. Electric railway journal . nterlocking with the door. When enteringthe booth a party desiring to use the telephone must firstclose this switch and again he must open the switch as heleaves or the door of the booth cannot be closed. Allbooth telephones are without ringers and current is takenfrom the lighting system of the office building at MichiganCity to operate the dispatchers ringer. The switchboardat the dispatchers office has provisions for extra lines andis connected to the long-distance Bell lines. SIGNAL SYSTEM To assist the dispatcher in handling trains with the tele-phone the Tele
. Electric railway journal . nterlocking with the door. When enteringthe booth a party desiring to use the telephone must firstclose this switch and again he must open the switch as heleaves or the door of the booth cannot be closed. Allbooth telephones are without ringers and current is takenfrom the lighting system of the office building at MichiganCity to operate the dispatchers ringer. The switchboardat the dispatchers office has provisions for extra lines andis connected to the long-distance Bell lines. SIGNAL SYSTEM To assist the dispatcher in handling trains with the tele-phone the Telegraph Signal Companys system, made bythe Stromberg-Carlson Telephone Manufacturing Com-pany, of Rochester, N. Y., was installed. A system ofsynchronous clocks, one located at each meeting point, anda master clock in the dispatchers office, control the sema-phore blades along the road. Any one of these boards maybe thrown by the dispatcher. The semaphores indicate stopby a horizontal position of the arm by day and a red light. Chicago, Lake Shore & South Bend—Standard Motor Passenger Car phone line is on the same poles with the 33,000-volt trans-mission line and also with the 6600-volt trolley, extremecare was exercised in its construction. In addition to thetranspositions a i-to-i ratio transformer, insulated for30,000 volts and with a grounded core, was installed for by night in the usual manner. When a car is blocked bya semaphore the conductor proceeds to the phone, obtainshis order by the Egry register system and upon receivingan order from the dispatcher sets the signal again to safetyby pulling down a lever within the booth. April io, 1909.] ELECTRIC RAILWAY JOURNAL. 679 •The clocks are operated by weights and require windingabout once in 30 days. The signal circuit consists of twohard-drawn copper wires. This installation has given fullsatisfaction. CARS AND EQUIPMENT The rolling-stock equipment includes 24 large passengercars, one high-powered utility car, four smal
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