File:Appleton's dictionary of machines, mechanics, engine-work, and engineering (1861) (14597424578).jpg

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Identifier: appletonsdiction02appl (find matches)
Title: Appleton's dictionary of machines, mechanics, engine-work, and engineering
Year: 1861 (1860s)
Authors: Appleton, firm, publishers, New York. (1852, D. Appleton & Co.)
Subjects: Mechanical engineering
Publisher: New York : D. Appleton
Contributing Library: Smithsonian Libraries
Digitizing Sponsor: Smithsonian Libraries

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Text Appearing Before Image:
e levers L, (fig. 3110,) it will also actuate the catch by withdrawing the spring from the said pressureof the pins. The spring thus relaxed allows the passage of one pin, but backs against the next followingone. These are the means employed to feed the car, and consequently the paper, the distance of onesinjrle letter, until the whole line is completed. The knob q, is then pulled so as to bring the stud PL, (fig. 3110,) to bear against the first letter ofthe next following line. The moving of the paper in a direction perpendicular to the lines is effected bymeans of a spider-wheel v, made fast to the shaft end of the roller i, and by means of a lever 8, andspring u. When the car is pulled to the right, one of the spokes of the spider-wheel v is pressed againstthe inclined side of the lever S, and is turned the distance of two lines ; but when the car goes back, thespring u plays and the position of the spider-wheel v remains unchanged. The pulley similar to I is FEINTING MACHINE. 517
Text Appearing After Image:
518 PRESS, LITHOGRAPHIC PRINTING. free on the shaft of the band pulley, and carries a ratchet so arranged in relation to a ratchet wheel up-on the shaft, that when the car is moved to the right the pulley turns freely, and when the car moves tothe left the pulley carries the other pulley with it; the band is thus caused to follow the movements ofthe car and every letter strikes it in a different place. The band is placed between two pieces of paper,a thickone below and a thin one above ; by this means two copies are printed at the same time andwith equal facility.

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Author Appleton, firm, publishers, New York. (1852, D. Appleton & Co.)
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v. 2
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30 July 2014



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