. Electric railway journal . l ironsbuilt into the cell wallsand the single polesolenoid is mountedwith its mechanism ona plate and channelframe fastened on topof the cell. To en-able them to break thearc quickly the break-ers are provided withaccelerating air-cylinderdash-pots take up theshock of the movingparts at the full openposition. The moving contacts are of the high-voltage, high-capacitylaminated-brush type circuit-breaker mounted j i-i j. i j IN CELL and they are protected by butt-type arcing contacts of considerable size. Recently tests were made on one of these b
. Electric railway journal . l ironsbuilt into the cell wallsand the single polesolenoid is mountedwith its mechanism ona plate and channelframe fastened on topof the cell. To en-able them to break thearc quickly the break-ers are provided withaccelerating air-cylinderdash-pots take up theshock of the movingparts at the full openposition. The moving contacts are of the high-voltage, high-capacitylaminated-brush type circuit-breaker mounted j i-i j. i j IN CELL and they are protected by butt-type arcing contacts of considerable size. Recently tests were made on one of these breakers byshort-circuiting a 25,000-kva., 23,000-volt turbo-genera-tor, five tests being made without external reactance inthe circuit, five tests with 5 per cent 500-amp. reactancecoils and six tests by short-circuiting the line at a sub-station 8 miles distant, the circuit including about 3miles of cable. After the tests the breaker was openedfor inspection, and there was no evidence on the arcingtips of excessive 46 ELECTRIC RAILWAY JOURNAL [Vol. XLIX, No. 1 London Letter Topics Discussed Mostly Those Growing Out of theWar—Claygate Electrification Completed (From Our Regular Correspondent.) The Ashton-under-Lyne Corporation, in conjunction withthe Waterloo and the Bardsley Parish Councils, recentlytook the first definite step towards acquiring the tramwaysystem of the Oldham, Ashton & Hyde Electric Tramways,operated under private management for about twenty-fiveyears. The Ashton Council decided to promote in the nextsession of Parliament a bill to make provision in respectto the purchase of the undertaking. Agreements werealso confirmed with the Parish Councils of Waterloo andBardsley for the transfer of their powers to the Corpora-tion. The bill seeks to authorize the Corporation to con-struct additional tramways in the borough and to provideand run omnibuses. In the event of the bill being passed,it is. hoped to establish through inter-running between Ash-ton a
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