Microprocessor controlled D.C. motor for controlling print value selection means
US4646635A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 4, 1984 |
| Grant date | Mar 3, 1987 |
| Priority date | — |
| Expiry date | Oct 4, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07B2017/00548
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
In printing apparatus including structure for changing a value to be printed and structure for selecting a value to be printed, wherein the former includes a plurality of banks, each of which includes a print wheel having a plurality of print elements, and the latter includes structure for selecting each bank and structure for selecting each print element of a selected bank, and structure for driving the bank and print element selection structure, wherein the driving structure includes an output shaft, and structure for selectively coupling the shaft to the bank and print element selection structure, the improvement for controlling the value selection structure, the improvement comprising: the driving structure including a d.c. motor having the output shaft; structure for sensing angular displacement of the shaft; a microprocessor comprising clock structure for generating successive sampling time periods, structure for providing first counts respectively representative of successive desired angular displacements of the shaft, structure responsive to the sensing structure for providing second counts respectively representative of actual angular displacements of the shaft, and struct…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.