SHORPY Historic Photo Archive & Fine-Art Prints
The Shorpy Archive
6000+ fine-art prints suitable for framing. Desk-size to sofa-size and larger, on archival paper or canvas.
Join and Share

Social Shorpy

Syndicate content
Syndicate content
Syndicate content
Daily e-mail updates:


Member Photos

Photos submitted by Shorpy members.

Colorized Photos

Colorized photos submitted by members.

About the Photos

Our holdings include hundreds of glass and film negatives/transparencies that we've scanned ourselves; in addition, many other photos on this site were extracted from reference images (high-resolution tiffs) in the Library of Congress research archive. (To query the database click here.) They are adjusted, restored and reworked by your webmaster in accordance with his aesthetic sensibilities before being downsized and turned into the jpegs you see here. All of these images (including "derivative works") are protected by copyright laws of the United States and other jurisdictions and may not be sold, reproduced or otherwise used for commercial purposes without permission.

© 2018 SHORPY INC.

[REV 25-NOV-2014]

JUMP TO PAGE   100  >  200  >  300  >  400  >  500  >  600

More Union Station: 1908

More Union Station: 1908

Washington, D.C., c. 1908-1910. "Switch yards, Union Station." Lefthand section of our railyard panorama. Detroit Publishing glass negative. View full size.

On Shorpy:
Today's Top 5

Double Slip Switch

That type of switch is called a double slip switch, a maintenance nightmare to do repair work on. It looks simple, but it's quite complicated in mechanical and electrical set up & controls for the signals as well.

It's possible to travel over it as if it was a simple "X," but also to enter one leg of the X and leave via the other leg that is on the same side. A very clever piece of trackwork. When the foreground train has departed, the one in the back can advance to the double slip and be switched to either the same track as the departed train, or to the adjacent track, behind the walking man.

Coming & Going

The adjacent track switch seems to be four-way, as to which two directions it joins. It's sort of a Rubik's cube to set, I bet.

SHORPY HISTORICAL PHOTO ARCHIVE | History in HD is a vintage photo archive featuring thousands of high-definition images from the 1850s to 1960s. (Available as fine-art prints from the Shorpy Archive.) The site is named after Shorpy Higginbotham, a teenage coal miner who lived 100 years ago.

Syndicate content RSS | Contact Us | Privacy Policy | Photo Use | © 2018 Shorpy Inc.