Typing machine key action

Details Typing machine key action Typing machine key action

1974-08-28

1976-09-21

Grieb, Wm. H.

Textiles: fiber preparation

B41J 2306

Patent

active

039813851

ABSTRACT:
An interposer in a typing machine key action is supported by an arcuate spring and a shelf. When a key lever bears against the arcuate spring to release the interposer from the shelf, the arcuate spring snaps the interposer against a pawl that engages a power roll to initiate a typing operation. Potential energy is restored to the arcuate spring as the key lever lifts the interposer back to rest position. The arcuate spring serves as a support and frictionless pivot for the interposer and biases the interposer against the shelf while providing energy to impel the interposer against the pawl.

REFERENCES:
patent: 3400799 (1968-09-01), Stuiber
patent: 3419123 (1968-12-01), Salzberger et al.
patent: 3537562 (1970-11-01), Caudill et al.
patent: 3578128 (1971-05-01), Frechette et al.
patent: 3623587 (1971-11-01), Link
patent: 3633723 (1972-01-01), Kosters
patent: 3638775 (1972-02-01), Hishida et al.
patent: 3706366 (1972-12-01), Hishida et al.
patent: 3738470 (1973-06-01), Osaka
patent: 3838762 (1974-10-01), Madison

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