Patent US3573543A successfully refreshed from Google Patents.
US3573543A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable light intensity lamp socket having semiconductor mounted on heat sink thermally isolated from lamp base
Assignee: MELVYN B GRINDSTAFF
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Filing: 1969-02-10
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Granted: 1971-04-06
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Expires: 1989-02-10
Abstract
Abstract A solid state controllable current conducting semiconductor of a variable light intensity control circuit is mounted on a heat sink member which is positioned adjacent one end of an electrically and thermally insulating support member. The opposite end of the support member is secured to the insulating disc at the base of the lamp receiving shell of the lamp socket. The heat sink member is shaped to provide structural support and to increase the surface area thereof.
Inventors
- 👤 Melvyn B Grindstaff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:34
CPC Classifications
H; H05; H05B; H05B39/00; H05B39/04; H05B39/08; H01; H01R; H01R33/00; H01R33/945; H01R33/9453; Y; Y10; Y10S; Y10S323/00; Y10S323/905
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
98 words
A variable light intensity socket in accordance with claim 1 wherein said metal member further comprises a flange depending from at least the end portions of the curve periphery of said planar member and contacting the adjacent surface of said support member, at least one inverted U-shaped ridge formed in said planar member and extending substantially perpendicularly to said support member and in contact therewith, said at least one ridge being on the surface of said planar member opposite to that of said flange to provide support for said planar member against bending relative to said support member.
Claim 2
Dependent Claim
76 words
A variable light intensity socket in accordance with claim 2 further comprising an electrically conductive L-shaped angle bar, means for fastening one side of said angle bar to the end of said support member which is adjacent to said base member, means for fastening the other side of said angle bar through said base member to said shell, the exposed surface area of said angle bar being small compared to the area of said base member.
Claim 3
Dependent Claim
20 words
A variable light intensity socket in accordance with claim 3 wherein said semiconductor is a controllable bidirectional current conducting semiconductor.
Claim 4
Dependent Claim
34 words
A variable light intensity socket in accordance with claim 1 wherein said circuit means comprises a printed circuit formed on one side of said support member, and circuit elements mounted on said support member.
Claim 5
Dependent Claim
43 words
A variable light intensity socket in accordance with claim 5 wherein said circuit means further comprises a radio frequency filter network including an inductance, said inductance being mounted on said support member adjacent said base member and remote from said heat sink member.
Claim 6
Dependent Claim
76 words
A variable light intensity socket in accordance with claim 1 further comprising an electrically conductive L-shaped angle bar, means for fastening one side of said angle bar to the end of said support member which is adjacent to said base member, means for fastening the other side of said angle bar through said base member to said shell, the exposed surface area of said angle bar being small compared to the area of said base member.
Claim 7
Dependent Claim
20 words
A variable light intensity socket in accordance with claim 1 wherein said semiconductor is a controllable bidirectional current conducting semiconductor.
References Cited (Backward Citations)
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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) | 1974-04-05 | 1974-10-05 | 1975-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-05 | 1978-10-05 | 1979-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-05 | 1982-10-05 | 1983-04-06 | $7700.00 | Window Closed / Lapsed |