. Appleton's dictionary of machines, mechanics, engine-work, and engineering. [ J are transferred the length of their faces right and left; and as the sectors are edge shaped at their centreof motion o o, they necessarily revolve free from the impediment of rubbing surfaces, and consequentlywithout friction. When the eccentric wheels have made their revolution, the follower will have moved the sum of twoeccentrics. When the press is constructed so that the follower moves down, a spring G may be used toreturn the moving parts to their places when the press is relaxed.. 3108. & i» Another combin
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. Appleton's dictionary of machines, mechanics, engine-work, and engineering. [ J are transferred the length of their faces right and left; and as the sectors are edge shaped at their centreof motion o o, they necessarily revolve free from the impediment of rubbing surfaces, and consequentlywithout friction. When the eccentric wheels have made their revolution, the follower will have moved the sum of twoeccentrics. When the press is constructed so that the follower moves down, a spring G may be used toreturn the moving parts to their places when the press is relaxed.. 3108. & i» Another combination consisting of cccontvic sectors with a centre rollor, or it may bo made withplain sectors and eccentric roller, constitutes another form of tho press which is well adapted to purposesrequiring but little movement or traverse of tho follower. A A, Fig. 3104, aro two eccentric sectors; 15 is a centre roller ; C O are sections of the follower andDearing. Fig. 310G is an edge viow of tho same, showing the longitudinal extension of tho edges con- 5T6 PRINTING MACHINE. stituting the axes of the sectors. Fig. 3107 is a view of the same as it is set in the frame, with one sidsof the frame removed. Fig. 3108 is an edge view of the same with frame and lever all complete. For further illustration of mechanical devices which may be ranked among presses, see EmbossingMachine, Punching and Sheaking Machine, Printing Peess, etc., etc. PRINTING MACHINE, S. W. Francis Patent. The principal feature of tins Invention consists inarranging a row of hammers in a circle,