. Electrical world. FIG. I.—FACE PLATE. FIG. 3-—PLUG AND RECEPTACLE COMPLETE. plug. In the Diamond H receptacle and plug, the shutter for theopening in the face plate is automatically operated by the plug itself—one hand, only, being required. These receptacles are made in gangs of any number, or are putin gangs with the Diamond H push button or rotary flushswitches, and will fit the usual wall appliances designed for these. FIG. 2.—RECEPTACLE AND PLUG. switches. Fig. i is a cut of the face plate, plug removed; Fig. 2shows the plug in a position for entering the face plate; Fig. 3shows the plu
. Electrical world. FIG. I.—FACE PLATE. FIG. 3-—PLUG AND RECEPTACLE COMPLETE. plug. In the Diamond H receptacle and plug, the shutter for theopening in the face plate is automatically operated by the plug itself—one hand, only, being required. These receptacles are made in gangs of any number, or are putin gangs with the Diamond H push button or rotary flushswitches, and will fit the usual wall appliances designed for these. FIG. 2.—RECEPTACLE AND PLUG. switches. Fig. i is a cut of the face plate, plug removed; Fig. 2shows the plug in a position for entering the face plate; Fig. 3shows the plug and receptacle complete. The device is manufactured by The Hart Manufacturing Com-pany, Hartford, Conn, manufacturers of switches bearing the samedesignation. Variable Speed Too Drive Motors. In order to meet the demand for variable speed in motors for tooldriving, the Commercial Electric Company of Indianapolis, Ind.,have brought out a line of Commercial variable speed motorsspecially designed to meet the problems connected with the sub-ject. In these machines herewith illustrated (Fig. i), the varia-tion of speed is accomplished by means of a double commutatorarmature, having two different windings; but each winding is ofthe same size conductor or of the same ampere capacity. A rangein speed is secured of four to one, in twelve uniformly graded stepswithout overlapping. A speed controller is furnished for makin
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectelectri, bookyear1883
