Popular Science Monthly 



A Substitute for a Painter's 

 Striping Brush 



THE amateur who wishes to do a little 

 striping but does not possess the 

 requisite skill in using a striping-brush, can 



c 



® 



A pen like the draftsman's ruling pen made 

 from wood strips for striping with oil paint 



provide himself with an efficient substitute 

 which consists of three strips of hard, close- 

 grained wood, about 3^ in. thick and ^ in. 

 wide. Two of these strips should be about 

 8 in. long, the other about 5 in. long. The 

 short piece is nailed between the others 

 in the manner shown in the illustration, 

 forming practically one piece with a slot 

 in the end. This end should be shaped to 

 a point. 



About 2 in. from the end of the slot, drill 

 a ^-in. hole and insert a stove-bolt. This 

 bolt is used to adjust the space between the 

 points or nibs. To any one familiar with 

 an ordinary ruling pen it is obvious that 

 this is simply the same thing on a larger 

 scale and is operated in the same way. 

 Care should be taken that the paint used is 

 not too thin, as it is liable to spread. A 

 little practice is advisable before making 

 a stripe which is to remain on the piece 

 to be finished. — Frank L. Matter. 



Starting Automobile with Current 

 Taken from Another Car 



AFTER the engine on a Ford car has 

 , been overhauled it is usually pretty 

 stiff and hard to crank fast enough to start 

 on the magneto. The engine may be 

 started by the current from another similar 



AUTO TO BE STARTED AUTO FURNISHING CURRENT 



.... PRIMARY TER. . . « . 



• • • • 5EC0NDARY TER • . • • 

 BATTERY^ .IT- MAGNElo BATTERY>« _r<:MAGNETO 

 TER. XA^l^ TER. -^.^SN^TER 



. , ^^{To^ ^yoSmE^ w^ 



ON ENGINE ^ ■^'''V'l"'^ Q ^ ^j..., 



^WIRE CONNECTING MAGNETO 

 BATTERY SIDE OF COIL BOX 



Wiring diagram to connect magneto of 

 one car with another for starting engine 



car, as shown in the illustration, by the use 

 of two small wires and by turning the switch 

 key of the overhauled engine to the battery 



779 



side. Of course, after the engine starts the 

 key is turned to the magneto side and it 

 furnishes its own current. 



This method can be used to locate trouble 

 in the magneto also; for, if the engine runs 

 all right when connected with the current 

 from the other magneto, its own magneto 

 must be faulty. — L. E. Nofsinger. 



Making Small Gears for 

 Emergency Use 



IN the making of models it is sometimes 

 necessary to use a drive for speed that 

 cannot be obtained with stock gears. Where 

 there is no gear cutter at hand, or the cost 

 for making them is too much, the simple 

 makeshift illustrated will easily supply the 

 experimenter's wants, and the cost is prac- 

 tically nothing. They are made from sheet 

 metal, the teeth being formed by punching 

 or drilling holes in a circle drawn on the 

 surface. These holes should be evenly 



METHOD OF PUNCHING HOLES 



Punched disks to form teeth and holes for 

 making gears to rim models or a cord drive 



spaced, then after punching or drilling, the 

 outside should be cut away on the circle 

 drawn. This leaves half of the portion of 

 the metal between the holes extending like 

 teeth. The wheel into which these teeth 

 mesh is made in the same manner, but 

 instead of cutting away the outside it is 

 left intact, as the teeth of the other wheel 

 will enter the holes and drive it. 



The device used for making the holes by 

 punching is shown in the illustration. It is 

 made of heavy sheet metal bent in a closed 

 U-shape, the ends being drilled to make 

 holes for admitting a punch. These holes 

 will guide the punch when making the 

 holes in the disk. The disk is placed be- 

 tween the ends of the metal. 



An excellent drive for a cord may be 

 made in this way. — Robert C. Knox. 



