This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1896 edition. Excerpt: ...of two parts bolted together. There is no water jacket, but the cylinder has plain ribs cast on to it, which enables the surrounding atmosphere to do all the cooling that is required. The gas is ignited by an electric spark at the end of a plug containing the wires. The two valves in each cylinder are horizontal, which is not a suitable arrangement. They are worked mechanically by two cams fixed to an intermediate shaft revolving at half the speed of the main shaft. This reduction in speed is obtained by two toothed wheels having a ratio of 1 to 2. As in the car motor, one of the cylinders is drawing in the charge while the other is exploding it. The valves close on their seats by means of springs. The crank consists of two discs keyed to the main shaft and connected together by the crank pin; they dip into the oil contained in the air-tight casing, so that the machinery of the motor is well lubricated. Each piston has a 3-inch stroke, and the amount of compression is practically the same as in the car motor. The motor has a speed of about 400 revolutions per minute, a power of 2 effective horse-power, and consumes about 0'll gallon of petroleum per horse-power per hour. The car motor supplies over 4 horse-power for the same speed, as the stroke of the piston is double and the area of each piston is greater than that of the one just described. The electric spark is produced very economically, two cells, a Ruhmkorff coil, and an igniting plug being all that is required. Normally the current does not pass through the coil, whose contact piece is kept off by a small grooved cam; when the groove of the cam comes into play the commutator is freed, and oscillates several times before being kept off again by the cam. Consequently, as the current...
- Paperback | 72 pages
- 189 x 246 x 4mm | 145g
- 13 Sep 2013
- Illustrations, black and white