Patent US3960426A successfully refreshed from Google Patents.
US3960426A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical installation
Assignee: CONCORD LIGHTING Ltd
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Filing: 1975-09-24
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Granted: 1976-06-01
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Expires: 1995-09-24
Abstract
Abstract A power take-off adaptor for a continuous outlet electrical supply installation has separate and independently manually rotatable shafts for operating contact fingers and mechanical fixing means respectively. The shafts have interengaging radial cam formations which prevent operation of the contact fingers except when the mechanical fixing means is operative.
Inventors
- 👤 Robert Heritage
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:38
CPC Classifications
H; H01; H01R; H01R25/00; H01R25/14; H01R25/142; F; F21; F21V; F21V21/00; F21V21/34; F21V21/35
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
120 words
For use with an electrical current supply installation of the continuous outlet type comprising a channel-section track member having spaced parallel conductors extending longitudinally within said track member; a power take off adaptor comprising a housing, contact finger means movably mounted on said housing for movement between operative and inoperative positions, mechanical fixing means mounted on said housing operable to secure said housing to said track member, first and second rotary members independently and manually rotatable to operate said contact finger means and said mechanical fixing means respectively, and respective mutually interengageable portions on said first and second rotary members which interlock to prevent rotation of said first rotary member when said second rotary member is in an inoperative position.
Claim 2
Dependent Claim
120 words
For use with an electrical current supply installation of the continuous outlet type comprising a channel-section track member having spaced parallel conductors extending longitudinally within said track member; a power take off adaptor comprising a housing, contact finger means movably mounted on said housing for movement between operative and inoperative positions, mechanical fixing means mounted on said housing operable to secure said housing to said track member, first and second rotary members independently and manually rotatable to operate said contact finger means and said mechanical fixing means respectively, and respective mutually interengageable portions on said first and second rotary members which interlock to prevent rotation of said first rotary member when said second rotary member is in an inoperative position.
Claim 3
Dependent Claim
31 words
An adaptor as claimed in claim 1, wherein said first and second rotary members are parallel with each other and said interengageable portions comprise respective radial cam means on said members.
Claim 4
Dependent Claim
54 words
An adaptor as claimed in claim 2, wherein said first and second rotary members extend through a wall of said housing which wall is spaced from said track member in use of the adaptor, and said cam portions are disposed outside said housing so as to be visible to a user of said adaptor.
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) | 1979-06-01 | 1979-12-01 | 1980-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-01 | 1983-12-01 | 1984-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-01 | 1987-12-01 | 1988-06-01 | $7700.00 | Window Closed / Lapsed |