General Information

Serial #

SS 2694

Part Number

1

Total Parts

1

AKA

N/A

Patents

N/A

General Description

CAST-IRON, STEEL, COPPER, AND POSSIBLY OTHER METAL MATERIALS OF CONSTRUCTION. MOUNTED ON WOODEN BASE. SYNTHETIC KNOBS AND OTHER MINOR FITTINGS.

Dimensions

Note: These reflect the general size for storage and are not necessarily representative of the object's true dimensions.

Length

19.0 cm

Width

11.3 cm

Height

11.5 cm

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Energy-electric

Category

Regulation & transformation

Sub-Category

N/A

Manufacturer

AKA

PIONEER

Country

United States of America

State/Province

Illinois

City

Chicago

Context

Country

United States of America

State/Province

Unknown

Period

THIS TYPE OF DYNAMOTOR USED C. 1940S.

Canada

Unknown

Function

TO CONVERT AC TO DC POWER.

Technical

DURING 1940-41 GENERAL ELECTRIC DEVELOPED MORE FRACTIONAL- HORSEPOWER MOTORS FOR THE USE OF THE U.S. ARMY THAN IN ANY PREVIOUS YEAR. THEY STATED THAT "SINCE MODERN WAR IS MECHANIZED WAR, IT FOLLOWS THAT INNUMERABLE SHAPES AND TYPES OF SMALL MOTORS ARE REQUIRED TO OPERATE AND CONTROL THE MECHANIZED EQUIPMENT." TO FURTHER FACILITATE THE USE OF DC/AC DEVICES A VARIETY OF DYNAMOTORS, A ROTATING ELECTRICAL MACHINE WITH TWO OR MORE WINDINGS ON A SINGLE ARMATURE CONTAINING A COMMUTATOR FOR DC OPERATION AND SLIP RINGS FOR AC OPERATION, HAD BEEN DEVELOPED. (REF 1)

Area Notes

Unknown

Details

Markings

Plate secured to dynamotor casing reads "Pioneer Gen-E-Motor/ MADE IN CHICAGO, ILL. U.S.A./ DYNAMOTOR/ INPUT VOLTS 9 SS 2694/ OUTPUT VOLTS 450". "5", "U[anchor symbol]S" and "B10535" stencilled in white on casing. "AGR 5003" incised, below. "A.G.R." stencilled in yellow on mounting stand. "PIONEER GEN-E-MOTOR PART C-9975-1" cast in raised print on endpieces.

Missing

UNKNOWN.

Finish

FINELY WRINKLE-TEXTURED BLACK ENAMEL FINISH ON CENTRAL PORTION AND BASE; SILVER METAL ENDPIECES. UNFINISHED WOOD BASE. BLACK SYNTHETIC KNOBS SECURE BRUSHES.

Decoration

N/A