Level, striding

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Ingenium, 1990.0282.004
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OBJECT TYPE: N/A
DATE: 1910
ARTIFACT NUMBER: 1990.0282.004

MANUFACTURER: HEYDE, GUSTAV GMBH
MODEL: Unknown
LOCATION: Dresden, Germany

More Information

General Information

Serial #: N/A
Part Number: 4
Total Parts: 4
AKA: N/A
Patents: N/A
General Description: PRIMARILY BRASS; VERTICAL CIRCLE & VERNIERS GRADUATED ON SILVER. GLASS TUBE LEVELS & OPTICS. CELLULOID SHADES ON READING MICROSCOPE EYEPIECES OVER VERTICAL CIRCLE..1PT &.2PT CASES MADE OF WOOD. CIRCLE ON LEVELLING LEG ON.1 BASE MAY BE DIVIDED ON PLATINUM

Dimensions

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

Length: 25.0 cm
Width: 4.0 cm
Height: 8.0 cm
Thickness: N/A
Weight: N/A
Diameter: N/A
Volume: N/A

Lexicon

Group: Exploration and Survey
Category: Measurement-angles
Sub-Category: N/A

Manufacturer

AKA: HEYDE
Country: Germany
State/Province: Unknown
City: Dresden

Context

Country: Canada
State/Province: Unknown
Period: THIS TYPE OF INSTRUMENT USED C.1910+. THIS INSTRUMENT PROBABLY USED C.1915-1960S.
Canada: ORIGINALLY PURCHASED C.1915 BY DOMINION OBSERVATORY, ALONG WITH TWO OTHER ASTRONOMICAL TRANSITS. AS A HIGHLY PRECISE, PORTABLE TRANSIT INSTRUMENT IT WAS PROBABLY USED ON MANY SURVEYS BY GEOLOGICAL SURVEY OF CANADA (GSC), TO WHOM IT WAS LOANED. IT CONTINUED TO BE USED BY GEODETIC SURVEY IN THE 1960S.
Function: TO DETERMINE TIME, LATITUDE, LONGITUDE & AZIMUTH IN ORDER TO ESTABLISH REFERENCE POINTS IN TRIANGULATION SURVEYS.
Technical: THIS TYPE OF PORTABLE TRANSIT INSTRUMENT IS KNOWN AS THE BROKEN-TELESCOPE TRANSIT: THE LIGHT WHICH PASSES THROUGH THE OBJECT GLASS IS REFLECTED THROUGH A RIGHT ANGLE BY MEANS OF A PRISM PLACED IN THE TRUNNION AXIS. AN EYE PIECE IS FITTED AT ONE END OF THE HOLLOW AXIS & A LAMP AT THE OTHER. BECAUSE OF THIS OPTICAL DESIGN THE STANDARDS CAN BE MADE LOWER AND THE INSTRUMENT MORE COMPACT (REF.3,P.62).
Area Notes: Unknown

Details

Markings: GLASS TUBE WITH WHITE INTERIOR LINING: DIVIDED 0- 40, IN MIRROR SCRIPT, BY SINGLE INCREMENTS. LEVEL CASING MARKED ' 1,25 '.
Missing: LEVEL HAS BROKEN GLASS TUBES/ READING MIRROR DETACHED: MIRROR FACE BROKEN, WITH MOST PIECES MISSING- MARKED .4PT. STRIDE LEVEL & MIRROR STORED IN BOX COMPARTMENT IN .2PT CASE.
Finish: STRIDE LEVEL: METAL CASING PAINTED MEDIUM GREY.
Decoration: N/A

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

HEYDE, GUSTAV GMBH, Level, striding, before 1910, Artifact no. 1990.0282, Ingenium – Canada’s Museums of Science and Innovation, http://collection.ingeniumcanada.org/en/id/1990.0282.004/

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