Patent US3832124A successfully refreshed from Google Patents.
US3832124A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photoflash lamp
Assignee: Individual
•
Filing: 1972-10-02
•
Granted: 1974-08-27
•
Expires: 1992-10-02
Abstract
Abstract A percussive-type photoflash lamp having an envelope comprised of a glass having a low coefficient of thermal expansion and a depending metal primer tube which is sealed to the glass envelope in a manner placing the glass under compression.
Inventors
- 👤 F Koury
- 👤 W Hay
- 👤 F Loughridge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:29
CPC Classifications
G; G03; G03B; G03B15/00; G03B15/02; G03B15/03; G03B15/04; G03B15/0478; G03B15/0484; F; F21; F21K; F21K5/00; F21K5/02; F21K5/023; F21K5/026
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
92 words
A lamp according to claim 1 wherein: said otherwise open end of said glass envelope is substantially tubular; said tubular metal piece has a tube portion which is closed at one end, a flat base portion extending radially outward from the open end of said tube portion, and a tubular rim portion extending from said base portion away from said tube portion and coaxial therewith; and said tubular end of said glass envelope is disposed within the tubular rim portion of said metal piece and secured thereto in a mismatched compression seal.
Claim 2
Dependent Claim
39 words
A lamp according to claim 2 wherein the rim portion of said metal piece is tapered to a feather-edge to distribute the tension strain in the glass at the boundary of the compression zone over a relatively wide area.
Claim 3
Dependent Claim
27 words
A lamp according to claim 2 wherein said metal piece alloy comprises the following constituents in about the proportions stated by weight: 42% Ni and 58% Fe.
Claim 4
Dependent Claim
21 words
A lamp according to claim 2 wherein said tubular metal piece is composed of an alloy comprising iron, nickel and cobalt.
Claim 5
Dependent Claim
59 words
A lamp according to claim 2 wherein the primer further includes a wire anvil disposed within and substantially coaxial with the tube portion of said metal piece with said fulminating material being disposed thereon intermediate the ends thereof, and a deflector-shield disposed on said wire anvil immediately above the open end of the tube portion of said metal piece.
References Cited (Backward Citations)
US1653380A
Cited
US831396A
Cited
US1294466A
Cited
US1727755A
Cited
US3600120A
Cited
US3506385A
Cited
US3623196A
Cited
US3511586A
Cited
US3514243A
Cited
US3540820A
Cited
US3676043A
Cited
US3645663A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-26 | 1978-02-25 | 1978-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-26 | 1982-02-25 | 1982-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-26 | 1986-02-25 | 1986-08-27 | $7700.00 | Window Closed / Lapsed |