NZ190814A - Door stop - Google Patents

Description

1 908 1 Patents Form No. 5 PATENTS ACT 1953 COMPLETE SPECIFICATION After Provisional No. 190814 dated 25 June 1979 "SECURITY STOP FOR DOORS" I, BRIAN FRANCIS McGARRY of 578 Harewood Road, Christchurch 4, New Zealand, a British subject and New Zealand citizen, do hereby declare the invention for which I pray that a patent may be granted to me, and the method by which it is to be performed, to be particularly described in and by the following statement:- 190814 This invention relates to a security stop for a door and more particularly relates to a security stop for use behind a door so that when the security stop is activated the door can only be 5 opened slightly.

At present a main door or main doors of a home or building which allow access to the property from the outside is sometimes, provided with a security chain which allows the door to be opened a small distance. 10 Such a construction of a security chain can still be cut by bolt cutters and this type of security stop does not necessarily stop a determined person from gaining entry even though the security chain is used. An object of the present invention is to provide a security stop for use -behind—a-door-which.-security stop allows the door to be opened only a short distance.

A further object of the present invention is to provide a security stop for a door which offers to the public a useful alternative choice.

Further objects and advantages of the present invention will become apparent from the following description which is given by way of example only.

According to a first aspect of the present invention there is provided a security stop for placement 25 in the way of opening movement of a door, the security stop comprising a cylindrical 190814 housing which has therein a biasing means and an extending member which is movable under the action of the biasing means between a first position in which the member is retained substantially within the housing and a second position in which the member extends from the housing to above the level of a floor in which the housing is mounted, the arrangement being such that with the housing positioned below the level of a floor of a building in the way of opening movement of the door and with the extending member in its first position the door can be opened and closed and when the member is in its second or raised position the opening movement of the door is stopped with the door ajar against further opening movement. 1 908 1 4 The member can have on a lower end thereof, within the housing, a pin which moves in a guide slot formed in the housing, the guide slot has therein a locking portion into which the pin locks when the member is in its first position, the member being released by being rotated around its longitudinal axis to move the pin into alignment with the guide slot so that the member can move to its second position.

Further aspects of the present invention which should be considered in all its novel aspects will ♦ become apparent from the following description which is given by way of example only.

An embodiment of the present invention will now be described with reference to the accompanying drawing in which: Figure 1: shows a cross-section in a vertical plane through a security stop according to the present invention; and Figure 2: shows a section on the lines I-I through the security stop shown in Figure 1.

The security stop according to the present invention can be used in any home or business situation. The example described herein will be described with reference to its use in a home situation where it is a substitute for a security chain. The security stop is positioned in association with a door so that the door can be opened only a short distance when the security stop is activated. 1908 The security stop is generally indicated by arrow 1 and is mounted so that a mounting plate 2 thereof is flush with a floor or floor covering of the building in which it is used. The mounting plate 2 is connected or fixed to a housing 3 which is, in use, positioned in a hole drilled in a concrete floor or positioned in a pipe set in a concrete floor or the mounting plate 2 can be fixed to a flooring material with the housing 3 extending beneath the level of the floor. i The housing 3 can be constructed from a tubular metal or plastics material which has formed therein a slot or guide 4.

The housing 3 has mounted therein a member 5 which has a pin or pins 6 fixed thereto, the pin 6 extending to the side thereof and into the slot 4. The pin 6 being arranged to travel in the slot 4 so that the member 5 can move from its retracted or first position substantially within the housing shown dotted in Figure 1 to its extended or second position shown.

In its first position the member 5 has the upper end 7 thereof immediately above the level of the mounting plate 2. This level shown dotted at 8 in Figure 1 would generally be slightly higher or flush with the carpet or floor covering on the floor the level of which is indicated at 9. 1908 14 In its second position the member 5 is raised to the position shown and this is effected by unlocking the member from its first position. This locking can be effected by providing at a point near the bottom of the slot 4 a locking portion 10. The locking portion 10 can be an extension of the slot or an angled rebate as shown in Figure 1. The member 5 being unlocked by turning same about its longitudinal axis through about ninety degrees to disengage the pin 6 from the locking portion 10. The member 5 being forced by a biasing means 11 upwards to its extended position in which the pin 6 is at the top of the slot 4. When its extended position the rear of a door contacts the extended member 5.

The spring biasing means can be held in position by a locating pin 12 extending transversely through aligned apertures in the housing 2.

The housing 2 can be constructed from aluminium, stainless steel or another metal or metal alloy material. The upper end 7 of the member 5 can be provided with a roughened or textured surface so that it can easily be turned to unlock the member 5 from its first position or to lock the member in its first position.

In practice the security stop according to the present invention is placed in position in the floor or ceiling of a room immediately behind the door so that when it is in its second position it interrupts the opening movement of the door. 190814 When situated in a floor situation the bottom of the door will pass over the top of the extending member 7 when it is in its first or retracted position. This allows the door to be opened and closed in the 5 normal manner. When'the security stop is to be acti vated and the member 5 moved to its raised or second position a user places a foot on the top 7 of the member 5 and the foot'is twisted through about ninety degrees to disengage the pin 6 from its engagement 10 with the locking portion 10 of the slot 4. This allows the biasing means 11 to raise the member 5 to its raised or second position in which a door cannot be opened fully.

In this position the member 5 stops the door 15 from being opened fully. When the security stop is to be disengaged a person^ stands on the top 7 of the member 5 and forces same down into the housing 3 and when down it is turned to lock the pin 6 in the locking portion 10 of the slot 4.

It is also to be appreciated that a security stop according to the present invention can be fitted to a sliding door by placing same in the track on which the door, slides or in any position in which it interrupts the opening movement of the 25 door.

NAPA i - 7 - - 5DEC 1933 , J 9OB j 4 Thus by this invention there is provided a security stop for use behind a door which stop allows the door to be opened only slightly.

A particular example of the present invention has been described by way of example and it is envisaged that improvements and modifications thereto can take plate without departing from the scope of the appended claims.

Claims (14)

190814 WHAT I CLAIM IS:

1. A security stop for placement in the way of opening movement of a door, the security stop comprising a cylindrical housing which has therein a biasing means and 5 an extending member which is movable under the action of the biasing means between a first position in which.the member is retained substantially within the housing and a second position in which the member extends from the housing to above the level of a floor in which the housing 10 is mounted, the arrangement being such that with the housing positioned below the level of a floor of a building in the way of opening movement of the door and with the extending member in its first position the door can be opened and closed and when the member is in its second 15 or raised position the opening movement of the door is stopped"with the" door "ajar- against "further opening "movement", ««

2. A security stop as claimed in claim 1 wherein the member has on a lower end thereof, within the housing, a pin which moves in a guide slot formed in the housing.

3. A security stop as claimed in claim 2 wherein the guide slot has a locking portion into which the pin is locked when the member is in its first position, the member being released by being rotated around its longitudinal axis to move the pin into alignment with 25 the guide slot so that the member can then move to its second_position.

4. A security stop as claimed in any one of the preceding claims wherein the housing is attached to a mounting plate through which the movable member extends. - 9 - 190814

5. A security stop as claimed in claim 4 wherein the housing is constructed from a tubular length of metal pipe. I

6. A security stop as claimed- in claim 5 wherein the housing, the movable'member and mounting plate are constructed from a metal or metal alloy material.

7. A security stop as claimed in claim 6 wherein the housing, mounting plate and movable member are constructed from an aluminium alloy, the mounting plate having therein holes through which fixing means can attach the mounting plate to the floor of a building.

8. A security stop as claimed in any one of the preceding claims wherein the biasing means is a spring situated within the bottom of the housing, the spring being biased against the bottom of the movable member and being maintained in position by a locating pin which extends between aligned apertures in the bottom of the housing.

9. A security stop substantially as hereinbefore described with reference to the accompanying drawings.

10. A security stop as claimed in any one of the preceding claims wherein the housing is positioned in the way of opening movement of a sliding door.

11. A security stop as claimed in any one of claims 1 to 9 wherein the housing is positioned in the opening swing of a side hung door.

12. A security stop as claimed in claim 11 wherein the housing is inserted in a hole drilled in a concrete floor : - 10 - or is placed iiT~a~pip"e set in a concrete floor.

13. A security stop as claimed in any one of claims 1 to 11 wherein the housing is fixed to a wooden floor so that the housing extends beneath the floor through a hole therein.

14. A security stop as claimed in any one of claims 4 to 11 when dependent on claim 3 wherein a recess is formed in a wooden floor, the recess being of the same depth as the thickness of the mounting plate so that when in position the mounting plate is flush with the floor and the housing extends beneath the floor through a hole therein. BRIAN FRANCIS McGARRY By His Attorney BALDWIN, SON & CAREY 11