US3892960A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light projector fittings
Assignee: Rotaflex Great Britain Ltd
•
Filing: 1974-04-03
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Granted: 1975-07-01
•
Expires: 1994-04-03
Abstract
Abstract A modular light fitting system is based on a common lamp housing having an elliptical reflector and a parabolic reflector removably mounted in front of the elliptical reflector. Extension rods may be releasably secured to the housing to mount an interchangeable range of supplementary fittings such as a barndoor fitting for use with the parabolic reflector and a framing projector unit, colour change unit and lenses for use with the elliptical reflector.
Inventors
- 👤 Robert Heritage
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:34
CPC Classifications
F; F21; F21V; F21V17/00; F21V17/10; F21V17/12; F21V21/00; F21V21/14; F21V21/30; F21W; F21W2131/00; F21W2131/40; F21W2131/406
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
78 words
A light projector comprising a lamp housing having a body, a source of light, an elliptical reflector, a parabolic reflector, means for mounting said reflectors on said body, at least one of said reflectors being removable from said body, and mounting means permitting the support of supplementary fittings on said body, said mounting means comprising a plurality of extension rods releasably securable to said body to project forwardly therefrom parallel with the common optical axis of said reflectors.
Claim 2
Dependent Claim
78 words
A light projector comprising a lamp housing having a body, a source of light, an elliptical reflector, a parabolic reflector, means for mounting said reflectors on said body, at least one of said reflectors being removable from said body, and mounting means permitting the support of supplementary fittings on said body, said mounting means comprising a plurality of extension rods releasably securable to said body to project forwardly therefrom parallel with the common optical axis of said reflectors.
Claim 3
Dependent Claim
46 words
A light projector according to claim 1 wherein both said reflectors are adapted for concurrent mounting on said body, with one said reflector in its operative position being located within and shielding the other said reflector, which is rendered operative by removal of said one refleCtor.
Claim 4
Dependent Claim
24 words
A light projector according to claim 1, further comprising a range of supplementary fittings which are adapted for interchangeable mounting on said extension rods.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-30 | 1978-12-30 | 1979-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-30 | 1982-12-30 | 1983-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-30 | 1986-12-30 | 1987-07-01 | $7700.00 | Window Closed / Lapsed |