An internal, rechargable, battery operated device for outdoor use in deterring livestock from passing through an open gate in a fence. The device incorporates a detector which senses the body heat of a large approching animal and relays a signal to a special siren, thus producing high intensity ear-splitting sound waves to frighten them away. The sensing mechanism is of the type capable of detecting infrared heat generated by the animal's body. The operating principle of this invention is very straightforeward. However, its uniqueness lies not only in the application of this technology but also in the electronic circuit which operates and controls the device. The device is ruggedly constructed to whithstand the rigors of farm, ranch, or industrial use in all kinds of weather and is inexpensive and easy to install using its built in hanger.

A motion-sensitive pest and varmint deterrent device used to detect and ward off unwanted pests and varmints from a garden, the device having a detection branch, and a sprinkler branch. A motion detector and a light are positioned at the top end of the detection branch. The sprinkler branch has a sprinkler head attached at the top end. The bottom end of the sprinkler branch is attached to a horizontal pipe attached to a water hose. The sprinkler branch has a solenoid valve in communication with the motion detector which selectively controls the flow of water to the sprinkler head. Reservoirs containing gardening substances are connected to and positioned along the horizontal pipe between the bottom portion of the sprinkler branch and the water hose. When movement is detected by the motion detector, the light is activated and the solenoid valve initiates water flow and the sprinkler head disperses water onto the surrounding area, thereby scaring off unwanted pests and varmints.

A device for repelling cats from areas where their presence is unwanted comprised a tranparent clylindrical shaped canister capable of light transmission therethrough which can optionally be mounted upon a center support having various attachments thereto for placement of the device in indoor or out door areas. An optional communication light source causes the canister to glow and transmit light when in a darkened area.

An attachment used with a sensor, which includes an exposed sensing element, for preventing birds and animals from perching over the sensing element is disclosed. The attachment includes an elongated bent rod and a mechanism for mounting the rod to one of the side walls of the sensors. When mounted to the sensor's side walls, the bent configuration of the rod defines an open area adjacent the sensing element, which is exposed from an end wall of the sensor. The rod's distal end segment extends longitudinally over and is spaced from the sensing element, while the other segments of the rod are spaced laterally and diagonally from the sensing element. The distal end segment is spaced above the top of the device at a specific height to prevent interference with the operation of the device while preventing birds and animals from moving between the distal end segment and the sensing element. In addition, the laterally extending segments of the rod are inclined to prevent birds and animals from perching on them. The length of the rod is selected to extend a sufficient distance from the sensor's end upper wall, upon which the sensing element is located, to prevent large birds from straddling the sensor.

A system and method for repelling and deterring animals, and particularly deer, includes devices to trigger each of the animal's senses of taste, smell, sound, sight, and touch. When an animal's presence if sensed, each device is triggered in sequence, with the sequence capable of being changed to reinforce the repelling and deterring effect on the animal.