General Information

Serial #

41450

Part Number

1

Total Parts

1

AKA

N/A

Patents

N/A

General Description

WOODEN BENCH (STAND) TO MOUNT COMPONENTS. CAST IRON BASE & END BELLS. STEEL MOTOR GENERATOR CASE. COMMON SHAFT & ARMATURE CORE OF LAMINATED STEEL. LAMINATED STEEL ROTOR; LAMINATED STEEL & COPPER FIELD, STATOR & ARMATURE. WINDINGS ARE INSULATED COPPER WIRE. COMMUTATOR IS COPPER WITH MICA INSULATION. CARBON BRUSHES; BAKELITE & ALUMINUM BRUSH HOLDERS; CAST STEEL BRUSH HOLDER MOUNT. BRONZE BEARINGS, SUMP LUBRICATION.

Dimensions

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

Length

122.0 cm

Width

30.0 cm

Height

70.0 cm

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Energy-electric

Category

Generation

Sub-Category

N/A

Manufacturer

AKA

ESCO

Country

United States of America

State/Province

Connecticut

City

Stamford

Context

Country

North America

State/Province

Unknown

Period

THIS TYPE OF MOTOR GENERATOR USED C. 1925- 1935.

Canada

PART OF A LARGE & VARIED COLLECTION OF ELECTRICAL ITEMS ACQUIRED BY ONTARIO HYDRO IN THE 1960S. THIS COLLECTION CONSISTS OF OVER 7500 ARTIFACTS, AND IS THOUGHT TO BE THE LARGEST & MOST COMPREHENSIVE IN CANADA. IT WAS DONATED IN ITS ENTIRETY TO THE NATIONAL MUSEUM OF SCIENCE & TECHNOLOGY IN 1992.

Function

TO CONVERT 110V 60HZ ALTERNATING CURRENT INTO 1000V 5A DIRECT CURRENT.

Technical

EXAMPLE OF EARLY POWER SUPPLY SYSTEM PRIOR TO HIGH VOLTAGE, HIGH CURRENT, VACUUM TUBE (MERCURY RECTIFIER) TUBES. TODAY ( 1997) THIS SYSTEM WOULD BE SOLID STATE- THAT IS, TRANSFORMER & SOLID STATE RECTIFIER. PROBABLY USED IN BROADCAST RADIO TRANSMITTER DESIGNED C. 1922- 1930. (AS PER GEB)

Area Notes

Unknown

Details

Markings

Mfr's plate on motor end reads: " ELECTRIC SPECIALTY CO./ STAMFORD CONN. U.S.A./ TRADE [ESCO LOGO] MARK/ ALTERNATING CURRENT/ TYPE B625 VOLTS 110 H.P. 1/ PH. 1 CYC. 60 R.P.M. 3500/ NO. 41450 AMPS. FUSE ". Small plate mounted on band over join of motor & generator reads: " 792 ". Second plate, on generator end, reads: " ELECTRIC SPECIALTY CO./ STAMFORD, CONN.U.S.A./ TRADE [ESCO LOGO] MARK/ DIRECT-CURRENT/ TYPE R324 NO. 56119/ VOLTS 1000 AMP..5 R.P.M. 3500/ H.P. WIND'G COMP. FUSE AMP. "/ Plate on switch box reads: " PATENTED WARD LEONARD RHEOSTAT/ TYPE SPEC. NO. 19241/ VOLTS AMPS OHMS 1000/ WARD LEONARD ELECTRIC CO./ MOUNT VERNON, N.Y., U.S.A. "./ Fitted with " VOLTAGE FUSE ": text not accessible for transcription./ All connections, etc. labelled.

Missing

NONE

Finish

BLACK ENAMEL FINISH.

Decoration

N/A