1989-08-14
1991-08-13
Nicholson, Eric K.
Closure fasteners
Braces
292762, E05C 1730
Patent
active
050391470
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
This invention relates to door stays for use as security devices for the purpose of restricting unauthorised entry through a door to which it is fitted. Presently, many attacks on elderly or other defenseless persons living along are being experienced. Such attacks often occur in the home by an assailant forcing open the door after the person has opened it to enquire the caller's business. Also, attacks in the home are being experienced by able-bodied persons in the evenings or during the early hours of the mornings while they are resting.
Heretofore, security devices have been provided for such purposes, however they have suffered from the disadvantage that either they do not permit the door to be slightly opened to allow the inhabitant to enquire the business of the visitor, or if they do, the device does not withstand substantial force being applied against it. One example of the latter type is a security chain in which, with enough force, the screws securing the chain keeper to the door post or frame can be pulled out, therefore rendering the security device useless
An object of the present invention is to provide a doorstay for use as a security device which will obviate or mitigate the aforesaid disadvantage.
Accordingly, the present invention is a doorstay comprising a stay having a determined length retraction, the stay being pivotally mountable at one end to a first bracket to be secured to a surface against which the door is opened, and at the other end locatable into a second bracket to be secured on the inside of the door.
Preferably, the second bracket has an open passage terminating in a blind bore, the other end of the stay intended to rest on the wall of the open passage but enter the bore on opening of the door to which the stay and second bracket are fitted.
Preferably also, the stay allows two predetermined short amount of movements, a first free movement followed by a movement against biasing. The biasing is preferably resilient.
Preferably further, an attention attracting means is provided including warning means with an electrical circuit having a contact switch and a reset switch, together with a power supply, with the contact switch operating with retractible movement of the stay. The circuit is preferably housed in a casing with the reset switch mounted on the outside of a removable front lid. The power supply is preferably batteries which are housed in the casing. The warning means may be either audible or visual or both.
BRIEF DESCRIPTION OF THE DRAWINGS
An embodiment of the present invention will now be described, by way of example, with reference to the accompanying drawings, in which:
FIG. 1 is a front elevation of the inside of a doorway having a door with a doorstay according to the present invention fitted thereto;
FIG. 2 is a plan view of the view shown in FIG. 1;
FIG. 3 is a enlarged plan view of a second bracket;
FIG. 4 is an exploded perspective view of the doorstay;
FIG. 5 is an electric circuit block diagram for operation of warning means of the doorstay; and
FIG. 6 is an enlarged plan view of the second bracket of FIG. 3, as modified.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
Referring to the drawings, a doorstay is shown in FIGS. 1 and 2 fitted between a door 16 and a surface ie. a wall 14. The doorstay comprises a length retractible stay 10 formed by two members 10A, 10B in telescopic relationship. The stay 10 is pivotally mountable by pin 9 at one end (referred to in the following as the distal end of member 10A to a first bracket 12 to be secured to the wall 14 against which the door 16 is to be opened. One end of member 10B distal from member 10A of the stay 10 is locatable into a second bracket 18 to be secured on the inside of the door 16. Member 10B at its distal end has an extension 10C which engages the second bracket 18. The extension 10C is connected to the member 10B through an external screw thread on the former engaging an internal screw thread in the latter. This screw threaded engagement enables a length exte
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McCrea George W.
Moon Alan
McCrea George Windsor
Nicholson Eric K.
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