telegraph relay
Date1900-1930
Inventory Number1997-1-0624
ClassificationTelegraph Relay
Subject
Maker
American
Cultural Region
Dimensions6.4 × 20.5 × 8.9 cm (2 1/2 × 8 1/16 × 3 1/2 in.)
Material
DescriptionRelay mounted on a wooden, rectangular base. Eight binding posts form a u-shape around the front of the base. A wire connects each binding post to the front face of a cylinder that extends to the back of the base. The front face is red with several holes in it -- a large hole on the left side and two smaller holes on the right. Several metal bars extend out of the large hole on the left, and a single bar extends out of each of the two holes on the right. The body of the cylinder is black. To the right of the cylinder is an inscription that reads, "Standard 68 - A Shelf No.," with an electrical diagram below.
Signedunsigned
FunctionTelegraphic relays could be used to control the current flow between other telegraphic instruments and switchboards.
U.S. Electrical Supplies
Date: 1910-1920
Object number: 1997-1-0578
