General Information

Serial #

901

Part Number

1

Total Parts

13

AKA

N/A

Patents

N/A

General Description

BRASS WEIGHT/ PT: WOODEN BOX WITH VELVET AND SILK LINING AND METAL HARDWARE

Dimensions

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

Length

2.5 cm

Width

N/A

Height

3.5 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

Kelvin

Country

Scotland

State/Province

Unknown

City

Glasgow

Context

Country

Canada

State/Province

Unknown

Period

PROBABLY USED IN THE EARLY PART OF THE 20TH C

Canada

TYPE SAMPLE

Function

USED WITH AN ELECTRIC BALANCE TO DETERMINE THE VALUE OF ELECTRIC CURRENT IN AMPERES. BALANCE IS RESTORED TO THE BEAMS WHEN AN ELECTRIC CURRENT PASSES THROUGH THE COILS BY SLIDING THE WEIGHTS ALONG A GRADUSTED SCALE ON THE BEAM FROM WHICH THE CURRENT CAN BE READ IN AMPERES.

Technical

THESE WEIGHTS ARE MEANT TO BE USED WITH A KELVIN TYPE ELECTRICAL BALANCE. KELVIN DEVELOPED A COMMERCIAL INSTRUMENT BASED ON LORD RAYLEIGH'S CURRENT BALANCE OF 1883 [REF 1]

Area Notes

Unknown

Details

Markings

PAPER LABELS AFFIXED TO INSIDE OF LID READ IN PART: 'When used as Centi Ampere Balance/ ELECTRIC BALANCE No. 901/ Weight/ in Grammes/ Amperes/ per Division/ of Fixed Scale/ Carriage Alone/ " + Weight 1/ 1.7984 -.005/ " + Weight 2/ 7.1937 -.01/ " + Weight 3/ 28.7748 -.02'/ 'When used as Hekto Ampere Balance/ [same as above except values]/ 3.4442 - 0.25/ 6.8883 - 0.5/ 13.7766 - 1.0/ With 0.25 Amt. through fine wire coils.'/ .1 WEIGHT: STAMPED IN METAL 'V.W./ 3'

Missing

MAGNIFYING GLASS AND CONNECTION ROD/ POSSIBLY TWEEZERS/ METAL ROD

Finish

WEIGHT: LACQUERED METAL/ WOODEN BOX STAINED AND VARNISHED; PURPLE SILK AND VELVET LINING

Decoration

N/A