US3930211A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit breaker
Assignee: Commander Electrical Equipment Inc
•
Filing: 1974-11-25
•
Granted: 1975-12-30
•
Expires: 1994-11-25
Abstract
Abstract Circuit breaker having a movable contact mounted on a contact carrier. The movable contact is rivet-shaped having a large section which includes a surface for making contact with a stationary contact and having a shank. The shank extends through an opening in the contact carrier so that the large section of the contact is on one side of the contact carrier and a portion of the shank extends to the other side of the contact carrier. A flexible copper conductor is welded directly to the portion of the shank on the other side of the contact carrier and is also connected to a thermostat element. Thus, the contact carrier is not an essential element in the conductive path between the movable contact and the thermostat element and, therefore, may be of a material which is non-conductive or of relatively low conductivity.
Inventors
- 👤 Harold E Belttary
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:18
CPC Classifications
H; H01; H01H; H01H1/00; H01H1/58; H01H1/5822
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
221 words
A circuit breaker including a stationary contact; a movable contact; a contact carrier having the movable contact mounted thereon; an operating mechanism for manually moving said contact carrier to selectively open and close said contacts; a load terminal; a tripping mechanism including a current responsive member in a conductive path between said movable contact and said load terminal for moving said contact carrier to open said contacts in response to a current overload condition through said current responsive member; a flexible conductor connected in the current path between said movable contact and said current responsive member; said flexible conductor being directly connected to said movable contact whereby said conductive path includes the movable contact and the flexible conductor, and said contact carrier is not an element directly in said conductive path; a region of the contact carrier having an opening therethrough between opposite sides of the contact carrier; said movable contact extending from one side of said contact carrier through said opening to the other side of said contact carrier; said movable contact being fixed to said contact carrier and having a contact surface on the one side of said contact carrier for engaging the stationary contact; and said movable contact having a surface in the direct fixed connection with said flexible conductor on the other side of said contact carrier.
Claim 2
Dependent Claim
221 words
A circuit breaker including a stationary contact; a movable contact; a contact carrier having the movable contact mounted thereon; an operating mechanism for manually moving said contact carrier to selectively open and close said contacts; a load terminal; a tripping mechanism including a current responsive member in a conductive path between said movable contact and said load terminal for moving said contact carrier to open said contacts in response to a current overload condition through said current responsive member; a flexible conductor connected in the current path between said movable contact and said current responsive member; said flexible conductor being directly connected to said movable contact whereby said conductive path includes the movable contact and the flexible conductor, and said contact carrier is not an element directly in said conductive path; a region of the contact carrier having an opening therethrough between opposite sides of the contact carrier; said movable contact extending from one side of said contact carrier through said opening to the other side of said contact carrier; said movable contact being fixed to said contact carrier and having a contact surface on the one side of said contact carrier for engaging the stationary contact; and said movable contact having a surface in the direct fixed connection with said flexible conductor on the other side of said contact carrier.
Claim 3
Dependent Claim
42 words
A circuit breaker in accordance with claim 1 wherein said movable contact is brazed to said contact carrier in the regin of said opening; and said flexible conductor is welded to said movable contact at said surface in direct fixed connection therewith.
Claim 4
Dependent Claim
40 words
A circuit breaker in accordance with claim 2 wherein said contact carrier is of steel; said movable contact includes silver and is brazed to the contact carrier with a brazing material including silver; and said flexible conductor is of copper.
Claim 5
Dependent Claim
101 words
A circuit breaker in accordance with claim 1 wherein said movable contact includes a portion disposed on the one side of said contact carrier and having said contact surface for engaging the stationary contact, and a shank fitting with said opening and extending therethrough to the other side of the contact carrier, the portion of the shank on the other side of the contact carrier being deformed to be larger than said opening thereby holding said movable contact fixed in said contact carrier; and said flexible conductor is welded to the deformed portion of said shank in direct fixed connection therewith.
Claim 6
Dependent Claim
51 words
A circuit breaker in accordance with claim 4 wherein said contact carrier is of steel; a region of said portion of the movable contact including said contact surface is of silver; said shank including the deformed portion is of copper or a copper alloy; and said flexible conductor is of copper.
References Cited (Backward Citations)
US2294838A
Cited
US3264427A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-29 | 1979-06-30 | 1979-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-29 | 1983-06-30 | 1983-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-29 | 1987-06-30 | 1987-12-30 | $7700.00 | Window Closed / Lapsed |