Member postings for Tom Larkin

Thanks Michael, just saw your post after I posted the above.

I think I have sorted this. I checked out the patent (google is fantastic) and all details are there. The following is the extract!

651,588. Chucks. BROOKE TOOL MANUFACTURING CO., Ltd., and SHARP, B. July 29, 1948, No. 20204. [Class 83 (iii)] The jaws 19 of a bevel-. closing chuck are slidably mounted in non-circular slots formed in the exterior of a body 10, the outer surfaces of the jaws slidably engaging the inner conical surface of a collar 16 which is formed separ. ately from the body 10 and rigidly secured thereto by means of dowel pins 18, and the jaws are connected to an annular ring 25 which is displaced axially by means of a screw-threaded rotatable sleeve 28 having a locking ring 32 detachably secured thereto, so that when the ring 32 and sleeve 28 are detached, the ring 25 and jaws 19 can be removed without disturbing the relative positions of the collar 16 and body 10. The ring 25 is provided with dovetail grooves or bayonet slots, each engaging a correspondingly-shaped part on a chuck jaw, and the inner end of each chuck jaw engages a flat face 23 on the ring 25. The sleeve 28 may be rotated by hand or by means of a hand-operated key having bevel teeth engaging bevel teeth provided at the lower end of the sleeve. The latter bevel teeth may be formed on a separate annular member detachably secured to the sleeve in which case the locking ring 32 may be formed integrally with the adjacent end of the sleeve. The locking ring 32 may be detachably secured to the chuck body. In a modification, Fig. 5 (not shown), the inner end of each chuck jaw is of part cylindrical shape to have line contact with the ring 25.

Just discovered how to add photos which may clarify the type I have

I recently got a Cardinal mark 2 drill chuck in poor 'visible' condition and I need to dismantle it to clean. Anyone got any experience of doing this. There is a series of small holes around the back of the chuck as well as 2 small slits on opposite sides near the back. All advice appreciated.