480 Report on the Trials of Implements at Oxford. 
first peculiarity we notice is the moveable or expanding jaw to the mouth- 
piece, which jaw is hinged to the axle of the upper toothed roller, and is 
pressed down by a hand-screw, so as to securely hold the materials being cut, 
while admitting of considerable alteration according to the nature of the 
substances to be acted on. This will be understood by reference to Fig. 3. To 
Ticj. 3. — Trcmsverse Section of Messrs. Biclmond and Chandler's 
Chaffcutte); No. 4881, 
the axle of the roller h is hinged the segmental jilate </, the plate li being- 
held down by the handscrew c. This is a decided improvement, inasmuch as 
we can insure a certain amount of pressure, which is further increased by strong 
spiral screws on each side of the mouth, replacing the weight-lever, with this 
advantage — that the pressure increases as the feed becomes thicker. 
The point to which we would direct particular attention, as more especially 
influencing the power consumed, is the gearing arrangement by which motion 
is comniunicated from the tly-wheel to the feed-rollers, and this will be under- 
stood by reference to Fig. 4, which gives a plan of the machine. To the fly- 
wheel shaft c, are fixed two bevel pinions, k and I, gearing into two wheels of 
different diameters, one of which is keyed to I, while the other is loose on the 
line-shaft, and these two wheels arc connected, when required, by clutch-gear. 
The pinion 7c gears into the large wheel, k i, which is loose on the line-shaft ?«, 
whilst the pinion I gears into I i, which is keyed on the shaft. When the 
clutch-boxes are in gear, and the larger wheel is being driven, the line-shaft 
imparts a slow motion to the toothed rollers by the usual change-wheels and 
pinions shown at m i ; and when the clutch-boxes are out of gear, and the 
smaller wheel on the line-shaft is being driven, the rollers revolve at a gi'cater 
speed. The alteration of the line-shaft to and fro, to bring the clutch-boxes 
