Abstract: A device for scaring birds thereby aiding in the prevention of crop destruction due to the birds feeding thereon comprises in combination an actuator, such as an air gun which ejects at increased velocity a gaseous stream in a predetermined path, a frame including a target disposed in an impinging relationship to the gaseous stream path so as to be moved between rest and operative positions responsive to the gaseous stream, and a visual scaring member operatively connected to the target for scaring birds, the visual member being reciprocally operable between inactive and active positions in response to the target being moved between the rest and operable position, respectively. According to another embodiment of the present invention, controls are provided for disabling the device during night hours and/or during periods of increased wind velocities which could potentially damage the device.

Abstract: A high intensity ultrasonic sound generator for producing bursts of ultrasonic frequency and a method of controlling vermin and pests by projecting such bursts into a space from which such vermin and pests are desired to be eradicated. The apparatus has a transformerless power supply employing a voltage divider with a low leakage input capacitor and an output capacitor having a significantly larger capacitance than that of the input capacitor, and wherein the load is voltage dependent so that the greater the charge on the output capacitor, the greater the load and, therefore, the output capacitor is prevented from excessively charging. Ultrasound frequency is generated by two astable multivibrators one of which duty cycles the other and means are provided to vary the frequency within each burst and the burst interval.

Abstract: Livestock entering a border zone along a vehicle roadway are deterred by sequentially activated horn, smoke generating and odor emitting devices triggered in response to interruption of one photo-electric beam at that end of the zone from which the cattle enter. Travel of a vehicle through the zone sequentially interrupts the two beams at opposite ends of the zone to reset the deterring apparatus and cancel its operation.

Abstract: A device for generating warning signals consisting of sound waves at frequencies between 14 and 26 kHz, preferably intended to be mounted on a motor vehicle so that the device will be actuated by the wind. The device operates similar to a flue pipe and generates a subatmospheric pressure behind the sharp edge of the flue pipe. The subatmospheric pressure is created by a passage continuing to a resonant chamber, open at its rear end, the passage being larger in cross-section than the resonant chamber. The passage is formed in a body which has substantially the shape of a frustum of a cone and is formed with longitudinal through slots which extend from the passage. With this design, a subatmospheric pressure is generated which excites the pipe to vibrate even in a relatively slow wind.

Abstract: A ground inserted rod supports at its upper end a base having a cup-shaped member in which is loosely received a motor housing. During motor operation an eccentric blade imparts random movement to the motor housing to cause same to impact the cup-shaped member to impart vibratory movement to the ground inserted rod for wave generation. A battery holder provides a self-contained power source such as a low voltage dry cell battery.

Abstract: An energy-pulsating rodent-repelling device designed to discourage rodents, especially of the burrowing type, from inhabiting a general area above and below the ground surface within the vicinity of the operating device which includes a plurality of electrically energized coils mounted to a single probe which is inserted into the ground surface area known to be inhabited by the animals, whereby the coils are randomly energized in an inconsistent manner provided by a plurality of switches which create an irregular flow of sonic waves and physical vibrations that are imparted and transferred throughout the general surface and subsurface ground area, thereby causing a disturbing effect upon the rodents and encouraging them to leave the affected area without direct physical harm to them.

Abstract: A bird scare perch is disclosed. The bird scare perch is comprised of an elongated member which forms a perch upon which birds can land. A plurality of spray nozzles are supported adjacent to and directed at the elongated member. A source of fluid, preferably a liquid, communicates with the spray nozzles. A control mechanism, actuated by birds landing upon the elongated member, activates the flow of the fluid out of the spray nozzles. In this manner, the birds which have landed upon the elongated member are sprayed and placed in distress.

Abstract: A bird spook for frightening unwanted birds and other pests from a designated area such as a building, crop field, etc. The spook comprises a thin disc-like plate having at least one light reflecting surface suspended from a supporting arm by a swivel connection. The supporting arm may be attached to any surface of a building by an adjustable support bracket which enables the arm to assume any angle with respect to the building surface to insure freedom of movement of the reflecting plate. Alternatively, the supporting arm is made vertically adjustable for varying the height of the reflecting plate above the ground in crop field protecting installations. Air movements cause the plate to oscillate producing random light reflections annoying to birds and other pests.

Abstract: An effective but inexpensive device for scaring pests, such as birds, from an area to be protected is formed from an elongated, vertically extending post; a resilient wire mounted on, and extending from, the upper end of the post; and a pair of large, thin, light weight, highly light reflective discs rotatably suspended from the remote end of the wire in cantilever fashion and responsive to wind forces on the discs in order to provide a random, distracting motion as well as to cast darting light reflections in a random, erratic manner on the area surrounding the post.

Abstract: A pulsator for a jet resonator finding particular value and utility in rodent control while maintaining and achieving improved effectiveness together with built-in safe guards against accidental detrimental or fatal effects of ultrasonic sound on human beings while maintaining a low cost of parts and production thereby making improved pest control available to the broad populous, the pulsator including an elongated upright tube having a jet in a lower-end opening and having a ball-receiving seat structure circumscribing and as a part of the upper outlet opening, with a metal ball of smaller size than the cross-section of the elongated space defined in the tube such that the ball is tossed reciprocatingly upwardly in the tube without unduly limiting fluid stream when the ball is tossed upwardly but retarding the flow of the stream as the ball falls downwardly toward the open nozzle end of the lower-end jet which nozzle preferably projects upwardly into the space for a minor distance, pressure of the stream of

Abstract: A main tow line carries deterrent scarecrow devices such as optical or acoustical devices. The tow line is supported by wire or rope-held pulleys secured to movably supported poles attached in the soil. The tow line is actuated by a drive assembly imparting a reciprocative movement to the main tow line by converting a rotary motion into a linear motion. The system can be operated by motive power which is controlled in accordance with prevailing light intensity conditions by a light sensitive control system. Auxiliary deterrent devices are attached to the poles, i.e. in the regions of the support of the main tow line to provide for protection particularly in corners, and coupled to the separate ropes for the pulleys to be moved thereby upon change of stress when the tow line reciprocates.

Abstract: A bird frightener that may be removably disposed adjacent a tree or bush that bears fruit or berries that are attractive to birds as food. The bird frightener includes a pole that supports a prime mover on the upper end thereof, which prime mover rotates a number of spaced outwardly extending arms above the upper portion of the tree or bush. Each arm has at least one streamer thereon that waves as the arm rotates. Cam means operatively associated with the invention causes the arm to move upwardly and downwardly in what appears to an observer to be an erratic motion as the arms rotate. The upward and downward movement of the arms as they rotate, coupled with the waving streamers, is effective in frightening birds away from a tree or bush that has the invention mounted adjacent thereto, and as a result the fruit or berries on the tree or bush are not eaten by birds.