New combination use of radio with loudspeakers installed in Kansas Avenue yard at Springfield, Mo; each car inspector is equipped with light weight portable radio transmitter set for reporting defects; such messages are reproduced over yard loudspeakers for others concerned in operation; inspector can also transmit warning if he is working on car or between cars. (see also Ry Signaling and Communications v 46 n 2 Mar 1953 p 192-3)
Frisco's radio-loudspeaker system allows faster car inspection
Ry Age
Railway Age ; 134 , n 8 ; p 47-48
1953
2 pages
Article (Journal)
English
© Metadata Copyright Elsevier B. V. All rights reserved.
Overhead feed allows faster fueling
Engineering Index Backfile | 1928
|Department highlights - New technology allows much faster onboard data transfer
Online Contents | 2006
Loudspeaker system, loudspeaker system component, and audio system
European Patent Office | 2021
|Loudspeaker mounting frame, loudspeaker and loudspeaker cabinet
European Patent Office | 2019
|LOUDSPEAKER SYSTEM, LOUDSPEAKER SYSTEM COMPONENT, AND AUDIO SYSTEM
European Patent Office | 2020
|