Image / [J. J. De Moore, California Street Railway superintendent, displaying a device designed …

[J. J. De Moore, California Street Railway superintendent, displaying a device designed to detect damaged cable car cable]

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Title: [J. J. De Moore, California Street Railway superintendent, displaying a device designed to detect damaged cable car cable]
Date Created and/or Issued: 1947 Mar. 20
Contributing Institution: San Francisco Public Library
Collection: San Francisco Historical Photograph Collection
Rights Information: Permission to use this image must be obtained from the San Francisco History Center, San Francisco Public Library: www.sfpl.org/permissions.
Description: Folder: S.F. Transportation-Cable Cars-Powerhouse-Cables.
Permission to use this image must be obtained from the San Francisco History Center, San Francisco Public Library: www.sfpl.org/permissions.
On back: "ELECTRIC GUARDIAN--This simple little gadget, pointed out by J. J. De Moore, California Street Railway superintendent, gives warning if the cable has a broken wire. If even one of the 104 steel wires in the cable breaks, the frayed end touches the ring through which it passes and sets off an alarm. Then the cable has to be repaired with a 60-foot 'long splice' so skillfully done that the diameter of the cable is not changed at the splice.
Type: image
Extent: 1 photographic print:
Subject: Transportation--Cable Cars--Powerhouse-Cables
San Francisco (Calif.)--Photographs

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