GB2286425A - Bolt lock casing for a door, window or the like - Google Patents

Abstract

The invention relates to a bolt lock 1 aimed at being embedded into a groove 10 made in the front edge 3 of a stile 4 or rail of a frame of a door, window or the like, comprising a control mechanism 13 accommodated within a casing 14 made integral with a face-plate 11 at the rear side 15 of which slide one or several operating rods 9. This bolt lock is particularly characterized in that the longitudinal axis of the casing is oriented perpendicularly to the axis of the operating rod or rods and in that this casing is capable of being located within a recess made in a rail 22 or stile, respectively, extending perpendicularly to the stile 4 or rail, respectively, receiving the operating rod or rods 9. <IMAGE>

Description

2286425 ENCASEMENT FOR BOLT LOCK AND BOLT LOCK FOR A DOOR WINDOW OR THE

LIKE The invention relates to a bolt lock aimed at being embedded into a groove made in the front edge of a stile or rail of a frame of a door, window or the like, comprising a control mechanism accommodated within an encasement made integral with a face-plate at the rear side of which slide one or several operating rods, said control mechanism including:

- a door-knob hole through which an operating handle or button can act on at least the operating rod or rods and a spring-bolt, - and a key member acting on at least means for locking the operating rod or rods in locked position.

is This invention will find its application in the field of the building ironmongery.

As a mater of fact, there are already known a number of bolt locks which meet the above description. Thus, such a bolt lock, as its name says, includes one or several operating rods moving in opposite directions or in the same direction, this under the action of a control mechanism on which acts the user, viz. through an operating handle.

In addition, such a bolt lock necessarily F integrates a key member which provides same with the notion of safety. Thus, this key member can e.g. act on a dead bolt and, in order to improve the notion of safety, on locking means which are aimed at immobilizing the operating rod or rods in locked 30 position.

It should be noted that it is already known to combine the notion of the dead bolt and of locking the operating rods in locked position through the drum-type key member.

In addition, in order to avoid the unlocking from being able through a direct action on the locking organs, such as the dead lock, or even on the means for locking the operating rods in locked position, with this key member is often associated a safety device aimed at locking the dead bolt or said means for locking in unlocked and/or locked position. More particularly, when actuated by the web of the key member, it releases the dead bolt or said locking means the movement of which can then be ensured through the web.

Other functions may of course be assigned to this key member, such as the movement of the operating rod or rods.

In all cases, this control mechanism is accommodated within an encasement which, when the bolt lock is aimed at being embedded, is positioned in a cut out or in an opening made in the front edge of the stile or the rail of the leaf of a door, window or the like. In such circumstances, the operating rod or rods move in a groove extending along this edge of the leaf, at the rear side of a face-plate closing this groove and which the encasement integrating the control mechanism is made integral with.

As a matter of fact, the problem of these bolt locks aimed at being embedded is related to the size of the encasement. More particularly, inside this encasement the control members, such as the door-knob hole on which the operating handle and the key member allow to act, are located in a plane parallel to the operating rod or rods. This provides this encasement with a height larger than the width. This does not impede the cross- section of the stile or rail aimed at receiving the bolt lock from having to be large enough to allow for the accommodation of said encasement.

However, because of the cost of material as well as, in the particular case of windows and French windows, in order to increase as much as possible the 1 glazed area, one is constantly looking for means allowing to reduce the cross-section of these stiles and rails by reducing as much as possible the size of the encasement. In this respect, an optimum has now been reached at that level in that by reducing even more the width of the encasement, one cannot but reduce the size of the components of the control mechanism, so that same can no longer meet the requirements of strength and long lifetime required in the field.

Accordingly, the problem of the cross-section of the stiles and rails a leaf is comprised of remains and no solution can be found.

As a matter of fact, this invention allows in particular to solve this problem by providing the bolt lock with those features, at the level of either the encasement or the control mechanism or even of the arrangement with respect to each other of the components same is comprised of, which allow to do so that said control mechanism and its encasement can be positioned inside a rail or a stile, respectively, perpendicular to the stile or the rail into which are embedded the operating rods.

More particularly, by means of the features of the invention it is possible to make use of the space, in depth, obtained by the intersection of a rail and a stile to accommodate the encasement of the bolt lock.

Finally, as this will become obvious during the description which follows, the stile or the rail along which extend the bolt lock and viz. the operating rods can be considerably reduced since they finally have to receive only said operating rods and the face-plate covering same, as well as the fillister necessary for installing a glazed or filling panel, depending on whether a glazed leaf is concerned or not.

Thus, the invention relates to a bolt lock aimed at being embedded into a groove made in the front edge of a stile or rail of a frame of a door, window or the like, comprising a control mechanism accommodated within an encasement made integral with a face-plate at the rear side of which slide one or several operating rods, said control mechanism including:

- a door-knob hole through which an operating handle or button can act on at least one operating rod and a spring-bolt, - and a key member acting on at least means for locking the operating rod or rods in locked position, characterized in that the longitudinal axis of the encasement is oriented perpendicularly to the axis of the operating rod or rods and in that this encasement is capable of being located within a recess made in a rail or stile, respectively, extending perpendicularly to the stile or rail, respectively, receiving the operating rod or rods.

The advantages resulting from this invention obviously reside in the possibility of fitting the leaves of doors or windows, the cross-section of the profiles the stiles and rails of which are comprised of is particularly reduced, with a bolt lock which does fall short neither at the level of mechanical strength or long lifetime nor at the level of safety, since it provides all the features absolutely required in this respect.

other aims and advantages of this invention will become obvious during the description which follows and relates to one embodiment which is given only by way of an indicative and non-exhaustive example.

The understanding of this description will be made easier with reference to the attached drawings in which:

- Figure 1 is a schematical view of a window the leaf of which is fitted with a bolt lock according to the invention, 1 - Figure 2 is a schematical and cross-sectional partial view of the bolt lock according to the invention embedded in a leaf as shown in Figure 1, - Figure 3 is a view analogous to Figure 2 and in which have been mentioned the reference numerals beyond so, - Figure 4 is a cross-sectional view according to IV-IV of Figure 2 and corresponding to a first embodiment, - Figure 5 is a view similar to Figure 4, however corresponding to a second embodiment.

This invention relates to a bolt lock more particularly shown in Figures 2 and 3. It is aimed at being embedded in a groove 10 made in the front edge 3 e.g. of a stile 4 of the frame of the leaf 5 of a window, French window 6 or the like, as can be seen in Figure 1.

Of course, depending on the position of the leaf, such a bolt lock 1 can as well be embedded in one of the upper 7 or lower rails 8 of such a leaf 5.

This bolt lock 1 includes at least one operating rod 9 axially moving in said groove 10 at the rear side of a face-plate 11 which closes same. Such an operating rod 9 acts on locking organs (not shown) passing through openings made in the face-plate 11 and capable of co- operating with keepers the adjacent stile of either the sash-frame 12, as shown in Figure 1, or an adjacent leaf is provided with.

The bolt lock 1 also includes a control mechanism 13 accommodated in an encasement 14 made integral with the rear face 15 of the face-plate 11 through appropriate fixing means, such as screws 17, rivets and/or positioning studs 18.

It should be appreciated that in front of the fixing means 16 connecting the encasement 14 to the face-plate 11 the operating rod 9 has slots 19 allowing the aforementioned connection and hence the passing through of the fixing means 16, without therefore impeding the longitudinal movement of the operating rod 9.

As a matter of fact, according to a feature of this invention, the longitudinal axis 20 of the encasement 14 is oriented perpendicularly to the axis of the operating rod 9. In addition, it is positioned in a recess 21 made at the intersection of the stile 4 and a rail, in this case an intermediate one 22, and extending inside this latter.

In some way, the recess 21 aimed at receiving the encasement 14 of the lock bolt 1 is made in one of the rails 7, 8, 22 or in one of the stiles, respectively, extending perpendicularly to the stile 4 or the rail, respectively, at the level of which is embedded said operating rod 9.

The advantage resulting from such an arrangement resides in that the cross-section 23 of the stile 4 or the rail receiving the bolt lock 1 does no longer depend on the width of the encasement 14.

As regards the control mechanism 13, it includes a door-knob hole 24 rotatingly fitted in the encasement 14 and including, at its centre, an opening 25 with a cross-section adapted to that of an operating square corresponding to an actuating handle 26 or button, as shown in Figure 1. This door-knob hole 24 is submitted to springy restoring means 27, so that upon locking or unlocking control through the handle 26, this latter and, hence, the door-knob hole 24 return to their initial resting position.

More particularly, it should be possible, through this actuating handle or this button 26, and thus through the door-knob hole 24, to act on the operating rod 9, but also on a spring-bolt 28 the head 29 of which partly projects out of the face-plate 11, through 1 an appropriate opening at the level of this latter.

Thus, the door-knob hole 24 includes a first actuating finger 30 which is capable of acting on the shaft 31 of the spring-bolt 28. It should be noticed that on this shaft 31 of the spring-bolt 28 also act springy restoring means 32 the function of which, once the action on the door-knob hole 24 has been released, is to systematically bring said spring-bolt 28 back into a protruding position with respect to the face-plate 11. On the other hand, a thrust 33 made in the encasement 14 limits the forward movement of the spring-bolt 28 and, hence, the protruding length of the head 29 with respect to said face-plate 11.

However, with a view to authorize the reversibility of the bolt lock 1, this head 29 of the spring-bolt 28 may, through known springy restoring means 34A, be completely pulled out of the face-plate 11, so that it may be pivoted by 1800, thus allowing a left-hand or right-hand application onto a leaf of a door, window or the like.

As regards the action of the door-knob hole 24 on the operating rod 9, this occurs through a rider 34 capable of moving in the encasement 14, perpendicularly to the longitudinal axis of the operating rod 9, while ensuring the driving of this latter through bent driving means 35. More particularly, this rider 34 includes, at its rear end 36, a tongue 37 on which are capable of acting two actuating fingers 38, 39, respectively, the door-knob hole 24 is provided with and this depending on one being in locking or unlocking phase. It should be noticed that both actuating fingers 38, 39 keep between each other a distance 40 allowing an idle stroke of the door-knob hole 24 with respect to said rider 34. As a matter of fact, this idle stroke allows the actuating handle or button 26 to return to its initial resting position under the action of the springy restoring means 27 after the locking or unlocking control of the operating rod. In addition, this idle stroke authorizes the drawing back of the spring-bolt 28 without movement of the operating rod or rods 9, viz. when same are unlocked.

The guiding of this rider 34 inside the encasement 14 is ensured by appropriate means at the level of this latter, such as grooves, guiding walls or the like.

As regards the bent driving means 35, these may be of the gear type. Thus, the rider 34 may be provided with a rack which rotatingly controls a toothed wheel acting on another rack associated either directly with the operating rod 9 or with a rider parallelly acting on this latter. A lever system may as well be contemplated.

However, within the framework of the embodiment contemplated more particularly in Figures 2 and 3 of the attached drawing, these bent driving means 35 are formed by at least one flexible blade 41 adopting a 11L11-shaped configuration, one end 42 of which is made integral with the rider 34, while the opposite end 43 is connected through appropriate means either directly or indirectly to the operating rod 9. Here too, the movement imparted to this flexible blade 41 through the rider 34 is guided by means of appropriate guiding means 44 the encasement 14 is provided with.

As a matter of fact, the advantage of such a solution is that it is little voluminous. Thus, the encasement 14 includes, at its front portion 45, a wing 46 extending perpendicularly to its longitudinal axis and defining an elongated recess 47 inside which can be positioned one leg 48 of the 11L11-shaped flexible blade. Such an arrangement therefore authorizes the connection of the end 43 of this flexible blade 41 to the operating rod 9. Finally, through the particular configuration of the bent driving means 35, this wing 0 -g- 46 of the encasement 14 creates only a reduced size at the level of the groove 10 receiving the bolt lock 1.

For reasons of symmetry, however mainly with a view to improve the quality of the connection of the face-plate 11 to the encasement 14 and to thus increase the rigidity of the bolt lock 1, and also that of the leaf 5, as will appear further in the description, the encasement 14 may be provided with another wing 49 on the side opposite to the wing 46. Moreover, the additional location inside the encasement 14 resulting from this wing 49 allows to contemplate, as shown in Figure 2, to provide in the throughpassing operating rod 9 a setback 50 inside which the head 29 of the spring-bolt 29 can position itself when drawing back.

Of course, this invention is in no way limited to such a configuration of operating rods 9. Thus, instead of being a throughpassing one, it may be divided into two operating rods connected by appropriate driving organs capable of authorizing the drawing back of the spring-bolt 28.

Likewise, there can be contemplated to fit the bolt lock 1 with two operating rods moving in opposite direction, the rider 34 acting in such circumstances on bent driving means 35 acting in opposite directions.

Viz., within the framework of the embodiment shown in Figure 2, the rider 34 may act on two 11L11-shapedly bent flexible blades, so that one joins the operating rod extending downwards and the other one joins that extending in the opposite direction. One can also contemplate the combination of bent driving means of a different configuration to reach this result.

As a matter of fact, the possibility of integrating the encasement 14 of the bolt lock 1 into a rail 22 which joins the stile 4 provided with said bolt lock 1 also depends on the arrangement of the control mechanism inside this encasement 14.

As can be seen in Figure 3, according to the invention the key member 51 this bolt lock 1 is fitted with and the door-knob hole 24 are Dlaced in the same alignment perpendicular to the axis of the operating rod or rods 9. More particularly, this key member 51 and the door-knob hole 24 are so arranged that their axes 52, 53 are parallel to each other and arranged substantially in a plane perpendicular to this axis of the operating rod 9.

Finally, it is just because of this arrangement side by side of the key member 51 and the door-knob hole 24 that the height of the encasement 14 can be adapted with respect to the cross- section 54 of said rail 22.

is This being stated, such an arrangement offers the possibility of successively arranging at the rear of the operating rod 9 either the key member 51 and the door-knob hole 24 or, reversely, the door-knob hole 24 and the key member 51. The election of either of these solutions is laid on by reasons of conveniency. Thus, according to the embodiment shown in Figures 2 and 3, one observes the presence of the key member 51 between the operating rod 9 and the door-knob hole 24. Such an arrangement is particularly advantageous when the bolt lock 1 is integrated into a vertical stile 4 of a leaf 5 of a door, window or the like 6, so that its encasement 14 horizontally extends inside an upper 7 or lower rail 8 or even an intermediate rail 22. In such an arrangement the handle 26 is indeed horizontal in resting position and can eventually impede the access to the key member 51 should this be located behind the door-knob hole 24, i.e. according to a reversed arrangement with respect to the one shown in Figures 2 and 3.

It is furthermore to be observed that the mode of transmitting the movement of the door-knob hole 24 to f the operating rod or rods 9 through a rider 34 and bent driving means 35 as described above particularly applies to such an arrangement since it effectively allows to sidely offset said door-knob hole 24 as much 5 as necessary.

As regards more particularly the key member 51, its function is viz. that of acting on locking means 55 aimed at immobilizing the operating rod or rods 9 in locking position.

As a matter of fact, these locking means 55 may act either directly on one operating rod 9 when these are immediately juxtaposed to same or on one of the driving means 34, 35 connecting the door-knob hole 24 to the operating rod or rods 9. The embodiment shown in Figures 2 and 3 and described hereafter corresponds to a larger extent to this second solution. More particularly, by means of the web 56 the drum-type key member 51 is proved with can be driven a slide 57 guided in movement inside the encasement 14 and including a locking bolt 58 capable of positioning itself in an opening 59 made in the rider 34 when the operating rod or rods 9 are in locking position. As a matter of fact, the opening 59 positions itself in front of the locking bolt 58 only after having actuated the door-knob hole 24 with a view to the locking.

It should be noticed that these locking means 55 may be provided with a burglar-proof type safety device 60 as known per se. More particularly, such a safety device 60 is aimed at impeding the locking bolt 58 from withdrawing under a direct action on this latter or on either organ it immobilizes in translation. Thus, such a safety device 60 generally includes a locking foot 61 which is springily restored into locking position. This locking foot 61 is provided with a toothing 62 meshing a correspondingly shaped toothing 63 provided for at the level of the slide 57.

Thus, when actuating the key member 51, the web 56 this latter is provided with causes in a first time the locking foot 61 to raise and, accordingly, its toothing 62 to disengage from the toothing 63 of the slide 57.

This latter can then be pushed back in direction of the rider 34 under the action of said web 56. As a matter of fact, such a safety device 60 immobilizes the locking means 55 both in locked and in unlocked position.

This being set forth, it should be clearly stated that the invention is in no way limited to such an arrangement of the key member 51 between the operating rod 9 and the door-knob hole 24. Viz., the key member 51 may perfectly be positioned at the rear of the door-knob hole 24, so that the locking means 56 it is associated with co-operate with the rider 34 which one will have taken care to extend to reach this key member 51 and, in particular, said locking means 55.

According to the state of technique, the drum forming the key member 51 is so implanted in the encasement of the bolt lock that its vertical median plane be parallel to the axis of the operating rod or rods. Furthermore, it is immobilized in axial translation inside this encasement through a fixing screw perpendicularly inserted from the front edge 3 of the stile 4 and passing through the face-plate 11.

More particularly, this fixing screw, which is accessible only when the leaf is half open, fixes itself into a tapped hole made in the lower portion of the body corresponding to this barrel.

It is however obvious that such an arrangement of the key member generates a size in a direction parallel to the operating rods which is larger than that produced in a perpendicular direction.

Thus and according to the invention, the key member 51 is so arranged in the encasement 14 that its vertical median plane be oriented perpendicularly to the axis of the operating rod or rods 9. In addition, a bolt lock 1 provided with such a so oriented key member 51 includes means 64 for immobilizing the key member 51 in axial translation inside the encasement 14 and acting in a direction perpendicular to the median plane of said key member 51 under the action of control means 65 accessible from the inner face 66 and/or the outer face 67 of the encasement 14.

As a matter of fact, it should be observed that within the framework of an intermediate rail 22 this latter necessarily receives, at the level of its side edges 68, 69, either a cladding panel or a glazing, so that no fixing screw can be inserted into the encasement 14 from either of these side edges 68, 69 with a view to immobilize the key member 51 in axial translation.

According to the embodiment according to Figures 2 to 5 of the attached drawings the means 64 for immobilizing the key member 51 in axial translation are formed by locking members, in this case balls 70, 71 sliding in recesses 72, 73 made in the encasement 14 on both sides of the recess 74 aimed at receiving the key member 51. More particularly, the recesses 72, 73 are made in the encasement 14 so that their protruding end 75 corresponds to the tapped bore 76 transversally machined in the lower portion of the body of the key member 51 when this latter is more particularly inserted into its recess 74 inside the encasement 14. 30 Thus, in such a position the locking members, such as balls 70, 71 arranged in the recesses 72, 73, are capable of inserting, at least in part, on both sides into this bore 76 of this key member 51, this under the action of the actuating means 66. According to the embodiment shown in Figure 4, these are in the shape of screws 77 with truncated tip 78 provided for in tapped openings 79 with an axis perpendicular to the plane of the encasement 14 and ending into one of the recesses 72, 73.

Thus, by acting on these screws 77 so as to have their truncated tip 78 penetrate farther into the corresponding recess 72, 73, the locking members, viz. the balls 70, 71 co-operating with this truncated tip 78, are pushed back in direction of the key member 51, so as to partly penetrate into the tapped bore 76 and thus immobilize this key member 51 in axial translation.

As already stated with respect to the spring-bolt 28, the bolt lock 1 is preferably reversible. For this purpose, the tapped openings 79 made at the level of the encasement 14 are advantageously through-openings which cross the recesses 72, 73, as shown in Figure 6 corresponding to a second embodiment. In addition, the screws 77 have in this case a symmetrical configuration with respect to their transversal median plane 80 and include, in their median portion, a peripheral groove 81 with truncated walls, while the ends 82, 83 are threaded and co-operate with said tapped openings 79 made in the encasement 14.

Thus, by means of a screwdriver-type tool it is possible to have access to the screws 77 on both sides of the encasement 14. However, only the inner side of the profile forming the rail inside which is inserted the encasement 14 is preferably provided with openings allowing the access to the screws 77, this of course with a view to impede the key member 51 from being taken out from outside.

In this respect, in order to carry out the taking out of the key member 51, it is enough to act on the screws 77, so that the bottom of the groove 81 be substantially in the axial extension of the locking means, in this case of the balls 70, 71, authorizing 0 1 same to withdraw inside their respective recess 72, 73 when taking out the key member 51.

In order to impede the balls 70, 71 from escaping in the absence of the key member 51, a slight crimping is provided for at the level of the protruding end 75 of the recesses 72, 73, this upon introduction of said balls 70, 71. Here too, these latter are placed only after fitting of the screws 77 into their respective openings 79. Finally, if the aforementioned crimping impedes the balls 70, 71 from escaping, it also limits the protruding length of these balls 70, 71 inside the recess 74 corresponding to the key member 51. Therefore, these balls 70, 71 can also impede the screws 77 from fully drawing back. Hence, one understands that during the mounting are inserted first of all the screws 77. Then, the balls 70, 71 are positioned in their respective recess 72, 73, before the protruding end 75 of these latter be crimped. 20 The advantages resulting from this invention are obvious, i.e. a minimum size of the encasement of the bolt lock and, accordingly, of its mechanism in the stile or the rail in which it is embedded. Furthermore, through a judicious arrangement of the components the control mechanism of this bolt lock is comprised of the encasement can in fact of positioned in the rail or the stile, respectively, which is intersected by the stile or rail, respectively, along which extends the operating rod.

In addition, it is advantageous to observe that this so arranged bolt-lock encasement plays a not inconsiderable role from the point of view of the mechanical strength of the leaf in that it allows to rigidify the connection between a rail and a stile.

In all cases, this bolt lock offers the possibility of considerably reducing the cross-section is of the profiles the frame of the leaf is comprised of and, accordingly, in the case of a window, this results into an appreciably increased glazed space.

In view of this, this invention should be considered as constituting an important technical progress with respect to the state of technique.

Although the invention has been described in relation with a particular embodiment, it is obvious that it is in no way limited to same and that various modifications of shapes, materials and combinations of these various elements can be implemented without therefore departing from the framework and the spirit of the invention.

Claims (19)

1. Bolt lock aimed at being embedded into a groove 1,10) made in the front edge (3) of a stile (4) or rail (7, 8) of a frame (5) of a door, window or the like (6), comprising a control mechanism (13) accommodated within an encasement (14) made integral with a face-plate (11) at the rear side of which slide one or several operating rods (9), said control mechanism (13) including:

- a door-knob hole (24) through which an operating handle or button (26) can act on at least one operating rod (9) and a spring-bolt (28), - and a key member (51) acting on at least means (55) for locking the operating rod or rods (9) in locked position, characterized in that the longitudinal axis (20) of the encasement (14) is oriented perpendicularly to the axis of the operating rod or rods (9) and in that this encasement (14) is capable of being located within a recess (21) made in a rail (22) or stile, respectively, extending perpendicularly to the stile (4) or rail, respectively, receiving the operating rod or rods (9).

2. Bolt lock according to claim 1, characterized in that the door-knob hole (24) acts on a rider (34) moving in the encasement (14) perpendicularly to the longitudinal axis of the operating rod or rods (9) and ensuring the driving of this or these latter through bent driving means (35) of the gear, lever-arm and/or flexible-blade (41) type.

3. Bolt lock according to claim 2, characterized in that the rider (34) includes, at its rear end (36), a tongue (37) on which are capable of acting two actuating fingers (38, 39), respectively, the door-knob hole (24) is provided with and keeping between each other a distance (40) allowing an idle stroke of this door-knob hole (24) with respect to said rider (34).

4. Bolt lock according to claim 2, characterized in that the bent driving means (35) are formed by at least one flexible blade (41) adopting a 11L11-shaped configuration, one end (42) of which is made integral with the rider (34), while the opposite end (43) is directly or indirectly connected to the operating rod or rods (9).

5. Bolt lock according to any one of claims 2 to 4, characterized in that it includes bent driving means (35) capable of imparting to the operating rods a direction of movement opposite to each other.

6. Bolt lock according to claim 5, characterized in that the bent driving means (35) are comprised of at least two "LII-shaped flexible blades one of which joins a first operating rod and the other one joins the second operating rod moving in opposite direction.

7. Bolt lock according to any one of claims 2 to 6, characterized in that the bent driving means (35) are comprised of the combination of at least one flexible blade (41) and one or several lever arms or gears for controlling the movement of two operating rods in opposite directions under the action of the door-knob hole (24) on the rider (34).

8. Bolt lock according to any one of claims 1 and 4, characterized in that the encasement (14) includes, at its front portion (45), a wing (46) extending perpendicularly to its longitudinal axis (20) and defining an elongated recess (47) inside which is positioned one leg (48) made integral with an operating rod (9) and corresponding to the 11L11- shaped flexible blade (41).

9. Bolt lock according to any one of claims 1 to 7, characterized in that the encasement (14) includes, at its front portion (45), two wings (46, 49) extending f I r 19- symmetrically and perpendicularly to the longitudinal axis (20) of this encasement (14), these wings (46, 49) defining an elongated recess (47) at the rear of the face-plate (11).

10. Bolt lock according to any one of claims 1 to 9, characterized in that the key member (51) and the door-knob hole (24) are so arranged that their axes (52) and (53), respectively, are parallel and are located substantially in a plane perpendicular to the 10 axis of the operating rod or rods (9).

11. Bolt lock according to claim 10, characterized in that the key member (51) is arranged between the operating rod (9) and the door-knob hole (24).

12. Bolt lock according to claim 1 and any one of claims 2, 3, 10 and 11, characterized in that the locking means (55) are formed by a slide (57) including a locking bolt (53) capable of positioning itself in an opening (59) made in the rider (34) when the operating 20 rod or rods (9) are in locked position.

13. Bolt lock according to claim 12, characterized in that it includes a safety device (60) capable of immobilizing the locking means (55) in locked or unlocked position.

14. Bolt lock according to any one of claims 1 to 3, characterized in that the key member (51) is so arranged in the encasement (14) that its vertical median plane is oriented perpendicularly to the axis of the operating rod or rods (9), said bolt lock (1) including means (64) for immobilizing the key member (51) in axial translation inside said encasement (14) and acting in a direction perpendicular to the median plane of said key member (51) under the action of control means (65) accessible from the inner face (66) and/or the outer face (67) of the encasement (14).

15. Bolt lock according to claim 14, characterized in that the means (64) are formed by locking members, such as balls (70, 71), sliding in recesses (72, 73) made in the encasement (14), on both sides of the recess (74) of the key member (51), so that the protruding end (75) of these recesses (72, 73) corresponds to a bore (76) transversally machined in the lower portion of the body of the key member (51), authorizing the at least partial insertion of the locking members (70, 71) into this bore (76) of this key member (51), this with a view to immobilize this latter in axial translation.

16. Bolt lock according to claims 14 and 15, characterized in that the control means (65) are in the shape of screws (77) with truncated tip (78) provided for in tapped openings (79) with an axis perpendicular to the plane of the encasement (14) and ending into one of the recesses (72, 73) so as to co-operate through their truncated tip (78) with said locking members (70, 71).

17. Bolt lock according to claim 16, characterized in that the tapped openings (79) made at the level of the encasement (14) are throughpassing while intersecting the recesses (72, 73), the screws (77) having a symmetrical configuration with respect to their transversal median plane (80) and including, at their median portion, a peripheral groove (81) with truncated walls while their ends (82, 83) are threaded and co-operate with the tapped openings (79).

18. Bolt lock according to claim 16, characterized in that the end (75) of the recesses (72, 73) ending in the recess (74) corresponding to the key member (51) has a crimping capable of impeding the locking members (70, 71) from being fully pulled out of their respective recess (72, 73) in the absence of the key member (51).

19. Bolt lock substantially as described herein, 0 h with reference to and as shown in Figures 1 to 4 or Figures 1 to 3 when modified by Figure 5 of the accompanying drawings