Device for the electrical determination of two-dimensional co-or

Details Device for the electrical determination of two-dimensional co-or Device for the electrical determination of two-dimensional co-or

1975-07-02

1977-01-04

Krawczewicz, Stanley T.

Electricity: measuring and testing

Conductor identification or location

Inaccessible

324 64, G01R 2702

Patent

active

040016773

ABSTRACT:
A device for the electrical determination of two-dimensional coordinates of a point employs a plate and a scanning device. The plate is in the form of a resistance layer comprising material having a given electrical resistance which carries contact strips. Two of the contact strips may, in each case, be connected to different potentials of an electric voltage source. A potential which may be tapped at a point of the plate by means of a scanning device represents a gauge for the relative position of the point in relation to the contact strips. Varistor layers are arranged between the contact strips and the plate and at least one voltage source is provided so that the varistor layers can be connected to a voltage which is greater than a threshold potential at which the varistor layers pass from a state of low electric conductivity into a state of greatly increased conductivity.

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