Calculator, air navigation
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2010.0178.001
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- OBJECT TYPE
- altitude correction/dial
- DATE
- 1944
- ARTIFACT NUMBER
- 2010.0178.001
- MANUFACTURER
- Cruver Mfg. Co.
- MODEL
- AN5837-1
- LOCATION
- Unknown
More Information
General Information
- Serial #
- N/A
- Part Number
- 1
- Total Parts
- 2
- AKA
- N/A
- Patents
- N/A
- General Description
- Round flat black synthetic disks revolve around silver metal centre; silver metal locking screw; clear synthetic indicator arms. Printed text and spiral scales are pale ivory in colour: NB- this may be radium paint, allowing instrument to be read in dim light/darkness.
Dimensions
Note: These reflect the general size for storage and are not necessarily representative of the object's true dimensions.
- Length
- N/A
- Width
- N/A
- Height
- 1.8 cm
- Thickness
- N/A
- Weight
- N/A
- Diameter
- 21.5 cm
- Volume
- N/A
Lexicon
- Group
- Aviation
- Category
- Navigation instruments & equipment
- Sub-Category
- N/A
Manufacturer
- AKA
- Cruver
- Country
- Unknown
- State/Province
- Unknown
- City
- Unknown
Context
- Country
- Worldwide
- State/Province
- Unknown
- Period
- This type produced for use in 1944/ WWII. This example may be new/unused.
- Canada
-
Unknown - Function
-
Unknown - Technical
-
Uses temperature and barometric pressure readings to determine true altitude. - Area Notes
-
Unknown
Details
- Markings
- Markings on calculator front includes "COMPUTER, ALTITUDE CORRECTION/ AN 5837-1 MFRS. PART NO. C 1920/ ORDER NO. (11-107) 44-10337/ CRUVER MANUFACTURING CO." Markings on reverse include: "INSTRUCTIONS FOR USING ALTITUDE CORRECTION COMPUTER/ "THIS COMPUTER GIVES TRUE ALTITUDE ABOVE A PLATEAU FROM INDICATED/ VALUES."/ 1. SET THE CLAMPING ARM (P.A.) ON THE PRESSURE ALTITUDE OF THE PLATEAU/ (OR TAKE-OFF LEVEL.)/ 2. SET THE FREE ARM (degrees C.) TO THE MEAN OF THE TEMPERATURE AT THE PLATEAU AND THE/ TEMPERATURE ALOFT./ 3. THE LIGHT FIGURES (BLACK BACKGROUND) UNDER THE FREE ARM INDICATOR LINE AND THE/ BLACK FIGURES (LIGHT BACKGROUND) UNDER THE CLAMPED ARM ARE CORRESPONDING TRUE AND/ INDICATED VALUES ABOVE PLATEAU LEVEL." "AN/0286" stamped in off-white ink, below printed instructions.
- Missing
- Appears complete.
- Finish
- Round flat black synthetic disks revolve around silver metal centre; silver metal locking screw; clear synthetic indicator arms. Printed text and spiral scales are pale ivory in colour: NB- this may be radium paint, allowing instrument to be read in dim light/darkness.
- Decoration
- N/A
CITE THIS OBJECT
If you choose to share our information about this collection object, please cite:
Cruver Mfg. Co., Calculator, air navigation, circa 1944, Artifact no. 2010.0178, Ingenium – Canada’s Museums of Science and Innovation, http://collections.ingeniumcanada.org/en/item/2010.0178.001/
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