Balance, torsion
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1987.2121.001
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- OBJECT TYPE
- DOUBLE BEAM
- DATE
- 1928
- ARTIFACT NUMBER
- 1987.2121.001
- MANUFACTURER
- Suss Nandor R.T.
- MODEL
- SUSS
- LOCATION
- Budapest, Hungary
More Information
General Information
- Serial #
- 36867
- Part Number
- 1
- 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
- 111.0 cm
- Width
- 41.0 cm
- Height
- 27.7 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
- TWO LOGOS- 1 A HERALDIC SHIELD, 1 A TRANSIT MARKED 'S', AND TEXT 'Original Eotvos/ Made in Hungary/ Suss Nandor R.T./ Budapest/ 36867' INCISED ON CENTER FRONT OF BALANCE. BALANCE ARMS LABELLED 'I' & 'II'; LOCKING COLLARS ON EACH BEAM LABELLED 'FREE <-I-> FAST' & 'FREE<- II-> FAST'. TWO B&W PHOTOS OF BUDAPEST GLUED INSIDE CASE; GLUED INSIDE LID IS NOTICE: 'Caution/ Do not forget to take out the fixing plates from the/ innermost boxes before making the balances free/ The plates are only to be used exceptionally for long/ transports and not at all during the Survey/ First free below and then above'/ .1PT case: ‘On the contrary fasten first above and then below!/ The cap is screwed on the top of the instrument. Attention to the thermometer when taking out or/ putting in the instrument!/ BARO EOTVOS LORANS/ BUDAPEST/ GEOFIZIKAIINTEZET ". SN " 36867 " incised on case lid, above latch. "45 lbs/ #263/ 36867/ SATELLITE/ ANTENNA " handwritten in black marker on case top. Shipping tag tied to case includes text : " SHIP/ TO/ Dr. J.R. Weber/ Dominion Observatory/ Ottawa, Ont./ ... PACKAGE/ NUMBER 46/ FROM PCSP, A617, NWT "./ .1PT case: ‘On the contrary fasten first above and then below!/ The cap is screwed on the top of the instrument. Attention to the thermometer when taking out or/ putting in the instrument!/ BARO EOTVOS LORANS/ BUDAPEST/ GEOFIZIKAIINTEZET ". SN " 36867 " incised on case lid, above latch. "45 lbs/ #263/ 36867/ SATELLITE/ ANTENNA " handwritten in black marker on case top. Shipping tag tied to case includes text : " SHIP/ TO/ Dr. J.R. Weber/ Dominion Observatory/ Ottawa, Ont./ ... PACKAGE/ NUMBER 46/ FROM PCSP, A617, NWT ".
- Missing
- APPEARS COMPLETE. MUST BE USED WITHIN PORTABLE HUT IN ORDER TO SHIELD INST. FROM WIND, TEMP. ETC. From CA of 02/07/2002 by David Daley: Yes - empty compartment in small trunk suggests missing components
- Finish
- DULL, FLAT GREEN-GREY ENAMEL FINISH ON MOST COMPONENTS; SOME FITTINGS OR COMPONENT PARTS HAVE BLACK, WHITE METAL AND/OR LACQUERED BRASS FINISHES. .1PT & .2 PT CASES HAVE GREY PAINTED EXTERIOR, LACQUERED FINISH ON INTERIOR, WITH SOME GREEN FELT PADDING.
- Decoration
- N/A
CITE THIS OBJECT
If you choose to share our information about this collection object, please cite:
Suss Nandor R.T., Balance, torsion, before 1928, Artifact no. 1987.2121, Ingenium – Canada’s Museums of Science and Innovation, http://collections.ingeniumcanada.org/en/id/1987.2121.001/
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