D.C. milliammeter, 0-50
Date1930-1950
Inventory NumberWJ1268
ClassificationAmmeter
Subject
Maker
General Electric Company
1892-present
Associate Name(contractor)
United States Navy
founded 1775
User
Psycho-Acoustic Laboratory, Harvard University
?
1940 - 1962
User
Department of Psychology, Harvard University
founded 1934
User
Department of Social Relations, Harvard University
1946 - 1972
Cultural Region
Place of Origin
Place of Use
Dimensionsbox: 7.8 × 8.8 × 8.8 cm (3 1/16 × 3 7/16 × 3 7/16 in.)
6.5 × 6.5 × 6 cm (2 9/16 × 2 9/16 × 2 3/8 in.)
6.5 × 6.5 × 6 cm (2 9/16 × 2 9/16 × 2 3/8 in.)
Material
AccessoriesPaper envelope with printed lettering: P-4142407 Gr.2, containing assorted screws, nuts, & washers, within box beneath object.
DescriptionSmall bakelite round D.C. milliammeter with anti-glare glass (type DW-41, Model 8DW41) in original cardboard packaging. The dial is calibrated from 0 to 50, with 5 smaller intervals between each number that are each marked with a line.
Signedon dial of meter: D-C. MILLIAMPERES/GENERAL ELECTRIC/U.S.N. TYPE CG-22057/TYPE DW 41/MODEL 8DW41/N.P.60984/MADE IN U.S.A.
Inscribedon top of box: Contract No. NXss-15910/1 Milliammeter/340,344/Navy Type No. -22057/G.E. Ref. P-7761557-P1/General Electric Co./Bridgeport, Conn./4
on side of box: GENERAL ELECTRIC/MINATURE INSTRUMENT/TYPE 8DW/MODEL 41ADR14/RATING 50 MA DC/REQ. BPWR 19826/REMARKS X [?]/SCHENECTADY, N.Y./NP-97629 MADE IN USA
Curatorial RemarksThe GE Bridgeport plant was acquired by GE after World War II.
Probably used in the Psycho-Acoustic Laboratory. See inscriptions on instrument WJ1288.
ProvenanceFrom William James Hall, Harvard University.
General Electric Company
Date: 1945-1960
Accessories: cardboard box
small folded paper envelope inside box marked P-4142407 Gr 2, containing three(3) 2cm flathead screws, four(4) 1cm nuts, three(3) .5cm nuts, four(4) .75cm washers, two(2).6cm washers, three(3).3cm washers
Object number: WJ1264
General Electric Company
Date: 1930-1950
Accessories: Small paper envelope containing assorted screws, nuts, & washers within box, beneath ammeter.
Object number: WJ1267
General Electric Company
Date: 1945-1960
Accessories: original cardboard box; small sealed envelope of hardware
Object number: WJ1297
American
Date: 1900-1950
Accessories: clamp; screws (4); wingnut (1); washers (6); nuts (3)
Object number: 1996-1-0266
American
Date: 1900-1950
Accessories: clamp; screws (4); wingnut (1); washers (6); nuts (3)
Object number: 1996-1-0267
Weston Electrical Instrument Corporation
Accessories: small attached bag in back with screws, nuts and washers.
Object number: WJ0377
Accessories: Parts: scale, 6 gears (four "spare change gears" stored on holder, two taken from "Driven Gear" locations) and two nuts that hold gears in place, one roll of paper, metal plate "SYNCHRONOUS CHART DRIVE OPERATING INSTRUCTIONS", one metal identification plate with 0 adjustment scale.
Object number: 2009-1-0057
Triplett
Date: 1930-1960
Accessories: cardboard box (not original, WESTON)
Object number: WJ1266
Marion Electrical Instrument Company
Date: 1937-1959
Accessories: original cardboard box
Object number: WJ1265
General Electric Company
Date: 1945-1960
Accessories: cardboard box; small sealed envelope of hardware
Object number: WJ1281
Weston Electrical Instrument Corporation
Date: circa 1921
Accessories: petri dish (1997-1-1059b) containing three loose binding posts, short lengths of wires, and an array of small mismatched screws, bolts, and washers
Object number: 1997-1-1059a,b
General Electric Company
Date: 1945-1960
Accessories: plain cardboard box (with inscriptions)
Object number: WJ1262
See also/See also
