US4080155A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Switching devices for photoflash unit
Assignee: General Electric Co
•
Filing: 1977-03-18
•
Granted: 1978-03-21
•
Expires: 1997-03-18
Abstract
Abstract An improved static solid switching device is disclosed for activation by radiant energy when a flash lamp located adjacent thereto is flashed. The multiple flash lamp array having a plurality of lamps fired individually and in sequence for use with said improved static solid switching devices is further disclosed. The switches are prepared from compositions which include the presence of a non-conductive particulate solid to provide improvement in switch manufacture as well as switch operation.
Inventors
- 👤 Vaughn C. Sterling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:06
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
46 words
A radiation switch for a flash lamp unit comprising an admixture material having in approximate parts by weight: 50-75 parts of a carbon-containing silver salt, 10-30 parts silver oxide, 1-5 parts of an organic polymer binder, and 5-25 parts of an electrically non-conductive inert particulate solid.
Claim 2
Dependent Claim
46 words
A radiation switch for a flash lamp unit comprising an admixture material having in approximate parts by weight: 50-75 parts of a carbon-containing silver salt, 10-30 parts silver oxide, 1-5 parts of an organic polymer binder, and 5-25 parts of an electrically non-conductive inert particulate solid.
Claim 3
Dependent Claim
15 words
A composition as in claim 1 which further contains 0.5-2.0 parts of a non-ionic surfactant.
Claim 4
Dependent Claim
15 words
A composition as in claim 1 wherein the carbon containing silver salt is silver carbonate.
Claim 5
Dependent Claim
14 words
A composition as in claim 1 wherein the non-conductive particulate solid comprises glass beads.
Claim 6
Dependent Claim
115 words
In a flash lamp unit comprising a pair of flash lamps, an electrical circuit into which said lamps are arranged to flash individually and in sequence, and a solid state radiation energy switch device located adjacent one of said flash lamps and forming part of the electrical circuit, said switch device being located adjacent one of said flash lamps and disposed to receive radiant energy emitted by that flash lamp, the improvement wherein said radiation switch comprises an admixture material having in approximate parts by weight: 50-75 parts of a carbon containing silver salt, 10-30 parts silver oxide, 1-5 parts of an organic polymer binder, and 5-25 parts of an electrically non-conductive inert particulate solid.
Claim 7
Dependent Claim
115 words
In a flash lamp unit comprising a pair of flash lamps, an electrical circuit into which said lamps are arranged to flash individually and in sequence, and a solid state radiation energy switch device located adjacent one of said flash lamps and forming part of the electrical circuit, said switch device being located adjacent one of said flash lamps and disposed to receive radiant energy emitted by that flash lamp, the improvement wherein said radiation switch comprises an admixture material having in approximate parts by weight: 50-75 parts of a carbon containing silver salt, 10-30 parts silver oxide, 1-5 parts of an organic polymer binder, and 5-25 parts of an electrically non-conductive inert particulate solid.
Claim 8
Dependent Claim
30 words
The flash lamp unit of claim 5 wherein the switch device comprises a mass of said material interconnected to a pair of spaced apart electrical terminals in the electrical circuit.
Claim 9
Dependent Claim
27 words
The flash lamp unit of claim 6 wherein the carbon containing silver salt is silver carbonate and the material further contains 0.5-2.0 parts of a non-ionic surfactant.
Claim 10
Dependent Claim
30 words
The flash lamp unit of claim 7 wherein the organic polymer binder is selected from the group consisting of cellulose esters, cellulose ethers, polyalkylacrylates, polyalkylmethacrylates, polymethylmethacrylate, polymethylacrylate, polystyrene and polycarbonate.
Claim 11
Dependent Claim
31 words
The flash lamp unit of claim 8 wherein the non-ionic surfactant is selected from the group consisting of polyoxyethylenes, ethoxylated alkyl phenols, ethoxylated aliphatic alcohols, carboxylic esters, and carboxylic block copolymers.
Claim 12
Dependent Claim
15 words
The flash lamp unit of claim 9 wherein the non-conductive particulate solid comprises glass beads.
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) | 1981-03-20 | 1981-09-19 | 1982-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-20 | 1985-09-19 | 1986-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-20 | 1989-09-19 | 1990-03-21 | $7700.00 | Window Closed / Lapsed |