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| Temperature indicator |
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| Toilet training system |
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| Urine shield for toilets |
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| Label or wrapper with premium |
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| Power supply apparatus for slide door in motor vehicle |
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| Multiple beam playground apparatus |
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| Elastic action game device |
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Athletic timer correction system
| Details |
Inventors: Luerker, Dean; Mitchell, David E.;
Assignee:
Primary Examiner: Heyman; John S.
Assistant Examiner:
Attorney, Agent or Firm: Baker & Daniels
A swim/sporting event timer/counter times a athlete moveing along a predetermined path based on signals received from the athlete. A time counter begins when movement of the athlete is detected. Based upon the amount of time it takes for the athlete to pass by the timing system, the time counter is automatically adjusted, if necessary, to account for the time counter having been started at an incorrect time. |
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DETAILED DESCRIPTION As shown in FIG.
1, one embodiment of the invention comprises a translucent, submersible housing 11 that includes a waterproof lid 12 sealed by a gasket (not shown).
Housing 11 contains an internal power source such as a rechargable six volt lead acid battery 13 and electronic components 14.
On the top of lid 12 are positioned three upwardly projecting seven segment LCD displays 15, 16 and 17 and first and second receivers 18 and 19.
Also mounted near the top of lid 12 are water temperature sensor 43 and first, second and third magnetic reed switches 30, 31 and 32, which may be actuated by a magnet passed in proximity thereto.
In the preferred embodiment, the device is used by a swimmer wearing a battery powered ultrasonic transmitter 24.
As shown in FIG.
2, transmitter 24 may be attached to a transmitter housing 21 which may be secured to the swimmer by strap 22 and buckle 23.
Transmitter 24 is tuned to the same frequency as receivers 18 and 19, preferably transmits in the frequency range of 20 KHz to 455 KHz, and emits a 4 millisecond pulse every 40 milliseconds.
The transmitter is preferably activated by a MOSFET transistor having a gate forward-biased by two terminals exposed to the exterior of the housing so as to be automatically turned on by the change of conductivity when the water is entered, as shown in FIG.
7h.
To use the device, the swimmer then places counter housing 11 underwater approximately ten feet from the starting end of the pool lane, as shown in FIG.
5, and activates the device by passing a magnet in proximity to on/off magnetic reed switch 32.
The swimmer should stand on the side of the device closest to the starting wall.
The device has five operating modes: swim-session, display-data, serial-out, clear-sessions and display temperature.
When the device is first turned on, it automatically enters the Swim-session mode.
In this mode, the device will sense the pulsing signals from the transmitter worn by the swimmer to determine the direction of the swimmer, and hence, the starting wall
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Exercise Devices2 
