US3135842A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal switch
Assignee: Individual
•
Filing: 1960-02-01
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Granted: 1964-06-02
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Expires: 1980-02-01
Abstract
No abstract record available.
Inventors
- 👤 Harrison D Brailsford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:24
CPC Classifications
H; H01; H01H; H01H35/00; H01H35/06; H01H35/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
219 words
A BALANCED GOVERNOR FOR AN ELECTRIC MOTOR COMPRISING A ROTATING SHAFT, AT LEAST ONE DRIVING COIL, AND A PAIR OF RELATIVELY FIXED CONTACTS, AT LEAST ONE OF SAID CONTACTS BEING CONNECTED TO SAID COIL, SAID GOVERNOR COMPRISING: A BASE MEMBER FOR ATTACHMENT TO SAID ROTATING SHAFT; A PAIR OF WEIGHTS PIVOTALLY ATTACHED TO POINTS OF SAID MEMBER ON OPPOSITE SIDES OF SAID SHAFT, SAID PIVOT POINTS BEING REMOVED FROM THE CENTER OF ROTATION OF SAID MEMBER TO PERMIT SAID WEIGHT TO PIVOT AWAY FROM THE CENTER OF SAID MEMBER AS SAID MEMBER ROTATES; SPRING MEANS BIASING SAID WEIGHTS INWARDLY TOWARD THE CENTER OF ROTATION OF SAID MEMBER; A PAIR OF ARMS, EACH OF SAID ARMS BEING ATTACHED TO ONE OF SAID WEIGHTS TO PIVOT THEREWITH AND EACH OF SAID ARMS EXTENDING ON THE OPPOSITE SIDE OF THE CENTER OF ROTATION OF SAID MEMBER FROM THE WEIGHT TO WHICH IT IS ATTACHED, WHEREBY, AS SAID WEIGHTS PIVOT IN RESPONSE TO THE CENTRIFUGAL FORCE DEVELOPED DURING ROTATION OF SAID MEMBER, EACH OF SAID ARMS SWINGS TOWARD THE CENTER OF ROTATION OF SAID MEMBER; AND A PAIR OF MOVING CONTACTS, ONE OF SAID CONTACTS BEING LOCATED ON EACH OF SAID ARMS, RESPECTIVELY, TO MAKE CONNECTION IN ALTERNATION WITH SAID RELATIVELY FIXED CONTACTS TO PERMIT SAID DRIVING COIL TO RECEIVE ELECTRIC CURRENT INTERMITTENTLY.
Claim 2
Dependent Claim
219 words
A BALANCED GOVERNOR FOR AN ELECTRIC MOTOR COMPRISING A ROTATING SHAFT, AT LEAST ONE DRIVING COIL, AND A PAIR OF RELATIVELY FIXED CONTACTS, AT LEAST ONE OF SAID CONTACTS BEING CONNECTED TO SAID COIL, SAID GOVERNOR COMPRISING: A BASE MEMBER FOR ATTACHMENT TO SAID ROTATING SHAFT; A PAIR OF WEIGHTS PIVOTALLY ATTACHED TO POINTS OF SAID MEMBER ON OPPOSITE SIDES OF SAID SHAFT, SAID PIVOT POINTS BEING REMOVED FROM THE CENTER OF ROTATION OF SAID MEMBER TO PERMIT SAID WEIGHT TO PIVOT AWAY FROM THE CENTER OF SAID MEMBER AS SAID MEMBER ROTATES; SPRING MEANS BIASING SAID WEIGHTS INWARDLY TOWARD THE CENTER OF ROTATION OF SAID MEMBER; A PAIR OF ARMS, EACH OF SAID ARMS BEING ATTACHED TO ONE OF SAID WEIGHTS TO PIVOT THEREWITH AND EACH OF SAID ARMS EXTENDING ON THE OPPOSITE SIDE OF THE CENTER OF ROTATION OF SAID MEMBER FROM THE WEIGHT TO WHICH IT IS ATTACHED, WHEREBY, AS SAID WEIGHTS PIVOT IN RESPONSE TO THE CENTRIFUGAL FORCE DEVELOPED DURING ROTATION OF SAID MEMBER, EACH OF SAID ARMS SWINGS TOWARD THE CENTER OF ROTATION OF SAID MEMBER; AND A PAIR OF MOVING CONTACTS, ONE OF SAID CONTACTS BEING LOCATED ON EACH OF SAID ARMS, RESPECTIVELY, TO MAKE CONNECTION IN ALTERNATION WITH SAID RELATIVELY FIXED CONTACTS TO PERMIT SAID DRIVING COIL TO RECEIVE ELECTRIC CURRENT INTERMITTENTLY.
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) | 1967-06-02 | 1967-12-02 | 1968-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-02 | 1971-12-02 | 1972-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-02 | 1975-12-02 | 1976-06-02 | $7700.00 | Window Closed / Lapsed |