Patent US3164365A successfully refreshed from Google Patents.
Patent US3619788A successfully refreshed from Google Patents.
US3619788A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit for giving priority to one of a plurality of automatically monitored channels in a receiver
Assignee: General Electric Co
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Filing: 1969-04-14
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Granted: 1971-11-09
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Expires: 1989-04-14
Abstract
Abstract A receiver is recurringly switched between channels until a signal is received and the receiver is locked onto that channel. If the receiver is locked on the nonpriority channel, a circuit is actuated to sample the priority channel repeatedly to determine whether a signal has since been received on the priority channel. If a signal is sensed on the priority channel during the sampling intervals, the receiver is switched from the nonpriority channel to the desired priority channel in spite of the presence of the signal on the nonpriority channel.
Inventors
- 👤 Olin S Giles Jr
- 👤 Seymour Paul Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:56
CPC Classifications
H; H03; H03J; H03J7/00; H03J7/18
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
396 words
In a radio receiver having means for causing said receiver to be receptive to a priority channel and to at least one nonpriority channel in a selected sequence, the improvement for making the receiver receptive to the channel having a signal, periodically monitoring the priority channel if the receiver remains receptive to a nonpriority channel, and making the receiver receptive to the priority channel if a signal is present thereon during a monitor period; said improvement comprising: a. switching means having an input for switching pulses and an output adapted to be connected to the means for causing the radio receiver to be sequentially receptive to each channel in response to said switching pulses; b. a pulse generator for producing switching pulses at a selected rate; c. a first gate connected between said pulse generator and said switching means input, said first gate having an input adapted to be connected to said radio receiver so that said first gate passes switching pulses from said pulse generator to said switching means input in the absence of a received signal and blocks switching pulses from said pulse generator to said switching means input in the presence of a received signal on any channel; d. a second gate connected between said pulse generator and said switching means input, said second gate having an input connected to a circuit so that said second gate passes switching pulses from said pulse generator to said switching means input only in response to said radio receiver being receptive to a nonpriority channel and blocks switching pulses from said pulse generator to said switching means input only in response to said radio receiver being receptive to a priority channel; e. a timing circuit having an input for receiving switching pulses and an output for producing a delayed switching pulse at a selected time following receipt of a switching pulse applied to said timing circuit input; f. and a third gate connected between said timing circuit output and said switching means input, said third gate having an input adapted to be connected to said radio receiver so that said third gate passes delayed switching pulses from said timing circuit to said switching means input in the absence of a received signal and blocks delayed switching pulses from said timing circuit to said switching means input in the presence of a received signal on any channel.
Claim 2
Dependent Claim
396 words
In a radio receiver having means for causing said receiver to be receptive to a priority channel and to at least one nonpriority channel in a selected sequence, the improvement for making the receiver receptive to the channel having a signal, periodically monitoring the priority channel if the receiver remains receptive to a nonpriority channel, and making the receiver receptive to the priority channel if a signal is present thereon during a monitor period; said improvement comprising: a. switching means having an input for switching pulses and an output adapted to be connected to the means for causing the radio receiver to be sequentially receptive to each channel in response to said switching pulses; b. a pulse generator for producing switching pulses at a selected rate; c. a first gate connected between said pulse generator and said switching means input, said first gate having an input adapted to be connected to said radio receiver so that said first gate passes switching pulses from said pulse generator to said switching means input in the absence of a received signal and blocks switching pulses from said pulse generator to said switching means input in the presence of a received signal on any channel; d. a second gate connected between said pulse generator and said switching means input, said second gate having an input connected to a circuit so that said second gate passes switching pulses from said pulse generator to said switching means input only in response to said radio receiver being receptive to a nonpriority channel and blocks switching pulses from said pulse generator to said switching means input only in response to said radio receiver being receptive to a priority channel; e. a timing circuit having an input for receiving switching pulses and an output for producing a delayed switching pulse at a selected time following receipt of a switching pulse applied to said timing circuit input; f. and a third gate connected between said timing circuit output and said switching means input, said third gate having an input adapted to be connected to said radio receiver so that said third gate passes delayed switching pulses from said timing circuit to said switching means input in the absence of a received signal and blocks delayed switching pulses from said timing circuit to said switching means input in the presence of a received signal on any channel.
Claim 3
Dependent Claim
16 words
The improvement of claim 1 wherein said timing circuit input is connected to said second gate.
Claim 4
Dependent Claim
43 words
The improvement of claim 1 wherein said circuit connected to said second gate input is connected between said switching means output and said second gate input, and wherein said circuit comprises means for selecting which of said receiver channels is said priority channel.
Claim 5
Dependent Claim
37 words
The improvement of claim 1 and further comprising a frequency dIvider circuit connected between said pulse generator and said second gate for supplying switching pulses to said second gate at a rate less than said selected rate.
Claim 6
Dependent Claim
49 words
The improvement of claim 10 and further comprising a frequency divider circuit connected between said pulse generator and said second gate for supplying switching pulses to said second gate at a rate less than said selected rate, and wherein said timing circuit input is connected to said second gate.
Claim 7
Dependent Claim
43 words
The improvement of claim 5 wherein said circuit connected to said second gate input is connected between said switching means output and said second gate input, and wherein said circuit comprises means for selecting which of said receiver channels is said priority channel.
Claim 8
Dependent Claim
33 words
The improvement of claim 5 wherein the selected time delay of said timing circuit is less than the time interval between said switching pulses produced at said selected rate by said switching means.
References Cited (Backward Citations)
US3482166A
Cited
US3497813A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-08 | 1975-05-10 | 1975-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-08 | 1979-05-10 | 1979-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-08 | 1983-05-10 | 1983-11-09 | $7700.00 | Window Closed / Lapsed |