US3244938A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Overcurrent protection apparatus
Assignee: Westinghouse Electric Corp
•
Filing: 1962-08-13
•
Granted: 1966-04-05
•
Expires: 1982-08-13
Abstract
No abstract record available.
Inventors
- 👤 Robert A Schatz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:39
CPC Classifications
G; G05; G05F; G05F1/00; G05F1/10; G05F1/12; G05F1/24; G05F1/26; G05F1/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
148 words
AN OVERCURRENT PROTECTION NETWORK COMPRISING: FIRST MEANS ASSOCIATED WITH A DEVICE TO BE PROTECTED FROM EXCESSIVE CURRENT FOR PROVIDING A FIRST SIGNAL RESPONSIVE TO THE CURRENT MAGNITUDE; SECOND MEANS CONNECTED IN CIRCUIT RELATION WITH SAID FIRST MEANS TO PRODUCE A PULSED SECOND SIGNAL WHEN CURRENT IN THE DEVICE TO BE PROTECTED EXCEEDS A PREDETERMINED MAGNITUDE; MONOSTABLE MULTIVIBRATOR TIMING MEANS CONNECTED IN CIRCUIT RELATION WITH SAID SECOND MEANS; SAID MONOSTABLE MULTIVIBRATOR TIMING MEANS INCLUDING FIRST AND SECOND CLOCKS; THE FIRST OF SAID CLOCKS HAVING AN INPUT CONNECTED TO SAID SECOND MEANS; THE OTHER OF SAID CLOCKS BEING CONNECTED IN SERIES WITH THE FIRST CLOCK SO THAT ONE CLOCK IS ON WHILE THE OTHER CLOCK IS RESETTING; BOTH OF SAID CLOCKS PROVIDING OUTPUT SIGNALS WHICH ARE CONNECTED TO TURN OFF THE PROTECTED DEVICE FOR A PREDETERMINED PERIOD WHEN SAID SECOND MEANS SENSES AN OVERCURRENT AND PROVIDES A PULSED SECOND SIGNAL;
Claim 2
Dependent Claim
148 words
AN OVERCURRENT PROTECTION NETWORK COMPRISING: FIRST MEANS ASSOCIATED WITH A DEVICE TO BE PROTECTED FROM EXCESSIVE CURRENT FOR PROVIDING A FIRST SIGNAL RESPONSIVE TO THE CURRENT MAGNITUDE; SECOND MEANS CONNECTED IN CIRCUIT RELATION WITH SAID FIRST MEANS TO PRODUCE A PULSED SECOND SIGNAL WHEN CURRENT IN THE DEVICE TO BE PROTECTED EXCEEDS A PREDETERMINED MAGNITUDE; MONOSTABLE MULTIVIBRATOR TIMING MEANS CONNECTED IN CIRCUIT RELATION WITH SAID SECOND MEANS; SAID MONOSTABLE MULTIVIBRATOR TIMING MEANS INCLUDING FIRST AND SECOND CLOCKS; THE FIRST OF SAID CLOCKS HAVING AN INPUT CONNECTED TO SAID SECOND MEANS; THE OTHER OF SAID CLOCKS BEING CONNECTED IN SERIES WITH THE FIRST CLOCK SO THAT ONE CLOCK IS ON WHILE THE OTHER CLOCK IS RESETTING; BOTH OF SAID CLOCKS PROVIDING OUTPUT SIGNALS WHICH ARE CONNECTED TO TURN OFF THE PROTECTED DEVICE FOR A PREDETERMINED PERIOD WHEN SAID SECOND MEANS SENSES AN OVERCURRENT AND PROVIDES A PULSED SECOND SIGNAL;
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-04 | 1969-10-04 | 1970-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-04 | 1973-10-04 | 1974-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-04 | 1977-10-04 | 1978-04-05 | $7700.00 | Window Closed / Lapsed |