GB1563806A

GB1563806A - Window and like rotary deadbolt fasteners

Info

Publication number: GB1563806A
Application number: GB5140075A
Authority: GB
Original assignee: Marston & Co Ltd A
Current assignee: Marston & Co Ltd A
Priority date: 1976-12-15
Filing date: 1976-12-15
Publication date: 1980-04-02

Description

(54) IMPROVEMENTS IN WINDOW AND LIKE ROTARY DEAD-BOLT FASTENERS (71) We, ALBERT MARSTON & COM- r : WY LIMITED, a British Company of Wellineton Works, Planetary Road, Willen hall, West Midlands, WV13 3ST, do hereby declare the invention for which we pray that a patent may be granted to us and the method by which it is to be performed to be particularly described in and by the following statement :- This invention relates to window and ! iks rotary dead-bolt fasteners in which a dead-bolt rotatable between operative and inoperative positions engages in its operative position with a socket or hook of a keeper or co-operates with a wedging action with a surface of a keeper. Such fasteners are hereinafter referred to as"of the kind specified".

The present invention consists in a window or like rotary dead-bolt fastener of the kind described having a housing which supports the rotary dead-bolt and wholly within which there is contained a linearly slid able, key-operated locking member which in the operative position of the dead-bolt is movab ! e relative to the dead-bolt to cooperate with the dead-bolt, or a part rotatable therewith, and lock the dead-bolt in the operative position.

The key for operating the locking member may engage directly with the member.

Catch means may be provided which acts on the locking member to retain it in the operative and inoperative positions when the key is removed. The catch means preferably comprises a spring-loaded ball which is carried by the locking member and engages with either one of two fixed seatings in the housing, the particular seating it engages depending upon whether the locking member is in the operative or inoperative position. Alternatively, the ball may be mounted on the housing and there may be two seatings on the locking member with which the ball is urged to cooperate by spring loading to retain the locking member in the inoperative and operative positions. If desired there could be two balls and only one seating in either arrangement. The spring loading on the ball or balls, or urging the ball or balls to co-operate with the seating or seatings, is arranged to be overcome by the keyoperated movement of the locking member to release the ball or balls from the or each seating.

An embodiment of the invention will now be described by way of example with reference to the accompanying drawings, in which :- FIGURES I nnd ! are respectively front and rear views of a rotary dead-bolt fastener showing the dead-bolt thereof in its operative position, FIGURE 3 is an enlarged section on line 3-3 of Figure 2, and FIGURE 4 is a fragmentary rear view partly in section showing a locking member of the fastener in a locking position.

The fastener shown in the drawings is of the cockspur type for a casement window.

It comprises a housing 1 ; a lever handle 2 rotatably mounted on the housing by a spigot 3; a rotary dead-bolt 4 rigidly keyed radially to the spigot inside the housing and rotatable by the lever handle between an inoperative position in which it is fully disposed in the housing and the operative position shown in which it projects out of the housing, and a locking member 5 slidably mounted in the housing. The spigot 3 is rotatable in a bush 6 preferably of a self-lubricating material such as nylon, fitted to the housing 1.

The housing 1 consists of an extruded, channel-section body 7 having its open side at the back, and a back plate, not shown, which closes the back and opposite ends of the body. The body 7 and back plate may be of metal or a suitable plastics material. Countersunk holes 8 are formed in the front wall of the body near its ends, and there are plain holes in the back plate aligned with the holes in the body. Fixing screws, not shown, for securing the fastener to a window are passed through the holes 8 and the holes in the back plate. The screws restrain the back plate from moving relative to the body. A slot 9 is formel in one side wall of the body for the rotary dead-bolt 4 to project through when in the operative position. On the lonoitudinal centre-line of the front wall of the bodv, between the spigot 3 and the countersunk hole 8 at one end of the wall, there is a keyhole 10. Narrow grooves 11 in the inside faces of the side wall of the body near their rear edges extend longitudinally of those walls.

At the edge of the radially inner end, which is widened to receive the spigot 3, the rotary dead-bolt 4 has an abrupt shoulder 12 extending parallel to the rotational axis of the spigot. When the deadbolt is in the operative position the shoulder 12 is adjacent the locking member 5. In the operative position one radial edge of the rotary dead-bolt abuts against one end of the slot in the body side wall, and a peripheral flat face 13 of the inner end of the dead-bolt is disposed closely adjacent to the other side wall of the body.

The locking member 5 is an oblong block, of metal or plastics, of rectangular cross-section formed with a notch 14,15 in each of two opposite longer sides. The locking member extends and slides longi tudinally alongside the body side wall which contains the slot 9. At the side remote from that side wall the locking member is guided in its sliding movement and supported by an L-shaped support member 16, best seen in Figure 3. One longer flange 17 of the support member 16 extends laterally from the locking member 5 to the other body side wall and is spaced from the front wall of the body by the other, shorter, flange 18 of the member which is disposed alongside that other side wall. A spring metal retaining plate 19 retains the locking member and support member 16 in the body. The retaining plate 19 extends across the body and is secured by engagement of its side edees in the grooves 11 in the side walls. The retaining plate has a small domed protuberance 20 which mates with a complementarv hollow, not shown, in the longer flange 17 of the support member 16 to position the two parts correctly together. There is a houle 21 in the longer hanse and a resistering slot 22 in the re taining plate through which one of the fixina screws passes when the fastener is secured to a window. The screw prevents the parts from moving in the body. Also registering apertures 23 and 24 are provided respectively in the longer flanse and retaining plate 19 opposite the keyhole 10 to support the inner end of a ward key when it is inserted in the keyhole.

The one notch 14 in the locking member is directe towards the keyhole and is arranged to receive the blade 25, Figure 4, of the key for operating the bolt. The key moves the locking member between a free position, as shown in Figure 2, in which the locking member is spaced from the rotary dead-bolt 4 and the latter is free to turn, and a locking position, Figure 4, to which the locking member is moved when the dead-bolt is in its operative position and in which the locking member overlaps the shoulder 12 of the dead-bolt, and thereby prevents the dead-bolt from being turned.

The locking member is positively retained in either position to which it is moved by means of a spring catch arrangement housed in the other notch 15 of the locking member. Two metal balls 26 and a helical compression spring 27 acting between the balls are located in the notch, as shown in Figure 3. One ball is urged towards the retaining plate 19 and the other is urged towards the front wall of the body. The first-mentioned ball engages shallowly in either one of two seating recesses 28 in the adjacent edge of the retaining plate, according to the position of the locking member, and in so doing restrains the locking member from unintentional movement. The spring action on the ball is readily overcome by key-operated movement of the locking member.

For convenience in manufacture the locking member and retaining plate are made for assembly in the body to suit either hand of action of the handle and rotary deadbolt. It will be seen in Figure 2 that there are two further seating recess 28'in the opposite edge of the retaining plate which are for this purpose.

The fastener described is cheap and simple to manufacture and assemble as it has few component parts, and yet it enables the window to which it is fitted in use to be securely locked.

Claims

WHAT. WE CLAIM IS :-

1. A window or like rotarv dead-bolt fastener of the kind described having a housing which supports the rotary deadbolt and wholly within which there is contained a linearly slidable, key-operated locking member which in the operative position of the dead-bolt is movable relative to the dead-bolt to co-operate with the dead-bolt, or a part rotatable therewith, and lock the dead-bolt in the operative position.

2. A fastener according to Claim 1 wherein the locking member is disposed to one side of a keyhole in the housing for the key for operating the locking member, and the locking member has a notch directed towards the keyhole arranged to be engaged by the key for sliding the locking member between the operative and inoperative positions by rotation of the key.

3. A fastener according to Claim 2 wherein the locking member is guided in its sliding movement by a wall of the housing and an opposed support member located in the housing.

4. A fastener according to Claim 3 wherein the locking member and support member are retained in the housing by a retaining plate extending over the locking member and support member and engaged with locating grooves in said wall of the housing and another, oppose, wall of the housing.

5. A fastener according to Claim 4 wherein the housing, support member and retaining plate have registering apertures therein for a fixing screw for securing the fastener to a support in use.

6. A fastener according to Claim 4 or Claim 5 wherein the support member and retaining plate have apertures therein opposite the keyhole arranged to receive and support the inner end of the key when the key is inserted in the keyhole.

7. A fastener according to any preceding claim wherein the rotary dead-bolt has a shoulder extending parallel to the rotational axis of the dead-bolt and which shoulder abuts against the locking member when the rotary dead-bolt and the locking member are in their operative positions, the locking member thereby preventing rotation of the rotary dead-bolt in the direction for moving the latter from the operative position to the inoperative position.

8. A fastener according to any preceding claim wherein catch means is provided in the housing which acts on the locking member to retain the locking member in operative and inoperative positions.

9. A fastener according to Claim 8 wherein the catch means comprises a springloaded ball carried by the locking member which engages with a first fixed seating in the housing when the locking member is in its inoperative position, thereby to retain the locking member in that position, and engages with a second fixed seating in the housing when the locking member is in the operative position to retain the locking member in the operative position, the spring ! oading on the ball being arranged to be overcome by the key-operated movement of the locking member to release the ball from the seatings.

10. A fastener according to Claim 8 as dependent from any of Claims 4 to 6 wherein the catch means comprises a springloaded ball mounted in a notch in the locking member and urged by the spring trans versely of the direction of sliding movement of the locking member and towards the retaining plate, and the retaining plate has first and second seating recesses with which the ball is releasably engageab ! e, the ball engaging with the first seating recess when the locking member is in its inoperative position, thereby to retain the locking member in that position, and engaging with the second seating recess when the locking member is in the operative position to retain the locking member in the operative position, and the spring loading on the ball being arranged to be overcome by the key-operated movement of the locking member to release the ball from the seat ings.

11. A fastener according to Claim 8 wherein the catch means comprises a ball mounted in the housing which engages with respective seatings in the locking member to retain the locking member in the inoperative and operative positions, the ball being urged to co-operate with the seatings by spring loading arranged to be overcome by the key-operated movement of the locking member to release the ball from the seatings.

12. A fastener according to Claim 8 wherein the catch means comprises on either one of the locking member and housing a seating, and on the other one of those parts two balls one of which engages with the seating when the locking member is in the inoperative position, thereby to retain the locking member in that position, and the other one of which balls engages with the seating when the locking member is in the operative position so as to retain the locking member in the operative position, the balls being urged to co-operate with the seating by spring loading arranged to be overcome by the key-operated movement of the locking member to release the balls from the seating.

14. A window rotary dead-bolt fastener substantially as described herein with reference to and as illustrated by the accom panying drawings.