Chairs and seats – Back movement resiliently opposed in operating position – Constantly oriented during up-and-down movement
Patent
1977-04-04
1978-10-31
Mitchell, James C.
Chairs and seats
Back movement resiliently opposed in operating position
Constantly oriented during up-and-down movement
A47C 300
Patent
active
041231031
ABSTRACT:
This invention discloses a novel chair control for use with a tiltable stenographer's chair. It discloses a compact and improved biasing means to control the movement of the movable frame member, this biasing means being a U-shaped bolt with two helical springs thereon, inserted from the front of the chair control about which the movable frame member pivots. This new biasing means eliminates unsightly handwheels and associated mechanisms hanging down from the control and provides an extremely compact device. Also disclosed is a wrench permanently carried by the biasing means for adjustment thereof, the wrench folding out of the way after use. A second biasing means is disclosed which depends from the plate affixed to the seat and eliminates unsightly mechanisms from the front of the control. The chair controls of all the embodiments include a movable frame member which includes a downwardly depending portion at the rear of the first bracket which is affixed to the fixed frame portion which strengthens the control thereby reducing damage to the control caused by continual use.
REFERENCES:
patent: 1336510 (1920-04-01), Collier
patent: 2093319 (1937-09-01), Herold
patent: 2901027 (1959-08-01), Dickson
patent: 3352526 (1967-11-01), Anderson
patent: 3356414 (1967-12-01), Doerner
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