US3135900A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Positioning servo for navigational computer
Assignee: Individual
•
Filing: 1961-05-09
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Granted: 1964-06-02
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Expires: 1981-05-09
Abstract
No abstract record available.
Inventors
- 👤 Smith Leo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:01
CPC Classifications
G; G05; G05D; G05D1/00; G05D1/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
A POSITIONING SERVO FOR A NAVIGATIONAL COMPUTER COMPRISING AN IRON CORE, TWO IDENTICAL COILS ON SAID CORE, A REFERENCE PHASE VOLTAGE IMPRESSED ON ONE OF SAID COILS, A VARIABLE PHASE VOLTAGE IMPRESSED ON THE OTHER COIL, BUFFER AMPLIFIERS FOR PROVIDING INPUT IMPEDANCES FOR THE SAID REFERENCE AND VARIABLE PHASE VOLTAGES AND A CONSTANT OUT-PUT VOLTAGE ACROSS THE VARYING IMPEDANCE OF THE COILS, A THIRD COIL ON SAID CORE, A POWER AMPLIFIER CONNECTED TO SAID THIRD CORE AND A TWO-PHASE ELECTRIC MOTOR CONNECTED TO SAID POWER AMPLIFIER, A PHASE SHIFTER PROVIDED WITH A ROTOR SHAFT, AND A GEAR TRAIN CONNECTING THE PHASE SHIFTER ROTOR SHAFT TO THE ELECTRIC MOTOR SO AS TO ROTATE THE ROTOR TOWARDS A NULL.
Claim 2
Dependent Claim
117 words
A POSITIONING SERVO FOR A NAVIGATIONAL COMPUTER COMPRISING AN IRON CORE, TWO IDENTICAL COILS ON SAID CORE, A REFERENCE PHASE VOLTAGE IMPRESSED ON ONE OF SAID COILS, A VARIABLE PHASE VOLTAGE IMPRESSED ON THE OTHER COIL, BUFFER AMPLIFIERS FOR PROVIDING INPUT IMPEDANCES FOR THE SAID REFERENCE AND VARIABLE PHASE VOLTAGES AND A CONSTANT OUT-PUT VOLTAGE ACROSS THE VARYING IMPEDANCE OF THE COILS, A THIRD COIL ON SAID CORE, A POWER AMPLIFIER CONNECTED TO SAID THIRD CORE AND A TWO-PHASE ELECTRIC MOTOR CONNECTED TO SAID POWER AMPLIFIER, A PHASE SHIFTER PROVIDED WITH A ROTOR SHAFT, AND A GEAR TRAIN CONNECTING THE PHASE SHIFTER ROTOR SHAFT TO THE ELECTRIC MOTOR SO AS TO ROTATE THE ROTOR TOWARDS A NULL.
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) | 1967-06-02 | 1967-12-02 | 1968-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-02 | 1971-12-02 | 1972-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-02 | 1975-12-02 | 1976-06-02 | $7700.00 | Window Closed / Lapsed |