Mechanics of the household; a course of study devoted to domestic machinery and household mechanical appliances . (^) (d) Fig. 272.—Wall and ceiling sockets. Fig. 269,a is composed of a 30-ampere porcelain base with con-nections for plug fuses. Fig. 269,6 is a slate base with connections for cartridge fuses. 382 MECHANICS OF THE HOUSEHOLD Fig. 269,c is a slate base with connections for open-link fuses. Local Switches.—^Local wall switches may be selected from thevarious styles shown in Figs. 270,a, h, c, d and e. Fig. 270,a is the two-button flush type completely enclosed in abox of non-breaka
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Mechanics of the household; a course of study devoted to domestic machinery and household mechanical appliances . (^) (d) Fig. 272.—Wall and ceiling sockets. Fig. 269, a is composed of a 30-ampere porcelain base with con-nections for plug fuses. Fig. 269, 6 is a slate base with connections for cartridge fuses. 382 MECHANICS OF THE HOUSEHOLD Fig. 269, c is a slate base with connections for open-link fuses. Local Switches.—^Local wall switches may be selected from thevarious styles shown in Figs. 270, a, h, c, d and e. Fig. 270, a is the two-button flush type completely enclosed in abox of non-breakable insulating material with brass beveledcover plate finished to match surrounding hardware.. ^^ <^) (2) Fig. 273.—Drop-light attachments and lamp bases. Fig. 270, & is a two-button flush type with brass beveled-edgecover plate finished to match surrounding hardware. Fig. 270, c is of the removable-mechanism type with brass bev-eled-edge cover plate finished to match surrounding hardware. Fig. 270, d is the single-button flush type with brass beveled-edge cover plate finished to match surrounding hardware. Fig. 270, 6 is the rotary-flush type with brass beveled-edgecover plate finished to match surrounding hardware. ELECTRICITY 383 Pilot Lights.—Switches controlhng cellar, attic and porchlights may be either Fig. 270, a or b. Fig. 270, a requires for its installation a two-gang outlet box.The ruby bulPs-eye which covers the lamp is practically flush, extending from the wall no further than the buttons of theswitch. Fig. 270, & is installed in a single-gang box. The lamp ex-tends through the plate and is protected by a perforated cagewhich extends about an inch from t