Galvanometer

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Ingenium, 1968.0933.001
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OBJECT TYPE
TANGENT
DATE
1885
ARTIFACT NUMBER
1968.0933.001
MANUFACTURER
Greeley, E.S. & 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
BAKELITE BASE & COIL CASE; COPPER MAGNET WIRE COIL; BRASS HARDWARE & METER (COMPASS) FACE; MAGNETIZED STEEL POINTER; GLASS COMPASS WINDOW; SILVER COMPASS CIRCLE.

Dimensions

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

Length
21.7 cm
Width
18.8 cm
Height
22.0 cm
Thickness
N/A
Weight
N/A
Diameter
N/A
Volume
N/A

Lexicon

Group
Communications
Category
Telegraphy
Sub-Category
N/A

Manufacturer

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

Context

Country
Europe
State/Province
Unknown
Period
THIS TYPE OF GALVANOMETER USED C. 1885- 1900.
Canada
Unknown
Function
TO MEASURE THE CURRENT OF AN ELECTRIC CIRCUIT.
Technical
VERY GOOD EXAMPLE OF EARLY ELECTRICAL MEASURING EQ. TANGENT GALVANOMETER SO CALLED BECAUSE THE STRENGTH OF THE CURRENTS, IN PASSING THROUGH THE COIL, WILL PRODUCE THE VARIOUS DEFLECTIONS WHICH ARE DIRECTLY PROPORTIONAL TO THE TANGENTS OF THE ANGLES OF DEFLECTION OF THE NEEDLE. (REF.2 P.348.)
Area Notes
Unknown

Details

Markings
" The E.S. Greeley & Co./ New York " incised on compass face. Compass circle divided 90-0-90 & 100-0-100. Switch blocks labelled " 200/50/10/1/0 " & " 50/00 5/00 1/0". Two sets of blocks labelled "G" & "R", respectively. [Ground & Resistance]
Missing
NIL. ONE SMALL SCREW MISSING FROM ONEBRACKET SUPPORTING COMPASS. ONE SWITCH PIN IS OF DIFFERENT SIZE & FINISH- PRESUMABLY NOT ORIGINAL.
Finish
SHUNT BLOCKS NATURAL BRASS. SWITCH PINS HAVE NATURAL BRASS FINISH WITH BLACK OR BROWN BAKELITE HANDLES. ADJUSTABLE FEET ARE NATURAL BRASS, WITH KNURLED EDGES. CLEAR GLASS WINDOW OVER COMPASS.
Decoration
N/A

CITE THIS OBJECT

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

Greeley, E.S. & Co., Galvanometer, circa 1885, Artifact no. 1968.0933, Ingenium – Canada’s Museums of Science and Innovation, http://collections.ingeniumcanada.org/en/id/1968.0933.001/

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