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The Company moved to a green field site at Queens Park, Bedford in 1894 and the name was changed to W. H. Allen Son and Company. [3] [5] [6] [4] In 1900 the business was incorporated as a limited company. Steam turbine production and diesel engine manufacture for driving pumps and electrical generators commenced in 1908.
Harbor Freight Tools, commonly referred to as Harbor Freight, is an American privately held tool and equipment retailer, headquartered in Calabasas, California. It operates a chain of retail stores, as well as an e-commerce business. The company employs over 28,000 people in the United States, [5] and has over 1,500 locations in 48 states. [6] [7]
Damper winding. Bars and rings of the damper (amortisseur) winding of an AC generator (General Electric, early 20th century). Note the gaps in the cage along the quadrature axes. The damper winding (also amortisseur winding[1]) is a squirrel-cage -like winding on the rotor of a typical synchronous electric machine.
Harmonic balancer lower pulley on a four-cylinder engine. A harmonic damper is a device fitted to the free (accessory drive) end of the crankshaft of an internal combustion engine to counter torsional and resonance vibrations from the crankshaft. This device must be an interference fit to the crankshaft in order to operate in an effective manner.
An advertisement for Allen safety screws would appear in the 1910 Annual Convention of International Association of Factory Inspectors. [6] In 1922, Allen Manufacturing Company produced sets of tools under the company name "Bay State", suggesting that they may have privately acquired another hardware manufacturer, namely the Bay State Pump Company.
Worthington Corporation. The Worthington Corporation was a diversified American manufacturer that had its roots in Worthington and Baker, a steam pump manufacturer founded in 1845. In 1967 it merged with Studebaker and Wagner Electric to form Studebaker-Worthington. This company was in turn acquired by McGraw-Edison in 1979.
Peristaltic pump in motion. A peristaltic pump, also commonly known as a roller pump, is a type of positive displacement pump used for pumping a variety of fluids. The fluid is contained in a flexible tube fitted inside a circular pump casing. Most peristaltic pumps work through rotary motion, though linear peristaltic pumps have also been made.
Damper (flow) Opposed blade dampers in a mixing duct. A damper is a valve or plate that stops or regulates the flow of air inside a duct, chimney, VAV box, air handler, or other air-handling equipment. A damper may be used to cut off central air conditioning (heating or cooling) to an unused room, or to regulate it for room-by-room temperature ...