General Information

Serial #

23 (.1)

Part Number

1

Total Parts

6

AKA

N/A

Patents

N/A

General Description

MASTER & REMOTE UNITS PRIMARILY METAL, WITH GLASS & SYNTHETIC COMPONENT PARTS; LEATHER CARRYING HANDLES. HANDSETS ARE SYNTHETIC, WITH METAL CANNON CONNECTORS. BATTERY LEADS HAVE METAL & SYNTHETIC COMPONENTS. METAL CASES HAVE LEATHER HANDLES & CARRYING STRAPS. RUBBER OR SYNTHETIC VIEWING HOODS SUPPLIED FOR.1 &.4

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

44.0 cm

Height

45.5 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

TELLUROMETER

Country

South Africa

State/Province

Unknown

City

Cape Town

Context

Country

Canada

State/Province

Unknown

Period

THIS TYPE OF INSTRUMENT USED C.1957 - EARLY 1960S AND POSSIBLY LATER. MRA2 INTRODUCED IN C.1960

Canada

TELLUROMETER QUICKLYEMBRACED BY CANADIAN SURVEYORS, AND USED EXTENSIVELY ON GOV'T SURVEYS THROUGHOUT CANADA. THE USE OF TELLUROMETRY DRASTICALLY REDUCED TIME, LABOUR & COSTS IN SURVEYS CONDUCTED IN THE MOUNTAINOUS AREAS OF THE CANADIAN NORTHWEST AND FAR NORTH. CANADIAN SURVEYORS AMONG FIRST TO USE & ADVOCATE USE OF TELLUR

Function

USED TO MEASURE DISTANCE BY TIMING PASSAGE OF RADIO WAVES SENT FROM MASTER SET AT ONE END OF LINE SURVEYED TO REMOTE SET AT OTHER END, AND SIGNAL RETURNED TO MASTER.

Technical

TELLUROMETER FIRST FULLY PORTABLE INST. CAPABLE OF MEASURING DISTANCES BETWEEN POINTS BY MEANS OF RADIO MICROWAVES. MRA1 OFFERED PRECISE MEASUREMENT FROM 500FT - 35MI, ACCURATE TO 3 PARTS PER MILLION +/- 2". UNLIKE EARLIEST VERSIONS, MRA1 COULD BE USED DAY OR NIGHT, IN FAIR OR FOGGY CONDITIONS.

Area Notes

Unknown

Details

Markings

'M.T 4' STENCILLED IN RED ON UNITTOP. OVAL PLATE WITH GLOBE & LIGHTNING BOLT LOGO AND TEXT: 'MASTER/ TELLUROMETER/ MICRO-DISTANCER/ MODEL M/RA1 - SERIAL NO. MA 23' SCREWED TO TOP. DECAL ON FRONT OF INSTRUMENT PANEL READS: '[LOGO]/ PLESSEY/ [LOGO]/ GROUP/ TELLUROMETER/ CANADA LIMITED/ OTTAWA, CANADA'. ALL CONTROLS LABELLED. 'Se #M23' HANDWRITTEN IN BLACK MARKER ON UNIT FRONT, '73' STAMPED INTO EACH SIDE OF ANTENNA HORN/.1PT CASE HAS COLOURED DECAL ON CASE FRONT MARKED: 'TELLUROMETER/ TRADE/MARK/ [LOGO]/ Micro-Distancer'

Missing

TELLUROMETERS COMPLETE: REQUIRE TRIPODS & BATTERY-PACKS TO OPERATE. FIELD CHECKED DEC. 30, 1969 BY TELLUROMETER & TESTED OPERABLE.

Finish

MASTER & REMOTE UNITS & CARRYING CASES HAVE SMOOTH GREEN FINISH; DARK GREEN & BLACK CONTRASTS. BLACK HANDSETS & VIEWING HOODS ARE BLACK WITH RECESSED CROSS-HATCHED PATTERN ON SLEEVE & RED EDGING ON EYEPIECE END.

Decoration

NONE