. Electrical world. FIG. 3.—CROSS-SECTION VIEW OF ELECTROMAGNET. equal weight, and a most desirable characteristic is obtained, in thatthe curve of tractive force is almost a horizontal line, which obvi-ates rapid acceleration of the plunger toward the end of the motion of the plunger is arrested simply by the action of the. FIG. 5.—GRAVITY MAGNETIC SWITCH. in rupturing any arc which may be formed. In closing, the switchshould act promptly and positively, and the current carrying con-tacts should be drawn together and held with sufficient pressure tocause intimate contact between th
. Electrical world. FIG. 3.—CROSS-SECTION VIEW OF ELECTROMAGNET. equal weight, and a most desirable characteristic is obtained, in thatthe curve of tractive force is almost a horizontal line, which obvi-ates rapid acceleration of the plunger toward the end of the motion of the plunger is arrested simply by the action of the. FIG. 5.—GRAVITY MAGNETIC SWITCH. in rupturing any arc which may be formed. In closing, the switchshould act promptly and positively, and the current carrying con-tacts should be drawn together and held with sufficient pressure tocause intimate contact between their surfaces. The switch illustrated June 1904. ELECTRICAL WORLD and ENGINEER. is claimed to possess all of the above characteristics together withother valuable features of its own. The switch is closed by the direct action of a vertical electro-magnet on a movable plunger which carries the contact arm of theswitch, and is opened by the action of gravity on the plunger andcontact arm, the weight of which is sufficient to produce instan-taneous separation of the contacts. The main contacts of the switch are of copper and are protected byauxiliary contacts of carbon so arranged that the final opening of thecircuit always takes place at the carbons, thus protecting the main
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectelectri, bookyear1883
