[1599]. 2-speed bevel gear with four wheels and sliding shaft.
[1600]. Increasing speed cone and screw, friction gear. The cone is driven by frictional contact with the pinion.
[1601]. Variable fulcrum lever, with shifting pin and hole adjustment.
[1602]. Fusee barrel, as used in clocks and watches to equalise the tension of spring on the movement; may also be employed to give a variable speed. The spring is usually similar to [No. 1484], and coiled in the upper barrel.
[1603]. Variable throw crank pin and slot, much used for variable feed motions in combination with some type of pawl and ratchet gear.
[1604]. Variable travel imparted to the piston rod from the crank by altering the point of attachment of the link A to the slot.
[1605]. Variable power pistons, single-acting.
[1606]. Effects the same ends as [No. 1601] or [1585], by shifting the fulcrum point along the slot by means of a screw.
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