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Scientific American, Vol. 45, No. 15 (1881) (1881)
leaf 3
indicating tablet, and thus to CUT-OFF FOR ELECTRIC LAMPS, Fig. 2 isa transverse section of the piston; and Fig. 3 a convert theapparatusinto an automatic tell-tale, which would The present tendency in voltaic arc systems is to place section of the convex spring packing plate. not be without… … for use in horizontal cylinders, where, on account of the have an evil precedent established by means of it. © 1881 SCIENTIFIC AMERICIAN, INCInternet Archive · Public domain (published before 1931). Free to use for anything.
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