An Improved Self-centering Chuck as Applied to the Face Plates of Machines for Building and Trueing Bicycle Wheels.

摘要

28,324. Hopper, F., and Wilson, H. Dec. 27. Chucks.-Relates to a self-centering chuck applied to the faceplates of machines for trueing bicycle wheels and giving equal tension to their spokes. The faceplate a is furnished with radial slots c and a ring d with tangential slots e so that their intersection forms a series of holes, simultaneously adjustable, through which bolts f are passed to connect the ring d to a series of radially-guided jaws g. By rotation of the ring d, by means of a crank i on the .shaft of a worm j gearing with a rack k, the jaws are expanded or contracted to grip and true the wheel, the axle of which is retained in a sleeve o.