Galvanometer

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Ingenium, 1969.0609.001
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OBJECT TYPE: DIFFERENTIAL/HORIZONTAL/MOVING IRON
DATE: 1915
ARTIFACT NUMBER: 1969.0609.001

MANUFACTURER: Bunnell, J.H. & Co.
MODEL: Unknown
LOCATION: New York, New York, United States of America

More Information

General Information

Serial #: N/A
Part Number: 1
Total Parts: 1
AKA: N/A
Patents: N/A
General Description: EBONITE BASE/ BRASS FACE CASING, LEVELLING KNOBS &TERMINALS/ METAL SCALE & MANUFACTURER'S PLATE/ COPPER STRIP/ GLASS

Dimensions

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

Length: N/A
Width: 20.5 cm
Height: 8.0 cm
Thickness: N/A
Weight: N/A
Diameter: N/A
Volume: N/A

Lexicon

Group: Communications
Category: Telegraphy
Sub-Category: N/A

Manufacturer

AKA: Bunnell
Country: United States of America
State/Province: New York
City: New York

Context

Country: Unknown
State/Province: Unknown
Period: CIRCA 1885
Canada: ARTIFACT WAS USED AT AND DONATED BY THE NATIONAL RESEARCH COUNCIL.
Function: AN INSTRUMENT FOR DETECTING OR MEASURING A SMALL ELECTRICAL CURRENT BYMOVEMENTS OF A POINTER
Technical: MOVING IRON GALVANOMETERS WERE 1ST DISCUSSED BY G.C. PAGE (1845) BUT DIDN'T TAKE OFF COMMERCIALLY 'TIL 1880S. IDEA IS SIMILAR INPRINCIPLE TO MARCEL DEPREZ'S "FISHBONE GALVANOMETER". A PIECE OF SOFT IRON WAS PUT IN A SOLENOID COIL BETWEEN POLES OF A POWERFUL PERMANENT MAGNET. (SEE COMPLETE WS IN S.I. & O:DRIVE S.I.)
Area Notes: Unknown

Details

Markings: ON FACE: GRADUATED SCALES; TOP: '100 TO 0' & '0 TO 100'; BOTTOM: '90 TO 0' & '0 TO 90'/ MANUFACTURER'S PLATE: '0.50.200 OHMS/ J.H. BUNNEL & CO./NEW YORK'.
Missing: N/A
Finish: Unknown
Decoration: INCISED BLACK MARKINGS FOR SCALE & MANUFACTURER'S INFORMATION

CITE THIS OBJECT

If you choose to share our information about this collection object, please cite:

Bunnell, J.H. & Co., Galvanometer, circa 1915, Artifact no. 1969.0609, Ingenium – Canada’s Museums of Science and Innovation, http://collection.ingeniumcanada.org/en/id/1969.0609.001/

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