Patent US3269987A successfully refreshed from Google Patents.
US3269987A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric switch with frangible and expendable electrodes
Assignee: United Kingdom Atomic Energy Authority
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Filing: 1964-10-14
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Granted: 1966-08-30
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Expires: 1984-10-14
Abstract
No abstract record available.
Inventors
- 👤 Alston Liviu Leonard
- 👤 Rogers Patrick Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:02
CPC Classifications
H; H01; H01H; H01H33/00; H01H33/002; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49105; Y10T29/49826; Y10T29/49833
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
AN ELECTIC SWITCH COMPRISING A LAYER OF ELECTRICALLYINSULATING MATERIAL SANDWICHED BETWEEN TWO EXPENDABLE ELECTRODES, TWO MAIN ELECTODES BETWEEN WHICH THE SANDWICH IS HELD SUCH THAT THE TWO MAIN ELECTODES CONTACT THE TWO EXPENDABLE ELECTRODES RESPECTIVELY, THE ELECTRIC SUPLY TO BE SWITCHED BEING ARRANGED TO BE CONNECTED ACROSS THE MAIN ELECTRODES, A PAIR OF ALIGNED APERTURES IN THE MAIN ELECTRODES NORMAL TO THE GENERAL PLANE OF THE SANDWICH, A PLUNGER, AND MEANS OPERATED WHEN THE SWITCH IS TO BE CLOSED TO FORMCE THE PLUNGER INTO THE APERTURES SUCH THAT THE SANDWICH IS PIERCED AND DEFORMED PORTIONS OF THE EXPENDABLE ELECTRODES FIRST PIERCED CONTACT THE OTHER EXPENDABLE ELECTRODE AND COMPLETE THE ELECTRIC PATH BETWEEN THE MAIN ELECTRODES.
Claim 2
Dependent Claim
115 words
AN ELECTIC SWITCH COMPRISING A LAYER OF ELECTRICALLYINSULATING MATERIAL SANDWICHED BETWEEN TWO EXPENDABLE ELECTRODES, TWO MAIN ELECTODES BETWEEN WHICH THE SANDWICH IS HELD SUCH THAT THE TWO MAIN ELECTODES CONTACT THE TWO EXPENDABLE ELECTRODES RESPECTIVELY, THE ELECTRIC SUPLY TO BE SWITCHED BEING ARRANGED TO BE CONNECTED ACROSS THE MAIN ELECTRODES, A PAIR OF ALIGNED APERTURES IN THE MAIN ELECTRODES NORMAL TO THE GENERAL PLANE OF THE SANDWICH, A PLUNGER, AND MEANS OPERATED WHEN THE SWITCH IS TO BE CLOSED TO FORMCE THE PLUNGER INTO THE APERTURES SUCH THAT THE SANDWICH IS PIERCED AND DEFORMED PORTIONS OF THE EXPENDABLE ELECTRODES FIRST PIERCED CONTACT THE OTHER EXPENDABLE ELECTRODE AND COMPLETE THE ELECTRIC PATH BETWEEN THE MAIN ELECTRODES.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-29 | 1970-02-28 | 1970-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-29 | 1974-02-28 | 1974-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-29 | 1978-02-28 | 1978-08-30 | $7700.00 | Window Closed / Lapsed |