Abstract: A cylinder lock assembly is disclosed which comprises an outer cylinder having a front end with a key hole and a rear end with an end member. The outer cylinder encloses a rotatable inner cylinder. The end member and the outer cylinder are provided with mutually corresponding groove arrangements forming an axially fully interlocking attachment, between these two parts. The end member is insertable in a radial direction into the outer cylinder for attaching it thereto. The assembly also includes an attachment locking member engaging the outer cylinder and the end member in order to lock the end member to the outer cylinder in radial direction. The assembly can also be provided with a latch member arranged to move radially guided by the end member and the outer cylinder. The latch member may also serve as a fastening member of the assembly.

Abstract: A lock follower comprises two main parts, i.e. a central part and a cylindrical bearing part which are attached to each other. The central part is punched from a sheet-metal blank. The cylindrical bearing part partially surrounds the central part and has a slot through which a portion of the central part projects. The bearing part may comprise a piece of tubular material or alternatively a strip of material wound to cylindrical shape on a portion of the periphery of the central part. The two parts may be joined together by welding or by deformation of material belonging to either or both parts.The invention also concerns a method of manufacturing a lock follower of the above-mentioned kind, whereby for the cylindrical bearing part initially either a tubular piece of material or a piece of strip material is used.

Abstract: A laminated padlock includes a pair of coplanar locking plates slidable into locking positions in engagement with the two legs of a J-shaped shackle and a separate coupling member positioned between the lock barrel and the locking plates to prevent picking of the lock by means of a tool inserted through the key slot in the lock cylinder.

Abstract: A double cylinder safety lock has a bolt projected and retracted by a device having a rotatable hub. A key operated exterior device has a lost-motion connection to the rotatable hub so the key can be extracted from the device with the bolt in projected position or retracted position. A key operated interior device has either a direct or a lost-motion connection (depending upon the key used) to the rotatable hub, the hub connections being arranged to turn together. A key for the interior device can project and retract the bolt but can be extracted only when the bolt is in retracted position.

Abstract: A removable lock for bicycles or the like wherein a portion of the lock housing extends into the interior of the tubular head or sleeve and the fork stem is locked therein to prevent rotation of said parts. Means are also provided on said lock housing for anchoring a wire rope or restraint to effectively prevent theft of the bicycle when the wire rope is wound around a metal post or rack.

Abstract: A burglar alarm device comprises a door lock fixed on a door, a switch closed by a locking operation of the door lock, a door switch closed by an opening operation of the door, an electric circuit which retains an energized state caused by a closing operation of the door switch when the first-mentioned switch is closed and an alarm controlled by the electric circuit.

Abstract: A cylinder lock for a rotary switch having a rotor, a stator surrounding the rotor and an engagement sleeve surrounding the stator. The engagement sleeve is attached to the fixed portion of the rotary switch and the stator is coupled to the movable portion thereof. Separate latching devices are provided between the stator and engagement sleeve and between the rotor, stator and engagement sleeve. Sets of tumblers are also provided between the rotor and stator and the rotor has a key slot, the position of which indicates the switch position. Insertion and rotation of the key rotates the rotor, disengaging the tumblers and the latching device between the rotor, stator and sleeve, permitting the rotor to rotate alone through a predetermined angle. Further, torque applied to the key causes the latching device between the stator and sleeve to disengage, rotating the stator and the rotary switch to the new switch position at which the stator-sleeve latching device re-engages in that new position.

Abstract: A removable lock primarily designed for bicycles or the like which is incorporated in the tubular head or sleeve and extends interiorly into the tubular steering stem or post, the lock including tumblers, a stationary housing and an interiorly positioned rotary shaft associated with said tumblers including a pair of spring arms which wind around the shaft in inoperative position and extend outwardly in operative position through said housing interiorly of said stem to prevent rotation of the steering post and withdrawal of the lock. Means are also provided for anchoring a wire rope or restraint on the lock to effectively prevent rotation of the wheels, etc.

Abstract: A gate latch including a body-mounted latch bolt which may be actuated to an elevated position from outside the gate by a lever extending through the gate to disengage the bolt from the latch strike. A lock device is provided which may be key-operated on the outside of the gate to locate a detent or cam element in a position to prevent movement of the lever, thus preventing the gate from being opened from the outside. Additionally, or alternatively, a cam or crank-like element may be actuated by the lock to prevent rotation of the latch bolt to unlock the gate. The element may be mounted so as to have a relatively slidable portion thereon which is actuatable, against a spring biasing force, to allow the bolt to be rotated, by one of the inside of the gate, to open the gate.

Abstract: A cylinder lock has a socket portion formed integrally with the rear end of its cylinder for connection with a flat stamped shaft. The shaft has an enlarged head at its front end and a medial enlargement defining forwardly facing shoulders. The socket has a cavity in which the shaft head is rotatable, a noncircular bore opening rearwardly from the cavity through which the head can be inserted forwardly into the cavity in one position of shaft rotation, and grooves opening forwardly to the cavity in which the head is receivable upon rearward motion of the shaft in another position of its rotation. A coiled expansion spring reacting between said shoulders and the rear of the socket confines the head in said grooves.

Abstract: A security cap for the filler conduit of a motor vehicle fuel tank including a lock body provided with a key-operable latch. The lock body is completely accommodated within the upper end of the filler conduit, and locked in place beneath the conventional screw cover of the conduit. The upper face of the lock body is smooth and unbroken, and provided with a key slot.

Abstract: A lock having a freely rotatable barrel, in which there is provided a housing for the lock, a barrel rotatable within the housing, a locking arm and hub rotatable within the housing independently of the barrel, a clutch member on the barrel swingable between engaged and disengaged positions, for engaging the hub member and rotating the locking arm, a clutch control member swingably movable within the barrel, being swingable about the axis of rotation of the barrel, and connecting with the clutch member to move it between its engaged and disengaged positions, and to restrain movement thereof when disengaged, and there being a plurality of generally cylindrical pin members located in the barrel, and lying on axes parallel with but spaced from the central axis of rotation of the barrel, and being movable relative to the barrel and to the clutch control member whereby to secure or release the clutch control member for movement relative to the barrel.

Abstract: A safety release for unlocking the trunk lid of an automobile from within the trunk compartment. The release is an integral part of the lid locking mechanism and includes a clutch assembly for disconnecting the latch shaft from the key tumblers and a hand operated linkage for actuating the clutch and rotating the disconnected shaft to move the latch components from the normally locked to the unlocked position.

Abstract: A pickproof cylinder lock has a plurality of key-actuatable spring-tensioned pin tumblers wholly received in the cylinder and slidably mounted therein, and a ball connected with each pin to be raised or lowered with the pin. The balls are normally held in inactive positions by their pins, but when a proper key is inserted, the balls are brought into active positions by their pins and form a straight link through which key actuation of the pins is translated into a force on a lock-operating member to move the same to a lock-open position. A spring member normally locks the lock-operating member rigidly in a lock-closed position, and the force produced by the balls in their active position is also directed against the spring member to move the latter to a position in which it releases the lock-operating member.

Abstract: A combination key operated vehicle door lock and burglar alarm switch having a cylinder lock which is mounted on the vehicle door and operated by a prescribed key. A semi-circular shaft axially extends from the cylinder lock and supports a latching device which is utilized for controlling the opening and closing of the door, as well as a switch device which is utilized for completing the electrical circuit of the burglar alarm system. The single key is utilized to both operate the opening of the door as well as the arming of the burglar alarm.