New Engine for Riding. 



)1 



The method of its adaptation to its Avork is as follows : — It is set 

 up in an outer room adjacent to the small specially constructed room 

 in which the ruling machine is housed. When at work the engine 

 is regulated to run at about 250 revs, per minute. This speed is 

 reduced to about one-fourth by means of leather bands and alu- 

 minium speed reducing pulleys. Motion is given to the machine 

 by a cord passing directly from the reduced drive, through a 

 narrow slot in the wall of the machine house, to the driving wheel 

 {60) on the main shaft (57) of the ruling machine. The shaft (57) 

 is supported on a portion of an underframe which comprises three 

 parts indicated on the plan as B, C and D. It will be noted that 

 plate D rests upon and is bolted to B and C, which in turn are 

 attached, by means of angle brackets, to the lower projecting flange 

 of the machine bed. This construction has the merit of greatly 

 reducing the weight of the whole machine and yet secures sufficient 

 rigidity. 



Describing in order the parts of the machine supported on D, B 

 and C; D carries on its upper surface two stout iron pillars, one 

 near each end, which support the driving shaft (57), a circular 

 rod of steel about 28 inches long, resting on bearings (55) with 

 adjustable collars (56). Near its right-hand end are two cam collars 

 {58 and 59). These are constructed so as to slide along the shaft, 

 and are recessed on their inner faces. Within the recess is placed 

 a cam, provided with means for lateral displacement as required ; 

 it lies immediately under its lubricating pad and spring (62). A 

 slotted, under cut, circular brass disc (54) is screwed to the opposite 

 end of the main shaft, and provides for the eccentric adjustment of 

 the crank bar head (53). The range, up to three inches, of this 

 adjustment governs the length of the lines. On inspection of Plates 

 VII., VIII. and X. will serve better than further verbal description 

 to make clear the construction and relations of the j^arts just named. 



The second plate, B, carries a single substantial iron pillar (64) 

 which forms the main support and fulcrum of the steel lever bar 

 {61). One end of the lever passes under the cam on 57, and is 

 pivoted at 63, with provision for adjustment and alignment in 

 relation to both cam and ratchet wheel. The ratchet end of the 

 lever is fitted with a small and carefully made frame which supports 

 and controls the pawl or pawls engaging the ratchet teeth (9). The 

 pawls are fitted with the utmost care and are controlled through 

 the agency of the several parts of the frame (66 to 69). Just below 

 the frame carrying the pawls is a support provided with screw 



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