Brush and brush holder
Abstract
Abstract A BRUSH AND BRUSH HOLDER FOR USE WITH A CONVENTIONAL SLIP RING FOR CONDUCTING ELECTRICITY BETWEEN COMPONENTS WHEN THERE EXISTS A RELATIVE ROTATION THEREBETWEEN. THE BRUSHES ARE LOOSELY RETAINED BY SPRINGS IN A CIRCULAR BRUSH HOLDER WITH THE SPRINGS PROVIDING THE FORCE TO KEEP THE BRUSHES IN CONTACT WITH THE SLIP RING. THE BRUSHES ARE SEPARATED FROM EACH OTHER BY ONLY A FEW DEGREES OF ARC AND ARE FREE TO ROTATE WITH THE SLIP RING FOR THIS SHORT DISTANCE UNTIL THEY ABUT A STOP ON THE BRUSH HOLDER. THE BRUSHES THEMSELVES HAVE A LARGE CONTACT AREA COMPARED TO THE SPACING BETWEEN BRUSHES AND THIS FEATURE OF LARGE CONTACT AREA, COMBINED WITH THE SLIGHT FREEDOM OF MOVEMENT, PROVIDES A BI-DIRECTIONAL BRUSH STRUCTURE HAVING A LOW CURRENT DENSITY AND LONGER LIFE.
Inventors
- 👤 Glenn S Spencer
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) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |