General Information

Serial #

662

Part Number

1

Total Parts

1

AKA

N/A

Patents

N/A

General Description

METAL GALVANOMETER CASING & PARTS/ GLASS WINDOW/ WOOD CASE WITH METAL HARDWARE, FABRIC PADDING, PAPER LABELS

Dimensions

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

Length

19.5 cm

Width

19.3 cm

Height

8.2 cm

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Physics

Category

Demonstration & teaching equipment

Sub-Category

N/A

Manufacturer

AKA

Cambridge

Country

England

State/Province

Unknown

City

Unknown

Context

Country

United States of America

State/Province

New York

Period

Unknown

Canada

PART OF LARGE & VARIED COLLECTION OF OVER 7500 ELECTRICAL ITEMS ACQUIRED & DOCUMENTED BY ONTARIO HYDRO IN 1960S. COLLECTION WAS THOUGHT TO BE LARGEST & MOST COMPREHENSIVE IN CANADA & WAS DONATED TO NMST IN 1992.

Function

INSTRUMENT FOR DETECTING EXISTENCE & DETERMINING STRENGTH OF SMALL ELECTRIC CURRENTS.

Technical

IN 1903 ROBERT PAUL DESIGNED UNIPIVOT GALVANOMETER, WHICH COMBINED HIGH SENSITIVITY OF D'ARSONVAL MOVEMENT WITH ROBUSTNESS GREATER THAN THAT OF WESTON'S EARLIERDOUBLE PIVOTED COIL METER. IN 1919 PAUL'S FIRM AMALGAMATED WITH CAMBRIDGE INSTRUMENT CO. TO FORM CAMBRIDGE & PAUL INSTRUMENT CO., WHICH EXISTED UNDER THAT NAME UNTIL 1924 (REF. 3).

Area Notes

Unknown

Details

Markings

BLACK LETTERING ON DIAL FACE READS "THE CAMBRIDGE & PAUL/ INSTRUMENT Co. INC." & "No. 662"/ PLATES ON CASE EXTERIOR READS "PROPERTY OF/ ELECTRICAL TESTING LABORATORIES/ NEW YORK/ SERIAL NO. D-923" & "90"

Missing

APPEARS COMPLETE

Finish

BROWN STAINED & COATED WOOD WITH BLACK PAINTED HANDLE/ GREY GALVANOMETER CASING, WHITE DIAL, GOLD COLOURED PARTS, COLOURLESS TRANSPARENT GLASS/ BLACK PADDING

Decoration

N/A