General Information

Serial #

680789

Part Number

1

Total Parts

2

AKA

N/A

Patents

N/A

General Description

.1 CAST-IRON, STEEL, COPPER AND POSSIBLY OTHER METAL MATERIALS OF CONSTRUCTION; FABRIC COVERING ON ELECTRICAL CORDS; SOME SYNTHETIC FITTINGS..2 MAGNETIZED STEEL, COPPER, CAST-IRON AND POSSIBLY OTHER METAL MATERIALS OF CONSTRUCTION. BOTH UNITS MOUNTED ON SLATE BASE.

Dimensions

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

Length

58.5 cm

Width

23.0 cm

Height

30.0 cm

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Energy-electric

Category

Conversion

Sub-Category

N/A

Manufacturer

AKA

HOLTZER CABOT

Country

United States of America

State/Province

Massachusetts

City

Boston

Context

Country

North America

State/Province

Unknown

Period

THIS TYPE OF MOTOR & DYNAMO SET USED IN EARLY 20TH C.

Canada

Unknown

Function

TO PRODUCE AN ELECTRIC CURRENT, AND CONVERT ELECTRICAL INTO MECHANICAL ENERGY. THIS COMBINATION USED SPECIFICALLY TO PRODUCE AUDIBLE RINGING SOUND IN A SMALL TELEPHONE EXCHANGE.

Technical

THIS MOTOR & MAGNETO COMBINATION WOULD LIEKLY HAVE BEEN USED IN A SMALL TELEPHONE EXCHANGE BUILDING, TO PRODUCE AN AUDIBLE RINGING SOUND FOR UP TO APPROX. 1,000 TELEPHONES. (AS PER G. BLANCHETT,VOLUNTEER DOCUMENTALIST) EFFICIENT ARRANGEMENT, DELIVERING PULSATING & ALTERNATING CURRENT. (REF. 1)

Area Notes

Unknown

Details

Markings

.1 Plate on motor housing reads "DIRECT CURRENT MOTOR/ MADE IN U.S.A./ THE HOLTZER-CABOT ELECTRIC CO./ BOSTON-CHICAGO/ No. 680789 AMPS.5 H.P. 1/10/ R.P.M. 1150 WINDING SHUNT/ TIME CONT. TEMP. RISE 40"..2 Plate on magneto reads "THE HOLTZER-CABOT ELEC. CO./ BOSTON-CHICAGO/ U.S.A./ TYPE MSW R.P.M. 1150/ VOLTS 80 NO. 743113". Plate on top reads "CAUTION NEVER REMOVE/ ARMATURE OR MAGNETS". Incised on both oil reservoirs is "GITS BROS. MFG. CO./ CHI./ PAT."

Missing

UNKNOWN.

Finish

BLACK ENAMEL FINISH ON MOST EXTERIOR SURFACES OF.1 &.2. SLATE BASE HAS BLACK TOP; DARK GREY SIDES.

Decoration

N/A