A heavy, grey solid metal base (possibly lead). At one end the base has a solid metal mount which holds the base of a tuning fork horizontally, parallel to the base. The outer ends of the tines of the tuning fork each have a small metal cylinder attached to them. An electromagnet with coiled wire is in the middle of the base. The electromagnet itself is positioned vertically between the tines of the tuning fork, but does not touch them. The mount for the electromagnet is on the outer side of the right tine and has three terminals facing outwards.
Accession Number: 2011.psy.43
Alternative Name: Chronographic Electrical Tuning Fork
Primary Materials: Metal
Marking on top of base: “Eberbach & Son Co., Ann Arbour, Michigan, USA” with logo.
Height = 8.5, Width = 28.5, Length = 6.5
Marks time by oscillating at a constant rate. The tuning fork is actuated (set in motion) by an electromagnet.
Associated Instruments: 2011.psy.38, 39, 44
Eberbach & Son Co., Ann Arbour, Michigan, USA.
Date of Manufacture:
Dept. of Psychology, University of Toronto
Additional Information and References: