US3308320A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Commutators
Assignee: IDM Electronics Ltd
•
Filing: 1964-02-28
•
Granted: 1967-03-07
•
Expires: 1984-02-28
Abstract
No abstract record available.
Inventors
- 👤 Spencer Dennis Lincoln
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:02
CPC Classifications
H; H01; H01H; H01H1/00; H01H1/12; H01H1/14; H01H1/16; H01H19/00; H01H19/54; H01H19/56; H01H19/58; H01H3/00; H01H3/004
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
AN ELECTRICAL COMMUTATOR DEVICE COMPRISING A STATIONARY MEMBER FORMED WITH A PLURALITY OF SPACED COMMUTATOR SEGMENTS AND AN ECCENTRICALLY MOUNTED REVOLVABLE CONTACT MEMBER MOUNTED ON A DRIVEN SHAFT AND BIASED INTO CONTACT WITH AND ARRANGED TO WIPE OVER THE COMMUTATOR SEGMENTS, MEANS FOR CONSTRAINING THE ROTATION OF THE REVOLVABLE CONTACT MEMBER ABOUT ITS OWN AXIS
Claim 2
Dependent Claim
55 words
AN ELECTRICAL COMMUTATOR DEVICE COMPRISING A STATIONARY MEMBER FORMED WITH A PLURALITY OF SPACED COMMUTATOR SEGMENTS AND AN ECCENTRICALLY MOUNTED REVOLVABLE CONTACT MEMBER MOUNTED ON A DRIVEN SHAFT AND BIASED INTO CONTACT WITH AND ARRANGED TO WIPE OVER THE COMMUTATOR SEGMENTS, MEANS FOR CONSTRAINING THE ROTATION OF THE REVOLVABLE CONTACT MEMBER ABOUT ITS OWN AXIS
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) | 1970-03-06 | 1970-09-05 | 1971-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-06 | 1974-09-05 | 1975-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-06 | 1978-09-05 | 1979-03-07 | $7700.00 | Window Closed / Lapsed |