Rather than using an underground wire, they emit a radio signal from a central unit, and activate when the pet travels beyond a certain radius from the unit. When the pet approaches the buried fence line, the collar makes a warning sound and then gives the pet a harmless electric shock. A shock collar on the pet receives these signals. A buried wire around the containment area emits a radio signal to activate the receiver collar. Similar containment systems may be to contain livestock in circumstances where ordinary agricultural fencing is not convenient or legal, such as on British common land.Īn underground fence is an electronic system to prevent pets from leaving a yard. Īlthough called "fences", these fence less boundary systems are more accurately termed electronic pet containment systems. Only animals that wear equipment that captures the system's signals are affected by the defined boundaries of the system. If the warning is ignored and the pet crosses beyond the boundary of the fence, the pet receives an additional signal, such as a mild electric shock, or a combination of signals that causes the animal to adapt its behavior and remain within the boundary. The pet wears a lightweight collar that emits a sensory cue, such as a warning sound, when the pet nears the boundary. Technology Ī typical invisible fence transmits a radio signal that takes the geometric shape of the area that is enclosed by the system. In 1990, Invisible Fence Co became Invisible Fence Inc. In 1976, salesman John Purtell bought the rights to the pet fence and rebranded it as "Invisible Fence" which offered a different option for pet owners in terms of pet containment. Peck was a traveling salesman and through his travels, he saw enough dogs hit by cars that it led to him creating the pet fence system. The pet fence was created in 1973 by Richard Peck. The system was first invented and patented by Richard Peck in 1973. A mild electric shock is delivered by an electronic collar if its warning sound is ignored. A pet fence or fenceless boundary is an electronic system designed to keep a pet or other domestic animal within a set of predefined boundaries without the use of a physical barrier.
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