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Barn doors, or occasionally a set of barn doors, are an attachment fitted to the front of a Fresnel lantern, a type of lantern used in films, television, and theatres. [1] The attachment has the appearance of a large set of barn doors, but in fact there are four leaves, two larger and widening on the outside, two smaller and getting narrower ...
Other common accessories include gobo holders or rotators, iris holders, donuts, barn doors and color scrollers. Gobos are templates made from a thin piece of metal that have designs to project patterns. An Iris is an accessory which can alter the size of the projected beam of light.
A patent was issued in September 1933. Following World War II, hardware for sectional doors was developed and in 1950, Frantz introduced its Model 200 Garage Door Series. Along with the hardware sets, wooden sectional panels were offered and gained popularity. In 1958, Frantz bought a controlling interest in Sterling Electronic Door Control ...
William added to the company's product line with his inventions of a flexible barn door hanger (1895), barn litter carriers and tracks (1898), all-steel cow stalls (1907), individual automatic watering bowls for cows (1912), an Easy Feeding Hog Trough (1914), and an industrial line of Overhead Carrying Equipment (1917).
A rock-climbing technique where a leg is held in a position to maintain balance, rather than to support weight, often to prevent a barn-door. [2] There are three types of flagging: [12] [11] normal flag Flagging foot stays on the same side (e.g. flagging right foot to the right side of the body). [12] [11] reverse inside-flag
Pole building design was pioneered in the 1930s in the United States originally using utility poles for horse barns and agricultural buildings. The depressed value of agricultural products in the 1920s, and 1930s and the emergence of large, corporate farming in the 1930s, created a demand for larger, cheaper agricultural buildings. [2]
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