US3783215A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Positive on position indicator
Assignee: ITE Imperial Corp
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Filing: 1972-07-27
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Granted: 1974-01-01
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Expires: 1992-07-27
Abstract
Abstract A molded case circuit breaker having spring powered over-center toggle contact operating mechanisms is provided with means to prevent the operating handle from moving to its off position unless the contacts are open. This means may engage the toggle near the knee thereof to assist in driving the toggle over center during opening movement of the handle.
Inventors
- 👤 J Brumfield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:57
CPC Classifications
H; H01; H01H; H01H71/00; H01H71/10; H01H71/50; H01H71/501; Y; Y10; Y10S; Y10S200/00; Y10S200/42
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
264 words
A circuit breaker including cooperating contact means, an overcenter toggle mechanism for moving said contact means between open and closed positions, and a handle operable between circuit breaker ON and OFF positions corresponding to the respective open and closed positions of said contact means; said mechanism including toggle means operatively connected to said contact means, main spring means operatively connected to said toggle means to furnish opening and closing forces for said contact means, and an operating member connected to said handle and movable therewith to change the relative positions of the line of action of said means and the knee of said toggle means for driving the toggle means overcenter thereby opening and closing said contact means; pivoted lever means connected to said operating member and having a part cooperating with said toggle means to block movement of said lever means in a first direction until said toggle means is collapsed in a contact means opening direction; with movement of said lever means in a first direction being blocked by said toggle means, said lever means acting through said operating member restraining said handle from moving to its said OFF position; said mechanism also including a frame; one end of said lever means being pivotally mounted to fixed pivot means on said frame with the other end of said lever means being connected to said operating member so as to normally be movable thereby; said part of said lever means cooperating with said toggle means being disposed between said fixed pivot means and the connection between said lever means and said operating member.
Claim 2
Dependent Claim
264 words
A circuit breaker including cooperating contact means, an overcenter toggle mechanism for moving said contact means between open and closed positions, and a handle operable between circuit breaker ON and OFF positions corresponding to the respective open and closed positions of said contact means; said mechanism including toggle means operatively connected to said contact means, main spring means operatively connected to said toggle means to furnish opening and closing forces for said contact means, and an operating member connected to said handle and movable therewith to change the relative positions of the line of action of said means and the knee of said toggle means for driving the toggle means overcenter thereby opening and closing said contact means; pivoted lever means connected to said operating member and having a part cooperating with said toggle means to block movement of said lever means in a first direction until said toggle means is collapsed in a contact means opening direction; with movement of said lever means in a first direction being blocked by said toggle means, said lever means acting through said operating member restraining said handle from moving to its said OFF position; said mechanism also including a frame; one end of said lever means being pivotally mounted to fixed pivot means on said frame with the other end of said lever means being connected to said operating member so as to normally be movable thereby; said part of said lever means cooperating with said toggle means being disposed between said fixed pivot means and the connection between said lever means and said operating member.
Claim 3
Dependent Claim
51 words
A circuit breaker as set forth in claim 1 in which one end of the main spring means is connected to the operating member and the other end thereof is connected to the knee of the toggle means; said operating member being mounted to said frame on another fixed pivot means.
Claim 4
Dependent Claim
43 words
A circuit breaker as set forth in claim 1 in which the frame includes spaced side walls between which said toggle means is disposed; said lever means including first and second levers disposed adjacent to and movable parallel to the respective side walls.
Claim 5
Dependent Claim
58 words
A circuit breaker as set forth in claim 3 in which the operating member is generally of inverted U-shape having first and second arms connected at their upper ends by a web to which the main spring means is connected; said arms at their lower ends being mounted to the respective side walls on another fixed pivot means.
Claim 6
Dependent Claim
25 words
A circuit breaker as set forth in claim 4 in which the first and second levers are connected to the respective first and second arms.
Claim 7
Dependent Claim
22 words
A circuit breaker as set forth in claim 5 in which individual cooperating pin-slot means connect the levers to the respective arms.
Claim 8
Dependent Claim
33 words
A circuit breaker as set forth in claim 6 in which the levers are disposed outboard of said side walls and the side walls are disposed between the arms of the operating member.
Claim 9
Dependent Claim
36 words
A circuit breaker as set forth in claim 7 in which the ends of said levers connected to the arms of the operating member are interposed between said arms and the side walls of the frame.
Claim 10
Dependent Claim
42 words
A circuit breaker as set forth in claim 8 in which the connection between each of the first and second levers and the respective first aNd second arms includes a pin extending outward from the lever into a slot in the arm.
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) | 1976-12-31 | 1977-07-02 | 1978-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-31 | 1981-07-02 | 1982-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-31 | 1985-07-02 | 1986-01-01 | $7700.00 | Window Closed / Lapsed |