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Concertina wire or Dannert wire [1] is a type of barbed wire or razor wire that is formed in large coils which can be expanded like a concertina. In conjunction with plain barbed wire (and/or razor wire/tape ) and steel pickets , it is most often used to form military-style wire obstacles .
Charger for a plus-minus net fence. An electric fence is a barrier that uses electric shocks to deter people and other animals [note 1] from crossing a boundary. The voltage of the shocks may cause discomfort or death. Most electric fences are used for agricultural purposes and other non-human animal control.
Chain-link fencing showing the diamond patterning A chain-link fence bordering a residential property. A chain-link fence (also referred to as wire netting, wire-mesh fence, chain-wire fence, cyclone fence, hurricane fence, or diamond-mesh fence) is a type of woven fence usually made from galvanized or linear low-density polyethylene-coated steel wire.
The end of the wire near the Scheldt. The wire near a Belgian farm, including a German patrol. Construction began in the spring of 1915 and consisted of over 200 km (125 mi) of 2,000-volt wire with a height ranging from 1.5 to about 3 m (5 to about 10 ft) spanning the length of the Dutch-Belgian border from Aix-la-Chapelle to the River Scheldt.
The effectiveness of any wire obstacle is greatly increased by planting anti-tank and blast antipersonnel mines in and around it. Additionally, connecting bounding anti-personnel mines (e.g. the PROM-1) to the obstacle with tripwires has the effect of booby-trapping the obstacle itself, hindering attempts to clear it.
A jet blast deflector (JBD) or blast fence is a safety device that redirects the high energy exhaust from a jet engine to prevent damage and injury. The structure must be strong enough to withstand heat and high speed air streams as well as dust and debris carried by the turbulent air. [ 1 ]
Fundamentally, a jointer's table arrangement is designed with two levels like a narrower thickness planer so that it consists of two long, narrow parallel tables in a row with a cutter head recessed between them, but with a side guide. This cutter head is typically driven by an electric induction motor.
After the war, Gallagher resumed manufacturing gas producers, setting up a facility at his property on Seddon Road in Hamilton and employing six workers. 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.