US3250871A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotational speed control switch
Assignee: WIGGER LAWRENCE H
•
Filing: 1963-12-17
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Granted: 1966-05-10
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Expires: 1983-12-17
Abstract
No abstract record available.
Inventors
- 👤 Lawrence H Wigger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:37
CPC Classifications
H; H01; H01H; H01H36/00; H01H36/0006; H01H35/00; H01H35/06; H01H35/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
A ROTATIONAL SPEED CONTROL SWTICH RESPONSIVE TO EITHER IN INCREASE OR DECREASE IN THE ROTARY SPEED OF A ROTATING MEMBER COMPRISING; (A) A HOLLOW TORE-SHAPED BODY FILLED WITH A LIQUID HAVING A VISCOSITY INDEX NUMBER FORM ABOUT 0.5 TO 5,0; (B) MEANS FOR ATTACHING SAID HOLLOW BODY TO THE ROTARY MEMBER IS A SUBSTANTIALLY VERTICAL MANNER, SAID ROTARY MEMBER CAPABLE OF OPERATING IN A VELOCITY RANGE OF FROM ABOUT ONE OF ABOUT 100 R.P.M.; (C) A BALL OF MAGNET MATERIAL CONSTRUCTION CONTAINED WITHIN THE HOLLOW BODY, SAID BALL BEING OF SUCH SIZED AND SHAPE AS TO ALLOW THE BALL TO MOVE FREELY WITHIN THE HOLLOW BODY WHEN SAID BODY IS ROTATED, SAID BALL THEREBY ASSUMING SAME POSITION OTHER THAN THE LOWEST POINT IN THE HOLLOW BODY WHEN SAID BODY IS ROTATED, THE SAID POSITION OF THE BALL BEING THAT AT WHICH THE
Claim 2
Dependent Claim
142 words
A ROTATIONAL SPEED CONTROL SWTICH RESPONSIVE TO EITHER IN INCREASE OR DECREASE IN THE ROTARY SPEED OF A ROTATING MEMBER COMPRISING; (A) A HOLLOW TORE-SHAPED BODY FILLED WITH A LIQUID HAVING A VISCOSITY INDEX NUMBER FORM ABOUT 0.5 TO 5,0; (B) MEANS FOR ATTACHING SAID HOLLOW BODY TO THE ROTARY MEMBER IS A SUBSTANTIALLY VERTICAL MANNER, SAID ROTARY MEMBER CAPABLE OF OPERATING IN A VELOCITY RANGE OF FROM ABOUT ONE OF ABOUT 100 R.P.M.; (C) A BALL OF MAGNET MATERIAL CONSTRUCTION CONTAINED WITHIN THE HOLLOW BODY, SAID BALL BEING OF SUCH SIZED AND SHAPE AS TO ALLOW THE BALL TO MOVE FREELY WITHIN THE HOLLOW BODY WHEN SAID BODY IS ROTATED, SAID BALL THEREBY ASSUMING SAME POSITION OTHER THAN THE LOWEST POINT IN THE HOLLOW BODY WHEN SAID BODY IS ROTATED, THE SAID POSITION OF THE BALL BEING THAT AT WHICH THE
References Cited (Backward Citations)
US2755349A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-09 | 1969-11-08 | 1970-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-09 | 1973-11-08 | 1974-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-09 | 1977-11-08 | 1978-05-10 | $7700.00 | Window Closed / Lapsed |