H - Electricity – 01 – H
Patent
H - Electricity
01
H
306/305
H01H 13/70 (2006.01) B41J 5/12 (2006.01) H01H 3/12 (2006.01) H01H 13/14 (2006.01)
Patent
CA 1173479
ABSTRACT OF THE DISCLOSURE 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 key- button 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 key- button during activation of the push-button switch so that jamming of the push-button switch in a multiple button arrangement is prevented.
384625
Aktiengesellschaft Siemens
Fetherstonhaugh & Co.
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