2 GO Report on the Trials of Reaping Machines at Leamington, 
are passing. Fig. 4 is a section showing the contrivance by which these 
changes in the speed of working the switch are accomplished. Upon the 
fixed upright shaft or axis d, carrying the wheel and boss to which the rake- 
arms are hung by joints, and immediately underneath and within that wheel 
are three toothed pinions, q 1 , r/, g 3 , formed in one piece, and able to turn freely 
on the axis. They can be set fast to the wheel or rake-carrier, so as to turn 
with it, by means of the sliding clutch r, this clutch being held in gear with 
the pinions by a spiral spring, but raised so as to throw the pinions out of gear 
with the rake-wheel, whenever the driver puils a cord attached to the clutch- 
lever. 
Fig. 4. — Vertical Section of Messrs. Hornsby and Sons' Contrivance for 
varying the speed of Ralie delivery. 
The wheels q 1 , (/, tj 3 , gear with other wheels, s 1 , s 2 , s 3 , mounted loosely upon 
a hollow axis p, which is carried by a bracket as shown ; and within this 
axis there is a sliding bolt, t, with a nib, o, upon it, which projects through 
a slot in the side of the axis, and enters into a notch formed for it in one or 
other of the wheels s 1 , s 2 , s 3 . In the position shown by the drawing, the bolt 
being in its highest position, the nib upon it engages with the wheel s\ and 
renders this wheel fast with the axis p. t 1 is a handle which is able to slide 
along the bolt t, being held between two springs which tend to keep it mid- 
way between them ; the handle itself is in two parts, as the drawing indicates, 
and one slides on the other, so that the handle may be set and cocked at plea- 
sure in one or other of three holes, u, which communicate the one with the other. 
When the handle has been moved from one hole to another, the bolt follows it 
as soon as the rotation of the wheels s l , s 2 , &c, brings the notches in them to 
coincide, so that the nib may be able to pass from one to the other. The 
delivery will be effected either by the second, third, or fourth (or it might be 
the third, fourth, or fifth) rake, according as the handle t 1 is placed in the 
upper, middle, or lower hole ; or the operator can cause every rake in passing 
to clear the platform, and then what is practically a swathe delivery is ob- 
tained. This he does by throwing the clutch r out of gear when the switch is 
raised. Or again, the operator can at pleasure hold off the delivery for any time 
that he may desire, by throwing the clutch out when the switch is down. 
