Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1991-11-12
1993-05-25
Swann, III, Glen R.
Communications: electrical
Condition responsive indicating system
Specific condition
119 29, 119174, 340567, 367138, 367139, G08B 2100
Patent
active
052144119
ABSTRACT:
An ultrasonic sound emitting apparatus produces an undesireable noise for animals such as dogs and cats to deter such animals from trespassing within certain geographical locations with this noise being of such a high frequency level that it is not heard by most human beings. The apparatus includes a housing with an ultrasonic emitter being mounted within a reflector cone formed within the front face of the housing. The sound emitter is moveable relative to the cone between a projected position and a retracted position and when in the retracted position the pattern of sound emitted is substantially wider than when the emitter is in the projected position. With the emitter in the projected position the pattern of sound emitted is of substantially greater length than the pattern of sound with the emitter in the retracted position. A sensor such as an infrared sensor is to be mounted within the front face of the housing which will cause activation of the emitter only upon an animal being detected.
REFERENCES:
patent: 3517226 (1970-06-01), Jones, Sr.
patent: 4658386 (1987-04-01), Morris
patent: 4689776 (1987-08-01), Thorndyke et al.
patent: 5015994 (1991-05-01), Hoberman et al.
Munro Jack C.
Swann III Glen R.
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