Patent US3306997A successfully refreshed from Google Patents.
US3306997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Limit switch control for a motor drive
Assignee: Franklin Electric Co Inc
•
Filing: 1965-05-06
•
Granted: 1967-02-28
•
Expires: 1985-05-06
Abstract
No abstract record available.
Inventors
- 👤 David R Jacobs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:49
CPC Classifications
H; H01; H01H; H01H19/00; H01H19/54; H01H19/60; H01H19/63; H02; H02K; H02K17/00; H02K17/02; H02K17/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
A LIMIT SWITCH CONTROL FOR A MOTOR DRIVE UNIT, COMPRISING A ROTATABLY MOUNTED LIMIT SHAFT, A PAIR OF CAM MEMBERS ON SAID LIMIT SHAFT, A PAIR OF LIMIT SWITCHES POSITIONED ADJACENT SAID MEMBERS AND ADAPTED TO BE ACTUATED BY THE RESPECTIVE CAM MEMBERS ON ROTATION OF THE LATTER, ONE OF SAID CAM MEMBERS BEING SECURED TO SAID LIMIT SHAFT FOR ROTATION THEREWITH, ONE OF SAID CAM MEMBERS INCLUDING A WORM WHEEL, A WORM FOR DRIVING SAID WORM WHEEL, SAID CAM MEMBERS HAVING ADJACENT END FACES PROVIDED WITH INTERENGAGING TEETH, AND SPRING MEANS TENDING TO MOVE ONE OF SAID CAM MEMBERS AXIALLY TOWARD THE OTHER TO EFFECT ENGAGEMENT OF SAID TEETH, SAID
Claim 2
Dependent Claim
111 words
A LIMIT SWITCH CONTROL FOR A MOTOR DRIVE UNIT, COMPRISING A ROTATABLY MOUNTED LIMIT SHAFT, A PAIR OF CAM MEMBERS ON SAID LIMIT SHAFT, A PAIR OF LIMIT SWITCHES POSITIONED ADJACENT SAID MEMBERS AND ADAPTED TO BE ACTUATED BY THE RESPECTIVE CAM MEMBERS ON ROTATION OF THE LATTER, ONE OF SAID CAM MEMBERS BEING SECURED TO SAID LIMIT SHAFT FOR ROTATION THEREWITH, ONE OF SAID CAM MEMBERS INCLUDING A WORM WHEEL, A WORM FOR DRIVING SAID WORM WHEEL, SAID CAM MEMBERS HAVING ADJACENT END FACES PROVIDED WITH INTERENGAGING TEETH, AND SPRING MEANS TENDING TO MOVE ONE OF SAID CAM MEMBERS AXIALLY TOWARD THE OTHER TO EFFECT ENGAGEMENT OF SAID TEETH, SAID
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) | 1970-02-27 | 1970-08-29 | 1971-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-27 | 1974-08-29 | 1975-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-27 | 1978-08-29 | 1979-02-28 | $7700.00 | Window Closed / Lapsed |