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The company was founded by George D. Roper in 1890, primarily as a manufacturer of home appliances, pumps, and other industrial products. He entered part ownership in the Van Wie Gas Stove Company of Cleveland, Ohio. The Van Wie plant moved to Rockford, Illinois and passed into trusteeship in the early 1890s. George D. Roper became the sole ...
Different types of pumps are suitable for different applications, for example: a pump's maximum lift height also determines the applications it can be used for. Low-lift pumps are only suitable for the pumping of surface water (e.g., irrigation, drainage of lands, ...), while high-lift pumps allow deep water pumping (e.g., potable water pumping ...
John Landis Mason, inventor of the Mason jar. In 1858, a Vineland, New Jersey tinsmith named John Landis Mason (1832–1902) invented and patented a screw threaded glass jar or bottle that became known as the Mason jar (U.S. Patent No. 22,186.) [1] [2] From 1857, when it was first patented, to the present, Mason jars have had hundreds of variations in shape and cap design. [8]
John L. Mason. John Landis Mason (c. 1832 in Vineland, New Jersey – February 26, 1902) was an American tinsmith and the patentee of the metal screw-on lid for antique fruit jars commonly known as Mason jars. Many such jars were printed with the line "Mason's Patent Nov 30th 1858". [1] He also invented the first screw top salt shaker in 1858.
Pump curves are quite useful in the pump selection, testing, operation and maintenance. Pump performance curve is a graph of differential head against the operating flow rate. They specify performance and efficiency characteristics. Performance tests are done on the pumps to verify the claims made by the pump maker.
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In major appliances, Maytag was among the top three companies in the North American market, offering a full line of washing machines, dryers, dishwashers, cooktops, refrigerators, and ranges under the Maytag, JennAir, Amana, and Magic Chef brands. Maytag also used to manufacture the top load laundry for Crosley until Maytag's merger with Whirlpool.