Patent US3217318A successfully refreshed from Google Patents.
US3217318A
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US
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Angle indicator or encoder
Assignee: General Precision Inc
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Filing: 1962-11-29
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Granted: 1965-11-09
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Expires: 1982-11-29
Abstract
No abstract record available.
Inventors
- 👤 Masel Marvin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:37
CPC Classifications
H; H03; H03M; H03M1/00; G; G05; G05D; G05D3/00; G05D3/12; G05D3/14; G05D3/18; G05D3/183; G05D3/20; G05D3/203; H03M1/12; H03M1/48
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
161 words
AN ANGLE INDICATOR, COMPRISING IN COMBINATION, COARSE AND FINE SYNCHRO ELECTRICAL SERVO LOOP CIRCUITS, EACH LOOP CIRCUIT INCLUDING, A CONTROL TRANSMITTER; A CONTROL TANSFORMER WITH INPUT AND OUTPUT SIDE SENSING ON THE INPUT SIDE THE SIGNAL FROM THE CONTROL TRANSMITTER AND PRODUCING ON THE OUTPUT SIDE A SIGNAL CORRESPONDING TO SAID SENSED SIGNAL; PHASE SENSITIVE DETECTOR MEANS CONNECTED TO THE OUTPUT SIDE OF SAID CONTROL TRANSFORMER INCLUDING THEREIN, A PAIR OF TRANSISTOR EACH SO DISPOSED AS TO PASS CURRENT OF ONLY THE ONE OR THE OTHER PHASE, SAID TRANSISTORS EACH HAVING BASE ELECTRODES CONTROLLING THE PASSING OF CURRENT AND OUTPUT ELECTRODES, A PULSE SAMPLING NETWORK FEEDING PULSES TO SAID BASE ELECTRODE, A TUNNEL DIODE CONNECTED TO EACH OF SAID OUTPUT ELECTRODES, SAID TUNNEL DIODES BEING NORMALLY NON-CONDUCTING, PASSING ONLY A SIGNAL EXCEEDING A PREDETERMINED VALUE, RESISTOR MEANS CONNECTED TO SAID CONTROL TRANSFORMER OUTPUT SIDE FIXING SAID PREDETERMINED VALUE; AMPLIFIER MEANS CONNECTED TO SAID TUNNEL DIODES; A STEPPER MOTOR ACTED ON BY
Claim 2
Dependent Claim
161 words
AN ANGLE INDICATOR, COMPRISING IN COMBINATION, COARSE AND FINE SYNCHRO ELECTRICAL SERVO LOOP CIRCUITS, EACH LOOP CIRCUIT INCLUDING, A CONTROL TRANSMITTER; A CONTROL TANSFORMER WITH INPUT AND OUTPUT SIDE SENSING ON THE INPUT SIDE THE SIGNAL FROM THE CONTROL TRANSMITTER AND PRODUCING ON THE OUTPUT SIDE A SIGNAL CORRESPONDING TO SAID SENSED SIGNAL; PHASE SENSITIVE DETECTOR MEANS CONNECTED TO THE OUTPUT SIDE OF SAID CONTROL TRANSFORMER INCLUDING THEREIN, A PAIR OF TRANSISTOR EACH SO DISPOSED AS TO PASS CURRENT OF ONLY THE ONE OR THE OTHER PHASE, SAID TRANSISTORS EACH HAVING BASE ELECTRODES CONTROLLING THE PASSING OF CURRENT AND OUTPUT ELECTRODES, A PULSE SAMPLING NETWORK FEEDING PULSES TO SAID BASE ELECTRODE, A TUNNEL DIODE CONNECTED TO EACH OF SAID OUTPUT ELECTRODES, SAID TUNNEL DIODES BEING NORMALLY NON-CONDUCTING, PASSING ONLY A SIGNAL EXCEEDING A PREDETERMINED VALUE, RESISTOR MEANS CONNECTED TO SAID CONTROL TRANSFORMER OUTPUT SIDE FIXING SAID PREDETERMINED VALUE; AMPLIFIER MEANS CONNECTED TO SAID TUNNEL DIODES; A STEPPER MOTOR ACTED ON BY
References Cited (Backward Citations)
US3045230A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-08 | 1969-05-10 | 1969-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-08 | 1973-05-10 | 1973-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-08 | 1977-05-10 | 1977-11-09 | $7700.00 | Window Closed / Lapsed |