US3305808A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arrangement for the protection of actuating electromagnets operated by alternating current against overheating
Assignee: Robert Bosch GmbH
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Filing: 1965-05-18
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Granted: 1967-02-21
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Expires: 1985-05-18
Abstract
No abstract record available.
Inventors
- 👤 Widl Gerhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:09
CPC Classifications
H; H01; H01F; H01F7/00; H01F7/06; H01F7/08; H01F7/16; H01F7/1607; H01F7/1623
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
192 words
ARRANGEMENT FOR THE PROTECTION OF ACTUATING ELECTROMAGNETS OPERATED BY ALTERNATING CURRENT AGAINST OVERHEATING COMPRISING, IN COMBINATION, SUPPORT MEANS HAVING AN ABUTMENT FACE; AN ELECTROMAGNET INCLUDING A YOKE NORMALLY SUPPORTED ON SAID ABUTMENT FACE OF SAID SUPPORT MEANS AND BEING SLIDABLY GUIDED BY SAID SUPPORT MEANS MOVABLY AWAY FROM AND TOWARD SAID ABUTMENT FACE, AND A MAGNET WINDING CARRIED BY SAID YOKE AND ADAPTED TO BE CONNECTED TO A SOURCE OF ALTERNATING CURRENT FOR ENERGIZING SAID ELECTROMAGNET; AN ARMATURE SEPARATED BY AN AIR GAP FROM SAID YOKE TO BE MOVED ALONG A WORKING STROKE WHEN SAID MAGNET IS ENERGIZED BY AN ALTERNATING CURRENT, WHEREBY THE CURRENT DRAWN BY SAID WINDING IS GREATER AT THE BEGINNING AND SMALLER AT THE END OF SAID WORKING STROKE; CONNECTING MEANS ENGAGING SAID ARMATURE AND BEING ADAPTED TO BE CONNECTED TO AN ELEMENT TO BE MOVED BY SAID ARMATURE DURING MOVEMENT OF THE LATTER ALONG SAID WORKING STROKE; AND SPRING MEANS OPERATIVELY CONNECTED TO SAID YOKE AND ARRANGED AND CONSTRUCTED TO YIELDABLY PRESS SAID YOKE AGAINST SAID ABUTMENT FACE WITH A FORCE WHICH AT ANY POSITION OF SAID MAGNET AND SAID ARMATURE RELATIVE TO EACH OTHER IS SMALLER
Claim 2
Dependent Claim
192 words
ARRANGEMENT FOR THE PROTECTION OF ACTUATING ELECTROMAGNETS OPERATED BY ALTERNATING CURRENT AGAINST OVERHEATING COMPRISING, IN COMBINATION, SUPPORT MEANS HAVING AN ABUTMENT FACE; AN ELECTROMAGNET INCLUDING A YOKE NORMALLY SUPPORTED ON SAID ABUTMENT FACE OF SAID SUPPORT MEANS AND BEING SLIDABLY GUIDED BY SAID SUPPORT MEANS MOVABLY AWAY FROM AND TOWARD SAID ABUTMENT FACE, AND A MAGNET WINDING CARRIED BY SAID YOKE AND ADAPTED TO BE CONNECTED TO A SOURCE OF ALTERNATING CURRENT FOR ENERGIZING SAID ELECTROMAGNET; AN ARMATURE SEPARATED BY AN AIR GAP FROM SAID YOKE TO BE MOVED ALONG A WORKING STROKE WHEN SAID MAGNET IS ENERGIZED BY AN ALTERNATING CURRENT, WHEREBY THE CURRENT DRAWN BY SAID WINDING IS GREATER AT THE BEGINNING AND SMALLER AT THE END OF SAID WORKING STROKE; CONNECTING MEANS ENGAGING SAID ARMATURE AND BEING ADAPTED TO BE CONNECTED TO AN ELEMENT TO BE MOVED BY SAID ARMATURE DURING MOVEMENT OF THE LATTER ALONG SAID WORKING STROKE; AND SPRING MEANS OPERATIVELY CONNECTED TO SAID YOKE AND ARRANGED AND CONSTRUCTED TO YIELDABLY PRESS SAID YOKE AGAINST SAID ABUTMENT FACE WITH A FORCE WHICH AT ANY POSITION OF SAID MAGNET AND SAID ARMATURE RELATIVE TO EACH OTHER IS SMALLER
References Cited (Backward Citations)
US1194132A
Cited
US2692354A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-20 | 1970-08-22 | 1971-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-20 | 1974-08-22 | 1975-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-20 | 1978-08-22 | 1979-02-21 | $7700.00 | Window Closed / Lapsed |