Popular Science Monthly 



631 



Cutting Brass Tubing Rapidly 

 on a Buzz Saw 



BRASS tubing can be cut off to the 

 required lengths very much faster on a 

 buzz saw than by any other method. A 

 square cut is obtained in this way and by 

 cutting with a set stop, lengths are made 

 exact within a few thousandths of- an inch. 

 As compared with cutting off in a lathe or 

 milling machine or by hand the buzz saw 



A Labor Saving Wood Lift Built In Like 

 a Dumb-Waiter 



A PROPERLY built wood lift is a labor- 

 saving device and may be made in- 

 conspicuous by concealing it by means of a 

 paneled door in the wall, as in the illus- 

 tration. An open-faced box or cage is 

 built and placed in two main braces, to 

 which the pulleys are fastened, serving as 

 guides. It runs between two heavy up- 



II 



r 



BACK OF LIFT 

 FIXED ROPE. 



t|l- 



^ft^^^^r 



PULLEY BLOCK 

 H 22" — 



84"- 



PULLEY SY5TEM 



Parts, guide rails, location of ropes and counterweight for the construction of a wood lift to be 



built 

 will show 



a house for the 



of labor. 

 Sheet 



saving 



multiplied production 

 brass can be cut in the same way in thick- 

 nesses up to l /i in. The metal heats in the 

 thicker pieces, and gloves must be worn. 

 A circular saw — not an ordinary wood- 

 cutting saw — is used for cutting metal. 

 These saws have a different temper from 

 wood saws, have finer and different shaped 

 teeth and have very little set. The tubes 

 are held and the work is done just as if they 

 were wood pieces. 



It is concealed by a panel in the wall 



rights equipped with guide-rails. A third 

 upright makes a "well" for ropes and a 

 counterweight. Two lengths of 3/16-in. 

 rope, A and B, with ends fixed in an over- 

 head pulley-block, run to cage pulleys and 

 back to sheaves fixed in the overhead block, 

 and thence to the winch, as shown. A third 

 length C connects the car with the counter- 

 weight. 



A lift built to an upper floor, with doors 

 in the first and second floor walls, is almost 



