EP0061750A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Projection unit including glass reflector with insulative cap member
Assignee: Osram Sylvania Inc
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Filing: 1982-03-26
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Granted: —
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Expires: 2002-03-26
Abstract
Abstract An improved projection unit including a glass reflector having a forward reflecting portion which includes an internal substantially concave reflecting surface and an apex portion with an opening therein. An incandescent lamp is oriented such that its envelope portion is arranged relative to the reflecting surface of the reflector and its sealed end portion having a pair of spaced apart lead-in wires projecting therefrom is arranged within the reflector's opening. An electrically insulative cap member is fixedly secured to an external surface of a glass reflector immediately adjacent the reflector's rear opening. The cap member includes a pair of contacts spacedly located therein, each of these contacts being joined electrically to a respective one of the projecting lead-in wires from the incandescent lamp. In a further embodiment of the invention, a holder is provided for providing electrical connection between the projection system's circuitry and the incandescent lamp.
Inventors
- 👤 Ronald G. Blaisdell
- 👤 Harold L. Hough
- 👤 Richard B. Martenson
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 12:25
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/14; G03B21/20; G03B21/2006; G03B21/202
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
177 words
1 . In a projection unit including a glass reflector having a forward reflecting portion including an internal, substantially concave reflecting surface and an apex portion having an opening therein, and an incandescent lamp including an envelope portion having a filament structure therein and a sealed end portion adjacent said envelope portion and including a pair of spaced-apart lead-in wires projecting therefrom, said' incandescent lamp posi- t ioned within said glass reflector such that said envelope portion of said lamp is located substantially within said forward reflecting portion relative to said concave reflecting surface, and said sealed end portion of said lamp is located substantially within said rear opening within said apex portion, the improvement comprising: , an electrically insulative cap member fixedly secured to an external surface of said glass reflector immediately adjacent said opening within said apex portion, said cap member including a pair of electrical contacts spacedly located therein, each of said electrical contacts electrically connected to a respective one of said lead-in wires projecting from said sealed end portion of said incandescent lamp.
Claim 2
Dependent Claim
177 words
1 . In a projection unit including a glass reflector having a forward reflecting portion including an internal, substantially concave reflecting surface and an apex portion having an opening therein, and an incandescent lamp including an envelope portion having a filament structure therein and a sealed end portion adjacent said envelope portion and including a pair of spaced-apart lead-in wires projecting therefrom, said' incandescent lamp posi- t ioned within said glass reflector such that said envelope portion of said lamp is located substantially within said forward reflecting portion relative to said concave reflecting surface, and said sealed end portion of said lamp is located substantially within said rear opening within said apex portion, the improvement comprising: , an electrically insulative cap member fixedly secured to an external surface of said glass reflector immediately adjacent said opening within said apex portion, said cap member including a pair of electrical contacts spacedly located therein, each of said electrical contacts electrically connected to a respective one of said lead-in wires projecting from said sealed end portion of said incandescent lamp.
Claim 3
Dependent Claim
17 words
The improvement according to Claim 1 wherein said electrically insulative material of said cap member is plastic.
Claim 4
Dependent Claim
13 words
The improvement according to Claim 2 wherein said plastic material is polyphenylene sulfide.
Claim 5
Dependent Claim
20 words
4 . The improvement according to Claim 1 wherein said -electrically insulative material of said cap member is ceramic. ,
Claim 6
Dependent Claim
83 words
5 . The improvement according to Claim 1 wherein said electrical contacts are spacedly positioned within said cap member on opposite sides thereof, said cap member further including a pair of slots located therein, each of said slots located within a respective one of said opposite sides adjacent a respective one of said electrical contacts, each of said lead-in wires projecting from said sealed end portion of said lamp being connected to said respective one of said contacts through one of said slots.
Claim 7
Dependent Claim
58 words
The improvement according to Claim 1 further including a holder member, said glass reflector and cap member postioned within said holder member, said holder member including a pair of spaced-apart contacts, each of said contacts electrically engaging a respective one of said contacts located within said cap member when said cap member is positioned within said holder member.
Claim 8
Dependent Claim
51 words
7 . The improvement according to Claim 6 wherein said holder member includes an upstanding, substantially planar faceplate portion defining a channel therein and said glass reflector includes a substantially planar forward rim portion, said rim portion slidably located within said channel when said reflector is positioned within said holder member.
Claim 9
Dependent Claim
60 words
The improvement according to Claim 7 wherein each of said contacts within said holder exerts a biasing force against each respective one of said contacts within said insulative cap member when said cap member is positioned within said holder member, said force in turn biasing said rim portion of said glass reflector against said faceplate portion of said holder member.
Claim 10
Dependent Claim
37 words
The improvement according to Claim 6 wherein said holder member includes a rear upstanding portion defining a receiving slot therein, said insulative cap member further including means thereon for aligning said cap member within said receiving slot.
Claim 11
Dependent Claim
35 words
The improvement according to claim 9 wherein said aligning means comprises at least one thin, elongated fin, said fin being inserted within said receiving slot when said cap member is positioned within said holder member.
Claim 12
Dependent Claim
27 words
The improvement according to Claim 10 wherein the number of saio fins is two, each of said fins extending from said cap member on opposing sides thereof.
References Cited (Backward Citations)
No citation records indexed.
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