Supports: cabinet structure – For key-board writing machine – Portable
Patent
1979-08-23
1981-01-06
McCall, James T.
Supports: cabinet structure
For key-board writing machine
Portable
312 21, 312 23, 312 26, A47B 2100, A47B 8100
Patent
active
042432812
ABSTRACT:
A typewriter cabinet includes a fixed bottom, fixed sidewalls and a rear wall extending vertically from the base. A moveable front wall is hingeably connected to the base. A pair of hinged top plates serve as a top for the typewriter cabinet when the typewriter is recessed, but swing outward and serve as part of the top when the typewriter is raised and in use. A moveable shelf for holding the typewriter includes a rear backrest which supports the typewriter when it is recessed. The moveable shelf is hinged to the top of the moveable front wall and folds against the inside surface of the moveable front wall. A rotatable pivot plate has three pivot points. The first pivot point is connected to a connecting point on an edge of the moveable shelf. The second pivot is connected to a pin extending from the sidewalls. The third point is connected by means of a spring to an anchor point on the base. Tension in the spring causes the pivot plate to rotate when the top portion of the moveable front is pulled forward, causing the moveable shelf to pivot, lifting the typewriter from a recessed position to a raised, stable horizontal position.
REFERENCES:
patent: 299687 (1884-06-01), Seller
patent: 1838087 (1931-12-01), Frankel
patent: 2919966 (1960-01-01), Preston
patent: 3071424 (1963-01-01), Butter
patent: 3221803 (1965-12-01), Lambert
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