15 10 AGRICULTURAL MACHINERY 



The end of shaft 8 carries the sprocket 27 which drives the cultivator 

 by a chain. The axle of the cultivator is cast with flanges 36 to which the 

 spiral blades 37 are attached. 



The other end of shaft ii carries a pinion 12 which turns the driving 

 wheel 15 through a gear 13 mounted on the hub 14. 



As shown ill fig. 2, the hub 14 of the driving wheel is carried far out 

 on the axle 16 so that the load in the latter is as close as possible to the cen- 

 tre of gra\aty of the wheel. The track of the machine can be altered by mov- 

 ing the sleeve 17 along the axle 16 to which it can be fixed by bolts. 



To keep the machine level when at work, the lever 24 (fig. 3) is used ; 

 this is connected to a centre-piece 20 controlled by a hand lever. 



In another model, illustrated in fig. 4, the machine consists of a frame 

 40 carried by two wheels 41 which serve both for driving and steering; 

 the motor 42 and clutch 43 are covered by a bonnet 44. A first gear-box 

 47 controls both the travelling speed and that of the implement ; a second 

 gear-box 48 acts independently on the travelHng speed. This machine, 

 like that described above, provides two changes of speed ; to keep the axle 

 parallel with the plan of the machine on level ground, the hand controls 

 54 acts on the verticle springs 52 (fig. 5) ; on uneven country they allow 

 the wheels to adapt themselves to the irregularities of the ground without 

 altering the position of the machine laterally. Two other springs 53 act 

 horizontally and keep the track parallel to the frame. The machine is 

 steered by controlling these springs. A shoe 57 regulates the working depth 

 and keeps the direction. In working ridges this shoe is furnished with a 

 cutter. 



The cultivator 58, situated in the rear, is made in two portions, one with 

 a right and the other with a left-handed spiral, allowing for earthing up or 

 splitting the ridges. The machine can be used for all kinds of farm work ; 

 it will draw a plough or drive thrashing or other machines. 



There is a special model for vine^'ard work ; the constructional details 

 are similar to those reproduced in figs. 4 and 5. 



1 1 12 - Petrol Tractor for Drain Digging. — Perkins, Frank, in Engireenn« Record, Vol. 47, 



N" 5, p. 134. New York, JUI3' 29, 1916. 



Weight 15 tons ; motor 60 H. P. ; 2 caterpillars 30 in. wide allow the 

 machine to operate on soft land where teams could not well be used. The 

 tractor carries a drum 16 in. diameter by 24 in. long which can roll 1000 ft. 

 of ^/^ in. cable ; paying-out speed : 10 to 14 ft. per minute. Mode of ope- 

 ration : the plough, which can dig a drain 2 feet wide and 3.5 feet deep, is 

 attached to the tractor by the cable, the drum being- de-clutched, the trac- 

 tor moves forward to the finishing point. The drum clutch is then let in 

 and the cable wound up taut ; the tractor is kept stationary bj^ two anchors 

 situated in front. The cable is wound in until the plough reaches the end 

 of the drain. When it is desired to move forward the anchors are lifted. 

 Travelling speed : 2 miles per hour. 



