holding circuit capable of storing a pulse received from the corresponding circuit, means controlled by pulses in other of said circuits for operatively dissociating a holding device from one of said certain circuits and operatively associating another holding device with said one circuit, and means for combining pulses in a dissociated holding device with pulses in an associated holding device.

Claim 8

In a pulse generating system, means to produce separate irregular series of two-valued pulses, separate respective circuits therefor, holding devices adapted for connection to certain of said circuits, each holding circuit capable of storing a pulse received from the corresponding circuit, means controlled by pulses in other of said circuits for operatively dissociating a holding device from one of said certain circuits and operatively associating another holding device with said one circuit, and means for combining pulses in a dissociated holding device with pulses in an associated holding device.

Claim 9

In a pulse generating system, means for producing irregular pulses in each of a number of separate circuits, an output for each of said circuits, a pair of holding devices for each of said circuits, means for connecting said holding devices one at a time to their respective circuits and means for combining pulses impressed on each of said outputs from said several circuits with other pulses from a corresponding one of said holding devices.

Claim 10

In a pulse generating system, means for producing irregular pulses in each of a number of separate circuits, an output for each of said circuits, a pair of holding devices for each of said circuits, means for connecting said holding devices one at a time to their respective circuits and means for combining pulses impressed on each of said outputs from said several circuits with other pulses from a corresponding one of said holding devices.

Claim 11

In a pulse generating system, separate pulse producing means, separate transmission paths for the pulses produced thereby, a common combining circuit for pulses transmitted over said paths, means in individual paths for differently weighting the amplitudes of the pulses therein, and means controlled by certain of the produced pulses for altering the weighting given to the pulses in the individual paths.

Claim 12

In a pulse generating system, separate pulse producing means, separate transmission paths for the pulses produced thereby, a common combining circuit for pulses transmitted over said paths, means in individual paths for differently weighting the amplitudes of the pulses therein, and means controlled by certain of the produced pulses for altering the weighting given to the pulses in the individual paths.

Claim 13

The invention claimed in claim 7 in which said last means includes a distribution circuit for applying control energy to different weighting means at different times and means to actuate said distributor circuit to shift the application of control energy from one weighting means to the next.

Claim 14

In a pulse generating system, a plurality of separate pulse generating means, a common output circuit for pulses from a plurality of said pulse generating means, a plurality of means for adding other pulses in said common output to the pulses from said plurality of pulse generating means, a selector circuit for selecting among said plurality of pulse adding means, and means controlled by pulses from a plurality of said pulse generating means for actuating said selector circuit.

Claim 15

In a pulse generating system, a plurality of separate pulse generating means, a common output circuit for pulses from a plurality of said pulse generating means, a plurality of means for adding other pulses in said common output to the pulses from said plurality of pulse generating means, a selector circuit for selecting among said plurality of pulse adding means, and means controlled by pulses from a plurality of said pulse generating means for actuating said selector circuit.

Claim 16

The combination claimed in claim 9 comprising means actuated by simultaneous pulses in more than two of said pulse generating means for actuating said selector circuit.

Claim 17

The combination claimed in claim 9 in which said selector circuit has a zero position and means actuated by simultaneous pulses in all of said pulse generating means for resetting said selector circuit to zero position.

Claim 18

In a key producing system, a utilization circuit, a plurality of individual pulse generators, a circuit leading from each, a pair of holding devices for each terminal of certain of said circuits, each device having an output, means controlled by pulses in others of said circuits to determine whether one or the other of the pair of holding devices is enabled to receive pulses from the respective certain circuit, the other holding device of the pair maintaining on its output terminal the pulse last received over the respective certain circuit, and means to combine the pulses in the outputs of both devices of a pair for application to said utilization circuit.

Claim 19

In a key producing system, a utilization circuit, a plurality of individual pulse generators, a circuit leading from each, a pair of holding devices for each terminal of certain of said circuits, each device having an output, means controlled by pulses in others of said circuits to determine whether one or the other of the pair of holding devices is enabled to receive pulses from the respective certain circuit, the other holding device of the pair maintaining on its output terminal the pulse last received over the respective certain circuit, and means to combine the pulses in the outputs of both devices of a pair for application to said utilization circuit.

Claim 20

In a pulse generating system, a plurality of sources of irregular sequences of two-valued pulses, separate circuits leading from said respective sources, a corresponding plurality of output terminals, pairs of holding circuits inserted between said separate circuits and said output terminals for impressing pulses upon respective output terminals, means for operatively associating the input side of each holding circuit with or dissociating it from a respective circuit in irregular time order, each holding circuit on its output side remaining continuously in operative relation with a respective output terminal, each holding circuit when its input side is dissociated from its respective circuit continuing to impress upon its respective output terminal the same pulse value that it was caused to impress upon such output terminal when its input side was last associated with its respective circuit, and means to cause each holding circuit when its input side is operatively associated with its respective circuit to impress upon its output terminal a pulse whose value is determined by the pulse that is present in said circuit.

Claim 21

In a pulse generating system, a plurality of sources of irregular sequences of two-valued pulses, separate circuits leading from said respective sources, a corresponding plurality of output terminals, pairs of holding circuits inserted between said separate circuits and said output terminals for impressing pulses upon respective output terminals, means for operatively associating the input side of each holding circuit with or dissociating it from a respective circuit in irregular time order, each holding circuit on its output side remaining continuously in operative relation with a respective output terminal, each holding circuit when its input side is dissociated from its respective circuit continuing to impress upon its respective output terminal the same pulse value that it was caused to impress upon such output terminal when its input side was last associated with its respective circuit, and means to cause each holding circuit when its input side is operatively associated with its respective circuit to impress upon its output terminal a pulse whose value is determined by the pulse that is present in said circuit.

Claim 22

In a pulse generating system, separate input circuits carrying irregular sequences of two-valued pulses, a pair of holding circuits for each input circuit, each holding circuit having an input connection and an output connection, other input circuits carrying irregular sequences of two-valued pulses, means controlled from said other input circuits for operatively associating the input connections of said holding circuits individually with, or dissociating said input connections from, said input circuits, output circuits connected to respective holding circuits at their output connections, means to cause each holding circuit to transmit into its respective output circuit pulses received from an input circuit with which the input connection of the holding circuit is operatively associated, and means to cause each holding circuit to continue to transmit into its respective output circuit when its input connection is dissociated from an input circuit the pulse value last received from an input circuit by said holding circuit.

Claim 23

In a pulse generating system, separate input circuits carrying irregular sequences of two-valued pulses, a pair of holding circuits for each input circuit, each holding circuit having an input connection and an output connection, other input circuits carrying irregular sequences of two-valued pulses, means controlled from said other input circuits for operatively associating the input connections of said holding circuits individually with, or dissociating said input connections from, said input circuits, output circuits connected to respective holding circuits at their output connections, means to cause each holding circuit to transmit into its respective output circuit pulses received from an input circuit with which the input connection of the holding circuit is operatively associated, and means to cause each holding circuit to continue to transmit into its respective output circuit when its input connection is dissociated from an input circuit the pulse value last received from an input circuit by said holding circuit.

Claim 24

In a pulse generating system, means to produce in separate circuits separate irregular series of pulses each having one of a definite number of amplitude values, said pulses being of equal pulse period, a common output for all of said pulses, holding circuits inserted between said separate circuits and said common output, means included in each holding circuit to enable it to hold over a pulse into a subsequent pulse period and means for impressing upon said common output pulses currently received from certain of said separate circuits and pulses held over from previous pulse periods by one or more of said holding circuits.

Claim 25

In a pulse generating system, means to produce in separate circuits separate irregular series of pulses each having one of a definite number of amplitude values, said pulses being of equal pulse period, a common output for all of said pulses, holding circuits inserted between said separate circuits and said common output, means included in each holding circuit to enable it to hold over a pulse into a subsequent pulse period and means for impressing upon said common output pulses currently received from certain of said separate circuits and pulses held over from previous pulse periods by one or more of said holding circuits.

Claim 26

In a key generating system, a plurality of separate sources of irregularly occurring two-valued pulses having either zero value or one unit of pulse strength, means for variously combining pulses from said separate sources in different manners in time succession to produce resultant combination pulses simultaneously occurring in three separate circuits, said latter means including control circuits for automatically varying the manners of combining said pulses in irregular sequences, a common output for receiving summations of the resultant combination pulses in said three separate circuits, said control circuits including means for substantially uniformly distributing over long periods of time the pulse values of said summation pulses by causing the resultant combination pulses to have for one-third of the time on the average the values zero or one unit, zero or two units and zero or three units in the respective three circuits, and to have for another one-third of the time on the average the values zero or two units, zero or two units and zero or three units in the respective three circuits and to have for the remaining one-third of the time on the average the values zero or one unit, zero or four units and zero or three units in the respective three circuits.

Claim 27

In a key generating system, a plurality of separate sources of irregularly occurring two-valued pulses having either zero value or one unit of pulse strength, means for variously combining pulses from said separate sources in different manners in time succession to produce resultant combination pulses simultaneously occurring in three separate circuits, said latter means including control circuits for automatically varying the manners of combining said pulses in irregular sequences, a common output for receiving summations of the resultant combination pulses in said three separate circuits, said control circuits including means for substantially uniformly distributing over long periods of time the pulse values of said summation pulses by causing the resultant combination pulses to have for one-third of the time on the average the values zero or one unit, zero or two units and zero or three units in the respective three circuits, and to have for another one-third of the time on the average the values zero or two units, zero or two units and zero or three units in the respective three circuits and to have for the remaining one-third of the time on the average the values zero or one unit, zero or four units and zero or three units in the respective three circuits.

Claim 28

In a pulse generating system, means to produce separate irregular series of two-valued pulses, means to hold over certain of said pulses for irregular lengths of time, means under control of said pulse producing means and said pulse holding means to provide irregular series of two-valued output pulses and means under the joint control of a produced pulse and one of said pulses that have been held over for irregular lengths of time for determining whether the output pulse has one or the other of its two possible values.

Claim 29

In a pulse generating system, means to produce separate irregular series of two-valued pulses, means to hold over certain of said pulses for irregular lengths of time, means under control of said pulse producing means and said pulse holding means to provide irregular series of two-valued output pulses and means under the joint control of a produced pulse and one of said pulses that have been held over for irregular lengths of time for determining whether the output pulse has one or the other of its two possible values.

Claim 30

In a pulse generating system, separate sources each producing a different series of irregularly occurring two-valued pulses, means to hold over certain of said pulses for different times, means controlled by said sources and said holding-over means to provide irregular series of two-valued output pulses, means controlled by certain of the produced pulses to determine the length of time said certain pulses are held over, and means to combine one of said produced pulses with one of said held-over pulses to produce one of said output pulses.

Claim 31

In a pulse generating system, separate sources each producing a different series of irregularly occurring two-valued pulses, means to hold over certain of said pulses for different times, means controlled by said sources and said holding-over means to provide irregular series of two-valued output pulses, means controlled by certain of the produced pulses to determine the length of time said certain pulses are held over, and means to combine one of said produced pulses with one of said held-over pulses to produce one of said output pulses.