Hiscox, Gardner Dexter, 1822?-1908 · New York, The Norman W. Henley publishing co. · leaf 249
932. BALL GEAR with traverse pinionSoa very limited traverse of the pinions. Has 933. SPIRAL GEARING.—V gearing, in whichthe teeth are at a small angle with the plane of rota-tion, makes a perfectly silent transmission of power. … 934. EXPANDING PULLEY.—The sec-tional rim pieces with their arms have a radialsliding joint on the hub arms, and are movedout or in by pins projecting into the spiralslots on the central spur-gear wheel. Themovement of the wheel <r, by turning the ratchetpinion d, moves all the sections of the…
Mechanical movements
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