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portable wheatstone box bridge
portable wheatstone box bridge

portable wheatstone box bridge

Datecirca 1890
Inventory Number0490
ClassificationWheatstone Bridge
Subject
    Maker Western Electric Company 1869 - 1995
    Cultural Region
      Place of Origin
        Dimensions14.5 × 22.3 × 25.5 cm (5 11/16 × 8 3/4 × 10 1/16 in.)
        Material
          DescriptionWheatstone Box Bridge with self contained galvanometer indicator. Ratio arms A and B 10, 100 and 1000 ohms each. Plug resistors for units, tens, hundreds and thousands. Press keys for Bat and Gelo. Binding posts for unknown resistance and external bat.
          Signedmarked on plate on box lid: WESTERN ELECTRIC / COMPANY / CHICAGO & NEW YORK
          Curatorial RemarksDuring the B17 Dust Project the box could not be unlocked so the conservators only cleaned the outside.
          FunctionA Wheatstone bridge is an electrical circuit invented by Samuel Hunter Christie in 1833 and improved and popularized by Sir Charles Wheatstone in 1843. [1] It is used to measure an unknown electrical resistance by balancing two legs of a bridge circuit, one leg of which includes the unknown component. Its operation is similar to the original potentiometer.

          This information was taken from the following website.

          For other examples of such an instrument, go to the following website.
          plug Wheatstone bridge
          plug Wheatstone bridge
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          Accessories: lid
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          dial Wheatstone bridge (?)
          dial Wheatstone bridge (?)
          Leeds & Northrup Company
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          dial Wheatstone bridge (?)
          dial Wheatstone bridge (?)
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          Accessories: Mahogany Lid
          Object number: 1997-1-1988
          Wheatstone bridge
          Wheatstone bridge
          Leeds & Northrup Company
          Date: circa 1920
          Object number: 1997-1-1189
          Wheatstone bridge
          Wheatstone bridge
          Leeds & Northrup Company
          Date: circa 1910
          Object number: 1997-1-0780
          Anthony-Pattern Wheatstone bridge
          Anthony-Pattern Wheatstone bridge
          Leeds & Northrup Company
          Accessories: Directions booklet
          Object number: 1997-1-0218
          Wheatstone bridge
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          James W. Queen & Company
          Date: circa 1913
          Object number: 1997-1-0115
          Wheatstone box bridge
          Wheatstone box bridge
          Queen & Company
          Date: 1903
          Object number: 1997-1-0107
          Wheatstone box bridge
          Wheatstone box bridge
          Queen & Company
          Date: circa 1910
          Object number: 1997-1-1091
          Wheatstone slide-wire bridge
          Wheatstone slide-wire bridge
          Leeds & Northrup Company
          Object number: 1997-1-2224