(under subclass 68) Subject matter including a flexible or deformable unitary mass of resistance material together with structure for modifying the shape of the mass, as by increasing the length or reducing the cross sectional area of the mass between terminals, to change the resistance value between the terminals.
(1) Note. The mass may be granular. However, where the resistance value is changed by changing the surface pressure between the grains classification is in subclass 100 above. In this subclass (114) the shape of the resistance element itself is changed to modify the resistance value between the terminals.
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2+, for strain gauge type resistors.
99+, for variable resistors whose surfaces are presses together, variation in the pressure changing the resistance value between terminals.
