g4 TRANSACTIONS OF THE 



JVo. 1032. — Dovetailing Machine. 

 Burley & Putnam, Eoston, Mass. Superior. This macMne is 

 composed on one side of a niunber of circular saws placed on the 

 same arbor, and kept at regular distances by broad rings or 

 washers. One set of saws being on the right and another on the 

 left. Both sets increase in size uniformly towards the middle, the 

 edges forming a straight line. Before these saws is placed, a car- 

 na<re having a ledge in front, against which rests the board in 

 whtch the dovetail mortises are to be made. This board takes a 

 definite position by means of stops on the carriage, and the car- 

 riage itself is arrested in its forwai-d motion by stops on the sides. 

 The board being placed in the carriage against the ledge in front 

 and the stop at the side, it is pushed forward; at one operation 

 all the mortises are furnished on one side. Then the same process 

 on the left finishes all the mortises entirely by the circular saws. 

 On the opposite side of the machine is a table sloping in each 

 direction like the roof of a house. The board in which the dove- 

 tails are to be formed being placed on one slope against a pair 

 of guides in front, a set of dovetail chisels are brought down ver- 

 tically, cutting one side of the set of dovetails. The same opera- 

 tion on the other slope completes the dovetails, and the two pieces 

 of wood thus prepared by this machine are ready for gluing. If 

 the dovetails are to be hid, as in the front of a drawer, a circular 

 saw at the side of the machine cuts the groove, and the chisels are 

 set to stop at this groove. [^ ^H^^r medal awarded. 



JVo. 1192. — Match Cutting and Framing Machine. 

 Southwick, Thomas & Co., Brooklyn, N. Y. Excellent. This is 

 a most ingenious contrivance to save time and labor m the manu- 

 facture of articles that individually have less commercial value 

 than any thing else that has a market price. But from the im- 

 mense number consumed, this small machine is entitled to work 

 with those of more imposing character, where some larger opera- 

 tion is to be performed, but seldom and in the aggregate having 

 no greater value. It deserves description. 



A wheel of about 30 inches diameter is placed in front of and 

 at right angles to the frame, in the same manner as the circular 

 cutting knives in front of a farmers straw bench. 



On the top of this wheel is screwed a frame of cast iron, having 

 ratchet teeth on the outside that are held by a spring fall, so that 

 at each tui-n of a crank this frame and the wheel advances one 

 tooth . 



