MXPA00001523A - Disc tumbler lock and key - Google Patents

Abstract

A tubular lock of the kind having a body and a barrel assembly which is mounted within the body for relative rotation about an axis. The assembly includes a tubular sleeve (4) and a number of disc tumblers located within the sleeve (4) so that each is rotatable relative to the sleeve and relative to one another about the axis. A side locking bar (9) is operative to prevent rotation of the assembly relative to the body, and that bar is rendered inoperative by insertion of a correct key into the lock keyway. The disc tumblers rotate in response to insertion of a key into the keyway and include a number of standard tumblers and a special tumbler. The locking bar (9) is inoperative when each standard tumbler is at a service position of rotation and the special tumber is at either a service position or a second function position of rotation. A service key (20) is operable to place all tumblers at the service position, and a special change key is operable to place the special tumber at the second function position and to place all other tumblers at the service position. When the special tumbler is at the second function position it releases a movable detent (23) which is otherwise operative to prevent axial removal of the assembly (2) from the body. But such removal is not possible until the change key is turned to rotate the assembly to a position at which a fixed detent (28) is aligned with a longitudinal groove (33) of the body. The key (20) is formed by use of a computer controlled machine which enables selection of any one of a number of key forming operation sequences, each of which produces a key (20) having characteristics to suit a particular lock.

Description

LOCK WITH DISC AND KEY TUMBATOR The present invention relates to locks with cylinders of the type having a barrel that is mounted so that it can rotate in an outer housing or cylinder, and also that have a mechanism that is released with a key that works to prevent the barrel from turning in relation to the cylinder when the correct key is not placed inside the eye of the lock. In particular, the invention has to do with locks in which the key release mechanism includes turn locks with rotating discs. In general, locks of the aforementioned type have a relatively complex construction and include a large number of parts. As a result, the manufacture of these locks is relatively expensive. Locks of this type are subject of study in U.S. Patent Nos. 4512166 (Dunphy l) ~ and 4624119 (Dunphy 2). Many locks, including locks Dunphy, include a device to change the closure combination. Generally, this change involves removing the barrel assembly from the lock and replacing it with another barrel assembly that opens with a different key than the one that operated the original barrel assembly. It is common the case in which the change of the barrel is achieved using a special change key and this key works in the required way due to the aspect that can be easily identified by a visual inspection of the key. For example, in the case of the Dunphy lock the relevant aspect is the particular configuration at the tip end of the key blade that is clearly observed and can be duplicated with relative ease. An object of the present invention is to provide a cylinder lock that rotates in a disk having a relatively easy construction. Another object of the present invention is to provide a lock having a device for changing the barrel that is relatively simple. Still another object of the invention is to provide a device for the change of the barrel that includes the use of a special change key, in appearance, does not have any significant difference compared to the service key that is used to operate the lock under normal conditions . Still another object of the invention is to provide an improved method for making the key that is used with the lock with cylinder of turns on a disk. A further object of the present invention is to provide a key operated to allow removal of the barrel assembly from the cylinder lock, in appearance, it has no difference with the service key for use with the same lock. According to one aspect of the present invention, the disc lock with a disc is characterized in that it includes a side closure bar which cooperates with one or more of the discs of the turn lock so that it moves between the locked and open positions. , in which the bar prevents and allows, respectively, the rotation of the barrel assembly in relation to the cylinder. When the side closing bar is in the locked position it extends through a separation plate between the closing barrel and the cylinder, thus preventing the rotation of the barrel in relation to the cylinder. Preferably, the bar is placed in the locked position upon engagement with an outer peripheral surface of at least one of the discs of the tumbler. Preferably, each disc of the tumbler has a depression in the outer peripheral surface that fits the receptacle part of the closure bar such that this bar can be moved radially forward from a distance sufficient to assume the free position in which the barrel can rotate in relation to the cylinder. It is preferred that the tumbler discs are disposed facing each other within the tubular sleeve or housing and that there are no intervening components such as a spacer plate between each pair of adjacent discs., at least in most cases. In addition, it is preferred that the adjacent discs be arranged one on top of the other. The disc lock with discs according to another aspect of the invention is characterized in that it includes a barrel retention mechanism which, when activated, prevents removal of the barrel assembly from the lock cylinder, and which can be modified to an inactive condition in such a way as to allow the removal of the whole barrel. One feature of the lock is that at least one of the disc drums controls the transfer of the barrel retention mechanism between its active and inactive condition. It is preferred that the lock having a barrel retention mechanism includes rotating disc drums and further it is preferred that the lock include a side, locking bar that cooperates with one or more of the tumbler discs so that it moves between the locked and free positions in which the bar prevents and allows, respectively, the turn of the barrel assembly in relation to the cylinder. The tumbler discs can be placed to respond when a key is inserted, substantially, in the same way as the tumbler discs of the Dunphy locks. That is, the insertion of the correct service key in the keyhole causes each of the discs of the tumbler to assume a rotational position in which the lateral closing bar can move towards the free position and therefore allows the rotation of the barrel of the lock in relation to the cylinder. The removable barrel assembly is mounted so that it can rotate within the inner diameter of the barrel and moves axially through one end of the inner diameter during the barrel changing operation. The barrel retention mechanism, which controls the ability of the barrel assembly to be removed from the barrel, may include at least one stop which, when activated, interacts between the barrel and the barrel assembly to prevent movement of the barrel assembly through the aforementioned end of the inner diameter of the cylinder. It is preferred that at least one of the discs of the tumbler (hereinafter referred to as a dual function disc) controls the condition of the aforementioned arrest. The arrangement is such that the dual or double function disc allows the arrest to adopt a deactivated condition when the disc has a particular rotating position (the second function position) in relation to each of the adjacent discs of the barrel assembly. This second function of the rotating position is different from the rotating position (service position) adopted by the double function disc when the correct service key is inserted in the keyhole. In standard disc drum closures, it is usual for the bag in which each disc must have a predetermined rotational position relative to the other disc, to allow the barrel to rotate relative to the cylinder. By contrast, in the lock according to the second aspect of the invention, the disc for the barrel release has two rotating positions, the first position is achieved with the use of the correct service key, and the second position is achieved with the use of a special change key. It is preferred that stopping the barrel be placed in the inactive position when the dual function disc adopts the second function in the rotating position, but remains active when the double function disc assumes the rotating service position. According to another aspect of the invention, there is provided an apparatus for manufacturing a key for use with the disk drum lock and which includes an elongated blade having sections inserted into the tumbler at locations spaced in the longitudinal direction of the blade and a sloping ramp surface between each pair of adjacent graduation or adjustment sections; the apparatus includes a rotary clamping device to which a blind key can be secured, so that the elongated blade of the blind key, extending from the device to the longitudinal axis of the blade, can be released, coincides, substantially, with the axis of rotation of the device, forming the mechanisms that can be operated to treat the longitudinal surface of the sheet and, therefore, form the graduation or adjustment sections as well as the ramp surfaces, the first mechanism of impulse is operated to cause rotation of the clamping device about the axis of rotation, the second mechanism is operated to cause relative movement between the device and the forming mechanism in the direction of the axis of rotation, and the control mechanism is operates to control the operation of each of the pulse mechanisms according to a sequence of operation, previously selected, which includes, operating the first and second drive mechanisms between each pair of operations for the formation of the successive adjustment section such that the device moves through a predetermined rotation angle and quantity, of the relative movement occurring in the direction of the axis of rotation, and the operation to pause the first pulse mechanism during each of the operations for the formation of the adjustment section. In accordance with another aspect of the invention, there is provided a method for manufacturing the key that is used with the disk drum lock and which includes an elongate blade having a plurality of tumbler adjustment sections and a plurality of sloping ramp surfaces arranged in alternating sequence along at least part of the length of the sheet; the method includes the steps of: securing, in a manner that can be released, the blind key to a rotary clamping device so that the elongate blade of the blind key extends from the device and the longitudinal axis of the blade substantially coincides with the axis of rotation of the device; selecting a sequence of operations of a plurality of previously established sequence of operations for the formation of the key, each of the sequences includes, successively forming each of the plurality of adjustment sections on the sheet at respective places that are they separate in the longitudinal direction of the sheet, forming the surface of the ramp in the sheet, between each of the operations for the formation of the adjustment section, successive, hold the sheet to prevent movement around the axis of rotation during each of the forming operations of the rotating section, and moving the blade about the axis of rotation at a predetermined angle of rotation during each of the operations for the formation of the ramp surface; and cause the apparatus to proceed automatically through the sequence of selected operations. It is preferred that each of the adjustment sections be formed by two forming tools such as rotating cutters that are placed on the opposite sides of the blank key sheet respectively and move in the direction of the other when the section is formed adjustment on the sheet. Furthermore, it is preferred that the blind key be rotated about the longitudinal axis of the sheet after each adjustment section is formed, so that the rotating position of the sheet is different in each operation of forming the successive adjustment section. Of course, it is possible that the rotational position of the blind key can be the same during two or more operations for the formation of the graduation or adjustment section. The rotation of the blind key can be controlled electronically by a control mechanism that is selectively programmed to establish a series of previously selected rotation positions for the blind key during the sheet forming operation. Furthermore, it is preferred that the mechanism for electronic control determines the position along the length of the sheet in which each adjustment section is formed. The forming tools and / or the blind key can be moved in the longitudinal direction of the sheet to achieve the correct relative position in which the forming operation of the adjustment section is performed. The key, according to the invention, is characterized in that it includes an elongated blade having a plurality of graduation sections of the tumbler arranged in a separate relationship in the longitudinal direction of the blade. Each adjustment section is adapted to cooperate with a respective rotating disk drum of a cylinder lock and is operated to cause the tumbler to assume a rotational position in which the lock is released. At least two of the adjustment sections have a different angular arrangement as defined herein, and at least one of the adjustment sections is operated to control the rotating position of the tumbler as well as the mechanism for controlling the retention of the barrel. which is operated to prevent removal of the barrel assembly from the cylinder body of the lock. It is preferred that the aforementioned adjustment section be placed between the other two adjustment sections. The angular arrangement of one of the adjustment sections relative to the other is the angular relationship between the median plane of one of the sections and the corresponding plane of the other, and in each case, the median plane includes the longitudinal axis of the section. key sheet. The embodiments of the invention are described below in the specification, which refers to the accompanying drawings. However, the drawings are a simple illustration of the way in which the invention can be realized, so that the specific form and arrangement of the various aspects, as shown, are not considered a limitation of the invention. In the drawings: Figure 1 is an enlarged, semi-diagrammatic view of the lock according to an embodiment of the invention, and some aspects in detail have been omitted in this view for convenience of illustration. Figure 2 is an end view of the assembled lock shown in Figure 1. Figure 3 is a perspective view of the barrel assembly of the lock shown in Figures 1 and 2. Figure 4 is a cross-sectional view taken along line IV-IV of Figure 1. Figure 5 is a cross-sectional view taken along line VV of Figure 1. Figure 6 is a sectional view cross section taken along line IV-IB of Figure 5 and showing the lock in its closed or locked condition.

Figure 7 is a cross-sectional view taken along line VII-VII of Figure 6 and showing the lock in its closed or locked condition. Figure 8 is a diagrammatic view showing the lock in a locked condition. Figure 9 is a view similar to that of Figure 8 but showing a standard disc drum rotating, by the action of the key, to the position in which the lateral locking bar is inoperative. Figure 10 is a view similar to that of Figure 9 but in which the barrel assembly is shown rotating from the locked condition shown in Figure 8. Figure 11 is a perspective view of a dual function disc special that is used in an embodiment of the invention. Figure 12 is a cross-sectional view taken along lines XII-XII of Figure 5. Figure 13 is a cross-sectional view taken along line XIII-XIII of Figure 5. Figure 14 is a cross-sectional view along the body of the lock of an embodiment of the invention. Figure 15 is a view similar to that of Figure 8, but in which a dual-function disc is shown rather than the standard disc tumbler shown in Figures 8 through 10, and which also illustrates the use of the service key as shown in Figure 9 and 10. Figure 16 is a view similar to that of Figure 15, but in which the use of a special change key is shown which allows the side tie bar to be put in inoperative position and simultaneously allows the release of the mobile stop that prevents the barrel assembly from being removed from the body of the lock. Figure 17 is a view similar to that of Figure 16 but in which the barrel assembly is shown rotating from the locked position shown in Figure 16. Figure 18 is a perspective view of the special change key of the type referred to in relation to Figures 16 and 17. Figure 19 is a cross-sectional view, on an enlarged scale, taken along line XIX-XIX of Figure 18. Figure 20 is a sectional view transverse, enlarged, taken along line XX-XX of Figure 18. Figure 21 is an enlarged, cross-sectional view taken along line XXI-XXI of Figure 18.

Figure 22 is a diagrammatic view of one form of apparatus for making the key that is used with the lock shown in Figure 1. Figure 23 is a diagrammatic representation of the manner in which the apparatus operates of Figure 22. Figure 24 is a cross-sectional view of a partially formed key blade which has been treated in the apparatus of Figures 22 and 23. Figure 25 is a view similar to Figure 22 but in FIG. which shows an alternative form of the apparatus. Figure 26 is a diagrammatic view of a support form for the blind key that is treated with the apparatus of Figure 25. Figure 27 is a diagrammatic view of the programmable apparatus for forming the key according to a shape of carrying out the invention. Figure 28 is a diagrammatic view of one form of the apparatus for forming the key according to the invention. The lock includes a cylinder body 1 and a barrel assembly 2 that is adapted to be mounted, so that it can rotate, in the internal diameter of the cylinder 3 of the body 1, as illustrated by diagrams, in the views cross-sectional shapes that make up Figure 4 to 7. In the particular arrangement showing the barrel assembly 1, a tubular, cylindrical sleeve 4 is included that is rotatably positioned inside the internal diameter 3, and a plurality of discs of the tumbler 5, each of which is mounted so that it can rotate inside the sleeve 4. The arrangement shown in the drawings includes snow discs 5, but the number may be greater or less, depending on the requirements. The barrel assembly 2 rotates about the axis A (Figure 4) relative to the body 1, and the discs of the tumbler 5 rotate about the axis A relative to the sleeve 4. Preferably, each disc is circular, as shown , and has an axial flange 6 of a reduced diameter extending a short distance from each side. However, it should be understood that the ridges 6 are not essential and that the disc 5 may have a single flange 6 instead of two as shown. The opening of the keyhole 7 extends axially through each disk 5, and the opening will have the shape that suits the key to be used with the lock. At least one cam face 8 (Figure 6) is placed on the terminal surface of the disk near the opening 7, and in this regard, each disk 5 may be similar to the tumbler discs described in the Dunphy patents. That is, it is preferred that each disk 5 be positioned to act together with the key in the same general manner as described in the Dunphy patents, the description of which is referred to herein by reference. The side tie bar 9 (Figure 3) is placed in the particular barrel assembly 2 shown, and the bar 9 cooperates both with the cylinder body 1 and with the discs of the tumbler 5, in such a way that the capacity of the barrel assembly 2 to be rotated in relation to the cylinder body 1 is controlled. it is shown as a member in the form of a cylindrical bar, but it is understood that it may have other shapes in the lock according to the invention. The bar 9 is placed inside a slot 10 with the appropriate dimensions which, as can be seen better in Figure 1, it is formed through the wall of the sleeve 4 and extends longitudinally in the sleeve. As best seen in Figure 4, the bar 9 is positioned to rest on the outer cylindrical surface 11 of each disc of the tumbler 5, so that it assumes the locked position shown in Figure 7. When the bar 9 is in the locked position, it is placed inside the slot 12 (Figures 2, 4 and 7) formed around the surface of the internal diameter of the cylinder 3. It will be apparent that when the bar 9 is in the locked position, it extends through of the plane of separation between the body 1 and the assembly 2 and, therefore, act both with the body of the cylinder 1 and with the sleeve 4, to avoid the relative rotation of the barrel assembly 2. The rotation of the barrel assembly 2 in relation to the cylinder body 1 is not possible unless the rod 9 moves radially inwardly of the sleeve 4 so that the cylinder surface of the rod 9 does not project beyond the outer surface of the cylinder 13 of the sleeve 4. This movement is possible when each of the discs 5 has a predetermined rotational position relative to the sleeve 4 as will be described below, and this rotational position will be referred to as the service position. Each disc 5 has at least one depression 14 (FIGS. 1 and 7) formed on the outer surface of the cylinder 11, and each depression 14 has a dimension and such shape to receive the portion of the bar 9 and allow the bar to move radially inward to a sufficient extent to release the barrel assembly 2 to rotate relative to the body 1. It is preferred that, as shown in Figure 7, the groove 12 of the cylinder body 1 have a sloping side surface that it helps the bar 9 to have a cam movement in the slot 12 as will be described below. It is further preferred that each disc 5 has two depressions 14 placed with a 180 ° spacing. In the particular lock, the discs 5 shown may have a 360 ° rotation relative to the sleeve 4, while the insertion of the key into the lock may cause each disc 5 to rotate at an angle less than 360 °. Therefore, it is necessary to provide two depressions 14 to ensure that the key causes any of the depressions to be correctly positioned to receive the locking bar 9. Any suitable mechanism can be employed to retain the bar 9 completely separate from the barrel sleeve 4 Furthermore, any suitable mechanism for retaining the disks 5 in assembly with the sleeve 4 can be employed. In the particular arrangement shown, this mechanism for retaining the disc includes a terminal cap 16 that fits over the outer end of the disc. barrel sleeve 4 as shown in Figures 2 and 3. An outer, circumferential wall 17 of the lid 16 is superimposed on the end portion of the sleeve 4, as best seen in Figure 4, and a spacer 15 is placed between the cover 16 and the adjacent disc 5. The end cap 16 serves to prevent the escape of the discs 5 through the front end of the sleeve 4, and a restrained fastener. 18 serves to retain the disks 5 and prevent them from escaping or coming out through the rear end of the sleeve 4. The end cap 16 has an opening 19 for the passage of the key into the keyhole.

When the correct service key is fully inserted into the keyhole, each of the discs will have a rotating position (the rotation service position) so that the depressions of the discs 14 are aligned in the axial direction of the assembly of the barrel 2. In addition. the aligned depressions 14 will be placed directly below the locking bar 9. Under these circumstances, the rotation torque applied to the barrel assembly 2 causes the bar 9 to have a cam movement in the groove 12 to be placed within the aligned depressions 14. Accordingly, the barrel assembly 2 can be rotated a sufficient distance to operate a pin or bolt, for example, to which the lock is connected. Figures 8 to 10 illustrate, diagrammatically, the operation of the lock as described above. Only one of the discs 5 is shown in each of the Figures, and it is a standard disc 5 that differs from the special disc 5 (a) shown in Figure 7 and will be explained below. Figure 7 shows the lock without the key in the eyes of the lock 7 of the discs 5, and it will be understood that each disc 5, other than the particular disc shown, may have a rotational position different from that shown in Figure 8. Figure 9 illustrates a service key 20 inserted into the eye of the lock, and that results in each of the depressions in the disk 14 being aligned as described above. Figure 10 shows the barrel assembly 2 rotated by the mechanisms of the service key 20. Any suitable mechanism can be adopted to tilt the barbell 9 radially outward and cause it to be repositioned in the groove of the cylinder 12 when the barrel assembly 2 is returned to the rotating position shown in Figure 8. In the particular arrangement shown the tilting mechanism is formed by two springs or circular springs 21, each is placed inside the sleeve 4 to press outward against the inner side of the bar 9 as shown in the Figure. It is preferred that the lock be arranged to allow removal of the barrel 2 assembly to repair or replace any part. In the arrangement shown, the barrel assembly 2 is adapted to move in and out of the internal diameter of the cylinder 3 by means of an outer end 22 (Figure 1) of the body 1. Removal or removal of the cylinder assembly 2 of the cylinder body 1 is normally prevented by the barrel retention mechanism, which in the example shown, includes at least one movable stop 23 arranged to move between an active condition in which removal is prevented of the whole barrel, and an inactive condition in which the withdrawal of the barrel is allowed, subject perhaps to other conditions that are satisfied as will be discussed below. In the particular arrangement shown, the stop 23 is in the form of a ball that is preferably made of metal, but may have other shapes (e.g., a roller) that can be used as well as other materials. The stopping ball 23 is made into a suitably shaped pocket 24 (Figure 1) formed in the barrel sleeve so that it is retained preventing relative movement both in the axial direction and circumference of the sleeve 4. On the other hand, the The ball 23 is capable of moving radially in relation to the sleeve 4. The stop ball 23 has an active condition when it links the plane of separation between the internal diameter of the cylinder 3 and the barrel sleeve 4 as shown in Figure 6. In the particular arrangement shown, less than 15% of the ball 23 is normally placed within the circumferentially extending groove 25 formed in the internal diameter of the cylinder 3, and as shown in Figures 6 and 7, the sphere 23 is retained within the slot when engaging the outer cylindrical surface 11 of one of the discs 5. This particular disc will be referred to as "the dual function disc" and will be identified with the disc. "5 (a)" When the sphere 23 is in the active condition as shown in Figures 6 and 7, the axial movement of the barrel assembly 2 outside the internal diameter of the cylinder 3 when engaging between the sphere or ball 23 and the side of the groove 25 is avoided. The tumbler of the particular disc 5 (a) shown in Figure 11 it has a depression 27 having the shape and dimension to receive part of the ball 23. The arrangement is such that, when the ball 23 is located within the depression 27 it no longer projects into the slot 25 and, therefore, it becomes inactive. As a result, the barrel assembly 2 moves freely, axially, outside the internal diameter of the cylinder 3, but in the preferred arrangement described herein, this is subject to other conditions that are satisfied. The depression 27 may be a part of the spherical depression as shown in Figure 11, or it may be a groove extending axially with a cylindrical part, or any other suitable shape, as shown in Figures 15 to FIG. 17. It is preferred that the depression 27 has a shape such that it can not receive the tie bar 9, or at least a significant part of the bar. Depression 27 can be omitted in another version of disk 58 (a) shown in Figure 7 and explained herein. In the particular arrangement illustrated by the drawings, the lock includes two spheres or retaining balls 23, each of which is placed in the sleeve 4 in a diametrically opposite relationship. Therefore, two depressions positioned in a similar manner 27 are provided in the disc version 5 (a) as shown in Figures 11 and 15 through 17. It is preferred that the barrel retention mechanism includes at least one fixed stop 28 additional to the mobile detention balls 23. In the particular arrangement shown there are five fixed detentions 28 (Figures 1 and 5), but the number may be smaller or larger, according to the requirements. Each stop 28 is fixed to or integral with the sleeve 4 so as to project outwardly beyond the outer surface 13 of the sleeve 4. The detents 28 may have any suitable shape, but in the arrangement shown each is formed separately from the sleeve 4 and has a body 29 and a projection 30. The body 29 of each stop 28 is positioned within a number of circumferential grooves 31 (Figure 1) formed through the wall of the sleeve 4, and secured to the wall in any suitable manner, so that the projection 30 of the stop 28 protrudes beyond the surface of the sleeve 13, as best seen in Figure 5.

In the particular arrangement shown, three detents 28 are placed on one side of the sleeve 4 and are arranged in a separate relationship along the line extending parallel to the axis of rotation A. The other two detentions 28 are placed at the other side of the sleeve 4, and these two detentions 28 are also separated along the line extending parallel to the axis of rotation A. Preferably, the two stop means 28 have a 180 ° separation around the circumference of the sleeve 4 as shown in Figure 13. It is also preferred that each stop 28 of the group of two, is aligned with the adjacent stop, respectively, 28 of the group of three. The unaligned arrest 28 of the group of three onwards will be identified with the numerical reference "28a". Each of the detents 28 slides within the circumferential groove 32 formed in the surface of the internal diameter 3. Since the group of detentions 28 was described above, the three circumferential grooves 32 are arranged in the body 1 of a particular arrangement, and these grooves 32 are separated in the axial direction of the body 1 so that each one is placed in opposition to the other of the three grooves 31 of the sleeve 4 as shown in Figure 1. It will be appreciated that, due to the fixed nature of the detentions 28, the axial movement of the barrel assembly 2 out of the body 1 is not possible while any of the detentions 28 remain confined within their respective tension slot 32. Therefore, at least one of the slots to release the barrel 33 is formed on the surface of the internal diameter 3 so that it extends in the axial direction of the internal diameter. Due to the particular group of detentions 28 described above, the particular lock illustrated in the accompanying drawings has two slots for releasing the barrel - positioned with a 180 ° separation around the circumference of the internal diameter 3. In the construction shown , the slot of the lock bar 12 duplicates the grooves for the barrel release, but other arrangements can be adopted. Both slots 12 and 33 are sized to receive, so that they can slide, the projection of the stop 30. Removal of the barrel 2 assembly from the body of the lock 1 is only possible when each of the stopping projections 30 is in a longitudinal alignment with one of the grooves 12 and 33. However, it is preferred that removal of the barrel assembly 2 is possible only in a rotational position of the assembly, which will be referred to below as the barrel removal position. . This can be achieved in several ways, but in the arrangement shown, it is obtained by limiting the longitudinal size of the slot 33 so that the stop 28a is not able to enter the slot (Figures 4 and 14). In the arrangement shown, the groove of the tie bar 12 extends through both ends of the body 1, while the groove 33 only extends through the outer end 34 (Figure 1 and 14) of the body. The internal, longitudinal blind end 35 (Figure 14) of the slot 33 is placed outwardly from the circumferential groove 32 within which the projection 30 of the stop 28a runs. That is, the stop 28a is placed between the blind end of the groove 35 and the inner end 36 of the body 1. Therefore, the arrangement is such that the longitudinal groove 12 intercepts each of the three circumferential grooves 32, while the longitudinal slot 33 intercepts only two of the three circumferential grooves 32. As a result of this, it is only possible to move the barrel assembly 2 axially out of the body 1 through the terminal end 34 thereof, when the projection 30 of the stop 28a is in longitudinal alignment with the slot 12. A special shift key 37 (Figures 16 and 17) is used to cause the disc 5 (a) to assume the rotating position in which, each ball 23 can enter one of the respective depressions 27. When the service key 20 is used, the disc 5 (a) has the rotational position shown in Figure 15, in which the barrel 2 assembly is It is released by rotation relative to the body 1. However, the stop balls 23 remain inside the slot 25 and thus the relative axial movement of the barrel assembly 2 is prevented. When the special key 37 is used as shown in FIG. Figure 16, the rotating position of the disc 5 (a) is different from that shown in Figure 15. In particular, each depression 27 is positioned to receive one of the balls 23, whereas this is not the case when it is used for service key 20. On the other hand, the special key 37 is preferred, so that in Figure 16 the condition of each of the discs 5, provided that it is not the double function discs 5 (a), has the same rotating position (service position) as when used the service key 20. Since the rotating position in Figure 16 of the disc 5 (a) is different from the condition of Figure 15, the depression 15 of the disc 5 (a) will not be placed correctly on the locking bar 9 Therefore, it is necessary to foresee that the locking bar 9 can move towards the free position when the disc 58 (a) is either in the rotational position of Figure 15 or in the position of Figure 16. That is, disk 5 (a) must have a second service position, or a second group of service positions. In a particular arrangement shown this is achieved by providing the disc 5 (a) with a peripheral depression 38 corresponding to the depression 14 in size as well as in shape, and which is placed below the tie bar 9 in the condition of Figure 16. Thus, when the lock is in the condition of Figure 16 it is possible to rotate the barrel assembly 2 in relation to the cylinder body 1 (Figure 17) and thereby rotate the assembly 2 towards the position in which the barrel is released as referred to above, where it is possible to move the assembly 2 axially outside the inside diameter of the cylinder 3. It will be appreciated that the depressions 14 and 38 need not be separated as shown, but can be combine to form a single depression that has sufficient circumferential space to allow the operation of the lock as described above. In addition, each of the disc depressions 14, 27 and 38 can be duplicated as shown in the accompanying drawings and can have two detentions 23 also as illustrated in the drawings. Summing up what has been said up to now, the withdrawal of the barrel can not be achieved using the service key 20 since the key can not be placed on the disc 5 (a) to allow the release of the mobile detentions 23. This placement of the disc 5 (a) is achieved with the use of the shift key 37, and in the described arrangement the side tie rod is deactivated in this rotary position of the disc 5 (a). But additional manipulation of the lock is needed to achieve axial removal of the assembly 2, and this includes turning the key 37 from the initial position, fully inserted, to rotate the assembly 2 towards the position where the barrel is released in the which projections of the various detents 30 align with any of the slots 12 and 33. Furthermore, in the construction described, this removal of the assembly 2 is subject to the arrest 28a which is aligned with the slot 12. The double function disc 5 (a) as shown in Figures 11 and 15 through 17, has three pairs of peripheral depressions, each pair includes two depressions. That is, there are two wall depressions for the sidebar-namely, depressions 14 and 38-and there is a pair of stop depressions 27. Figure 7 shows another form of double function disc 5 (a) that only has a couple of depressions. A pair, depressions 14, have two functions. When the disk 58a9 is placed, by means of the service key 20, one of the depressions 14 is able to receive part of the side tie bar 9 and, thus, release the barrel assembly 2 so that it turns relative to the body of the lock 1. When the disk 5 (a) is placed, by means of the shift key 37, each of the depressions 14 is placed in radial alignment with respect to one of the stopping balls 28, and one of the depressions 38 is positioned for receive part of the side tie bar. Thus, disc 5 (a) is able to deactivate the side tie bar and stop balls 28 by having only two wall of depressions instead of three, as seen in the arrangement of Figure 11. An advantage of the The arrangement of Figure 7 is that it would be very difficult to distinguish the dual function disc 5 (a) from the standard discs 5 in circumstances in which each standard disc 5 has two wall depressions on the surface. Standard disks 6 of this type can be used in the master key system. That is, a couple of depressions will be activated during the operation of the service key, and the other pair will be activated during the operation of the master key. Preferably, the angular (circumferential) spacing between the depressions of the service key and the master of each standard disc 5 is different from the angular separation between the depressions 14 and 38 of the dual function disc 5 (a). In addition, the angular separation of the standard disc 5 need not be the same between two or more of the standard 5 discs of the lock. Each of the keys 20 and 37 can be the same for the section of the blade of the key that controls the rotary position of the free disk of the barrel 5 (a). Therefore, it is difficult to visually determine the characteristic of the key 37 that allows its use for the purposes of changing the barrel and that increases the safety of the lock system. The keys 20 and 37 may have substantially the same shape as the keys described in the Dunphy patents, except that the keysheets do not need to have a tip configuration or other special arrangement as mentioned in the Dunphy patents. Figures 18 and 21 show a special change key 37 that is similar to the key presented in the Dunphy patents. The elongate blade 39 of the key 37 as shown, is basically cylindrical in shape, but other transverse shapes can be used for the blade 39. The blade 39 is processed or treated, preferably by means of a material removal process, to create a plurality of sections for the adjustment of the tumbler 40 that are separated in the longitudinal direction of the blade 39. In the particular arrangement shown, each adjustment section or graduation 40 has two facing, opposite surfaces 41 that are placed on the respective opposite sides of the axis of the blade 42. The cross-sectional shape of each section 40 is substantially the same, as evidenced by Figures 19 to 21, and this shape is such as to allow passage of the blade of the blade. key 39 through the openings of the tumbler disk 7.

The graduation sections 40 must be arranged in such a way that the key 37 is able to manipulate the disks 5 of the tumbler so that the depressions of the disc 14 and 38 are aligned as discussed above and capable of receiving the locking bar 9. For this purpose, each section 40 must have a particular angular arrangement, relative to the reference plane 43 so that the disc of the tumbler 5 controlled by the section 40 takes the appropriate rotational position in relation to each of the other discs. The angular arrangement is that which lies between the reference plane 43, which can be selected arbitrarily, and a median plane 44 of the relevant section 40. The middle plane 44 is disposed substantially midway between the surfaces of the section 41 and contains the axis of the blade 42. Each of Figures 19 to 21 is a cross-sectional view of the respective three adjustment sections 40 of blade 39, and it will be appreciated that in each In this case, the middle plane of the section 44 has a different angular relationship with the reference plane 43. However, it is possible that the angular relationship may be the same for two or more adjustment sections 40 of a particular key. The service key for operating the same lock for which the key of Figure 18 is designed, can have an appearance almost equal to that of key 37. In fact, it is only necessary that there is a difference between the two keys, and that the difference is not easy to detect with a visual inspection. Assuming that the adjustment section 40 shown in Figure 19 is the section that controls the dual function disc 5 (a), the angular arrangement of the corresponding section of the service key 20 will be different from that which is shown in Figure 19, and that there may be only one difference between the two keys. The angular arrangement illustrated in Figure 19 will be selected to align the depression 38 of the disc 5 (a) with the depression 14 of the other discs 5, while the angular arrangement of the same section 40 of the service key 20 is will be selected to align the depression 14 of the disc 5 (a) with the depressions 14 of the other discs 5. The adjustment sections 40 and the surfaces of the sloping ramp 45 of the profiled sheet 39 can be made in any suitable manner. According to the method shown, in diagram, in Figure 22, there are two circular cutters 46 or other tools for making the surface, suitable, that move back and forth to each other, in a radial direction. Each cutter 46 is adapted to form the respective surface 41 of the adjustment section 40 as shown, by means of a diagram, in Figure 23. Before commencing the cutting operation of the key blade, the cutters 46 are place with respect to the other, as shown in Figure 22, so that the cut is formed with the depth required on the cylindrical surface of the blade of the key 39. The key 37 is held by means of a tool sleeve 47 which is assembled to allow the blade of the key 39 to move longitudinally in the gap between the cutters 46. The tool holder sleeve 47 is rotated about the axis of rotation as the blade 39 moves longitudinally between the cutters 46, by which produces a twisted travel that is evidenced in Figure 18. The direction of rotation of the tool sleeve 47 can be reversed on one or more occasions during the formation process of the route. The rotation of the tool sleeve 47 is briefly stopped during the formation of each adjustment section 40, and then restarted as the cutters 46 move past the relevant section 40 to form an associated travel ramp surface. which reacts with discs 5 to cause disc rotation. On the one hand, it is preferred that the longitudinal movement of the blade 39 in relation to the cutters 46 continues uninterrupted during the process of forming the entire sheet. When the sheet cutting operation is completed, the cutters 46 can be removed as represented by the dotted lines in Figure 22 so that the key blade 39 can be removed from the place where it is placed between the cutters 46. Figure 25 shows a variation of the The arrangement shown in Figure 22. It is intended that the variation operate essentially in the same way as the arrangement in Figure 22, except for the changes that are necessary due to the use of a forming tool instead of two tools trainers The blind key 48 shown in Figure 25 is not the only blind key form in which the invention can be applied, and the cutter or other forming tool 46 need not have the particular configuration shown in Figure 25. For example, the blind key can be a cylindrical bar, and a key head can be secured at one end of the bar after the sheet 48 is treated with the key forming apparatus. Although Figure 25 shows the use of a type of rotary cutter of the training tool, it should be understood that other types of tools can be used. For example, the forming tool can be a milling cutter or other similar tool. In addition, the configuration of the blind key can be formed with a laser cutter or any other suitable forming technique. In the example arrangement shown, the sheet 39 for the key 48 has a substantially cylindrical shape and it is intended to treat the sheet 39 with the tool 46 so as to form the adjustment sections 40 and the ramp surfaces. 45 of the general type that was previously described. For this purpose, the blade of the key 48 moves axially in relation to the tool 46 (which is rotated) and the tool 46 moves transverse in relation to the blade 39 as shown by arrows in Figure 25. As shown in Figures 19 to 21, the example key referred to requires the present of two corresponding adjustment surface 41 on the respective opposite sides of the sheet 39. Normally, it will be the case that two or more pairs of surfaces 41 will have separate intervals at along the length of the sheet 39. Therefore, it is necessary that the blade 39 rotate 180 ° to allow the tool 46 of the arrangement of Figure 25 to form each of the surfaces 41 of each adjustment section 40, and that the tool 46 moves laterally outwards to release the blade 30 allowing rotation to take place. Any suitable control mechanism, such as computer control system, can be used to ensure the precise formation of each of the sections 40. The same system can ensure the precise formation of the surfaces of the ramp 45 intervening between the sections of fit adjacent, but axially separated 40.

Thus, when the blade of the key 39 is formed by means of the arrangement of Figure 25, each of the two series of adjustment and ramp surfaces 41 and 45 respectively are formed, alternately, at a different time to which the other series is formed. That is, after the formation of one of the two series, the blade 39 and the tool 46 are repositioned to allow the formation of the second series. The formation of each of the series may begin at the outer end point of the blade 39, but it is not essential, nor is it essential that each series begin at or near the same end of the blade 39. It is preferred that each series be form without interrupting the longitudinal movement between the blade 39 and the tool 46. On the other hand, the relative rotation of the blade 39 will stop and can be reversed on one or more occasions. In the arrangement of Figure 25, it may be desirable to hold the blade 39 to prevent it from tilting during the forming operation. For example, the blade 39 can be supported on the opposite side so that it engages with the tool 46 during the forming operation. An example of the support 49 is shown in Figure 25, and the support 49 can be set or moved according to the requirements. For example, the holder 40 can move towards and away from the axis of the blade 39. If the support moves, this movement can be controlled by means of a system that controls the movement of the tool 46. The same system can also control the axial movement of the key blade 48. The blade 30 can be supported on any of the variety of forming, including the use of a central support 50 similar to what is commonly mounted on the moving head of the lathes. This arrangement is shown in Figure 26. If desired, a center support 50 can be used in conjunction with a side support 49 as mentioned above. The cutting operation of the sheet can be controlled in any suitable way, but it is preferred that the control system is of the electronic type. The blade cutting machine can be programmed to allow the formation of any group of profiles for the predetermined key blade, each of which is used with a series of specific disks 5. With reference to the arrangement of Figure 22, the electronic control system can regulate the rotation of the cutters 46 and the movement of the cutters towards and away from each other. They can also control the longitudinal movement of the blade of the key 39 through the cutters 46, and the direction as well as the angular extension of the rotation of the blade of the key 39 during each phase of the operation for cutting the blade . Thus, each change in the relative position of the blade 39 (i.e. rotation and axial movement) is controlled electronically by means of a suitable programmable control mechanism, and the same mechanism also controls the relative radial movement of the cutters. Figure 27 shows, in diagram form, an apparatus for the formation of the computer controlled key in which the machine forming the base key is indicated by the block 51. The machine 51 is controlled by means of a computer 52 which it can be loaded with a program 53 designed for the selection of any sequence number for the forming operation of the key. Each of these sequences involves a number of standard steps, but the detail of each step may vary as will be discussed below. In addition, special steps or those that are not standard can be included in some sequences. It will be convenient to refer to the computer 52 and the apparatus for the control of the machine collectively associated as a control mechanism 54. It will also be convenient to describe the sequence of operations referring to a particular arrangement of the machine, which is illustrated, in diagram, in fig. 28. The illustrated machine includes a device for holding the blade of the key, such as for example a tool sleeve 47, and at least one tool for forming the surface 46 as described above. the sleeve tool holder 47 is needed to rotate the sheet .llave 48 as described above, and for this purpose the sleeve toolholder 47 is connected to the first drive mechanism 55 which may include a reversible motor 56 in a suitable manner. It is also necessary to provide mechanism in which the tool 46 and the blade of the key 48 can move relative to each other in the axial direction of the blade 39. For this purpose, in the arrangement shown in Figure 28, the sleeve collet 47 and the drive mechanism associated 55 are mounted to guide properly moving toward and away from the tool 46 in the direction indicated by arrows 57, and the drive mechanism 58 (of any suitable type) is provided for control this movement. In the arrangement shown in Figure 28, it is also possible for the tool 46 and the blade of the key 48 to move in relation to each other in a direction transverse to the longitudinal axis of the blade 39. This relative movement can be achieved from any substantial form, for example, Figure 28 shows the tool 46 and its associated pulse motor 59 mounted for forward and backward movement from the blade 48 in the direction shown by arrows 60, and this movement is controlled by the pulse mechanism 61 of any suitable type. Any suitable mechanism can be used to guide the tool 46 in the required directions of movement. As shown in the diagram, in Figure 28, each pulse mechanism 55, 58 and 61 is connected to the control mechanism 54 in such a way that it is operated in accordance with the instructions (signals) received from the control mechanism 54. instructions will be as determined by a particular of a number of sequences of operations that are available for selection by an operator of the machine. For example, the selected sequence of operations may include the following steps: a) forming, in sequence, each of the plurality of adjustment sections on the blank key sheet at the respective locations that are separated in the longitudinal direction of the sheet, b) forming the surface of the ramp in the sheet between each of the operations for the formation of the successive adjustment sections. c) gripping the sheet to prevent movement in the axis of rotation during each operation for forming the adjustment section, and d) moving the sheet in the axis of rotation in a predetermined rotation angle during each operation for forming the surface of the ramp.

The control mechanism 54 will regulate the operation of the machine 51 in such a way that the machine will proceed automatically by the selected sequence of operations. During each of the sequences the predetermined rotation angle, mentioned above, may be different for at least two of the operations for the formation of the ramp. Also, the direction of the rotation movement of the blade may be different during each of the operations for the formation of the ramp surface. In addition, during the operation for the formation of the ramp surface, there may be a relative movement between the blade and the mechanism for forming the blade in the longitudinal direction of the blade. This relative movement can occur simultaneously with the rotation aforementioned sheet, and it is preferred that the longitudinal movement continues without interruption until formation of alternative sets of ramp surfaces and adjustment 41, 45 is completed When formed the blade of the key by means of a single cutter 46, such as that shown in Figure 28, may be convenient for forming the first series of alternative adjustment surfaces 41 and the surfaces of the ramp 45 along the length of the blade 39, and subsequently a second series of alternative adjustment surfaces 41 and the surfaces of the ramp 45 are formed along the blade 39. In this method, the rotating position of the blade 39, at the beginning of the formation of the second series will be 180 ° different from the rotating position of the blade at the beginning of the formation of the first series. It is preferred that the machine 51 be capable of operating manually in the event of a computer failure. For this purpose, the panel for the manual control 62 can be connected to the machine 51 as shown in Figure 27. The panel 62 can respond to the operation of the keyboard through which the operator can send the appropriate signals to the machine 51, and it is preferred that the panel 62 be controlled with a program that can be the same or similar to that used with the computer 52. The arrangement is such that the operator can select a particular sequence of operations, and once the section, you can give instructions to the machine 51 by means of the keyboard. The selected program preferably operates to ensure that the wrong instructions are not recognized and therefore ensures that the blade of the key will be in accordance with the particular code to which the selection of the sequence of operations is addressed. The forming method of the aforementioned type includes a relatively simple apparatus and has the benefit of allowing the exact formation of the key blade.

The lock according to the invention possesses substantial improvements in relation to the previous locks of a similar type, which includes improvements in manufacturing costs and improvements in the safety of the operation. Various alterations, modifications and / or additions can be introduced in the constructions and arrangements of the parts described above without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (53)

1. CLAIMS 1. A drum lock that includes a lock body, a barrel assembly mounted on the body for relative movement around the axis of rotation, this barrel assembly includes a plurality of disk drums, each of which rotates around a axis of rotation in relation to the other, these disc drums include, at least, a standard disc drum and at least one disc drum with dual function, and a lateral tie rod that is operated to prevent rotation of the disc assembly. barrel in relation to the body when the lock is in a locked condition, and which is deactivated to prevent rotation of the barrel assembly when each disc drum is in the service position to rotate relative to the body, and is also deactivated when the or each of the disk drums is in its respective service position and the or each of the dual disk drums is in the second position of the rotor function. tion in relation to the body. The drum lock according to claim 1, wherein at least one of the discs of the tumbler has two or more service positions. The drum lock according to claim 1 or 2, wherein the dual function disc tumbler, or at least one of the dual function disc drums, has two or more of the second rotation function positions. . The drum lock according to any of the preceding claims, which includes at least two standard disc drums. The drum lock according to any of the preceding claims, wherein each of the disk drums is disposed face to face with at least one of the other disk drums. The drum lock according to any of the preceding claims, wherein there is a drum with dual function discs. The drum lock according to any of the preceding claims, wherein the tie rod is an elongate member that is disposed substantially parallel to the axis of rotation and moves to and from the axis between the two positions in which the The bar is activated and deactivated, respectively, and the bar is extended through the plane of separation between the body and the barrel assembly when the bar is in operative position. The drum lock according to any one of the preceding claims, wherein the tread bar is held in the operative position by engaging it with the peripheral surface of at least one of the standard disc drums when this disc drum is in a rotation position different from the service position, or when engaging with a peripheral surface of at least one of the double-function disc drums when this drum is in a position other than the service position or in the second position of function. The drum lock according to claim 8, wherein at least one of the depressions to be released by the lock has on the peripheral surface of each disk drum, at least one depression that releases the barrel placed on the peripheral surface of the drum. or of each dual function disc drum, each depression to release the lock is adapted to receive the side tie bar and therefore, allows the side tie bar to assume a deactivated position when the respective tumbler disc is in position. the service position, and the depression to release the barrel is adapted to receive the side tie bar and, therefore, allow the side tie bar to assume the deactivated position when the dual function disc tumbler is in the second position. The drum lock according to claim 9, wherein the number of depressions that release the bar provided in the disc tumbler corresponds to the number of service positions of this drum, and the number of depressions to release the barrel provided in the double function disc tumbler corresponds to the number of second function positions of the tumbler. The drum lock according to claim 9 or 10, wherein the barrel assembly is removed from the body by moving axially through one end of the body, the retention mechanisms are operated to prevent this removal, and the mechanisms The retention switches are deactivated to prevent this withdrawal when the or each of the double function disc drums is in the second function position. The drum lock according to claim 11, wherein the retention mechanisms include at least one movable stop that is connected to the barrel assembly and received in the depression to release the stop of the double disc tumbler. function when the disc tumbler is in the second position of function so that the mobile stop becomes inoperative to prevent removal of the barrel assembly. The drum lock according to claim 12, wherein the double-function disk tumbler includes at least one depression to release the additional stop to at least one depression that releases the lock and at least one depression that frees the barrel. 14. The drum lock according to claim 12, wherein the double function disc tumbler includes at least one depression to release the lock and at least one depression to release the barrel, and this depression to release the barrel functions as the depression to release the stop when the double function disc tumbler is in the second function position. 15. The drum lock according to any one of claims 1 to 8, wherein the barrel assembly is removed from the body by moving axially through one end of the body, the retention mechanism is operated to prevent this. Removal, and the retention mechanism becomes inoperative to prevent removal when the or each of the double function disc drums is in the second position of function. The drum lock according to claim 15, wherein the retention mechanism includes at least one movable stop that is connected to the barrel assembly and is received in the depression that releases the stop of the double disc tumbler. function when the disc tumbler is in the second position of function so that the mobile stop becomes inoperative to prevent removal of the barrel assembly. 17. The drum lock according to any of claims 12 to 14 and 16, wherein the mobile stop is a metal sphere or ball. 18. A disc for the tumbler according to any of claims 12 to 14, 16 and 17, which includes two movable detentions which is placed with a separation of approximately 180 ° around the circumference of the barrel assembly. 19. The drum lock according to any of claims 11 to 18, wherein the retaining mechanism includes at least one fixed stop that is connected to the barrel assembly and projects beyond the radial outer surface of the barrel. barrel assembly, a circumferential groove is formed on an internal surface of the body and receives, so that it can be slid, to the fixed stop to thus allow the rotation of the barrel assembly in relation to the body of the lock, a groove for releasing the barrel is formed on the inner surface of the body and extends, generally, in the direction of the axis of rotation, and this fixed stop becomes inoperative to prevent the barrel assembly from being removed when this assembly is in the rotational position in relationship with the body, wherein the fixed stop is aligned with the slot to release the barrel so that it is received, so that it can slide, into said slot. 20. The drum lock according to claim 19, including at least two fixed stops that are separated in an axial direction from the barrel assembly, the two circumferential grooves are formed on the inner surface of the body, and each fixed stop is placed so that it can slide in the respective groove of the circumferential grooves. The drum lock according to claim 19, which includes at least, fixed detentions that are separated in a circumferential direction from the barrel assembly, the body has two slots for barrel release and each of the free stops is Align with respect to one of the slots to release the barrel when the barrel assembly is in the position for removal of the barrel. The drum lock according to claim 20, in which the two fixed stops are separated in a circumferential direction of the barrel assembly, the body has two slots for the barrel release and each of the fixed stops are aligned with the respective barrel release slot when the barrel assembly is in the barrel removal position. 23. The drum lock according to claim 21 or 22, wherein the first of the slots for the barrel release has a longitudinal extension smaller than the second of the slots for barrel release., and one of the fixed stops is placed in the barrel assembly, axially, beyond the end of the first slot for the barrel release. 24. The drum lock according to claim 23, wherein the second slot for the barrel release receives the stop bar when the lock is in the locked condition. The drum lock according to any of the preceding claim, wherein the barrel assembly includes a tubular, cylindrical sleeve, containing each disc of the tumbler, this sleeve rotates about the axis of rotation in relation to the body of the barrel. lock, and each disk of the tumbler rotates about the axis of rotation relative to the sleeve. The drum lock according to claim 25, according to any of claims 19 to 24, wherein each of the fixed detents is secured to or is integrally formed with the sleeve, and the surface outer radial is an outer surface of the sleeve. The drum lock according to any of the preceding claims, wherein each of the discs of the tumbler has a non-circular opening extending through the axial center thereof, and each of the openings is part of the Pass the keyhole to receive the key in the lock. 28. The drum lock and the combination of the key, wherein the drum lock is in accordance with any of the preceding claims and the key is a service key operated to cause the tumbler discs to assume the position of service, respective. A combination according to claim 28, wherein the service key includes an elongate blade having a plurality of adjustment sections in the tumbler that separate in the longitudinal direction of the blade and each one acts together with the disc of the tumbler so that it holds this disc in its respective service position. 30. The drum lock and key combination, in which the drum lock is in accordance with any of claims 1 to 27, and the key is a key to remove the barrel that is operated to cause the each of the standard disk drums takes a respective service position, and causes the one or each of the disk drums to take the second position of function. A combination according to claim 30, wherein the key for removing the barrel includes an elongate blade having a plurality of sections for the adjustment of the tumbler that separates in the longitudinal direction of the blade, these adjustment sections include at least one standard adjustment section and at least one special adjustment section, and this standard adjustment section acts together with the standard disc tumbler so that it retains this disc in its respective service position, and the adjustment section Special acts together with the dual function disc tumbler so that it retains the discs in their second respective function position. 32. The combination according to claim 30 or 31, wherein the key interacts with each of the discs of the tumbler during the insertion of the blade into the drum lock so as to cause rotation of each disc in relation to the body, each of the disk drums, have a service position or a second function position when the blade is fully inserted into the lock, and the key is rotated from an initial position to the position for removal of the barrel with He aimed to rotate the barrel assembly in relation to the body towards the position in which the barrel assembly can be removed from the body in the direction of the axis of rotation. 33. The key for use in a combination according to any of claims 28 to 32, wherein the key has an elongated blade that includes a plurality of disk tumbler adjustment sections positioned at separate positions in the longitudinal direction of the disk. each sheet having at least one adjustment surface of the tumbler and a sloping ramp surface extending between each pair of adjacent adjustment sections and adapted to act together with the disc tumbler so that causes rotation of the tumbler as the blade moves longitudinally in relation to the disc tumbler. 34. The key for use with a drum lock according to any of claims 1 to 27, wherein the key has an elongated blade that includes a plurality of adjustment sections of the disk tumbler in separate positions in the longitudinal direction of the sheet, each section having at least one adjustment surface of the tumbler and a ramp surface, sloping, extending between each pair of adjacent adjustment sections and adapted to act together with the disc tumbler so that it causes the rotation of the tumbler as the blade moves longitudinally relative to the disk drum. 35. The key according to claim 33 or 34, wherein each adjustment section has two adjustment surfaces, each of which is placed on one of the two opposite sides of the sheet. 36. The key according to claim 33, 34 or 35, wherein at least one of the adjustment sections is arranged at an angle relative to the reference plane containing the longitudinal axis of the sheet. 37. The apparatus for forming the key used with the tumbler lock with discs and including an elongated blade having adjustment sections of the tumbler at separate locations in the longitudinal direction of the blade, and a sloping ramp surface between each one of the adjacent adjustment sections; the apparatus includes a clamping device, which rotates, in which a blind key can be secured so that it can be released, so that the elongated blade of the blind key extends from the device and the longitudinal axis of the device. sheet substantially coincides with the axis of rotation of the device, the forming mechanism is operated to treat the longitudinal surface of the sheet and therefore forms the adjustment sections and the ramp surface, the first pulse mechanism is operated to cause the rotation of the clamping device about the axis of rotation , the second pulse mechanism operates to cause relative movement between the device and the forming mechanism in the direction of the axis of rotation, and the control mechanism that operates to control the operation of each pulse mechanism according to the selected sequence previously of the operations that include, operating the first and second impulse mechanisms between each of the adjustment sections forming operations so that the device moves through a predetermined angle of rotation and a predetermined amount of movement occurring in the direction of the axis of rotation, and stopping the operation of the first impulse mechanism during each operation training section of the adjustment section. 38. The apparatus according to claim 37, including a third drive mechanism that is operated to cause a relative movement between the device and the forming mechanism in a direction transverse to the axis of rotation. 39. The apparatus according to claim 37 or 38, wherein the forming mechanism includes at least one "tool for removing the rotating material 40. The apparatus according to claim 39, which includes two tools, each one of which is circular and rotates about an axis that extends substantially parallel to the axis of rotation of the clamping device 41. The apparatus according to claim 40, wherein the two tools are located on respective, opposite sides of the device. axis of rotation of the clamping device, and each of the tools moves to and from the axis of rotation 42. The apparatus according to any of claims 37 to 41, which includes the leaf support mechanism. to avoid lateral tilting during the sequence of operations 43. The method for forming the key that is used with a disk drum lock and including an elongated blade having a plurality d of adjustment sections of the tumbler and a plurality of surfaces of the sloping ramp disposed in alternating sequence along, at least a part of the length of the sheet, the method includes the steps of: securing so that can release the blind key so that it holds the device so that it can rotate so that the elongate blade of the blind key extends from the device and the longitudinal axis of the blade substantially coincides with the axis of rotation of the device; selects a sequence of operations from a plurality of previously established sequences of key forming operations, each of which includes, the successive formation of each of the plurality of graduation sections on the sheet at the respective locations that they separate in the longitudinal direction of the sheet, forming the surface of the ramp in the sheet between each succession of operations for the formation of the adjustment section, holding the sheet to prevent movement in relation to the axis of rotation during each operation for forming the adjustment section, and moving the blade on the axis of rotation, at a predetermined angle of rotation during each operation for the formation of the ramp surface; and cause the apparatus to proceed automatically through the sequence of selected operations. 44. The method according to claim 43, wherein the predetermined rotation angle is different for each of the operations for the formation of the ramp surface. 45. The method according to claim 43 or 44, wherein the direction of the rotation movement of the blade is different during each of the operations for the formation of the ramp surface. 46. The method according to any of claims 43 to 45, wherein the relative movement between the blade and the mechanism for forming the blade occurs in the longitudinal direction of the blade during each of the operations for the formation of the surface of the ramp. 47. The method according to claim 46, wherein the relative movement in the longitudinal direction of the sheet occurs simultaneously with the rotation at a predetermined angle. 48. The method according to claim 46 or 47, wherein the relative movement in the longitudinal direction of the sheet continues without interruption until the formation of alternating series of adjustment and ramp surfaces is completed. 49. The method according to any of claims 43 to 48, wherein the relative movement between the blade and the mechanism for blade formation occurs in the longitudinal direction of the blade during each operation for the formation of the adjustment section. 50. The method according to any of claims 43 to 49, wherein each adjustment section includes two adjustment surfaces positioned on opposite sides of the sheet. 51. The method according to claim 50, wherein the adjustment surface of each adjustment or graduation section is formed in sequence when the other adjustment surface of the section is made. 52. The method according to claim 51, wherein the first series of the adjusting surfaces and that of the ramp are alternately formed in the sheet, a second series of adjustment surfaces and that of the alternative ramp are formed in the sheet, and the position of rotation of the sheet, at the beginning of the formation of the second series has a "difference of 180 ° in the position of rotation at the beginning of the formation of the first series." 53. The method according to any of claims 43 to 52, wherein the sheet has an elongated cylindrical shape before beginning the selected sequence of operations. SUMMARY The tubular lock of the type that has a body and a barrel assembly that mounts inside the body for relative rotation around the shaft. The assembly includes a tubular sleeve and a number of disc tumblers placed inside the sleeve so that each rotates relative to the sleeve and relative to the other around the shaft. A side tie bar is operated to prevent rotation of the assembly in relation to the body and the bar is deactivated by inserting the correct key into the keyhole. The disc tumblers rotate in response to the insertion of a key into the keyhole and include a number of standard tumblers and a special tumbler. The lock bar is deactivated when each standard tumbler is in the rotation, service position, and the special tumbler is in the service position or in the second rotation position, of function. The service key is operated to place all the tumblers in the service position, and a special key is operated to place the special tumbler in the second function position and to place all the tumblers in the service position, and the special key of change is operated to place the special tumbler in the second position of function and to place all the tumblers in the service position. When the special tumbler is placed in the second function position, the mobile stop is released, which is otherwise operated to prevent axial removal of the body assembly. But this removal is not possible until the change key is rotated to rotate the assembly towards the position in which the fixed stop aligns with the longitudinal groove of the body. The key is formed with the use of a machine controlled by a computer which allows the section of any number of sequences of operation for the formation each of which produces a key that has characteristics to fit a particular lock.