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US3739166A
Expired / Lapsed
US
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Photoflash device
Assignee: General Electric Co
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Filing: 1971-12-30
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Granted: 1973-06-12
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Expires: 1991-12-30
Abstract
Abstract A photoflash device with a photoflash lamp mounted within a reflector, the lamp being mountable in the reflector only in one or the other of two 180* apart axially oriented positions, has only one moisture indicator spot so located on the inside wall of its transparent envelope as to be viewable from in front of the reflector either directly or by reflection off the reflector irrespective of which one of the axially oriented positions the lamp is mounted in within the reflector.
Inventors
- 👤 R Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 03:16
CPC Classifications
G; G03; G03B; G03B15/00; G03B15/02; G03B15/03; G03B15/04; G03B15/0442
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
197 words
In a photoflash device comprising a base, a reflector positioned with respect to said base, and a photoflash lamp mounted on said base adjacent the innermost region of said reflector, said photoflash lamp including an elongated lighttransmitting envelope disposed with its longitudinal axis extending transversely to the reflector axis of symmetry, said lamp being mountable on said base in either one of two positions spaced 180* apart about its longitudinal axis, said lamp being mountable on said base, in each of said positions, with its longitudinal axis in a mounting plane disposed approximately normal to the reflector axis, the combination therewith of a single spot of a moisture indicating material on the inside wall of said envelope, said indicator spot being located with its center on a line passing through the longitudinal axis of said envelope and extending at an angle of approximately 30* to either side of said mounting plane in each of said two positions whereby the indicator spot is visible from in front of the reflector either directly or as a reflected image off the reflector irrespective of which one of the said two positions the lamp is mounted in relative to the reflector.
Claim 2
Dependent Claim
197 words
In a photoflash device comprising a base, a reflector positioned with respect to said base, and a photoflash lamp mounted on said base adjacent the innermost region of said reflector, said photoflash lamp including an elongated lighttransmitting envelope disposed with its longitudinal axis extending transversely to the reflector axis of symmetry, said lamp being mountable on said base in either one of two positions spaced 180* apart about its longitudinal axis, said lamp being mountable on said base, in each of said positions, with its longitudinal axis in a mounting plane disposed approximately normal to the reflector axis, the combination therewith of a single spot of a moisture indicating material on the inside wall of said envelope, said indicator spot being located with its center on a line passing through the longitudinal axis of said envelope and extending at an angle of approximately 30* to either side of said mounting plane in each of said two positions whereby the indicator spot is visible from in front of the reflector either directly or as a reflected image off the reflector irrespective of which one of the said two positions the lamp is mounted in relative to the reflector.
Claim 3
Dependent Claim
44 words
A photoflash device as set forth in claim 1 wherein the said reflector is formed with a lamp-receiving tunnel at its innermost region within which the said envelope of the lamp is nested to a depth around 20 to 30 percent of its diameter.
Claim 4
Dependent Claim
20 words
A photoflash device as specified in claim 1 wherein a plurality of said photoflash devices are mounted adjacent one another.
Claim 5
Dependent Claim
44 words
A photoflash device as specified in claim 1 including four of said devices located adjacent one another, with adjacent ones of said devices mounted at right angles to each other and with their said reflectors facing outwardly to form four sides of a cube.
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) | 1976-06-11 | 1976-12-11 | 1977-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-11 | 1980-12-11 | 1981-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-11 | 1984-12-11 | 1985-06-12 | $7700.00 | Window Closed / Lapsed |