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. 1921 Excerpt: ...is at A or C only. When the roll is at B, its center line is parallel to OI) and a distance BD from it. Time, 8 hours. 7. Make a sketch showing the theoretical curve for an inverse cam that will raise its reciprocating follower 1 in. during the first 30 revolution of the driving arm; to raise in. during the next 30; to ...
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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. 1921 Excerpt: ...is at A or C only. When the roll is at B, its center line is parallel to OI) and a distance BD from it. Time, 8 hours. 7. Make a sketch showing the theoretical curve for an inverse cam that will raise its reciprocating follower 1 in. during the first 30 revolution of the driving arm; to raise in. during the next 30; to rest during the next 30; to raise 2 in. during the next 20; to drop in. during the next 20, and to raise li in. during the next 50. Driving arm 6J in. long and turns counter-clockwise. 8. Design an oscillating follower cam to lower the rod CD 2 in. with uniformly accelerated and uniformly retarded motion in 120 of clockwise revolution of the cam; the rod CD to dwell for 120 and to rise 2 in. with uniformly accelerated and uniformly retarded motion. Diameter of roll = 1 ." Diameter of roll pin = j." Diameter of hub at B = If." Diameter of pin at B = I." Diameter of pin at C = ." NOTE.--Make a full-size ink drawing and leave off dimension? Time, 6 hours. 9. Design a cylindrical cam that will move a clutch 1 in. to the left along the shaft with harmonie motion in j revolution. Shaft to turn clockwise. Problem 9. Note.--The pin P is moved down by a system of levers operated by a pedal; when the pin P drops down below the cam, the clutch is forced along the shaft to the right by springs (not shown) engaging with the other half of the clutch. The shaft then turns and as the pin P engages with the cam, the clutch is disengaged. Make a full-size pencil drawing, showing the developed surface of the cam with all dimensions. Time, 4 hours. 10. Design a main and return cam that will move its follower 3 in. to the left with uniform motion during 135 of the cam's revolution. Rest for 45; return the follower to the starting point du...
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Seller's Description:
Very Good. Very Good book, lacking a dust jacket. Faint stains to covers, binding is tight, bright gilt titles to spine. Former owner has signed his name on first endpaper, pages are otherwise clean and unmarked. A few pages are dog-eared. An early work on mechanisms, much reprinted. This is the first edition, 4th printing. Small 4to 9"-11" tall. 169 pages. C2.
