General Information

Serial #

20/33

Part Number

1

Total Parts

1

AKA

N/A

Patents

N/A

General Description

ALL METAL

Dimensions

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

Length

70.5 cm

Width

11.2 cm

Height

75.0 cm

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Meteorology

Category

Surface wind speed & direction measurement

Sub-Category

N/A

Manufacturer

AKA

Environment CA

Country

Canada

State/Province

Unknown

City

Unknown

Context

Country

Canada

State/Province

Unknown

Period

1930's

Canada

THE 3 CUP ANEMOMETER WAS DESIGNED BY CANADIAN METEOROLOGIST JOHN PATTERSON OF THE CANADIAN METEOROLOGICAL SERVICE IN THE 1920'S; THIS EXAMPLE & SUCCESSIVE VERSIONS WERE USED BY THE CANADIAN SERVICE FOR DECADES.

Function

AN INSTRUMENT THAT MEASURES WIND SPEED & DIRECTION BY MEANS OF A CUPWHEEL & WIND VANE RESPECTIVELY, WITH THE READINGS RECORDED BY A SEPARATE ANEMOGRAPH.

Technical

PATTERSON SHOWED THAT THE 3 CUP WHEEL WAS SUPERIOR TO THE ROBINSON 4 CUP WHEEL USED PREVIOUSLY WHICH IT SUPPLANTED. HISANEMOVANE COMBINED A 3 CUP WHEEL & A WIND VANE ON A CONCENTRIC DOUBLE SHAFT. THIS IS AN EXAMPLE OF THE EARLIEST VERSION, USED WITH AN ANEMOGRAPH ONLY (E.G. 870866, 870867).

Area Notes

Unknown

Details

Markings

Incised lettering reading '20/33'

Missing

CUP ASSEMBLY? From CA of 12/10/1993 by Tony Missio: Yes - missing cup wheels

Finish

PAINTED ORANGE-BROWN

Decoration

N/A