Electrical news and engineering . rd of the lamp signal type. The installation consists of a single position sectionof unit type cabinet to which additional sections may con-veniently be added from time to time as the system woodwork is of oak throughout provided with a dulllight oak finish which presents a very durable surface tothe constant wear and tear to which switchboards are ex-posed. The design of the cabinet .as shown in Fig. 1, isextremely plain and devoid of the usual dust-catchingmouldings and crevices. The entire rear panel of theswitchboard is made removable, which, tog
Electrical news and engineering . rd of the lamp signal type. The installation consists of a single position sectionof unit type cabinet to which additional sections may con-veniently be added from time to time as the system woodwork is of oak throughout provided with a dulllight oak finish which presents a very durable surface tothe constant wear and tear to which switchboards are ex-posed. The design of the cabinet .as shown in Fig. 1, isextremely plain and devoid of the usual dust-catchingmouldings and crevices. The entire rear panel of theswitchboard is made removable, which, together with thehinged keyboard oiTers ready access to any part of theapparatus. The plugboard and pilot rail are inlaid withheavy leather to protect the woodwork against possible in-jury due to falling plugs. All of the lines, both local and rural, are terminatedone self-restoring drops of the unit removable type mount-ed in strips of five on steel mounting plates, three panelswide. The shutters of the line signals are of the seg-. Fig. 1 mental type e-xpojinn to view one curved and two plainsurfaces when tht line signal i> displayed, enabling (lieoperator to locate the source of the incoming call fromany view angle. The entire face of the switchboard is ofsteel construction with a Bauer liarfT finish which formsa striking contrast to the aluminum sand-blasted finish ofthe drop shutter in its call-announcing positiiii. The linejacks associated with each drop are of the donble ciil-olftype, provided with heavy ^cerinan-silver contact spriiiirs,heavily insulated from each other to insure against leaU- age and resulting cross talk. A unique relation Ijetweenthe aniiatiirc and the drop shutter insures its positive op-eration under most trying conditions. In fact it has beendemonstrated that the signals will operate satisfactorilywith the cabinet inclined backward to an angle of de-grees from the vertical. Telephone men will find the connecting cord pairequipments and their ci
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Keywords: ., bo, bookcentury1800, bookdecade1890, bookidelectricalnewsen20donm