US3072766A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical resistance for heavy duty swith
Assignee: BBC Brown Boveri AG Germany
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Filing: 1960-06-23
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Granted: 1963-01-08
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Expires: 1980-06-23
Abstract
No abstract record available.
Inventors
- 👤 Roth Heinz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:47
CPC Classifications
H; H01; H01H; H01H33/00; H01H33/02; H01H33/04; H01H33/16; H01H33/161
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
ELECTRICAL SWITCHING APPARATUS COMPRISING A SET OF POWER SWITCHING CONTACTS CONNECTED IN SERIES WITH A SET OF VOLTAGE DISCONNECT CONTACTS, AND A RESISTANCE UNIT CONNECTED IN PARALLEL WITH SAID SET OF POWER SWITCHING CONTACTS, SAID RESISTANCE UNIT BEING COMPRISED OF A PHOTOSENSITIVE RESISTANCE MATERIAL HAVING AN OHMIC VALUE VARIABLE INVERSELY BY SEVERAL ORDERS OF MAGNITUDE AS THE AMOUNT OF RADIATION WHICH IT RECEIVES, AND SAID RESISTANCE UNIT BEING SUBJECT TO RADIATION PROPORTIONAL TO THAT PRODUCED BY THE ARC ESTABLISHED UPON SEPARATION OF SAID SET OF POWER SWITCHING CONTACTS.
Claim 2
Dependent Claim
88 words
ELECTRICAL SWITCHING APPARATUS COMPRISING A SET OF POWER SWITCHING CONTACTS CONNECTED IN SERIES WITH A SET OF VOLTAGE DISCONNECT CONTACTS, AND A RESISTANCE UNIT CONNECTED IN PARALLEL WITH SAID SET OF POWER SWITCHING CONTACTS, SAID RESISTANCE UNIT BEING COMPRISED OF A PHOTOSENSITIVE RESISTANCE MATERIAL HAVING AN OHMIC VALUE VARIABLE INVERSELY BY SEVERAL ORDERS OF MAGNITUDE AS THE AMOUNT OF RADIATION WHICH IT RECEIVES, AND SAID RESISTANCE UNIT BEING SUBJECT TO RADIATION PROPORTIONAL TO THAT PRODUCED BY THE ARC ESTABLISHED UPON SEPARATION OF SAID SET OF POWER SWITCHING CONTACTS.
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) | 1966-01-07 | 1966-07-09 | 1967-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-07 | 1970-07-09 | 1971-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-07 | 1974-07-09 | 1975-01-08 | $7700.00 | Window Closed / Lapsed |