US3300689A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Voltage sensing circuit
Assignee: Westinghouse Canada Inc
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Filing: 1963-11-21
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Granted: 1967-01-24
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Expires: 1983-11-21
Abstract
No abstract record available.
Inventors
- 👤 John M Beddoes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:15
CPC Classifications
H; H02; H02H; H02H3/00; H02H3/02; H02H3/06; H02H3/066; H02J; H02J9/00; H02J9/04; H02J9/06; H02J9/061
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
A VOLTAGE SENSING CIRCUIT COMPRISING INPUT TERMINALS ADAPTED FOR CONNECTION TO A SOURCE OF VOLTAGE, FIRST AND SECOND VOLTAGE DIVIDING NETWORKS CONNECTED IN CIRCUIT RELATION WITH SAID TERMINALS FOR DERIVING FIRST AND SECOND SEPARATE CONTROL VOLTAGES, RESPECTIVELY, WHICH EACH VARY WITH THE VOLTAGE OF SAID SOURCE, A BISTABLE CIRCUIT INCLUDING FIRST AND SECOND EMITTER COUPLED TRANSISTORS HAVING AN INPUT AND ONLY FIRST AND SECOND STABLE OPERATING CONDITIONS, A RELAY HAVING AN OPERATING COIL AND CONTACTS ACTUABLE BY THE ENERGIZATION AND DEENERGIZATION OF THE OPERATING COIL FOR CONNECTING EITHER SAID FIRST NETWORK OR SAID SECOND NETWORK TO THE INPUT OF SAID BISTABLE CIRCUIT TO ACTUATE SAID BISTABLE CIRCUIT BETWEEN SAID FIRST AND SECOND OPERATING CONDITIONS IN RESPONSE TO SAID FIRST OR SECOND CONTROL VOLTAGES, AND A SWITCHING TRANSISTOR CONNECTED BETWEEN
Claim 2
Dependent Claim
129 words
A VOLTAGE SENSING CIRCUIT COMPRISING INPUT TERMINALS ADAPTED FOR CONNECTION TO A SOURCE OF VOLTAGE, FIRST AND SECOND VOLTAGE DIVIDING NETWORKS CONNECTED IN CIRCUIT RELATION WITH SAID TERMINALS FOR DERIVING FIRST AND SECOND SEPARATE CONTROL VOLTAGES, RESPECTIVELY, WHICH EACH VARY WITH THE VOLTAGE OF SAID SOURCE, A BISTABLE CIRCUIT INCLUDING FIRST AND SECOND EMITTER COUPLED TRANSISTORS HAVING AN INPUT AND ONLY FIRST AND SECOND STABLE OPERATING CONDITIONS, A RELAY HAVING AN OPERATING COIL AND CONTACTS ACTUABLE BY THE ENERGIZATION AND DEENERGIZATION OF THE OPERATING COIL FOR CONNECTING EITHER SAID FIRST NETWORK OR SAID SECOND NETWORK TO THE INPUT OF SAID BISTABLE CIRCUIT TO ACTUATE SAID BISTABLE CIRCUIT BETWEEN SAID FIRST AND SECOND OPERATING CONDITIONS IN RESPONSE TO SAID FIRST OR SECOND CONTROL VOLTAGES, AND A SWITCHING TRANSISTOR CONNECTED BETWEEN
References Cited (Backward Citations)
US2959317A
Cited
GB917640A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-23 | 1970-07-25 | 1971-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-23 | 1974-07-25 | 1975-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-23 | 1978-07-25 | 1979-01-24 | $7700.00 | Window Closed / Lapsed |