US4100592A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Projection lighting assembly and lamp unit for use therein
Assignee: GTE Sylvania Inc
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Filing: 1976-12-22
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Granted: 1978-07-11
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Expires: 1996-12-22
Abstract
Abstract A lamp unit for use within a socket which defines an opening having a pair of upstanding walls. The unit is especially adapted for use in projection applications, e.g. movie, slide, and microfilm projectors, and comprises a base which is positioned within the socket's opening, a reflector and electric lamp securedly positioned within the base in a coaxial relationship, and biasing means in the form of an elongated rib, two spaced protuberances, or a resilient spring, etc. located on one side of the base. Accordingly, the base is biased against one of the upstanding walls of the opening to provide an interference fit between base and socket and maintain consistent alignment of these components. A lighting assembly utilizing the above lamp unit is also disclosed.
Inventors
- 👤 Charles E. Henkel
- 👤 C. Daniel Holmes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:13
CPC Classifications
H; H01; H01R; H01R33/00; H01R33/05; H01R33/06; G; G03; G03B; G03B21/00; G03B21/14; G03B21/20
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
141 words
A projection lamp unit for use within an electrically insulative socket defining an opening therein having first and second spacedly positioned and parallel upstanding flat walls, said projection lamp unit comprising: a base member including a receptacle portion, and a boxlike seating portion for being positioned within said opening within said socket; a reflector securedly positioned within said receptacle portion of said base member; a projection lamp securedly positioned within said receptacle portion of said base member in a substantially coaxial relationship with said reflector; and biasing means located only on one side of said boxlike seating portion of said base member for positively engaging said first upstanding flat wall of said opening to bias said seating portion against said second upstanding flat wall and provide an interference fit between said seating portion and said upstanding flat walls of said socket.
Claim 2
Dependent Claim
141 words
A projection lamp unit for use within an electrically insulative socket defining an opening therein having first and second spacedly positioned and parallel upstanding flat walls, said projection lamp unit comprising: a base member including a receptacle portion, and a boxlike seating portion for being positioned within said opening within said socket; a reflector securedly positioned within said receptacle portion of said base member; a projection lamp securedly positioned within said receptacle portion of said base member in a substantially coaxial relationship with said reflector; and biasing means located only on one side of said boxlike seating portion of said base member for positively engaging said first upstanding flat wall of said opening to bias said seating portion against said second upstanding flat wall and provide an interference fit between said seating portion and said upstanding flat walls of said socket.
Claim 3
Dependent Claim
29 words
The lamp unit according to claim 1 wherein said biasing means comprises an elongated rib positioned substantially along the entire length of said side of said boxlike seating portion.
Claim 4
Dependent Claim
19 words
The lamp unit according to claim 1 wherein said biasing means comprises at least two spacedly-positioned protruding tip members.
Claim 5
Dependent Claim
13 words
The lamp unit according to claim 1 wherein said biasing means is resilient.
Claim 6
Dependent Claim
18 words
The lamp unit according to claim 4 wherein said biasing means comprises at least one elongated spring member.
Claim 7
Dependent Claim
30 words
The lamp unit according to claim 5 wherein the number of said elongated spring members is two, said spring members spacedly positioned from each other on said boxlike seating portion.
Claim 8
Dependent Claim
34 words
The lamp unit according to claim 1 wherein said boxlike seating portion comprises a metallic material and said socket comprises a plastic material, said biasing means forming an integral part of said seating portion.
Claim 9
Dependent Claim
47 words
The lamp unit according to claim 1 wherein said boxlike seating portion includes a lower flat surface which is adapted for resting flush on a flat surface of said socket and occupying a common plane therewith, said common plane parallel to the axis of said projection lamp.
Claim 10
Dependent Claim
140 words
A projection lighting assembly comprising: an electrically insulative socket defining an opening therein having first and second spacedly positioned and parallel upstanding flat walls; and a projection lamp unit comprising a base member including a receptacle portion, and a boxlike seating portion for being positioned within said opening within said socket, a reflector securedly positioned within said receptacle portion of said base member, a projection lamp securedly positioned within said receptacle portion of said base member in a substantially coaxial relationship with said reflector, and biasing means located only on one side of said boxlike seating portion of said base member for positively engaging said first upstanding flat wall of said opening to bias said seating portion against said second upstanding flat wall and provide an interference fit between said seating portion and said upstanding flat walls of said socket.
Claim 11
Dependent Claim
140 words
A projection lighting assembly comprising: an electrically insulative socket defining an opening therein having first and second spacedly positioned and parallel upstanding flat walls; and a projection lamp unit comprising a base member including a receptacle portion, and a boxlike seating portion for being positioned within said opening within said socket, a reflector securedly positioned within said receptacle portion of said base member, a projection lamp securedly positioned within said receptacle portion of said base member in a substantially coaxial relationship with said reflector, and biasing means located only on one side of said boxlike seating portion of said base member for positively engaging said first upstanding flat wall of said opening to bias said seating portion against said second upstanding flat wall and provide an interference fit between said seating portion and said upstanding flat walls of said socket.
Claim 12
Dependent Claim
29 words
The lighting assembly according to claim 9 wherein said biasing means comprises an elongated rib positioned substantially along the entire length of said side of said boxlike seating portion.
Claim 13
Dependent Claim
19 words
The lighting assembly according to claim 9 wherein said biasing means comprises at least two spacedly-positioned protruding tip members.
Claim 14
Dependent Claim
13 words
The lighting assembly according to claim 9 wherein said biasing means is resilient.
Claim 15
Dependent Claim
18 words
The lighting assembly according to claim 12 wherein said biasing means comprises at least one elongated spring member.
Claim 16
Dependent Claim
30 words
The lighting assembly according to claim 13 wherein the number of said elongated spring members is two, said spring members spacedly positioned from each other on said boxlike seating portion.
Claim 17
Dependent Claim
34 words
The lighting assembly according to claim 9 wherein said boxlike seating portion comprises a metallic material and said socket comprises a plastic material, said biasing means forming an integral part of said seating portion.
Claim 18
Dependent Claim
29 words
The lighting assembly according to claim 9 further including a clamping member pivotally oriented on said socket for engaging said base to positively clamp said base to said socket.
Claim 19
Dependent Claim
54 words
The lighting assembly according to claim 9 wherein said boxlike seating portion and said socket each include a flat surface, said flat surface of said boxlike seating portion resting flush on said flat surface of said socket and occupying a common plane therewith, said common plane parallel to the axis of said projection lamp.
Claim 20
Dependent Claim
22 words
The lamp unit according to claim 8 wherein said biasing means occupies an axis parallel to said axis of said projection lamp.
Claim 21
Dependent Claim
22 words
The lighting assembly according to claim 17 wherein said biasing means occupies an axis parallel to said axis of said projection lamp.
References Cited (Backward Citations)
US2110134A
Cited
US2117762A
Cited
US3069539A
Cited
US3176260A
Cited
US3639745A
Cited
GB1380083A
Cited
US4023893A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-07-10 | 1982-01-09 | 1982-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-10 | 1986-01-09 | 1986-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-10 | 1990-01-09 | 1990-07-11 | $7700.00 | Window Closed / Lapsed |