Spherometer

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Ingenium, 1966.0436.001
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OBJECT TYPE
N/A
DATE
1885
ARTIFACT NUMBER
1966.0436.001
MANUFACTURER
Fauth Co.
MODEL
Unknown
LOCATION
Washington, District of Columbia, United States of America

More Information


General Information

Serial #
2083
Part Number
1
Total Parts
1
AKA
N/A
Patents
N/A
General Description
GLASS DISC/ METAL (BRASS?) CONSTRUCTION/ CW SOLID WOOD BOX, HAVING BRASS & IRON FITTINGS; SOME AREAS OF INTERIOR LINED WITH VELVET

Dimensions

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

Length
27.2 cm
Width
16.5 cm
Height
12.0 cm
Thickness
N/A
Weight
N/A
Diameter
N/A
Volume
N/A

Lexicon

Group
Exploration and Survey
Category
Instrument testing equipment
Sub-Category
N/A

Manufacturer

AKA
Fauth
Country
United States of America
State/Province
District of Columbia
City
Washington

Context

Country
Unknown
State/Province
Unknown
Period
AFTER C. 1885. DOMINION OBSERVATORY OPERATED C. 1905-1970. NRC MAY HAVE USED THE SPHEROMETER FOLLOWING 1970
Canada
PRECISION MEASURING DEVICE USED AT DOMINION OBSERVATORY, OTTAWA (C.1905-1970). THIS SPHEROMETER MAY HAVE BEEN USED ON A VARIETY OF ASTRONOMY, SURVEYAND/OR METROLOGY INSTRUMENTS EMPLOYED THERE. PRESUMABLY IT WAS ALSO USED BY NRC, FROM WHOM THE MUSEUM ACQUIRED THIS SPHEROMETER.
Function
TO MEASURE THE CURVATURE OF SOLID SPHERICAL SURFACES, EITHER CONVEX OR CONCAVE. IT IS USED TO MEASURE THE INEQUALITY OF PIVOTS (POSTS OR TRUNNIONS ON WHICH A VARIETY OF SCIENTIFIC INSTRUMENTS REST), AND TO MEASURE THE CURVATURE OF LENSES.
Technical
MORE RELIABLE & EASIER TO USE THAN A CONTACT LEVEL, THE SPHEROMETER IS AN EXTREMELY ACCURATE MEASURING INSTRUMENT. WEAR OF MOUNTINGS ON A VARIETY OF SCIENTIFIC INSTRUMENTS (IE. TRANSITS, THEODOLITES, LEVELS, TELESCOPES, ETC.) WILL PRODUCE ERRORS IN READINGS: THESE INSTRUMENTS MUST BE CHECKED REGULARLY FOR SUCH WEAR * CONT
Area Notes
Unknown

Details

Markings
'FAUTH & CO./ NO. 2083/ WASHN ('N' UNDERLINED) D.C.' STAMPED INTO METAL BENEATH GLASS DISC, AND HIGHLIGHTED WITH WHITE/ 'DOM.OBS 174' STAMPED INTO BASE/ 'DOM.OBS./ 174' INCISED IN LID OF BOX
Missing
THREE-LEGGED TRIVET WITH MICROMETER SCREW/ ONE LATCH MISSING FROM CASE
Finish
TOP & BOTTOM PANELS, CROSS-PIECE & PERFORATED INSIDE-FRAME HAVE BEEN BLUED. SCREWS & CYLINDRICAL SIDE PIECES HAVE BEEN PLATED & LACQUERED/ BOX IS STAINED; RED VELVET LINING COVERS SOME AREAS INSIDE BOX
Decoration
N/A

CITE THIS OBJECT

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

Fauth Co., Spherometer, circa 1885, Artifact no. 1966.0436, Ingenium – Canada’s Museums of Science and Innovation, http://collection.ingeniumcanada.org/en/id/1966.0436.001/

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