Floating Base Plate Touch Sensor for a CRT
Original Publication Date: 1986-Apr-01
Included in the Prior Art Database: 2005-Mar-08
Several touch-sensitive CRT panel devices exist in the marketplace. This disclosure describes another design for meeting the requirements of a touch-sensitive panel on the CRT display which does not involve placing anything over the face of the display at all. This design is a floating base plate mounted on spherical balls or friction-free pads that remove all but normal forces from application to an array of static sensors. The sensors are preferably strain gauge devices capable of sustaining a steady output under load. Fig. 1 illustrates a side view of a CRT 1 mounted on a base plate 2 that is supported within a tray 5 on support balls 3 that apply forces to the sensors 7. Fig. 2 illustrates a plan view of the balls 3 identified as 3A, 3B and 3C. Fixed stop members 6 are attached to the floating base plate 2.