3657475 is referenced by 53 patents and cites 3 patents.

A position-indicating system, determining the coordinates of a point of a rface to which static force is applied, comprises a rigid plate which is fixed to the surface by means of at least three spaced-apart sensors. These sensors delivering each an output signal which is proportional to its distance from the point of application of the force. These signals are then processed in an electronic unit generating two voltages which represent the coordinates of the point of application of the force to the surface, as measured with reference to two axes determined by the three sensors.

Position-indicating system
Application Number
Publication Number
Application Date
March 17, 1970
Publication Date
April 18, 1972
Poizat Henr
Peronneau Georges
Thomson CSF Visualisation et Traitement des Informations T VT
H04n 01/00
G06F 03/33
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