GB2149442A

GB2149442A - Security door

Info

Publication number: GB2149442A
Application number: GB08326490A
Authority: GB
Inventors: Harold Raymond Johnson
Original assignee: Individual
Current assignee: Individual
Priority date: 1983-10-04
Filing date: 1983-10-04
Publication date: 1985-06-12
Also published as: GB8326490D0

Abstract

A security door 10 affording visibility therethrough fits outside an external door or window 12 and is adapted to be unlocked from the outside with a key, or a lock for door 10 may be provided in door frame 16. Door 10 may comprise openwork, 18, e.g. wrought ironwork, angleiron frame 28 and cross supports and a steel sheet panel 32, hinge lock 36 and welded hinge pin 42. <IMAGE>

Description

SPECIFICATION Doors and the like This invention relatesto security doors andthe like.

These days, a person who opens an external door is vulnerable to attack. By external door is meant one accessible to the public, e.g. an external door of a house, a shop door opening on to the street or a back-yard or, in a block of flats, a door opening onto a corridor outside the flat. As a security measure for such doors, it has been proposed to provide a double door such that the inner door can be opened while the outer door remains locked and affords visibility therethrough. Then, only if the person opening the inner door is satisfied that a visitor is bona fide, need the outer door be opened. The proposal is complicater and not suitable for wide use.

According to one aspect ofthe invention there is provided a security door as defined in claim 1.

In considering a modification of the latter, a lock might be mounted to the doorpost ratherthantothe door. According to another aspect of the invention there is provided a door arrangement as claimed in

claim 2.

The invention can also be modified so asto apply to a window, skylight, trap door orthe like. If any ofthese or a door opens outwardly instead of inwardly, the invention can be further modified so that the security door constitutes an inside cover and then serves the somewhat different purpose of providing additional securitywhileallowing the window, skylight, trap door or door still to be visible from inside the premises. Another aspect of the invention consists in a modification as claimed in claim 17.

Reference will now be made by way of exampleto the accompanying drawings, in which Fig. 1 is a part horizontal section of a door arrangement embodying the invention; and Fig. 2 is a partial external view of the arrangement shown in Fig. 1.

Referring to the drawings, the door arrangement shown comprises a security door 10 affording visibil itytherethroughthatfitsoutside an external door 12 and is adapted to be unlocked from the outside with a key (not shown) inserted through a keyhole 19to operate a lock 20. The security door 10 opens outward, as shown by arrow 14. As will be apparentfrom the figs, the security door 10 is suitable to befitted to an existing doorframe 16, outside an existing external door 12. As seen particularly in fig. 2, the security door 10 comprises openwork 18, having small openings, sufficiently small to prevent an attacker's hand being putthrough them to grab a person opening the door, e.g. having a maximum size 7 cm. by 3 cm.The door 10 may be provided with a lock 20 such that it may also be unlocked from the inside, e.g. by means of knob 22, withoutthe use of a key, e.g. for rapid exit in the event of a fire. The lock 20 may be provided with a self-locking mechanism having a rounded bolt 24. It may be provided with a mortice lock (in the same lock 20 or in a separate lock) with a square-ended bolt 26.

The security door is of metal, particularly steel, more particularly fabricated steel, and in fact as shown in fig.2, principally of wrought ironwork constituting the openwork 18 only some of which is shown in the Fig, for clarity, but which extends overthe whole ofthe areas outlined by the angleirons. Door 10 has an angleiron frame 28, cross support means comprising angleirons 30,30 and a steel sheet panel 32 and the lock 20 is mounted to both panel 32 and the lower angleiron 30. Panel 32 has a letter box opening 34 of size 3 cm. by 13 cm.Door is provided with hinge locks 36 fitting into recesses 38 in door frame 16 and the angleiron frame 28 covers both the hinge locks 36 and the lockplate 37 and lock bolts 24,26 when in the door frame 16. For additional security, hinges 40 of door 10 have welded hinge pins 42.

The ordinary external door 12 opens inwardly as shown by arrow 44. Forthe purposes mentioned above, the whole arrangement may be considered in reverse if arrow 44 is considered to show outward opening and arrow 14 inward opening, though the opening facility afforded by knob 22 will then be absent. It will be apparent from the figs. howtheother modifications mentioned above can be obtained. It will also be apparentthat any one or more of the furtherfeatures mentioned in the appended claims 3 to 16 can be provided optionally in variations of the embodimentshown in the figs.For example, the openwork could be omitted if the security door 10 were of an armoured ortoughened glass, though a sheetofthe latter could be used in addition to the door shown in the figs, as a backingtotheopenwork.

CLAIMS 1. A security door affording visibilitytherethrough that fits outside an external door and is adapted to be unlocked from the outside with a key.

2. A door arrangement comprising an external door and fitted outside it a security door affording visibility therethrough, the arrangement being such that the security door can be unlocked from the outside with a key.

3. A door or arrangement as claimed in Claim 1 or 2, in which the security door opens outwards.

4. A door as claimed in Claim 1 or 3, adapted to fit outside an existing said external door.

5. Adoororarrangementas claimed in any preceding claim, in which the security door comprises openwork.

6. A door or arrangement as claimed in claim 5, in which the openwork comprises only small openings, apart possibly from a letter box opening.

7. A door or arrangement as claimed in claim 6, in which the security door is unlockablefrom inside without a key.

8. A door or arrangement as claimed in any preceding claim, in which the security door is lockable with a mortice lock.

9. A door or arrangement as claimed in any preceding claim, in which the security door is made wholly or principally of metal.

10. A door or arrangement as claimed in claim 9, in which the security door is made wholly or principally The drawing(s) originally filed were informal and the print here reproduced is taken from a later filed formal copy.

**WARNING** end of DESC field may overlap start of CLMS **.

Claims

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Doors and the like This invention relatesto security doors andthe like. These days, a person who opens an external door is vulnerable to attack. By external door is meant one accessible to the public, e.g. an external door of a house, a shop door opening on to the street or a back-yard or, in a block of flats, a door opening onto a corridor outside the flat. As a security measure for such doors, it has been proposed to provide a double door such that the inner door can be opened while the outer door remains locked and affords visibility therethrough. Then, only if the person opening the inner door is satisfied that a visitor is bona fide, need the outer door be opened. The proposal is complicater and not suitable for wide use. According to one aspect ofthe invention there is provided a security door as defined in claim 1. In considering a modification of the latter, a lock might be mounted to the doorpost ratherthantothe door. According to another aspect of the invention there is provided a door arrangement as claimed in claim 2. The invention can also be modified so asto apply to a window, skylight, trap door orthe like. If any ofthese or a door opens outwardly instead of inwardly, the invention can be further modified so that the security door constitutes an inside cover and then serves the somewhat different purpose of providing additional securitywhileallowing the window, skylight, trap door or door still to be visible from inside the premises. Another aspect of the invention consists in a modification as claimed in claim 17. Reference will now be made by way of exampleto the accompanying drawings, in which Fig. 1 is a part horizontal section of a door arrangement embodying the invention; and Fig. 2 is a partial external view of the arrangement shown in Fig. 1. Referring to the drawings, the door arrangement shown comprises a security door 10 affording visibil itytherethroughthatfitsoutside an external door 12 and is adapted to be unlocked from the outside with a key (not shown) inserted through a keyhole 19to operate a lock 20. The security door 10 opens outward, as shown by arrow 14. As will be apparentfrom the figs, the security door 10 is suitable to befitted to an existing doorframe 16, outside an existing external door 12. As seen particularly in fig. 2, the security door 10 comprises openwork 18, having small openings, sufficiently small to prevent an attacker's hand being putthrough them to grab a person opening the door, e.g. having a maximum size 7 cm. by 3 cm.The door 10 may be provided with a lock 20 such that it may also be unlocked from the inside, e.g. by means of knob 22, withoutthe use of a key, e.g. for rapid exit in the event of a fire. The lock 20 may be provided with a self-locking mechanism having a rounded bolt 24. It may be provided with a mortice lock (in the same lock 20 or in a separate lock) with a square-ended bolt 26. The security door is of metal, particularly steel, more particularly fabricated steel, and in fact as shown in fig.2, principally of wrought ironwork constituting the openwork 18 only some of which is shown in the Fig, for clarity, but which extends overthe whole ofthe areas outlined by the angleirons. Door 10 has an angleiron frame 28, cross support means comprising angleirons 30,30 and a steel sheet panel 32 and the lock 20 is mounted to both panel 32 and the lower angleiron 30. Panel 32 has a letter box opening 34 of size 3 cm. by 13 cm.Door is provided with hinge locks 36 fitting into recesses 38 in door frame 16 and the angleiron frame 28 covers both the hinge locks 36 and the lockplate 37 and lock bolts 24,26 when in the door frame 16. For additional security, hinges 40 of door 10 have welded hinge pins 42. The ordinary external door 12 opens inwardly as shown by arrow 44. Forthe purposes mentioned above, the whole arrangement may be considered in reverse if arrow 44 is considered to show outward opening and arrow 14 inward opening, though the opening facility afforded by knob 22 will then be absent. It will be apparent from the figs. howtheother modifications mentioned above can be obtained. It will also be apparentthat any one or more of the furtherfeatures mentioned in the appended claims 3 to 16 can be provided optionally in variations of the embodimentshown in the figs.For example, the openwork could be omitted if the security door 10 were of an armoured ortoughened glass, though a sheetofthe latter could be used in addition to the door shown in the figs, as a backingtotheopenwork. CLAIMS

1. A security door affording visibilitytherethrough that fits outside an external door and is adapted to be unlocked from the outside with a key.

of steel.

11. A door or arrangement as claimed in claim 10, in which the security door comprises fabricated steel.

12. A door or arrangement as claimed in claim 11, in which the security doorcomprises wrought ironwork.

13. A door or arrangement as claimed in any one of claims9 to 12, in which the security door comprises a steel angleiron frame, cross support means comprising steel angleiron and a steel sheet panel, and a lock mounted to the cross support means.

14. Adoororarrangement as claimed in any preceding claim, in which there are provided hinge locks.

15. Adoororarrangement as claimed in any preceding claim, arrangedforthesecuritydoorto coverthe lockplate and lock boltwhen the latter is located in the door frame.

16. A door or arrangement as claimed in any preceding claim, in which the security door is provided with welded hinge pins.

17. A modification of the invention claimed in any preceding claim, except claim 7 or any claim when appendantthereto, adapted from window use instead of door use, in which references to a door arrangement, a security door, an external door, a doorframe, outwards and outside are to be taken as references to a window arrangement, a security cover, an external window, a window frame, inwards and inside, respectively, as the case may be.

18. Asecuritydoororcoverora doororwindow arrangement, substantially according to any example hereinfore described with reference to the accompanying drawings.