618 



top of a bolt fastened in a vise as shown in 

 Fig. 6. Insert a short piece of pipe over the 

 free end of the rivet and tap the top of the 

 pipe with a hammer to draw the rivet head 

 and lining tightly in place. See that the 

 end of the rivet extends about 3/16 in. 

 through the band. Then rivet over the 

 heads with light, sharp blows of a hammer. 

 The method of doing this for the external 

 brake is shown in Fig. 6 and for the in- 

 ternal type in Fig. 7. Care should be taken 

 in marking off the lining holes or, in case of 

 the external brake, the lining may tend to 

 cut corners as shown in Fig. 8. This may 

 be avoided by leaving the holding-in bolts 

 in place in lining and band until the other 

 holes are filled with rivets. 



Popular Science Monthly 



A Cord Cutter Made From a Safety 

 Razor Blade 



THIS cord cutter consists of a discarded 

 safety razor blade and a block of wood. 

 If the cutter is to be used on the counter 

 edge the block of wood should be consider- 

 ably thicker 

 than the coun- 

 ter top. The 

 lower edge of 

 the block is 

 placed flush 

 with the under- 

 side of the coun- 

 ter allowing the 

 extra thickness 

 to project above the upper surface, which is 

 notched in the center and cut slanting 

 toward both ends. It is then fastened with 

 two wood screws run through the holes in 

 the razor blade. This manner of fastening 

 allows a small portion of the blade to 

 extend in the notch where the cord will 

 strike it upon being drawn in the open- 

 ing. — Thomas Dean. 



-Screws pass tnrougn 

 block and razor blade 

 Discarded razor blade 

 used as a cord cutter 



Electric Lamp Attached to a Spoon 

 for Tongue Depressor 



WHEN it becomes necessary to examine 

 the throat of a child, or to remove 

 a lodged fishbone or button, a spoon is the 

 first thing sought for to depress the tongue 

 in order to make the examination. A good 

 light is also necessary. To furnish one for 

 the purpose, a small electric light may be 

 attached to the back of the spoon. 



This lighted spoon is not difficult to 

 arrange. It requires only an ordinary 

 spoon, a small two-volt lamp, a dry cell, 

 a few inches of enameled wire — about 



18 gage — one insulated and one uninsulated 

 binding post and 3 or 4 ft. of flexible cord. 

 Scrape enough enamel from the ends 

 of the wire to allow for soldering to the 

 lamp and attaching to the binding post. 

 Attach the posts on the end of the spoon 

 handle. Solder the base of the lamp to the 



A small electric globe fastened to an ordi- 

 nary table spoon for examining the throat 



spoon bowl and the end of the enameled 

 wire to the center button of the lamp. 

 Connect wire attached to the center button 

 on lamp to the insulated binding post. 

 Enamel the base or back part of the lamp 

 so that the light wHl be reflected into the 

 throat and not into the operator's eyes. 

 Attach the flexible cord to a battery and 

 to the binding posts, and the spoon is 

 ready for use. 



If carefully made, this will prove to be 

 an invaluable addition to the "first aid" 

 equipment of the medicine cabinet. The 

 spoon with the attachment can be sterilized 

 in hot water. — E. A. Warner. 



Temporary Repair on a Broken 

 Lubricator Filling Glass 



A STEAM shovel located at a great 

 distance from a repair shop had a 

 broken lubricator filling glass. There were 

 no extra ones on hand. 

 The sketch illustrates 

 how a small piece of 

 wood was whittled and 

 substituted for the 

 glass. Though this did 

 not register the use and 

 supply of oil in the 

 lubricator, it plugged 

 the openings left by the 

 broken glass satisfac- 

 torily and held very 

 nicely until new glasses 

 arrived several days 

 later. The wood should 

 be cut as round as the glass to make a close 

 joint at each end in the fittings. The nuts 

 should be made secure. — F. W. Bentley. 



KWood 

 piece 



A wood plug sub- 

 stitute for glass 



