General Information

Serial #

44490A

Part Number

1

Total Parts

1

AKA

N/A

Patents

N/A

General Description

METAL (ALUMINUM) LIGHT CASING, TRANSFORMER CASING/ CERAMIC INSULATOR/ GLASS LAMP BULB IN METAL LAMP, WITH SILVER-BACKED? MIRROR/ SYNTHETIC (PLEXIGLAS TYPE) COVER (POSSIBLY NOT ORIGINAL)/ SYNTHETIC CABLE & PARTS/ METAL PARTS

Dimensions

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

Length

89.0 cm

Width

56.0 cm

Height

39.0 cm

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Meteorology

Category

Cloud height & motion measurement

Sub-Category

N/A

Manufacturer

AKA

Westinghouse

Country

Canada

State/Province

Ontario

City

Hamilton

Context

Country

Canada

State/Province

Ontario

Period

GENERAL: 1940'S TO PROBABLY 1960'S/ SPECIFIC: CIRCA 1970? TO BEFORE 1999

Canada

TYPE OF APPARATUS USED BY CANADIAN METEOROLOGICAL SERVICE FROM 1940S TO 1960S & PERHAPS LONGER. VERY SIMILAR PROJECTOR IS ILLUSTRATED IN CANADIAN METEOROLOGIST MIDDLETON'S 1941, 1947, 1953 EDITIONS (SEE REF. 1). THIS EXAMPLE WAS DISPLAYED OUTDOORS AT NMST IN TECHNOLOGY PARK.

Function

SEARCHLIGHT USED AT NIGHT TO PROJECT SPOT ON BASE OF CLOUDS, ALTITUDE OF WHICH IS THEN MEASURED BY MEANS OF ALIDADE IN ORDER TO CALCULATE HEIGHT OF CLOUD BASE.

Technical

SIMPLE, DIRECT & INEXPENSIVE METHOD OF DETERMINING CLOUD HEIGHT USING BEAM OF LIGHT PROJECTED ON TO BASE OF CLOUD AT NIGHT; ANGULAR ELEVATION IS MEASURED & HEIGHT CALCULATED. IN CANADIAN SERVICE, AS IN UK BUT UNLIKE USA, TILTABLE PROJECTOR WAS USED INSTEAD OF FIXED VERTICAL LIGHT TO OBTAIN GREATER ACCURACY OF MEASUREMENT OF CLOUDS AT ABOUT 3000 FT..

Area Notes

Unknown

Details

Markings

PLATE READING "Westinghouse/ CEILING/ PROJECTOR/ SN 44490A/ CANADIAN WESTINGHOUSE COMPANY LIMITED/ HAMILTON, CANADA"/ BLACK "60 CYCLES" ON TRANSFORMER CASING

Missing

COMPLETE

Finish

GREY CASINGS/ BLACK LAMP WITH WHITE? BULB/ BLACK CABLE

Decoration

CAST "W" LOGO ON CASINGS