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switch
switch

switch

Date1900-1930
Inventory Number1998-1-0683
ClassificationSwitch
Subject
    Maker American ?
    Cultural Region
      Dimensions3.2 x 5.7 x 7.6 cm (1 1/4 x 2 1/4 x 3 in.)
      Material
        DescriptionFour binding posts affixed to an insulating base, aligned in two sets of two. In the middle of these four posts is a large metallic circle with a metal lever attached to it that can be switched from one side of the base to the other, where they touch either one of two posts.
        Signedunsigned
        Inscribedengraved on top of switch knob: P
        FunctionUsed to close or break different parts of an electric circuit.
        key for resistance bridge
        key for resistance bridge
        Leeds & Northrup Company
        Date: mid 20th Century
        Object number: 1998-1-0607
        switch part
        switch part
        American
        Date: late 19th-early 20th Century
        Object number: 1998-1-0684
        reversing switch with mercury contacts for bridge work, D.P.D.T.
        reversing switch with mercury contacts for bridge work, D.P.D.T.
        American
        Date: late 19th-early 20th Century
        Accessories: tilting arm (0380b)
        Object number: 0380a
        tilting arm with six contacts for reversing switch
        tilting arm with six contacts for reversing switch
        American
        Date: late 19th-early 20th Century
        Accessories: goes with reversing switch (0380a)
        Object number: 0380b
        switch part
        switch part
        American
        Date: late 19th-early 20th Century
        Object number: 1998-1-0687
        bridge key for battery and galvanometer circuits
        bridge key for battery and galvanometer circuits
        American
        Date: late 19th-early 20th Century
        Object number: 0391
        reversing switch, D.P.D.T.
        reversing switch, D.P.D.T.
        American
        Date: late 19th-early 20th Century
        Object number: 0378
        rotating reversing switch, D.P.D.T.
        rotating reversing switch, D.P.D.T.
        American
        Date: late 19th-early 20th Century
        Object number: 0381
        bridge key with dual key for battery and galvonometer circuits
        bridge key with dual key for battery and galvonometer circuits
        Morris E. Leeds & Company
        Date: 1899-1903
        Object number: 0386
        switch part
        switch part
        American
        Date: early 20th-mid 20th Century
        Object number: 1998-1-0686
        single pull double throw knife switch
        single pull double throw knife switch
        American
        Date: early 20th-mid 20th Century
        Object number: WJ0952
        reversing switch, or electrepeter
        reversing switch, or electrepeter
        Daniel Davis, Jr.
        Date: circa 1842
        Object number: 0137