Measuring and testing – Muscular force
Patent
1975-03-14
1977-08-16
Gill, James J.
Measuring and testing
Muscular force
272128, G01L 502
Patent
active
040417603
ABSTRACT:
An exercise apparatus providing for accommodating resistance while allowing the level of resistance to the exercise force to be varied is provided by the present invention. The exercise apparatus also includes a movable arm for indicating the magnitude of the force exerted by a user of the apparatus. A frictional member is journaled on a rotatable shaft which is rotated by a user of the apparatus. This frictional member is sandwiched between two other members rotatably coupled with the shaft and engageable with the first member to create frictional resistance. Means is provided for moving one of the members a predetermined distance longitudinally of the shaft in the direction of the frictional member and for holding the member in a predetermined longitudinal position to cause it to grip the frictional member with a predetermined force. Centrifugal force responsive structure is also provided and is coupled with the other member which sandwiches the frictional member. The centrifugal force responsive structure is responsive to the speed of rotation of the shaft and is capable of moving the member in the direction of the frictional member for engagement with the latter with increasing force as increases and for withdrawing the sandwiching member from the frictional member as the speed of rotation decreases. The arm for indicating the magnitude of the force exerted by a user of the apparatus is coupled with the frictional member and holds the member against rotation with the shaft while accommodating a limited degree of pivotal movement.
REFERENCES:
patent: 2199955 (1940-05-01), Kruck
patent: 3640530 (1972-02-01), Henson et al.
patent: 3896672 (1975-07-01), Henson et al.
Fisher Milton W.
Henson Glen E.
Ciarlante Anthony V.
Gill James J.
Robar Mini-Gym, Inc.
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