Speed indicating apparatus
First Claim
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1. Apparatus for measuring the movement rates of an athlete, comprising in combination:
- a support assembly conformed for a restrained positioning upon a ground surface;
a spool mounted for rotation on said support assembly including a flexible tether wound thereon conformed for attachment of the free end thereof to said athlete;
magnetized means attached to said spool for movement according to the rotation thereof;
sensing means mounted on said support assembly for deploying an inductive coil adjacent the movement of said magnetized means for producing an induced current indicative of said movement, whereby said induced current in said induction coil imposes an reverse electromotive force on said magnetized means; and
measurement means connected to receive said induced current for providing an indication of the magnitude thereof.
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Abstract
A speed indicating system useful in training an athlete includes a spool on which a tether line is wound with the free end thereof then secured to the body of the athlete, any selected one of the athlete'"'"'s limbs, or any object swung, kicked or thrown by the athlete. The spool includes one or more permanent magnet pieces mounted on its periphery in an alignment adjacent an inductive pickup coil which then communicates the current level induced to a meter indicating the tether line deployment rate. The reverse electromotive force resulting from the inductive coupling is then useful to reduce the inertially driven tether line deployment.
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Citations
14 Claims
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1. Apparatus for measuring the movement rates of an athlete, comprising in combination:
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a support assembly conformed for a restrained positioning upon a ground surface; a spool mounted for rotation on said support assembly including a flexible tether wound thereon conformed for attachment of the free end thereof to said athlete; magnetized means attached to said spool for movement according to the rotation thereof; sensing means mounted on said support assembly for deploying an inductive coil adjacent the movement of said magnetized means for producing an induced current indicative of said movement, whereby said induced current in said induction coil imposes an reverse electromotive force on said magnetized means; and measurement means connected to receive said induced current for providing an indication of the magnitude thereof. - View Dependent Claims (2, 3, 4, 5)
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6. A speed indicating system useful in training athletes, comprising in combination:
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a generally planar supporting base conformed for positioning upon a ground surface including a generally vertical pivot shaft; a spool assembly mounted for rotation about said pivot shaft including a rotary spool carried thereon and having flexible webbing wound thereon; magnetized means attached to said spool for movement with the rotation thereof; and sensing means mounted on said support assembly for deploying an inductive coil adjacent the movement of said magnetized means for producing an induced current indicative of said movement, whereby said induced current in said induction coil imposes an reverse electromotive force on said magnetized means. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14)
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Specification