US4443778A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adapter for a low-voltage lamp
Assignee: US Philips Corp
•
Filing: 1982-07-02
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Granted: 1984-04-17
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Expires: 2002-07-02
Abstract
Abstract An adaptor for the connection of a low-voltage lamp to mains voltage has a housing with an assembly member which has a flange and a tubular part. The tubular part projects through an aperture in the housing and is connected to a lamp cap. The lamp cap and the flange retain the housing in position. A ring core transformer is present in the housing around the tubular part. The assembly member bears a lamp holder for a low voltage lamp.
Inventors
- 👤 Jan A. C. Mewissen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:54
CPC Classifications
H; H01; H01R; H01R33/00; H01R33/94; F; F21; F21V; F21V23/00; F21V23/02
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
181 words
An adaptor for a low-voltage lamp comprising a housing having at one end a lamp cap for connecting the adaptor to a line voltage lamp holder, and also comprising a lamp holder for a low-voltage lamp, in which housing a transformer is incorporated, the primary of which is connected to the lamp cap by current conductors and the secondary of which is connected to the lamp holder by current conductors, characterized in that the transformer is a ring core transformer and that an assembly member is provided which has a tubular part and an integral flange at one end, which assembly member carries the lamp holder and is partly contained in the housing, the tubular part of which assembly member is surrounded by the transformer and at its end remote from the flange projects through an aperture in the housing and is there secured to the lamp cap, the flange of the assembly member bearing against the housing in the longitudinal direction of the tubular part so that the housing is retained in position by the lamp cap and the flange.
Claim 2
Dependent Claim
181 words
An adaptor for a low-voltage lamp comprising a housing having at one end a lamp cap for connecting the adaptor to a line voltage lamp holder, and also comprising a lamp holder for a low-voltage lamp, in which housing a transformer is incorporated, the primary of which is connected to the lamp cap by current conductors and the secondary of which is connected to the lamp holder by current conductors, characterized in that the transformer is a ring core transformer and that an assembly member is provided which has a tubular part and an integral flange at one end, which assembly member carries the lamp holder and is partly contained in the housing, the tubular part of which assembly member is surrounded by the transformer and at its end remote from the flange projects through an aperture in the housing and is there secured to the lamp cap, the flange of the assembly member bearing against the housing in the longitudinal direction of the tubular part so that the housing is retained in position by the lamp cap and the flange.
Claim 3
Dependent Claim
24 words
An adaptor as claimed in claim 1, wherein the lamp cap is screwed to the end of the tubular part projecting from the housing.
Claim 4
Dependent Claim
20 words
An adaptor as claimed in claim 1, wherein the flange of the assembly member is present partly outside the housing.
Claim 5
Dependent Claim
19 words
An adaptor as claimed in claim 3, wherein means are provided to center the housing relative to the flange.
Claim 6
Dependent Claim
21 words
An adaptor as claimed in claim 1, wherein the lamp holder is recessed in the tubular part of the assembly member.
Claim 7
Dependent Claim
24 words
An adaptor as claimed in claim 5, wherein the lamp holder has a flange which is attached to the flange of the assembly member.
Claim 8
Dependent Claim
22 words
An adaptor as claimed in claim 1, wherein the flange of the assembly member has a collar to receive a screening cap.
Claim 9
Dependent Claim
24 words
An adaptor as claimed in claim 7, wherein the collar has means arranged to form a coupling together with means on a screening cap.
Claim 10
Dependent Claim
32 words
An adaptor as claimed in any of the preceding claims, characterized in that the tubular part of the assembly member has an aperture in its wall through which current conductors are passed.
References Cited (Backward Citations)
US1005163A
Cited
US1274380A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-04-17 | 1987-10-17 | 1988-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-17 | 1991-10-17 | 1992-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-17 | 1995-10-17 | 1996-04-17 | $7700.00 | Window Closed / Lapsed |