the stoker can easily raise and lower PHILIPPI’S IMPROVED DRILL CHUCK. Fig. 2 shows the method of holding grooving tools, etc. To the box. effect this a radial mortise is cut through the neck of the The annexed engraving illustrates an improved drill chuck , By this improvement, it is claimed, the… … A is a hollow screw tap and pipe by which communica- D. Then the loose collar, being placed against it, the nut, B, work, It requires no adjustment to center, being so con tion is established between the interior of the barrel and is firmly turned down, clamping the tool securely. structed that the…
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