Thermochromic sensor for locating an area of contact

Details Thermochromic sensor for locating an area of contact Thermochromic sensor for locating an area of contact

1994-03-08

1995-03-07

Cuchlinski, Jr., William A.

Signals and indicators

Indicators

Impact type

116207, 116216, 273 31, 2733481, 273 29R, G01K 1112, F41J 500, A63C 1906

Patent

active

053948246

ABSTRACT:
A thermochromic sensor for locating the area of contact between two surfaces moving in relation to each other, has applications in boundary line officiating and other situations where the location of the area of contact is important. For tennis and similar sports, thermochromic sensors are placed along boundary lines. The thermochromic sensors can be formed with thermochromic liquid crystals, which change color in the area of contact, thereby accurately indicating where a ball contacted the court. The color change can be used to characterize the speed of the impact. A temperature controller can be built into the sensor or placed near the sensor to maintain the temperature of the sensor near the sensor trigger point--the point at which a color change will occur on contact.

REFERENCES:
patent: Re32842 (1989-01-01), Wigoda
patent: 3617374 (1971-11-01), Hodson et al.
patent: 4410283 (1983-10-01), Dubois et al.
patent: 4433637 (1984-02-01), Buirley et al.
patent: 5242830 (1993-09-01), Argy et al.

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