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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]
As a practical motor it has several disadvantages. Magnetic field strength drops off rapidly with increasing distance. In the reciprocating electric motor the distance between armature and field coil must necessarily increase considerably over its minimum value; this reduces the motor's output power and starting force. Vibration is also an issue.
In 1926, Porter-Cable began to develop a niche in portable electric power tools when Chief Engineer Art Emmons invented the portable electric belt sander, called the Take-About Sander. In 1929, Emmons invented the helical drive circular saw, a compact, lightweight design that is still the most widely used circular saw design produced today.
The early electric routers were quite heavy, [5] and only nominally "portable". In 1915 Oscar and Rudy Onsrud produced an air-powered router, which they referred to as a Jet Motor Hand Router. [6] In the 1930s, Stanley Works acquired a line of portable routers from Roy L. Carter, and marketed an 18000 RPM electric hand router similar to modern ...
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Internal combustion engines of early 20th century automobiles were usually started with hand cranks (known as starting handles in the UK), before electric starters came into general use. The last car model which incorporated a crank was the Citroën 2CV 1948-1990 The 1918 Reo owner's manual describes how to hand crank the automobile: