US3668431A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Functions comparing circuit
Assignee: Unisys Corp
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Filing: 1970-10-23
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Granted: 1972-06-06
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Expires: 1990-10-23
Abstract
Abstract The circuit comprises first and second counters, each adapted to receive pulses representative of remote occurrences, and a gate circuit between the counters, the interconnections being such that the gate circuit permits no output pulse to be provided when a predetermined relationship exists between the counters and permits an output pulse to be transmitted when the predetermined relationship is disturbed.
Inventors
- 👤 George William Locke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:36
CPC Classifications
B; B65; B65H; B65H7/00; G; G06; G06F; G06F7/00; G06F7/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
191 words
Functions comparing circuit comprising a first counter and a first pulse source adapted to transmit pulses to said first counter, a first output lead from each position of each said first counter, a second counter and a second pulse source adapted to transmit pulses to said second counter, a second output lead from each position of each said second counter, said pulse sources in normal operation being adapted to transmit pulses to their respective counters, a signal output terminal, and a plurality of switching devices, all connected to said output terminal, said switching devices being connected between selected ones of said first output leads and selected ones of said second output leads, the arrangement being such that one position in each counter is energized at any instant and the potentials on the first and second output leads not associated with these positions insure that one switching device is ON and no output signal appears at said output terminal, however, when the energized position in each counter is associated with the same switching device, any switching device which is ON is turned OFF and an output signal appears on said output terminal.
Claim 2
Dependent Claim
191 words
Functions comparing circuit comprising a first counter and a first pulse source adapted to transmit pulses to said first counter, a first output lead from each position of each said first counter, a second counter and a second pulse source adapted to transmit pulses to said second counter, a second output lead from each position of each said second counter, said pulse sources in normal operation being adapted to transmit pulses to their respective counters, a signal output terminal, and a plurality of switching devices, all connected to said output terminal, said switching devices being connected between selected ones of said first output leads and selected ones of said second output leads, the arrangement being such that one position in each counter is energized at any instant and the potentials on the first and second output leads not associated with these positions insure that one switching device is ON and no output signal appears at said output terminal, however, when the energized position in each counter is associated with the same switching device, any switching device which is ON is turned OFF and an output signal appears on said output terminal.
Claim 3
Dependent Claim
43 words
The circuit defined in claim 1 wherein each switching device has first and second control electrodes, each first control electrode being connected to one of said first output leads and each second control electrode being connected to one of said second output leads.
Claim 4
Dependent Claim
34 words
The circuit defined in claim 2 wherein each switching device is a transistor, said first control electrode is the base of the transistor and said second control electrode is the emitter of the transistor.
References Cited (Backward Citations)
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US3143668A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-06 | 1975-12-06 | 1976-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-06 | 1979-12-06 | 1980-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-06 | 1983-12-06 | 1984-06-06 | $7700.00 | Window Closed / Lapsed |