Abstract: A locking cylinder is proposed for installation in a lock, with a locking element for actuating a lock bolt or the like, and an actuating element, preferably a knob, wherein the actuating element is normally disengaged from the locking element, and with a coupling for connecting the locking element to the actuating element after receiving an identification code from an associated transponder. An electromechanical converter is associated with the actuating element, which converter converts an actuation of the actuating element into electrical energy which is used to support the wireless communication with the transponder and/or the engaging of the coupling when a valid identification signal is received.

Abstract: The locking device consists of a key (2) and a lock cylinder (1), with a cylinder core (5) which is rotatable in a casing (3) and has an axially extending channel (16) for insertion of a key (2) which passes through plate-shaped tumblers (7) arranged axially in succession so as to be displaceable in the cylinder core (5) and, with bit stages provided on the key shank (13), locates these tumblers (7) in a position releasing the rotation of the cylinder core (5). The locating displacement movement of the tumbler plates (7) is designed as a rotational movement around the axis of the key shank (13), and its range is preferably limited by stops (21, 22).

Abstract: The lock cylinder with an external housing accommodates, on its rear face, a closure element acting upon a mortise lock or the like and with an exchangeably inserted core unit the casing of which contains housing pins as tumblers and a cylinder core equipped with a key channel, said cylinder core also receiving core pins as tumblers and being connected merely in a plug-in manner to coupling pins which issue from said closure element and project freely into a socket in said external housing serving for insertion of said core unit, wherein engagement of said coupling pins extends only over a rear region, which is free from key channels, of said cylinder core.

Abstract: The invention provides a lock with a forward and reverse action bolt element and a lock cylinder which precedes the operating region of the bolt element into which the force for shifting the bolt element is to be introduced. The lock comprises an arresting element which can be fused at least locally by the effect of heat on the lock cylinder and which, after fusion, arrests the bolt element against reverse lock actuation.In an alternative embodiment, the lock may comprise a coupling between the operating region and a lock-actuating element spatially separated from it and protected by the lock cylinder, which coupling can be broken by fusion due to the effect of heat on the lock cylinder.

Abstract: A lock cylinder suitable for mortise locks comprises mechanically operating tumbler pins controlled by a key and at least one electromagnetic tumbler. The cylinder is arranged in a cylinder casing and comprises a coil as well as a locking member which can be displaced by electromagnetic forces for an additional tumbler pin which is spring-loaded in the locking direction and with a reading device which detects a key code. The locking member is pivotally mounted in a recess in the additional tumbler pin and enters the locking position in front of a stop on the cylinder casing.

Abstract: A locking device comprises a lock cylinder and a reversible flat key having indentations located on opposite broad faces of the key for the arrangement of tumbler pins, and having a rib associated with each row of indentations, into the sectional area of which at least one of the pins extends and the crest of which rib projects beyond the broad face of the key. The deepest reached indentation lies nearest to the crest of the rib and several indentations of a row of indentations are integrated into a through groove of variable depth levels.

Abstract: A cylinder-operable key switch 5 comprises a cylinder housing 1 and a cylinder core 7 mounted rotatably therein, which acts upon an electrical switching device 3. The switching device 3 is located at one side of and adjacent to the cylinder core 7 which operates the switching device 3 by rotation of a control member 18.The key switch is particularly suitable for fitting to electronic equipment, where it provides a high insulation against flash-over voltage.

Abstract: The device comprises a sleeve (10,10') which serves to cover the polygonal head (4) of a wheel nut or bolt. The sleeve supports a lock cylinder (18) from which a locking member (28,36) projects for co-operating with a radial shoulder (6,6') formed in the head (4). The locking member (28,36) is retracted by means of a key (24) rotating the cylinder plug (20,20'). The sleeve (10,10') can be pushed on to the head (4) without using the key (24). The locking member (28,36) may be constituted by a latch (28) or annular spring (36).

Abstract: A device for protecting motor-vehicles against theft comprising a freely rotatable sleeve covering the polygonal head of a wheel nut or screw, into which sleeve a cylinder lock engages rotatably, which lock is provided with at least one tumbler entering the inner wall of a cylinder lock location cavity of said polygonal head which projects beyond the circumference of said cylinder lock. In the locking position, said tumbler engages behind a cooperating locking shoulder which is located on an annular body inserted into an axial chamber of said polygonal head and locked in position thereto.

Abstract: For increased security the key (2; 40; 44) has one or more blade portions (43; 45; 46; 5, 6). The longitudinal central plane (A, B) of the or each blade portion is offset from the guide region (42; 7) running along the back edge of the key shaft (3). Furthermore, the or each blade portion is connected to the guide region by means of a bridging portion (14, 14') which forms an obtuse angle (alpha) with the guide region, as well as forming an obtuse angle with the blade portion. In one preferred embodiment two blade portions (45, 46; 5, 6) are provided; they may be of the same cross-sectional shape (FIG. 2) or symmetrical (FIG. 11). The blade portions and guide region may be divided into two portions to provide partner keys (FIG. 12).

Abstract: A switching device to be operated by means of a cylinder lock, comprising a switching element mounted for rotation on the core of the cylinder lock. Said switching element is adapted to move a spring-loaded contact pin from its operating position in contact with the actuating surface of an electrical switch and to lock it against returning to said operating position.

Abstract: Anti-theft device for nuts/screws of automobile wheels, comprising a barrel (10) rotatably subassembled with a lock cylinder plug (18) the tumblers (24) of which are placed in position by simple insertion of the key (23), which key, however, once inserted and turned, cannot be withdrawn inasmuch as a projection (28) on the key (23) then lies behind a shoulder (20) on the barrel. This subassembly may be rotatably locked upon the fastener element or removed therefrom using but one hand.

Abstract: The invention relates to a cylinder-lock having a flat key comprising a shank having at least one profile longitudinal groove extending from the end thereof to accommodate a rib in the key-channel of the cylinder-lock, said shank including fixed key bits adapted to index pin-tumblers in the cylinder-lock, said key including in the area of the wide side of the shank an additional movable key bit, said movable key bit being adapted to be controlled by a shoulder in the key-channel such that when the key is inserted it induces an auxiliary tumbler into a position which allows the cylinder core of the lock to be rotated.

Abstract: A lock cylinder with a rotatable cylinder core, which cylinder core has the key channel and is rotatable up to fixed abutment positions, the cylinder core being provided with tumbler core pins to which there are coordinated housing pins, the latter being arranged in bores of the cylinder housing. The rotation abutment of the cylinder core is formed by a core pin which is controllable by means of the key, the core pin entering into a slot open in the direction of the core. The base surface of the slot comprises several partial sections which are arranged at different radial distances, each partial section respectively being off-set step-like with respect to each other.

Abstract: An electric switching device on a rotary cylinder lock, particularly for gasoline pumps, with core pins which are controlled by the key, the stroke of the core pins bringing contact lugs in contact position to counter-contact surfaces. The core pin acts on a transmission lever, the free end of which lever, which end forms the contact lug, slides over a row of adjacent contact surfaces.

Abstract: A reversible flat key for cylinder locks having recesses arranged in opposite wide faces of the key for arranging the tumbler pins in the proper position and having lead-in bevels in the region of the tip of the key, which lead-in bevels lie in alignment with the respective row of recesses and each of which runs down obliquely into the respective opposite wide face of the key. Each lead-in bevel runs out into the rear face of the rib projecting up above the wide face of the key and carrying the recesses and at least one recess has a greater depth than the height of the rib.

Abstract: A reversible flat key for cylinder locks, having lead-in bevels at the tip of the key, and with double rows of recesses for arranging the tumbler pins in proper order, arranged on each wide side of the key, wherein the double row of recesses on one wide side of the key is arranged offset in the transverse direction relative to the double row of recesses on the opposite wide side of the key, and the lead-in bevels are arranged off set relative to one another, the bevels being formed respectively as individual grooves extending over the longitudinal center plane of the key.