Electronic pressure sensitive force transducer

A bounceless switch apparatus having a surface contact resistance which varies inversely with a pressure applied normally thereto comprising:

• a first conductor member;
• a first pressure sensitive layer including a semiconducting material disposed for covering the first conductor member in intimate electrically conducting contact therewith and further having a first surface having a multiplicity of microprotrusions extending therefrom;
• a second conductor member;
• and
• a second pressure sensitive layer including the semiconducting material disposed for covering the second conductor in intimate, electrically conducting contact therewith and further having a second surface having a multiplicity of microprotrusions extending therefrom, the first and second surfaces being positioned in normally electrically nonconducting relationship with each other, at least one of the first and second conductor members being resiliently movable in response to a pressing force applied thereagainst so that the multiplicity of microprotrusions extending from the first and second pressure sensitive composition layers are urged against one another to enable electrical conduction between the first and second conductor members, the amount of electrical conduction increasing as the pressing force is increased and decreasing as the amount of pressing force is decreased.