Wire, torsion balance
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1987.2121.010
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- OBJECT TYPE
- N/A
- DATE
- Unknown
- ARTIFACT NUMBER
- 1987.2121.010
- MANUFACTURER
- Suss Nandor R.T.
- MODEL
- Unknown
- LOCATION
- Budapest, Hungary
More Information
General Information
- Serial #
- N/A
- Part Number
- 10
- 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
- 48.3 cm
- Width
- 8.0 cm
- Height
- 2.5 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
- Torsion wire box NB: Box designed to contain 2 wires: these are secured behind the paper label, and are almost invisible. USE EXTREME CAUTION IN HANDLING EITHER THE LABEL OR THE WIRES./ Presumed to be alternate or spare wires: case is not stamped with balance serial number, and there is no provision for storage of this box within larger cases. Paper label fastened over wires bears following handwritten text: " Length= 40.cm/ { Torsion-wire No. XV.b 48. Torsion constant: 0.04030 CGS. Temperature coefficient: +0.054. sc. div./ Torsion-wire No. XV.b.54 Torsion constant: 0.04065 CGS. Temperature coefficient: +0.061 sc.div. ". Blue ink stamp on label reads: " BARO EOTVOS LORANO/ BUDAPEST/ GEOFIZIKAIINTEZET ". 4 screw fastening label over torsion wires- each incised "MURILLO/ No. 3 ".
- 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., Wire, torsion balance, Unknown Date, Artifact no. 1987.2121, Ingenium – Canada’s Museums of Science and Innovation, http://collections.ingeniumcanada.org/en/id/1987.2121.010/
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