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In the 1930s, he discovered that electricity could be useful in confining animals when he made a triggering mechanism that made a car electrically active when a horse rubbed against it. By 1937, he had developed an electric fence for farmers, selling battery powered units [ 1 ] and being granted a patent. [ 2 ]
Weed Eater is a string trimmer company founded in 1971 in Houston, Texas by George C. Ballas, Sr., the inventor of the device. The idea for the Weed Eater trimmer came to him from the spinning nylon bristles of an automatic car wash. He thought that he could come up with a similar technique to protect the bark on trees that he was trimming around.
A "stun–lethal" fence may also consist of two fences; one set of wires forming a conventional pulsed DC non-lethal fence, the second set (interleaved with the first) forming a 6.6 kV AC lethal fence, energized when the DC fence detects an intruder. Alternatively it may consist of a single, AC or pulsed DC fence capable of running in "safe ...
Ballas got the idea for the trimmer while driving through an automatic car wash, where the rotating brushes gave him an idea. Using a tin can laced with fishing line and an edge trimmer, he tried out his idea, which worked. After some refinements, he shopped it around to several tool makers, who all rejected his invention.
In areas where such a tall fence is unsuitable (for example, on mountains subject to very high winds), deer may be excluded (or contained) by a fence of ordinary height (about 1.5 metres [4 feet 11 inches]), with a smaller one of about 1 metre (3 feet 3 inches) high, about 1 metre (3 feet 3 inches) away from it, on the same side as the deer.
A strand of electric fence may also keep horses from pushing on a mesh fence. Mesh fencing needs to be heavy-gauge wire, woven, not welded, and the squares of the mesh should be too small for a horse to put a foot through. "Field fence" or "no-climb" fence are safer designs than more widely woven "sheep fence."
Purchased in late 1950s or early '60 by the Beaird Company, also of Shreveport, it was known as Beaird-Poulan. The company was acquired by Emerson Electric in 1972, and was purchased by Electrolux in 1984, which closed its Shreveport factory in 1988. In 2006 Electrolux spun off Husqvarna into its own company.
Roberts believes that horses use a non-verbal language, which he terms "Equus," and that humans can use this language to communicate with horses. In order to promulgate his methods, Roberts has authored a number of books including his original best-seller, The Man Who Listens to Horses , [ 1 ] and regularly tours with a live demonstration.