Drive mechanism including a one-way spring clutch for a typewriter
US4538931A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 4, 1983 |
| Grant date | Sep 3, 1985 |
| Priority date | — |
| Expiry date | Jan 4, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/1524
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A drive mechanism for a member to be driven in one direction is disclosed. The mechanism is incorporated in an electronic typewriter and includes a clutch including a clutch spring which provides a driving connection between a small DC motor and the member to be driven of the typewriter. Means is provided which normally holds a driven member of the clutch to a particular angular position and, when the motor is energized, it releases the driven member to allow the driven member to be rotated by the motor. After a cycle of rotation of the driven member, the holding means positively stops rotation of the second element and hence of the driving member and the motor. A new and efficient ribbon feed mechanism is also disclosed which enables selective use of a carbon ribbon and a fabric ink ribbon depending upon a cassette mounted thereon.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.