GB2094882A

GB2094882A - Security door-limiting stop

Info

Publication number: GB2094882A
Application number: GB8105280A
Authority: GB
Original assignee: Individual
Current assignee: Individual
Priority date: 1981-02-19
Filing date: 1981-02-19
Publication date: 1982-09-22

Abstract

A frame (13, 14, 15, 16) with pivotal mountings (17, 18) on a door limits the opening of the door by abutment against a wall. In a modification, a rod on the door slides in a tube on the wall, the rod and tube being swung by a handle, such as the handle 22, to an operative or an inoperative position. <IMAGE>

Description

SPECIFICATION Security devices for doors This invention relates to security devices for doors.

It is well-known for householders to have a chain device fitted to an outside door of the house to permit the door being opened only a few inches, so as to enable someone in the house to speak to a caller without opening the door wide enough to permit the caller to enter and also preventing the caller from forcing the door open further. Such devices are not sufficient however to prevent access by a determined intruder who can cut the chain.

It is an object of the present invention to provide an improved form of security device permitting limited opening of the door but giving more secure protection against forcible entry.

According to this invention, a security device for a door comprises a frame adapted for pivotal mounting on the door for swinging between first and second positions, the frame in the first position lying generally parallel to the plane of the door and the frame in the second position extending outwardly from the plane of the door to a wall adjacent to the door on the hinge side thereof to form a rigid structure between the wall and door limiting the opening of the door.

Generally speaking, a door may be arranged in a building with the wall to hold the frame for preventing the door from opening more than a short distance, being parallel to and generally in the plane of the door opening or at right angles thereto. This wall will be referred to hereinafter as the supporting wall.

If the supporting wall is at right angles to the door opening, then very conveniently the aforementioned frame is a rigid frame pivotally mounted on the inner side of the door for rotation about a substantially horizontal axis. Preferably means, e.g. a clip or catch or other securing device, is provided for holding the frame in a substantially horizontal position, the frame having a rigid member which, when in this position, extends outwardly from the door in the neighbourhood of the hinge line so that this rigid member will abut the supporting wall if the door is opened a short distance. The frame may be swung about its pivot axis to lie in the general plane of the door when it is required to open the door.

If the supporting wall is generally parallel to the plane of the door opening, then the frame may be mounted on the door for rotation about an axis which is generally horizontal, this frame having an element which, when the frame is raised to extend outwardly from the door, rigidly engages means mounted on said supporting wall so as to prevent the door opening more than a few inches. This element may be connected for example by a hinge or other articulated joint to the means on the wall and arranged so that articulation with respect to the means on the wall is possible only about an axis which is parallel to the hinge axis when the frame is positioned parallel to the door. It is convenient in such an arrangement to provide a short telescopic length in one of the members to allow for small opening of the door.The means on the supporting wall may comprise a member mounted for movement about an axis which is aligned with the axis of pivoting of the frame and the door when the door is closed, this member extending at an angle outwardly from the axis of pivoting to the aforementioned articulated joint.

The following is a description of two embodiments of the invention, reference being made to the accompanying drawings in which: Figure 1 is a perspective view of one embodiment of the invention; and Figures 2 and 3 are views in elevation of a second embodiment of the invention, showing a frame in a raised and in a lowered position respectively.

Referring to Figure 1 there is shown a door 10 mounted in a door frame 11. A supporting wall 12 located near the hinge line of the door extends at right angles to the door opening. A rigid frame comprising essentially three straight members 13, 14, 15 arranged in a triangular construction and a cross-member 1 6 is mounted on the door with the member 13 rotatable in supports 1 7, 1 8 such that the frame can be swung about a substantially horizontal axis through these two supports. The frame can be swung upwardly to the position shown in Figure 1 in which it is held substantially horizontally by means of a spring catch 20 on a support 21 engaing the aforementioned crossmember 1 6. A handle 22 is provided on the frame member 14.The frame member 1 5 extends outwardly from the door at an angle and in a position such that its outer end 23 will abut against the aforementioned support wall 12 when the door is slightly open as shown in the drawing.

This prevents the door from being opened any further. When it is required to open the door, the frame is pushed downwardly into a plane generally parallel to the door and so thereby enabling the door to be opened normally.

Figures 2 and 3 illustrate another embodiment of the invention arranged for use on a door 30 in a door frame 31 and having a supporting wall 32 which is generally parallel and in the plane of the door opening. A generally triangular frame 33 formed of rods or tubes 34, 35 and 36 has the member 34 pivotally mounted in supports 37, 38 on the door for rotation about a substantially horizontal axis. A cross-member 39 on the frame can engage in a spring catch 40-secured on the door to hold the frame in a position extending generally outwardly from the door. The frame has a lifting handle 41 on the member 36.This member 36 is articulately jointed at 44 to a member 45, the articulated joint having an axis of articulation, indicated by a hinge pin 46, which, when the frame is lowered to be generally parallel to the plane of the door, lies near the hinge axis of the door and is parallel thereto. The member 45 is telescopically supported in a rod or tube 47 carried on support means 48 mounted on the wall in pivot supports 49, 50 for pivotal movement about an axis which, when the door is closed, is substantially aligned with the axis of pivoting of the frame 33.

When the frame 33 is in the lower position shown in Figure 3, the door can be opened normaily, the pivoting provided by the articulated joint permitting the frame 33 on the door to move with respect to the support frame on the wall. The telescopic portion of the support frame allows for the necessary movement since the articulation axis is necessarily spaced away from the door axis.

When the frame is in the raised position, the articulation axis 46 does not permit of any articulation of the frame parallel to the hinge axis and the frame and support means constitutes effectively a rigid structure preventing the door from opening more than a limited amount permitted by the telescopic section of the support frame.

Although constructions using open frames have been more specifically described, it will be appreciated that many possible variations are possible in the shape and type of structure employed. In each case, however, the arrangement is such that, by a simple pivoting action, a structure on the door can be swung to a position in which it prevents the door from being opened more than a short distance.

Claims

1. A security device for a door, comprising a frame adapted for pivotal mounting on the door for swinging between first and second positions, the frame in the first position lying generally parallel to the plane of the door and the frame in the second position extending outwardly from the plane of the door towards a wall or like surface (hereinafter called the supporting surface) adjacent to the door on the hinge side thereof to form a rigid structure between the wall and door limiting the opening of the door.

2. A device according to claim 1 , wherein the frame is adapted for use with a door arranged with the supporting surface to hold the frame for preventing the door from opening more than a short distance, lying generally in the plane of the door opening.

3. A device according to claim 2, wherein the frame is a rigid frame pivotally mounted on the inner side of the door for rotation about a substantially horizontal axis.

4. A device according to claim 3, wherein a clip or catch or other securing device, is provided for holding the frame in a substantially horizontal position, the frame having a rigid member which, when in this position, extends outwardly from the door in the neighbourhood of the hinge line so that this rigid member will abut on said supporting surface if the door is opened a short distance; the frame being swingable about its pivot axis to lie in the general plane of the door when it is required to open the door.

5. A device according to claim 1, wherein the frame is adapted for use with a door arranged with the supporting surface lying in the general plane of the door opening.

6. A device according to claim 5, wherein the frame is adapted to be mounted on the door for rotation about an axis which is generally horizontal, the frame having an element which, when the frame is raised to extend outwardly from the door, rigidly engages means mounted on said supporting surface so as to prevent the door opening more than a few inches.

7. A device according to claim 6, wherein the element is connected by a hinge or other articulated joint to the means on the supporting surface and arranged so that articulation with respect to the means on the supporting surface is possible only about an axis which is parallel to the hinge axis when the frame is positioned parallel to the door.

8. A device according to claim 7, wherein said element and said means are arranged to telescope to permit small opening of the door.

9. A device according to claim 7 or 8, wherein said means on the supporting surface comprises a member mounted for movement about an axis which is aligned with the axis of pivoting of the frame and the door when the door is closed, this member extending at an angle outwardly from the axis of pivoting to the aforementioned articulated joint.

10. A security device for a door, substantially as hereinbefore described with reference to Fig. 1 or to Figs. 2 and 3 of the accompanying drawings.