Printwheel detent disengaging apparatus
US4864924A · kind A · utility
10Cited by
8References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 21, 1987 |
| Grant date | Sep 12, 1989 |
| Priority date | — |
| Expiry date | Dec 21, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/20636
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A printwheel detent disengaging mechanism enables low-torque high-speed automatic printwheel setting. In the engaged position spring-loaded ball in a rotatable shaft bears on a detent ball disposed in a bore in a sleeve surrounding the shaft to cam the detent ball into detent vees of the printwheel. When the shaft is rotated so that the spring-laded ball no longer bears on the detent ball, the detent force is removed and low torque printwheel setting may be accomplished. When setting is completed, the shaft is rotated back into position where the spring-loaded ball bears on the detent ball.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.