126 



Popular Science Monthly 



Inserting Hard Fiber Plugs into 

 Automobile Clutches 



THE studs that disengage the dry plate 

 clutch of a certain make of automobile 

 are made of a softer material than the dis- 

 engaging Jevers. This causes the plugs to 



^. ... . CLUTCH LEVER 





j aVWHEU RIM 



itf 



DISK 



A fiber plug to take the place of a worn- 

 out steel stud in an automobile clutch 



wear rapidly, necessitating the replacing of 

 them frequently. 



To avoid the expense of purchasing new 

 studs, we inserted hard fiber plugs to put the 

 stud into proper condition again. These 

 plugs were inserted into tapped holes, and 

 when removing an old one it was merely 

 necessary to drill out the larger portion and 

 then force the balance out by running a tap 

 through the threads. — Adolph Klein. 



A Loose-Leaf File in Which to Keep 

 Photographic Films 



THE filing case is made of a loose-leaf 

 note-book, of a kind having the leaves 

 held at one of the narrow edges, and in 

 which they are as large as the films that 

 are to be preserved. Holes that correspond 

 in size and location with those in the leaves 

 of the note-book should be punched into 

 the margins of the films. The printing 

 quality of the negatives suffers no injury 

 from this operation, as the margins are 

 blank. 



Into the binder are inserted alternately a 

 loose leaf and a film. On the face of each 

 loose leaf may be written a complete record 

 of the following film. By this arrangement 

 each film is separated from the others, and 

 is well protected. By in.serting at the 

 beginning of the book an extra leaf on 

 which an index is kept, and by numbering 

 the leaves, any film may be instantly 

 located. 



Where a large number of films are to be 

 preserved, it will be most practical to file 



them in separate binders, sorting them ac- 

 cording to their descriptions, such as por- 

 traits, landscapes, etc. 



When any film is removed for printing, 

 its accompanying record leaf should also 

 be removed, to prevent the two from be- 

 coming separated. — F. M. Wagner. 



An Automatic Match Safe for ' 

 Holding Box Matches 



AVERY useful match safe can be 

 made from any ordinary M-in. wood. 

 It is convenient because after the cover is 

 taken from a match box it can be slid right 

 into the safe, and also, because it can be hung 

 on the wall as well as set on a table or shelf. 

 The dimensions on the accompanying il- 

 lustrations are for H-in. stock and they 

 should be slightly changed if the wood is of 

 any other thickness. The accompanying 

 illustrations show the construction of the 

 safe as well as the dimensions. 



Two of these / -fM Bevel 



Plans for making a match safe to hold a 

 box of matches and to deliver them a 

 few at a time at the bottom of the box 



If a match scratcher is wanted on the safe, 

 a piece of sandpaper may be glued to the top 

 front piece.^G. Earle McCotter. 



