Bathythermograph
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2004.0317.001
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- OBJECT TYPE
- deformation/Bourdon tube/xylene
- DATE
- 1960
- ARTIFACT NUMBER
- 2004.0317.001
- MANUFACTURER
- GM Mfg. Co.
- MODEL
- 3091/125
- LOCATION
- New York, New York, United States of America
More Information
General Information
- Serial #
- N/A
- Part Number
- 1
- Total Parts
- 5
- AKA
- N/A
- Patents
- N/A
- General Description
- metal casing and parts/ glass slide
Dimensions
Note: These reflect the general size for storage and are not necessarily representative of the object's true dimensions.
- Length
- 79.5 cm
- Width
- N/A
- Height
- N/A
- Thickness
- N/A
- Weight
- N/A
- Diameter
- 12.6 cm
- Volume
- N/A
Lexicon
- Group
- Meteorology
- Category
- Atmospheric temperature measurement
- Sub-Category
- N/A
Manufacturer
- AKA
- GM
- Country
- United States of America
- State/Province
- New York
- City
- New York
Context
- Country
- Canada
- State/Province
- Unknown
- Period
- 1970s; this instrument was apparently in use for 45 years (Ref. 4)
- Canada
-
A bathytherrmograph possibly of a type used by the Meteorological Service of Canada to gather ocean temperature data. Part of a large collection of meteorological instruments acquired from the Meteorological Service of Canada (previously Atmospheric Environment Service) by the CSTM since 1967. MSC is the government agency responsible for collecting and disseminating meteorological data and forecasts in Canada. It was founded in 1871 in Toronto where it is still headquartered. The MSC was originally on the University of Toronto downtown campus but moved to Downsview in 1971 on land owned by UofT. The headquarters houses laboratories, research facilities and calibration and instrument maintenance facilities (now largely contracted out). - Function
-
An instrument for obtaining, from a ship under way, a record of temperature against depth (strictly speaking, pressure) in the upper 300 m of the ocean. - Technical
-
A specialized temperature recorder for use at moderate ocean depths, consisting of a thermal element connected to a recording mechanism, within a torpedo shaped casing. The bathythermograph was lowered into the sea and retrieved by means of a wire rope and could be operated when the ship was underway at speeds up to 18 knots. The thermal element of the bathythermograph consists of a xylene-filled copper coil, which actuates a stylus through a Bourdon tube. The pressure element is a copper aneroid capsule that moves a smoked glass slide at right angles to the motion of the stylus. A double analog record is thus obtained as the BT is lowered and recovered. Once removed, the slide is placed in a magnifying viewer to be read against a depth/ temperature grid in the viewer. This type of device has generally been replaced by the expendable bathythermograph (XBT) for use up to 1800 m., in which the temperature data read by a thermistor and transferred by a fine wire to a shipboard recorder (Refs.1-2). - Area Notes
-
Unknown
Details
- Markings
- label reads 'GM MFG. COMPANY/ NEW YORK 3, NY/ Cat. No. 202.A130/ Model No. #3091/ Type: 125 Meter/ Bathythermogr...' [last letters missing]
- Missing
- unknown - appears complete
- Finish
- grey painted casing tip/ copper coloured body with gold coloured sleeve/ other finishes obscured by corrosion
- Decoration
- N/A
CITE THIS OBJECT
If you choose to share our information about this collection object, please cite:
GM Mfg. Co., Bathythermograph, circa 1960, Artifact no. 2004.0317, Ingenium – Canada’s Museums of Science and Innovation, http://collection.ingeniumcanada.org/en/id/2004.0317.001/
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