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Scientific American, Vol. 87, No. 14 (1902) (1902)

leaf 4

An illustration from Scientific American, Vol. 87, No. 14 (1902), 1902, leaf 4
t desired hours. Negligence quarter hour, and the contact finger, C, is so geared In order to perform the best work, a pile driver in this particular might put a traveler to serious in- az to make 1-48 of a rotation while the cam, B, is must be regular and continuous in its action. The making a… … and this style of hammer was gradually supplanted by the most modern types, which are designed to com- DIAGRAM OF CONNECTIONS IN THE ELECTRIC CALL bine effectiveness, strength, simplicity and positiveness AUTOMATIC MACHINE FOR CALLING GUESTS IN of action. of pile, hard or soft, straight or crooked,…

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