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Electronic Keyboard Shift Lock Mechanism Disclosure Number: IPCOM000068970D
Original Publication Date: 1978-Mar-01
Included in the Prior Art Database: 2005-Feb-20

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Harris, RH [+details]


Fig. 1 illustrates, in partial cross section, the basic mechanisms for implementing an equivalent typewriter shift lock and shift function on an electronic keyboard 1. Electronic keyboard 1 comprises well-known electrical circuitry and switch key actuators 2 which produce the required electrical signal outputs from the keyboard in a well-known manner. The shift and shift-lock key buttons are molded together in an integral unit 3 attached to the movable stem 4 of the key module 2, as shown. The shift button 5 and the shift-lock button 6 are positioned as they are normally provided in typewriter keyboards. The surface of stem 4, identified by numeral 7, is slightly concave. On the concave surface 7 the underside of the key button 3 resides in a slidingly supported manner.