Реферат: 17,960. Shaw, L. Sept. 7. Copying drawings etc.; printing; lighting- arrangements.-Relates to an apparatus for copying drawings and the like by artificial light, and consists of improvements on the apparatus described in Specification No. 5561, A.D. 1899. The tracing or other negative to be copied is wrapped round a glass or other transparent cylinder A, made up of two semi-cylinders held together by terminal discs B and three bolts C. The sensitive paper is then placed over the tracing, and the whole is held in place by two canvas covers connected at one end to hooks a' and at the other to rollers by which they can be tightened up. The arc lamp H is suspended by two cords l<1> connected to a counterweight l<2>, which is connected by a single cord to a winch I by which the lamp can be moved up and down in the centre of the cylinder to secure uniform printing. The cylinder is suspended on trunnions D, D<1>, and may be clamped in any position by the fly-nut M.
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Номер патента: RU0000000031U1. Автор: Касаткин Л.В.. Владелец: Государственный научно-испытательный полигон авиационных систем. Дата публикации: 1994-08-25.