Fences – Metallic – Picket
Reexamination Certificate
2003-04-04
2004-01-06
Cottingham, John R. (Department: 3679)
Fences
Metallic
Picket
C256S065010
Reexamination Certificate
active
06672569
ABSTRACT:
The invention relates to a security fence. It is known to make such a fence to protect an establishment having articles to be kept secure.
In one known style of fence, spaced apart metal posts called pales are secured to one or more horizontal rails between end posts. The pales may have the profile of a V, a corrugated W or corrugated D. The rail usually an L-shaped thick metal section and the pales are secured to the rail by bolts passed through aligned holes in the vertical leg of the rail and the pales. Typically the pales are spaced about 50 mm apart, and the exposed flat surface of the other leg of the rail could be used as a step by an intruder. The rails are made of relatively thick metal sections for strength. This increases the cost of the rails. It is one object of this invention to provide a fence which avoids presenting an intruder with this step. It is another object of this invention to provide rails of sufficient strength for the purpose specified.
In one aspect the invention provides a security fence comprising generally vertical pales each secured by a bolt or the like to a generally horizontal rail, the pales being spaced apart along the rail with gaps in between, the rail comprising a length of shaped metal section having a thickness of about 2 mm to about 4 mm, the section comprising a main web and at least one side wall which is above the main web and extends at an angle so that the gap portions of the rail between pales cannot be used by an intruder as a step.
Preferably the rail is of substantially channel shaped section having opposite side walls which make the rail rigid despite its thinness.
In another aspect spikes are struck up from the upper side wall in the gaps, to act as an added deterrent to an intruder.
Preferably the pales abut the outer face of the web of the rail, and the side walls of the rail extend away from the rail on the side of the web remote from the pales.
Typically the pales extend a vertical distance above the horizontal rail.
The pales are secured to the rail by bolts passing through aligned holes, in the usual way.
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Caesar Rivise Bernstein Cohen & Pokotilow Ltd.
Cottingham John R.
Hadley Industries PLC
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