i5o8 



AGRICULTURAL MACHINERY 



essentiall}^ of an axle carrying a spiral blade. This does the work of a series 

 of little ploughs with the working parts : coulter, share and mould-board. 

 This mechanism is caused to rotate by the same motor which moves the 

 whole machine forward along the line of work. 



As the machine moves forward, the soil along the whole length of the 

 spiral blade is successive^ lifted and tiirned by the appropriate combined 

 action of the rotating and travelling gears. To provide the range of speeds 

 desired, the designer has fitted two sets of gearing operated by levers or 

 pedals. The speed of rotation is so controlled relative to the travelling speed 



]\'Iaili,KT Cultivator. 



Fig. 



General view. 



that any cut ma}^ be taken from a mere shaving to a large swathe, z. ^. 

 the soil is finely or coarsely cultivated. 



The motor and clutch are enclosed in a case 4 (fig. 2) which contains 

 the gears A and B giving the two speeds to the shaft 5, thence to the be- 

 vel-pinion 6 and bevel-wheel 7 keyed on the transverse shaft 8. On this 

 shaft two pinions C and D engage with the wheels 10 and 10 a ; this allows 

 the speed of shaft 11 to be varied according to which pair of wheels are in 

 gear. 



Forward 

 In gear movement Blades 



