. Electrical world. and per-manency of adjustment. Improvements in Sign Flashers. It is frequently the case that electrical apparatus has to gothrough a considerable evolution before being reduced to its simplest form. This seems to have been the case with sign flashers. An im-provement in the direction of simplicity and more satisfactory oper-ation has recently been made in the design of the electric signflashers made by the Reynolds Electric Flasher Manufacturing Com-pany, of Chicago. As flashers were formerly made, each make-and-break switch was operated by a cam or segment bolted to a whee
. Electrical world. and per-manency of adjustment. Improvements in Sign Flashers. It is frequently the case that electrical apparatus has to gothrough a considerable evolution before being reduced to its simplest form. This seems to have been the case with sign flashers. An im-provement in the direction of simplicity and more satisfactory oper-ation has recently been made in the design of the electric signflashers made by the Reynolds Electric Flasher Manufacturing Com-pany, of Chicago. As flashers were formerly made, each make-and-break switch was operated by a cam or segment bolted to a were as many of these wheels with cams as there were make-and-break switches on the flasher. The new design does away with these cams and substitutes asegment of a sheet steel cylinder, which is notched or slotted so asto give the proper combination. This construction is especiallyan advantage where a number of circuits are to be flashed simul-taneously. With the cams it was found difficult to adjust them so. SIGN FLASHER. they would snap all the switches at exactly the same instant, and theresult was a ragged effect on the sign. With the sheet steel it issimply necessary to provide a straight edge in order to have theswitches operate simultaneously. If they are not to be operatedsimultaneously, the edge is notched. The accompanying illustrationshows a flasher which is adapted to flash two views of a sign alter-nately, the circuits on each half being all lighted and extinguishedat the same instant. Another advantage of this construction is thatthere need not be a wheel on the shaft for each switch. It is onlynecessary to have enough wheels to support the stiff sheet steelsegment. Metal Melting Furnace. We illustrate herewith the Lunkenheimer metal melting furnace,which has been found to afford a very efficient and economicalmethod of melting metals, particularly brasses and bronzes. As will
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectelectri, bookyear1883
