US3136928A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sensing circuit
Assignee: Pye Electronic Products Ltd
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Filing: 1961-10-23
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Granted: 1964-06-09
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Expires: 1981-10-23
Abstract
No abstract record available.
Inventors
- 👤 Avis Donald William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:07
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/30; H03F1/302
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
A SENSING CIRCUIT FOR PRODUCING AN INDICATION IN RESPONSE TO A SMALL D.C. CURRENT OR VOLTAGE AND CONSISTING OF A TRANSISTOR AMPLIFIER TO WHICH THE SMALL CURRENT OR VOLTAGE TO BE INDICATED IS APPLIED, SAID AMPLIFIER COMPRISING A COMMON EMITTER INPUT STAGE, A COMMON COLLECTOR INTERMEDIATE STAGE AND A COMMON EMITTER OUTPUT STAGE, A DIODE DEVICE CONNECTED ACROSS THE INPUT TO SAID COMMON EMITTER INPUT STAGE TO POLARISE SAID CIRCUIT, RELAY MEANS CONNECTED TO SAID COMMON EMITTER OUTPUT STAGE AND OPERATED UPON THE INPUT CURRENT OR VOLTAGE EXCEEDING A PREDETERMINED SMALL VALUE, AND TEMPERATURE STABILISING MEANS COMPRISING A FURTHER TRANSISTOR CONNECTED IN THE EMITTER CIRCUIT OF SAID COMMON EMITTER INPUT STAGE FOR NEUTRALISING FLUCTUATIONS IN THE COLLECTOR CURRENT OF SAID INPUT TRANSISTOR WITH CHANGES IN TEMPERATURE.
Claim 2
Dependent Claim
126 words
A SENSING CIRCUIT FOR PRODUCING AN INDICATION IN RESPONSE TO A SMALL D.C. CURRENT OR VOLTAGE AND CONSISTING OF A TRANSISTOR AMPLIFIER TO WHICH THE SMALL CURRENT OR VOLTAGE TO BE INDICATED IS APPLIED, SAID AMPLIFIER COMPRISING A COMMON EMITTER INPUT STAGE, A COMMON COLLECTOR INTERMEDIATE STAGE AND A COMMON EMITTER OUTPUT STAGE, A DIODE DEVICE CONNECTED ACROSS THE INPUT TO SAID COMMON EMITTER INPUT STAGE TO POLARISE SAID CIRCUIT, RELAY MEANS CONNECTED TO SAID COMMON EMITTER OUTPUT STAGE AND OPERATED UPON THE INPUT CURRENT OR VOLTAGE EXCEEDING A PREDETERMINED SMALL VALUE, AND TEMPERATURE STABILISING MEANS COMPRISING A FURTHER TRANSISTOR CONNECTED IN THE EMITTER CIRCUIT OF SAID COMMON EMITTER INPUT STAGE FOR NEUTRALISING FLUCTUATIONS IN THE COLLECTOR CURRENT OF SAID INPUT TRANSISTOR WITH CHANGES IN TEMPERATURE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-09 | 1967-12-09 | 1968-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-09 | 1971-12-09 | 1972-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-09 | 1975-12-09 | 1976-06-09 | $7700.00 | Window Closed / Lapsed |