Compass

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Ingenium, 1987.2121.009
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OBJECT TYPE
trough
DATE
Unknown
ARTIFACT NUMBER
1987.2121.009
MANUFACTURER
Suss Nandor R.T.
MODEL
Unknown
LOCATION
Budapest, Hungary

More Information


General Information

Serial #
N/A
Part Number
9
Total Parts
10
AKA
N/A
Patents
N/A
General Description
PRIMARILY METAL CONSTRUCTION. GLASS OPTICS & THERMOMETER ON .1. SOME SYNTHETIC COMPONENT PIECES. .2 FITTED WITH GLASS SUNSHADE OVER CIRCLE & 2 GLASS LEVEL VIALS; HORIZONTAL CIRCLE DIVIDED ON SILVER. CASES FOR .1-.2, .8-.10 MADE OF WOOD

Dimensions

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

Length
2.8 cm
Width
2.0 cm
Height
11.4 cm
Thickness
N/A
Weight
N/A
Diameter
N/A
Volume
N/A

Lexicon

Group
Physics
Category
Geophysics
Sub-Category
N/A

Manufacturer

AKA
Suss
Country
Hungary
State/Province
Unknown
City
Budapest

Context

Country
Canada
State/Province
Ontario
Period
THIS INSTRUMENT USED BETWEEN 1928-1935. THIS TYPE OF INSTRUMENT USED LATE 1920S- EARLY 1930S (REF.1, P.167)
Canada
ONE OF TWO EOTVOS-TYPE TORSION BALANCES PURCHASED FOR JOINT USE OF DOMINION OBSERVATORY & GEOLOGICAL SURVEY. THESE INSTRUMENTS WERE AMONG THE FIRST IN CANADA. A.H. MILLER (1886-1962), USED THESE BALANCES, AND OTHER EQ. IN SOME OF THE EARLIEST GRAVITY SURVEYS & ISOSTACY STUDIES CONDUCTED IN CANADA (REF.2) SEE ALSO 872131
Function
TO MEASURE THE GRADIENT OF GRAVITY AT A SPECIFIC POINT OR LOCATION, AND THE CURVATURE OF THE EQUIPOTENTIAL SURFACE.
Technical
DEV'T BY HUNGARIAN BARON ROLAND VON EOTVOS THE TORSION BALANCE BECAME ONE OF THE MAIN INSTS. USED IN GEOPHYSICAL PROSPECTING IN L.1920S-E.1930S. THE BALANCE CONSISTS OF A HORIZONTAL BEAM WITH A MASS AT EITHER END (ONE ON THE BEAM, ONE SUSPENDED FROM IT), THE WHOLE SYSTEM SUSPENDED BY A TORSION FIBRE. THE BEAM WAS SET IN A PARTICULAR AZIMUTH, RELEASED, AND THE TENSION IN THE SUSPENDING FIBRE NECESSARY TO PRODUCE EQUILIBRIUM NOTED. THE BEAM WAS THEN RESET AND MEASUREMENTS REPEATED, THROUGH A SEQUENCE OF 5 AZIMUTHS. IT TOOK APPROX. 1 HOUR FOR THE BEAM TO COME TO REST. BALANCES HAVING 2 BEAMS, LIKE 872121, CUT TIME IN HALF, REQUIRING ONLY 3 SETS OF OBSERVATIONS. (Ref.1, p.167)
Area Notes
Unknown

Details

Markings
Trough compass, in wooden case .9PT: SN " 36867 " stamped in top of wooden case. SN " 36867 " stamped in one side of casing. " N " incised in top, and crudely scratched in adjoining end panel.
Missing
From CA of 02/07/2002 by David Daley: Yes - empty compartment in small trunk suggests missing components
Finish
Unknown
Decoration
N/A

CITE THIS OBJECT

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

Suss Nandor R.T., Compass, Unknown Date, Artifact no. 1987.2121, Ingenium – Canada’s Museums of Science and Innovation, http://collection.ingeniumcanada.org/en/id/1987.2121.009/

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