Patent US3846676A successfully refreshed from Google Patents.
US3846676A
Expired / Lapsed
US
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Electronic control system for remote control circuit breakers
Assignee: Cutler Hammer Inc
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Filing: 1973-09-13
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Granted: 1974-11-05
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Expires: 1993-09-13
Abstract
Abstract An improved electronic control system for a remote control circuit breakers is disclosed. The system employs digital type logic modules which respond to closure and opening of a remote pilot control breaker to initiate and time the duration of energization of set and trip coils of the circuit breaker electromagnetic operator. The modules are so interconnected with RC and transistor circuits that they will automatically respond to, and function equally well, when auxiliary DC power only is available.
Inventors
- 👤 W Rutchik
- 👤 Zeeland D Van
- 👤 L Ryczek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:14
CPC Classifications
H; H02; H02H; H02H3/00; H02H3/08; H02J; H02J13/00; H02J13/13; H02J13/1311; H02J13/1313; H02H7/00; H02H7/005; H02J13/18; H02J13/34; H02J13/36; Y; Y02; Y02E; Y02E60/00; Y04; Y04S; Y04S10/00; Y04S10/20; Y04S40/00; Y04S40/12; Y04S40/121
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
116 words
In an electronic control for a remote control circuit breaker system in which a main circuit breaker is normally operated by energization of electromagnetic set and trip coils in response to the opening of a pilot control circuit breaker and in which overload trip-open of the main circuit breaker results in closure of overload trip contacts to initiate flow of a controlled current through the pilot control circuit breaker to cause the latter to open, the improvement comprising means responsive to the manual closing and opening of said pilot control circuit breaker to initiate corresponding energization of one or the other of said set and trip coils and thereafter deenergize the same after electrically timed intervals.
Claim 2
Dependent Claim
116 words
In an electronic control for a remote control circuit breaker system in which a main circuit breaker is normally operated by energization of electromagnetic set and trip coils in response to the opening of a pilot control circuit breaker and in which overload trip-open of the main circuit breaker results in closure of overload trip contacts to initiate flow of a controlled current through the pilot control circuit breaker to cause the latter to open, the improvement comprising means responsive to the manual closing and opening of said pilot control circuit breaker to initiate corresponding energization of one or the other of said set and trip coils and thereafter deenergize the same after electrically timed intervals.
Claim 3
Dependent Claim
74 words
The combination according to claim 1 wherein said means comprises means for controlling the supply of D.C. energizing current to the set and trip coils in event of loss of main A.C. power, said last mentioned means being responsive to presence of normal AC power to block flow of DC energizing current, and being responsive to absence of normal AC voltage to make auxiliary DC power available to energize said set and trip coils.
Claim 4
Dependent Claim
58 words
The combination according to claim 1 wherein said means comprises first and second digital logic switching means, and first switching means responding to closure of said pilot control circuit breaker to initiate energization of said set coil, and said second switching means responding to opening of said pilot control circuit breaker to initiate energization of said trip coil.
Claim 5
Dependent Claim
40 words
The combination according to claim 3 wherein each of said switching means includes timing circuit means which cause each of the latter to switch to coil deenergizing states after a timed interval following its switching to the coil energizing state.
Claim 6
Dependent Claim
102 words
The combination according to claim 4 wherein said means further comprises third digital logic switching means and transistor means for controlling the supply of D.C. energizing current to the set and trip coils in the event of loss of main AC power, said third switching means being responsive to the presence of normal AC power to block conduction of said transistor means, and also being responsive to the absence of normal AC voltage to render said transistor means conductive to make auxiliary DC power available to energize said set and trip coils under the direction of said first and second switching means.
Claim 7
Dependent Claim
45 words
The combination according to claim 5 wherein said third digital logic switching means includes means responsive to action of said timing circuit means to provide coil deenergizing states to render said transistor means non-conducting to remove auxiliary DC power from said set and trip coils.
References Cited (Backward Citations)
US3211955A
Cited
US3706916A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-04 | 1978-05-06 | 1978-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-04 | 1982-05-06 | 1982-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-04 | 1986-05-06 | 1986-11-05 | $7700.00 | Window Closed / Lapsed |