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Philly NRHS - Railfan Pictures of the Week


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The Philadelphia Chapter of the

National Railway Historical Society

Established in 1936


Railfan Pictures of the Week - 08/13/2006

SEPTA Main Line Carmel Interlocking Glenside PA June 18 2006

During the weekend of June 17 2006, SEPTA continued its cab-signaling march toward Lansdale with a reworking of Carmel Interlocking in Glenside PA. The pictures and the descriptions were provided by Matthew Mitchell of the Delaware Valley Association of Rail Passengers. Part One can be found here.

After igniting the thermite mixture, it is just a matter of time.....

before the aluminum really starts to burn .....
melting the iron oxide along with it, and gravity does the rest as the now white-hot molten metals flow from the thermite pot down into the mold below, with the excess captured in pans on either side.
Later, after the metal has cooled, the sand mold is broken and the equipment removed, the remaining flash around the joint is cut away and smoothed with a grinder.

All pictures June 18 2006 Copyright © 2006 Matthew Mitchell

Photographs for personal use only. All rights reserved by original owner of image. Reproduction or redistribution in any form without express written permission is prohibited.

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Last Updated August 13, 2006

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