Variable keystroke pressure apparatus.

摘要

A keyboard which is capable of varying the pressure required for the keystroke is provided and comprises an inflatable means (10) being a variable pressure bladder (11) which fits over the keyboard between the base plate (12) and the keys (13). The operator may vary the pressure delivered to the system as desired and may also preset a cycle of time intervals with pressure <<on>> and pressure <<off>>.
<??>Alternatively, the pressure supply may be linked to a number of keyboards and a programmed variable pressure cycle will be delivered to all the keyboards.