Typewriting machines – Including type-set-assemblage mounted on carrier and... – Including type-faces movable relative to type-face-carrier
Patent
1981-06-18
1983-06-21
Sewell, Paul T.
Typewriting machines
Including type-set-assemblage mounted on carrier and...
Including type-faces movable relative to type-face-carrier
400 54, 400175, B41J 130
Patent
active
043891292
ABSTRACT:
A printer employing a daisy-type wheel. On a hub of the type wheel a pin is slidably disposed and is backwardly biased by a spring to protrude from the rear surface of the hub. In a central opening of the hub a hair pin spring having a pair of arms is disposed. The type wheel is mounted on a drive shaft of a motor through a coupling element. The coupling element is provided with a projection which is fitted into the opening of the hub and engaged with the arms of the hair pin spring by a snap action to latch the type wheel to the drive shaft in the axial direction. In the axially latched state the pin protrudes from the front surface of the hub, resisting the resilient force of the spring, by the coupling element. When the coupling element is rotated more than one turn the protruding pin is engaged with a stationary projection to prevent the type wheel from rotating, with the result that the pin is aligned with a notch formed in the coupling element and is fitted into the same for latching the type wheel to the drive shaft in the rotational direction.
REFERENCES:
patent: 3878929 (1975-04-01), Orlens et al.
patent: 3983985 (1976-10-01), Guerrini et al.
patent: 4049110 (1977-09-01), Frechette
patent: 4245916 (1981-01-01), Habich et al.
patent: 4264220 (1981-04-01), Okcuoglu
patent: 4291993 (1981-09-01), Gagnebin
patent: 4310255 (1982-01-01), Asano et al.
patent: 4314770 (1982-02-01), Harre
IBM Tech. Disc. Bulletin, by C. M. McCray, vol. 18, No. 9, Feb. 1976, pp. 2988-2989.
Brother Kogyo Kabushiki Kaisha
Sewell Paul T.
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