Electric motor armature with stress relieved, resilient commutator lead connections
Abstract
Abstract An armature for an electric motor has commutator segments, an armature coil structure consisting of coils having end portion which lead to the commutator segments and each of which has a looped part adjacent the associated commutator segment, and sleeves of yieldable resilient material snugly surrounding the looped parts. A moulded rigid mass of resinous material extends locally only in the region of the commutator and encapsulates the sleeves parts of the coil end portions and the connections of the end portions to the commutator segments. The yieldable nature of the sleeves permits a degree of relative movement of the looped parts within the moulded mass. A thin layer trickle coating of an electrically insulating material encases the parts of the coil structure not encapsulated in said mass.
Inventors
- 👤 Albert Norman Roue
Bibliographic Details
Claims Analysis
Total Claims: 3References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-10 | 1976-04-10 | 1976-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-10 | 1980-04-10 | 1980-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-10 | 1984-04-10 | 1984-10-10 | $7700.00 | Window Closed / Lapsed |