. Electrical world. magnetic field, which gives rise to the designation Magnetic Cush-ion. No mechanical stop is provided and there is no blow or shockwhen the plunger is brought to rest at the end of its travel. Themagnet plunger, therefore, is silent in operation. For operation inexposed places, the winding of the magnet is completely enclosed. FIG. 2.—LIFTING M.\CXi:r FIG. 4.—GENERAL VIEW OF ELECTROMAGNET. handle five tons in the form of an ingot might not handle fivehundred pounds in the form of thin plates. The company has securedcomplete lines of data through the testing of some forty de
. Electrical world. magnetic field, which gives rise to the designation Magnetic Cush-ion. No mechanical stop is provided and there is no blow or shockwhen the plunger is brought to rest at the end of its travel. Themagnet plunger, therefore, is silent in operation. For operation inexposed places, the winding of the magnet is completely enclosed. FIG. 2.—LIFTING M.\CXi:r FIG. 4.—GENERAL VIEW OF ELECTROMAGNET. handle five tons in the form of an ingot might not handle fivehundred pounds in the form of thin plates. The company has securedcomplete lines of data through the testing of some forty designs ofmagnets on a testing machine constructed for this special Figs 3 and 4 are shown the magnetic cushion type of electro-magnet designed to overcome the objections to the employment ofthe usual type for lifting and other purposes. The initial pull ofthe magnet through the air gaps encountered in common practiceis fully equal to that of a plugged or stopped type of magnet of and protected by the ironclad construction of the return magneticcircuit. Fig. 5 shows a gravity type of magnetic switch, made in capacitiesfrom I to 150 amperes. In opening an electric switch circuit carry-ing a heavy current the switching device employed should meet thefollowing requirements: First, it should open instantaneously; sec-ond, its con
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectelectri, bookyear1883
