Patents Represented by Law Firm 30das & Parry
  • Variable keystroke pressure apparatus
    Patent number: 4795888
    Abstract: A keybaord which is capable of varying the pressure required for the keystroke is provided and comprises an inflatable arrangement being a variable pressure bladder which fits over the keyboard between the base plate and the keys. 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.
    Type: Grant
    Filed: July 13, 1987
    Date of Patent: January 3, 1989
    Assignee: A & K MacFarlane Pty. Ltd.
    Inventor: Andrew R. MacFarlane