Popular Science Monthly 



449 



A Simple Gas-Pressure Regulator 



A STEADY gas pressure is often 

 desirable but seldom obtainable di- 

 rect from the main. The writer, desir- 

 ing to use gas as fuel for six small in- 

 cubators, found the regulator shown in 

 the accompanying diagram very simple 

 to construct and extremely effective. 



The tank used was a five-gallon, gal- 

 vanized iron oil tank. The division 

 shown is cut from a piece of galvanized 

 iron and the pipes are fastened into place 

 with locknuts and leather washers, be- 

 fore it is soldered into place, which 

 should be about one-third the way up the 

 bottom. The center pipe is P/i' stand- 

 ard and extends to the bottom, forming 

 a conductor for the oil and a brace for 

 the dividing diaphragm. The gas pipes 

 are Y/^ standard, and are fastened firmly 

 to the wood brace at the top of the tank. 

 The regulating valve is an ordinary gas 

 cut-off with an extended arm riveted to 



its "T" lever. 



This simple device will 

 regulate an uneven gas 

 pressure from the main 



The arm which connects 

 the valve lever 

 SUPPLY with the float, 

 is bored in a 

 number of 

 places, which 

 allows for set- 

 ting. This ad- 

 j u s t m e n t is 

 necessary only 

 once. The wood 

 float has two 

 V^ holes bored 

 through it as 

 shown, and so 

 uses the two 

 gas pipes as 

 guides. The 

 weight of the 

 float must, of 

 course, be suf- 



cient to operate the valve, which may be 

 suppled up a little with laundry soap. 



_ Pour in enougli thin, cheap machine 

 oil_ to fill the bottom compartment and 

 raise the float al)out an inch, set the 

 valve about two-thirds open and turn on 

 the gas. With no burners going, the 

 float should rise so that the valve is 

 nearly closed. With all burners going 

 it should be an inch above where it 

 stood before the gas was first turned 

 into the regulator. — E. C. Graves. 



An Emergency Drill Press 



DRILL press for emergency jobs 

 can be made in a few minutes pro- 

 vided a breast drill is available. A 



A 



This emergency drill press is simple to rig 

 up, and will be found very useful 



wooden arm between two and three feet 

 in length should be pivoted at one end 

 to a wooden support that is fastened 

 by nails or screws to a stout base. A 

 few inches from the pivot, a bolt should 

 be inserted through the arm and the 

 handle of the drill. Place the lever un- 

 der the leff arm ; manipulate the drill 

 with the hands. — N. S. McEwen. 



A Handy Chuck for a Small Lathe 



A CHEAP and useful chuck for a 

 polishing lathe, can be made as fol- 

 lows : Cut from a IVl''" brass tube, a 

 piece about 1" long. File the edges true 

 and solder at one end a fairly thick disk 

 of brass. In the centre of this, drill a 

 hole and insert and solder a short length 

 of steel shafting, which will serve as a 

 grip for the drill chuck when mounted 



OlvcJi on Ljihe 



A good substitute for a scroll chuck 



on the lathe. At equidistant points 

 around the circumference of the cup, 

 drill and tap to fit three steel screws. 

 The article to be turned is held securely 

 by the screws. — H. Vincent. 



