Catalogue of the Mechanical Engineering Collection in the Science Division of the Victoria And Albert Museum, South Kensington Pt. 2
Catalogue of the Mechanical Engineering Collection in the Science Division of the Victoria And Albert Museum, South Kensington Pt. 2
Victoria And Albert Museum
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These parts, which form the "Stanhope levers," are so arranged that at the time the connecting rod is passing its dead centre with i*egaid to the hand lever, it is acting at its great^t leverage upon the vertical shaft. In this way a rapidly increasing mechanical advantage is obtained as the platen reaches the type, while only a constant amount of depression of the platen, adjustable at starting by a central screw, ^ill be obtained whatever the pull exerted on the hand lever. All modem hand-pre...sses act by such inci'easing leverage, now usually obtained, however, by a toggle-joint. 1448. Platen printing press. Received 1906. M. 34C0. This form of hand pi*es8, known as the Albion, was brought out about 1823 by Mr. R. W. Cope, although the principle adopted in its construction was made use of earlier. It is almost the only hand press now used, and then only ^here a limited number of impressions are required, such as proof-sheets. The general construction, except that iron is used instead of wood, is similar to that of the earliest types (see No.
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