General Information

Serial #

4254

Part Number

1

Total Parts

4

AKA

N/A

Patents

N/A

General Description

.1 BRONZE, STEEL AND ALUMINUM, AND POSSIBLY OTHER METALS; GLASS..2 PROBABLY BRONZE; PLATED..3 LEATHER CASE HAS CHAMOIS (?) LINING; METAL BUCKLES..4 TRIPOD HAS SLIDING WOODEN LEGS; METAL FITTINGS; METAL COVER FOR TRIPOD HEAD

Dimensions

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

Length

23.3 cm

Width

12.0 cm

Height

11.5 cm

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Exploration and Survey

Category

Measurement-distance

Sub-Category

N/A

Manufacturer

AKA

Watts

Country

England

State/Province

Unknown

City

London

Context

Country

Canada

State/Province

Unknown

Period

THIS TACHEOMETER NOT USED AFTER 1960: ACTUAL PERIOD OF USE IS UNKNOWN.

Canada

THIS TACHEOMETER POSSIBLY USED BY GEODETIC SURVEY DIVISION, GEOLOGICAL SURVEY OF CANADA, FIOR THE REVISION OF THE ONE INCH SERIES (MAPPING SURVEYS).

Function

TO MEASURE DISTANCE, AND BOTH HORIZONTAL AND VERTICAL ANGLES.

Technical

EXAMPLE OF VERY SIMPLE TACHEOMETER, HAVING A VERTICAL ARC DIVIDED -40 TO 0 TO 40+ (GRADUATED IN SINGLE DEGREES), AND READ WITH A VERNIER, AND A COMPASS DIVIDED 0-360 (GRADUATED TO SINGLE DEGREES). TELESCOPE PRESENTS INVERTED IMAGE. TUBE LEVEL ON VERTICAL ARC READ BY MIRROR; BULL'S EYE LEVEL FITTED ON OPPOSITE STANDARD.

Area Notes

Unknown

Details

Markings

.1 " LONDON. Eng./ E.R. WATTS & SON/ OTTAWA & WINNIPEG " and " 4254 " incised on compass face. Eight point of compass incised on face; compass circle divided 0-360, by single degrees, and labelled at 10-degree intervals..2 "10" incised on tangent screw and inside threaded receptacle of tacheometer; "13" crudely incised on outside of fitting..3 case stamped " E.R. WATTS & SON/ LONDON ENG./ OTTAWA & WINNIPEG " ON FRONT OF LID; " [illegible]/ Telemeter 21 " crudely stamped into top of lid; "41" clearly stamped, below. "41" handwritten in pencil on one end panel of case..4 &.4PT no markings apparent.

Missing

PRISM TO READ COMPASS IS MISSING. SMALL SCREW ON OBJECTIVE LENS HOUSING MISSING(POSSIBLY USED TO SECURE SLIDING COVER).

Finish

.1 SOME BRIGHT LACQUERING ON OBJCTIVE LENS SHADE, FINE ADJUSMENT SCREWS, ETC. ALUMINUM CASING SURROUNDS COMPASS..2 BRIGHT LACQUERED FINISH.3 RED-BROWN LEATHER CASE HAS OFF-WHITE CHAMOIS PADDED LINING..4 NATURAL WOOD FINISH; SOME METAL FITTINGS HAVE BEEN DARKENED. SILVER METAL CAP SCREWS ONTO TRIPOD HEAD (PROBABLY TO PROTECT THREADS).

Decoration

N/A