. Electrical world. ection. The plug boardis covered by hea\^ belt leather stained to match the the front of the board and immediately under the key shelf aremounted the necessary night alarm and power generator switches,which are of the locking plunger type with the buttons almost flushwith the woodwork. The hand generator is mounted in the backof the cabinet on a substantial shelf which serves the triple purposeof a mounting for the generator, the cord terminals and that of add-ing strength and rigidity to the frame. February 6, igo4. ELECTRICAL WORLD and ENGINEER. The combined
. Electrical world. ection. The plug boardis covered by hea\^ belt leather stained to match the the front of the board and immediately under the key shelf aremounted the necessary night alarm and power generator switches,which are of the locking plunger type with the buttons almost flushwith the woodwork. The hand generator is mounted in the backof the cabinet on a substantial shelf which serves the triple purposeof a mounting for the generator, the cord terminals and that of add-ing strength and rigidity to the frame. February 6, igo4. ELECTRICAL WORLD and ENGINEER. The combined drops and jacks are mounted in strips of five onstrong steel plates, as shown in Fig. 2. These supporting strips inturn are securely fastened to a well-constructed steel frame bymeans of heavy machine screws which are covered by wooden stilestrips stained and finished to match the cabinet. A side view of the drop and jack is shown in Fig. 3. The dropshutter is mounted on the front of the steel mounting plate and the. FIG. 2.—STRIP OF DROPS AND JACKS. back plate of the shutter has part of the stock formed out at thebottom to provide a positive stop for the shutter to prevent its fallingfar enough to cover the jack. The drop is of the non-inductive tubular type and is mounted onthe base of the jack by means of two screws. The jack springs are ofthe best grade of German silver and are made of very heavy the front they are brought strongly against an insulated stoppin which makes it possible to give them a heavy tension in theirnormal position and insures a positive plug contact at all times withbut the slightest displacement, or bending, of the springs. The jacksprings are mounted on the brass cast base and are firmly clampedby heavy machine screws and properly formed washers. The insu-lation is of mica. The combined drop and jack are mounted on thesteel strip by the use of a threaded jack ferrule which passesthrough the strip from the front of the board into the end
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectelectri, bookyear1883
