314 



Popular Science Monthly 



14, the body of which rests in the 

 loop 10'. The rear end of the wire is 

 l)ent at right angles, as at 17, and has a 

 double bend as at 18, to furnish a crank, 

 and also provide a means to lock the 

 crank after winding up the rubber. 



The next operation is to provide a 

 pair of elevating planes and a rudder. 

 The fore and aft planes are similarly 

 constructed, the forward one 20, being 

 attached to the upper rib 4, and the aft 

 plane to the lower rib 6. Each plane is 

 2 by 4 ins. and at one margin is a pair of 

 slits 22, 22, running into holes which 

 are made to correspond with the vertical 

 loops 10, 10', to which they are attached. 

 The other margin has a single slit 23, 

 with a terminal hole, which is attached 

 to the rib of the frame. These two 

 planes are set at the same angle. 



The cork at the rear end of the frame 

 has a vertical slit 24, set at an angle, and 

 in this a cardboard rudder 25 is placed. 

 The only thing now necessary is to at- 

 tach a cord 26 to the lower rib behind 

 the first balloonette, and wind up the 

 rubber band so as to twist it tightly. 

 The moment the dirigible is free it rises, 

 and moves forwardly, the two fore and 

 aft places keeping it on an even keel, 

 and the rudder at the rear having been 

 set to turn it, the machine flies in a 

 circle, being prevented by the cord 26 

 from flying too high or far away. 



Cover Lift for Cafeteria Platters 



TO keep the food hot for ' 

 self" cafeterias where 



'help your- 

 large and 



heavy covers are used to protect the 

 platters containing food, a chef has 

 devised a means whereby the covers can 

 he lifted to any position and remain in 

 that position indefinitely. His dev-ice 

 consists of two standards and a crossbar, 

 made of pi])e and fittings. The stand- 

 ards are alxjut three feet long and the 

 crossbar is long enough to pass over the 

 platters. 



Within the crosspipe are located small 

 pulleys and holes made for the chain that 

 suspends the cover. The chain runs 

 over the small pulleys directly above the 

 cover and then over another |)ulley 

 fastened in the t'ibow of the pipe, and 

 from there down the pi|}e below the 

 counter where it is fastened to a weight. 



The pulley, chain and weight device lifts 

 the covers out o.'' the way 



The lifting weight is sufficient to counter- 

 balance the weight of the cover, so that 

 the latter will remain in any position it 

 is placed. When a customer arrives it is 

 only necessary to give the cover a lift to 

 present the steaming hot food in the 

 platter. 



The same cov-er lifts may be used for 

 cold dishes or, in fact, for any dishes 

 that are exposed to dust. The weight 

 for lifting the cover is increased or de- 

 creased according to the size of the 

 cover, and oiled joints insure easy 

 motion at all times. — Ch.\rlesF. Smisor. 



Putting New Life in Chisel Handles 



CARPENTERS and mechanics know 

 how soon the butt end of a chisel 

 handle splits when daily exposed to the 

 incessant blows of a mallet or hammer. 

 To overcome this flatten the top of the 

 chisel and attach, with a few small 

 tacks, two disks 

 of leather about 

 }i in. thickness to 

 the flattened top. 

 The leather disks 

 should be the 

 same size as the 

 top of the chisel. 

 If the disks over- 

 lap and expand 

 they c a n b e 

 easily trimmed to 



conform to the _ , 



I , , Two pieces of 



handle top. — leather lengthen the 



H.\RRYA.Sim.i:k. life of the handle 



