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But the vicious jerks on the torture-provoking cavalry bit, the flat sabre blows on the flank which he not infrequently got from his ill-tempered master, and, above all, the cruel digs of the spur-wheels these things he could not understand. Such treatment he was sure he did not merit. "Mars" Clayton he came to hate more and more.
His first engine had two vertical cylinders of eight inches diameter and two-feet stroke, working by cross-heads; the power was given off by spur-wheels; it had no springs, consequently it jolted very much on the then bad railways; the wheels were all smooth, as Stephenson was sure the adhesion would be sufficient.
There is no swing frame, but the top roll is arranged to draw through between the arms of the spur-wheels, a very substantially framed machine being thus obtained. The chief novelty in the machine is the additional roll provided under the ordinary bottom rolls.
The inner half of the clip or brake is fixed solidly to the block, while the outer half is carried by two screws, geared together by spur-wheels, and so cut that although rotating in opposite directions, their movements are equal and similar. One of the screws carries a light rope-wheel, by which it can be rotated, the motion being communicated to the second screw by the toothed wheels.
Careful and cautious observation of the working of his locomotive had convinced him that the complication arising out of the action of the two cylinders being combined by spur-wheels would prevent its coming into practical use. He accordingly directed his attention to an entire change in the construction and mechanical arrangements of the machine; and in the following year, conjointly with Mr.
Each of the bottom rolls carries at its end a large spur-wheel, these spur-wheels, which are on opposite sides of the machine, each gearing into a pinion on a shaft which runs from end to end below the rolls, and which is itself geared to the shaft carrying the belt pulleys, as shown. This is a very simple and direct mode of driving, and avoids the necessity for small wheels on the rolls.
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