General Information

Serial #

163093

Part Number

1

Total Parts

2

AKA

N/A

Patents

N/A

General Description

WOOD CASE WITH METAL HARDWARE/ SYNTHETIC INSTRUMENT CASING WITH SYNTHETIC & METAL WORKING PARTS/ GLASS PARTS/ PAPER INSTRUCTION CARD AFFIXED TO CASE LID INTERIOR

Dimensions

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

Length

24.0 cm

Width

12.0 cm

Height

11.3 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

Leeds Northrup

Country

United States of America

State/Province

Pennsylvania

City

Philadelphia

Context

Country

United States of America

State/Province

Maine

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

PORTABLE INSTRUMENT USED TO MEASURE INSULATION RESISTANCE.

Technical

PORTABLE INSTRUMENT WITH INTEGRAL TELESCOPE & EASILY MOUNTABLE SCALE, USE INLABORATORY & IN FIELD FOR MEASURING RESISTANCE OF INSULATION. IT CONSISTS OF TELESCOPE & SCALE GALVANOMETER, 0.1 MEGOHM RESISTOR & AYRTON SHUNT (REF.2).

Area Notes

Unknown

Details

Markings

PLATE ON GALVANOMETER READS "PATENTED/ LEEDS & NORTHRUP CO./ PHILADELPHIA/ SER. NO. 163093/ MADE IN U.S.A."/ INDENTED LETTERING ON SYNTHETIC PART READS "LEEDS & NORTHRUP CO./ PHILADELPHIA"/ BLACK PRINTING ON INSTRUCTION CARD READS IN PART "The Leeds & Northrup Test Galvanometer/ DIRECTIONS FOR USE"

Missing

APPEARS COMPLETE

Finish

CASE STAINED LIGHT BROWN & COATED/ BLACK SYNTHETIC & PAINTED METAL PARTS/ PLATED PARTS/ WHITE CARDBOARD

Decoration

N/A