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In the Middle Ages, Termagant or Tervagant was the name of a god that some European Christians believed Muslims worshipped. [ 1 ] [ 2 ] It originates in the eleventh-century Song of Roland The word is also used in modern English to mean a violent, overbearing, turbulent, brawling, quarrelsome woman; a virago , shrew, or vixen. [ 1 ]
Atlas Press Co. was a tool company that manufactured popular brands of metalworking tools from 1920 to the mid-1970s. Many of their products received wide coverage in Popular Mechanics and Popular Science at the time.
In 1942, Walker-Turner released its first Radial Arm Drill Press, the RD-1170. [1] 900 Series Drill Press, Serial # 1 944. Through 1942-1945, during the years of the United States' involvement in World War II, much of Walker-Turner's production capacity was focused on the war effort. Catalogs and other documentation from this period may be scarce.
early Fein portable electric drill In 1867, he and his brother Carl founded their own company . Amongst other inventions, he invented an electric motor for machine tools.
Cross-section of switched reluctance machine with 6 stator and 4 rotor poles. Notice the concentrated windings on the stator poles. A reluctance motor is a type of electric motor that induces non-permanent magnetic poles on the ferromagnetic rotor. The rotor does not have any windings. It generates torque through magnetic reluctance.
Production of 3.75 kW (5.03 hp) electric motors and 10kVA transformers began in 1948. Later, production of motors and pumps for rural irrigation began. In October 1975 it became an integrated machinery factory, and on 25 September 1980 the Taean Electric Factory and the Taean Machinery Factory were merged to form the current Taean Machine Complex.
A drill press is a drilling machine suitable for quick and easy drilling of straight holes, countersinking or counterboring that are perpendicular to both directions of a table surface. In comparison, it is more difficult and less repeatable to drill perpendicularly with a hand-held drill.
Quill drives were used by many electric locomotives in the United States, particularly those of the Pennsylvania Railroad—their long-lasting GG1 design being perhaps the best known. Many locomotives built in France , Germany , Italy and Poland used quill drives as well, allowing higher locomotive speed.