Patent US3955866A successfully refreshed from Google Patents.
US3955866A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing a flash lamp
Assignee: US Philips Corp
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Filing: 1974-08-09
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Granted: 1976-05-11
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Expires: 1994-08-09
Abstract
Abstract The invention relates to a method of manufacturing a flash lamp comprising an envelope which is filled with thin strips of combustible material, in which a ball of the strip material is compressed to the desired shape in a tube by means of two dies and is annealed in that shape in a stress-free manner.
Inventors
- 👤 Johannes Cornelis Antonie Vreeswijk
- 👤 Henricus Petrus Wilhelmus Wolffensperger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:19
CPC Classifications
F; F21; F21K; F21K5/00; F21K5/02; F21K5/023; F21K5/026
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
98 words
A method of manufacturing a flash lamp having an envelope filled with thin strips of intertwined combustible material which comprises: providing a chamber and a reciprocally mounted first die having a peripheral face dimensioned and configured for snug fitting engagement within said chamber during reciprocation of said first die; introducing a quantity of intertwined elongated pieces of combustible material into said chamber; compressing said quantity of material to the shape of said chamber by reciprocation of said first die; annealing the shaped material to a stress-free state; inserting said shaped material into said envelope; and sealing said envelope.
Claim 2
Independent Claim
98 words
A method of manufacturing a flash lamp having an envelope filled with thin strips of intertwined combustible material which comprises: providing a chamber and a reciprocally mounted first die having a peripheral face dimensioned and configured for snug fitting engagement within said chamber during reciprocation of said first die; introducing a quantity of intertwined elongated pieces of combustible material into said chamber; compressing said quantity of material to the shape of said chamber by reciprocation of said first die; annealing the shaped material to a stress-free state; inserting said shaped material into said envelope; and sealing said envelope.
Claim 3
Dependent Claim
25 words
A method as claimed in claim 1, wherein said annealing step is carried out in an inert atmosphere at a temperature of at least 400°C.
Claim 4
Dependent Claim
24 words
A method as claimed in claim 1, wherein said annealing step is carried out in a vacuum at a temperature of at least 250°C.
Claim 5
Dependent Claim
20 words
A method as claimed in claim 1, wherein said annealing step is carried out by means of concentrated light beams.
Claim 6
Dependent Claim
22 words
A method as claimed in claim 1 wherein said annealing step is carried out by means of a high frequency electromagnetic field.
Claim 7
Dependent Claim
60 words
The method as described in claim 1 wherein said chamber is cylindrical and said first providing step includes providing a second die mounted for reciprocation, said second die being disposed in opposed relation to said first die, and dimensioned and configured for snug fitting engagement with said chamber; and said compressing step includes reciprocation of said first and second dies.
Claim 8
Dependent Claim
27 words
The method as described in claim 6 wherein said chamber is tubular and said first and second dies are cylindrical and said chamber and dies being coaxial.
Claim 9
Dependent Claim
13 words
The method as described in claim 2 wherein said inert atmosphere is nitrogen.
Claim 10
Dependent Claim
13 words
The method as described in claim 2 wherein said inert atmosphere is argon.
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) | 1979-05-11 | 1979-11-10 | 1980-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-11 | 1983-11-10 | 1984-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-11 | 1987-11-10 | 1988-05-11 | $7700.00 | Window Closed / Lapsed |