Patent US3630650A successfully refreshed from Google Patents.
US3630650A
Expired / Lapsed
US
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Flashlamp and apparatus for making same
Assignee: Osram GmbH
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Filing: 1970-03-12
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Granted: 1971-12-28
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Expires: 1990-03-12
Abstract
Abstract A flashlamp having a small bulb volume (preferably less than 1 cc.) contains a filling of metal foil shreds, preferably of zirconium, of small cross section of 2 to 10 X 10 4 mm.2, which have from 8 to 50 sharp bends, forming acute angles, preferably from 12 to 30 bends per 100 mm. of shred length to effect point contact between the filling and bulb wall. The radius of curvature of the bends is preferably smaller than 0.3 mm. and the angle formed by an individual bend is preferably smaller than 60*. The cross section of the ball formed by a shred of 100 mm. in length is from 40 to 8 mm.2, preferably from 30 to 12 mm.2. A light gain exceeding 40 percent and a longer peak time is obtained.
Inventors
- 👤 Peter Kaufmann
- 👤 Reinhold Liepert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:31
CPC Classifications
F; F21; F21K; F21K5/00; F21K5/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
43 words
A flashlamp according to claim 1 wherein said foil shreds have from 12 to 30 sharp bends per 100 mm. of length and approximately form a ball with a cross-sectional area of from 30 to 12 mm.2 per 100 mm. of shred length.
Claim 2
Dependent Claim
19 words
A flashlamp according to claim 2, wherein the angle formed by an individual bend is substantially smaller than 60*.
Claim 3
Dependent Claim
19 words
A flashlamp according to claim 1, wherein the angle formed by an individual bend is substantially smaller than 60*.
Claim 4
Dependent Claim
21 words
A flashlamp according to claim 2 wherein the foil shreds are 100 mm. long, 32 Mu wide and 20 Mu thick.
Claim 5
Dependent Claim
21 words
A flashlamp according to claim 1 wherein the foil shreds are 100 mm. long, 32 Mu wide and 20 Mu thick.
Claim 6
Dependent Claim
21 words
A flashlamp according to claim 4 wherein the foil shreds are 100 mm. long, 32 Mu wide and 20 Mu thick.
Claim 7
Dependent Claim
14 words
A flashlamp according to claim 2, wherein the foil shreds are composed of zirconium.
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) | 1974-12-27 | 1975-06-28 | 1975-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-27 | 1979-06-28 | 1979-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-27 | 1983-06-28 | 1983-12-28 | $7700.00 | Window Closed / Lapsed |