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A barn door tracker, also known as a Haig or Scotch mount, is a device used to cancel out the diurnal motion of the Earth for the observation or photography of astronomical objects. It is a simple alternative to attaching a camera to a motorized equatorial mount .
August and Vera Luedtke Barn, sometimes the Fred and Vera Luedtke Barn, 1938 185th St., vicinity of Fairfield, Iowa (Architectural Department of the Louden Machinery Company) [1] McCafferty Run Farmstead, 17114 and 17226 OH 104, Chillicothe, Ohio (dairy barn north of the house attributed as a design of Louden Machinery Company), NRHP-listed [10 ...
Patented track rails are engineered specifically for overhead cranes and monorails. [9] [10] Unlike a symmetrical structural rail, the material in a patented track rail is placed where it is most effective allowing for a significant reduction in weight. The rails are engineered to be twice as strong as typical A-36 structural beams and have a ...
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