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Title: |
1893 Article-Harrisburg Foundry & Machine Works, Tandem Compound Steam Engine |
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Source: |
Cassier's Magazine May 1893, pg. 47 |
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Insert Date: |
11/12/2012 8:40:02 PM |
The exhibit of the Harrisburg Foundry & Machine Works, of Harrisburg, Pa., consists of two engines driving line shafting. One of these engines is the company's standard Ide pattern, automatic, tandem-compound, side-crank engine, with outboard bearing. The cylinders of this engine measure seventeen and twenty-eight inches in diameter, and have an eighteen-inch stroke. The engine is rated at 300 horse-power, when running non-condensing, and at a speed of 180 revolutions per minute. The fly-wheel pulley is 102 inches in diameter and has a thirty-one inch face. Both the high and low pressure valves are adjustable piston valves, designed by Mr. M. E. Hershey, the general manager of the company, and each is worked by a separate eccentric. The high-pressure valve is controlled by the fly-wheel governor, while the low pressure valve is made adjustable by hand to meet the varying conditions under which the engine might be called upon to work.
The other engine shown by the company is the Harrisburg Ideal tandem-compound, with one fly-wheel pulley, 102 inches in diameter, with an eighteen inch face. A second main driving pulley is made of the same diameter, but with a thirty-one inch face, and has a special, outboard bearing. The valves are worked from eccentrics on opposite sides of the engine, the high-pressure valves being controlled by the automatic governor, and the low-pressure valve by an independent, adjustable eccentric. Both valves are of the same design as those used in the engine just described. The cylinder capacity, power and speed of the engine are also the same.
A twelve by twelve inch Ideal self-oiling engine is to be placed by the side of the larger engine, without any anchorage to a foundation. The engine is to be raised about six inches from the base plate, and is to be supported on three points. In this condition the engine will be run up to a speed of 300 revolutions per minute to show its perfect balance, and the special adaptability of this type of engine for electric light work where cleanliness, quiet running, and balance of all running parts are particularly desirable. |
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1893 Harrisburg Foundry & Machine Works, Tandem Compound Steam Engine
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