164,184. Strong, A. L. March 24, 1920. Sockets.-In a disengaging drive drill-chuck the tang 28 of the drill is driven by removable pins 12 in a cylindrical socket member 10 having an adjustable abutment screw 29. An internally tapered sliding sleeve 15, driven from the socket member by a pin 17 engages the shank of the drill and is normally pressed outwardly against the inturned flanga of a, loose retaining sleeve 21 by a spring 19. When the retaining sleeve is gripped by hand, cams 25 coact with cam surfaces 24 on the sliding sleeve 15 to move the latter upwards and so disengage the drill.
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