General Information

Serial #

N/A

Part Number

1

Total Parts

4

AKA

N/A

Patents

N/A

General Description

.1-.2 WOOD, WITH METAL & GLASS COMPONENTS; REMNANTS OF LEATHER STRAPS/.3 HEADPHONES HAVE METAL AND SYNTHETIC COMPONENTS; FABRIC COVERING ON WIRES/.4 WOODEN CASE HAS METAL FITTINGS & LEATHER CARRYING HANDLE

Dimensions

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

Length

46.0 cm

Width

9.0 cm

Height

38.0 cm

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Mining and Metallurgy

Category

Mineral exploration

Sub-Category

N/A

Manufacturer

AKA

Fisher

Country

United States of America

State/Province

California

City

Palo Alto

Context

Country

North America

State/Province

Unknown

Period

THIS TYPE OF INSTRUMENT USED C. 1930S+.

Canada

SIMPLE, PORATABLE DEVICE OF TYPE USED BY CANADIAN PROSPECTORS AND OTHERS INVESTIGATING MINING CLAIMS OR OPTIONS. DONATED TO NMST BY CANADIAN NATIONAL EXHIBITION ARCHIVES, TORONTO: SPECIFIC ORIGINS AND HISTORY OF USE UNKNOWN.

Function

TO LOCATE ORE-BODIES OR BURIED METAL OBJECTS LOCATED AT A DEPTH OF UP TO 30 FEET.

Technical

EXAMPLE OF EARLY PORTABLE DEVICE DESIGNED FOR USE BYPROSPECTORS OR FOR SOMEONE SEEKING METAL ORE BODIES OR BURIED METAL OBJECTS. THE MACHINE CAN BE CALIBRATED BEFORE USE SO THAT QUANTITATIVE MEASUREMENTS MAY BE MADE. IT'S COIL SENSING MECHANISM IS MUCH LIKE THAT USED IN MODERN METAL DETECTORS. (REF. 1)

Area Notes

Unknown

Details

Markings

.1 " M- SCOPE/ FISHER RESEARCH LAB./ MODEL 25-S/ P-6657 " & scale graduated 100 to 0, in single increments, marked on face of uppermost meter; " PAT. NO. 2,051,399 SIMPSON ELECTRIC CO. CHICAGO, ILL. U.S.A. " printed along upper edge of meter face. " D.C./ VOLTS/ READRITE/ METER/ WORKS/ MADE IN U.S.A./ BLUFFTON/ OHIO/ U.S.A. " printed on front of lower meter/.2 no markings/.3 " PAT. APLD/ FOR " incised on brackets connecting headphones to head band/.4 " FRAGILE/ HANDLE/ WITH/ CARE " handpainted on all side of carrying case.

Missing

.2 RECEIVER MISING METER; WOODEN CARRYING STRUTS MISING. From CA of 12/13/2001 by David Daley: No - Complete

Finish

.1-.2 STAINED & VARNISHED WOODEN CASES/.2 PLYWOOD CASE IS PAINTED ON ALL EXTERIOR SURFACES.

Decoration

.4 CARRYING CASE PAINTED BLACK, WITH GOLDTONE BORDER AND CROSS-BANDING; HANDPAINTED TEXT PANELS.