US3145298A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Secant function generator
Assignee: Individual
•
Filing: 1962-04-03
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Granted: 1964-08-18
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Expires: 1982-04-03
Abstract
No abstract record available.
Inventors
- 👤 Glenn B Shoemaker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:57
CPC Classifications
G; G06; G06F; G06F1/00; G06F1/02; G06F1/03; G06F1/0314; G06F2101/00; G06F2101/04; H; H03; H03M; H03M1/00; H03M1/12; H03M1/22; H03M1/24; H03M1/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
190 words
A SECANT FUNCTION GENERATOR PROVIDING AN INCREMENTALLY VARIABLE VOLTAGE PROPORTIONAL TO THE SECANT OF THE INSTANTANEOUS LATITUDE OF AN AIRCRAFT, COMPRISING IN COMBINATION: A ROTATABLE DISC HAVING A PLURALITY OF ENCIRCLING CHANNELS THEREON, EACH OF SAID CHANNELS COMPRISING CONDUCTIVE AND NONCONDUCTIVE PORTIONS, POWER SUPPLY MEANS APPLYING A VOLTAGE TO SAID CONDUCTIVE PORTIONS, MOTOR MEANS FOR STEPPING SAID ROTATABLE DISC THROUGHOUT A PLURALITY OF POSITIONS ACCORDING TO THE SECANT FUNCTION OF THE LATITUDE, A PLURALITY OF RELAYS, A PLURALITY OF CONDUCTORS, EACH OF SAID CONDUCTORS CONNECTED AT ONE END TO ONE OF THE COILS OF SAID PLURALITY OF RELAYS AND AT THE OTHER END AS A WIPER ARM TO ONE OF SAID PLURALITY OF CHANNELS, A PLURALITY OF TRANSFORMERS HAVING PRIMARY COILS CONNECTED IN PARALLEL TO A COMMON SOURCE, FIRST SWITCH MEANS ASSOCIATED WITH EACH OF SAID PLURALITY OF RELAYS CONNECTING VARIOUS COMBINATIONS OF THE SECONDARY COILS OF SAID PLURALITY OF TRANSFORMERS IN SERIES ACCORDING TO THE PARTICULAR ONE OF SAID PLURALITY OF POSITIONS THAT SAID DISC OCCUPIES WHEREBY THE VOLTAGE ACROSS SAID VARIOUS COMBINATIONS OF SAID SECONDARY COILS IS PROPORTIONAL TO THE SECANT OF THE INSTANTANEOUS LATITUDE OF THE AIRCRAFT.
Claim 2
Dependent Claim
190 words
A SECANT FUNCTION GENERATOR PROVIDING AN INCREMENTALLY VARIABLE VOLTAGE PROPORTIONAL TO THE SECANT OF THE INSTANTANEOUS LATITUDE OF AN AIRCRAFT, COMPRISING IN COMBINATION: A ROTATABLE DISC HAVING A PLURALITY OF ENCIRCLING CHANNELS THEREON, EACH OF SAID CHANNELS COMPRISING CONDUCTIVE AND NONCONDUCTIVE PORTIONS, POWER SUPPLY MEANS APPLYING A VOLTAGE TO SAID CONDUCTIVE PORTIONS, MOTOR MEANS FOR STEPPING SAID ROTATABLE DISC THROUGHOUT A PLURALITY OF POSITIONS ACCORDING TO THE SECANT FUNCTION OF THE LATITUDE, A PLURALITY OF RELAYS, A PLURALITY OF CONDUCTORS, EACH OF SAID CONDUCTORS CONNECTED AT ONE END TO ONE OF THE COILS OF SAID PLURALITY OF RELAYS AND AT THE OTHER END AS A WIPER ARM TO ONE OF SAID PLURALITY OF CHANNELS, A PLURALITY OF TRANSFORMERS HAVING PRIMARY COILS CONNECTED IN PARALLEL TO A COMMON SOURCE, FIRST SWITCH MEANS ASSOCIATED WITH EACH OF SAID PLURALITY OF RELAYS CONNECTING VARIOUS COMBINATIONS OF THE SECONDARY COILS OF SAID PLURALITY OF TRANSFORMERS IN SERIES ACCORDING TO THE PARTICULAR ONE OF SAID PLURALITY OF POSITIONS THAT SAID DISC OCCUPIES WHEREBY THE VOLTAGE ACROSS SAID VARIOUS COMBINATIONS OF SAID SECONDARY COILS IS PROPORTIONAL TO THE SECANT OF THE INSTANTANEOUS LATITUDE OF THE AIRCRAFT.
References Cited (Backward Citations)
US2403152A
Cited
US3022500A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-08-18 | 1968-02-17 | 1968-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-18 | 1972-02-17 | 1972-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-18 | 1976-02-17 | 1976-08-18 | $7700.00 | Window Closed / Lapsed |