Speedometer for in-line skates

Details Speedometer for in-line skates Speedometer for in-line skates

1995-10-10

1998-02-24

Hofsass, Jeffery

Communications: electrical

Continuously variable indicating

With particular transmitter

34087005, 34087028, 324166, 235 95R, 377 242, G08C 1900

Patent

active

057215391

ABSTRACT:
An in-line roller skate includes a transducer portion capable of sensing the rotary movement of at least one wheel on the roller skate and transmitting information concerning the same to a receiver worn on a user's wrist. In the preferred embodiment, the transducer portion includes a magnet attached to one of the plurality of wheels and a sensor positioned in a shoe portion to detect the magnet and produce electrical pulses containing information corresponding to the angular velocity of the wheel. The transducer portion also includes a micro-controller, a transmitter and an antenna. The micro-controller creates a digital data stream containing information corresponding to the angular velocity of the wheel, which is then modulated onto a carrier wave produced by the transmitter. The transmitter transmits the coded signals to the receiver. The receiver demodulates the carrier wave, reproducing the digital data stream. A microprocessor processes the modulated signals and drives the display to produce a real time visual representation of selected portions of information contained in the digital data stream, including speed and distance travelled by the skate.

REFERENCES:
patent: 4454411 (1984-06-01), Hale et al.
patent: 4546650 (1985-10-01), Cameron
patent: 4780864 (1988-10-01), Houlihan
patent: 5170161 (1992-12-01), Sakurai
patent: 5177432 (1993-01-01), Waterhouse et al.

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