. Electric railway journal . rginghorns. The switches are manufactured in single-pole units, eachunit consisting of a stationary and a movable casting. Inthe stationary casting there is a brass bearing. The movablecasting has an extended stem, part of which is machinedto fit this bearing, the remainder being squared off to re-ceive a bell crank or sheave wheel for operating severalswitches simultaneously. A high-voltage porcelain insu- Horn-type switches have been found particularly desirableby transmission companies for supplying loads as small as10 kw without using the more costly oil switch
. Electric railway journal . rginghorns. The switches are manufactured in single-pole units, eachunit consisting of a stationary and a movable casting. Inthe stationary casting there is a brass bearing. The movablecasting has an extended stem, part of which is machinedto fit this bearing, the remainder being squared off to re-ceive a bell crank or sheave wheel for operating severalswitches simultaneously. A high-voltage porcelain insu- Horn-type switches have been found particularly desirableby transmission companies for supplying loads as small as10 kw without using the more costly oil switch. This type ofapparatus has also been used in sectionalizing transmissionlines to insure continuity of service and for use as outdoorcut-outs on the high-tension side of substations. Air-breakswitches of this type can be placed in portable substationsas substitutes for automatic circuit-breakers. PNEUMATIC DOOR DEVICES The Consolidated Car-Heating Company has placed anew electro-pneumatic door device on the market within the. and Solenoid for Operating Pneumatic Valve for Door last year. While the device proper operates by compressedair the valve is controlled electrically, there being a solenoidfor operating the valve in either direction. The valve isbuilt on the latest approved electrical lines and is entirelyiron-armored and arranged for conduit connections, so thatit can be placed in an exposed position in the car if desired. Instead of using pressure air for checking the motionof the door at the end of its travel atmospheric air is used,and a separate cylinder is provided for compressing it bythe motion of the door. This prevents the slamming of the
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Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyorkmcgrawhillp
