UNCLE SAM GETS GIGANTIC CAMERA (Dec, 1932)
UNCLE SAM GETS GIGANTIC CAMERA
Big enough for an eight-year-old child to walk through, a camera that can use any plate from four by five inches to four by four feet, has been designed for the U. S. Geological Survey. It is suspended from an overhead track twenty-five feet long and four feet wide. This suspension prevents vibrations from the ground or building interfering with the apparatus. The great size provides for copying with the greatest precision and accuracy.
Of the total weight of practically three tons, the bellows alone weigh 450 pounds.
Its length, closed, is thirty inches; fully extended, it is eight and one-half feet. Even this is not enough for some of the work the camera is required to do, and additional length is provided by a thirty-six inch cone. The camera can enlarge eighteen diameters, or reduce a ninety-six inch drawing to two and one-half inches. The copy holder, weighing 1,000 pounds, moves on the track in either direction, and both it and the camera are mounted on roller bearings. Wet plates, dry plates, or paper may be used in the cameras.