Apparatus for sensing axial and tangential forces exerted on a spool of datalink filament (USH0000550)
Original Publication Date: 1988-Dec-06
Included in the Prior Art Database: 2008-Apr-28
US Statutory Invention Registration (SIRs)
Related DocumentsPatent/Patent Application:
Apparatus for sensing and measuring axial force and torsional force exerted n a spool of fiber optic datalink filament as the filament is drawn off the spool at rates of speeds comparable to that experienced in the flight of a missile. The apparatus includes support means for supporting the spool, which includes an elongated shaft mounted on a plurality of elongated supporting members. Each of the supporting members has a first flex portion of reduced thickness which permits the support member to flex along the longitudinal axis of the support shaft and a second flex portion of reduced thickness which permits the support member to flex transversely of the longitudinal axis of the support shaft. Strain sensor bridges are used to convert the flexing of the flexed portions into electrical signals which are accumulated in a microprocessor and converted to signals to indicate the axial and torsional forces exerted on the spool during the pay out of the filament from the spool. The testing apparatus includes means for withdrawing filament from the spool at rates comparable to that experienced during the flight of a missile.