초록 ▼

A training apparatus for improving the performance of a swimmer. In a first aspect of the invention, a propeller rotates about an axis which is aligned with the path of the swimmer. A permanent magnet driven by the propeller attached to the swimmer produces a rotating magnetic field which acts on a

A training apparatus for improving the performance of a swimmer. In a first aspect of the invention, a propeller rotates about an axis which is aligned with the path of the swimmer. A permanent magnet driven by the propeller attached to the swimmer produces a rotating magnetic field which acts on a magnetic field transducer to produce a pulsating signal whose frequency varies directly with the swimmer\s speed. The sensor\s output is multiplied, amplified and fed to an earphone worn by the swimmer. Changes in frequency immediately inform the swimmer of whether his performance has improved or deteriorated. In a second aspect of the invention, permanent magnets are mounted on vanes of an impeller which rotate about a horizontal axis which is at right angles to the path of the swimmer. Rotating magnetic fields of the permanent magnets act on a magnetic field sensor to produce a pulsating signal whose frequency varies with the swimmer\s speed.

대표청구항 ▼

A swimmer\s training apparatus comprising: a compact module, said module having a rotatable member arranged to be rotated about an axis by a forward motion of said swimmer, at least one permanent magnet arranged to be rotated by said rotatable member, said permanent magnet having a north pole spaced

A swimmer\s training apparatus comprising: a compact module, said module having a rotatable member arranged to be rotated about an axis by a forward motion of said swimmer, at least one permanent magnet arranged to be rotated by said rotatable member, said permanent magnet having a north pole spaced apart from a said rotational axis of said rotatable member and a south pole spaced apart from said rotational axis of said rotatable member for generating a rotating magnetic field, at least one magnetic field sensor positioned within said rotating magnetic field for producing a voltage signal during each revolution of said rotatable member, and a means for converting said sensor signal into a pulsating audio output signal which is effective in informing said swimmer of changes in his speed; an earphone operatively connected to said output signal of said module for informing said swimmer if a change in said swimmer\s form or movement has increased or decreased said swimmer\s speed.