Patent US4335940A successfully refreshed from Google Patents.
Patent US3134932A successfully refreshed from Google Patents.
US3134932A
Expired / Lapsed
US
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Alternating current solenoid having yieldingly mounted stop
Assignee: TDK Micronas GmbH
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Filing: 1960-03-28
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Granted: 1964-05-26
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Expires: 1980-03-28
Abstract
No abstract record available.
Inventors
- 👤 William A Ray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:27
CPC Classifications
H; H01; H01F; H01F7/00; H01F7/06; H01F7/08; H01F7/10; H01F7/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
IN AN ELECTROMAGNET STRUCTURE HAVING A NON-MAGNETIC COIL FRAME, A COIL MOUNTED ON THE FRAME, A MOVABLE PLUNGER OF MAGNETIC MATERIAL, AND A STOP FOR THE PLUNGER ALSO MADE OF MAGNETIC MATERIAL, CHARACTERIZED BY THE PROVISION OF A MOUNTING FOR THE STOP TO PERMIT THE STOP TO HAVE LIMITED MOVEMENT RELATIVE TO THE PLUNGER FOR ABSORBING AT LEAST PARTIALLY THE IMPACT OF THE PLUNGER ON THE STOP UPON ENERGIZATION OF THE COIL, COMPRISING: A YIELDING DISC SURROUNDING THE STOP AND SUPPORTED ON THE FRAME; MEANS ATTACHED TO THE STOP FOR PROVIDING A LOWER SURFACE ABOVE THE DISC; A SECOND YIELDING DISC IN CONTACT WITH THE UPPER SURFACE OF SAID MEANS; AND MEANS LIMITING THE UPWARD MOVEMENT OF THE SECOND DISC; SAID SECOND DISC HAVING SUBSTANTIAL CLEARANCE WITH RESPECT TO THE LIMITING MEANS WHEN THE ELECTROMAGNET STRUCTURE IS DEENERGIZED.
Claim 2
Dependent Claim
138 words
IN AN ELECTROMAGNET STRUCTURE HAVING A NON-MAGNETIC COIL FRAME, A COIL MOUNTED ON THE FRAME, A MOVABLE PLUNGER OF MAGNETIC MATERIAL, AND A STOP FOR THE PLUNGER ALSO MADE OF MAGNETIC MATERIAL, CHARACTERIZED BY THE PROVISION OF A MOUNTING FOR THE STOP TO PERMIT THE STOP TO HAVE LIMITED MOVEMENT RELATIVE TO THE PLUNGER FOR ABSORBING AT LEAST PARTIALLY THE IMPACT OF THE PLUNGER ON THE STOP UPON ENERGIZATION OF THE COIL, COMPRISING: A YIELDING DISC SURROUNDING THE STOP AND SUPPORTED ON THE FRAME; MEANS ATTACHED TO THE STOP FOR PROVIDING A LOWER SURFACE ABOVE THE DISC; A SECOND YIELDING DISC IN CONTACT WITH THE UPPER SURFACE OF SAID MEANS; AND MEANS LIMITING THE UPWARD MOVEMENT OF THE SECOND DISC; SAID SECOND DISC HAVING SUBSTANTIAL CLEARANCE WITH RESPECT TO THE LIMITING MEANS WHEN THE ELECTROMAGNET STRUCTURE IS DEENERGIZED.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-05-26 | 1967-11-25 | 1968-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-26 | 1971-11-25 | 1972-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-26 | 1975-11-25 | 1976-05-26 | $7700.00 | Window Closed / Lapsed |