Q AmatGur ■ 

 Electrician 



^d Wii-eless Operator 



A Clip for Removing Insulation 

 from Wires Quickly 



IN thf- accompanying sketch is shown 

 a handy device for making the opera- 

 tion of removing the cotton or other 

 insulation from electrical conductors easy 

 and efficient. The 

 clip is very simple 

 to make as it mere- 

 ly consists of a 

 piece of steel 1/16 

 in. thick and '^/i 

 in. wide, bent into 

 the required shape, 

 as shown, then ground and tempered at 

 the cutting edge. Triangular notches are 

 ground or filed in the cutting edge before 

 tempering, make the operation of pulling 

 the insulating material from the wire 

 easier. As a protection to the hand, it is 

 ad\isable to cement or rivet a piece of 

 leather to the strip. — Peter J. M. 

 Clute. 



The sharp edge re- 

 mo ves insulation 

 quickly and evenly 



A Depth Indicator for a House 

 Water Tank 



THIS depth indicator was built to 

 automatically gage the depth of 

 water in a small house tank and was built 

 entirely of odds and ends of the kind found 

 about any work bench or household. 



A drum was made of a cylindrical piece 

 of wood 2 in. in diameter furnished with 

 two rims of cigar-box wood 23-2 i^i- i^i 

 diameter. The top rim was then cut 

 down to the diameter of 2 in. except at 

 one point where a tooth was left project- 

 ing out 3<4 in. and about the same width, 

 as shown at A. 



A second disk 2^^ in. in diameter was 

 then cut from cigar-box wood and its cir- 

 cumference serrated with 13 teeth similar 

 in size to that on A, and the space between 



them sufficiently wide to fit well over it. 



The drum was then drilled through the 

 center and mounted as shown on a solid 

 base so to revolve easily about the screw 

 in the center. The toothed disk was then 

 glued to a length of a large spool to bring 

 it in line with the tooth on A and 

 mounted on a pivot so the teeth would 

 engage readily without binding. The 

 tooth disk was pivoted in the center of 

 the base. 



A card-board disk was then glued over 

 the toothed disk, their centers being 

 placed concentrically. This card-board 

 disk was then pointed off with 13 equi- 

 distant marks, each mark lying directly 

 over a tooth of the gear underneath. 

 They were then numbered from to 12, 



Dnun and float with an indicating wheel to 



show the water level within a small tank 



the tank being 12 ft. in depth. A metal 

 pointer was fastened to the top of the 

 base so it pointed down and over the card- 

 board dial as far as the numbers. 



787 



