Object Record

  • Email This Page
  • Send Feedback
Accession number 1996.4
Object ID 1996.4.8
Object Name Relay
Collection Object/Artifact Collection
Date ca. 1920
Description Box-shaped, Track Relay with cast iron body and a cylindrical motor housing; black plastic tape with raised white letters inscribed "3 TRACK RELAY"; General Railway Signal Co.; circa 1920s; NYCT inspector's tag dated 8/30/88. Connects subway signals with the tracks sections they control. It detects oncoming trains & automatically changes signal lights. Relays also send train location & switch positions to the signal tower, enabling the tower operator to control some of the signals.
Box-shaped, cast iron case and cylindrical motor housing; one glass pane at front; visible electrical components include coils and magnetic contacts; black bakelite contact board with twenty-four contacts; each contact is comprised of a threaded brass bolt, copper washers and a white plastic disc, inscribed with the contact number; insulated cut wires attached to some contacts; three copper spring feet; painted black.
Manufacturer General Railway Signal Co.
Maker General Railway Signal Co.
Maker's Role Manufacturer
Place of Origin Rochester, NY
Dimension Details 10 1/2-in. OH x 9-in. OW x 12 1/2-in. OD
Material Cast iron/Bakelite/Glass/Copper
People/Corporations General Railway Signal Co.
Subjects Subways--New York (State)--New York--History.
Subways--Electric equipment--New York (State)--New York.
Search Terms Relay, Track
Number of images 1.0