Abstract: An improved locking device comprising a lock body, a locking plug, and a plurality of tumblers, wherein the tumblers are restricted from moving with respect to the locking plug during the time frame that the locking plug is rotated with respect to the lock body.

Abstract: A substantially flat key blade extends from a grip portion along a longitudinal axis and includes a connecting portion adjoining to the grip portion, a major longitudinal bitting portion provided with a row of coded cuts, and a free tip portion. The connecting portion of the key blade is provided with a first selectable abutment surface facing in the forward direction. The first abutment surface is formed as a forward end surface of a longitudinal rib portion located at a lateral side of the upper relatively narrow part of the key blade at a vertical level lying within a vertical range of the bitting portion of the key blade and extending in parallel to the longitudinal axis of the key blade and being confined longitudinally to the connecting portion of the key blade and confined also within the contour of or slightly laterally outside a rectangle of the key blank.

Abstract: A lock and key mechanism reduces exposure to lock picking by including an extension into a key slot to receive and conceal tapered end portions of key pins. The only portions of key pins exposed in a key slot are cylindrical portions that are difficult to move from a resting position. A key includes a beveled leading edge and a spring-loaded pin activation element at the leading edge of the key. As the key is inserted into the key slot, the spring-loaded pin activation element is compressed to permit entry into the key slot. As the pin activation element reaches a pin, an aperture in the extension allows the spring-loaded pin activation element to move toward the key pin and move the key pin from its resting position. In this activated position, the tapered end portion of the key pin is exposed for further activation by the beveled leading edge of the key. The process is repeated until the pin activation element engages and activates each successive key pin and allows full insertion of the key.

Abstract: A substantially burglary-proof lock, comprises a housing formed with a cylindrical bore defining an inner cylindrical surface, and a cylinder within said bore carrying locking elements movable to locking and unlocking positions with respect to said housing, said cylinder having an outer diameter equal to the diameter of said bore so as to be rotatable when the locking elements are in unlocking position with respect to said housing, said cylinder being formed with a keyway for receiving a proper key in order to move said locking elements to their locking and unlocking positions with respect to said housing, characterized in that said cylinder carries at least one insert of a hard material configured, dimensioned and located such as to prevent pull-out of the cylinder from the housing by a pull-out force applied to the cylinder, and/or by drilling through the locking elements.

Abstract: A lock system includes keys, key blanks, keyways, and lock cylinders, and the keys or key blanks have opposite sides formed with grooves for cooperating with a conforming keyway. More particularly, the sides of the key or key blank have a portion grooved for registration, another portion grooved for top-level hierarchical master keying, and two other portions, one on each side of the blade, for further master key variations and different combinations. One of the two further sections being curvilinear and the other rectangular or angular cuts. The conforming keyway of the lock includes ridges and grooves corresponding to the grooves and ridges, respectively, of the key or key blank. Instruments other than keys or key blanks may be used to enter the grooves and ridges of the keyway to operate the lock without the use of a precisely configured key.

Abstract: A lock system includes keys, key blanks, keyways, and lock cylinders, and the keys or key blanks have opposite sides formed with grooves for cooperating with a conforming keyway. More particularly, the sides of the key or key blank have a portion grooved for registration, another portion grooved for top-level hierarchical master keying, and two other portions, one on each side of the blade, for further master key variations and different combinations. One of the two further sections being curvilinear and the other rectangular or angular cuts. The conforming keyway of the lock includes ridges and grooves corresponding to the grooves and ridges, respectively, of the key or key blank. Instruments other than keys or key blanks may be used to enter the grooves and ridges of the keyway to operate the lock without the use of a precisely configured key.

Abstract: A key blank or key has a rectangular parallel metal shaped blade which has side edges formed with grooves for cooperating with a complementary shaped keyway; the sides of the blank having a portion grooved for registration, another portion grooved for top-level hierarchical master keying, and two other portions, one on each side of the blade, for further master key variations and different combinations. One of the two further sections being curvilinear and the other rectangular or angular cuts.

Abstract: A lock includes a body defining a first bore having a lock core mounted therein, and a second bore having an engaging element inserted thereinto; and a front barrier shield fixedly mounted in the body in front of the lock core. A communicating hole is formed in the body behind the lock core to communicate the two bores. A locking pin is disposed in the communicating hole to move into or out of a locking hole formed on the engaging element under control of the lock core, so as to lock or release the engaging element to or from the body, respectively. The front barrier shield includes a plurality of axially spaced and staggered barrier sheets to define a zigzag keyway, preventing a thief from peeping through the first bore and destructing the lock core.

Abstract: A bending sequence and bending die proposing apparatus for a sheet metal part, includes: means for storing a development drawing of the sheet metal part; means for detecting a plurality of bending sequence candidates capable of manufacturing the sheet metal part, and bending die candidates to be used in the respective bending steps in the respective bending sequence candidates, based on the development drawing; and means for displaying the plurality of bending sequence candidates. The display includes information representing the number of stages in the respective bending sequence candidates.

Abstract: A picklock-proof key slot for a lock device and a key thereof, which comprises a rotary cylinder and a lock casing, between which plural upper tumblers and lower tumblers are furnished; the center of the rotary cylinder is provided with a key slot; under lock up condition, the lower tumblers are pushed into the key slot; the center of the tumbler groove is furnished with a salient plate, of which both sides are furnished with symmetrical guide slots; a guide slot is furnished between the two symmetrical guide plates on the key plate; a plurality of unlock-tumbler holes is furnished on the guide slot between the two guide plates; the hole has a curved surface to fit with the curve surfaces on both sides of the lower tumbler so as to reduce the pushing-up space of the lower tumbler, and also to reduce the possibility of unlocking the lock device with a master key to push the lower tumbler.

Abstract: A lock has a flat key having a flat blade extending along a key axis and having an axially extending edge formed to each side of a central axially extending key plane with a pair of axially extending inner edge surfaces flanking the key plane and each formed with a plurality of bits offset transversely at different spacings from the key axis. The bits on one side of the key plane are offset axially to the bits on the other side of the key plane as described above. A barrel having an inner surface centered on a lock axis holds a plug rotatable about the lock axis in the barrel, bisected by a plug plane including the lock axis, and formed with an axially extending and open key hole adapted to receive the key with the axes coaxial and the planes coplanar. A respective set of axially spaced tumblers is dis-placeable in the plug to each side of the plug plane parallel to the plug plane. The tumblers of one of the sets engage the key in the hole at locations offset axially from the tumblers of the other set.

Abstract: A cylinder lock and key combination, wherein the lock comprises a side profile ridge (60) disposed in the key slot (53) and having a relatively shallow recess (61), in which a projection (55) on a side tumbler (54) is vertically movable, and a continuously extending edge portion (62). The key has a relatively shallow coded groove (17), which cooperates with the side tumbler projections (55) of the lock, and a rectilinear, deeper profile groove (16), into which the edge portion (62) of the side profile ridge fits. This unitary edge portion secures a good guidance of the key when the latter is inserted into the lock.

Abstract: A high security lock employs a key plug rotatably mounted within a lock housing. Restraining means selectively prevents relative motion between the key plug and lock housing. The key plug is operatively linked to a latch operating bar. The latch operating bar controls the position of a securing latch. A bracing means prevents access to the latch operating bar.

Abstract: A cylinder lock and key combination, wherein the lock comprises a side profile ridge (60) disposed in the key slot (53) and having a relatively shallow recess (61), in which a projection (55) on a side tumbler (54) is vertically movable, and a continuously extending edge portion (62). The key has a relatively shallow coded groove (17), which cooperates with the side tumbler projections (55) of the lock, and a rectilinear, deeper profile groove (16), into which the edge portion (62) of the side profile ridge fits. This unitary edge portion secures a good guidance of the key when the latter is inserted into the lock.

Abstract: A lock with changeable warding positions wherein a rotationally indexable warding member selectively enables one of a multiple of keys for operation of the lock.

Abstract: A cylinder lock and key combination, where the key (20) has an undercut profile groove (24) at one side surface (22) thereof and, in the key slot (13), the lock key plug has a corresponding profile tongue (15) with a downwardly projecting end portion (15a), which fills up the undercut portion (29) of the key profile groove (24) upon insertion of the key into the lock.

Abstract: A cylinder lock/key combination includes a lock cylinder (2), a plug (3) rotatably mounted in the cylinder (2) and having a key slot (4), and a number of tumbler pins (6) that are activatable by the code (5a) on the key (5). The key slot carries or houses an element (7) which extends axially along a substantial part of the slot. The key (5) has a blade part (5c) which includes an axially extending portion (5d) in which there is provided a hole (8) for receiving the slot-carried element (7) as the key is inserted into the lock. The slot-carried element (7) and the hole (8) provided in the key (5) are located eccentrically in relation to the center of the plug (3) and accompany rotation of the plug while aided by the key (5). The profile shape of the slot-carried element (7) and the hole (8) in the key may vary within wide limits. The invention also relates to a key belonging to a combination of the aforementioned kind, and to a key blank from which such a key can be produced.

Abstract: A cylinder lock and key combination, where the key (20) has an undercut profile groove (24) at one side surface (22) thereof and, in the key slot (13), the lock key plug has a corresponding profile tongue (15) with a downwardly projecting end portion (15a), which fills up the undercut portion (29) of the key profile groove (24) upon insertion of the key into the lock.

Abstract: A communications system is disclosed for switching connected communications terminal devices includes a central module including a processor-controlled base unit and a supplementary unit as well as at least one peripheral subscriber module and up to four subscriber transmission units. The peripheral subscriber modules and the subscriber transmission units allow the connection of communications terminal devices or, alternatively, the connection to public communications networks is possible. A switching element implemented in the base unit supports an ISDN-oriented interface to which up to four particularly low-cost subscriber transmission units may be connected. A small or mid-sized communications system having a modular construction can thereby be designed in such a fashion as to be expandable at the lowest expense while allowing flexibility of configuration.

Abstract: The lock cylinder comprises a cylinder body wherein a cylinder plug (1) comprising a slot (2) for the key (18) of the lock is rotatable arranged. The profile of the key slot and therefore also of the key is determined by profile forming elements in the form of rotation bodies (6,7) which are inserted in bores (4,5) extending through the cylinder plug (1) parallel to and adjacent to the middle plane (10) of the key slot (2). The profile elements (6,7) may be made of hardenable steel, for instance by turning, and may comprise a number of portions of different diameters so that the total number of key profiles obtainable becomes high while permitting the key profile to be made very thin and correspondingly difficult to copy.

Abstract: A cylinder lock is capable of providing a changeable keyway by means of elongated warding members which are insertable into a keyway access slot which has a cross-sectional configuration larger than for a desired key. There may be one or more warding members which are insertable into the plug and extend the length of the keyway access lot to define the cross-sectional area of a desired key.

Abstract: An automobile ignition lock cover for steering column-mounted ignition locks includes a hollow cover housing having an open side to fit over the ignition lock. An L-shaped bracket has a first portion disposed inside the housing and fixed to the back wall of the housing. It also has a second, outside bracket portion that extends out through a slot in the lower portion of the cover. A chain is attached to the upper end of the cover. The free end of the chain is attached to the U-shaped shackle of an adjustable shackle lock assembly. The chain wraps around the steering column, and the shackle legs are inserted through one or a pair of holes in the outside bracket portion and locked snugly in place in the lock housing, which bears against the opposite side of the bracket or is attached thereto. The L-portion of the bracket is disposed inside the cover and extends forward under the ignition lock, to prevent the cover from being rotated.

Abstract: A key is an assembly of a thermoplastic handle and a blade, which are formed separately from each other. The blade is substantially flat, and includes on each of its opposite sides a plurality of parallel longitudinal lands having forwardly-facing bittings thereon, and a plurality of parallel longitudinal grooves which alternate with the lands and space them apart. The bittings serve to engage transverse rows of axially reciprocatable tumblers in a cylinder lock, and the grooves receive lock wards therein, while the distal end of the blade engages the lock to determine the depth of insertion of the key blade. The blade also is provided with a capture pin opening, and with a proximal end structure which cooperates with the handle in assembling the key. The blade is made from a length of bar stock which is rolled in order to form lands and grooves on the sides of a flat strip.

Abstract: A cylinder lock with key, incorporating a picking preventing means, comprises a plug mounted rotatably within the cylindrical seat of a lock cylinder and has a first set of holes lying on a radial plane. The holes accommodate pins which cooperate with tumbler pins accommodated in a second set of holes formed in the cylinder and being aligned with the first set of holes. A longitudinal key slot extends through the plug which is in communication with the first set of holes and has a longitudinal rib arranged to project thereinto to provide support for the pins. The rib conceals the ends of the pins resting thereon, and defines an intersection of the longitudinal key slot with the cylindrical portions of said first set of holes accommodating said pins. One of the pins has the same length as the hole accommodating it, thereby if deceitfully shifted, it will unavoidably engage the hole of the respective tumbler pin and produce a locked condition of the lock.