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    • 9. 发明专利
    • Improvements in arc lamps
    • GB166627A
    • 1921-07-28
    • GB761420
    • 1920-12-14
    • ADOLPH HARRY RAILINGARTHUR ERNEST ANGOLD
    • H05B31/22
    • 166,627. Railing, A. H., and Angold, G. E. Dec. 14, 1920. Arc lamps.-In a lamp to be used in conjunction with daylight for photography, and having an operating - solenoid A placed at about the level of the arc B and behind a reflector C so as to minimize daylight shadow, a long lever D is linked at one end to the solenoidcore E and at its other end is forked and connected by symmetricallyarranged links to a clutch F acting on the upper carbon J, the holder of which runs on fixed guides K, K . The lever D may work on a knife-edge, and gives a long stroke for a small angular movement. A dashpot M is connected to the lever. Magnetic disturbance of the arc is avoided by having the solenoid A parallel with the carbons and level with the arc. The guide rods K, K are in the same plane as the arc and solenoid, and the reflector C is small, though larger than the solenoid A. As the lamp has a low centre of gravity, it can conveniently be suspended by an eye O or attached. by the lower part of the frame P to a pedestal.