US3749873A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit breaker housing
Assignee: Airpax Electronics Inc
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Filing: 1971-08-18
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Granted: 1973-07-31
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Expires: 1991-08-18
Abstract
Abstract Disclosed is an electrical circuit breaker having an improved case construction. The case comprises three principal elements made of suitable thermoplastic and snapped together without separate fasteners or adhesive, namely, a rocker actuator, a housing, and a base. The actuator may be provided with a light and one or more of the plastic elements may be suitably colored. A removable auxiliary terminal plug is provided in the base and the terminals are retained by turned-over tabs after insertion.
Inventors
- 👤 G Harper
- 👤 J Shand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:17
CPC Classifications
H; H01; H01H; H01H71/00; H01H71/02; H01H71/0264; H01H71/0207; H01H71/0214
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
83 words
In an electromagnetic circuit breaker, a case comprising a thermoplastic housing, a thermoplastic base, resilient fastening means on said base and said housing joining them together, a toggle bar in said case, and a rocker actuator pivoted to said housing, said actuator having inner ends engaging said toggle bar, said base being provided with a pair of main terminals and an aperture between said terminals, and a plug extending through said aperture and having a flange overlying the inner surface of said base.
Claim 2
Dependent Claim
83 words
In an electromagnetic circuit breaker, a case comprising a thermoplastic housing, a thermoplastic base, resilient fastening means on said base and said housing joining them together, a toggle bar in said case, and a rocker actuator pivoted to said housing, said actuator having inner ends engaging said toggle bar, said base being provided with a pair of main terminals and an aperture between said terminals, and a plug extending through said aperture and having a flange overlying the inner surface of said base.
Claim 3
Dependent Claim
28 words
A circuit breaker according to claim 1 including a frame in said case, said plug flange being clamped between said frame and the interior surface of said base.
Claim 4
Dependent Claim
93 words
In an electromagnetic circuit breaker, a case comprising a thermoplastic housing, a thermoplastic base, a resilient fastening means on said base and housing joining them together, a toggle bar in said case, a rocker actuator pivoted to said housing, said actuator having its inner end engaging said toggle bar, said actuator comprising a pair of handle portions joined to a pair of spaced legs, the ends of said legs having slots receiving said toggle bar, and including a pair of projections on said housing, said actuator including L-shaped grooves slidably receiving said projections.
Claim 5
Dependent Claim
93 words
In an electromagnetic circuit breaker, a case comprising a thermoplastic housing, a thermoplastic base, a resilient fastening means on said base and housing joining them together, a toggle bar in said case, a rocker actuator pivoted to said housing, said actuator having its inner end engaging said toggle bar, said actuator comprising a pair of handle portions joined to a pair of spaced legs, the ends of said legs having slots receiving said toggle bar, and including a pair of projections on said housing, said actuator including L-shaped grooves slidably receiving said projections.
Claim 6
Dependent Claim
17 words
A circuit breaker according to claim 3 wherein said projections are semicylindrical with flats on one side.
Claim 7
Dependent Claim
33 words
A circuit breaker according to claim 3 wherein said grooves have first portions extending fRom said housing projections toward said slots, and second perpendicular portions terminating at a side edge of said legs.
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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) | 1976-07-30 | 1977-01-29 | 1977-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-30 | 1981-01-29 | 1981-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-30 | 1985-01-29 | 1985-07-31 | $7700.00 | Window Closed / Lapsed |