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Invisible Fence Inc. (commonly referred to as Invisible Fence Brand) is a company that designs radio pet fences for cats and dogs. Manufactured and distributed by Radio System Corporation, the company sells wireless and fenceless systems that were first introduced in 1973. [ 1 ]
A pet fence or radio fence, 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. A mild electric shock is delivered by an electronic collar if its warning sound is ignored.
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 ...
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The Secure Fence Act of 2006 authorizes the construction of 700 additional miles (1,100 km) of double chain link and barbed wire fences with light and infrared camera poles. The Secure Fence Act of 2006 ( Pub. L. 109–367 (text) (PDF) ), also labelled H.R. 6061, is an act of the United States Congress which authorized and partially funded the ...
Some PTFE parts are made by cold-moulding, a form of compression molding. [44] Here, fine powdered PTFE is forced into a mould under high pressure (10–100 MPa). [44] After a settling period, lasting from minutes to days, the mould is heated at 360 to 380 °C (680 to 716 °F), [44] allowing the fine particles to fuse into a single mass. [45]