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His business also carried out tractor conversions and made farming equipment, including his battery-powered electric fence. With his brothers, Henry and Vivian, he invented a spinning top-dresser. By the 1950s, his business interests expanded into commercial fishing, operating a trawling venture from Raglan although this was not profitable.
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.
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.
The original non-shortable electric fence produced pulses of 2.5 kV. I believe most agricultural fences still use voltages around this value, but the current delivered can vary considerably. —Preceding unsigned comment added by 203.173.176.198 ( talk • contribs ) 11:50, 27 June 2007
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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 ...