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Ingenium, 1986.0192.001
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OBJECT TYPE: THEODOLITE/SURVEYOR'S/PORTABLE
DATE: 1912–1914
ARTIFACT NUMBER: 1986.0192.001

MANUFACTURER: Cooke, T. & Sons Ltd.
MODEL: D.L.S.
LOCATION: London & York, England

More Information

General Information

Serial #: 14020
Part Number: 1
Total Parts: 13
AKA: N/A
Patents: N/A
General Description: WOODEN CARRYING BOX WITH LEATHER COVER AND CARRY- ING STRAP/ METAL STRAP BUCKLE/ CANVAS BAG/ BRASS TRANSIT; GLASS BALANCING VIALS.

Dimensions

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

Length: 48.0 cm
Width: 21.9 cm
Height: 19.8 cm
Thickness: N/A
Weight: N/A
Diameter: N/A
Volume: N/A

Lexicon

Group: Exploration and Survey
Category: Measurement-angles
Sub-Category: N/A

Manufacturer

AKA: Cooke
Country: England
State/Province: Unknown
City: London & York

Context

Country: Canada
State/Province: Unknown
Period: THIS INSTRUMENT USED C. 1913- 1930S, AND POSSIBLY LATER.
Canada: D.L.S. PATTERN INSTRUMENTS DENOTE THOSE DESIGNED SPECIFICALLY FOR USE BY DOMINION LAND SURVEYORS.
Function: TRANSITS FITTED WITH BOTH A HORIZONTAL CIRCLE AND VERTICAL CIRCLE OR ARC MAY BE USED TO MEASURE BOTH HORIZONTAL AND VERTICAL ANGLES.
Technical: INSTRUMENT READS TO 10 MINUTES OF ARC.
Area Notes: Unknown

Details

Markings: .1: SMALL RECTANGULAR PLATE SCREWED TO BOX TOP: 'THE HUGHES OWENS CO., Ltd./ SOLE AGENTS/ MONTREAL, TORONTO, OTTAWA, WINNIPEG'./ Label on inside of box bears following info.: ‘RULE FOR OBSERVATIONS WITH STADIA LINES/ THE observed distances read off by this instrument/ are all necessarily measured from a point in/ advance of the object glass by a distance equal to/ the focal length of the latter. Hence, in order to/ correct the distances to the centre of the instrument,/ a constant has to be added to the observed distances,/ which is equal to the principal focal length plus the/ distance from the objective to the centre of the/ instrument./ In this case, the constant is 10"1/4 x 6'"3/4/ or 17"./.3: FOLLOWING INFO. INSCRIBED ON BASE: 'T. COOKE & SONS LTD./ LONDON & YORK/ NO. 14020/ logo/ THE ONTARIO HUGHES OWENS CO. LTD./.4: '18' AND 'N' INCISED ON EYEPIECE
Missing: PLUMB BOB MISSING. CROSS-HAIRS IN SPARE DIAPHRAGM BROKEN. TELESCOPIC COMPASS DAMAGED.
Finish: TRANSIT IS PAINTED BLACK/ LEVELLING SCREWS BRASS-PLATED/ LEATHER COVERED CARRYING CASE.
Decoration: N/A

CITE THIS OBJECT

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

Cooke, T. & Sons Ltd., Transit, circa 1912–1914, Artifact no. 1986.0192, Ingenium – Canada’s Museums of Science and Innovation, http://collection.ingeniumcanada.org/en/id/1986.0192.001/

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