The machinist and tool maker's instructor, containing an easy method of calculating and laying out difficult work in the machine shop .. (1896)
Genung, Edward. [from old catalog] · New York [Press of J. B. Savage, Cleveland] · leaf 212
suspended atthe end of the lever. The valve is 3.5 diameter, then 3.5X3.5=12.25X.7854=9.62, the area in square inches of the valve; then, 9.62X2.75,the distance from the fulcrum, =26.45, and multiplied by thepressure, 65 pounds, =1719.25; this divided by the lengthof lever 35=49.1 pounds, as the… … We have a safety valve (Fig. 5); the fulcrum A is 3 inchesfrom the valve B, the weight C is 65 pounds, and the weightof the lever D is 10 pounds and its center of gravity (of thelever) is 9 inches from the fulcrum A; the valve is 3^ inchesdiameter at the point of pressure, and we wish it to lift…
Machinery
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
![An illustration from The Telegrapher [microform] (1864)](https://img.insideoutlibrary.com/img/200/ia-telegrapher04nati-368-172.webp)
