Spring loaded telescopic tube take-up

A belt take-up including a bearing support tube, a slider tube and a body tube, said bearing support tube interfitting in said slider tube to provide relative longitudinal movement but not rotational movement, said bearing support tube having an end and being telescopically and reciprocally received in said slider tube with said bearing support tube and said slider tube being supported in said body and including means for adjustably biasing the bearing support tube and wherein said means for adjustably biasing said bearing support tube comprises a threaded rod having a free end, means for rotatably supporting the threaded rod in said body tube and for limiting axial movement of said rod, a nut threadably received on said rod and secured to said slider tube and a spring between said nut and said bearing support tube and telescoped over said threaded rod and said spring engaging said bearing support tube end which is spaced from the end of said bearing support tube to provide clearance for adjustment of said threaded rod to afford the bearing tube to float against the spring bias in a recti-linear path during tension on the belt so that rotation of said threaded rod causes movement of said nut and said slider tube to compress or reduce the compression of said spring and thereby vary the compression on said bearing support tube.