Apparatus for indicating the freezing of the surface of an asphalt road, paved runway, or the like
First Claim
1. Apparatus for indicating the freezing of the surface of an asphalt road, paved runway, or the like, said apparatus comprisinga detecting transmitter device installed in operative proximity with a surface to be observed, said detecting transmitter device including an ultrasonic waveguide installed on the surface to be observed;
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Accused Products
Abstract
A detecting transmitter device installed in operative proximity with a surface to be observed includes an ultrasonic waveguide installed in such surface. Electronic equipment electrically connected to the ultrasonic waveguide transmits ultrasonic waves to the waveguide. The ultrasonic waves proceed in the waveguide. The equipment also receives the ultrasonic waves from the waveguide. The degree of attenuation of the waves in the waveguide depend upon the difference in viscosity and other mechanical properties of water and ice, whereby the detecting transmitter device and the electronic equipment detect freezing of the surface by attenuation of the waves in the waveguide.
158 Citations
9 Claims
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1. Apparatus for indicating the freezing of the surface of an asphalt road, paved runway, or the like, said apparatus comprising
a detecting transmitter device installed in operative proximity with a surface to be observed, said detecting transmitter device including an ultrasonic waveguide installed on the surface to be observed; - and
electronic equipment electrically connected to the ultrasonic waveguide for transmitting ultrasonic waves to said ultrasonic waveguide, said ultrasonic waves proceeding in said waveguide, and receiving said ultrasonic waves from said waveguide, the degree of attenuation of said ultrasonic waves in said waveguide depending upon the difference in viscosity and other mechanical properties of water and ice, whereby said detecting transmitter device and said electronic equipment detect freezing of said surface by attenuation of said ultrasonic waves in said waveguide. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification