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Title: |
1892 Article-Robb Engineering Co., Stationary Steam Engine |
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Source: |
The Electrical Engineer, 27 Jul 1892, page 93 |
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Insert Date: |
10/8/2011 10:35:27 AM |
THE ROBB-ARMSTRONG ENGINE — The accompanying illustrations show a new engine of the single-valve automatic type lately introduced by the Robb Engineering Co. of Amherst, Nova Scotia. The engine weighs about 100 pounds per horse power, so distributed as to give the greatest attainable stiffness, while the foundation furnishes all the weight required. The frame, as will be seen by referring to Fig. 1, is of the "Porter" type with a double-disc crank particularly thick at the top, thus bringing the metal in the direct line of strains between the cylinder and shaft bearings. The crank is built up of cast discs and the fits of the shaft are very long, as seen in Fig. 2. The bearings are ground with great accuracy and both shaft and shells are made to gauge and are interchangeable. The crank is covered by a cast-iron case, which is hinged, as shown in Fig. 2, so that free access within may be had at all times. The crank-pin is oiled through two ½ inch holes, extending from either side of the crank to the centre of the pin, and all oil wasting from the outer ends of the shaft bearings is caught, and returned by a ring to the bearing, until it finds its way to the crank-pin and escapes to the crank-pit, whence it is drawn off and filtered. The flywheel governor is a modification of the “ Straight Line," and, with the valve and the oiling devices is used by arrangement with the Straight Line Engine Co. What corresponds to the eccentric rod, although there is no eccentric, has ball-and-socket bearings at each end. The rocker arm is horizontal, and there is no twisting strain on either of its bearings, as a straight line passes through all three of them. An index finger shows the movement of the valve. Oil passes to the eccentric pin through the hollow eccentric rod, and what escapes is caught and held in the flanged fly-wheel.
This engine was designed by Mr. E. J. Armstrong, of the Ames Iron Works, Oswego, N. Y., where it is built in this country. |
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1892 Robb Engineering Co., Stationary Steam Engine
1892 Robb Engineering Co., Stationary Steam Engine Diagram
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