US3609332A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photoflash lamp array with reflector-lamp module
Assignee: General Electric Co
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Filing: 1968-12-16
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Granted: 1971-09-28
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Expires: 1988-12-16
Abstract
Abstract A photoflash lamp-reflector module for use in a photoflash array for providing optimum optics in a minimum of space where the light source is comparatively large relative to the reflector surface. The module consists of a reflector with a parabolic-type surface for essentially its entire effective reflecting area and a tubular photoflash lamp positioned in the innermost part of the reflector transversely of the axis thereof with the reflector essentially tangent to the lamp. The reflector has an angle relative to its optical axis in the direction of light projection of approximately 45* at a point on that portion of the reflector which is adjacent the centerline of the lamp and extends forwardly of the lamp axis.
Inventors
- 👤 Donald R Schindler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:53
CPC Classifications
G; G03; G03B; G03B15/00; G03B15/02; G03B15/03; G03B15/04; G03B15/0452; G03B15/0457; G03B15/0442
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
108 words
A photoflash device comprising the combination of a reflector and a photoflash lamp wherein: said photoflash lamp is a tubular lamp, said reflector has a parabolic-type surface for essentially its entire effective reflecting area with said photoflash lamp nested adjacent the innermost part of the curvature of said surface, with said curvature essentially tangent to said lamp at the innermost part of said curvature, and said reflector having an angle relative to its optical axis, in the direction of light projection, of approximately 45* at a point on that portion of the reflector comprising the region thereof adjacent the centerline of the lamp and the region forwardly thereof.
Claim 2
Dependent Claim
108 words
A photoflash device comprising the combination of a reflector and a photoflash lamp wherein: said photoflash lamp is a tubular lamp, said reflector has a parabolic-type surface for essentially its entire effective reflecting area with said photoflash lamp nested adjacent the innermost part of the curvature of said surface, with said curvature essentially tangent to said lamp at the innermost part of said curvature, and said reflector having an angle relative to its optical axis, in the direction of light projection, of approximately 45* at a point on that portion of the reflector comprising the region thereof adjacent the centerline of the lamp and the region forwardly thereof.
Claim 3
Dependent Claim
33 words
A photoflash device according to claim 1 in which the point at which the reflector has an angle of 45* relative to its optical axis is at about the centerline of said lamp.
Claim 4
Dependent Claim
28 words
A photoflash device according to claim 1 in which said lamp and said reflector are by symmetrical on the two sides of a plane bisecting the lamp longitudinally.
Claim 5
Dependent Claim
21 words
A photoflash device according to claim 1 in which said reflector has a curvature approximately according to the formula y 1.7x1.8.
Claim 6
Dependent Claim
28 words
A photoflash device according to claim 1 in which said reflector terminates at its upper and lower ends in surfaces which are at least partially surfaces of revolution.
Claim 7
Dependent Claim
54 words
A photoflash device according to claim 5 in which said lamp contains a quantity of filamentary combustible material and in which the surfaces of revolution of the upper and lower ends of the reflector are centered on about the upper and lower ends, respectively, of said quantity of filamentary combustible material in said lamp.
Claim 8
Dependent Claim
35 words
A photoflash device according to claim 6 in which said reflector also has a vertically cylindrical parabolic-type central portion and said lamp is positioned in said reflector longitudinally of the said cylindrical central portion thereof.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |