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Page:Popular Science Monthly Volume 90.djvu/317

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Popular Science Monthly


��Making an Ejector of Pipe and Fittings AN ejector is a difficult device to make £\ and get the right proportions for de- livering water at different temperatures. One made with dimensions given will lift


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��Pipe connections to form an ejector for water of different temperatures

hot water. The suction and delivery pipes are 2 in., turned into a tee as shown, the other opening being fitted with a reducing bushing to admit a ^4 or i-in. pipe for steam. This pipe should be drawn to make a hole at the inner end not over 3^ in. in diameter. The end of this pipe should have a long thread cut on it for adjustment and a lock nut fitted to hold it in place when set.

��A Sharpening Block for Putting Keen Edges on Tools

CHISELS and plane-irons generally have a wire edge after being sharp- ened on a stone. This is best removed by rubbing on leather. Glue an old piece of leather belt on a small block and it will answer the purpose admirably.

��How to Drill Holes in Glass with a File Point

HOLES may be drilled in glass in the following manner. Take a pointed, three cornered file and dip it in pure tur- pentine. Put the point of the file at the place where the hole is to be drilled and twist the file first in one direction and then in the opposite direction, bearing lightly upon the file. Slightly turn the handle of the file around in the hand and twist it some more. When no glass is cut add more turpentine. After the hole is drilled through it can be smoothed with emery cloth.

Holes may also be put in' very thin glass. Take a rod the diameter of which is the same as the diameter of the hole to be made, and place the end at the point

��where the hole is wanted. Pack wet clay around the rod, and then withdraw it. Pour melted solder into the hole left by the rod. As soon as the solder is poured in, dip it into cold water and knock out the piece of glass. — Lester Reinicke.

��A Tool Post Chip Guard for a Lathe

IN CUTTING some kinds of metal the chips will fly from the tool edge and are apt to strike the eye or burn the flesh. The il- lustration shows a guard that is easi- ly fitted in the tool post of a lathe, where it will guard the face. It consists of a square of metal with a projecting tang the si2e of

the tool-post slot, the square opening being covered with a piece of celluloid.

�� � � ��The face guard b lo- cated in the tool post

��Small Auxiliary Oven for a Gas Range

WHERE cooking requirements are small the cost of heating a large oven on a gas range of the type shown may seem excessive, whereas a small portable oven set over one of the burners uses little gas. To overcome the incon- venience of storing it when not in use and of lifting it frequently, a metal shelf raised on flat iron brackets at a sufficient


���Extra burner attachment for a gas range

��height so as not to interfere with the free use of all the burners, may

be erected over the stove. An additional burner should be fitted into the bottom of the oven and connected to the gas supply. The shelf extending out on the side of the oven forms a convenient warming place for plates. — A. B. Kexnedy.

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