Spoke-ten′on-ing ma-chine′.
（Wheelwrighting.) A machine for forming the tenons on the outer ends of spokes. In the illustration, the hub, having the spokes inserted, is placed on a circular iron plate upon the work-bench, and is [2285] held fast by adjustable clutches upon the head-piece a. The whole apparatus is secured to the bench by a screw and nut and lever b. Surrounding the screw is a collar c, and in like manner the bottom plate is surrounded by a collar d. From these collars extend jointed adjustable arms e f, the middle part of each of which is a right and left hand nut corresponding to screws on the ends of the other joints. These arms carry at their ends the brace-guide g, which has vertical adjustment to suit different-sized hubs by means of two screws simultaneously operated by a hand-wheel, and working in the tubes h h, which slide in the tubes i i. In the end of the brace-guide is a hut, which is not threaded on its outer side, and turns freely in the guide unless held by a set-screw; when this is made fast the screw-shaft k feeds in either direction, according as the handwheel l is turned to the right or left. The depth of tenon is gaged by a collar m, adjustable at any point on this shaft. The tenons are formed by a hollow auger held by the brace n, the apparatus being rotated around the fixed hub as a center. That shown in Fig. 5459 is adapted for tenoning cabinet work as well as spokes. The two cutter-heads a b are raised or lowered by means of a screw and hand-wheel to each, and are adjustable to vary the thickness of the tenon or the depth of the shoulder as required, the carriage always remaining stationary. For spoke-tenoning it is provided with a light adjustable attachment on the carriage for grasping the spoke, and a saw for cutting it off to the proper length, at the same time that the tenon is cut.
