Patent US4155110A successfully refreshed from Google Patents.
US4155110A
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Reflector-lamp module for photoflash array
Assignee: FLOWIL INTERNATIONAL (HOLDING) BV
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Filing: 1977-09-01
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Granted: 1979-05-15
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Expires: 1997-09-01
Abstract
Abstract A photoflash lamp-reflector module for use in a photoflash unit having a plurality of such lamp-reflector modules arranged in a compact array. Each reflector has a substantially parabolic surface with a centrally disposed elongated cylindrical recess having a longitudinally extending central slot. The associated tubular lamp is nested within the recessed portion of the reflector, whereby an oversized lamp is accommodated by the reflector with little or no loss of light output.
Inventors
- 👤 Donald E. Armstrong
- 👤 Emergy G. Audesse
- 👤 John W. Shaffer
- 👤 Donald W. Hartman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:19
CPC Classifications
G; G03; G03B; G03B15/00; G03B15/02; G03B15/03; G03B15/04; G03B15/0442
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
55 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 substantially parabolic surface with a centrally disposed elongated cylindrical recess having a longitudinally extending slot centrally located therein, and said lamp is nested within said recessed portion of the reflector.
Claim 2
Dependent Claim
55 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 substantially parabolic surface with a centrally disposed elongated cylindrical recess having a longitudinally extending slot centrally located therein, and said lamp is nested within said recessed portion of the reflector.
Claim 3
Dependent Claim
44 words
The device of claim 1 wherein the thickness of the recessed portion of said reflector is tapered to be substantially thinner about at least portions of the periphery of said slot, said lamp being nested adjacent the recessed and tapered portion of said reflector.
Claim 4
Dependent Claim
48 words
The device of claim 2 wherein said reflector comprises a molded material, and the convex cylindrical shape of the back side of the recessed portion of said reflector is flattened along at least portions thereof adjacent the periphery of said slot, said flattened portions providing said tapered portions.
Claim 5
Dependent Claim
27 words
The device of claim 3 wherein the thickness of the tapered portions of said reflector is reduced by a ratio of at least about 3.5 to 1.
Claim 6
Dependent Claim
22 words
The device of claim 4 wherein said slot extends substantially the entire length of said recess and is open at one end.
Claim 7
Dependent Claim
15 words
The device of claim 5 wherein said slot includes at least one enlarged circular opening.
Claim 8
Dependent Claim
54 words
The device of claim 4 wherein said slot is interrupted at one or more locations by a web of said molded material continuing the cylindrical surface of the front side of said recessed portion and the flattened surface of the back side of said recessed portion, thereby increasing the structural rigidity of said reflector.
Claim 9
Dependent Claim
29 words
The device of claim 1 wherein the parabolic portion of said reflector terminates at its upper and lower ends in surfaces which are at least partially surfaces of revolution.
Claim 10
Dependent Claim
16 words
The device of claim 8 wherein said reflector also has a vertically cylindrical parabolic central portion.
Claim 11
Dependent Claim
21 words
The device of claim 1 wherein said reflector comprises a vacuum-formed material having a maximum wall thickness of about 15 mils.
Claim 12
Dependent Claim
35 words
The device of claim 10 wherein said slot is interrupted at one or more locations by a web of said vacuum-formed material continuing the cylindrical recess to thereby increase the structural rigidity of said reflector.
Claim 13
Dependent Claim
22 words
The device of claim 10 wherein said slot extends substantially the entire length of said recess and is open at one end.
Claim 14
Dependent Claim
15 words
The device of claim 12 wherein said slot includes at least one enlarged circular opening.
References Cited (Backward Citations)
US3991308A
Cited
US3980875A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-05-14 | 1982-11-13 | 1983-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-05-14 | 1986-11-13 | 1987-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-05-14 | 1990-11-13 | 1991-05-15 | $7700.00 | Window Closed / Lapsed |