The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 23, 1990
Filed:
Jul. 17, 1989
Charles S Price, Louisville, KY (US);
John O Adams, Crestwood, KY (US);
Other;
Abstract
An electronic animal repellant apparatus includes a microphone for detecting environmental sound, a detection circuit for detecting the presence of a particular species of animal in the vicinity of the repellant apparatus, a timing and activation circuit, and a plurality of animal repellant or frightening devices. The microphone produces an input signal fed to the detection circuit that has a frequency content representative of the frequency spectrum of the environmental sound. The input signal is compared to a pre-determined frequency envelope characteristic of the sound spectrum of the particular animal species and a trigger signal is produced when the presence of the particular animal is detected. The detection circuit includes a band-pass filter and a negative feedback band-reject filter, each having readily removable and replaceable components for changing the pre-determined frequency envelope for different species of animal to be repelled. The trigger signal is provided to the timing and activation circuit which provides signals to activate one or more of the plurality of animal frightening devices. The timing and activation circuit includes circuitry to provide a random delay in activation of the frightening device, a random duration of activation, and a random sequence of activation of more than one of the plurality of devices.