US3271630A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Overcurrent interrupting apparatus
Assignee: Torio KK
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Filing: 1963-06-11
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Granted: 1966-09-06
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Expires: 1983-06-11
Abstract
No abstract record available.
Inventors
- 👤 Miyazawa Kazumichi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:25
CPC Classifications
H; H01; H01H; H01H81/00; H01H81/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
AN OVERCURRENT INTERRUPTING APPARATUS COMPRISING A RELAY WHICH CONSISTS OF A MAIN COIL, A HOLDING COIL, TWO PAIRS OF CONTACTS AND A PAIR OF ARMATURES, A DIRECT CURRENT SOURCE WHICH IS CONNECTED TO SAID MAIN COIL THROUGH ONE OF SAID ARMATURES AND ONE OF SAID CONTACTS, A TRANSISTOR, TO THE BASE OF WHICH A BIAS VOLTAGE IS GIVEN BY SAID SOURCE THROUGH ANOTHER ARMATURE AND ONE OF SAID CONTACTS AS WELL AS TWO RESISTORS, THE EMITTER OF SAID TRANSISTOR BEING EARTHED THROUGH SAID HOLDING COIL AND THE COLLECTOR OF SAID TRANSISTOR BEING CONNECTED TO ONE OF OPENED CONTACTS, AND A PARALLEL CIRCUIT CONSISTING OF A RESISTOR AND A CONDENSER FOR PROVIDING A SUITABLE TIME CONSTANT, ONE END OF WHICH IS CONNECTED TO THE CONNECTION POINT OF SAID TWO RESISTORS, THE OTHER END OF SAID PARALLEL CIRCUIT BEING EARTHED.
Claim 2
Dependent Claim
138 words
AN OVERCURRENT INTERRUPTING APPARATUS COMPRISING A RELAY WHICH CONSISTS OF A MAIN COIL, A HOLDING COIL, TWO PAIRS OF CONTACTS AND A PAIR OF ARMATURES, A DIRECT CURRENT SOURCE WHICH IS CONNECTED TO SAID MAIN COIL THROUGH ONE OF SAID ARMATURES AND ONE OF SAID CONTACTS, A TRANSISTOR, TO THE BASE OF WHICH A BIAS VOLTAGE IS GIVEN BY SAID SOURCE THROUGH ANOTHER ARMATURE AND ONE OF SAID CONTACTS AS WELL AS TWO RESISTORS, THE EMITTER OF SAID TRANSISTOR BEING EARTHED THROUGH SAID HOLDING COIL AND THE COLLECTOR OF SAID TRANSISTOR BEING CONNECTED TO ONE OF OPENED CONTACTS, AND A PARALLEL CIRCUIT CONSISTING OF A RESISTOR AND A CONDENSER FOR PROVIDING A SUITABLE TIME CONSTANT, ONE END OF WHICH IS CONNECTED TO THE CONNECTION POINT OF SAID TWO RESISTORS, THE OTHER END OF SAID PARALLEL CIRCUIT BEING EARTHED.
References Cited (Backward Citations)
US3170088A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-05 | 1970-03-07 | 1970-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-05 | 1974-03-07 | 1974-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-05 | 1978-03-07 | 1978-09-06 | $7700.00 | Window Closed / Lapsed |