US4477863A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Work-light
Assignee: Individual
•
Filing: 1983-02-25
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Granted: 1984-10-16
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Expires: 2003-02-25
Abstract
Abstract A work light comprising a housing, a gas discharge lamp of the fluorescent type positioned inside a portion of said housing, means defining a compartment which is an extension of said portion of said housing, and a smoothing choke and a rectifier including a voltage multiplier circuit mounted in the compartment. The compartment and the portion of the housing are aligned with each other along the longitudinal axis of the housing. An electrical power supply cable is connected to the housing in series with an electric switch, and a swivel arm is mounted on the housing, the power supply cable extending through the swivel arm.
Inventors
- 👤 Alfred Walz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:35
CPC Classifications
F; F21; F21V; F21V23/00; F21S; F21S8/00; F21Y; F21Y2103/00
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
55 words
A work light comprising a housing, a gas discharge lamp positioned inside a portion of said housing, a power supply cable connected to said housing, means defining a compartment which is an extension of said portion of said housing, and a smoothing choke and a rectifier including a voltage multiplier circuit mounted in said compartment.
Claim 2
Dependent Claim
55 words
A work light comprising a housing, a gas discharge lamp positioned inside a portion of said housing, a power supply cable connected to said housing, means defining a compartment which is an extension of said portion of said housing, and a smoothing choke and a rectifier including a voltage multiplier circuit mounted in said compartment.
Claim 3
Dependent Claim
24 words
A work light according to claim 1, wherein the rectifier is mounted on a circuit panel arranged between U-shaped flanges of a supporting plate.
Claim 4
Dependent Claim
30 words
A work light according to claim 1, wherein the internal walls of the housing are covered with a reflective metallic coating, especially in the region of the gas discharge lamp.
Claim 5
Dependent Claim
26 words
A work light according to claim 3, wherein the reflective coating is connected to a power supply plug a ground lead in the power supply cable.
Claim 6
Dependent Claim
29 words
A work light according to claim 1, wherein a U-shaped supporting member for the smoothing choke and rectifier is provided in said compartment, substantially parallel to the housing wall.
Claim 7
Dependent Claim
21 words
A work light according to claim 5, wherein the U-shaped supporting member is attached to the housing by deformed plastics rivets.
Claim 8
Dependent Claim
27 words
A work light according to claim 1, wherein the cover is connected to the U-shaped supporting member by lugs in one engaging in apertures in the other.
Claim 9
Dependent Claim
25 words
A work light according to claim 1, wherein the gas discharge lamp has a fluorescent layer emitting light corresponding to daylight, and a gas filling.
Claim 10
Dependent Claim
23 words
A work light according to claim 1, wherein two or four gas discharge lamps are arranged geometrically parallel in pairs in the housing.
Claim 11
Dependent Claim
34 words
A work light according to claim 1, wherein a lift-off device for the gas discharge lamp(s) is provided in the bottom of the housing in the region of a side wall of the cover.
Claim 12
Dependent Claim
16 words
A work light as defined in claim 1 comprising a swivel arm mounted on said housing.
Claim 13
Dependent Claim
20 words
A work light as defined in claim 1 comprising an electric switch connected in series with said power supply cable.
Claim 14
Dependent Claim
23 words
A work light as defined in claim 11, in which said swivel arm is mounted on said housing by means of a balljoint.
Claim 15
Dependent Claim
14 words
A work light as defined in claim 1 comprising a cover for said compartment.
Claim 16
Dependent Claim
19 words
A work light as defined in claim 11 in which said power supply cable extends through said swivel arm.
Claim 17
Dependent Claim
30 words
A work light as defined in claim 1 in which said compartment and said portion of said housing are aligned with each other along the longitudinal axis of said housing.
References Cited (Backward Citations)
US4053811A
Cited
US4287456A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-10-16 | 1988-04-16 | 1988-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-16 | 1992-04-16 | 1992-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-16 | 1996-04-16 | 1996-10-16 | $7700.00 | Window Closed / Lapsed |