RRSignal.com Photo Gallery

Featuring Union Switch & Signal equipment photos
No touchups - No watermarks - Enjoy!
Fixed SQL errors - More photos coming in 2022


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Relay room at 13th St. Interlocking showing plug-in relays, RPQ rectifiers, and ground detector apparatus, Chicago Subway, CRT83 views
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Rear of Relay Rack in Relay Room 13th St. Interlocking, Chicago Subway, CRT74 views
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G.E. Transformers, power panel, RPQ-41 rectifiers, and relay panel in signal room AB-94 on continuous platform near Jackson, Chicago Subway, CRT78 views
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Relays, transformers, & RPQ-41 rectifiers in signal room AB 94 on continuous platform near Jackson, Chicago Subway, CRT76 views
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Plug-in relays in relay room - North Portal Interlocking - Chicago Subway and Elevated, C.R.T.81 views
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High C.T.C. System Relay Racks79 views
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High C.T.C. System Relay Racks72 views
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High C.T.C. System Relay Racks68 views
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Plug-in Relay Racks - Roanoke Interlocking - N&W R.R. (front view)71 views
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Plug-in Relay Racks - Roanoke Interlocking - N&W R.R. (back view)70 views
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Factory wired rack for Plug-in Relays (all relays in place)71 views
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Back view of factory wired relay rack69 views
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Wiring chase on back of relay rack68 views
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Test set-up of Illinois Central R.R. - Markem Yard Control machines and Relay racks and etc. in Department 5889 views
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Section of test set-up of Markem Yard equipment67 views
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Illinois Central R.R. - Markem Yard - left hand side of test set-up69 views
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Close-up view of part of rack for Markem Yard showing wiring - Illinois Central R.R.74 views
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I.C. R.R. - Markem Yard Test set-up - Test Panel, Relays, and etc.68 views
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Close-up of Plug-in Relays - Markem Yard - Illinois Central R.R.82 views
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Montreal Installation Office Code Rack69 views516A Multiplex Code Control System
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Montreal Installation Field Coding Rack65 views516A Multiplex Code Control System
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Montreal Installation Office Coding Unit (front view)75 views516A Multiplex Code Control System
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Montreal Installation Office Coding Unit (back view)71 views516A Multiplex Code Control System
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Montreal Installation Chain Unit (front view)64 views516A Multiplex Code Control System
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Montreal Installation Chain Unit (back view)63 views516A Multiplex Code Control System
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Montreal Installation Field Coding Unit (front view)67 views516A Multiplex Code Control System
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Montreal Installation Field Coding Unit (back view)71 views516A Multiplex Code Control System
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Coded Carrier Case72 views
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Russian Relay Case71 views
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Montreal Relay Racks - Can. Natl. R.R.65 views
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Montreal Relay Racks - Can. Natl. R.R.60 views
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Montreal Relay Racks - Can. Natl. R.R.62 views
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