General Information

Serial #

N/A

Part Number

1

Total Parts

8

AKA

N/A

Patents

N/A

General Description

ORIGINAL BRASS BALANCE; BRASS, STEEL? & METAL PARTS; GLASS & SYNTHETIC PARTS; MOUNTED IN ALUMINUM CASING ON WOOD TABLE (CSTM CONSTRUCT)

Dimensions

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

Length

63.0 cm

Width

40.0 cm

Height

67.0 cm

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Metrology

Category

Mass/weight

Sub-Category

N/A

Manufacturer

AKA

NRC

Country

Canada

State/Province

Ontario

City

Ottawa

Context

Country

Canada

State/Province

Ontario

Period

CIRCA 1938-1997, IN VARIOUS INCARNATIONS

Canada

THIS WAS CANADA'S PRIMARY BALANCE USED TO MAKE KILOGRAM MASS COMPARISONS FROM TIME IT WAS COMPLETED UNTIL IT WAS DECOMMISSIONED IN 1997. IT WAS THUS MOST IMPORTANT PIECE OF EQUIPMENT FOR MASS MEASUREMENT AS ALL MASS STANDARDS IN CANADA WERE REFERENCED BACK TO RESULTS ACHIEVED WITH IT. IT WAS ALSO PART OF INTERNATIONAL STANDARDS COMPARISON NETWORK.

Function

PRIMARY BALANCE USED TO MAKE KILOGRAM MASS COMPARISONS TO VERIFY MASS STANDARDS.

Technical

UNIQUE APPARATUS DESIGNED BY NRC TO MEET STRINGENT REQUIREMENTS OF MODERN MASS DETERMINATIONS, CAPABLE OF MEASURING KILOGRAM TO BETTER THAN 0.02-0.03MG. THIS WAS ACHIEVED BY AUTOMATING PROCESS OF MOVING MASSES & WEIGHTS, USING LASER TO READ & GRAPH MEASUREMENTS, COMPUTER CONTROL.

Area Notes

Unknown

Details

Markings

NO ORIGINAL MARKINGS VISIBLE; PARTS MARKED "107021A LINEAR INTERFEROMETER/ 1944A01618/ HEWLETT-PACKARD", "10707A BEAM BENDER/ 4A01006/ HEWLETT-PACKARD", "10707A BEAM BENDER/ HEWLETT-PACKARD"

Missing

UNKNOWN From CA of 06/04/2001 by Myles Bailey: No - Removed from original site and had not been changed since use.

Finish

ORIGINAL PARTS LACQUERED BRASS; UNLACQUERED BRASS & BLACK PAINTED PARTS; PLATED & BRUSHED METAL PARTS; UNFINISHED WOOD

Decoration

MOTTLED PATTERN ON ORIGINAL BRASS BASE