GB2270337A

GB2270337A - Safety window

Info

Publication number: GB2270337A
Application number: GB9317353A
Authority: GB
Inventors: Heinrich Saelzer
Original assignee: Saelzer Sicherheitstechnik GmbH
Current assignee: Saelzer Sicherheitstechnik GmbH
Priority date: 1992-09-05
Filing date: 1993-08-20
Publication date: 1994-03-09
Anticipated expiration: 2013-08-20
Also published as: DE9211974U1; GB2270337B; DE4326324A1; DE4326324C2; GB9317353D0

Abstract

Locking elements (4 and 5) are evenly distributed along the length of the frame members in a grooved area between the outer frame (1) and the casement (3) of a safety window. A locking element (4 or 5) rigidly secured to the outer frame (1) or to the casement (3) may be coupled to a respective locking element (4 or 5) movably secured to the casement (3) or the outer frame (1) when the casement (3) is in closed position. To ensure that the casement (3) may be sufficiently safely locked, without impairing the burglar-proof and attack-resistant effect, within the outer frame (1) by means of a turning and tilting fixture (8), the turning and tilting fixture (8) is attached outside the grooved area on the inside of the safety window and the locking elements (4 or 5) are inside the grooved area. <IMAGE>

Description

SAFETY WINDOW This invention relates to a burglar-proof and shatterresistant safety window comprising an outer frame and a casement.

The outer frame and the casement are provided, within a grooved area, with locking elements which are distributed over the length of the frame members. A respective locking element rigidly secured to the outer frame or the casement may be coupled to a respective locking element which is rigidly or movably secured to the casement or the outer frame respectively, when the sash is in its closed position.

In such generally known safety windows the locking elements arranged within the grooved area between the outer frame and the casement are evenly spaced at relatively close intervals over the length of the outer frame. This arrangement of the locking elements is necessary so that impact forces directed onto the casement or onto its filler may thus be distributed evenly over the periphery of the casement, and may be transferred onto the outer frame, and from there evenly onto the soffit area of the masonry opening sealed by the safety window.

The effects of unevenly distributed locking elements could be demonstrated by attempts to shatter safety windows fitted with integrated turning and tilting fixtures. In particular, the length of the scissor-like brackets of such fixtures, arranged in the grooved area in this case, necessarily means that correspondingly long sections of the frame members must be free of locking elements. This leads to weak spots in the otherwise friction-locking joint between the outer frame and the casement resulting from the relatively short intervals between elements.

These weak spots are enough to allow the outer frame to be torn out of the frame plane as a result of impact forces initially applied in the area free from locking elements and thus to be plastically distorted. One single frame member distorted in this way is sufficient to reduce the spacing between the frame members attached to the distorted frame member, such that the frictionlocking joint between the locking elements attached to the frame member and the corresponding locking elements on the outer frame is lost over at least a substantial section of the attached frame member even int he case where said attached frame member would otherwise retain its extended form. Consequently, there have been no successful attempts hitherto to develop windows with an integrated turning and tilting fixture that are sufficiently burglar-proof and shatter-resistant.

The object of the present invention is to provide a safety window of the aforementioned type such that its wings may be operated by a turning and tilting fixture and nonetheless be sufficiently safely locked without impairing the burglar-proof and attack-resistant effect within the outer frame.

This object is achieved on the basis of a safety window of the type specified in the first paragraph hereto having a turning and tilting fixture which is attached outside the grooved area on the inside of the safety window.

The attachment, according to the invention, of the turning and tilting fixture outside the grooved area on the inside of the safety window represents a reverse arrangement, which actually goes against the modern trend of positioning such fixtures directly in spaces provided in hollow profiles of the frame and thus providing a smooth-walled frame structure as far as possible without any projections.

After initial experience with turning and tilting fixtures, these were themselves then integrated into the frame profile, in the case of solid wood profiles but not hollow metal profiles, and special grooves had then to be cut into them to accommodate the fixtures. In contrast, the arrangement according to the invention goes back to the original arrangement of turning and tilting fixtures and thereby provides a free space in the grooved area of the frame to position the locking elements without hindrance, to ensure their movability unless they are to be rigidly arranged. The locking elements may thus be evenly spaced inside the grooved area along the length of all the frame members to ensure that the impact forces directed onto the casement or its filler are evenly transferred via the outer frame into the masonry.

According to a particularly advantageous embodiment of the invention, a closing rod of a guide rod arrangement and/or a scissor-like bracket or a scissor-like guide rod of the turning and tilting fixture is provided with an operating part which projects into the grooved area when the casement is in its closed position and is connected to a slide rod of the locking elements.

This configuration allows the locking and unlocking movements as well as the turning and tilting movements of the window wing, i.e. all operations necessary, to be implemented by one handle in the manner of a gear lever. The movable locking elements secured to interconnected slide rods are selectively moved into the locked or unlocked position in the conventional way by means of this handle, which may be attached by a lock.

The capability of a closing rod of the guide rod arrangement and/or scissor-like bracket of the turning and tilting fixture to be connected to a slide rod of the locking elements enables the window wing to be turned or tilted, depending on the position of the handle, at the same time as the locking elements reach the connection-free position.

- A specific embodiment of a window according to the invention will now be described with reference to the accompanying drawings, in which: Fig. 1 is a view onto the inside of the window; and Fig. 2 is an enlarged cross-section through an outer frame and a casement in accordance with the present invention.

The illustrated safety window essentially consists of an outer frame-l and a casement 3 enclosing a pane of safety glass 2.

Locking elements 4 and 5 are evenly distributed along the length of the frame members in a grooved area between the outer frame 1 and the casement 3. The locking elements 4 are rigidly secured to the frame members of the outer frame 1, whereas the locking elements 5 are secured in conventional manner to slide rods 6, which are connected to one another by means of corner guide brackets, and are operated to move with these rods by means of a handle 7 on the casement 3 in such a way that each locking element 5 on the casement side may engage with a respective locking element 4 on the outer frame side.

A turning and tilting fixture 8 is secured to the inside of the outer frame 1. This fixture 8 comprises one vertically aligned and one horizontally aligned rod, 9 and 10 respectively, and is completed by two scissor-like brackets 11 on the horizontal upper frame member of the outer frame 1, each of which have a scissor-like guide rod 12. One of the scissor-like guide rods 12 is provided with a laterally projecting operating part 13, which protrudes into the grooved area, to engage with one of the movable locking elements 5 to slide along with it.

As shown in the Fig. 2 diagram, the operating part 13 is angled and one leg thereof is welded laterally onto the rod arrangement 9 of the turning and tilting fixture 8, which is encased in a covering profile 14, and engages into the gap between the outer frame 1 and the casement 3. The other leg of the operating part 13' is welded onto a locking element 5' and is thus connected to the slide rod 6. The handle 7 for operating the locking elements 5 may assume the function of an operating lever 15 (shown in Fig. 1) for the turning and tilting fixture 8 in this embodiment; so that one central control in the form of a handle 7 is sufficient to lock and unlock as well as open and close or tilt and pivot the casement.

Claims

CLAIMS:

1. A burglar-proof and shatter-resistant safety window comprising an outer frame and a casement which are provided with locking elements, within a grooved area, distributed along the length of the frame members, in which respect a respective locking element rigidly secured to the outer frame or the casement may be coupled to a respective locking element which is rigidly or movably secured to the casement or the outer frame, respectively, when the casement is in its closed position, and a turning and tilting fixture which is attached outside the grooved area on the inside of the safety window.

2. A safety window according to Claim 1 wherein a closing rod of a guide rod arrangement and/or scissor-like bracket or a scissor-like guide rod of the turning and tilting fixture is provided with an operating part which projects into the grooved area when the casement is in its closed position and is connected to a slide rod of the locking elements.

3. A burglar-proof and shatter-resistant window substantially as hereinbefore described with reference to and as illustrated by the accompanying drawings.