GB464875A - A chuck for toothed or serrated members - Google Patents

Abstract

464,875. Chucks. WAKEFIELD, J. Dec. 18, 1935, No. 35090. [Class 83 (iii)] In a chuck for gripping toothed or serrated work-pieces such as gear wheels, two concentric members are relatively rotatable and carry toothed parts engageable between the teeth of the work so that the relative rotation of the members will cause opposing balanced forces to grip and centre the work. ' In one form, for gripping internally toothed gears, concentric sleeves A, A<1>, Figs. 1 and 2, carry toothed segments B, B<1> respectively which engage between the teeth of the work C, the sleeve A<1> being secured to the chuck body A<2> by screws A<3> and the sleeve A being rotatable by means of an arm D<1> thereon and a tangential screw D<5> in the body. A tangential spring D<3> acting through a plunger D<2> on the arm tends to rotate the sleeve A to the released position. In another form, for gripping an externally toothed gear G<5>, Fig. 3, the outer sleeve F<1> has toothed segments F<5> between which project toothed segments F<3> on the inner sleeve which is fixed to the body G3 by screws F<4>. The sleeve F<1> is rotated for gripping the work by the screw H<5> against the action of the spring H' and the front of the chuck is completely closed by a cover plate secured by screws G'. Each tooth of the segments F<3>, F<5> has a central gap H to assist in centring the work, and any teeth which would extend from one segment to the adjacent one are omitted. In another modification, each sleeve carries a complete ring of teeth, the two rings lying adjacent each other, one being fixed to the body and the other rotatable by means of a screw anchored to a swivel on the body and screwing in a lug projecting from the sleeve. In each form a surface machined accurately perpendicular to the chuck axis is provided for engagement by the inner end of the work.