EP0574752B1 - Key and corresponding lock cylinder especially a profile lock cylinder - Google Patents

Abstract

Keys for a lock cylinder, especially a profile lock cylinder, provided with a cylinder plug closed all-round and containing a correspondingly profiled keyway and with radially adjustable pin tumblers are provided with a key shank (1) which consists of solid material and which has an essentially circularly profiled solid indented region (2), provided with notches (3) worked in on its circumference and intended for the pin tumblers (10), and a longitudinal web (4), projecting radially from the indented region (2), for guidance and for rotational take-up. In order to improve such a key and a lock cylinder to be locked thereby in such a way that, by means of them, whilst the essentially circular-cylindrical cross-section of the key shank (1) and keyway is preserved and it thereby becomes possible to accommodate numerous pin tumblers (10), their improper use by corresponding pseudo blank keys becomes substantially more difficult and, at the same time, the stability of the keys is also increased considerably in the region of their longitudinal web, the longitudinal web (4) of the key shank (1) has a fork-shaped profile, the fork legs (5, 5') of which are connected via a common narrow fork neck (5'') to the round indented region (2) of the key shank and possess between their free ends a fork groove (5'''), through which is to pass a corresponding keyway profile projection (12''') of the cylinder plug (9). The associated lock cylinder possesses, in its plug (9), a correspondingly profiled keyway and at least one tumbler plate (14) which crosses the keyway in the region of its two keyway-slot legs and the keyway profile projection (12''') located between them and which is supported at the rear on a blocking pin (15) mounted resiliently in the lock-cylinder housing web (8''). <IMAGE>

Description

The invention relates to a key according to the preamble of claim 1 and a lockable with it, with a correspondingly profiled key channel containing all-round closed cylinder core and radially adjustable pin tumblers, especially profile lock cylinder, according to the preamble of claim 6, the key being one Key shaft made of solid material, which has a substantially circularly profiled, massive incision area provided with notches for the pin tumblers, and a radially projecting longitudinal web for guiding and driving.

Keys and matching locking cylinders of the above type are known from the Australian patent AU-B-485 117 (application no. 69 965 174) and the German patent 817 409. The substantially circularly profiled massive incision area available with these cylinder keys allows numerous notches to be incorporated in the longitudinal and circumferential directions for the pin tumblers accommodated in the corresponding key channel and the cylinder housing surrounding the latter, whereas the longitudinal web on the key shaft in the Interaction with the existing longitudinal channel groove on the cylinder core, on its circular cylindrical key channel area, ensures the proper guidance of the key and also sufficient rotational driving between the key and the cylinder core. In contrast to the locking cylinders equipped with a key channel opening into the core circumference, such as after DE 4 000 179 A1 ensures, by the radially correspondingly shorter dimensioning of the longitudinal channel groove and the key longitudinal web which fits into it, that not too great torques can occur between the cylinder core and the insert part, for example when an unauthorized insertion of a raw key-like foreign body for shearing off the tumbler elements and thus could break the cylinder core. In the known generic keys, the longitudinal web used for guiding and driving is designed as a simple or also slightly profiled longitudinal rib, which optionally also runs slightly helically and can be provided with additional incisions for controlling further tumblers. However, this still does not provide adequate security against unauthorized opening of the cylinder lock, because these keys can be replaced in a relatively simple manner by pseudo raw keys. For this purpose, for example, a round rod adapted to the diameter of the circular-cylindrical part of the key channel of such locking cylinders would be sufficient, which would be provided with a chamfer at its tip and in which two pins, for example spiral spring pins, would be inserted, one pin for transmitting the torque and the other pin serve to stop on the end face of the cylinder core and thus could determine the axial insertion position of the pseudo key.

The invention is based on the object of improving a key and a locking cylinder of the type mentioned at the outset in such a way that, while maintaining the essentially circular-cylindrical cross section of the key shaft and key channel and thereby making it possible to accommodate numerous pin tumblers, their misuse by corresponding pseudo- Raw keys significantly more difficult and at the same time the stability of the keys in their longitudinal web area is significantly increased.

This object is achieved on the basis of a key of the generic type according to the invention in that the longitudinal web of the key shaft has a fork-shaped profile, the fork legs of which have a common, narrow Fork neck are connected to the round incision area of the key shaft and have between their free ends a fork channel to be passed through by a corresponding key channel profile projection of the cylinder core. The fork-shaped profiled longitudinal web preferably has a Y-shaped profile, the support leg of which corresponds to the fork neck and the expansion leg of which correspond to the two fork legs which run obliquely to one another.

It is characteristic of a key obtained in this way that it can act with its two fork legs belonging to the fork-shaped longitudinal web jointly on a tumbler element housed in the lock cylinder core and must also act for its proper transfer into its core release position. This significantly increases the security of the appropriately designed locking cylinder against improper unlocking, for example by means of imitated pseudo keys. Since the two fork legs are connected to the solid, essentially circularly profiled incision area of the key shaft only via their comparatively narrow fork neck, the possibility of accommodating numerous notches in the incision area is not thereby reduced. Furthermore, the moment of resistance of the key is considerably increased by the fork, in particular Y-shaped profiling of the key longitudinal web, so that the key is also more stable against twisting or bending.

From FR-PS 512 631, a key is known for locking cylinders with a key channel freely opening outward into the core circumference, which can be different in its shaft area adjoining the flat-shaped, flat-walled key back, including a Y-shaped profile. However, this key is foreign to the genre, especially since its Y-shaped profiled shaft area has the key incisions in the form of notch incisions sitting on the individual web or rib ends of the Y profile, while the key back adjoining the Y profile area is free of key incisions.

It has proven to be particularly advantageous in the key obtained according to the invention if the width of the fork neck is approximately one third of the diameter of the round incision area of the key, whereas the height of the fork neck is smaller and approximately equal to the thickness of the fork legs, the depth of the fork groove and the Distance between the outer surfaces of the fork legs inclined like a roof at an angle of about 60 ° and the inclined plane running parallel to them and through the center of the incision area.

According to a further feature of the invention, the key can also be provided at the level of its fork groove with one or more bores penetrating the key shaft diametrically and with limitedly adjustable stylus pins which, in themselves, e.g. are known from EP 0 154 755, and have additional notches for further pin tumblers at the bore ends opposite the fork groove, the maximum length of the stylus pins being no greater than the height extension of the key shaft less the depth of the fork groove. This creates additional locking options while at the same time further increasing security against improper use of keys and the corresponding locking cylinder.

The lock cylinder to be properly actuated by the key according to the invention is conventionally provided with a profile cylinder housing and a cylinder core which is rotatably mounted in its circular cylindrical area and can be locked by means of radially adjustable pin tumblers for guiding and turning the key. Proceeding from this, according to a further aspect of the invention, the cylinder core in the longitudinal groove region of its key channel has a fork, in particular a Y-shaped profile, which is forked in accordance with the longitudinal web of the key, with a profile projection protruding between the two channel groove legs formed in this way, at least one further extending in a transverse one segment-shaped Circumferential recess of the cylinder core radially adjustable, the two channel groove legs and the intervening profile projection of the key channel crossing tumbler plate is provided, which is supported with its core rounded to the rear on a spring-loaded locking pin mounted in the cylinder housing web and which due to its radial adjustment a locking of the Cylinder core. This tumbler plate, which therefore crosses both channel groove legs and the intermediate profile projection of the key channel, must be acted upon by both fork legs of the appropriate key for its correct adjustment to its core release position. Misuse by a key that is identical in terms of its incision area, but only provided with a simple, radially short longitudinal web, is therefore not possible, nor is it possible with the help of a key, the fork leg of which would be ground down, because this would result in a cantilever-like tilting of the key Locking plate could come, especially if the latter is provided on the underside with a support lug over which it is supported on its locking pin in the manner of a balance bar.

The tumbler plate is advantageously profiled in a U-shape on its upper side facing the key channel, with its projecting ends on both sides of the upper middle section crossing the two channel groove legs and the profile projection lying therebetween projecting into the displacement path of adjacent tumbler elements in the locked position of the tumbler plate and thus allowing them to be blocked.

For cylinder keys provided with a stylus of the type described above, the tumbler plate is provided in the middle of its upper middle part crossing the two channel groove legs with a tactile nose which can be acted upon by the stylus of the key and which lies profile-wise within the key channel profile projection, with the diagonally opposite side then also in the cylinder housing and cylinder core, another protruding into the key channel Pin tumbler is provided for the control of the stylus.

Instead of a tumbler plate, a similarly shaped profile plate can be provided in a segment-shaped core circumferential recess, which is provided on the inside of its projecting ends with profile projections to be varied, the profile grooves of which on the outside in the area of the two fork legs of the key to be correspondingly incorporated, to be varied can be provided.

Furthermore, the tumbler plates can also have a cylindrical middle part provided with wing attachments on both sides, which is provided on its upper side facing the key channel with a run-on slope for the key stylus.

If the pin tumblers in the core and cylinder housings are arranged axially offset from one another, for example helically, the tumbler plates and the circumferential recesses provided on the cylinder core and receiving them can also be designed correspondingly obliquely.

Fig.1 und 2

eine erste Ausführungsform eines Schlüssels im Querschnitt seines Schafts und in der Seitenansicht,

Fig.3

einen mit einem oder mehreren Taststiften versehenen Schlüssel in der Seitenansicht,

Fig.4 und 5

den Querschnitt durch einen Profilschließzylinder bei abgezogenem bzw. eingestecktem Schlüssel der in den Fig.1 und 2 dargestellten Beschaffenheit,

Fig.6

den gleichen Schließzylinder im Querschnitt bei eingestecktem falschem Rohschlüssel,

Fig.7

einen Schnitt durch einen Schließzylinder mit abweichend beschaffenem Zuhaltungsplättchen und einem eingesteckten Schlüssel von wiederum falscher Beschaffenheit,

Fig.8 und 9

Querschnitte durch einen Schließzylinder mit bzw. ohne eingestecktem, mit Taststift versehenem Schlüssel,

Fig.10

einen Schnitt durch einen den Fig.8 und 9 entsprechenden Profilschließzylinder bei eingestecktem, ohne Taststift versehenem Schlüssel, und

Fig.11

einen Schnitt nach der Linie XI-XI der

Fig.12,

die eine quergeschnittene Draufsicht auf einen mit unterschiedlich beschaffenen Plättchen, nämlich einem Profil- und einem Zuhaltungsplättchen, versehenen Teilbereich eines Schließzylinders wiedergibt.

The drawing shows several exemplary embodiments of keys designed according to the invention and associated profile locking cylinders. Show

Fig. 1 and 2

a first embodiment of a key in cross section of its shaft and in side view,

Fig. 3

a side view of a key provided with one or more styli,

Fig. 4 and 5

the cross section through a profile lock cylinder with the key removed and inserted, of the nature shown in FIGS. 1 and 2,

Fig. 6

the same locking cylinder in cross-section with the wrong raw key inserted,

Fig. 7

a section through a locking cylinder with deviating procured tumbler plate and an inserted key of wrong quality,

Fig. 8 and 9

Cross-sections through a locking cylinder with or without a key inserted with a stylus,

Fig. 10

a section through a profile lock cylinder corresponding to FIGS. 8 and 9 when the key is inserted without a stylus, and

Fig. 11

a section along the line XI-XI the

Fig.12,

which reproduces a cross-sectional plan view of a portion of a locking cylinder provided with differently made plates, namely a profile plate and a tumbler plate.

The lock cylinder key shown in FIGS. 1 and 2 has a key shaft 1 made of solid material, which has a substantially circularly profiled massive incision area 2, on the circumference of which is offset both in the longitudinal and in the circumferential direction, numerous notches 3 for the actuation of in associated locking cylinder located, radially adjustable pin tumblers are incorporated. The circular-cylindrical incision area 2 is laterally adjoined in the shaft area of the key, the longitudinal web generally designated 4. This longitudinal web 4 has a fork-shaped, in particular Y-shaped profile, the fork legs 5,5 'of which are connected to the round incision area 2 of the key shaft via a common narrow fork neck 5' '. Between its free ends of the fork legs 5, 5 'there is provided a fork groove 5' '' to be passed through by a corresponding key channel profile projection of the cylinder core. The main leg of the Y-shaped profile of this key longitudinal web 4 corresponds to the fork neck 5 ″, while the spreading legs of the Y profile correspond to the two fork legs 5.5 ′ that run obliquely to one another.

The key shown in FIG. 1 in a supernatural size is preferably designed in its shaft area in such a way that that the width B of the fork neck 5 '' is approximately one third of the diameter D of the round incision area 2, whereas the height H of the fork neck 5 '' is smaller and approximately equal to the thickness d of the fork legs 5.5 ', the depth T of the fork groove 5 '''and the distance A between the outer surfaces of the fork legs 5,5' inclined towards each other at an angle α of approximately 60 ° and the inclined plane E running to them and through the center of the incision area 2.

The locking cylinder key shown in FIG. 3 substantially matches the profile of the key shaft 1 'described above. It differs from this, however, in that it is provided at the level of its fork groove 5 '' 'with one or more holes 6 diametrically penetrating the key shaft 1' and therein there are adjustable adjustable stylus pins 7, and additional holes at its opposite ends of the fork groove 5 '' ' Has notches 3 'for further pin tumblers. The maximum length of the stylus (s) 7 is not greater than the height S of the key shaft 1 or 1 'reduced by the depth T of the fork groove 5' '' (see FIG. 1).

The locking cylinder shown in FIGS. 4 and 5, which fits the key according to FIGS. 1 and 2, has in a conventional manner a profile cylinder housing 8 and a cylinder core 9 which is rotatably mounted in its circular cylindrical region 8 'and which is generally designated 10 by means of radially adjustable Pin tumblers can be blocked. The cylinder core 9 is closed all around and has an axis-centered key channel 11 of essentially circular cross-section with a channel longitudinal groove adjoining it laterally, generally designated 12, for guiding and driving the key.

According to the invention, the key channel 11 has in its longitudinal groove area 12 a fork, in particular Y-shaped, corresponding to the longitudinal web 4 of the key shown in FIGS. 1 and 2, that is to say two channel groove legs 12 ', 12''and a profile projection 12' projecting between them. owns. Furthermore, the cylinder core with a transverse, Provided segment-shaped circumferential recess 13, in the radially adjustable a tumbler plate 14 is provided which crosses the two channel groove legs 12 ', 12''and the profile projection 12'''. This is supported with its rounded rear side corresponding to the core circumference 9 'on a locking pin 15 which is mounted in the cylinder housing web 8''in a corresponding bore 8''' and is under the action of the spring 16.

The tumbler plate 14 is profiled in a U-shape on its top side facing the key channel 11, its projecting ends 14 'lying on both sides of the top middle part 14' crossing the two channel groove legs 12 ', 12' 'and the profile projection 12' '' 'protrude into the shifting path of adjacent tumbler elements 10' or 10 '' in the engaged locking position of the tumbler plate 14 shown in FIG. 4 and are therefore able to block them.

As shown in FIG. 5, the tumbler plate 14 is moved by inserting the appropriate key 1 through its two spread fork legs 5, 5 'into the illustrated release position, which releases the cylinder core 9, while at the same time pressing the locking pin 15 back accordingly suitably arranged notches 3, the pin tumblers 10 have been radially adjusted so that they also release the cylinder core 9 for its rotary adjustment movement with their paired tumbler pins 10 ''', 10 ^IV .

The sectional locking cylinder shown in FIG. 6 corresponds in all details to the one described above. Here, however, instead of the appropriate key, that is to say provided with a Y-shaped profiled longitudinal web, a wrong key 1 ″, namely with a shortened simple longitudinal web 4 ′, is inserted into the key channel of the cylinder core. As a result, the tumbler plate 14 cannot be moved into its release position according to FIG. 5. Rather, it remains under the action of the locking pin 15 in its illustrated locking position in which it is at the same time the neighboring tumblers 10 'and 10''are still blocked.

The profile locking cylinder shown in section in Figure 7 differs from the ones described above only in the slightly different nature of its tumbler plate 14 '''. In this case, it is provided on the underside with a support lug 14 ^IV , by means of which it is supported on its locking pin 15 in the manner of a balance beam. The key 1 '''introduced here has a solid circular cylindrical cross section corresponding to the keys obtained above, but differs from this in that it only has one fork leg 5' in its longitudinal web region, the other fork leg 5 is therefore missing. As shown in FIG. 7, in this case the tumbler plate 14 '' is also still acted upon by the remaining fork leg 5 ', but is tilted in the manner shown, in which it at least also lock pin 15 with its support nose 14''' is able to partially push back into a possible release position, but not the adjacent pin tumbler 10 ', since it still protrudes with its projecting end 14''in its sliding path and thereby blocks it.

The sectional locking cylinder shown in FIGS. 8 and 9 is essentially of the above-described nature, that is to say also provided with a plurality of radially adjustable tumblers 10 and a correspondingly profiled key channel 11 with two channel groove legs 12 ', 12''forming the longitudinal channel groove. In addition, however, this locking cylinder, since it is intended for a key provided with a stylus 7 according to FIG. 3, also has a further radially adjustable pin tumbler 10 ^V for controlling the stylus 7 in the key shaft 1 'and a correspondingly modified tumbler plate 14 ^V. Mistake. This is because, in the middle of its top middle part, which crosses the two channel groove legs 12 ', 12'', a sensing lug 14 ^VI which can be acted upon by the stylus 7 of the key 1' and which lies in profile within the key channel profile projection 12 '''. In this case, the tumbler plate 14 ^{V is} not by the fork legs 5.5 'of the key, but pressed by its stylus 7 in the release position shown in Figure 8, the stylus 7 has been moved by the tumbler 10 ^V and the spring 17 dimensioned stronger than the spring 16 belonging to the locking pin 15 into its lower release position in the key 1 '. The adjustability of the stylus 7 in the shaft 1 'of the key is limited by beads 18 provided in the fork leg neck 5''which protrude into the displacement path of the stylus 7 in the region of its neck 7'. It goes without saying that a plurality of corresponding tumbler pins 14 of different length can also be provided, to which corresponding tumbler pins 10 ^{V of} different lengths could be assigned. 9 shows the locking cylinder of FIG. 8 with the key removed, that is to say in the blocking position of its cylinder core 9.

10 shows a profile locking cylinder of the nature shown in FIGS. 8 and 9, but when inserting a key 1 that is not suitable in this case because it is provided without a stylus 7. Both of its fork legs 5, 5 'are here because of the greater recess on the upper side Tumbler plate 14 ^{V is} unable to move the latter into its release position.

As shown in FIGS. 11 and 12, instead of a tumbler plate 14, a profile plate 19 can also be provided, which is provided on the inside of its ends 19 'projecting on the top side with profile projections 19''to be varied, in which case in the area of the two fork legs 5, 5 'of the key corresponding profile grooves can be incorporated, so that by creating differently profiled tumbler plates in a technically simple manner, corresponding profile differences can also be realized, for example for locking systems. Furthermore, FIG. 12 shows that in the case of pin tumblers 10 which are axially offset from one another, for example in a helical arrangement, the tumbler plate 14 ^V or the profiled plate 19 and the circumferential recesses 13 which are provided on the cylinder core 9 and which receive them can be designed correspondingly obliquely. FIG. 12 also shows that the tumbler plate 14 ^V here has a wing attachment on both sides 14 ^VII provided cylindrical middle part 14 ^VIII , which can be provided on its upper side facing the key channel 11 with opposing run-up slopes 14 ^IX for the key stylus 7. If the wing attachments 14 ^VII lie at right angles to the cylindrical central part 14 ^VIII , that is to say protrude radially from them, two profile differences can be achieved by turning the tumbler plates 14 through 180 ° with each of them.

It goes without saying that various modifications are possible within the scope of the present claims. In particular, a plurality of axially successive tumbler plates 14 can be provided in the locking cylinder, which can be displaced into the release position by the fork legs 5, 5 'of the matching locking cylinder. A plurality of stylus pins 7 can also be provided in the key shaft 1 'and in the lock cylinder a plurality of additional pin tumblers 17 correspondingly to be assigned for the control of the stylus pins and their own control by the stylus pins.

Claims (12)

1. A key for a locking cylinder, in particular a profile locking cylinder, provided with an enclosed cylinder core containing a correspondingly profiled key channel, and with radially adjustable pin tumblers, having a key shaft (1) consisting of solid material, which comprises a substantially circular profiled solid indented region (2) provided with indentations (3) worked on its surface for the pin tumblers (10), as well as a radially projecting longitudinal cross piece (4) for guidance and rotational entrainment, characterised in that the longitudinal cross piece (4) of the key shaft (1) has a fork-like profile, the limbs of which fork (5, 5') are connected to the round indented region (2) of the key shaft by means of a common, narrow fork neck (5'') and between their free ends comprise a fork trough (5''') through which a corresponding key channel profile projection (12''') of the cylinder core (9) passes.
2. A key according to claim 1, characterised in that its fork-like profiled longitudinal cross piece (4) has a y-shaped profile of which the upright limb corresponds to the fork neck (5'') and of which the inclined limbs correspond to the two fork limbs (5, 5') which extend correspondingly inclined towards each other.
3. A key according to claim 2, characterised in that the width (B) of the fork neck (5'') amounts to approximately one third of the diameter (D) of the round indented region (2), in contrast, the height (H) of the fork neck (5'') is smaller and approximately equal to the thickness (d) of the fork limbs (5, 5'), to the depth (T) of the fork trough (5''') and to the distance (A) between the roof-like outer surfaces of the fork limbs, which are inclined towards each other at an angle (α) of approximately 60°, and the inclined plane (E) extending parallel to the said outer surfaces and through the centre of the indented region (2).
4. A key according to claim 2 or 3, characterised in that at the level of its fork trough (5''') it is provided with one or a plurality of bores (6) diametrically penetrating the key shaft (2) and with tracer pins (7) mounted therein in a limited adjustable manner, and comprises, at the ends of the bores lying opposite the fork trough (5'''), additional indentations (3') for further pin tumblers (10^V), wherein the maximum length of the tracer pins (7) is not greater than the height extension (S) of the key shaft (2) reduced by the depth (T) of the fork trough (5''').
5. A key according to one of claims 1 to 4, characterised in that in the region of its two fork limbs (5, 5') on the outsides thereof variable profile grooves are provided.
6. A locking cylinder for keys according to one of claims 1 to 5, having a profile cylinder housing (8) and an enclosed cylinder core (9) which is mounted in a rotationally adjustable manner in the round cylindrical region (8') of the said housing and which can be blocked by means of radially adjustable pin tumblers, which cylinder core has a key channel (11) which extends in the middle of its axis and is of a substantially circular cross-section with a channel longitudinal groove (12) laterally adjoining the round cross-section for guiding and rotationally entraining the key, characterised in that the cylinder core (9) in the longitudinal groove region (12) of its key channel (11) comprises a forked, in particular y-shaped profile corresponding to the longitudinal cross piece (4) of the key, which profile has a profile projection (12''') protruding between the two similarly-formed channel groove limbs (12', 12'') of the profile, and furthermore at least one tumbler plate (14) is provided which is mounted in a radially adjustable manner in a transversely extending segment-shaped peripheral recess (13) of the cylinder core (9) and traverses the two channel groove limbs (12', 12'') and the profile projection (12''') of the key channel (11) lying between them, which tumbler plate is supported, with its under side, which is rounded correspondingly to the core surface, at a locking pin (15) which is mounted in a cylinder housing cross piece (8'') and is under the effect of a spring, and which tumbler plate, as a result of its radial adjustment, causes a locking of the cylinder core.
7. A locking cylinder according to claim 6, characterised in that the tumbler plate (14) has a U-shaped profile on its upper side facing the key channel (11), wherein its protruding ends (14''), lying at both sides of the upper side middle part (14') which traverses the two channel groove limbs (12', 12'') and the profile projection (12''') lying between them, protrude in the retracted locking position of the tumbler plate (14) into the displacement path of the neighbouring tumbler elements (10', 10'') and thereby block them.
8. A locking cylinder according to claim 7, for keys according to claim 4, characterised in that the tumbler plate (14^V) in the middle of its upper side middle part (14'), traversing the two channel groove limbs (12', 12''), comprises a tracer projection (14^VI) which can be stressed by the tracer pin (7) of the key (1) and which lies, so far as the profile is concerned, inside the key channel profile projection (12'''), and that furthermore on the diagonally opposite side in the cylinder housing (8') and cylinder core (9) a further pin tumbler (10^V) protruding into the key channel (11) is provided to steer the tracer pin (7).
9. A locking cylinder according to one of claims 6 to 8, characterised in that the tumbler plate (14''') is provided on its under side with a support projection (14^IV) by means of which it bears against its locking pin (15) in the manner of a balance beam.
10. A locking cylinder according to one of claims 6 to 9, characterised in that the tumbler plates (14) have a cylindrical middle part (14^VIII) provided with wing projections (14^VII) on both sides, which middle part is provided on its upper side facing the key channel (11) with a run-up slope (14^IX) for the key tracer pin (7).
11. A locking cylinder according to one of claims 6 to 10, characterised in that in the case of pin tumblers, which are disposed approximately in a spiral line and axially displaced to each other, the tumbler plates (14) and the peripheral recesses (13) provided at the cylinder core (9) to receive them are correspondingly formed in an inclined manner.
12. A locking cylinder according to claim 7, characterised in that in a segment shaped core-peripheral recess (13), instead of one of the tumbler plates (14), a similarly formed profile plate (19) is provided which is provided on the inner side of its end (19'), which projects from the upper side, with variable profile projections (19'').

Images