tmosphere. In order to fill the vacuum thus created, the toturn at the rate of from 1,000 to 2,000 running feet per tive view of one of Wilder’s Patent Punching Presses of the hour. smallest size, without gearing, and a vertical section of the The power is applied on the cone pulley, A, into which… … pressed down the press will op- head. . The connecting rod, K, erate, but if the foot be removed through which the mallet, G, is. the plunger will instantly stop and always in the high- est position, an advantage of no little moment, as all ma chinists know. By removing the foot from the treadle as…
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