Method and apparatus for controlling a rotation dobby
US4552184A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 2, 1983 |
| Grant date | Nov 12, 1985 |
| Priority date | — |
| Expiry date | Dec 2, 2003 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD03C1/00
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A dobby includes a needle mechanism having a reading needle, the head of which, during reading of a nonperforated location on a pattern card, engages a pawl and, during reading of a hole in the card, releases the pawl to permit the pawl, under the force of a spring, to tilt about an axle and in this manner to have a surface thereof disposed in front of an edge of a key-shifting gate. During the operating movement of the axle, the pawl pushes the key-shifting gate, which slides in rectilinear guides, wherein a key is carried along by a cam which encircles the opening for the shaft 1. The key is radially movably supported on the eccentric ring and engages one of two openings on the connecting rod, which results in a standstill of the heddle frame, or engages one of two grooves in the drive shaft. In the latter case, the drive shaft carries the key and the eccentric ring along as it rotates and moves the connecting rod, which triggers a movement of the heddle frame. The key is thus moved in a direction which is reversed with respect to the direction of movement of the reading needle by means of the pawl, which serves as a power-amplifying member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.