US3179930A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit condition indicating systems
Assignee: Cutler Hammer Inc
•
Filing: 1961-03-28
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Granted: 1965-04-20
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Expires: 1981-03-28
Abstract
No abstract record available.
Inventors
- 👤 Pell Eric
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:32
CPC Classifications
H; H02; H02H; H02H3/00; H02H3/02; H02H3/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
IN A SYSTEM FOR INDICATING CLOSED AND OPEN CONDITIONS OF A CIRCUIT CONTROL CONTACT, THE COMBINATION OF AN ELECTRORESPONSIVE INDICATOR, AN INDICATOR CONTROL CIRCUIT AND AN ELECTRICAL POWER SUPPLY SOURCE THEREFOR, SAID INDICATOR HAVING AN ENERGIZED CONDITION FOR INDICATING THE CLOSED CONDITION OF SAID CIRCUIT CONTROL CONTACT AND A DEENERGIZED CONDITION FOR INDICATING AN OPEN CONDITION OF SAID CIRCUIT CONTROL CONTACT, SAID INDICATOR CONTROL CIRCUIT COMPRISING A CONTROLLABLE SEMI-CONDUCTOR DEVICE, MEANS APPLYING A CONTROL VOLTAGE FROM SAID SOURCE TO SAID SEMI-CONDUCTOR DEVICE TO RENDER THE LATTER CONDUCTING, A CRICUIT CONNECTING SAID INDICATOR AS A LOAD TO SAID SEMI-
Claim 2
Dependent Claim
98 words
IN A SYSTEM FOR INDICATING CLOSED AND OPEN CONDITIONS OF A CIRCUIT CONTROL CONTACT, THE COMBINATION OF AN ELECTRORESPONSIVE INDICATOR, AN INDICATOR CONTROL CIRCUIT AND AN ELECTRICAL POWER SUPPLY SOURCE THEREFOR, SAID INDICATOR HAVING AN ENERGIZED CONDITION FOR INDICATING THE CLOSED CONDITION OF SAID CIRCUIT CONTROL CONTACT AND A DEENERGIZED CONDITION FOR INDICATING AN OPEN CONDITION OF SAID CIRCUIT CONTROL CONTACT, SAID INDICATOR CONTROL CIRCUIT COMPRISING A CONTROLLABLE SEMI-CONDUCTOR DEVICE, MEANS APPLYING A CONTROL VOLTAGE FROM SAID SOURCE TO SAID SEMI-CONDUCTOR DEVICE TO RENDER THE LATTER CONDUCTING, A CRICUIT CONNECTING SAID INDICATOR AS A LOAD TO SAID SEMI-
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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) | 1968-04-19 | 1968-10-19 | 1969-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-19 | 1972-10-19 | 1973-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-19 | 1976-10-19 | 1977-04-20 | $7700.00 | Window Closed / Lapsed |