. The Bell System technical journal . Fig. 13—Equipment in unattended repeater station. reaches 95 degrees. Each new unattended repeater station is equippedwith a 4 kw. heater similarly controlled, and, on account of the heatdissipation of power plant and vacuum tubes, also has forced ventila-tion which is operative under conditions of high temperature. Thesystem of forced ventilation consists of spun glass intake filter, exhaustfan, electric solenoid controlled shutters at intake and exhaust, andthermostat, and is interconnected with the office alarms to prevent fanoperation in case of fire.
. The Bell System technical journal . Fig. 13—Equipment in unattended repeater station. reaches 95 degrees. Each new unattended repeater station is equippedwith a 4 kw. heater similarly controlled, and, on account of the heatdissipation of power plant and vacuum tubes, also has forced ventila-tion which is operative under conditions of high temperature. Thesystem of forced ventilation consists of spun glass intake filter, exhaustfan, electric solenoid controlled shutters at intake and exhaust, andthermostat, and is interconnected with the office alarms to prevent fanoperation in case of fire. SOME APPLICATIONS OF TYPE 7 CARRIER SYSTEM 359. a T3 C T 360 BELL SYSTEM TECHNICAL JOURNAL
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Keywords: ., bookcentury1900, bookdecade1920, booksubjecttechnology, bookyear1
