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