Supports: cabinet structure – Disappearing-instrument type – Combined closure and support
Patent
1977-06-20
1978-08-22
Stein, Mervin
Supports: cabinet structure
Disappearing-instrument type
Combined closure and support
312 27, 312 30, 1122171, A47B 8100
Patent
active
041085124
ABSTRACT:
A mechanism for mounting a free arm sewing machine in a work cabinet such that the machine is selectively supported in an upper work position wherein the free arm is positioned above the work surface of the cabinet, a lower work position wherein the free arm is substantially flush with the cabinet work surface, and a storage position wherein the machine is disposed completely beneath the work surface in a space efficient manner. The assembly comprises a base or platform to which the machine is mounted, a rear pivot arm rotatably secured to the platform and to the cabinet, a front pivot arm also pivotally secured to the platform and to the cabinet, and a pair of stops mounted to the cabinet and positioned within the vertical planes of rotation of the front pivot arms so that the front pivot arm and platform are supported against gravity in the lower use position. The stops include cam surfaces which enable the sides of the front pivot arm to ride over them when the machine is raised from the storage position. In order to lower the machine from the lower work position to the storage position, the machine and platform are tilted so as to urge the front and rear pivot arms to positions which are mutually coplanar thereby causing a binding action to occur which pulls the front pivot arms inwardly over the stops and enables the platform to drop to the storage position.
REFERENCES:
patent: RE28835 (1976-06-01), Roberts et al.
patent: 1057809 (1913-04-01), Diehl et al.
patent: 3264046 (1966-08-01), Preuss
patent: 3468589 (1969-09-01), Maynard
patent: 3870386 (1975-03-01), Shepherd
patent: 3918780 (1975-11-01), Fritts
patent: 3986755 (1976-10-01), Kohara
patent: 3993008 (1976-11-01), Parsons Sr.
patent: 4005918 (1977-01-01), Smith et al.
Hoffman John F.
Jeffers Albert L.
Sakran Victor N.
Stein Mervin
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