The Dental cosmos . HE remodeled con-struction shown in theDoriot Handpiece No. 3affords many advantages incase of manipulation, accu-racy of work and durabilityof parts. A union nut attachessheath and frame, entirelyclosing in the bearing be-tween them, reducing thewear in the swiveling of thesheath and affording aneatly designed, well-bal-anced handpiece. It alsoprovides a convenient andquick means of removingand replacing the sheathfor oiling and for attachingangle and mallet attach-ments without removing orchanging sheaths. (Seenext page.) The double-cone chuck (the same as has always been
The Dental cosmos . HE remodeled con-struction shown in theDoriot Handpiece No. 3affords many advantages incase of manipulation, accu-racy of work and durabilityof parts. A union nut attachessheath and frame, entirelyclosing in the bearing be-tween them, reducing thewear in the swiveling of thesheath and affording aneatly designed, well-bal-anced handpiece. It alsoprovides a convenient andquick means of removingand replacing the sheathfor oiling and for attachingangle and mallet attach-ments without removing orchanging sheaths. (Seenext page.) The double-cone chuck (the same as has always beenused in the No. 7 Handpiece with the greatest satisfac-tion) holds securely any straight-shank bit of standardsize. The chuck is operated by a nut at the back end,but by a thrust movement, which is a decided advanceover the old pull. The spindle has taper bearings at both ends—in thenose-piece and in the collet. This provides the means for adjust-ments to efficiently take up lateral or end Decembeb 1907] THE S. S. WHITE DENTAL MFG. CO. 21 The parts forming the bearing between the sheath and the frame arenow steel, which greatly reduces the possibility of wear at this point. Two features of the wrist-joint will commend themselves to thediscriminating dentist: The first of these is a modification whereby the open of the jointis greatly increased, affording a wider range of movement. (Fig. i.) The second, known as the Extension-Arm Stop-Attachment, bylimiting the swiveling of the wrist-joint and of the Handpiece on thewrist-joint (Fig. 2), permits all the freedom of movement requiredwhile absolutely preventing winding of the belt around the fore-arm. The general construction facilitates cleaning and making repairswhen needed. Take it all in all, we know of no dental appliancemore likely to give entire satisfaction than the No. 3 Doriot Handpiece. Price, Doriot Handpiece No. 3, Complete Attachments for Doriot HandpieceNo. 3
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