COPY.
581
Double Trolley System. Electric railways have led to many controversies between telephone and railway companies, and many devices have been proposed as a means of preventing or removing the difficulty. The most important of the plans for preventing the interference are: 1st. Change of the railway system to double trolley, or complete metallic circuit without ground connection. Undoubtedly, the use of the double trolley system would prevent any material disturbance to the telephone, as there is no connection of the railway circuit with the earth, except by accident, and the two wires run side by side and near together, thus avoiding any appreciable amount of induction. The leading railways constructing companies refuse to adapt the system, saying that it is not practicable except in very simple cases, and that in the case referred to, in Cincinnati, the road presents such simple conditions of engineering that for that reason only it is possible to operate the system successfully there.
Statutory Rules and Orders, 1895.
"These disturbances to the telephone from the tramway clauses.
Tramway and Light Railway, Ireland, quote two clauses.
(1.) The promoters shall construct their electric lines and other works of all descriptions, and shall work their undertaking in all respects with due regard to the telegraphic lines from time to time used or intended to be used by Her Majesty's Postmaster-General, and the currents in such telegraphic lines, and shall use every reasonable means in the construction of their electrical lines and other works of all descriptions, and the working of their undertaking, to prevent injurious affection, whether by induction or otherwise, to such telegraphic lines, or the currents therein. If any question arises as to whether the promoters have constructed their electric lines or other works, or work their undertaking in contravention of this sub-section, such question shall be determined by arbitration, and the promoters shall be bound to make any alterations in or additions to their system which may be directed by the arbitrator.
(5) For the purpose of this section, a telegraph line of the Postmaster-General shall be deemed to be injuriously affected by an act or work if the telegraphic communication by means of such line is, whether through induction or otherwise, in any manner affected by such act or work, or by any use made of such work.
Ir. Bake of the Indian Government Telegraphs on Disturbances from Electric Tramways. Proc. Inst. Elec. Engrs. May 1897.
The main point which may be of interest to many here, for I think it is rather a controversial matter, is that the Tramway Company had to reimburse the Eastern Extension Cable Companies for the cost of making this alteration.
The
1:
COPY.
581
Double Trolley System. electric railways have led to many controversies between telephone and railway companies and many devices have been proposed as a means of preventing or removing the difficulty. The most important of the plans for preventing the interference are:- 1st. Change of the railway system to double trolley, or complete metallic circuit without ground connec- tion. Undoubtedly, the use of the double trolley system would prevent any material disturbance to the telephone, as there is no connection of the railway circuit with the earth, except by accident, and the two wires run side by side and near together, thus avoiding any appreci- able amount of induction. The leading railways constructing companies refuse to adapt the system, saying that it is not practicable' except in very simple cases, and that in the case referred to, in Cincinnati the road presents such simple conditions of engineering that for that reasen only it is possible to operate the system successfully there.
Statutory Rules and Orders, 1895.
"These disturbances to the telephone from the
clauses.
Tramway and Light Railway, Ireland, quote two
(1.) The promoters shall construct their electric lines and other works of all descriptions, and shall work their undertaking in all respects with due regards to the telegraphic lines from time to time used or intended to be used by Her Majesty's Postmaster-General, and the currents in such telegraphic lines, and shall use every rea- sonable means in the construction of their electrical lines and other - works of all descriptions, and the working of their undertaking',
to prevent injurious affection, whether by induction or otherwise, to such telegraphic lines, or the currents therein. If any question arises as to whether the promoters have constructed their electric lines or other works, or work their undertaking in contravention of this sub-section, such question shall be detersined by arbitration, and the promoters shall be bound to make any alterations in or addi- tions to their system which may be directed by the arbitrator.
(5) For the purpose of this section a telegraph line of the Postmaster General shall be deemed to be injuriously affected
by an act or work if the telegraphic communication by means of such line is, whether through induction or otherwise, is any manner affected by such act or work.or by any use made of such work.
Ir. bake of the Indian Government Telegraphs on Disterbenoes from Electric Tramways. Proc. Inst. Blsc. Engrs. May 1897.
The main point which may be of interest to many here, for I think it is rather a centroversial matter, is that the Tramay Company had to reimburse the Eastern Extension Gable Companies for the sost of waking this alteration.
The
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