milliammeter
Inventory Number2012-1-0019
ClassificationAmmeter
Subject
Maker
Robert W. Paul Instrument Company
1891 - 1919
Repaired by
Rawson Electrical Instrument Company
1918 - 1968
Cultural Region
Place of Origin
Place of Use
Dimensions8.5 × 21.5 × 20.5 cm (3 3/8 × 8 7/16 × 8 1/16 in.)
Material
DescriptionSquare wooden case, lid and handle missing.
Square black metal textured front panel with fan-shaped window with arched scale with mirror strip. Knife edged a pointer with a hollow circle near its end hovering over a reflective band.
Non-linear scale 0-5 milliamperes with bigger intervals as it goes up.
2 metal topped electrical connectors and bakelite knob.
Raised disc with dial labeled "CLAMP FOR TRANSIT DEPRESS ↓AND TURN"
Square black metal textured front panel with fan-shaped window with arched scale with mirror strip. Knife edged a pointer with a hollow circle near its end hovering over a reflective band.
Non-linear scale 0-5 milliamperes with bigger intervals as it goes up.
2 metal topped electrical connectors and bakelite knob.
Raised disc with dial labeled "CLAMP FOR TRANSIT DEPRESS ↓AND TURN"
Signedprinted on face of meter: MILLIAMPERES / REPAIRED BY / RAWSON ELECTRICAL INSTRUMENT CO. / CAMBRIDGE, MASS.
FunctionA milliammeter is a meter that measures the flow of electrical current in milliamperes.
Weston Electrical Instrument Corporation
Date: circa 1924
Accessories: standardization certificate from Jan 7, 1924 inside lid
Object number: 1997-1-1055
Jewell Electrical Instrument Company
Date: circa 1931
Accessories: inside lid is a standardization certificate from Oct. 16, 1931.
Object number: 1997-1-0334
Weston Electrical Instrument Corporation
Date: 1901-1930
Accessories: standardization certificate on inner surface of lid
Object number: 2003-1-0038
Weston Electrical Instrument Corporation
Date: circa 1911
Object number: 0525