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This apparatus consists of an arm restrainer, a pulley system, and a marker for a kymograph attached along the length of a wooden base. The components of the restrainer are made of brass, steel, and leather. The arm restrainer consists of two parallel metal poles elevated on a stand at each end. There is a pulley at the end of the wooden base opposite the arm restrainer. A wire extends from the end of the arm restrainer to the pulley. The kymograph stylus is attached to the top of the arm restrainer perpendicular to the length of the wooden base and restrainer.

Accession Number: 2011.psy.13

Alternative Name:

Primary Materials: Wood, Wire, Leather, Brass


Label on the side of the wooden base: ‘PROPERTY OF UNIVERSITY OF TORONTO’

Dimensions (cm): Height = 15, Width = 11.5, Length = 51


Used for measuring changes in the amount of muscular contractions. It immobilizes all parts of a member except for the one measured.


Poor condition; Leather is falling apart; Missing the pulley, peeled label on top of stand, the marker for the kymograph is bent.

Associated Instruments: 2011.psy.11; 2011.psy.12, 2011.psy.18


Date of Manufacture:


Dept of Psychology, U of T. Removed from Psych storage Sept 28, 2011.

Additional Information and References:

Historical Notes: