GB609175A - Device for truing-up cycle wheels - Google Patents

Abstract

609,175. Testing balance of wheels; indicating-apparatus. ANDERSEN, V. M. March 8, 1946, No. 7253. Convention date, Oct. 15, 1941. [Classes 106 (ii) and 106 (iv)] In apparatus for testing the rim 39 of a spoked wheel for true rotation about its axle 38 the latter is clamped in a forked frame 2 mounted on a stand 1, and indicating-apparatus is provided comprising a single roller feeler 28 bearing on the rim and actuating two indicators, one 32 for showing radial deviations and the other 34 for showing lateral deviations. An extension 15 of the frame has a horizontal arm 19 thereon vertically adjustable by screw means 17, 18, and an indicator housing 23 is carried on a sleeve horizontally adjustable on the arm 19 by screw means 21, 22. An arm 27 (not shown) pivoted by a universal joint to the housing 23 carries the feeler 28 which rests on the rim 39 ; an enlarged annular extension of the feeler is pressed by a spring- against the side edge of the rim. One arm of a bell-crank lever 29 rests on the arm 27, the other arm being connected by a link 30 to a pointer 32 pivoted at 31, and horizontal movements of the arm 27 are transmitted through a pivoted lever 33 to a pointer 34. Springs may hold the levers 29, 33 against the arm 27. When the rim runs true there is no movement of the pointers and discs near the end of each are superimposed. A cam disc 36 operated by a handle 35 can be turned to move either or both levers 29, 33 away from the arm 27. A third pointer 41 movable over a scale 40 is moved by the screw means 21, 22 to give an indication of the width of the rim 39. The wheel is centralized before clamping by a pair of pivoted and interconnected arms 11, 12 which can be swung together so that their ends both engage the wheel hub. The cycle wheel is held by clamps 7 to pins 5.