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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 at a perpendicular angle to the length of the wooden base and restrainer.

Accession Number: 2011.psy.18

Alternative Name:

Primary Materials: Wood, Leather, Brass


Tape on the side of the wooden base with pen markings ‘1 mvs’

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


Intended to isolate a particular muscle group (arm and fingers) and measure changes in the rate of muscle contraction.

Condition: Good: Leather is disintegrating.

Associated Instruments: 2011.psy.11; 2011.psy.12; 2011.psy.13


Date of Manufacture:


Dept of Psychology, U of T, removed from Psych storage October 5th, 2011.

Additional Information and References:

Historical Notes: