milliammeter Milliammeter
Inventory Number2012-1-0049
ClassificationAmmeter
Subject
Maker
Rawson Electrical Instrument Company
1918 - 1968
Cultural Region
Place of Origin
Place of Use
Dimensions8.1 × 17.7 × 17.9 cm (3 3/16 × 6 15/16 × 7 1/16 in.)
Material
Signedprinted on face of meter: MILLIAMPERES / RAWSON ELECTRICAL INSTRUMENT CO., INC. / CAMBRIDGE, MASS.
FunctionA sensitive ammeter for detecting small currents, graduated in milliamperes.
Jewell Electrical Instrument Company
Date: circa 1931
Accessories: inside lid is a standardization certificate from Oct. 16, 1931.
Object number: 1997-1-0334
Marion Electrical Instrument Company
Date: 1937-1959
Accessories: original cardboard box
Object number: WJ1265
Weston Electrical Instrument Corporation
Date: circa 1929
Accessories: lid of box can be removed; small paper tag loose inside box with assembly & inspection info; standardization certificate (1929) on inside of lid
Object number: 2003-1-0039
Weston Electrical Instrument Corporation
Date: circa 1924
Accessories: standardization certificate from Jan 7, 1924 inside lid
Object number: 1997-1-1055
Weston Electrical Instrument Corporation
Date: 1890-1900
Object number: 0418
Weston Electrical Instrument Corporation
Date: circa 1911
Object number: 0525
Weston Electrical Instrument Corporation
Date: 1890-1900
Accessories: shunt apparatus (0417b)
Object number: 0417a
Weston Electrical Instrument Corporation
Date: 1930-1960
Accessories: original cardboard box
Object number: WJ1269
Weston Electrical Instrument Corporation
Date: 1930-1960
Accessories: cardboard box (unknown if original)
Object number: WJ1270