Selective positioning system particularly for controlling guide bars of knitting machines
US3978690A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 15, 1975 |
| Grant date | Sep 7, 1976 |
| Priority date | — |
| Expiry date | Jan 15, 1995 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD04B27/26
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Knitting-machine guide bars, which carry columns of guides through and then along a row of knitting needles and are moved longitudinally along the row on the basis of the content of a programmable read-only memory. Stepping motors which respond to the memory rotate pinions in directions and numbers of steps determined by the memory. Racks engaging the pinions articulate respective adjustable-leverage levers which reciprocate the separate guide bars longitudinally along the row. Respective springs press each rack against each pinion transverse to the rack length so as to eliminate slack. Longitudinal movement of the bars is synchronized with their transverse movements through the needle row by sensing when the guides clear the front of the needles and producing a synchronizing pulse that gates appropriate signals from memory buffers to the motors; and producing a synchronizing pulse on a separate channel when the guides are clear of the rear of the needles. Braking means brake the motors with torques of about 50% of the maximum motor torques.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.