Patent US3309548A successfully refreshed from Google Patents.
US3309548A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Armature lead connections
Assignee: Black and Decker Corp
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Filing: 1964-09-02
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Granted: 1967-03-14
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Expires: 1984-09-02
Abstract
No abstract record available.
Inventors
- 👤 Carroll L Gough
- 👤 Robert E Dorsee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:00
CPC Classifications
H; H01; H01R; H01R39/00; H01R39/02; H01R39/32; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49009; Y10T29/49011
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
199 words
IN AN ARMATURE FOR A COMMUTATOR-TYPE OF ELECTRIC MOTOR WHICH IS SUBJECTED TO VIBRATIONAL FORCES IN USAGE, WHEREIN THE ARMATURE IS PROVIDED WITH AN ARMATURE SHAFT, A STACK OF LAMINATIONS, AND A PLURALITY OF CONVENTIONAL WINDINGS IN RESPECTIVE WINDING SLOTS FORMED THEREIN, AND FURTHER IS PROVIDED WITH A RESPECTIVE PLURALITY OF COMMUTATOR SEGMENTS WITH RESPECTIVE LEADS CONNECTING THE SEGMENTS TO THE WINDINGS, THE IMPROVEMENT IN MEANS TO PREVENT LEAD BREAKAGE, WHICH COMPRISES: (A) EACH LEAD BEING BROUGHT AROUND TO ITS RESPECTIVE COMMUTATOR SEGMENT IN A POSITION WHICH IS APPROXIMATELY 180 DEGREES AWAY, CIRCUMFERENTIALLY, FROM ITS WINDING SLOT ON THE ARMATURE, THEREBY DELIBERATELY INCREASING THE LENGTH OF THE LEAD WHICH MAY ASCOMMODATE AND ABSORB RELATIVELY-HIGH VIBRATIONAL FORCES IMPOSED UPON THE ARMATURE; AND EACH LEAD BEING DISPOSED IN AS CLOSE AS POSSIBLE TO THE ARMATURE SHAFT, WHEREBY THE VARIOUS LEADS ARE IN EFFECT TWISTED ABOUT THE ARMATURE SHAFT WITH SUBSTANTIALLY NO CLEARANCE THEREBETWEEN; (B) A SKEWED SLOT FORMED IN EACH OF THE COMMUTATOR SEGMENTS; AND (C) THE FREE END OF EACH LEAD BEING SECURED WITHIN THE SKEWED SLOT OF ITS RESPECTIVE SEGMENT ON THE COMMUTATOR, THE SKEWED DESIGN OF THE SLOT FURTHER ACCOMMODATING THE IMPOSITION OF VIBRATIONAL FORCES ON THE ARMATURE.
Claim 2
Dependent Claim
199 words
IN AN ARMATURE FOR A COMMUTATOR-TYPE OF ELECTRIC MOTOR WHICH IS SUBJECTED TO VIBRATIONAL FORCES IN USAGE, WHEREIN THE ARMATURE IS PROVIDED WITH AN ARMATURE SHAFT, A STACK OF LAMINATIONS, AND A PLURALITY OF CONVENTIONAL WINDINGS IN RESPECTIVE WINDING SLOTS FORMED THEREIN, AND FURTHER IS PROVIDED WITH A RESPECTIVE PLURALITY OF COMMUTATOR SEGMENTS WITH RESPECTIVE LEADS CONNECTING THE SEGMENTS TO THE WINDINGS, THE IMPROVEMENT IN MEANS TO PREVENT LEAD BREAKAGE, WHICH COMPRISES: (A) EACH LEAD BEING BROUGHT AROUND TO ITS RESPECTIVE COMMUTATOR SEGMENT IN A POSITION WHICH IS APPROXIMATELY 180 DEGREES AWAY, CIRCUMFERENTIALLY, FROM ITS WINDING SLOT ON THE ARMATURE, THEREBY DELIBERATELY INCREASING THE LENGTH OF THE LEAD WHICH MAY ASCOMMODATE AND ABSORB RELATIVELY-HIGH VIBRATIONAL FORCES IMPOSED UPON THE ARMATURE; AND EACH LEAD BEING DISPOSED IN AS CLOSE AS POSSIBLE TO THE ARMATURE SHAFT, WHEREBY THE VARIOUS LEADS ARE IN EFFECT TWISTED ABOUT THE ARMATURE SHAFT WITH SUBSTANTIALLY NO CLEARANCE THEREBETWEEN; (B) A SKEWED SLOT FORMED IN EACH OF THE COMMUTATOR SEGMENTS; AND (C) THE FREE END OF EACH LEAD BEING SECURED WITHIN THE SKEWED SLOT OF ITS RESPECTIVE SEGMENT ON THE COMMUTATOR, THE SKEWED DESIGN OF THE SLOT FURTHER ACCOMMODATING THE IMPOSITION OF VIBRATIONAL FORCES ON THE ARMATURE.
Claim 3
Dependent Claim
28 words
THE IMPROVEMENT OF CLAIM 1, WHEREIN: (A) EACH LEAD IS BROUGHT AROUND IN THE DIRECTION OF ROTATION; AND (B) EACH SLOT IS SKEWED IN THE DIRECTION OF ROTATION.
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) | 1970-03-13 | 1970-09-12 | 1971-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-13 | 1974-09-12 | 1975-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-13 | 1978-09-12 | 1979-03-14 | $7700.00 | Window Closed / Lapsed |