Device for determining the speed, distance traversed, elapsed time and calories expended by a person while running
US4578769A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 9, 1983 |
| Grant date | Mar 25, 1986 |
| Priority date | — |
| Expiry date | Feb 9, 2003 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA63B2225/50
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A device for measuring the speed of a person while running along a surface is disclosed. A pressure switch or transducer located in a shoe senses when a foot of the runner is in contact with the surface and produces a foot contact signal having a duration proportional to the time the foot is in contact with the surface. A radio frequency transmitter is coupled to the pressure switch or transducer and transmits the foot contact signal. A radio frequency transmitter receives the foot contact signal transmitted by the frequency transmitter and a microprocessor coupled to the radio frequency receiver calculates, solely from the foot contact signal, an output speed signal representing the speed of the runner. A liquid crystal display coupled to the output of the microprocessor displays the speed of the runner in accordance with the output speed signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.