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Electrically-Driven Tuning Fork


A black shiny rectangular metal base coated in enamel. There is a cylinder at one end which holds the base of a tuning fork in a horizontal position parallel to the base. There are two electrical leads attached to the base, one to each side of the cylinder. The manufacturer’s label is attached to the base next to the leads. A cylindrical electromagnet with green wire wrapped around the coil is positioned next to the tines of the tuning fork to keep the tuning fork in motion when the device is activated. Tuning fork is marked “C1 256”.

Accession Number: 2011.psy.38

Alternative Name: Chronographic Electrical Fork

Primary Materials: Metal, steel, cord


The manufacturer’s label on base reads “Central Scientific Co.; Laboratory Apparatus; Supplies Chemicals; Trade Mark Cenco Reg. US Patent Office; Chicago, USA; New York – Boston – Toronto – Los Angeles”

Dimensions (cm): Height = 9.5, Width = 24, Length = 9.5


Marks time by oscillating at a constant rate. The tuning fork is actuated (set in motion) by an electromagnet.


Good condition; Small patches of enamel worn from black metal base.

Associated Instruments: 2011.psy.39, 43, 44

Manufacturer: Central Scientific Co., Chicago, U.S.A.

Date of Manufacture:


Dept. of Psychology, University of Toronto

Additional Information and References:

Historical Notes: