Abstract: An improvement for a safety lock is provided which is especially useful in a double cylinder lock having a longitudinally split lock web ring, wherein the ring has a releasable interlocking connection in the form of a hinge at one side and a pair of radially extending pegs on an opposite side which can be clamped together by a retainer in the form of a washer or a clamp to secure the two halves together. If a washer is used, the pegs may have to be swedged over, but if a clamp is used in the form of a resilient member surrounding a portion of the lock ring, no swedging is required.

Abstract: The present invention relates to a safety lock including a cylindrical body in which is movably mounted a cylinder containing a safety mechanism which is constituted by pivoting blades meshing respectively with toothed wheels loosely mounted on an axis pin transversely connected to a cylinder and each provided with a notch adapted to be positively and drivingly connected to a catch for operating the lock mechanism, only after the notches are caused to coincide with the catch which initially is spaced from the wheels.

Abstract: In an attachment fitting for cylinder locks (3, 3') the heads (4a) of a plurality of screws (4) are seated in a widened hole portion (5a) in the lock. A plugging or latching element (6) is arranged to co-act with a sealing pin (7) in a manner such that when the plug (3a) of the cylinder lock (3) is turned to a given position by means of a key, the sealing pin (7) moves inwardly in a peripheral hole (9) arranged in the plug, against the action of a spring (10). This enables the plugging or latching element (6) to be removed. Because of the presence of the plugging or latching element (6), however, the screw heads (4a) cannot be reached in order to loosen the screws by persons not having the correct key to the cylinder lock. The screws connect the cylinder lock (3) to a further cylinder lock (3') on the other side of the door.

Abstract: A utility cylindrical lock set having a series of pin tumbler bores accommodating a plurality of pin stacks and biasing springs is provided with an improved cap. The external surface of a cylindrical lock body includes a cap-receiving groove crossing the open upper ends of the pin tumbler bores. The sides of the groove are undercut to form overlying flanges. An elongated cap having a central portion to overlie the pin tumbler bores and edge portions offset downward from the central portion is receivable within the groove. The edge portions of the cap project oppositely outward to engage the side flanges of the groove to retain the cap in place in the groove. A small recess is formed in one side of the groove. The elongated cap includes a complementary side protrusion to engage the recess to locate the cap against longitudinal movement in the groove.

Abstract: A cabinet push lock has a key plug held by a retaining pin engaged in a circumferential groove in the key plug and mounted in a bore coplanar with the pin tumbler bores. The pin tumbler stacks are held in their bores by an elongated cap mounted in a groove closed at the front and extending across both the pin tumbler bores and the retaining pin bore. The cap is held against endwise movement, as by interlocking with the sides of the groove. The groove side walls are staked at spaced areas to releasably retain the cap, and other areas are reserved for subsequent restakings. The retaining pin bore, an aligned diametric bore in the key plug, and a bottom opening in the lock body provide a passage for transmission of thrust to drive a portion of the cap out of the groove to permit cap removal. The diametric bore in the key plug contains a drive pin to block the key slot, and a key stop ahead of the drive pin blocks an additional portion of the key slot.

Abstract: A steering lock assembly for use in an automobile comprises a cylinder lock plug for controlling an ignition switch assembly with a mating key inserted in the cylinder lock plug and a steering shaft lock operatively associated with the cylinder lock plug for selectively locking and unlocking an automobile steering shaft. The cylinder lock plug comprises a key-operated barrel and the steering shaft lock comprises a locking member. As an element for transmitting rotation of the barrel, which is effected by turning the mating key inserted therein, to the locking member, a cam member is utilized, which cam member is integrally formed with the barrel.

Abstract: A key retaining cylinder for a lock operative on standard keys is disclosed. The cylinder of the lock includes an idler ring driven in rotation, with lost motion, by the lock plug. The idler ring is cooperatively disposed with respect to one of the pins so as to restrict the motion thereof when that lock has been used to lock the lock set and to not restrict the movement thereof when that lock has been used to unlock the lock set. Restricted movement of the pin together with the contrapment of the pin within the combinational notch of the key prevents removal of the key. Further features and embodiments are disclosed including provisions for symmetrical operation thereof for left-handed and right-handed doors.

Abstract: A lock cylinder incorporating a front retainer for a sidebar and a body counterbore to receive same, a core shell having a torquing engagement extension and an indexing protrusion to properly index the insertion and removal of the core, a torquing tumbler for applying rotational torque to the core, an improved centering spring, an inter-connection of a sidebar and a body engaging link of a removable core differential mechanism, a method of yieldingly biasing the engaging links outwardly from the core assembly, and improved combinating capabilities by arrangements of gatings in the rotary disc-tumblers for variable incrementations and the arrangement of tumblers and spacers of various thicknesses to achieve a variable spacings of the bittings.

Abstract: A lock cylinder having a key plug stop comprising an elongated arcuately formed wire received in an annular groove in the key plug. One end portion of the wire stop is retained in a slot in the cylinder shell. Opposite end portions of the stop are disposed in the path of the key and cooperate with the key to limit rotation of the plug relative to the cylinder shell. The stop may be assembled with the plug in either of two positions to selectively limit angular movement of the plug in either a clockwise or counterclockwise direction from a key withdrawal position.

Abstract: In a padlock having a plurality of peg housings in cylindrical form and opening onto a side surface of the padlock, a common width for closing all of the peg housings, which lid on its inside surface carries a plurality of projections, each for insertion into a peg housing and means for holding the lid to the padlock body.

Abstract: A key retaining cylinder lock device has a cylinder body with a bore therein extending along an axis. A plug is rotatable in said bore about the axis and is confined against axial translation. The plug has an axially extending keyway therein open to said bore and adapted to receive a key having an edge notch partly defined by an inner wall extending at least partially transversely of said axis. The plug also has a circumferential groove open to the keyway and open to a chamber in part defined by a plug chordal surface lying on both sides of the keyway and substantially perpendicular to the plane of symmetry of the keyway. In the groove and chamber is a partial ring having a central, inwardly directed lug adapted to contact the plug chordal surface with rotary lost motion therebetween.

Abstract: In a door lock assembly, a lock cylinder is releasably fastened within a lock cylinder housing by means of a catch affixed to the lock cylinder and operatively associated with a structure, such as a lock bolt assembly, within the lock cylinder housing. The catch is released by means of an actuating pin passing from the side edge of the door into the lock cylinder housing for disengaging the catch and allowing the lock cylinder to be removed from its housing. The pin, in a preferred embodiment, is carried within the lock bolt.

Abstract: A pin tumbler lock comprising a plug with top and bottom pins operable by a key, said plug being surrounded by an enclosure which may be alternatively a rotary sleeve for grand mastering or the cylinder of a lock. The sleeve or cylinder as the case may be is provided with a longitudinal recess in which is mounted alternatively one or more rotationally movable baffle inserts or slide pieces for each tumbler. These inserts are apertured for receiving the pins. Where the sleeve is present there is a recess at the internal surface thereof receiving the inserts and there is also a similar recess in the cylinder receiving inserts on the interior surface of the cylinder. These inserts may be circumferentially slidable or rotational.