Patent US4338654A successfully refreshed from Google Patents.
US4338654A
Expired / Lapsed
US
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Variable spot stage light
Assignee: Individual
•
Filing: 1980-09-20
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Granted: 1982-07-06
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Expires: 2000-09-20
Abstract
Abstract A stage light comprising a reflector, an incandescent source, a variable iris and an objective lens system, the position of the lamp and the iris opening being variable individually or in ganged fashion.
Inventors
- 👤 Richard Logothetis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:56
CPC Classifications
F; F21; F21S; F21S8/00; F21V; F21V11/00; F21V11/08; F21V11/16; F21V11/18; F21V14/00; F21V14/02; F21V14/04; F21V14/06; F21V17/00; F21V17/02; F21V11/10; F21W; F21W2131/00; F21W2131/40; F21W2131/406; Y; Y10; Y10S; Y10S362/00; Y10S362/804
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
194 words
A stage light comprising: (a) a frame, having a forward direction towards which the light is to be beamed, and a reward direction opposite the forward direction, (b) an incandescent lamp movably mounted within the frame and located towards the rear of the frame, (c) a reflector placed adjacent and to the rear of the lamp and on the same movable mounting as the lamp having general hemispherical coverage of the lamp generally parabolic contours to capture and beam the light from the rear of the lamp in the forward direction, (d) a variable aperture iris fixedly mounted to the frame and positioned forward of the lamp to control the amout of light from the lamp and reflector passed in the forward direction by means of varying the aperture size, (e) an objective lens system located forward of the iris to accept and focus the light passed through the iris, and (f) means for linking the lamp and reflector on the movable mounting to the iris to automatically adjust the iris aperture with the movement of the lamp and reflector for maximum forward light transmission with each setting of the lamp and reflector position.
Claim 2
Dependent Claim
194 words
A stage light comprising: (a) a frame, having a forward direction towards which the light is to be beamed, and a reward direction opposite the forward direction, (b) an incandescent lamp movably mounted within the frame and located towards the rear of the frame, (c) a reflector placed adjacent and to the rear of the lamp and on the same movable mounting as the lamp having general hemispherical coverage of the lamp generally parabolic contours to capture and beam the light from the rear of the lamp in the forward direction, (d) a variable aperture iris fixedly mounted to the frame and positioned forward of the lamp to control the amout of light from the lamp and reflector passed in the forward direction by means of varying the aperture size, (e) an objective lens system located forward of the iris to accept and focus the light passed through the iris, and (f) means for linking the lamp and reflector on the movable mounting to the iris to automatically adjust the iris aperture with the movement of the lamp and reflector for maximum forward light transmission with each setting of the lamp and reflector position.
Claim 3
Dependent Claim
36 words
A light as claimed in claim 1 further comprising means for disconnecting the means for linking the lamp and reflector to the iris to provide for varying the iris aperture independent of the lamp and reflector.
References Cited (Backward Citations)
US2236845A
Cited
US4232359A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-07-05 | 1986-01-04 | 1986-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-07-05 | 1990-01-04 | 1990-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-07-05 | 1994-01-04 | 1994-07-06 | $7700.00 | Window Closed / Lapsed |