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Image from page 294 of “The Street railway journal” (1884)
Image by Internet Archive Book Images
Title: The Street railway journal
Year: 1884 (1880s)
Subjects: Street-railroads Electric railroads Transportation
Publisher: New York : McGraw Pub. Co.
Contributing Library: Smithsonian Libraries
Digitizing Sponsor: Smithsonian Libraries
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Text Appearing Before Image:
ISOMETRIC DIAGRAM OF PUMP CONNECTIONS was emptied into a somewhat larger storage tank by meansof a 4-in. pipe closed by a quick acting valve. In the 10-in.neck of the weighing tank an overflow pipe led to drain.As the tank was filled to this overflow, and allowed to drainfrom that point, the amount of water contained in the tankwas identical for each filling. The tank was filled and then the water drawn off into a barrel placed on the test scalesand thus weighed. This was repeated several times, andthe readings gave only from .5 lb. to I lb. difference in 3676lbs. for a full tank. The boiler feed pumps drew direct fromthe storage tank above mentioned. It will be noted that the temperature of the feed was
Text Appearing After Image:
VOLTMETER RECORD, MAR. 10, 1899 much lower than in practice because of the drawing fromthe tank, and not from the heater. The tables give thevalue of the difference. BOILER TEST 1. Date of trial Feb. 12,98. Feb. 14,98. 2. Duration of trial 20.63 hrs. 20 hrs. DIMENSIONS AND PROPORTIONSFirst day, two grates.Second day, three grates. 3. * Grate surface—length, 6 ft. 1 in.; width, 7 ft. 8 ins. Area sq. ft. Makers rating projected area. Water heating surface sq. ft. Super-heating surface sq. ft. Ratio of water heating to actual grate surface Ratio of water heating to projected grate surface… AVERAGE PRESSURES Steam pressure by gage lbs per rq. in. Absolute pressure lbs. Atmospheric pressure by barometer, ins. mercury.Force of draft between damper and boiler, ins. of water ins. .2 143 926,0760 42.4866.03 131.6145.9329.25 214.51389,114 0 42.4866.03 132.1146.4429.26 AVERAGE OF TEMPERATURES 13. Of external air degs. F. 42 14. * Of feed water entering boiler degs. F. 39 15. Of boiler flue g
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