General Information

Serial #

1612

Part Number

1

Total Parts

9

AKA

N/A

Patents

N/A

General Description

CONSTRUCTED PRIMARILY OF METAL, WITH METAL, SYNTHETIC & GLASS COMPONENT PARTS. CANVAS CASES FOR.1 &.5 HAVE METAL CLIPS & BUCKLES, AND LEATHER REINFORCED CORNERS ETC..1 &.5 UNITS ALSO HAVE LEATHER HANDLES.

Dimensions

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

Length

32.0 cm

Width

31.0 cm

Height

35.0 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

TELLUROMETER

Country

South Africa

State/Province

Unknown

City

Cape Town

Context

Country

Canada

State/Province

Unknown

Period

THIS TELLUROMETER EQ. USED FROM 1963 TO C.MID 1970S

Canada

USED BY GEODETIC SURVEY OF CANADA ON SURVEYS CONDUCTED THROUGHOUT CANADA C.1963-1970S. TELLUROMETER TRAVERSES BECAME STANDARD SURVEYING METHOD FOR MAPPING CANADIAN ARCTIC: WITHOUT IT, MAPPING OF NORTH WOULD BE DECADES BEHIND CURRENT STATUS (C. 1990)

Function

TO MEASURE HORIZONTAL DISTANCES BY TIMING THE PASSAGE OF RADIO WAVES

Technical

MRA-3 REPRESENTED SEVERAL IMPORTANT ADVANCES IN TELLUROMETER'S DEVELOPING TECHNOLOGY. AT 35LBS IT WEIGHED LESS THAN HALF OF THE MRA-1. IT FEATURED BUILT-IN POWER PACK & BATTERY UNITS, A SELF-CONTAINED INSTRUMENT PANEL & ANTENNA, AND FULLY TRANSISTORIZED WORKS.

Area Notes

Unknown

Details

Markings

.1 OVAL PLATE SCREWED TO CASING TOP READS: 'MICRO-DISTANCER/ TELLUORMETER/ MADE IN SOUTH AFRICA/ BY:-TELLUROMETER (PTY) LTD. CAPE TOWN' & FEATURES GLOBE & LIGHTNING BOLT LOGO/ DECAL BELOW HANDLE READS: 'PLESSEY/ [LOGO]/ GROUP/ [TELLUROMETER LOGO]/ TELLUROMETER/ CANADA LIMITED/ OTTAWA, CANADA'/ PLATE, ABOVE, READS: 'MODEL MRA 3/ SER. NO. 1476/ MOD. RECORD/ [1-5 & 8-11 FLAGGED]. ALL CONTROLS LABELLED; 'Tellurometer' APPEARS IN RAISED PRINT ON INSTRUMENT PANEL FRONT/ DECAL ON INSIDE COVER LISTS PATENTS- SEE PAT REFERENCES FOR COMPLETE TEXT/ '1476' HANDWRITTEN IN BLACK MARKER ON CASING FRONT/ 'ROANWELL' CAST IN RAISED PRINT ON HEADSET; *

Missing

NONE EVIDENT - APPEARS COMPLETE. .1PT CASE NOT ORIGINAL - BEARS HANDWRITTEN SN '1722', .2 HEADSETS ALSO NOT ORIGINAL - MARKED '#1088'

Finish

.1 &.5 HAVE OLIVE GREEN PEBBLED-TEXTURED CASINGS;.5 HAS SLIGHTLY DARKER, SMOOTHER FINISH & BLACK ANTENNA DOME..1PT &.5PT CASES ARE DRAB-GREEN CANVAS;.2-.6 HEADSETS & BATTERY LEADS PREDOMINANTLY BLACK

Decoration

N/A