Patent US3244843A successfully refreshed from Google Patents.
US3244843A
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Arc-controlling auxiliary contact assembly for electric switches
Assignee: Jennings Radio Manufacturing Corp
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Filing: 1963-10-16
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Granted: 1966-04-05
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Expires: 1983-10-16
Abstract
No abstract record available.
Inventors
- 👤 Hugh C Ross
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:38
CPC Classifications
H; H01; H01H; H01H33/00; H01H33/60; H01H33/66; H01H33/662; H01H33/66207; H01H33/02; H01H33/04; H01H33/12; H01H33/664; H01H33/6644; H01H33/6645; H01H2033/66223; H01H33/66261; Y; Y10; Y10T; Y10T29/00; Y10T29/51; Y10T29/5184
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
111 words
IN A VACUUM ELECTRIC SWITCH, A CONTACT ASSEMBLY COMPRISING A PAIR OF AXIALLY DISPOSED STUD CONTACTS, A PAIR OF AUXILIARY ANNULAR CONTACTS SURROUNDING SAID STUD CONTACTS, AND RESILIENT MEANS CONNECTING SAID AUXILIARY ANNULAR CONTACTS TO SAID STUD CONTACTS WHEREBY UPON ACTUATION OF THE SWITCH TO MAKE A CIRCUIT THROUGH THE SWITCH SAID AUXILIARY CONTACTS MAKE CONTACT BEFORE SAID STUD CONTACTS TO ESTABLISH A PARALLEL CONDUCTIVE PATH THROUGH THE SWITCH AND UPON ACTUATION OF THE SWITCH TO BREAK THE CIRCUIT THERETHROUGH THE STUD CONTACTS BREAK CONTACT BEFORE THE AUXILIARY CONTACTS SO THAT THE ANNULAR AUXILIARY CONTACTS ALONE CARRY THE MOMENTARY SURGE OF CURRENT THROUGH THE SWITCH UPON SEPARATION OF SAID STUD 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) | 1969-04-04 | 1969-10-04 | 1970-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-04 | 1973-10-04 | 1974-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-04 | 1977-10-04 | 1978-04-05 | $7700.00 | Window Closed / Lapsed |