US3087038A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric current interchange contact
Assignee: Individual
•
Filing: 1959-10-19
•
Granted: 1963-04-23
•
Expires: 1979-10-19
Abstract
No abstract record available.
Inventors
- 👤 Raymond W Bethke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:13
CPC Classifications
H; H01; H01R; H01R35/00; H01R35/04; H01H; H01H1/00; H01H1/58; H01H1/5833; H01H33/00; H01H33/02; H01H33/025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
IN ELECTRICAL APPARATUS, CURRENT INTERCHANGE MEANS COMPRISING A PAIR OF RELATIVELY MOVABLE CONDUCTIVE MEMBERS, MEANS ASSOCIATED WITH SAID MEMBERS FOR PROVIDING AN ELONGATE CHANNEL HAVING ITS OPEN SIDE DISPOSED TOWARD ONE OF SAID MEMBERS, A HELICAL SPRING CONTACT DISPOSED IN SAID CHANNEL, THE NORMAL DISTANCE BETWEEN SAID MEMBERS AND ACROSS SAID CHANNEL BEING SUBSTANTIALLY UNIFORM, SAID DISTANCE BEING LESS THAN THE OUTSIDE HELICAL DIAMETER OF THE CONVOLUTIONS OF SAID SPRING TO INCLINE SAID CONVOLUTIONS AT AN ANGLE RELATIVE TO THE HELICAL AXIS OF SAID SPRING SO THAT THE RESILIENCY OF SAID SPRING NORMALLY HOLDS SAID CONVOLUTIONS IN FIRM ELECTRICAL CONTACT WITH SAID MEMBERS, THE WIDTH OF SAID CHANNEL IN THE DIRECTION OF RELATIVE MOVEMENT EXCEEDING THE DIAMETER OF SAID CONVOLUTIONS SO THAT SAID SPRING ROLLS DURING SAID MOVEMENT WHEREBY ROLLING FRICTION IS ENCOUNTERED BETWEEN SAID MEMBERS AND SAID SPRING CONTACT.
Claim 2
Dependent Claim
140 words
IN ELECTRICAL APPARATUS, CURRENT INTERCHANGE MEANS COMPRISING A PAIR OF RELATIVELY MOVABLE CONDUCTIVE MEMBERS, MEANS ASSOCIATED WITH SAID MEMBERS FOR PROVIDING AN ELONGATE CHANNEL HAVING ITS OPEN SIDE DISPOSED TOWARD ONE OF SAID MEMBERS, A HELICAL SPRING CONTACT DISPOSED IN SAID CHANNEL, THE NORMAL DISTANCE BETWEEN SAID MEMBERS AND ACROSS SAID CHANNEL BEING SUBSTANTIALLY UNIFORM, SAID DISTANCE BEING LESS THAN THE OUTSIDE HELICAL DIAMETER OF THE CONVOLUTIONS OF SAID SPRING TO INCLINE SAID CONVOLUTIONS AT AN ANGLE RELATIVE TO THE HELICAL AXIS OF SAID SPRING SO THAT THE RESILIENCY OF SAID SPRING NORMALLY HOLDS SAID CONVOLUTIONS IN FIRM ELECTRICAL CONTACT WITH SAID MEMBERS, THE WIDTH OF SAID CHANNEL IN THE DIRECTION OF RELATIVE MOVEMENT EXCEEDING THE DIAMETER OF SAID CONVOLUTIONS SO THAT SAID SPRING ROLLS DURING SAID MOVEMENT WHEREBY ROLLING FRICTION IS ENCOUNTERED BETWEEN SAID MEMBERS AND SAID SPRING CONTACT.
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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) | 1966-04-22 | 1966-10-22 | 1967-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-22 | 1970-10-22 | 1971-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-22 | 1974-10-22 | 1975-04-23 | $7700.00 | Window Closed / Lapsed |