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 key operated dead bolt lock includes one or a pair of standard threaded mortise cylinders. The lock further includes set screws, inaccessible from either side of a door in which the lock is installed, which prevent rotation of the cylinders. The cylinders hold cylinder collars in place to prevent access to the bolt from the side.

Abstract: Deadlocking mechanism of the kind including a deadbolt slidably located in a casing so as to be projected beyond an end of that casing in an operative position, and to be substantially contained within the casing in an inoperative position. An actuator such as a key operated pin tumbler lock is operable to cause movement of the deadbolt between its two positions. The invention comprises an improved drive connection between the actuator and deadbolt, which includes a toothed pinion rotatable with the actuator and a rack cooperatively engaged by the pinion and arranged for movement with the deadbolt. That drive connection also includes two gear segments which rotate with the pinion and actuator respectively, and have intermeshing engagement during part only of the pinion movement corresponding to movement of the deadbolt between its operative and inoperative positions.

Abstract: Tamper-free exterior lock apparatus to affix to a door for maintaining latched engagement to the door's frame. Two sets of shackles, one pair fixed to a backing plate and the other insertable with respect to a lock housing, engage, respectively, a primary lock and a secondary lock so that no portion of the shackle is exposed when coupled with its lock. Primary lock guards protrude from the lock housing to restrict access to the primary lock. A slide bar having a latching portion at one end and a lip portion oriented perpendicular to the main portion of the slide bar at the other end is maintained in slidable relationship to the backing plate and housing to allow the movement of the lock apparatus from its latching position to its open position and to block the slide bar from movement when either or both of said locks is engaged to its set of shackles.

Abstract: A locking mechanism having at least one but preferably two locking bolts movably supported for guided linear movement in a housing between locked and unlocked positions. Where two locking bolts are employed, each locking bolt moves in a direction opposite from the other. The locking mechanism is characterized in that each locking bolt is comprised by at least two superposed bolt parts which are linearly movable along the longitudinal axis of the bolt relative to each other and are provided on the corresponding longitudinal edges with a plurality of spaced matching teeth having an angle of 10.degree.-80.degree.. A key is provided for guided linear movement through a keyhole perpendicular to the bolt parts and having teeth matching those in the bolt parts formed in at least one of its side edges and where two oppositely moving bolts are provided, the key has matching teeth formed in each of the side edges thereof.

Abstract: A locking mechanism is provided having a frame for mounting on a door or other closure. A movable bolt is supported on the frame for movements between extended and withdrawn positions. An additional member is mounted on the frame for slidable movements generally parallel to the bolt. At least two locking means are incorporated into the locking mechanism, the first of which releasably connects the bolt to the member, and the second of which releasably positions the member with respect to the frame. With the first locking means engaged, the bolt is movable together with the member. With both the first and second locking means engaged, the bolt is locked in the extended position. A securing means engagable with the first locking means prevents release of the first locking means. The locking mechanism is particularly adapted for use on storage compartments wherein a renter of the compartment will gain access by way of the first locking means and the owner will gain access by way of the second locking means.

Abstract: A double cylinder lock constructed with a single tailpiece driver and a clutch. The interior lock key can be extracted only when the lock bolt is retracted and not when the lock bolt is extended. The driver and clutch arrangement prevent either cylinder from becoming out of time, regardless of which cylinder is used to throw the bolt.

Abstract: A double deadbolt lock having a housing in which two latch bolts are mounted for reciprocal movement between an extended locking position and a retracted unlocked position. The bolts are in transverse alignment so as to have an elongated face on one opposite an elongated face on another. Each of the two opposite faces has a pattern of alternate, allochirally arranged lands and grooves extending obliquely away from one end of the bolts toward the other end. The housing has a keyhole extending therethrough in alignment with the said opposite faces of the bolts. The key for locking and unlocking the bolts has a shaft having a cross-sectional size and shape corresponding to the size and shape of the hole. Opposite edges of the shaft have alternate lands and grooves complementary respectively to corresponding lands and grooves of the latch bolts.

Abstract: A meter cover (housing) mounted mechanism incorporating a combination key operated tamper resistant security lock, externally controllable meter reset actuator and meter access hatch.

Abstract: A key-operated security lock of the kind including a key-identification mechanism, a thrower turned by the key and a deadbolt, has the deadbolt isolated from the thrower, and includes means operable only by correct identification of the key for connecting the thrower to the deadbolt and for removing a stop preventing retraction of the deadbolt from its extended position. The said means preferably includes a lever pivoted to the deadbolt and formed with a locking projection capable of engagement with a complementary recess in a runner driven along a path parallel with that of the bolt by co-operation with the thrower to connect the thrower to the deadbolt as a result of pivoting of the lever which is prevented by a further member in the form of a pivoted arm which holds the pivoted lever in a position such that its locking projection is clear of its recess until the pivoted arm is allowed to turn by the key-identification mechanism.

Abstract: A lock has a bolt and a key-operated barrel at right angles, and with their axes coplanar. A pinion has teeth which engage teeth on the bolt and teeth on an extension of the barrel. The pinion, bolt and barrel are in a longitudinally split housing, held together by screws, the pinion having a slot to receive one of the screws. The barrel lock moves a latch plate transverse to its axes, so as to extend into a slot in the housing to prevent movement of the barrel.

Abstract: A shielded lock assembly incorporating a body surrounding a deadbolt subassembly. The body renders more difficult access to the deadbolt subassembly in order to reduce the incidence of theft involving the prying, cutting, or other destruction of the deadbolt subassembly. In one embodiment of the invention the deadbolt subassembly is received within a retaining cage which is itself received within the body. Aperture means are provided in the body and the retaining cage which are adapted to receive at least one locking bracket or staple in locking alignment with the deadbolt.

Abstract: A cylinder lock, particularly a rolling gates cylinder lock, which may be mounted, at will, as a right or a left lock. The lock is provided with a sliding bolt which is guided for its movement into locking and unlocking position by a guide block housed inside of the lock casing. To the central portion of the sliding bolt a rack bar is secured, in mesh with the pinion operated by the cylinder of the lock. The said rack bar acts as an abutment member in cooperation with the lock casing in order to limit the sliding movement in both directions of the sliding bolt. Means are provided for fastening the said lock to a rolling gate by using nuts and bolts.

Abstract: An improved lock is provided for hinged glass doors which can be attached to the doors without the need for attachment screws and the like. The lock includes a pair of coacting casings which include suction-type securing means for attaching the casings to the respective doors. The first casing comprises a single piece integral metal housing which is open on one side and includes a locking mechanism, having an associated lock bolt, which is disposed in and occupies approximately one-half of the housing, the other half being empty. The second casing member comprises a base portion which is similar to the first housing and includes, in addition, an "upper" or overlying portion which extends parallel to the base portion and is affixed thereto by an upstanding wall located in approximately the middle of the base portion.

Abstract: A latch mechanism is mounted on a door or panel hingedly mounted on the frame of a construction vehicle or the like. The latch mechanism comprises a handle pivotally mounted in exposed relationship on an upper side of the door for movement between latched and unlatched positions thereon. A guide block is secured to an underside of the door and a latch member is slidably mounted in the guide block. The latch member is connected to the handle for sliding movements between a latched position underlying a stationary panel of the vehicle and an unlatched position whereby the door may be opened in response to raising of the handle. Detent means are provided between the guide block and the latch member to hold the member in its unlatched position when the door is open. A key lock may be mounted on the door to selectively hold the latch member plate in its latched position.

Abstract: A lock mechanism housed in a steel case and directly weldable to iron doors, gates, grilles and similar objects, a bolt slideable in either direction along its longitudinal axis, a fixed member adjacent a long side of said bolt, said fixed member having an opening alignable with a dimple in said bolt side, a sliding member driven in either direction along its longitudinal axis by key or knob operated lock cylinder mechanisms, said sliding member having an opening alignable with dimple in said bolt, a ball retained in opening of fixed member and movable between dimple in said bolt and opening in said sliding member.

Abstract: A floating bar, ball bearing, dead bolt-type lock comprising rotatable plug means disposed within stationary core means and carrying a bolt rest means engagable with a reciprocal bolt member for selectively moving the bolt member between locked and unlocked positions. Floating bar means having cooperating elements disposed in both the plug means and core means retain ball bearing means in preselected positions for riding along one edge of the proper key in order to permit movement of the bolt member to an open position, and to permit movement of the bolt member to a closed position, and to substantially preclude picking of the lock.

Abstract: A bolt is reciprocally extended and retracted in a door by a latch driving mechanism operably connected to exterior and interior operator assemblies projecting from a mounting opening between faces of the door. A pair of inwardly dished reinforcing plates edge abut the door faces spanning the door opening and the exterior operator assembly is secured inwardly against its respective reinforcing plate by primary fastening screws engaged with a lock frame of the exterior operator assembly, through the latch driving mechanism and end secured in the opposite interior reinforcing plate.

Abstract: A lock device includes a housing and a removable cylinder normally retained in the housing by a rotatable retainer ring. The retainer ring is driven by a shifter and cylinder change key between a locked and unlocked position. The retainer ring is normally biased to the locked position so that tabs associated with the retainer ring will engage appropriate locking channels of the cylinder and retain the cylinder in fixed position in an opening of the housing.

Abstract: This invention relates to a multiple padlocking device commonly used in conjunction with gates for the entrance to a particular piece of property. A vertical rotatable plate is carried on a stationary horizontal axis in the same plane as the fence and gate when the gate is closed. A series of holes are located in the rotatable plate with individual bars being pivotally attached to the plate to cover each respective hole. Locking holes are contained in both the rotatable plate and each pivotable bar contained thereon to lock the bar into a position covering each of the respective holes. A horizontally slidable locking bar which is in the same plane as the gate, slidably extends through a gatepost with one end thereof extending into a hole in a fencepost.

Abstract: A lock is provided having a cover and a casing in which the cover is normally removable from the lock. The casing has an opening to receive a bolt therethrough, and means on the cover to engage the bolt whereby the cover cannot be removed from the casing when the bolt is in its advanced position.

Abstract: Double cylinder door lock which operates a ceiling- and/or floor-socketed lock bolt which can be added to inner face of already hanging door. Either or both operating cylinders can be key-operated pin tumblers.

Abstract: A door lock having two escutcheon plates clamped against the sides of a door, two mortise cylinders mounted in coaxial relation in the escutcheon plates and each having a rotatable key plug and an actuating arm on the inner end of the plug, a bolt slidable between extended and retracted positions, and a toggle joint bolt-operating mechanism actuated by the actuating arms on the key plugs. This mechanism includes a bolt link pivotally connected to the inner end of the bolt, and an actuating link between the ends of the key plugs having abutment means for coupling and uncoupling of the arms and the actuating link which is urged in toward the locked and unlocked positions by a toggle spring movable into oppositely over-center positions. The abutment means comprise two spaced tabs defining a slot into which the actuating arm is eccentrically extended and retracted during rotation of the key plug through full locking and unlocking revolutions.