Psychrometer

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Ingenium, 1993.0372.001
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OBJECT TYPE
AERO/RIGID HANDLE/FAHREN
DATE
1933
ARTIFACT NUMBER
1993.0372.001
MANUFACTURER
JACOBSEN, R.C.
MODEL
AERO-PSYCHROMETER
LOCATION
Coppermine, Northwest Territories, Canada

More Information


General Information

Serial #
N/A
Part Number
1
Total Parts
1
AKA
N/A
Patents
N/A
General Description
NON-FERROUS METAL FRAME WITH SYNTHETIC HANDLE/ FERROUS METAL RESERVOIR WITH CORK STOPPER/ WOOD SCALE/ GLASS THERMOMETERS/ SYNTHETIC TAPE? USED TO BIND THERMOMETERS TO SCALE/ MERCURY/ FABRIC (COTTON?) WICK

Dimensions

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

Length
28.2 cm
Width
17.8 cm
Height
5.4 cm
Thickness
N/A
Weight
N/A
Diameter
N/A
Volume
N/A

Lexicon

Group
Meteorology
Category
Upper air pressure, temperature & humidity measurement
Sub-Category
N/A

Manufacturer

AKA
JACOBSEN
Country
Canada
State/Province
Northwest Territories
City
Coppermine

Context

Country
Canada
State/Province
Unknown
Period
1933 & AFTER
Canada
MADE & USED BY R.C. JACOBSEN OF MSC (C. 1931-1951). JACOBSEN TOOK PART IN CANADIAN INTERNATIONAL POLAR YEAR EXPEDITION TO COPPERMINE, NWT (1932); WAS INVOLVED IN DESIGN OF MSC RADIOSONDE IN 1930'S; DESIGNED METEO INSTRUMENTS FOR AIRCRAFT WHICH HE USED TO MAKE OBSERVATIONS OVER LAKE ONTARIO IN HIS OWN PLANE.
Function
INSTRUMENT FOR DETERMINING ATMOSPHERIC HUMIDITY BY COMPARING DIFFERENT READINGS FROM TWO THERMOMETERS, ONE WITH BULB KEPT WET. THIS EXAMPLE WAS INTENDED TO BE MOUNTED ON AIRCRAFT IN ORDER TO TAKE UPPER AIR HUMIDITY READINGS.
Technical
JACOBSEN DESIGNED & BUILT THIS PSYCHROMETER AT COPPERMINE, NWT, IN 1932, APPARENTLY OUT OF MATERIALS AT HAND. IT HAS WET & DRY BULB THERMOMETERS, & RESERVOIR FOR WATER TO KEEP WICK WET. IT WOULD BE MOUNTED ON EXTERIOR OF AIRCRAFT & MOTION OF AIRCRAFT WOULD PROVIDE ASPIRATION WHILE READINGS WERE TAKEN BY PILOT FROM INSIDE.
Area Notes
Unknown

Details

Markings
HAND INCISED LETTERING ON FRAMEREADS "1933 MADE IN COPPERMINE NWT RCJ/ HAND PRINTED SCALE WITH BLACK MARKINGS & RED NUMBERS FOR -40 TO +90 F./ HAND PRINTED BLACK LETTERING ON RESERVOIR READS "FILL/ FOR EACH/ FLIGHT"/ BLACK SCALE MARKINGS ON DRY BULB THERMOMETER FOR -30 TO +120 F./ BLACK SCALE MARKINGS ON DRY BULB THERMOMETER & LETTERING READING "NPL 30" & "W30677", WITH NEGRETTI & ZAMBRA LOGO
Missing
APPEARS COMPLETE
Finish
GREY FRAME & RESERVOIR/ BROWN HANDLE/ COLOURLESS TRANSPARENT THERMOMETERS WITH WHITE BACKS, ONE WITH RED STRIPE/ METALLIC BULB/ DISCOLOURED WHITE WICK/ YELLOW PAINTED SCALE
Decoration
N/A

CITE THIS OBJECT

If you choose to share our information about this collection object, please cite:

JACOBSEN, R.C., Psychrometer, 1933, Artifact no. 1993.0372, Ingenium – Canada’s Museums of Science and Innovation, http://collection.ingeniumcanada.org/en/id/1993.0372.001/

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