Investigation of the design of apparatus for the measurement of automatic sprinkler distribution . ther the maximum or minimumreadinfc. CHAPTER III. The primary idea in the second design t?asto make an instrument working on the sameprinciple as the first one with sufficient changesto eliminate the undesirable features. The base of this instrument was made so thatit v;ould set on the bottom of the pan. Thisnecessitated that the length of the upright member(A Fig. 2) be increased 12. The arc (B Fig. 2)on which the reading would be obtained was made ofNo. 20 galvanized iron with paper fastened on
Investigation of the design of apparatus for the measurement of automatic sprinkler distribution . ther the maximum or minimumreadinfc. CHAPTER III. The primary idea in the second design t?asto make an instrument working on the sameprinciple as the first one with sufficient changesto eliminate the undesirable features. The base of this instrument was made so thatit v;ould set on the bottom of the pan. Thisnecessitated that the length of the upright member(A Fig. 2) be increased 12. The arc (B Fig. 2)on which the reading would be obtained was made ofNo. 20 galvanized iron with paper fastened on eachside to allow marking. The indicator (C Fig. 2)or pointer was made of much heavier materia]. Theindicating end was cut in such a way that readingscould be obtained on both sides of the arc. Thefloat and wire connection were the ones used inthe first design. In making the first tests it was observedthat In placing the instrument in the water, thewater was distrubed to such an extent that it wasimpossible to obtain an instantaneous that reason the base was redesigned in the form. Wiff, IT of a wheel. (D i^ig. 2) With this arrangementthere was a mlnlmurr amount of disturbance. It was novi necessary to design some attach-ment v/hereby depths greater than 5-1/2 of watercould be measured. A design for a telescopingbase first worked out and tried. This proveda failure, due to the fact that it slowed up theprocess to a marked extent ^^nd that it made theinstrument very awkward to handle. The followingarrangement, however, was v^orked out, tried, andproved a success. The wooden upright was re-moved from the hub, the hub was tapped and a pieceof 1/4 pipe (E Fig. 2) 8 long was screwed into inches v;as cut off the bottom of the upright,the end was bored to a depth of 2 to take a pieceof Bessemer steel rod (F ) 1/4 in piece of 1/4 Bessemer steel rod 9 long wastaken and two small holes bored through it 5 apart,the first one being 2-1/2 from one
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Keywords: ., bookcentury1900, bookdecade1920, bookidinvestigatio, bookyear1920
