Potentiometer

Claim 1

A SEALED SUBMINIATURE POTENTIOMETER COMPRISING: A HOUSING HAVING ENCLOSNG WALLS DEFINING A SUBSTANTIALLY CYLINDRICAL INTERNAL CAVITY, A RESISTANCE ELEMENT POSITIONED ABOUT THE PERIPHERY OF SAID CAVITY, A PAIR OF FIXED ELECTRICAL CONNECTIONS TO SAID RESISTANCE ELEMENT, AND EXTENDING THROUGH SAID HOUSING, AN ELECTRICALLY CONDUCTIVE SLIP-RING ELEMENT EXTENDING EXTERNALLY OF SAID HOUSING, AND DEFINING A SUBSTANTIALLY ANNULAR BEARING SURFACE INTERNALLY OF SAID HOUSING DISPOSED COAXIALLY THEREWITH AT THE CENTER THEREOF, A ROTOR POSITIONED SUBSTANTIALLY AT THE CENTER OF SAID HOUSING AND UPON SAID BEARING SURFACE, A CONDUCTIVE ROTOR CASING DISPOSED OVER A PORTION OF SAID ROTOR, INCLUDING THAT PORTION POSITIONED UPON SAID BEARING SURFACE, A WIPER ARM AFFIXED TO SAID ROTOR CASING AND HAVING SLIDABLE ENGAGEMENT WITH SAID RESISTANCE ELEMENT, THEREBY ELECTRICALLY INTERCONNECTING SAID ELECTRICALLY CONDUCTIVE ELEMENT TO A MOVABLE POINT ON SAID RESISTANCE ELEMENT INTERMEDIATE SAID PAIR OF FIXED ELECTRICAL CONDUCTIONS, SAID ELECTRICALLY CONDUCTIVE ELEMENT AND SAID ELECTRICAL CONNECTIONS EXTENDAND FORMING THEREWITH SUBSTANTIALLY SEALED PORTIONS OF SAID ENCLOSING WALLS, A ROTOR POSITION CONTROL CONNECTED TO SAID ROTOR, AND ROTATION FREEDOM PROVIDING SEALING MEANS DISPOSED BETWEEN SAID ROTOR AND SAID HOUSING FORMING THEREWITH A SUBSTANTIALLY SEALED PORTION OF SAID ENCLOSING WALLS.