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Clamason’s know-how opens a window of opportunity for easy-cleaning facility on Securistyle’s new Defender Egress® range

Cheltenham-based Securistyle is one of the largest UK manufacturers of window hardware components such as hinges, handles and locking mechanisms (www.securistyle.co.uk). Its market-leading window ironmongery, which includes the Defender Egress® friction hinge, is widely specified in the social housing sector, as well as the private sector and commercial markets, both in the UK and internationally.

Manufactured from austenitic stainless steel for added durability and maximum resistance to corrosion, Securistyle’s top-selling product range has recently been redesigned and enhanced. The Defender Egress® friction hinge is a domestic product for emergency exit and incorporates an easy-cleaning facility: it is tested to 30,000 cycles and carries a ten-year guarantee.

Clamason Industries’ 3in long “insert slider” component in structurally rigid, stainless steel grade 301 is overmoulded with an acetal copolymer at Clamason’s plastics moulding subcontractor and fits into the stainless steel track, both 12in and 16in versions, on the Defender Egress®. Clamason is currently manufacturing 2.5 million per year of this component, which is produced in pairs for the top and bottom of a window.

The principle is that you “press & push” the slider, which moves the sash away from the frame, creating a gap to reach the outside of a window from within a building for cleaning purposes.

In more detail the hinge operates as follows. From the fully closed and locked position, the vent can be opened to a full 90° to provide emergency exit in compliance with BS 5588 Part 1:1990 and Building Regulations Approved Document B for fire escape windows. Furthermore, in order to get to the glass from inside a building to clean it, the insert sliders (i.e. release levers) at both top and bottom of the vent can be depressed, allowing the pivot point to be moved towards the centre of the opening. That provides the required gap between vent and frame for cleaning access in accordance with BS 8213 Part 1:2004. The vent is closed and reset into its fire escape mode by simply grasping the handle and pulling the vent shut.

Clamason redesigned its insert slider component, manufactured on its 80t Kaiser / Bruderer press, to later incorporate subcontract plastic overmoulding. The further process advantageously avoids the potential for finger injury when operating the mechanism in situ, minimising a risk to safety.

Accordingly, Clamason’s convenient one-stop-shop avoids the pitfalls inherent in the multiple sourcing of components and the attendant assembly operation.

The project illustrates well how Clamason's expertise and experience are increasingly being called upon to fulfil a central role in project management and the organisation and co-ordination of subcontractors. The latter may include suppliers of precision diecastings, plastic mouldings and fasteners or of zinc plating, anodising and painting services.

To obtain further technical information, please contact:
Mr Timothy D Jones
Business Development Manager,
CLAMASON INDUSTRIES LTD
Gibbons Industrial Park
Dudley Road
Kingswinford,
West Midlands
DY6 8XG,
U.K.

Tel: +44 (0)1384 408 513
fax: +44 (0)1384 279 222
email: timj@clamason.co.uk
Web: www.clamason.co.uk

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