Patent US3737819A successfully refreshed from Google Patents.
US3737819A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control device for auxiliary circuit breaker switches
Assignee: Cegelec SA
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Filing: 1972-01-10
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Granted: 1973-06-05
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Expires: 1992-01-10
Abstract
Abstract Control for auxiliary switches on circuit breakers wherein the control is placed so that it will be dependent on the detection of an appreciable current in a conductor of the circuit of an auxiliary switch of the circuit breaker.
Inventors
- 👤 E Thuries
- 👤 F Joly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:38
CPC Classifications
H; H01; H01H; H01H33/00; H01H33/02; H01H33/28; H01H33/285; H01H33/04; H01H33/16; H01H33/30; H01H33/32
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
68 words
In a control device for opening an auxiliary switch of a circuit breaker having a stationary contact and a mobile contact, the improvement comprising: a detection coil within a magnetic circuit around one of said contacts with said detection coil presenting a low inductance in the circuit of the auxiliary switch, and means responsive to induced current within said detection coil for causing the opening of said contacts.
Claim 2
Dependent Claim
68 words
In a control device for opening an auxiliary switch of a circuit breaker having a stationary contact and a mobile contact, the improvement comprising: a detection coil within a magnetic circuit around one of said contacts with said detection coil presenting a low inductance in the circuit of the auxiliary switch, and means responsive to induced current within said detection coil for causing the opening of said contacts.
Claim 3
Dependent Claim
30 words
The device according to claim 1, wherein: said coil supplies an electric valve which acts indirectly on a piston which is unitary with the mobile contact of the auxiliary switch.
Claim 4
Dependent Claim
30 words
The device according to claim 1, wherein: said coil supplies an electric valve which acts directly upon a piston which is unitary with the mobile contact of the auxiliary switch.
Claim 5
Dependent Claim
32 words
The device according to claim 1 above, wherein: said detection coil supplies a second coil which releases a locking device that is used to keep the auxiliary switch in the closed position.
Claim 6
Dependent Claim
25 words
The device according to claim 1, wherein: said detection coil directly causes the opening of an auxiliary switch through electrodynamic action, on said mobile contact.
Claim 7
Dependent Claim
128 words
In a control device for opening an auxiliary switch of a circuit breaker having a stationary contact and mobile contact, the improvement comprising: a detection coil of low self-inductance arranged in series, for exerting the electrodynamic force necessary for the opening of the auxiliary switch, said detection coil consisting of at least two windings, each carried by a support and arranged so that the passage of an appreciable current in the coil will cause forces between the winding supports, one of said supports being fixed and another of said supports being connected to a device for opening the auxiliary switch, said supports being made up of plates arranged face to face, with each coil winding constituting a conductor arranged in zig zag fashion on one of said plates.
Claim 8
Dependent Claim
128 words
In a control device for opening an auxiliary switch of a circuit breaker having a stationary contact and mobile contact, the improvement comprising: a detection coil of low self-inductance arranged in series, for exerting the electrodynamic force necessary for the opening of the auxiliary switch, said detection coil consisting of at least two windings, each carried by a support and arranged so that the passage of an appreciable current in the coil will cause forces between the winding supports, one of said supports being fixed and another of said supports being connected to a device for opening the auxiliary switch, said supports being made up of plates arranged face to face, with each coil winding constituting a conductor arranged in zig zag fashion on one of said plates.
Claim 9
Dependent Claim
47 words
The device according to claim 6, wherein: said coil lies between a fixed plate and a plate connected to a device for the opening of the auxiliary switch and further includes at least one intermediate plate which carries a winding on each one of its two faces.
Claim 10
Dependent Claim
41 words
The device according to claim 6, further comprising compressed fluid means for opening the auxiliary switch simultaneously to cause the separation of the contacts of this switch and the opening of a valve that speeds up the separation of the contacts.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-04 | 1976-12-04 | 1977-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-04 | 1980-12-04 | 1981-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-04 | 1984-12-04 | 1985-06-05 | $7700.00 | Window Closed / Lapsed |