Description of Swath Turners. 
123 
tube bent down at the front end to form the pivot for a small 
swivel wheel, and having at the rear end a double socket 
attachment to two axle bars. These bars are cranked at their 
outer ends and carried by the travelling wheels. The inner 
end of each axle bar carried a double eye piece, through which 
the other axle bar is passed, thus keeping the double axles 
parallel with each other. The inner axles are toothed so as 
to form a rack, into which a small pinion works. This pinion 
is capable, by means of a key, of expanding and contracting 
the length of the axle, being fixed by an arrangement of wedge- 
headed locking bolts, in any position simply and quickly. An 
expanding bar hung hy chains attached to a lever at the bend 
of the central body carries the fore-ends of the turning 
mechanism shafts, the rear ends being supported in connection 
with the gearing of the travelling wheels. The expanding bar 
admits of the width between the turning heads being increased 
in sympathy with the axle from 4 ft. to 6 ft. 6 in. centre to 
centre. The driver is enabled by means of this lever to raise 
or lower the turning heads as desired. 
Probably the most ingenious parts of these machines are 
the turning mechanisms, which consist of bent teeth, the rear 
ends of which are attached to the bevelled cogged head by 
pivotal pins and are supported in the centre hy stays, the teeth 
being passed through an eye at one end of these stays and 
the other end of the stay being hooked into a hollow disc 
secured to the shaft as shown on the above drawing (Fig. 2). 
In practice this acts as an eccentric and imparts the motion 
required to the revolving teeth. 
