TENONING Fay shown in Fig. 6, is for completing the tenon on large tim bers for car work without reversal; and it will cu t single, double, or triple ten ons on both ends of long timber from one face without turning it end for end. This is done by a machine which presents the stick at right angles to two cutter man drels and to the plane which contains them, but in this ease the saddle containing the cutter-heads has a vertical traverse, and the tenon is vertical instead of horizontal. There are two tables, one before and the other back of the part the cutter saddle, and the stick is first clamped to the one before the cutters; the Lends traverse down, cutting the tenon on one end; then the stick is shifted lengthwise to the table back of the cutters, and the heads traverse up. cutting the tenon on the other end of the stick.
There is an adjustable fence for the thickness of shoulder on the face side of the timber, and suitable gauges determine the length of the tenons. The head and attached moving parts are counterbalanced.
The Rogers Cur-tenoning Araeltine„ to cut double tenons. Fig. 7, is for work up to 16 in. square. There is a table on which the timber is laid, and that holds the timber in place by clamps, which are set by cranks in front. The bed adjusts to and from the double column of the machine by screws at the base, and has a movable sec tion each side of the cutter head for end adjustment of the timber to the cutters.
The cutters are borne on a horizontal axis passing be tween the two columns at the back of the machine, and bolted from the back. The saddle carrying the cutter head, which is counterbal anced, is raised and lowered by a large hand wheel. Hand wheels in front move the timber endwise, so as to bring the proper part of its length in contact with the cutters. lie head is brought clown, cutting as it goes, and passing into a recess in the table ; then the timber is shifted lengthwise, and the head on the upward move ment cuts the opposite end. There is a gauge by which the work may be set. The power stated as necessary to drive the machine is 8-horse, applied by an 8-in, belt.
A tenoning attachment., Fig. 8, for a vertical mortising machine, which works by chisels only, and not by boring, consists of a stock bearing a clamp. between the blades of which two chisels arc held by their ends. their distance apart being regulated by a scale upon the clamp. This tool, used in a mortising machine, will cut tenons from one-eighth to one inch thick, three inches deep, and should prove useful for making window and door-screen frames, and for all light tenoning. The cutters may be adjusted together to form one wide cut ter for cornering and shaping shingles in the same machine.