ard end so as to take a pin fixed to the crosshead or piston rod , for direct - acting engines , is by far the simplest arrangement , the cord being attached to the top , a short distance from the vibrating centre . AB in the figure represents the full stroke of the piston , and C D the reduced… … engine . This pulley is fitted with a strong Fig . 85 . — Lever for actuating the Roller of Indicator . spring , similar to a watch - spring , and the strain is imparted to this spring instead of to the delicate one in the instrument . Of course it is necessary to have a smaller pulley on the same…
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