Sewing machines
US4426947A · kind A · utility
Inventor
Key dates
| Filing date | Jun 10, 1981 |
| Grant date | Jan 24, 1984 |
| Priority date | — |
| Expiry date | Jun 10, 2001 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD05B73/00
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
In a sewing machine having an upper presser (6), a work feed (8) disposed below and aligned with the upper presser (6), and a work support (9) about the feed mechanism (8), the feed mechanism (8) and the work support (9) are movable in unison to a raised position adjacent the upper presser and into a lowered position in which the feed mechanism is spaced further from the upper presser, the feed mechanism and the work support being resiliently loaded upwardly. In another aspect, a drive for a thread take-up element includes a rotary axially-acting cam (15,23), and a cam follower (24) coupled to the thread take-up element (25,29). In a foot-operable electrical control, primarily for an electrically powered sewing machine, there is a foot-actuatable member (35) carried by a support (33,34) and movable within a range, a locating means (42,43,44) to locate the foot-actuatable member at (and/or to urge it towards) an unconstrained rest position intermediate its range of movement, and respective electrical controls (45,46,47a,47b) operable by the foot-actuatable member (35) as it moves to one side and the other of its rest position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.