US3728068A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photoflash lamp array having flash-actuated switches
Assignee: General Electric Co
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Filing: 1971-12-09
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Granted: 1973-04-17
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Expires: 1991-12-09
Abstract
Abstract A photoflash lamp array having flash-actuated switches respectively associated with a plurality of the flash lamps and adapted, when the associated lamp is flashed, to connect a next lamp into the electrical flashing circuit. Resistors are respectively connected in series with the plurality of flash lamps and function to insure continued operation of the lash array in the event that a flashed lamp becomes shorted instead of the usual open-circuit condition.
Inventors
- 👤 P Cote
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:17
CPC Classifications
G; G03; G03B; G03B15/00; G03B15/02; G03B15/03; G03B15/04; G03B15/0452; G03B15/0457
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
114 words
A photoflash lamp array having terminal means adapted for connection to a source of firing pulses and having a plurality of flash-actuated switches respectively associated with a plurality of flash lamps of the array and being responsive to the flashing of an associated lamp so as, when the associated lamp is flashed, to connect a next lamp of the array to said terminal means, wherein the improvement comprises a plurality of resistors respectively interposed in series with said plurality of flash lamps, said resistors having values of resistance so as to insure flashing of succeeding lamps by said firing pulses in the event that one of said plurality of lamps becomes shorted upon flashing.
Claim 2
Dependent Claim
114 words
A photoflash lamp array having terminal means adapted for connection to a source of firing pulses and having a plurality of flash-actuated switches respectively associated with a plurality of flash lamps of the array and being responsive to the flashing of an associated lamp so as, when the associated lamp is flashed, to connect a next lamp of the array to said terminal means, wherein the improvement comprises a plurality of resistors respectively interposed in series with said plurality of flash lamps, said resistors having values of resistance so as to insure flashing of succeeding lamps by said firing pulses in the event that one of said plurality of lamps becomes shorted upon flashing.
Claim 3
Dependent Claim
34 words
A photoflash lamp array as claimed in claim 1, in which said flash-actuated switches are adapted to be actuated by heat produced by the flashing of the respective lamps with which they are associated.
Claim 4
Dependent Claim
34 words
A photoflash lamp array as claimed in claim 1, in which said flash-actuated switches are adapted to be actuated by light produced by the flashing of the respective lamps with which they are associated.
Claim 5
Dependent Claim
36 words
A photoflash lamp array as claimed in claim 1, in which each of said resistors has a resistance value of about twice that of the filament of the lamp with which it is interposed in series.
Claim 6
Dependent Claim
40 words
A photoflash lamp array as claimed in claim 4, in which each of said plurality of flash lamps has a filament resistance of approximately 0.6 ohms and each of said plurality of resistors has a resistance of approximately 1 ohm.
Claim 7
Dependent Claim
111 words
A photoflash lamp array having terminal means adapted for connection to a source of firing pulses and having a plurality of flash lamps including a first flash lamp and a second flash lamp, wherein the improvement comprises a resistor connected in series combination with said first lamp, means for connecting said series combination to said terminal means, and a flash-actuated switch adapted to become conductive and connect said second lamp to said terminal means when said first lamp is flashed, said resistor having a value of resistance so as to insure flashing of said second lamp by a firing pulse in the event that said first lamp becomes shorted upon flashing.
Claim 8
Dependent Claim
111 words
A photoflash lamp array having terminal means adapted for connection to a source of firing pulses and having a plurality of flash lamps including a first flash lamp and a second flash lamp, wherein the improvement comprises a resistor connected in series combination with said first lamp, means for connecting said series combination to said terminal means, and a flash-actuated switch adapted to become conductive and connect said second lamp to said terminal means when said first lamp is flashed, said resistor having a value of resistance so as to insure flashing of said second lamp by a firing pulse in the event that said first lamp becomes shorted upon flashing.
Claim 9
Dependent Claim
29 words
A photoflash lamp array as claimed in claim 6, in which said flash-actuated switch is adapted to be actuated by heat produced by said flashing of the first lamp.
Claim 10
Dependent Claim
29 words
A photoflash lamp array as claimed in claim 6, in which said flash-actuated switch is adapted to be actuated by light produced by said flashing of the first lamp.
Claim 11
Dependent Claim
28 words
A photoflash lamp array as claimed in claim 6, in which said resistor has a resistance value of about twice that of the filament of said first lamp.
Claim 12
Dependent Claim
33 words
A photoflash lamp array as claimed in claim 9, in which said first flash lamp has a filament resistance of approximately 0.6 ohms and said resistor has a resistance of approximately 1 ohm.
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) | 1976-04-16 | 1976-10-16 | 1977-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-16 | 1980-10-16 | 1981-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-16 | 1984-10-16 | 1985-04-17 | $7700.00 | Window Closed / Lapsed |