Mechanics' magazine and register of inventions and improvements . Sub-Marine Boat. grooves are made for a slide to move ; in theslide are two chisels, c, set for making thesmall mortice after boring. This is done bytwo treadles or levers, d, which are movedby the foot, one to press it down, and the otherto raise it up, by means of a cord, e, passingover a pulley, which is attached to the slide,f, containing the chisels. The stuff to bemorticed is kept in its place by the gages,g g, which are fastened by screws, h h. 237. , Fig. 3 represents a wooden frame of tim-ber four inches by five inches
Mechanics' magazine and register of inventions and improvements . Sub-Marine Boat. grooves are made for a slide to move ; in theslide are two chisels, c, set for making thesmall mortice after boring. This is done bytwo treadles or levers, d, which are movedby the foot, one to press it down, and the otherto raise it up, by means of a cord, e, passingover a pulley, which is attached to the slide,f, containing the chisels. The stuff to bemorticed is kept in its place by the gages,g g, which are fastened by screws, h h. 237. , Fig. 3 represents a wooden frame of tim-ber four inches by five inches square, eightfeet long, six feet wide, and three feet high,to the top of the plates, with girts a sufficientheight from the bottom to hang the drum-cranks, &c. on the frame. The followingkind of work is done : the stuff, being planed,is taken to a small circular saw, i, set inmotion on one end of the frame, and cut toan exact length by the aid of a wood slidegage, which can be set to any length, andcan be screwed by set screws or keys. Thenext operation is tenoning: a small frame orgate, k, similar to a common saw gate, isfixed on the side of the large frame : in thetop of the small frame are set two chisels,y, of sufficient length for tenoning small stuff;there are two saws, /, hung in the same gateor frame, for tenoning larger stuflfor doors,&;c. one of which can be used for dove-tail-ing, with proper gages. In the same gate orframe is hung an instrument, called a coper,7n, which is constructed of a fla
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Keywords: ., bookcentury1800, booksubjectindustrialart, booksubjecttechnology
