Chronograph

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Ingenium, 1990.0279.001
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OBJECT TYPE
RECORDING/DRUM
DATE
1930–1960
ARTIFACT NUMBER
1990.0279.001
MANUFACTURER
Bausch & Lomb
MODEL
Unknown
LOCATION
Rochester, New York, United States of America

More Information


General Information

Serial #
10443
Part Number
1
Total Parts
9
AKA
N/A
Patents
N/A
General Description
ALL METAL CONSTRUCTION, INCLUDING BRASS, ALUMINUM, AND POSSIBLY CAST IRON. RUBBER COVERING ON WIRES. COTTON CANVAS BAG & WOODEN BOX ARE PTS. PAPER SHEET SECURED ON RECORDING DRUM..9 LEAD WEIGHT INSIDE BRASS CASING.

Dimensions

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

Length
41.2 cm
Width
18.5 cm
Height
22.0 cm
Thickness
N/A
Weight
N/A
Diameter
N/A
Volume
N/A

Lexicon

Group
Exploration and Survey
Category
Measurement-position
Sub-Category
N/A

Manufacturer

AKA
Bausch Lomb
Country
United States of America
State/Province
New York
City
Rochester

Context

Country
Canada
State/Province
Unknown
Period
THIS TYPE OF INSTRUMENT USED C.1930S-1970S AND POSSIBLY LATER.
Canada
USED BY GEODETIC SURVEY OF CANADA, PRESUMABLY ON LAND SURVEYS. RECORDS OF A SIGNAL GIVEN BY A CHRONOMETER (POSS.900278) AT PRECISE INTERVALS COULD BE RECORDED ON THE CHRONOGRAPH AND COMPARED WITH CELESTIAL OBSERVATIONS TO ESTABLISH POSITION OR CALCULATE DISTANCE (REF.2, P.27)
Function
TO MEASURE SHORT INTERVALS OF TIME AND RECORD THESE INTERVALS ON PAPER
Technical
EXAMPLE OF A RECORDING CHRONOGRAPH. TYPICALLY, A SHEET OF PAPER IS DRAWN UNIFORMLY BENEATH A PAIR OF RECORDING PENS, ONE OF WHICH IS DEFLECTED BY MEANS OF AN ELECTRO-MAGNET AT THE INSTANT TO BE DETERMINED OR AT THE BEGINNING OR END OF THE INTERVAL TO BE MEASURED. THE OTHER PEN IS OPERATED AT REGULAR INTERVALS BY MEANS OF SIGNALS TRANSMITTED FROM A CLOCK AND SO MARKS A TIME SCALE ON THE RECORD (REF.1, P.75).
Area Notes
Unknown

Details

Markings
.1 STAMPED ON SQUARE BASE OF GOVERNOR HOUSING 'BAUSCH & LOMB OPTICAL CO./ ROCHESTER, N.Y./ [LOGO - INVERTED TRIANGLE CONTAINING 'B-L/ Z S]'; '10443' STAMPED BELOW/ '62' HANDPAINTED IN RED ON BASE/ '4' STAMPED IN BRASS PULLEY WHEELS AND WEIGHT ARMS/ '62' HANDWRITTEN IN BLACK MARKER ON CASE/ PAPER LABEL STAPLED TO CASE LID READS: 'ASTRONOMICAL/ INSTRUMENT/ WITH CARE'/.2 '2' STAMPED ON GEARED WHEEL & END CAP
Missing
UNKNOWN
Finish
.1 BLACK WRINKLE-FINISH APPLIED TO BASE & DRUM SUPPORTS. SILVER METAL GOVERNOR HOUSING HAS THIN BRASS-COLOURED WASH APPLIED AS FINISH; GOVERNOR WEIGHTS, ENDPOSTS & CROSSPIECE, GEARS & TURNED ROD & SOME PIECES ON ELECTRO-MAGNET (.3) HAVE LACQUERED BRASS FINISH. LINK CHAIN & HANGING PULLEYS ALSO HAVE LACQUERED BRASS FINISH..2 DRUM ORIGINALLY HAD PAINTED GREY ENAMEL FINISH. BUFF COLOURED CANVAS BAG. BOX EXTERIOR PAINTED GREEN.
Decoration
N/A

CITE THIS OBJECT

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

Bausch & Lomb, Chronograph, circa 1930–1960, Artifact no. 1990.0279, Ingenium – Canada’s Museums of Science and Innovation, http://collection.ingeniumcanada.org/en/id/1990.0279.001/

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