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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1888 Excerpt: ...lift water as far as any piston Pump, and work against any pressure ranging from, say, 10 to 50 pounds, discharging a constant stream of water, or other fluid, at any desired point remote from the Pump. When wanted for pumping hot liquids it is necessary that we should be advised of it, as we put in a metallic valve in that case. Bronze Pumps should always be used for distilleries, malt houses, etc. The whole inside working and principle of our Pumps are obvious from the sectional illustrations given below, in which Fig. 299 represents the cams used in our smaller Hand Pumps, and Fig. 300 those in our large power Pumps. INTERNAL SECTION CUTS OF OUR ROTARY PUMPS. The peculiar formation of these revolving cams or pistons was acquired after long experimenting and successful practice, and has demonstrated them to be of such a shape as to produce the very minimum of friction and wear with the greatest results. The cases which receive these cams are engine lathe turned and bored and so perfectly true and smooth that the cams when in operation create almost a perfect vacuum and will pick up water quicker, for along distance, and hold it better than any other Pump. The cams are not rough castings, sand ground, as those in some inferior Pumps, but are carefully and accurately planed to mesh into each other and fit their case perfectly. It is also a point worth noting that if a little good oil be put into the case of our Pumps before and after using at first, or simply pump air with this oil a few times, the cams become as hard upon the surface as fine tempered steel, and are almost unaffected by constant use afterwards. 136 GOULDS MANUFACTURING O?. GOULDS ROTARY FORCE PUMP. WITH LIGHT BALANCE WHEEL FOR MANUAL POWER. Fig. 297 represents one o...

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9781130046526

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