484 Report on the Trials of Implements at Oxford. 
Fig. 8. — Plan of Messrs. Picksley, Sims, and Co.'s Chaffcutter, 
No. 3182. 
The engraving illustrates the clutch in gear, with the bevel pinion D, which 
gives the forward motion to the feed-rollers ; by shifting the handle F until it 
is stopped by the catch /, the clutch is thrown out of gear, being left midway on 
the shaft between the two jiinions. If the catch / be raised, the handle may be 
moved further over, and the clutch gears into c, which gives the backward motion 
to the feed — which is considered desirable when it is necessary to clear the box. 
G represents a clutch in the bevel wheel-shaft, fitted with a parallel key ; H, a 
large spur pinion (with clutch-teeth on the fan), working loose on the shaft, 
and gearing into a small sjiur-pinion on the counter-shaft, K. 
The clutch G is shown in gear with the small spur-pinion I, which com- 
municates the slower motion to the feed-rollers, and consequently gives 
the f inch cut. By moving the handle L, the clutch may be thrown into 
gear with the large spur-pinion H, which communicates the faster motion to 
the feed-rollers, and gives the long cut. M, a spur-pinion on the counter- 
shaft, K, gearing into a spur-wheel, N, on the end of the bottom feed-roller 
shaft. By changing the wheels M and N, any other two lengths of chaff may 
be produced. 0, a jointed shaft for the top feed-roller, which gets its motion 
by means of a spur-wheel, P, gearing in one of equal dimensions on the bottom 
feed-roller shaft. 
The worljing parts are well protected, the gearing simple and strong; the 
mouth of the box 14 inches by 5 inches. The feed-rollers are solid, and 
carry 15 rows of teeth. The knives, three in number, cover each other, two 
being at work at the same time. The chaft" was regular, and the box con- 
stantly full ; but it will be seen from the table that the power consumed was 
greater than with Richmond and Chandler's Machine, which is probably owing 
to more complicated gearing. The fly-wheel was noticeable for its weight — a 
desirable feature of a power-machine, as power is accumulated and given out as 
required. 
The chaffcutter for hand-power, by the same firm. Fir/. 9. Sliding Pinion. 
No. 3183, fig. 9, has no clutches. The change of cut 
is produced by means of a sliding pinion, thus placed 
on the bevel wheel-shaft, in lieu of the clutch and clutch- 
pmions. 
The chief peculiarity in (Jnrson and Tootle's chaff- 
cutter 2669, which was highly commended, consists in two pairs ofrollers to assist 
the feed, these being grooved, instead of toothed. The mouth of the box is not 
nearly so large as in several instances, only 10^ by 4 inches, yet, owing to the 
