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The first modern horn antenna in 1938 with inventor Wilmer L. Barrow. A horn antenna or microwave horn is an antenna that consists of a flaring metal waveguide shaped like a horn to direct radio waves in a beam. Horns are widely used as antennas at UHF and microwave frequencies, above 300 MHz. [1]
A hornbook (horn-book) is a single-sided alphabet tablet, which served from medieval times as a primer for study, [1] and sometimes included vowel combinations, numerals or short verse. [2] The hornbook was in common use in England around 1450, [3] but may have originated more than a century earlier. [4] The term (hornbook) has been applied to ...
Rate of fire. 500–550 rpm. Muzzle velocity. 633 m/s. Feed system. 30-round detachable StG 44 box magazine. Sights. Iron, fixed to 300 m. Grossfuss Sturmgewehr was a prototype assault rifle designed during World War II by Kurt Horn at the Grossfuss company better known for their contribution to the German arsenal made with the MG 42.
The Leslie speaker is a combined amplifier and loudspeaker that projects the signal from an electric or electronic instrument and modifies the sound by rotating a baffle chamber ("drum") in front of the loudspeakers. A similar effect is provided by a rotating system of horns in front of the treble driver. It is most commonly associated with the ...
Yellow. Withdrawn. 1958–1965. Disposition. One preserved, remainder scrapped. The Great Western Railway (GWR) 2251 Class or Collett Goods Class was a class of 0-6-0 steam tender locomotives designed for medium-powered freight. They were introduced in 1930 as a replacement for the earlier Dean Goods 0-6-0s and were built up to 1948.
Also Centering spring cylinder. A cylindrical cast-iron holder in which an adjusting string is placed. Adjusting spring seat A casting, or a part of the bolster of a two-wheel trailing truck, forming a bearing for the end of the adjusting spring. Admission The opening of steam port to admit steam to one end of a cylinder. If the valve has no lead, admission takes place at the moment the piston ...
Ultrasonic horn. An ultrasonic horn (also known as acoustic horn, sonotrode, acoustic waveguide, ultrasonic probe) is a tapering metal bar commonly used for augmenting the oscillation displacement amplitude provided by an ultrasonic transducer operating at the low end of the ultrasonic frequency spectrum (commonly between 15 and 100 kHz).
HMS Albion is a landing platform dock of the Royal Navy, the first of the two-ship Albion class.Built by BAE Systems Marine in Barrow-in-Furness, Albion was launched in March 2001 by the Princess Royal.