This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1905 Excerpt: ...end thrust along the shaft in order to make the clutch drive properly. For a = about 15 the surfaces will free themselves whenP is relieved. "a= " 12," " require slight pull to be freed. "a--" 10'," " cannot be freed by direct pull of the hand, but require some leverage to produce the necessary force P. PROBLEMS ON ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1905 Excerpt: ...end thrust along the shaft in order to make the clutch drive properly. For a = about 15 the surfaces will free themselves whenP is relieved. "a= " 12," " require slight pull to be freed. "a--" 10'," " cannot be freed by direct pull of the hand, but require some leverage to produce the necessary force P. PROBLEMS ON FRICTION CLUTCHES. 1. With what force must we hold a friction clutch in to transmit 30 horse-power at 200 revolutions per minute, assuming working radius of clutch to be 12 inches; coefficient of friction 15 per cent; angle i/ = 10? 2. How much horse-power could be transmitted, other conditions remaining the same, if the working radius were increased to 18 inches' 3. What force would be necessary in problem 1, if the angle a were 15, other conditions remaining the same? COUPLINGS. NOTATION.-The following notation is used throughont the chapter ou Couplings: D = Diameter of shaft (inches). Sc =Safe crushing fiber stress (lbs. per d = Diameter of bolt body (inches). sq. in.). n = Number of bolts. T =Twlsting moment (Inch-lbs.). R = Radins of bolt circle (Inches). (=Thicltness of flange (inches). S = Safe shearing fiber stress (lbs. per VV = Load on bolts (lbs.). aq. In.). ANALYSIS. lligid couplings are intended to make the shafts which they connect act as a solid, continuous shaft. In order that the shaft may be worked up to its full strength capacity, the coupling must be as strong in all respects as the shaft, or, in other words, it must transmit the same torsional moment. In the analysis of the forces which come upon these couplings, it is not considered that they are to take any side load, but that they are to act purely as torsional elements. It is doubtless true that in many cases they do have to provid...
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Add this copy of Cyclopedia of Drawing to cart. $19.00, good condition, Sold by Between the Covers-Rare Books rated 5.0 out of 5 stars, ships from Gloucester City, NJ, UNITED STATES, published 1905 by Arnmour Institute.
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