US3224076A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a commutator
Assignee: Electric Materials Co
•
Filing: 1962-03-01
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Granted: 1965-12-21
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Expires: 1982-03-01
Abstract
No abstract record available.
Inventors
- 👤 Jr James L Johnson
- 👤 Lloyd J Krull
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:23
CPC Classifications
H; H01; H01R; H01R43/00; H01R43/06; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49009; Y10T29/49011; Y10T29/4998
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
A METHOD OF MAKING A COMMUTATOR COMPRISING PROVIDING A BUILDING RING HAVING A GENERALLY CYLINDRICAL HOLLOW WITH PERIPHERALLY SPACED AXIALLY EXTENDING GROOVES IN THE INNER PERIPHERY THEREOF FOR RECEIVING FINS ONU COMMUTATOR BARS, PROVIDING COMMUTATOR BARS HAVING FINS ON ONE SIDE EDGE AND AXIALLY EXTENDING NOTCHES IN THEIR ENDS, INSERTING SAID COMMUTATOR BARS IN SAID RING WITH SAID FINS IN SAID GROOVES WHEREBY SAID BARS ARE HELD IN CIRCUMFERENTIALLY SPACED RELATION, APPLYING AN IMPREGNATED GLASS TAPE IN SAID NOTCHES THEREBY FORMING A BAND LOCATING SAID COMMUTATOR BARS AGAINST RADIAL MOVEMENT, CLOSING SAID BUILDING RING BY APPLICATION OF A TOP PLATE AND A BOTTOM PLATE, SAID TOP PLATE BEING PROVIDE WITH AND APERTURE, FILLING SAID SPACES BETWEEN SAID BARS WITH AN EPOXY RESIN, THROUGH SAID APERTURE, CURING SAID RESIN, REMOVING SAID RING AND COVER PLATES AND REMOVING SAID FINS FROM SAID BARS.
Claim 2
Independent Claim
141 words
A METHOD OF MAKING A COMMUTATOR COMPRISING PROVIDING A BUILDING RING HAVING A GENERALLY CYLINDRICAL HOLLOW WITH PERIPHERALLY SPACED AXIALLY EXTENDING GROOVES IN THE INNER PERIPHERY THEREOF FOR RECEIVING FINS ONU COMMUTATOR BARS, PROVIDING COMMUTATOR BARS HAVING FINS ON ONE SIDE EDGE AND AXIALLY EXTENDING NOTCHES IN THEIR ENDS, INSERTING SAID COMMUTATOR BARS IN SAID RING WITH SAID FINS IN SAID GROOVES WHEREBY SAID BARS ARE HELD IN CIRCUMFERENTIALLY SPACED RELATION, APPLYING AN IMPREGNATED GLASS TAPE IN SAID NOTCHES THEREBY FORMING A BAND LOCATING SAID COMMUTATOR BARS AGAINST RADIAL MOVEMENT, CLOSING SAID BUILDING RING BY APPLICATION OF A TOP PLATE AND A BOTTOM PLATE, SAID TOP PLATE BEING PROVIDE WITH AND APERTURE, FILLING SAID SPACES BETWEEN SAID BARS WITH AN EPOXY RESIN, THROUGH SAID APERTURE, CURING SAID RESIN, REMOVING SAID RING AND COVER PLATES AND REMOVING SAID FINS FROM SAID BARS.
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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) | 1968-12-20 | 1969-06-21 | 1969-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-20 | 1973-06-21 | 1973-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-20 | 1977-06-21 | 1977-12-21 | $7700.00 | Window Closed / Lapsed |