By Henry T. Brown
This 1868 compendium of inventive mechanisms employs uncomplicated drawings to give an explanation for 507 of the small parts that represent complicated equipment. Left-hand pages function illustrations, and dealing with pages provide short descriptions of use and operation. starting from easy to complicated, the mechanisms contain cranks, pulleys, drills, wheels, and screws.
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Extra info for 507 Mechanical Movements. Mechanisms and Devices
224. This represents an expanding pulley. On turning pinion, d, to the right or left, a similar motion is imparted to wheel, c, which, by means of curved slots cut therein, thrusts the studs fastened to arms of pulley outward or inward, thus augmenting or diminishing the size of the pulley. 225. Intermittent circular motion of the ratchet-wheel from vibratory motion of the arm carrying a pawl. 226. This movement is designed to double the speed by gears of equal diameters and numbers of teeth—a result once generally supposed to be impossible.
Resembles 1, with the addition of a movable tightening pulley, B. When this pulley is pressed against the band to take up the slack, the belt transmits motion from one of the larger pulleys to the other ; but when it is not, the belt is so slack as not to transmit motion. 6. By giving a vibratory motion to the lever secured to the semi-circular segment, the belt attached to the said segment imparts a reciprocating rotary motion to the two pulleys below. 7. A method of engaging, disengaging, and reversing the upright shaft at the left.
134. Uniform circular motion into rectilinear by means of a rope or band, which is wound once or more times around the drum. 135. Modification of the triangular eccentric 91, used on the steam engine in, the Paris Mint. The circular disk behind carries the triangular tappet, which communicates an alternate rectilinear motion to the valve-rod. The valve is at rest at the completion of each stroke for an instant, and is pushed quickly across the steam-ports to the end of the next. 136. A cam-wheel—of which a side view is shown—has its rim formed into teeth, or made of any profile form desired.
507 Mechanical Movements. Mechanisms and Devices by Henry T. Brown