MXPA00005875A - Improved cylinder lock system - Google Patents

Abstract

A key having profile features which include a shaped indentation (74) on a first side of the blade (64) and an aligned projection (72) on the opposite side of the blade cooperates with a cylinder lock with unauthorized key trapping capability. The lock has an auxiliary locking pin (50) which cooperates with the key indentation and a movable plate member (34) which cooperates with the key projection. Both the indentation and projection must be present and properly sized and shaped for a properly bitted key to operate the lock.

Description

IMPROVED CYLINDER LOCK SYSTEM BACKGROUND OF THE INVENTION FIELD OF THE INVENTION The present invention relates to the improvement of the security of padlocks and mechanical locks and, in particular, to minimizing the possibility of having blind keys available made from unauthorized keys to open those locks or locks. More specifically, this invention relates to an improved cylinder lock and a novel key which, together with the lock, define a system that provides extremely secure access control. Accordingly, the general objective of the present invention is to provide methods and apparatuses of this nature with novel and improved features.

RELATED PREVIOUS TECHNIQUE Mechanical locks using one or more pin tumbler dies are well known in the art. In the above locks, the pin tumblers are grouped in "steps" that can be displaced radially with respect to the axis of rotation of a cylinder or center, and this displacement occurs in response to the insertion of a key into a defined keyhole. In the center. The steps of the pin tumblers include at least one upper pin or driving pin and a lower pin or driven pin, abutting and aligned axially; these pins are arranged in housings thereof, located both in the center and in the frame surrounding the lock. The steps of pin tumblers are elastically actuated in the direction of the axis of rotation of the center and, when there is no key in the keyhole, a pin of each stagger passes through or fills the gap between the center and the frame, thus preventing there is a relative rotation between them. As a result of communication between the keyhole and the pin housings in the center housing the lower or driven pins, the insertion of a key duly machined into the keyhole will result in a displacement of the pin tumbler stages, which commonly it places the mutual coupling between the driving pins and the driven pins in a line of discontinuity defined by the external circumference of the center. In this way, a properly machined key will allow the center to rotate together with the pins driven inside the frame, while the drive pins remain fixed or static. The rotation of the center will, by means of the action of a cam or rear linkage mechanically coupled thereto, activate a closing or locking mechanism, or a latch. Locks of the type described above are known in the art as "cylinder locks". The easiest way to defeat or cancel a cylinder lock is to "manufacture" an unauthorized key. It is not possible to guarantee that a cylinder lock will not be expired even if this lock has a complex keyhole, that is, with a very intricate configuration, and / or through the use of various arrangements of pit tumbler stages. This impossibility is due in part to the fact that various manufacturers provide blind keys that have leaves with a configuration that already comes from the factory or that obtains its final shape using conventional key milling machines, and that once configured, are used in locks sold to Bulk Thus, for some time, it has been sought to create a lock system that allows to increase security while minimizing the possibility of manufacturing spare parts of blind keys without authorization and, in particular, a lock system that allows the manufacturer to have a control of the keys since this is the only source of the keys that are used in that system. Also, a high level of security means that the lock "imprisons" the unauthorized keys and, especially, the partially formed keys that have been made according to a model to try to overcome or cancel the lock.

BRIEF DESCRIPTION OF THE INVENTION The present invention overcomes the deficiencies mentioned above, as well as other deficiencies and disadvantages of the prior art and, thus, provides a novel lock system characterized by a key that, in part, has a unique configuration. A lock system in accordance with the present invention also includes a novel and improved cylinder lock with elements that cooperate with the unique configuration of the aforementioned key to allow rotation of the center and under certain circumstances, to capture or lock mechanically the unauthorized keys that enter the keyhole. A lock system according to the invention includes a cylinder lock with a center which, in the longitudinal position of at least one step of pin tumblers, has a notch generally in the form of a circular segment. With the lock in a closed or locked state, that is, before the center rotates relative to the frame, this notch will not be aligned with the staggering of pin tumblers. The notch is communicated with the keyhole through an opening located on a first side thereof. A plate or segment is located in the notch, and this plate has the appropriate size and shape to be able to have limited movement within the notch relative to the center, and this movement is guided by the internal diameter of the frame. The movement of the plate by a protruding cam with the suitable shape and location can be produced on a first side of an authorized key, and extending through the opening in the first side of the keyhole. This protruding cam extends outwardly beyond the lateral plane of the blind key from which the key was formed and into the notch in the form of a circular segment. When the plate is rotated along a path defined by the internal diameter of the frame in response to contact with a protruding cam of an authorized key, this plate will function as an extension of the center and present an edge that generally corresponds to the line of discontinuity. In this way, with an authorized key in the keyhole, the center will appear to be uninterrupted for the pin of a step of pin tumblers at the location of the notch, and the center can thus rotate beyond the alignment point. of the drive pin and the plate without the drive pin moving radially. However, in the case of an unauthorized key, that is, a key that does not have an outgoing cam, the rotation of the center will cause the outer periphery of the plate to move below the discontinuity line and, in part, , will define an opening inward from which the drive pin will move once the center has rotated relative to the frame enough to align completely with the pin tumbler housing in the frame with the notch in the center . Consequently, the driving pin will move radially towards the axis of rotation of the center to cross the line of discontinuity and prevent the center from continuing to rotate either in the direction or in the opposite direction of the clockwise. In this way, the lock will be inoperable and the unauthorized key will be trapped in the keyhole. A lock system according to the invention also includes a duly shaped indentation and located on the opposite side of the key blade with respect to the outgoing cam. This indentation is aligned with, and formed simultaneously with, the outgoing cam located on the opposite side of the blade. The indentation is aligned with a housing in the center that houses an auxiliary locking pin. Advantageously, this housing is oriented so that its axis is in a transverse position with respect to a plane defined by the side of a blind key from which the key was formed. The auxiliary closing pin is elastically driven outwards, and in this way a first end thereof is housed in a corresponding cavity in the inner diameter of the frame, that is, the auxiliary closure pin crosses the discontinuity line with the lock in the closed state. The end placed outwardly of the auxiliary locking pin and the side wall of the cooperating cavity in the frame are shaped so that, by rotating the center relative to the frame, if the auxiliary locking pin can move on its actuating spring, remove the auxiliary locking pin from the cavity in the frame by means of the cam, and the outer end of the locking pin will slide over the internal diameter of the frame while the center continues to rotate. However, this arrangement of the cam will only take place when a key blade with an indentation of the appropriate size, shape and location for housing the second end of the auxiliary locking pin penetrates the keyhole. In this way, an authorized key for the lock system according to this invention should have both an outgoing cam with unique shape and location on a first side of the key blade, and an indentation on the opposite side of the door leaf. key with the proper location and shape to house the locking pin.

BRIEF DESCRIPTION OF THE DRAWINGS Those skilled in the art will be able to have a better understanding of the present invention and its objectives and advantages with reference to the accompanying drawings, in which like numerals refer to like elements in the various figures, and in which: the figure 1 is a partial side elevational view, partially fragmented to illustrate a cylinder lock in detail in accordance with a preferred embodiment of the present invention; Figures 2 and 3 are perspective views taken from opposite sides of a key of a lock system according to the invention; Figures 4A and 4B are side elevational views of a cross section of a lock system in accordance with the present invention in different stages of operation, and these Figures 4A and 4B are views taken transversely with respect to Figure 1 and illustrate the lock of figure 1 together with the key of figures 2 and 3; Figures 5A to 5C are partial views of the key blade of Figures 2 and 3; Figure 6 is a view similar to that of Figure 4, illustrating an attempt to overcome a lock in accordance with the present invention using a key with only one of the characteristics of the blade of the key of the invention; and Figures 7A and 7B are views similar to Figure 6, illustrating the result of attempting to overcome a lock in accordance with the present invention by the use of a key having only the rest of the characteristics of the key blade. the invention.

DESCRIPTION OF THE PREFERRED MODALITY Referring to the drawings, a cylinder lock according to the present invention is generally illustrated with the number 10. Commonly, the lock 10 includes a center 12 that can be rotated about an axis of rotation, relative to the frame 14. In the described embodiment, the frame 14 includes an extension or magnification 16. In this magnification 16 there is a single linear grouping of basins or housings of the pins, such as the housing 18. The housings of the pins 18, with the lock in closed state, are axially aligned with the housings of the pins 20 in the center 12. The steps of the pin tumblers which in the described embodiment include a pull pin or upper 22 and a driven or lower pin 24, are located in the housings of the aligned pins. The steps of the pin tumblers are elastically driven radially in the direction of the axis of rotation of the center 12. In the described embodiment, the drive is achieved by means of compression springs, similar to the spring illustrated schematically with the number 26, which are in contact with the ends arranged outwardly of the driving pins. A rear crossbar or cam, not shown, will be connected to the end of the center 12 on the side opposite the end defining the eye of the keyhole. The rear crossbar will be coupled to a latch mechanism or the like that will allow the lock to be selectively used to prevent and to allow access to a space on one side of a door on which this lock is installed. The lock described above is of conventional configuration. Those skilled in the art will appreciate that the configuration and location of the housings of the pegs and the steps of the peg tumblers can change, without thereby departing from the scope of the invention. For example, there may be multiple arrangements of the pin housings, offset from each other angularly, and the pitch of the pin tumblers may include any given number of pins. Also and in accordance with the conventional configuration, as can be seen in figures 4, 6 and 7, the center 12 has a keyhole 28. The keyhole is communicated with the ends disposed inwardly of the housings of the pins 20 in the center and has a configuration, this is, a transversal area, determined by the manufacturer of the lock. A conventional keyhole includes a variety of guards that, in part, define the cross-sectional area of the keyhole. A correct key, that is, a key that can be inserted into the keyhole, should have a blade with carved or machined side surfaces that are complementary to those guards. Thus, from a blind key with parallel sides, longitudinal cuts can be made so that the cross-sectional area of the key blade corresponds to the cross-sectional area of the keyhole. In addition, for the lock to work, the key blade must be "machined", that is, it must have bits whose irregular surface must correspond to the combination of the lock, determined by the location of the steps of the pin tumblers and by the relative lengths of the individual pins that make up these steps. In the less complicated arrangement, as illustrated in the drawings, the key will be machined by cutting the material from the upper edge of the sheet to produce a common serrated edge. The "combination" of a cylinder lock of a prior art is defined in this way by the configuration and milling of the key blade. The insertion of a key duly machined in the keyhole will establish contact between the irregular upper edge of the key blade and the driven pins and, as shown in figures 4, 6 and 7, this will cause the steps of the Pin tumblers are displaced by being spring driven 26 to place the mutual coupling between the driving pins and the driven pins of each step of the pin tumblers in the line of discontinuity between the center 12 and the frame 14. When all the stages of the pin tumblers have been relocated from their position in the closed state, that is, the state in which a pin of each stagger passes the line of discontinuity and thus is partially located in a housing of both the center and the frame , it is possible to rotate the center in relation to the frame. In summary, in a conventional cylinder lock, so that there can be a relative rotation between the center and the frame the blind key must have longitudinal cuts on its sides to define a configuration that corresponds to the cross-sectional area of the keyhole and must be machined so that it has an irregular surface that corresponds to the combination of the lock defined by the steps of the pin tumblers. According to the present invention, in the place of at least one of the steps of the pin tumblers, a circular segment of the center 12 is cut. This segment is defined by the wall 30 which, with the exceptions that will be described later , is straight and continuous between two points of intersection with the line of discontinuity. In the described embodiment, the space between the keyhole 28 and the wall 30 increases from a first end of the wall, located adjacent to the bottom of the keyhole, towards an opposite end of the wall 30 adjacent to the outer end of the wall. a pin housing 20. In this way, the wall 30 defines a ramp. An opening 32 in the wall 30 communicates the keyhole and the space formed by the notch in a circular segment. In the described embodiment, the opening 32 is located at the base of a slit defining a portion of the keyhole configuration. Although it is possible to use other arrangements, in this embodiment, the opening 32 is defined by a slot with a maximum depth that exceeds the thickness of the wall that separates the notch in the circular segment of the keyhole. A movable plate 34, with a shape similar to but not exactly equal to the notch in circular segment defined by the wall 30, is inserted in this notch. The plate 34 has a first straight side 36 facing the wall 30. In the described embodiment, the side 36 has a projection 38 that penets the opening 32. The plate 34 also has a first curved side 40 that extends from a first end of the side 36, and the radius of the side 40 is substantially equivalent to the radius of the center 12. The curved side 40 ends in, that is, encounters a second side surface 42 that can also be curved, as illustd, or straight. This lateral surface 42 extends towards the second end of the straight side 36, that is, the end of the side 36 disposed on the plane of the upper part of the keyhole. The width of the plate 34 is, as can be seen in figure 1, smaller than the diameter of the pin housing 18 in the increase 16. The center 12 has a hole without exit or blind hole 44 which, in part, extends towards the inside of the notch in segment which, in part, is defined by the wall 30. The hole 44 has a size and shape complementary to the lower end of the driving pin 22. The axis of the hole 44 crosses or cuts transversely the notch in circular segment. Accordingly, the plate 34 extends towards, and may cross or fill, the dead hole 44. Depending on the position of the plate 34, the pin 22 may penet the hole 43 or be blocked. The position of the plate 34 is controlled in the manner that will be described later. A cylinder lock according to the invention also includes at least a first auxiliary locking plug 50. The plug 50 has an axis and is arranged, for a reciprocal movement, in a plug housing 52 which is in the center 12. housing 52 communicates, at a first end, with the keyhole 28 and, at its opposite end, with the circumference of the center 12. The housing 52 contains an axis that is oriented in the manner described transversely to a plane AA , defined by the axes of the steps of pin tumblers, so that this plane AA is also defined by the keyhole. The housing 52 has two portions of different internal diameter and thus defines a shoulder or projection against which the first end of the actuating spring 54 rests. The opposite end of the actuator 54 is in contact with a shoulder of the pin 50, defined by the splice of two portions of different diameter of the auxiliary closing pin, and in this way pushes the plug 50 in the direction of the frame 14. The frame 14 has a cavity 56 which houses the end of the auxiliary locking plug 50 arranged outward with respect to the keyhole. With the cylinder lock in the closed state, the end disposed outwardly of the auxiliary closure plug 50 will be located in the cavity 56 as illustd for example in Figure 6, that is, the auxiliary closure plug 50 will cross the line of discontinuity. Accordingly, the auxiliary closure plug 50 will coope with the steps of the pin tumblers to prevent the center 12 from rotating when there is no key in the keyhole 28 authorized and properly machined. The opposite end disposed inwardly of the auxiliary locking plug 50 will normally be found, that is, when the lock is in the closed state, flush with the side of the keyhole 28. In the described embodiment of a lock according to the invention , the end disposed outwardly of the auxiliary closure plug 50 and a portion of the wall defining the cavity 56, that is, the portion of the wall 58 extending from the maximum depth of the cavity in the direction in which it rotates the center, up to the internal diameter of the frame 14, will coope in turn in the form of a cam roller and a cam surface. In this way, when the rotation of the center 12 relative to the frame 14 is made possible in the manner described below, the rotational force applied on the center 12 will cause the outer end of the cam roller of the auxiliary locking plug 50. pass over the engaging cam surface 58 of the cavity 56, and the arrangement of the resulting cam will drive the auxiliary pin 50 axially inward in the direction of the keyhole. This inward axial movement can only occur if there is a space of adequate size, shape and location to accommodate the inner end of the plug 50.

In figures 2 and 3, a blind key according to the invention is illustrated with the number 60. The blind key 60 includes a portion of the eye 62 and a portion of the sheet 64, and part of the key portion of the key is illustrated on an enlarged scale in Figure 5. As is common, the blind key 60 has a pair of opposed flattened sides 66 and 68, an upper edge 70 and an opposite lower edge. In this embodiment, characterized in that a step arrangement of pin tumblers defines the conventional portion of the combination for the lock to work, the upper edge 70 of the blade of the key 64 will be irregularly milled to define the bits of the key. . As the blind key 60 is illustrated, the configuration of the key corresponding to the cross-sectional area of the keyhole has been machined on its sides 66 and 68 also in a conventional manner, that is, material has been cut from the flat side surfaces of the key Blind Commonly, this milling is done by the manufacturer of the lock, or in the case of suppliers of "spare" keys by the manufacturer of the blind keys or matrices. It is also common for locksmiths to have machinery to mill the flat sides of the blind keys to give them the necessary configuration. The blind key 60 is different from those of previous techniques, since it has a projecting cam 72 on a first side thereof. Likewise, on the second opposite side, a blind key according to the present invention has an indentation 74. The preferred production method of the projecting cam and the indentation is a punching operation carried out from the sheet side of the sheet. Fig. 4A and 4B illustrate the operation of a lock according to the present invention with a correct key, that is, an authorized key configured from the blind key 60 of Figs. 2 and 3 The insertion of this correct key in the keyhole 28 will cause a contact to be established between the projecting cam 72 of the key blade and the projection 38 of the plate 34. With reference to Figure 5B, it can be seen that the edge of the projection 72 is inclined upwards to the top of the projection. The contact between the projections 72 and 38 will impart a clockwise movement relative to the center 12 of the plate 34. This movement will be guided by the internal diameter of the frame 14 and thus the plate 34 will be pushed towards up so that the junction of the side 36 and the surface 42 will be in abutment with the upper end of the wall 30. This splice causes the side surface 42 of the plate to open or fill the hole 44. Accordingly, it is possible to rotate the center 12 within the frame 14, and at the time this occurs, the side 42 of the plate 34 will at first prevent the driving pin 22 from penetrating the dead hole 44, as illustrated in Figure 4B. As the center continues to rotate, the curved side 40 of the plate 34 will come into contact with the lower part of the driving pin 44 and will cause the driving pin to rest against the driving spring 26 so that the center can continue to rotate until reaching a position where the lock is open.

Simultaneously with the operation described above, the cooperation between the cam surface 58 and the cam roller end of the auxiliary closure plug 50 will, as illustrated in FIG. 4B, cause the auxiliary closure pin to be pushed towards inside, thanks to the presence of the indentation 74 of the blade of the key in alignment with the housing of the plug 52. During the rotational movement of the center until reaching the open position of the lock, the end of the cam roller of the auxiliary locking plug 50 will slide over the internal diameter of the frame 14. With reference to Figure 6, an attempt to operate the lock of the present invention with a key duly machined with a projecting cam 72 but without indentation will not be successful. 74, since, as can be seen in the drawing, it is not possible to release the auxiliary closure plug 50 from the cavity 56. With reference to FIGS. 7A and 7B, the insertion in the keyhole 28 of a key that has the combination of the lock but not having the projecting cam 72 will make it possible to rotate the center 12 within the frame 14. As the center rotates clockwise, it carries the plate 34 with it. As it advances, it rotates a relatively short distance , as illustrated in Figure 7B, the plate "will fall" so that the side 36 of the same splice with the wall 30, and this "fall" will be the result of either the interaction between the driving pin 22 driven by spring and plate 34, or by the influence of gravity, or by both factors. When the center continues to rotate until reaching the point where the dead hole 44 is aligned with the housing of the pin 18, the driving pin 22 under the influence of the spring 26, will be pushed into the dead hole 44 until touching bottom at the top, that is, side 42, of plate 34. At this time, the center will not be able to continue rotating either clockwise or counterclockwise, since the traction pin 22 will have crossed the line of discontinuity. In addition, due to the interaction between the lower or driven pins immobilized and the upper edge of the key, the wrong key will be imprisoned in the keyhole, that is, it can not be removed. If it is desired that the above-described imprisonment occurs both clockwise and counterclockwise of the center 12, a second additional plate and a second projection on the leaf side of the leaf will be required. key opposite the projection 72. A lock according to the invention can include a variety of plates 34 and auxiliary locking housings 50 arranged on the opposite side of these plates. It is possible to reverse the location of the plates and the auxiliary locking pins with respect to the illustrated location, and these two options may be present in the same lock. In this way, as can be seen in figure 6, the frame 14 can conveniently have a pair of longitudinal grooves arranged opposite one another and defining the cavities 56 and 56 '. As can be seen in Figure 5B, where the lock has various plates 34 on the same side of the keyhole, projections 72 with inclined surfaces will be formed on the leading surfaces of the leading and trailing edges. Also, as necessary (not shown), indentations 74 will have ramps on both ends. Although a preferred embodiment has been described and illustrated, it is possible to make various modifications and substitutions thereto without departing from the scope and intention of the invention. Accordingly, it should be understood that the invention is described herein by way of illustration but not limitation.

Claims (18)

NOVEDA OF THE INVENTION CLAIMS

1. - A cylinder lock that includes a frame, and this frame has a variety of housings for the pin tumblers, and the aforementioned frame also has an interior surface defining a center housing, having an axis, and housings for the aforementioned pin tumblers extend to that inner surface, and the frame described above has been assembled keeping in mind the environment in which this lock will be used; a center that can rotate and cooperates with the aforesaid frame to form a displaceable component of the lock described above, and the center has an outer surface disposed in the housing of the aforesaid frame center to rotate about the axis of that housing, and the center defines a keyhole that extends longitudinally and with opposite sides, and that center has a variety of housings for the pin tumblers, and these housings for the pin tumblers can be aligned with the housings for the pin tumblers of the frame, and the housings for the pin tumblers in the center extend between the aforementioned keyhole and the outer surface of the center, whereby it is possible to establish a communication between the frame and the housings for the pin tumblers in the center, and a discontinuity line for that lock is defined by mutual coupling or between the interior surface of that framework and the exterior surface of that center; pin tumblers arranged reciprocally in the housings for the above-mentioned pin tumblers, and these pin tumblers each have at least one lower pin and a driving pin, and these pins are aligned axially and spliced one against the other. another, and at least one of these pins of each pin tumbler extends beyond the discontinuity line so that it is partially arranged in a housing for the pin tumblers of the frame and in a housing for the pin tumblers of the center aligned, in the absence of a key duly machined within the aforementioned keyhole, and each of these pin tumblers also includes a first spring for elastically driving these pins aligned in the direction of the center described above; at least a first auxiliary closure means for establishing a mechanical coupling preventing rotation between the aforementioned frame and center in the absence of a key within the keyhole with a first configuration cooperating with this first auxiliary closure means, and this first auxiliary closure means is displaced in part by, and moves relative to, the aforementioned center, and this first auxiliary closure means communicates with a first side of the aforementioned keyhole; and trapping means for mechanically capturing inside the keyhole the keys that do not have a second characteristic configuration, and these trapping means are displaced by, and move in relation to, the aforementioned center, and these means of trapping extend between the line of discontinuity and a second side of the keyhole described above, and the second side of this keyhole is on the opposite side of the first side thereof, and these trapping means have a driver portion that is at less partially aligned with the auxiliary closing means, and this actuating portion cooperates with a second characteristic configuration of the key, and the rotation of the center relative to the frame is possible thanks to the movement induced by the first characteristic configuration of the key on the first auxiliary closure means to uncouple this center from the frame described above, and rotate it tion of this center until it reaches an open orientation is possible thanks to the movement induced by the second characteristic configuration of the key on the means of entrapment, by placing them in a position of no imprisonment.

2. The cylinder lock according to m 1, further characterized in that the first auxiliary closure means includes: a housing for the locking pin in the center, and this housing for the locking pin extends between the first side of the keyhole and the outer surface of the center, and the housing for the locking pin has an axis; a cavity in the interior surface of the frame, and this cavity is aligned with the axis of the housing for the closure pin when the cylinder lock is in the closed state, and this cavity is defined at least in part by a wall configured to define a cam surface, and this cam surface abuts the inner surface of the frame; a locking pin disposed in the housing for the locking pin of the center for a reciprocal movement, and this locking pin has a first end shaped to cooperate with the cavity of the frame to establish a coupling which prevents rotation, and this first end of the closing pin defines at least in part a cam roller which cooperates with the cam surface defined by the cavity of the frame, and by means of which rotation of the center relative to the frame will impose a force in the direction of the keyhole on the closing pin, and this closing pin has a second end disposed on the opposite side with respect to the first end thereof, and this second end of the closing pin has a predetermined shape for cooperating with an indentation configured in the key blade, and this indentation configured on the key blade defines the first characteristic configuration of the key using the key the rotation of the center relative to the frame when this key is in the keyhole, will result in the displacement of the second end of the locking pin towards the indentation configured in the key blade and the retraction of the first end of the locking pin of the aforementioned frame cavity; and a second spring for resiliently actuating the closure housing in order to move the first end of the locking pin of the keyhole and move it towards the interior surface of the frame, whereby the locking pin will extend beyond the line of discontinuity and will penetrate the cavity of the frame.

3. The cylinder lock according to claim 1, further characterized in that the clamping means include: a notch generally configured in segment in the center, and this notch extends along a curved portion of the outer surface of the center, and this notch has a longitudinal position and is offset from one of the housings for the pin tumblers in the center, and this notch intercepts a lateral extension of the second side of the keyhole; and a plate that loosely fits in this notch, and this plate can move relative to the center between a first non-trapping position characterized in that this plate causes the line of discontinuity to be substantially uninterrupted during the rotation of the center relative to the frame , and a second clamping position characterized in that at least a portion of the plate is displaced from the circumference of the center, whereby a driving pin located in the pin tumbler housing of the frame cooperating with the pin tumbler housing. from the center can cross the line of discontinuity, and this actuating portion of the trapping means includes a part of the plate that is aligned with the lateral extension of the keyhole.

4. The cylinder lock according to claim 3, further characterized in that the first auxiliary closure means includes: a housing for the locking pin in the center, and this housing for the locking pin extends between a first side of the keyhole and the outer surface of the center, and this housing for the locking pin has an axis aligned with the lateral extension of the keyhole; a cavity in the interior surface of the frame, and this cavity is aligned with the axis of the housing for the closure pin when the cylinder lock is in the closed state, and this cavity is defined at least in part by a wall configured to define a cam surface, and this cam surface splices with the inner surface of the frame; a locking pin disposed in the housing for the locking pin of the center for a reciprocal movement, and this locking pin has a first end shaped to cooperate with the cavity of the frame to establish a coupling which prevents rotation, and this first end of the closing pin defines at least in part a cam roller which cooperates with the cam surface defined by the cavity of the frame, and by means of which rotation of the center relative to the frame will impose a force in the direction of the keyhole on the closing pin, and this closing pin has a second end disposed on the opposite side with respect to the first end thereof, and this second end of the closing pin has a predetermined shape for cooperating with an indentation configured in the key blade, and this indentation configured on the key blade defines the first characteristic configuration of the key using the key the rotation of the center relative to the frame when this key is in the keyhole, will result in the displacement of the second end of the locking pin towards the configuration configured in the key blade and the retraction of the first end of the key. closure of the aforesaid frame cavity; and a second spring for resiliently actuating the closure housing in order to move the first end of the locking pin of the keyhole and move it towards the interior surface of the frame, whereby the locking pin will extend beyond the line of discontinuity and will penetrate the cavity of the frame.

5. The cylinder lock according to claim 1, further characterized in that the keyhole defined by the aforementioned center defines a plane, and characterized in that the first auxiliary closure means operates along a generally transverse axis oriented with respect to that plane, characterized in that the driving portion of the clamping means is located on that transverse axis.

6.- The cylinder lock in accordance with the claim 5, further characterized in that the first auxiliary closure means includes an elongated locking pin with an axis and a first end extending inwardly of the keyhole in the open state of this cylinder lock, and characterized in that the operating portion of the The locking means includes a projection that cooperates with a projecting cam on the blade of the key, and wherein the first end of the locking pin has a shape that allows it to be received in the indentation of the key blade which generally has a complementary form with respect to the outgoing cam of that key blade.

7. The cylinder lock according to claim 5, further characterized in that the clamping means includes: a generally segment-shaped notch in the center, and this notch extends along a curved portion of the outer surface from the center, and this notch is located in a longitudinal and off-center position of one of the housings for the pin tumblers in the center, and this notch intersects a lateral extension of the second side of the keyhole, and this lateral extension of the keyhole lies at least partly on that transverse axis; and a plate that loosely fits within that notch, and that plate can be displaced relative to the center between a first non-trapping position characterized in that the plate causes the line of discontinuity to remain substantially uninterrupted during rotation of the center with relation to the frame, and a second position of imprisonment characterized in that at least a portion of. that plate is displaced from the circumference of the center, whereby a drag pin located in the housing for the pin tumbler of the frame cooperating with the first pin tumbler housing of the center may cross that line of discontinuity and the portion of actuation of the trapping means includes a part of that plate that is aligned with the lateral extension of the keyhole.

8. - The cylinder lock according to claim 5, further characterized in that the first auxiliary closure means includes: a housing for the closing pin in the center, and this housing for the closing pin extends between a first side of the keyhole and the outer surface of the center, and this housing for the closing pin defines the transverse axis described above; a cavity in the interior surface of the frame, and this cavity is aligned with the axis of the housing for the closure pin when the cylinder lock is in the closed state, and this cavity is defined at least in part by a wall configured to define a cam surface, and this cam surface abuts the inner surface of the frame; a locking pin disposed in the housing for the locking pin of the center for a reciprocal movement, and this locking pin has a first end shaped to cooperate with the cavity of the frame to establish a coupling which prevents rotation, and this first end of the closing pin defines at least in part a cam roller which cooperates with the cam surface defined by the cavity of the frame, and by means of which rotation of the center relative to the frame will impose a force in the direction of the keyhole on the closing pin, and this locking pin has a second end disposed on the opposite side with respect to the first end thereof, and this second end of the closing pin has a predetermined shape for cooperating with an indentation configured in the sheet of the key, and this indentation configured on the key blade defines the first characteristic configuration of the key by means of the which the rotation of the center relative to the frame when this key is in the keyhole, will result in the displacement of the second end of the closing pin towards the indentation configured in the key blade and the retraction of the first end of the locking pin of the aforementioned frame cavity; and a second spring for resiliently actuating the closure housing in order to move the first end of the locking pin of the keyhole and move it towards the interior surface of the frame, whereby the locking pin will extend beyond the line of discontinuity and will penetrate into the cavity of the frame.

9.- the cylinder lock in accordance with the claim 1, further characterized in that the first auxiliary closure means includes: a housing for the locking pin in the center, and this housing for the locking pin extends between a first side of the keyhole and the outer surface of the center; a cavity in the interior surface of the frame, and this cavity is aligned with the axis of the housing for the closure pin when the cylinder lock is in the closed state, and this cavity is defined at least in part by a wall configured to define a cam surface, and this cam surface abuts the inner surface of the frame; a locking pin disposed in the housing for the locking pin of the center for a reciprocal movement, and this locking pin has a first end shaped to cooperate with the cavity of the frame to establish a coupling which prevents rotation, and this first end of the closing pin defines at least in part a cam roller which cooperates with the cam surface defined by the cavity of the frame, and by means of which rotation of the center relative to the frame will impose a force in the direction of the keyhole on the closing pin, and this locking pin has a second end disposed on the opposite side with respect to the first end thereof, and this second end of the closing pin has a predetermined shape for cooperating with an indentation configured in the sheet of the key, and this indentation configured on the key blade defines the first characteristic configuration of the key by means of the which the rotation of the center relative to the frame when this key is in the keyhole, will result in the displacement of the second end of the closing pin towards the indentation configured in the key blade and the retraction of the first end of the locking pin of the aforementioned frame cavity; and a second spring for resiliently actuating the closure housing in order to move the first end of the locking pin of the keyhole and move it towards the interior surface of the frame, whereby the locking pin will extend beyond the line of discontinuity and will penetrate the cavity of the frame.

10. A cylinder lock system that includes: a frame with a variety of housings for the pin tumblers, and this frame also has an interior surface defining a housing for the center, and the housings for the pin tumblers are extend to that inner surface, and that frame has been mounted based on a fixed orientation subject to the environment of use of the lock; a center that cooperates with this frame to form a component of the lock of this system whose elements move relative to each other, and this center is located within the housing for the center of the frame and rotates around an axis, and this center it defines a keyhole extending longitudinally and having sides disposed opposite one another, and this center further defines a variety of housings for receiving pin tumblers, and these housings for center pin tumblers can be aligned with housings for pin tumblers of the frame, and the pin tumbler housings in the center extend between the keyhole and the outer surface of the center and can establish a communication between the housings for pin tumblers of the frame and the center, and a line of discontinuity for the lock of this system by mutual coupling between the inner surface of The frame and the outer surface of the center; the plug tumblers located reciprocally in the aforementioned pin tumbler housings, and these pin tumblers each have at least one driven pin and a drive pin which are axially aligned and spliced, and at least one of these pins of each pin tumbler extends through the discontinuity line so that it is located in a housing for pin tumblers of the frame aligned with a pin tumbler housing of the center, in the absence of a key duly machined in the keyhole, and these pin tumblers further include a first spring for elastically driving the pins aligned in the direction of the center; at least a first auxiliary closure means for establishing a rotary movement preventing the mechanical coupling between the frame and the center in the absence of a key in the keyhole having a first characteristic configuration cooperating with the aforementioned first auxiliary closure means, and this first auxiliary closure means can be moved relative to the center, and communicates with a first side of the keyhole: a trapping means for mechanically locking within the keyhole any key that does not have the second characteristic configuration, and this means of trapping can be dragged and moved relative to the center, and this means of trapping extends between the line of discontinuity and a second side of the keyhole which is located on the opposite side of the first side of the keyhole, and this entrapment means has a drive portion that is aligned at least in part with the first means of auxiliary closure mentioned above, and this actuating portion of the traction means cooperates with a second characteristic configuration, and rotation of the center relative to the frame is made possible by the movement of the auxiliary closure means to decouple the center of the frame and rotate the center to an open orientation, thanks to the movement induced by the second characteristic configuration of the key of the trapping means to a non-trapping position; and a key, and this key includes: an eye; a key blade that extends longitudinally from that eye and ends at the tip of the blade, and this blade of the key has a first and a second side faces and a pair of edges opposite each other that interconnect these faces laterals, and the first and second lateral faces are at least in part substantially parallel to each other; at least a first three-dimensional projection extending outward from one of the side faces of the sheet of the Ship, and this projection defines a second characteristic configuration, and the outgoing side which is located in the direction of the tip of the sheet of the key defines a ramp that extends to a maximum height of this projection and by means of which this projection can function as a cam in response to a longitudinal movement of the aforementioned key blade; and an indentation on the second side face of the key blade, and this indentation is aligned with the aforementioned projection, and this indentation defines a first characteristic configuration. 1.

The cylinder lock system according to claim 10, further characterized in that the keyhole defines a plane and wherein the auxiliary closure means can operate along an axis oriented transverse with respect to that plane. , and wherein the driving portion of the trapping means is located on this transverse axis.

12. The cylinder lock system according to claim 11, further characterized in that the trapping means includes: a notch segment-shaped in the center, and this notch extends along a curved portion of the surface outside of the center, and this notch is located in longitudinal and off-center position of one of the center pin tumbler housings, and this indentation intercepts a lateral extension of the second side of the keyhole; and a plate loosely fitted in that notch, and this plate can move relative to the center between a first non-clamped position in which the plate causes the line of discontinuity to remain substantially uninterrupted during rotation of the center relative to the frame , and a second clamping position of the key wherein at least a portion of this plate is displaced from the circumference of the center, wherein a pull pin located in the pin tumbler housing of the frame cooperating with the tumbler housing of pins from the center can cross the line of discontinuity, and this actuating portion of the trapping means includes an extension of this plate cooperating with the projection of the key blade.

13. The cylinder lock system according to claim 12, further characterized in that the auxiliary closure means includes: a housing for the locking pin in the center, and this housing for the locking pin extends between a first side of the keyhole and the outer surface of the center; a cavity in the interior surface of the frame, and this cavity is aligned with the axis of the housing for the closing pin when the cylinder lock is in the closed state, and this cavity is defined at least in part by a wall configured to define a cam surface, and this cam surface abuts the inner surface of the frame; a locking pin disposed in the housing for the locking pin of the center for reciprocating movement, and this locking pin has a first end shaped to cooperate with the cavity of the frame to establish a coupling preventing rotation, and this first end of the locking pin defines at least in part a cam roller which cooperates with the cam surface defined by the cavity of the frame, wherein the rotation of the center relative to the frame will impose a force in the direction of the keyhole on that locking pin , and that locking pin has a second end disposed on the opposite side of the first end of that locking pin, and that second end of the locking pin has a predetermined shape to cooperate with the indentation of the key blade, in where the rotation of the center in relation to the frame by means of that key inserted in the keyhole will result in a movement of the second end of the pin closing towards the indentation of the blade of the key and a retraction of the first end of the closing pin of the cavity of the frame; and a second spring for applying an elastic drive to the locking pin to move the first end of the locking pin of the keyhole and direct it towards the inner surface of the frame, where the auxiliary locking pin will normally extend through the line of discontinuity and into the cavity of the frame.

14. The cylinder lock system according to claim 13, further characterized in that the indentation of the blade of the key is generally complementary to the shape of the projection of the blade of the key.

15. A blind key to be used in the manufacture of a key for a cylinder lock with a rotating center, and the center of the lock defines a keyhole with a transverse configuration when viewed in a direction transverse to the axis of the lock. rotation of the center, and the center of the lock also has a notch that communicates with the keyhole, and the lock further has a movable plate that is mounted within the notch, and this plate has a roll protrusion of cam extending its ends toward the middle part of the keyhole, and the cylinder lock also includes a frame within which the center rotates, and the frame has an internal diameter and the bottom of the keyhole extends to the frame, where a first edge of the blade of the key can come into contact with the internal diameter of the frame during the rotation of the center of the lock, and the cylinder lock it also includes an auxiliary closure pin and with a first end that is in contact with the internal diameter of the frame, and this auxiliary closing pin is located in a hole extending from the center to the keyhole, and this auxiliary closing pin it has a second end, and is normally elastically actuated to remove the second end of the keyhole, and the blind key is formed of a flat metal matrix with first and second substantially parallel surfaces respectively defining the first and second plates, and This blind key includes: an eye; a blade of the key extending longitudinally from that eye, and the blade of the key has first and second side faces and a pair of opposite and spaced edges interconnecting the aforementioned side faces, and the distance between these opposite edges is much greater than the distance between the side faces, and the first and second side faces have certain irregularities extending longitudinally and defining a cross section of the key blade that is generally complementary in size and shape with the configuration of the keyhole, and the first and second side faces get their shape by milling or cutting the opposite parallel surfaces of the flat metal matrix; at least one three-dimensional projecting cam extending outwardly from a first side face beyond the first of the aforementioned planes, and the surface of this projecting cam that faces the tip of the key blade has a shape and size such that it allows it to interact with a cam roller of a plate extending towards the inside of the keyhole of the lock, where the longitudinal movement of the key blade inside the lock will cause a contact to be established between the projecting cam and the cam roller, and will impart a movement to the plate by actuating the projecting cam and away from the keyhole of the lock; and a three-dimensional cavity in the second side face of the key blade, and this cavity generally extends towards the first side face of the key blade and is at least partially aligned with the protruding cam, and this cavity has the suitable size and shape for housing the second end of the auxiliary closure pin.

16. The blind key according to claim 15, further characterized in that the cavity is complementary in its shape with the aforementioned outgoing cam.

17. The blind key according to claim 15, further characterized in that the projection and the cavity define axes and are coaxial.

18. The blind key according to claim 16, further characterized in that the projection and the cavity define axes and are coaxial.