US4070570A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lighting apparatus
Assignee: General Energy Development Corp
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Filing: 1976-06-29
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Granted: 1978-01-24
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Expires: 1996-06-29
Abstract
Abstract A rugged lighting device that is preferably for use in explosive atmosphere such as on heavy coal mining equipment has a fluorescent lighting source that is readily replaceable without requiring disassembly of the device. The lighting apparatus is constructed to operate at a very efficient high output light level even over extended periods of operation and employs either a heat sinking technique for providing this efficient operation or preferably a very high output fluorescent tube designed for high temperature operation and having an amalgam patch. The apparatus basically comprises front and rear support structures interconnected by a transparent lamp tube, a lamp assembly slideably received by the lamp tube, and a cage mounted over the support structures for protecting the lamp assembly. The front support structure is constructed to receiving electrical wiring for the lamp assembly and comprises female connector means for mating with a male connector means of the lamp assembly. The rear support structure comprises a cap which may be removed to permit withdrawal of the lamp assembly. The lamp assembly comprises, in addition to a fluorescent lamp, mounting means for opposite ends of the lamp, a ground plane and, in one embodiment, heat sink means disposed at the rear end of the lamp assembly.
Inventors
- 👤 Harold B. Wetmore
- 👤 Robert A. Harrow
- 👤 William C. Holway
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:18
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/02; H01J61/50; F; F21; F21V; F21V15/00; F21V15/02; F21V19/00; F21V19/04; F21V25/00; F21V25/12
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
219 words
A lighting apparatus comprising; one and another spaced support structures each including a housing having a through passage defining in part a chamber in the housing, at least translucent tube means extending between the support structures and received thereby, connector means disposed in the chamber of said one support structure adjacent one end of said tube means, and a lamp assembly slideably received by the tube means, said lamp assembly comprising, a tubular fluorescent lamp, a pair of spaced lamp holders, a connector block at one end of the lamp assembly adjacent one of the holders, a ground plane extending longitudinally of the lamp in a direction between holders, a support block at the other end of the lamp assembly, means securing the ground plane at one end to the connector block and at the other end to the support block with the ground plane spaced only a slight distance from the lamp along its length, and means secured to said support block on the side thereof opposite said lamp to enable pulling of the lamp assembly from the tube, said passage in said other support structure having a minimum diameter greater than the maximum diameter of the lamp assembly so as to permit withdrawal of the lamp assembly, in toto, from the tube through said other support structure.
Claim 2
Dependent Claim
219 words
A lighting apparatus comprising; one and another spaced support structures each including a housing having a through passage defining in part a chamber in the housing, at least translucent tube means extending between the support structures and received thereby, connector means disposed in the chamber of said one support structure adjacent one end of said tube means, and a lamp assembly slideably received by the tube means, said lamp assembly comprising, a tubular fluorescent lamp, a pair of spaced lamp holders, a connector block at one end of the lamp assembly adjacent one of the holders, a ground plane extending longitudinally of the lamp in a direction between holders, a support block at the other end of the lamp assembly, means securing the ground plane at one end to the connector block and at the other end to the support block with the ground plane spaced only a slight distance from the lamp along its length, and means secured to said support block on the side thereof opposite said lamp to enable pulling of the lamp assembly from the tube, said passage in said other support structure having a minimum diameter greater than the maximum diameter of the lamp assembly so as to permit withdrawal of the lamp assembly, in toto, from the tube through said other support structure.
Claim 3
Dependent Claim
23 words
A lighting apparatus as set forth in claim 1 wherein said ground plane has an arcuate shape with channels for receiving electrical wiring.
Claim 4
Dependent Claim
30 words
A lighting apparatus as set forth in claim 1 wherein said lamp assembly comprises a heat sink shield extending over a part of the lamp opposite to the ground plane.
Claim 5
Dependent Claim
18 words
A lighting apparatus as set forth in claim 1 further comprising a mounting means for supporting each housing.
Claim 6
Dependent Claim
33 words
A lighting apparatus as set forth in claim 4 wherein the connector means in the one housing includes a female connector and the connector block of the lamp assembly includes a male connector.
Claim 7
Dependent Claim
22 words
A lighting apparatus as set forth in claim 4 including caps for sealing the outer ends of the passages in each housing.
Claim 8
Dependent Claim
26 words
A lighting apparatus as set forth in claim 4 wherein the one housing has an opening for receiving wiring for the connector means in the housing.
Claim 9
Dependent Claim
19 words
A lighting apparatus as set forth in claim 4 wherein each of the holding means includes spring loaded means.
Claim 10
Dependent Claim
34 words
A lighting apparatus as set forth in claim 4 wherein the other housing is constructed of a heat conductive material and has ridge or fin means for increasing the total outer surface area thereof.
Claim 11
Dependent Claim
20 words
A lighting apparatus as set forth in claim 1 wherein said tube is received in the passages of said housings.
Claim 12
Dependent Claim
21 words
A lighting apparatus as set forth in claim 4 including clamp means for securing each housing in its respective mounting means.
Claim 13
Dependent Claim
27 words
A lighting apparatus as set forth in claim 4 including a protective cage mounted from the mounting means and extending over the lamp assembly and support structures.
Claim 14
Dependent Claim
17 words
A lighting apparatus as set forth in claim 1 including a collar associated with each holding means.
Claim 15
Dependent Claim
25 words
A lighting apparatus as set forth in claim 13 including a heat sink shield covering the other end of the tube and contacting the collar.
Claim 16
Dependent Claim
43 words
A lighting apparatus as set forth in claim 1 wherein said lamp assembly comprises heat sink means at least a portion of which extends over the glass part of the tubular lamp for creating a cold spot to improve operation of the lamp.
Claim 17
Dependent Claim
26 words
A lighting apparatus as set forth in claim 1 wherein said tubular fluorescent lamp is a high light output lamp having an amalgam patch associated therewith.
Claim 18
Dependent Claim
30 words
A lighting apparatus as set forth in claim 16 wherein said amalgam patch is disposed at a central area of the fluorescent lamp intermediate the ends of the fluorescent lamp.
Claim 19
Dependent Claim
40 words
A lighting apparatus as set forth in claim 17 wherein said fluorescent lamp has a metallic reflector disposed about a portion of the circumference of the lamp with the amalgam patch disposed intermediate the reflector and the fluorescent lamp tube.
Claim 20
Dependent Claim
27 words
A lighting apparatus as set forth in claim 2 wherein said channels extend between the ends of the ground plane and are each parallel to one another.
Claim 21
Dependent Claim
45 words
A lighting apparatus as set forth in claim 3 including a collar about the holder at the other end of the lamp assembly, said collar disposed between the support block and shield and having elongated screws securing the shield and collar to the support block.
Claim 22
Dependent Claim
59 words
A lighting apparatus as set forth in claim 1 wherein said lamp assembly further comprises one and another collar with screw means for securing the one collar to the connector block and the other collar to the support block, said collars both extending about the lamp greater than 180° said ground plane extending about the lamp less than 180°.
Claim 23
Dependent Claim
21 words
A lighting apparatus as set forth in claim 21 wherein said collars each interlock at their ends with the ground plane.
Claim 24
Dependent Claim
32 words
A lighting apparatus as set forth in claim 1 wherein said means to enable pulling includes a loop and means orienting the loop to correspond with the position of the connector block.
References Cited (Backward Citations)
US2874270A
Cited
US2392202A
Cited
US2476856A
Cited
US2760053A
Cited
US3263111A
Cited
US3140054A
Cited
US3249749A
Cited
US3786247A
Cited
US3809944A
Cited
US3833801A
Cited
US3906284A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-01-23 | 1981-07-25 | 1982-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-23 | 1985-07-25 | 1986-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-23 | 1989-07-25 | 1990-01-24 | $7700.00 | Window Closed / Lapsed |