Parallel guide for push-button switches with multiple buttons

Details Parallel guide for push-button switches with multiple buttons Parallel guide for push-button switches with multiple buttons

1983-05-24

1984-10-09

Burr, Edgar S.

Typewriting machines

Key-board or key lever-actuating mechanism

Key lever or space-bar mounting structure

400495, B41J 512

Patent

active

044758324

ABSTRACT:
A push-button switch device for keyboards is provided with a multiple keyboard spanning several keys of the keyboard carrier plate and a support arrangement such that operation of the keybutton is balanced even though the key-button switch may be positioned asymmetrically with respect to the multiple button. The support arrangement includes a U-shaped guide bracket which is pivotally fastened on one side in the keybutton and on the other side over the carrier plate. A guide portion is positioned in a carrier plate recess adjacent to the key housing for the push-button switch and has the same shape as the key housing, enabling the guide portion to possibly be replaced by an actual key housing to rearrange the keybutton line-up in the keyboard. The end of the guide bracket adjacent the carrier plate is connected to a support piece which is slidably supported over the upper surface of the guide portion. A guide tongue extends beneath the keybutton through a guide aperture formed in the guide portion. This arrangement serves to align movement of the keybutton during activation of the push-button switch so that jamming of the push-button switch in a multiple button arrangement is prevented.

REFERENCES:
patent: 3711685 (1973-01-01), Castle
patent: 3720801 (1973-03-01), Yanaga
patent: 4188136 (1980-02-01), Bedocs

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