Accession Number : ADD015851

Title :   Friction Drive Position Transducer.

Descriptive Note : Patent, filed 28 Oct 91, patented 22 Jun 93,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Waclawik, Ronald E ; Cayer, James L ; Lapointe, Kenneth M

Report Date : 22 Jun 1993

Pagination or Media Count : 8

Abstract : A spring force loaded contact wheel mounted in a stationary position relative to a reciprocating shaft is disclosed. The apparatus of the present invention includes a tensioning assembly for maintaining absolute contact between the contact wheel and the reciprocating shaft wherein the tensioning assembly urges the contact wheel against the shaft to maintain contact there between so that the wheel turn as the shaft is linearly displaced. A rotary encoding device is coupled to the wheel for translating the angular and rotational movement thereof into an electronic signal for providing linear displacement information and derivative data with respect to displacement of the shaft. Absolute friction contact and cooperative interaction between the shaft and the contact wheel is further enhanced in the preferred embodiment by advantageously selecting the type of surface finish and the amount of surface area of the contact wheel relative to the surface condition of the shaft as well as by reducing the moment of inertia of the contact wheel.

Descriptors :   *DRIVE SHAFTS, *PATENTS, ASSEMBLY, CODING, DISPLACEMENT, ELECTRONICS, FINISHES, FRICTION, INERTIA, INTERACTIONS, INVENTIONS, MOMENT OF INERTIA, MOMENTS, SIGNALS, STATIONARY, SURFACE PROPERTIES, SURFACES, WHEELS, PNEUMATIC EQUIPMENT

Subject Categories : Electrical and Electronic Equipment
      Machinery and Tools

Distribution Statement : APPROVED FOR PUBLIC RELEASE