Popular Science Monthly 



307 



Convenient Check Protector 



THIS dc\ice is valuable to persons 

 who are recjuired to write diceks 

 where a check-writing or j)rotecting 

 machine is out of the (luestion. The 

 principal advantage of this device is its 

 compactness, inasmuch as it can take 

 the place of the ordinary pen clip, 

 thereby serving two purposes and always 

 being at hand when required. 



It consists of a piece of spring sheet- 

 brass, "^8 in. wide and 4 ins. long, bent to 

 the shape of a long 11 (as shown in the 

 illustration). A set of teeth (made out of 

 brass or steel) is soldered on to the ends 

 of the U-shaped spring (as shown in 

 Fig. II), but the greatest care must be 

 taken to insure the perfect meshing of 



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A check protector, a pen for writing the 



check, and a clip for holding the pen, all 



combined in one instrument 



one set with the other; else the device 

 will not work efficiently. The teeth 

 should crimp and slightly i)erforate the 

 paper. A drop of solder placed on the 

 free end of the spring (as shown at A 

 in Fig. II) enables one to slip it o\'cr 

 the edge of the pocket and prevents the 

 pen from falling out. 



After filling out the check, place it 

 between the jaws of the protector, with 

 a portion of the lettering to be pro- 

 tected between the teeth. Exert a sliglit 

 pressure with the thumb and then allow 

 the spring to open. Slide the device 

 along to another portion and keep re- 

 peating this operation until the whole 

 amount to be protected is co\crcd, thus 

 making it impossible for anyone to 

 tamper with the check without being 

 detected. 



Attachment for Oxy -Acetylene Torch 



THIS attachment is for a welder in 

 filling low spots and holes in cylin- 

 ders where it is impossible to get in with 



The low spots and holes in cylin- 

 ders, so hard to reach in welding, 

 can be filled easily, if the torch 

 has an attachment such as the 

 one here illustrated 



the torch. It is made of >^-in. heavy 

 copper tubing. Obtain a tip of the size 

 desired for the job and cut in half at the 

 hexagon part. Then braze the tubing 

 to the bushing part of the tip. Also 

 braze the other end of the tubing to the 

 other part of the tip. Anneal the tubing 

 so that it will bend to suit the particular 

 task in hand. This will work on all sizes 

 of lips. — H. P. Allmaras. 



Turning on Lathe with Calipers 



TO use calipers when turning small 

 or medium-sized work set them at 

 the size of the piece to be turned down, 

 and then alter going over it roughly 

 take a small, flat chisel in one hand. 

 Hold the chisel over the rest against the 

 wood and the cal- 

 ipers in the other 

 hand over the re- 

 \'ol\ing wood so 

 as to size it by 

 holding one side 

 of the cal i pers 

 against the chi.sel, 

 sliding it backand 

 forth on the chi.sel 

 to allow the shav- 

 ings to work off. 



This is a slow way, but a safe and sure 

 one for accurate work. — \V. F. GooT. 



Calipers give accuracy 

 in turning small pieces 



Starting Your Automobile with Ether 



TO start an obstinate automobile 

 engine, purchase some ether in a 

 paint store and prime your engine with 

 it. Turn the engine o\-er once or twice 

 with the spark-switch off and then throw 

 on your spark. With a half turn of the 

 crank the motor will start. 



