Shaft position controlling system
US3987282A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 22, 1975 |
| Grant date | Oct 19, 1976 |
| Priority date | — |
| Expiry date | Apr 22, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B2219/42182
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
There is disclosed a typewriter using a single element print head wherein the tilt and rotate positions for character selection are obtained by servo systems driving tilt and rotate shafts. The system utilizes a digital multiplexing system whereby common elements in the servo channels are time shared. One common element is a binary arithmetic unit which compares binarily represented actual and desired position values of the shafts to fetch from a memory desired velocity information. The fetched velocity information in binary form is compared with the binarily represented actual velocity of the shafts to generate signals for energizing the servo motors which drive the shafts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.