US3597604A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic flashlamp unit
Assignee: GTE Sylvania Inc
•
Filing: 1968-12-19
•
Granted: 1971-08-03
•
Expires: 1988-12-19
Abstract
Abstract A multilamp photographic flash unit, the lamps of which are of percussive primer type, having self-contained elements in the form of a folded torsion spring for firing the lamps. The tip of the stationary end of the spring is shaped to function as a catch to hold the striker formed on the movable end thereof while the spring is in a cocked position.
Inventors
- 👤 John W Shaffer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:53
CPC Classifications
G; G03; G03B; G03B15/00; G03B15/02; G03B15/03; G03B15/04; G03B15/0478; G03B15/0489; F; F21; F21K; F21K5/00; F21K5/02; F21K5/023; F21K5/026; G03B15/0452; G03B15/0457; G03B15/0484
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
94 words
A photographic flashlamp unit comprising: a platform; a plurality of flashlamps mounted on said platform, each of said flashlamps comprising an hermetically sealed, lighttransmitting envelope having a source of actinic light disposed therein and a primer depending therefrom; and a folded torsional spring having a substantially hairpin torsional section, a supporting leg extending from one end of said hairpin torsional section and fixedly mounted on said platform, and a striker extending from the other end of said hairpin torsional section for firing said primer and thus effecting ignition of said source of actinic light.
Claim 2
Dependent Claim
94 words
A photographic flashlamp unit comprising: a platform; a plurality of flashlamps mounted on said platform, each of said flashlamps comprising an hermetically sealed, lighttransmitting envelope having a source of actinic light disposed therein and a primer depending therefrom; and a folded torsional spring having a substantially hairpin torsional section, a supporting leg extending from one end of said hairpin torsional section and fixedly mounted on said platform, and a striker extending from the other end of said hairpin torsional section for firing said primer and thus effecting ignition of said source of actinic light.
Claim 3
Dependent Claim
27 words
The combination of claim 1 in which said supporting leg has a catch formed at the tip thereof, said catch restraining said striker in a cocked condition.
Claim 4
Dependent Claim
20 words
The combination of claim 2 in which said platform includes access means for enabling said cocked striker to be tripped.
Claim 5
Dependent Claim
19 words
The combination of claIm 1 in which each of said flashlamps has its own folded torsional spring associated therewith.
Claim 6
Dependent Claim
45 words
The combination of claim 1 and a plurality of reflectors located on said platform, one for each of said flashlamps, said reflectors being arranged so that the rear faces thereof define a central chamber, said folded torsional spring being located primarily within said central chamber.
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) | 1974-08-02 | 1975-02-01 | 1975-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-02 | 1979-02-01 | 1979-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-02 | 1983-02-01 | 1983-08-03 | $7700.00 | Window Closed / Lapsed |