General Information

Serial #

N/A

Part Number

1

Total Parts

3

AKA

N/A

Patents

N/A

General Description

PRIMARILY METAL CONSTRUCTION- MANY PARTS MADE OF BRASS, AND LACQUERED OR GOLD-PLATED. GLASS TUBE LEVEL VIALS & OPTICAL COMPONENT. SOME SYNTHETIC PARTS. ROUND BASE POSSIBLY WOOD.

Dimensions

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

Length

42.0 cm

Width

39.0 cm

Height

41.0 cm

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Physics

Category

Geophysics

Sub-Category

N/A

Manufacturer

AKA

Gilbert

Country

Canada

State/Province

Ontario

City

Ottawa

Context

Country

Canada

State/Province

Ontario

Period

THIS GRAVITY METER WAS DEV'T DURING THE 1960S. IT IS UNKNOWN WHETHER THIS INSTRUMENT WAS EVER USED, MFD. ETC

Canada

DEVELOPED IN CANADA BY STAFF OF DOMINION OBSERVATORY, OTTAWA. IT IS BELIEVED MR. REG. GILBERT WAS INDIVIDUAL MOST INVOLVED IN DESIGN AND CONSTRUCTION OF THIS INSTRUMENT.

Function

TO MEASURE CHANGES IN GRAVITY ON BOARD CRUISING VESSELS AT SEA.

Technical

INITIALLY DEVELOPED FOR USE IN MEASURING GRAVITY AT SEA. TESTING OF LINEAR GRAVIMETERSDEMONSTRATED THEIR SUPERIORITY AS SEA GRAVIMETERS (C.1966). LATER DEV'T & TESTING OF V-STRING INST. FOCUSED ON USE AS BORE-HOLE GRAVIMETER, & AS TILTMETER FOR MEASUREMENT OF VERTICAL DEFLECTIONS OF EARTH'S SURFACE (REF.1, P.145)

Area Notes

Unknown

Details

Markings

FEW MARKINGS ON ANY DISTINCT PIECES. TWO DOUBLE-WINDOW TUBE LEVELS MOUNTED ON CIRCULAR BASE ARE GRADUATED & LABELLED '1 DIV=30"'. EACH LEVEL FITTED WITH LEVELLING ADJUSTMENT SCREW LABELLED '1 DIV= 1 MIN'; VERTICAL SCALE GRADUTED 0-10 BY SINGLE DIVISIONS, AND LABELLED 'DEGREES'./ TWO SINGLE-WINDOW TUBE LEVELS ON CYLINDRICAL COIL COMPONENT ARE GRADUATED & LABELLED '1 DIV=45"'. EYEPIECE CASING INCISED 'PARR INSTRUMENT CO./ MOLINE, ILL. U.S.A.'

Missing

MANY PARTS MISSING, INCLUDING MOUNTING FOR VIBRATING RIBBON. ELECTRICAL COMPONENTS ALSO KNOWN TO BE MISSING. From CA of 02/01/2002 by Matthew Bruce: Yes - parts known to be missing

Finish

MANY COMPONENTS, INCLUDING INSIDE OF COIL CYLINDER, AND SMALL MACHINED CONTACT-FITTINGS ARE GOLD-PLATED. LARGE ROUND BASE & LEVEL CASINGS ON BASE HAVE BLACK-BROWN FINISH.

Decoration

N/A