284 



Popular Science Monthly 



Filter for Lubricating Oil 



THE apparatus to be described was 

 made for the purpose of filtering 

 oil' pumped from the crankcase of a ma- 

 rine gas engine after it had been used 

 in the cylinders and bearings of the 

 engine. The oil filtered out perfectly 



\-Aupporf 

 ^^\''orpaper 



fig. 5 



The oil is poured into the container through the 

 paper filter, and collects in the container to be 

 drawn when needed 



Strap iron was riveted together and three 

 legs riveted on, as shown, with holes for 

 holding down screws bored in the feet. 

 Three angle pieces of sheet iron H H H, 

 were riveted on to the ring G for the bot- 

 tom of the container to rest on. 



Another ring J was riveted together 

 of a size to slip easily into the 

 container. Then a cone was 

 made up of copper wire gauze 

 K and soldered to the bottom 

 of the ring / as shown. Two 

 or three sheet iron clips L L, 

 riveted to / and bent over 

 the outside edge of the con- 

 tainer, served to hold the cone 

 in place. This wire gauze is 

 intended as a support for the 

 filter paper, which is folded up 

 into a cone as shown in Fig. 4 

 and placed inside the wire gauze 

 cone. The oil is then poured 

 into the paper and will slowly 

 filter through and collect in the 

 bottom of the container. It can 

 either be drawn oft' by the valve 

 as needed or be allowed to run 

 through all the time and be col- 

 lected in a can or other recep- 

 tacle. 



It may require some experi- 

 menting to find the best kind of 

 paper to use, but for oil such as 

 "Havoline" or "Monogram" or- 

 dinary brown wrapping paper or 

 even newspaper is perfectly sat- 

 isfactory. Unsized paper is of 

 course preferable, because of its 

 porous character. 



clear and was used over and over with 

 perfect success. 



Referring to the drawings, A is the 

 container, made of zinc with soldered 

 and riveted seams, about 16" high and 

 \A" in diameter. On one end of the 

 cyHnder^/^ was soldered the cone-shaped 

 part D with a %" brass pipe coupling 

 E soldered into the small end. A brass 

 shut-off cock F was screwed into this 

 coupling as shown. A loose-fitting cover 

 was made to fit the open end of the con- 

 tainer. This cover B was about V-/' 

 larger in diameter than the container, 

 and had a handle C riveted on to the top. 



To support this container a ring of 



Fuse for Storage Battery Circuits 



APIECE of glass tul)ing of small 

 diameter is cut into pieces about 

 one inch long. Small holes are drilled 

 in the bottoms of used cartridge shells. 

 The shells should be as nearly the size 

 of the tubes as possible. They are then 

 put on the ends of the tubes and a short 

 length of German silver wire is put 

 through the holes in the shells and 

 soldered. The size of the wire can best 

 be determined by experiment. Two 

 fuses made in this way are fastened to 

 a block of wood by four small clips and 

 the fuse block is done. 



