Patent US4126409A successfully refreshed from Google Patents.
US4126409A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flash array provided with a high voltage combustion flash lamp
Assignee: US Philips Corp
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Filing: 1976-06-30
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Granted: 1978-11-21
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Expires: 1996-06-30
Abstract
Abstract The invention relates to a flash array provided with a number of high voltage combustion flash lamps which each cooperate with a single reflector sheet of an electrically conducting material. This reflector sheet is provided with holes; when a lamp is flashed a radiation-sensitive switching contact is affected via one of the holes. According to the invention the radiation-sensitive contacts open responsive to radiation. These contacts and the reflectors are connected to one another via a low-ohmic connection and whereby further a lamp, whose turn has not yet come, is short circuited. These measures result in the fact that the chance for premature ignition of a lamp is extremely small.
Inventors
- 👤 Johannes G. Bok
- 👤 Bauke J. Roelevink
- 👤 Jan van Werkhoven
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:32
CPC Classifications
G; G03; G03B; G03B15/00; G03B15/02; G03B15/03; G03B15/04; G03B15/0452; G03B15/0457
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
230 words
An assembly which comprises: a housing, a plurality of high voltage flash lamps carried on said housing, first and second electrical terminals on each flashlamp, a reflector having a plurality of concave surfaces, each said concave surface being disposed generally about one of said lamps, said reflector comprising at least a layer of an electrically conducting material, said reflector layer including a plurality of holes, said assembly further including a plurality of connecting electrical paths, each path connecting one terminal of one of said lamps to an associated source of electrical energy, said paths connecting said lamps for operation in a predetermined sequence, each of at least some of said electrical paths including a radiation-sensitive switching contact, each of said holes being disposed in alignment with one of said radiation-sensitive switching contacts disposed in said connecting electrical paths, at least some of said holes also being aligned with one of said lamps and the particular radiation-sensitive contact connected to the next lamp in said predetermined sequence, each switching contact cooperating with radiation transmitted by flashing of the antecedent lamp in said predetermined sequence, said reflector being connected to one of said electrical connectors through a low ohmic connection, each radiation-sensitive switching contact being a break contact and each break contact and said reflector being connected to said first terminal of the first lamp to be flashed in said predetermined sequence.
Claim 2
Dependent Claim
230 words
An assembly which comprises: a housing, a plurality of high voltage flash lamps carried on said housing, first and second electrical terminals on each flashlamp, a reflector having a plurality of concave surfaces, each said concave surface being disposed generally about one of said lamps, said reflector comprising at least a layer of an electrically conducting material, said reflector layer including a plurality of holes, said assembly further including a plurality of connecting electrical paths, each path connecting one terminal of one of said lamps to an associated source of electrical energy, said paths connecting said lamps for operation in a predetermined sequence, each of at least some of said electrical paths including a radiation-sensitive switching contact, each of said holes being disposed in alignment with one of said radiation-sensitive switching contacts disposed in said connecting electrical paths, at least some of said holes also being aligned with one of said lamps and the particular radiation-sensitive contact connected to the next lamp in said predetermined sequence, each switching contact cooperating with radiation transmitted by flashing of the antecedent lamp in said predetermined sequence, said reflector being connected to one of said electrical connectors through a low ohmic connection, each radiation-sensitive switching contact being a break contact and each break contact and said reflector being connected to said first terminal of the first lamp to be flashed in said predetermined sequence.
Claim 3
Dependent Claim
33 words
A flash array as claimed in claim 1, wherein at least some of said high voltage combustion flash lamps are short-circuited until operation the lamp immediately preceding said lamp in said predetermined sequence.
Claim 4
Dependent Claim
33 words
A flash-array as claimed in claim 2, wherein said short circuit of each of at least some of said flash lamps is accomplished by a circuit including two of said radiation-sensitive switching contacts.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-11-20 | 1982-05-22 | 1982-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-11-20 | 1986-05-22 | 1986-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-11-20 | 1990-05-22 | 1990-11-21 | $7700.00 | Window Closed / Lapsed |