The Birmingham age-herald., 1912-11-03
TELEPHONE FROM
 TRAIN IN MOTION
Employees Can Communicate With Signalmen for the Purpose of
 Traffic Regulation
From . consular Report.

From a Consular Report.
 Many efforts have been made to pro- vide for communication between trains
 in motion. The railophone, a device for this purpose was recently tested at Strat- described as consisting of a telephone transmitter and pair of receivers fixed in sound-proof telephone box in the guards van and connected with copper coils mounted in a wooden casing and suspended by iron brackets from the coach.
 The telephone currents produced by the voice of the operator create what is described as a magnetic field. This field induees-on the wireless prineiple-an electric current in a metallic conductor, which is buried in the earth by the side of the railway track, and connected with telephonic instruments fixed at stations Telephonic conversation i3 thus carried through the railophone just as through any ordinary telephone.
 When the instruments were made with this device there were no means of call ing up unless the operator was in at tendance. This defect has now been overcome by the introduction of a highly sensitive detector through the said oi which the electric impulses received on the train are picked up and ''relayed into sufficiently strong currents to ring bell. In the same way a station can bt rung up from moving train.
 It is claimed that with the railophone guard and signalman can communicate with each other, whether the train is in motion or at standstill. for the pur, pose of traffic regulation in case of ac. | cidents, or during fogs or snowstorms and that messages can be sent with east and accuracy to and from passengers. The new detector has been adapted for automatically stopping a train without the intervention of the guard oi driver By means of the apparatus pro vided on tho train and in the signal box a remarkable cycle of operations is carried out.
 When train enters the main sectior red lamp is lit in the signal box anf simultaneously bell is sounded Should the signal man fail to respond to thes. | signals in ten seconds the lever is pulled | automatically into he danger position ! rendering it impossible for the sectioi to admit second train while the first i. | still there. Until the train has left tn,
 section the clever remains electrically | locked
 Under all ordinary circumstances tn red lamp above mentioned is automat ically extinguished when the train. en ters the clearing section and greer 1 lamp is lit. The green lamp is als, | extinguished when the train finally leaVei
 the section. Meanwhile the train itsel can receive Instructions. In foggy wealth | CT, by the addition of q special fog-sig
 mailing attachment, the train can bt automatically pulled up.
 | It is also claimed that railophone mes sages cannot stray to other trains ant | that the system is not influenced by atmospheric disturbances The tests which were made at Stratfard- n-Avor included the sending of messages be tween a moving train by audible signal signalling to station from moving train, the stopping of train in motior and the stopping of a train after 1t had been allowed to enter particuler sec tion