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Patent US5973585A successfully refreshed from Google Patents.
US5973585A
Expired / Lapsed
US
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Overcurrent trip for circuit breakers
Assignee: Individual
•
Filing: 1998-11-17
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Granted: 1999-10-26
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Expires: 2018-11-17
Abstract
Abstract An overcurrent trip (1) for circuit breakers or motor safety switches has a very short reaction time. The short reaction time is achieved by connecting a bimetal snap-action disk (8) to the heating device (7) in such a way that its central region is always in contact with the heating device (7), irrespective of creeping movement. This heating device (7) is formed by a ferromagnetic core (5) on which the magnet winding (12) is directly fitted, without a further yoke, which magnetic winding simultaneously serves as the heating winding. The bimetal snap-action disk (8) is held on this heating device (7) with the aid of the electromagnetically actuated rod (21), while a plunger (43) which coaxially surrounds the electromagnetically actuated rod is moved by the bimetal snap-action disk (8).
Inventors
- 👤 Hans Arnhold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:41
CPC Classifications
H; H01; H01H; H01H71/00; H01H71/10; H01H71/12; H01H71/40; H01H2071/407
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
217 words
An overcurrent trip (1) for electric safety switches, in particular circuit breakers or motor safety switches, having a base body (5) which has a convexly curved end face (12), having an electrical heating winding (7) which is situated on the base body (5) and is designed to have the current which is to be monitored flowing through it, having a bimetal snap-action disk (8) which has an edge (19) and has two temperature-dependent curvature states, which are such that, in the cold state, the disk is curved concavely on one flat side (17), and, in the hot state, the disk is curved convexly on this flat side (17), and the central region of which disk is held so as to bear against the end face (12) of the base body (5), in such a manner that its flat side (17), which is concave in the cold state, faces the end side (12) of the base body (5) while the edge (19) of the bimetal snap-action disk (8) is freely movable, having a holding member (21) by means of which the bimetal snap-action disk (8) is held so as to bear against the base body (5), and having a trip member (43) which is designed to interact with the edge region (19) of the bimetal snap-action disk (8).
Claim 2
Dependent Claim
217 words
An overcurrent trip (1) for electric safety switches, in particular circuit breakers or motor safety switches, having a base body (5) which has a convexly curved end face (12), having an electrical heating winding (7) which is situated on the base body (5) and is designed to have the current which is to be monitored flowing through it, having a bimetal snap-action disk (8) which has an edge (19) and has two temperature-dependent curvature states, which are such that, in the cold state, the disk is curved concavely on one flat side (17), and, in the hot state, the disk is curved convexly on this flat side (17), and the central region of which disk is held so as to bear against the end face (12) of the base body (5), in such a manner that its flat side (17), which is concave in the cold state, faces the end side (12) of the base body (5) while the edge (19) of the bimetal snap-action disk (8) is freely movable, having a holding member (21) by means of which the bimetal snap-action disk (8) is held so as to bear against the base body (5), and having a trip member (43) which is designed to interact with the edge region (19) of the bimetal snap-action disk (8).
Claim 3
Dependent Claim
16 words
The overcurrent trip as claimed in claim 1, wherein the bimetal snap-action disk (8) is circular.
Claim 4
Dependent Claim
42 words
The overcurrent trip as claimed in claim 1, wherein the trip member (43) is cup-shaped and has a collar (44) and a base, the collar (44) of said trip member bearing against the edge region (19) of the bimetal snap-action disk (8).
Claim 5
Dependent Claim
18 words
The overcurrent trip as claimed in claim 1, wherein the trip member (43) bears an actuation extension (45).
Claim 6
Dependent Claim
33 words
The overcurrent trip as claimed in claim 4, wherein the actuation extension (45) is arranged on the base of the trip member (43) and points in the opposite direction from the collar (44).
Claim 7
Dependent Claim
16 words
The overcurrent trip as claimed in claim 4, wherein the trip member (43) is rotationally symmetrical.
Claim 8
Dependent Claim
15 words
The overcurrent trip as claimed in claim 5, wherein the actuation extension (45) is tubular.
Claim 9
Dependent Claim
25 words
The overcurrent trip as claimed in claim 1, wherein a guide device (33) for the trip member (43) is connected to the base body (5).
Claim 10
Dependent Claim
15 words
The overcurrent trip as claimed in claim 1, wherein the base body (5) is ferromagnetic.
Claim 11
Dependent Claim
17 words
The overcurrent trip as claimed in claim 1, wherein the heating winding (7) forms a magnetic winding.
Claim 12
Dependent Claim
29 words
The overcurrent trip as claimed in claim 1, wherein the base body (5) contains a bore (16) in which a rod (21) is guided in a longitudinally displaceable manner.
Claim 13
Dependent Claim
19 words
The overcurrent trip as claimed in claim 11, wherein the rod (21) passes through the bimetal snap-action disk (8).
Claim 14
Dependent Claim
16 words
The overcurrent trip as claimed in claim 11, wherein the rod (21) forms the holding member.
Claim 15
Dependent Claim
16 words
The overcurrent trip as claimed in claim 11, wherein the rod (21) has a shoulder (22).
Claim 16
Dependent Claim
19 words
The overcurrent trip as claimed in claim 11, wherein the rod (21) is connected to a ferromagnetic armature (6).
Claim 17
Dependent Claim
27 words
The overcurrent trip as claimed in claim 11, wherein the rod (21) is preloaded against the bimetal snap-action disk (8) in the direction towards the bearing contact.
Claim 18
Dependent Claim
16 words
The overcurrent trip as claimed in claim 1, wherein the trip member (43) is freely movable.
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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) | 2002-10-25 | 2003-04-26 | 2003-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-10-25 | 2007-04-26 | 2007-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-10-25 | 2011-04-26 | 2011-10-26 | $7700.00 | Window Closed / Lapsed |