GB2239038A

GB2239038A - Method of installing an inertia sensor in a door or window

Info

Publication number: GB2239038A
Application number: GB9026990A
Authority: GB
Inventors: Michael Morrin
Original assignee: Individual
Current assignee: Individual
Priority date: 1989-12-12
Filing date: 1990-12-12
Publication date: 1991-06-19
Also published as: GB9026990D0; IE892831A1

Abstract

A method of installing an inertia sensor 14 in a window or door construction 11 which has a profile of sufficient dimension for housing the sensor 14 so that the sensor 14 is mounted inside the profile at a suitable location. An electrical socket 17 may be provided in the construction to enable the sensor 14 to be connected to an alarm control panel via suitable cables. <IMAGE>

Description

A METHOD OF INSTALLING AN INERTIA SENSOR This invention relates to a method of installing an inertia sensor.

Inertia sensors are widely used in burglar alarm installations. The purpose of such a sensor is to detect unauthorised interference with a window or door having such a sensor mounted thereon. Inertia sensors are well known and need not be described in the present Specification.

A significant problem with known installations is that the sensor is surface mounted on the window or the door. Accordingly, the use of such sensors detracts from the aesthetics of the door or window.

It is an object of the present invention to overcome this problem.

The invention, therefore, provides a method of installing an inertia sensor means which method comprises providing a window or door construction having a profile of sufficient dimension for housing the sensor means; and mounting the sensor means inside the profile at a suitable location.

Preferably, the method further comprises providing an electrical socket in or on the door or window; and providing electrical connection between the sensor means and the socket.

The invention also provides a window or door frame construction having a profile, and an inertia sensor mounted inside the profile at a suitable location.

The invention will be understood in greater detail from the following description of a preferred embodiment thereof given by way of example only and with reference to the accompanying drawings in which: Figure l is a perspective view of mullion and transmon of a window in accordance with the method of the invention; Figure 2 is a cross-sectional view of the mullion of Figure 1 of the drawings; and Figure 3 is a side-elevation of the mullion of Figure 1 of the drawings.

Referring now to the drawings, there is shown a transmon 10 and mullion 11 of a window installation 12. Both the transmon 10 and the mullion 11 are made from uPVC.

With particular reference to Figure 2 of the drawings, there is shown a cross-section of the mullion 11. It will be noted that the cross-section of the mullion 11 reveals a profile having a plurality of hollow sections. In the largest of these sections 13 is mounted an inertia sensor 14 of any known type. It will be appreciated that the mullion 11 is produced by extrusion and cut to the required length. Thus, into the open end of the mullion 11 (which end will be in sealing relationship with the transmon 10 when in situ as part of a window) is inserted the sensor 14 which is welded to the inside walls of the section 13. Relatively large welds 15, 16 are shown for explanatory purposes only; it will be appreciated that, in practice, the welds 15, 16 will be small in size.

In order to enable the sensor 14 to be electrically connected to a cable which links the sensor 14 with an alarm control panel (not shown), a polarity conscious socket 17 is provided. The socket 17 is flush mounted in the mullion 11 the pins of which are exposed on what will eventually be a inner facing side of the mullion 11. Four cables or wires (not shown) from the sensor 14 are each connected to a respective pin of the socket 17. The four cables provide a 24-hour monitoring protection loop (two cables) and sensor cables oer se (two cables) as is well known.

Following the mounting of the sensor 14 and the socket 17, the mullion 11 is joined to the transmon 10 in a conventional manner by welding.

Following installation of the window, the user may, if desired, use the sensor 14 in a burglar alarm system by simply providing the necessary cable which links the socket 17 (via a suitable electrical plug (not shown)) to the alarm panel.

Having regard to the 24-hour protection loop, removal of the electrical plug would, as is well known, result in an alarm condition.

If desired, the socket 17 may be countersunk in the mullion 11. Accordingly, if the socket 17 is not being used, a plug (not shown) could be inserted so as to close the opening containing the socket 17 thereby providing a flush and aesthetic finish to the mullion 11. The plug could be removed ana tn electrical plug inserted which would be in flush re#jLionship with the mullion 11.

In addition, the electrical plug and the socket 17 could, if desired, incorporate a known latching mechanism which would prevent the accidental withdrawal of the electrical plug following installation.

It will be appreciated that a door could also be manufactured in a similar fashion.

The invention is not limited by or to the specific embodiment described which can undergo considerable variation without departing from the scope of the invention.

Claims

CLAIMS:

1. A method of installing an inertia sensor means which method comprises providing a window or door construction having a profile of sufficient dimension for housing the sensor means; and mounting the sensor means inside the profile at a suitable location.

2. A method as claimed in Claim 1 wherein the sensor means is mounted by welding to at least one internal wall of the profile.

3. A method as claimed in Claim 1 or Claim 2 wherein the construction comprises a window frame having a transmon and a mullion, the profile having a plurality of hollow sections housed in the mullion.

4. A method as claimed in Claim 3 wherein the hollow sections are of varying dimensions.

5. A method as claimed in Claim 4 wherein the sensor means is mounted in the larger or largest of the hollow sections.

6. A method as claimed in any of Claims 1-5 which further comprises providing an electrical connection means on the construction; and electrically connecting the sensor means to the connection means.

7. A method as claimed in Claim 6 wherein the electrical connection is a socket.

8. A method as claimed in Claim 6 wherein the electrical connection is a plug.

9. A method as claimed in any of Claims 6-8 which further comprises mounting the electrical connection in a recess in the construction.

10. A method as claimed in Claim 9 which further comprises providing a removal cover for the recess.

11. A method of installing an inertia sensor means substantially as hereinbefore described with reference to and as illustrated in the accompanying drawings.

12. A window or door frame construction having a profile, and an inertia sensor means mounted inside the profile at a suitable location.

13. A construction as claimed in Claim 12 wherein the sensor means is mounted on an internal wall of the profile by welding.

14. A construction as claimed in Claim 12 or Claim 13 wherein the construction comprises a window frame having a transmon and a mullion, and where the profile constitutes the mullion.

15. A construction as claimed in Claim 14 wherein the profile comprises a plurality of hollow sections of varying dimensions.

16. A construction as claimed in Claim 15 wherein the sensor means is mounted in the larger or largest of the hollow sections.

17. A construction as claimed in any of Claims 12-16 which further comprises means for making an electrical connection from the sensor means to an alarm apparatus.

18. A construction as claimed in Claim 17 wherein the electrical connection means is mounted on the mullion.

19. A construction as claimed in Claim 17 or 18 wherein the electrical connection comprises a plug connected to the sensor means by suitable wires.

20. A construction as claimed in Claim 17 or 18 wherein the electrical connection comprises a socket connected to the sensor means by suitable wires.

21. A construction as claimed in any of Claims 17-20 wherein the electrical connection is mounted in a recess in the mullion.

22. A construction as claimed in Claim 21 which further comprises a removable cover for the recess.

23. A construction substantially as hereinbefore described with reference to and as illustrated in the accompanying drawings.