Power lift for a sewing machine head
US3993008A · kind A · utility
Inventor
Key dates
| Filing date | Nov 24, 1975 |
| Grant date | Nov 23, 1976 |
| Priority date | — |
| Expiry date | Nov 24, 1995 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD05B75/06
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A sewing cabinet which includes provisions for electrically carrying a typical sewing machine head between a concealed/stowed position and at least one working position. The structure includes a carriage assembly having a platform which restingly supports the head. Peculiar structure is included for stabilizing the platform in various positions and for driving the carriage assembly therebetween. In one embodiment the carriage assembly is stabilized by a plurality of fixed upright rods which are slidably engaged by sleeve structure affixed to the carriage assembly. In this embodiment the carriage assembly is driven by a single upright externally threaded shaft protruding directly upward from a motor with internally threaded structure being affixed to the carriage assembly and threadedly engaging the shaft to selectively drive the carriage assembly up or down. In another embodiment the carriage assembly is stabilized by a plurality of externally threaded power driven mandrels. Each mandrel is threadedly engaged by a yoke which is affixed to the carriage assembly, i.e., each yoke includes an upper and lower internally threaded stabilizing control member, which provides considerable st…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.