Dental handpieces

Claim 1

In a handpiece for a dental drill having a tubular wall and an operative end adapted to receive a drill tip, a plurality of internal service lines extending through said handpiece, that improvement comprising a fibre optic light conductor passing along inside the tubular wall of the handpiece and emerging through the wall thereof adjacent said operative end, the said conductor terminating adjacent the operative end of the handpiece, a second flexible fibre optic light conductor arranged as a continuation of the said first mentioned light conductor at the end remote from said operative end for illuminating a drill tip when such is fitted in the operative end of the handpiece, a composite connection for connecting said internal service lines to external service lines and said second fibre optic conductor to the first fibre optic conductor including a socket inserted in the end of the handpiece remote from the operative end, said socket having a base through which project ends of the internal service lines and the said first mentioned fibre optic light conductor from within the handpiece, and a plug member received in the socket and having recesses for receiving the said external service lines and flexible light conductor whereby the external lines and conductor and internal lines and conductor may be connected together.