Mechanical laboratory methods; a testing of instruments and machines in the mechanical engineering laboratory and in practice (1918)
Smallwood, Julian Chase · New York, D. Van Nostrand company · leaf 82
ould not be greater than 0.01 in. for each foot ofcord, the cord being of good quahty. If the overtravel exceedsthis, the spring should be tightened, until it is reduced to thenamed amount. The spring should not be any tighter than necessary, as thiswould increase the reaction on the drum spindle… … Tmrnnntmn mruimmmFig. 38.—Smallwoods Drum Motion Tester. this purpose. A shaft S, the rotary speed of which may be con-trolled by a variable speed motor, actuates two similarly pro-portioned crank trains E and C, set exactly 90 degrees apart.The motions of the two cross-heads are thus exactly…
Mechanical engineering laboratories
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