coil
Inventory NumberRS0897
ClassificationCoil
Subject
Maker
William J. Murdock Company
1896 - 1985
User
Cruft Laboratory, Harvard University
founded 1914
Maker
General Radio Company
1915-present
Cultural Region
Place of Origin
Place of Use
Dimensions7 x 19 x 26 cm, 2 lb. (2 3/4 x 7 1/2 x 10 1/4 in., 0.9 kg)
Material
Accessories2 metal discs.
DescriptionCoil mounted on rectangular wooden base with black paint partially flaked off. Cracked.
In Collection(s)
Signedplate on base: WM.J. MURDOCK CO. / CHELSEA, MASS.
FunctionThe frequency of transmission or reception of a radio circuit is inversely proportional to the square root of both its capacitance and inductance. Tuning coils are one of the methods used to alter a circuit's frequency, by altering the circuit's inductance.
This coil was most likely used in accordance with either radio transmittance or radio reception.
This coil was most likely used in accordance with either radio transmittance or radio reception.
ProvenanceFrom the Cruft Laboratory, Harvard University.
Historical AttributesCruft
William J. Murdock Company
Date: 1910-1950
Object number: RS0163
J. H. Steward Ltd
Date: circa 1925
Accessories: wooden case; friction discs (4); pulleys (2); small metallic case; key; tube
Object number: DW0541a
William J. Murdock Company
Date: 1910-1950
Object number: RS0163a
VEB Carl Zeiss Jena
Date: circa 1960
Accessories: condenser turret; colored glass filters (3); clear matte glasses (2); polaroid discs (2); stage clips (4); wrenches (2); empty objective can; extra lids (2); case.
Object number: 1997-1-0009
Bernard Davis
Date: circa 1869
Accessories: telescope / microscope eyepiece; microscope objective; solar telescope eyepiece; glass discs (4); horizontal case
Object number: 1254
Japanese
Date: circa 1910
Accessories: Circular metal case with push-on cover (which may not have any original connection with sundial). There is a colored picture of a shepherd and a flock of sheep on a paper inserted inside the lid and two loose red paper discs.
Object number: 7979
H Hughes & Son
Date: ca. 1890-1903
Accessories: 2 plastic (celluloid?) circular discs, pin tool; telescope; leather strap; pencil; 2 erasers; peep sight; eye shade; extra screws
Object number: 5318