Computer graphics processing and selective visual display system – Display peripheral interface input device – Including keyboard
Patent
1991-02-15
1995-12-26
Hjerpe, Richard
Computer graphics processing and selective visual display system
Display peripheral interface input device
Including keyboard
345157, G09G 302
Patent
active
054791928
ABSTRACT:
A multifunction space bar for control of a video screen graphics cursor for replacement of, or as a supplement to, a second peripheral pointing device without keyboard modification. The device is a conventional space bar replacement and fits within the confines of conventional keyboards allowing the retro-fit of existing keyboards. The device is capable of supplying information signals determining rotational, sliding, and switch depression movements for control of video screen graphics cursor on a microprocessor based computer system having bus input control electronics for receipt of supply information signals. The device utilizes a positioner slidably secured to a cylindrical bar whereby rotation of the positioner generates a directional signal control of the graphic cursor along the y-axis. Slidable movement of the positioner longitudinally along the length of the cylindrical bar generates a directional signal for control of the graphic cursor along the x-axis. Both signals can be operated simultaneously. A plurality of switches are placed on the front of the device's support structure providing mouse button emulation and disabling/enabling for operation as a supplemental device.
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Carroll, Jr. George L.
Slavin Michael A.
Hjerpe Richard
Wu Xiao M.
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