Method of making a disk-shaped armature
Abstract
Abstract A resin is printed and attached in a doughnut shape onto a copper plate to form an insulating film. A copper film is formed on the insulating film by a non-electrolytic plating method or an evaporation method. Then, the copper plate and the copper film are respectively etched in such a pattern that half turn conductors are arranged by removing the unnecessary portions, thus an armature element is obtained in which single turn conductors in two layers are arranged having an insulating film interposed therebetween. Two such armature elements are stuck together by interposing insulating sheets therebetween and connections are made between their surfaces, thereby manufacturing an armature having two turn conductors in four layers.
Inventors
- 👤 Naozi Takeda
- 👤 Tosio Tuzihara
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
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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) | 1974-11-15 | 1975-05-17 | 1975-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-15 | 1979-05-17 | 1979-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-15 | 1983-05-17 | 1983-11-16 | $7700.00 | Window Closed / Lapsed |