bridge testing switch
Datelate 19th-early 20th Century
Inventory Number0283
ClassificationSwitch
Subject
Maker
Leeds & Northrup Company
1903 - 1995
User
Harvard Engineering School
1918 - 1951
Cultural Region
Place of Origin
Place of Use
Dimensions7.4 × 27 × 18 cm (2 15/16 × 10 5/8 × 7 1/16 in.)
Material
Accessories
DescriptionSliding contact switch. Double pull, double throw switch (DPDT switch) with heavy contacts. Assorted connecting leads attached. Mounted on rectangular wooden base. Leveling screws missing.
Signedbase plaque engraved: THE LEEDS AND NORTHRUP CO. / SCIENTIFIC INSTRUMENTS PHILADELPHIA. 7312;
another base plaque engraved: HARVARD UNIVERSITY / 465
Curatorial RemarksLeveling screw missing. Was first incorrectly catalogued as 1997-1-0229, so slide will have that number.
FunctionUsed to create and break an electrical circuit.
ProvenanceFrom the Harvard University Engineering School. Removed to this collection November 1956.
Morris E. Leeds & Company
Date: 1899-1903
Object number: 0386
Leach Relay Company
Date: 1890-1930
Object number: RS0531
Date: 1890-1930
Object number: RS0505
American
Date: late 19th-early 20th Century
Accessories: tilting arm (0380b)
Object number: 0380a
Date: 1890-1930
Object number: RS0501
Date: late 19th-early 20th Century
Object number: 0379
American
Date: late 19th-early 20th Century
Accessories: goes with reversing switch (0380a)
Object number: 0380b
