Device for the electromagnetic transmission of an event taking place in an interference-laden environment
US4604621A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 9, 1984 |
| Grant date | Aug 5, 1986 |
| Priority date | — |
| Expiry date | May 9, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04F8/08
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The electromagnetic transmission in an interference-laden environment of events defined by the time of their occurrence is accomplished by repeatedly generating, at equal intervals after occurrence of the event, signals representing the occurrence of the event. An event which must be defined by the time t.sub.e at which it occurs triggers a switch which in turn triggers a time base whose signal is sent to a counter. The counter produces at its output a sequence of pulses which are coded in a coder. The code indicates for each pulse the deviation in time .DELTA.T.sub.i which separates it from the time at which the event occurred. The sequence of pulses is sent electromagnetically to a receiver via a transmitter. The first interference-free pulse received is processed by a decoder which provides the value .DELTA.T.sub.i to an arithmetic unit. The arithmetic unit subtracts the value .DELTA.T.sub.i from the time of day t.sub.h to obtain the time of day t.sub.e of the event. The device is applicable in particular to the timing of sporting events.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.