General Information

Serial #

N/A

Part Number

1

Total Parts

1

AKA

N/A

Patents

N/A

General Description

ELECTRUM METAL; GLASS CENTRE & MAGNIFYING LENS

Dimensions

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

Length

47.3 cm

Width

29.0 cm

Height

3.8 cm

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Mathematics

Category

Drawing & measuring instruments

Sub-Category

N/A

Manufacturer

AKA

HUGHES OWENS

Country

Canada

State/Province

Québec

City

Montréal

Context

Country

Canada

State/Province

Unknown

Period

THIS TYPE OF PROTRACTOR USED C.1920S-TO PRESENT

Canada

USED BY STAFF OF SURVEY & MAPPING BRANCH, EMR CANADA. THIS INSTRUMENT MAY HAVE BEEN MFD. BY, AND WAS DISTRIBUTED BY, HUGHES-OWENS, A CANADIAN CO.

Function

USED TO MEASURE AND DRAW ANGLES WITH PRECISION

Technical

FIRST PROTRACTING INSTRUMENTS, FORMED AS ACIRCLE OR SEMI-CIRCLE WITH THE ARC GRADUATED INTO 360 DEGREES OR 180 DEGREES RESPECTIVELY, APPEARED IN 16TH C. LARGER PROTRACTORS WITH A RADIUS OR PROTRACTING ARM WERE MORE COMMON C.1750+, AND OFTEN INCLUDED A VERNIER SCALE WHICH ENABLED DETAILED MEASUREMENT TO BE TAKEN TO NEAREST MINUTE OF ARC.

Area Notes

Unknown

Details

Markings

'HUGHES OWENS LTD./ MONTREAL & WINNIPEG' INCISED ON ARM/ CIRCLE DIVIDED 0-360, IN BOTH DIRECTIONS, AT 15-MINUTE INTERVALS; VERNIER DIVIDED 15-0-15, READING TO 1-MINUTE OF ARC/ PT CASE STAMPED 'K/Co' IN LOWER RIGHT CORNER OF CASE TOP. PLATE MOUNTED INSIDE LID READS: 'The Hughes, Owens Co., Ltd./ MONTREAL WINNIPEG/ TORONTO OTTAWA VANCOUVER'/ HANDWRITTEN ON MASKING TAPE LABEL APPLIED TO CASE TOP: '...[?] WIGHT.'

Missing

NONE

Finish

DULL, SMOOTH SILVER METAL FINISH. SOME BLUEING OF SET SCREWS ON COLLAR CLIP & ON MAGNIFIER MOUNTING. PT CASE IS WOOD: EXTERIOR COVERED WITH BLACK WOVEN-TEXTURED IMITATION LEATHER; PADDED & LINED WITH BLUE VELVET

Decoration

N/A