US3237107A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic gain-scheduling apparatus
Assignee: North American Aviation Corp
•
Filing: 1962-04-26
•
Granted: 1966-02-22
•
Expires: 1982-04-26
Abstract
No abstract record available.
Inventors
- 👤 Stanley W Bresenoff
- 👤 Frederick H Gardner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:22
CPC Classifications
G; G05; G05D; G05D1/00; G05D1/08; G05D1/0808; G05D1/0816
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
192 words
A DEVICE FOR SCHEDULING THE GAIN OF AN ELECTRICAL CIRCUIT AS AN INVERSE FUNCTION OF A SPACED PARAMETER COMPRISING: A TRANSDUCER HAVING A.-C. PICK-OFF ELEMENT COMPRISING A FIRST AND SECOND MUTUALLY OPPOSITELY VARIABLE A.-C. IMPEDANCE ELEMENT; A BRIDGE CIRCUIT COMPRISING SAID VARIABLE IMPEDANCE ELEMENTS; AN A.-C. AMPLIFIER HAVING AN INPUT AND OUTPUT; A SUMMING NETWORK COMPRISED OF A FIRST AND SECOND SUMMING IMPEDANCE, ONE TERMINAL OF EACH SAID SUMMING IMPEDANCE BEING COMMONLY CONNECTED TO THE INPUT TERMINAL OF SAID AMPLIFIER, THE OTHER TERMINAL OF SAID FIRST SUMMING IMPEDANCE BEING ADAPTED TO BE CONNECTED TO A SOURCE OF A SIGNAL WHOSE GAIN LEVEL IS SOUGHT TO BE PROGRAMMED, THE OTHER TERMINAL OF SAID SECOND SUMMING RESISTOR BEING CONNECTED TO THE OUTPUT OF SAID BRIDGE CIRCUIT; SAID BRIDGE CIRCUIT BEING EXCITED BY THE OUTPUT OF SAID AMPLIFIER TERMINAL OF SAID BRIDGE CIRCUIT AS TO PROVIDE A NEGATIVE FEEDBACK SIGNAL AT SAID SECOND SUMMING RESISTOR, AND QUANDRATURE NULLING MEANS INTERPOSED BETWEENE SAID A.-C. PICK OFF ELEMENT AND SAID OUTPUT OF SAID BRIDGE COMPRISING THE RESISTIVE ELEMENT OF A RESISTIVE POTENTIOMETER INTERCONNECTING VARIABLE IMPEDANCE ELEMENT, THE WIPER OF SAID POTENTIOMETER BEING CONNECTED TO SAID BRIDGE OUTPUT.
Claim 2
Independent Claim
192 words
A DEVICE FOR SCHEDULING THE GAIN OF AN ELECTRICAL CIRCUIT AS AN INVERSE FUNCTION OF A SPACED PARAMETER COMPRISING: A TRANSDUCER HAVING A.-C. PICK-OFF ELEMENT COMPRISING A FIRST AND SECOND MUTUALLY OPPOSITELY VARIABLE A.-C. IMPEDANCE ELEMENT; A BRIDGE CIRCUIT COMPRISING SAID VARIABLE IMPEDANCE ELEMENTS; AN A.-C. AMPLIFIER HAVING AN INPUT AND OUTPUT; A SUMMING NETWORK COMPRISED OF A FIRST AND SECOND SUMMING IMPEDANCE, ONE TERMINAL OF EACH SAID SUMMING IMPEDANCE BEING COMMONLY CONNECTED TO THE INPUT TERMINAL OF SAID AMPLIFIER, THE OTHER TERMINAL OF SAID FIRST SUMMING IMPEDANCE BEING ADAPTED TO BE CONNECTED TO A SOURCE OF A SIGNAL WHOSE GAIN LEVEL IS SOUGHT TO BE PROGRAMMED, THE OTHER TERMINAL OF SAID SECOND SUMMING RESISTOR BEING CONNECTED TO THE OUTPUT OF SAID BRIDGE CIRCUIT; SAID BRIDGE CIRCUIT BEING EXCITED BY THE OUTPUT OF SAID AMPLIFIER TERMINAL OF SAID BRIDGE CIRCUIT AS TO PROVIDE A NEGATIVE FEEDBACK SIGNAL AT SAID SECOND SUMMING RESISTOR, AND QUANDRATURE NULLING MEANS INTERPOSED BETWEENE SAID A.-C. PICK OFF ELEMENT AND SAID OUTPUT OF SAID BRIDGE COMPRISING THE RESISTIVE ELEMENT OF A RESISTIVE POTENTIOMETER INTERCONNECTING VARIABLE IMPEDANCE ELEMENT, THE WIPER OF SAID POTENTIOMETER BEING CONNECTED TO SAID BRIDGE OUTPUT.
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) | 1969-02-21 | 1969-08-23 | 1970-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-21 | 1973-08-23 | 1974-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-21 | 1977-08-23 | 1978-02-22 | $7700.00 | Window Closed / Lapsed |