Investigation of the design of apparatus for the measurement of automatic sprinkler distribution . tion, or the time ofthe test. CHAPTER IV ? In the third design a wooden disc (A )15 in diameter and 1/2 thick v/as supported onIts edge by three legs (B Fig. 5) of 1/4 ironrods spaced so that they rest in the bottomof the pan. A double bearing (C Fig. ^) wasmounted at the center of (A) at the back. Awooden pulley (D Fig. 3) fastened to a smallshaft vcas mounted here and kept so that it wouldnot move horizontally by means of a block and pin(E Fig. 3) This pulley was flanged and wascons
Investigation of the design of apparatus for the measurement of automatic sprinkler distribution . tion, or the time ofthe test. CHAPTER IV ? In the third design a wooden disc (A )15 in diameter and 1/2 thick v/as supported onIts edge by three legs (B Fig. 5) of 1/4 ironrods spaced so that they rest in the bottomof the pan. A double bearing (C Fig. ^) wasmounted at the center of (A) at the back. Awooden pulley (D Fig. 3) fastened to a smallshaft vcas mounted here and kept so that it wouldnot move horizontally by means of a block and pin(E Fig. 3) This pulley was flanged and wasconstructed to give a 11-1/2 circumference in-side the flange. A pointer (F) was fastened tothe rim of the pulley. This was of sufficientlength to give a 4 to 1 ratio in the v/as found necessary to counterbalance thepulley on the side opposite the pointer. Thiswas done by drilling a hole in the face of thepulley and filling it with solder. (K Fig. 3) Tv^o strands of No. 30 enameled copper wire,twisted together for added strength, were passedaround the pulley 1-1/2 turns. A cork float. Fig. ? •? e / /
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Keywords: ., bookcentury1900, bookdecade1920, bookidinvestigatio, bookyear1920
