Interposer hook drive for sewing machines
US3949690A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 12, 1975 |
| Grant date | Apr 13, 1976 |
| Priority date | — |
| Expiry date | Sep 12, 1995 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD05B57/143
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
This disclosure relates to means for providing adjustment of the needle to hook point relationship in a sewing machine without disturbing the proper mesh and timing of the gears used in the drive mechanism for the hook. The hook includes a shaft supported in a bushing which has a bore having an axis eccentric to the axis of the bushing body. An interposer member is operatively connected to the drive mechanism and is disposed coaxially with the hook shaft for transmitting driving motion to the hook shaft. The hook point is adjustable relative to the needle by means of rotation of the hook bushing about its axis which thereby changes the relative position of the hook and its shaft without causing any change in the relative driving relationship of the interposer and the drive mechanism thereby unaffecting the timing of the hook drive mechanism.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.