Abstract: A steering lock assembly for use in an automobile comprises a cylinder lock for controlling an ignition switch assembly with a mating key inserted in the cylinder lock and a steering shaft lock operatively associated with the cylinder lock for selectively locking and unlocking an automobile steering shaft. The cylinder lock comprises a key-operated barrel and the steering shaft lock comprises a locking member. A retaining mechanism is also provided for temporarily holding the locking member in an unlocked position unless the key inserted in the barrel is withdrawn and comprises a locking link. This locking link is operatively accommodated in an elongated chamber in a lock housing and can be held in position inside the elongated chamber by inserting it in an axial direction of the barrel.

Abstract: An auxiliary lock assembly for a door hung in a frame consisting of a plate member having a portion disposed between the door and the door frame and extending inwardly of the door, a plate holding member having a slot receiving the extended portion of the plate member and engaging the inner side of the door to secure the plate member thereto, an angled portion of the plate member overlying an outer side portion of the door and having a pair of laterally spaced horizontal elongated locking members extending outwardly thereform, one of the locking members being pivoted to permit the door to close into the door frame and a lock member receiving and securing the elongated locking members and the lock member having a shoulder engaging the door frame.

Abstract: The prevalent lockrods type rear-end closures for overland cargo carrying vehicles are exceedingly vulnerable to determined thievery. The high security locking assembly of the present invention is highly deterrent to thievery and comprises a hasp including a pair of J-shaped members respectively removably engaged with the two closure lockrods and having the apertured staple of the primary J-hook member cooperatively protruding through a slot of the secondary J-hook member. The two cooperating J-hook members are securely joinable with a padlock having its U-shaped bar passing through the protruding staple, and hence, protectively shrouded by the cooperating J-shaped members. When the lateral spacing of the lockrods is relatively close, the locking assembly prevents closure play as additional deterrent to thievery. The locking assembly will also accommodate relatively distant spacing of the lockrods and even if the two closure doors include a rearwardly protruding upright rib.

Abstract: An anti-theft device for a motor vehicle comprises a locking bolt movable into a locking position to secure a steering column, and a cylinder lock actuated driving plate movable in a direction transverse to the direction of movement of the locking bolt. The driving plate is provided with an inclined slot which drivably engages a pin attached to the locking bolt. The end of the slot is provided with a cut-out portion forming a surface against which the pin engages if the locking bolt is moved in an unauthorized manner. Furthermore, the surface of the cut-away portion is so shaped that the driving plate is urged to remain in its locking position. For authorized unlocking, movement of the driving plate by means of the cylinder lock opposite to its locking position causes the slot to drive the locking bolt into an unlocked position.

Abstract: A latch, as for a door, having a handle movable to latch and unlatch the door and a removable lock located within the handle. The lock is provided with a stop engaging finger on its end and a retractable bolt on its side. The lock receptacle in the handle has a plurality of bolt engaging surfaces therein which hold the lock in the handle in a locked position wherein the finger engages the stop to prevent movement of the handle, hold the lock in the handle in an unlocked position in which the finger does not engage the stop, and provide a means whereby the bolt may be completely retracted for lock removal.

Abstract: A lock device for vehicles such as bicycles and motorcycles having tubular frames which comprises a cable or chain threaded into an opening in a frame member with a stop to prevent full extraction from the frame, and a loop or other means to receive a padlock shackle to lock the vehicle to a post or to lock the wheel of a vehicle to prevent rotation.

Abstract: The latch assembly is provided with a locking collar and a pair of knockouts so that the latch assembly can be easily converted to a latch-lock assembly by simply inserting a cylinder lock in the proper knockout, depending upon whether the assembly is used in a right-hand or left-hand installation. The conversion of the assembly may be made before or after installation of the latch-lock assembly.

Abstract: A protective housing and latch mechanism for securing the protective housing in a position protecting the customary housing for a coin mechanism and coin box. The protective housing permits normal operation of the coin mechanism and is of sufficient strength to resist deformation by sledge hammer blows. The protective housing carries a latch mechanism which locks the protective housing to the original housing for the coin mechanism so as to prevent separation of the two housings. The latch mechanism includes a pivotally mounted latch member which is urged to a latching position and held in that position by a barrel type lock which is disposed in an inaccessible position within a hardened block.

Abstract: A locking device (10) for locking a locker (12) is disclosed. A bracket (26) attaches a padlock (50) to the interior surface (36) of a door (18). A latch plate (28) is connected to a shackle (54) of the padlock (50). A handle (30) extends through a slot (58) of the door (18) and is connected to the latch plate (28). A strike plate (34) cooperates with the latch plate (28) and the shackle (54) to lock the door (18).

Abstract: A locking device for use on suitcases comprising two keepers, each having a lateral notch and with an outermost surface inclined to form a cam, two lock-staples inside of which are engaged the keepers, latch hooks pivotally mounted in the lock-staples, which hooks are adapted to engage in the notches provided in the keepers under the action of elastic members when the suitcase is in its closed position, the latch hooks being connected to an opening control bar and to a locking bar, both bars being mounted for axial sliding movement inside a housing of the suitcase.

Abstract: A shield is rotatably mounted to a threaded element of the closure on an axis coincident with the axis of the threaded element, so that the shield impedes access to the threaded element. The shield can be removed from the threaded element or connected to the threaded element only upon actuation of the closure by an appropriate key. Absent such actuation, the threaded element cannot be rotated for disengagement from the conduit by rotating the shield. The closure is protected against attempts to disengage it from the conduit by bonding the shield to the threaded element with an adhesive and rotating the shield.

Abstract: A fuel tank lock for use with a conventional filler neck of an automotive vehicle. The filler neck has a baffle plate formed with a constricted passage normally closed by a biased-shut valve carried by the baffle plate. The valve is forced open when engaged by an unleaded fuel nozzle. The upper end of the filler neck is provided with a conventional fuel tank cap. The fuel tank lock includes a body provided with a key operated lock and a shank that extends through the constricted passage. The lock operates a latch that engages the underside of the baffle plate to prevent unauthorized withdrawal of the lock from the filler neck.

Abstract: Disclosed is a security device and method. The device includes a bolt having a first hole drilled radially therein, a second threaded hole drilled axially therein to intersect the first hole, and a third hole formed axially therein connecting the second hole with the end of the bolt. A bar is insertable into the first hole to extend radially outside the bolt thereby to prevent a nut from being removed from the bolt. The bar is secured in the bolt by means of a pick-proof lock that has a screw portion threadably engagable with the second hole to engage the bar, and a lock body configured to fit the third hole.

Abstract: A plug-fastener for safety belts in motor vehicles, which comprises a tongue-like plug part and a receiving part for receiving and retaining the tongue-like plug part. The plug part is provided with at least one recess, undercut, or a shoulder. The receiving part comprises at least one locking member which engages the recess, undercut or shoulder of the plug part, and, after the plug part has been received by the receiving part, is operable to retain these parts until the parts are separated deliberately. In the receiving part in the path of movement of the plug part there is movably arranged a holding member one end or extension of which is adapted to engage the locking member in its unlocked position and to prevent the latter from moving into its locking position until the plug part has contacted the holding member and has moved it out of engagement with the locking member.

Abstract: A lock apparatus shields the valve stem of a petcock and prevents unauthorized opening of the petcock.

Abstract: A fluid-actuated locking device for the doors of dwellings or offices or for armored doors having a plurality of tubes for the flow of a fluid supplied from a reservoir, which fluid may either be pressurized to operate a lock or may flow back through the tubes after the release of the pressure so as to allow the locking of the door; a presettable combination is provided to predetermine whether fluid will flow through the tubes thus allowing operation of the lock to unlock the door, numbers or letters being provided and usable in the presettable combination; the fluid is subjected to pressure by a pump to effect withdrawal of pistons from the locking once the preset combination has been set to the preselected combination; the fluid is fed to the lock by a valved manifold which also controls the back flow of the fluid from the lock to the reservoir and works in association with the presettable combination to unlock or lock the door; and locking of the door is accomplished by the action of springs in the lock an

Abstract: An anti-theft device to prevent the unauthorized removal of a mounted, flanged object comprising a cover overlying the mounting flanges of the object, a securing device for attaching the cover to the surface upon which the flanged object is mounted and a locking device for preventing removal of the cover from the securing device. The invention is particularly useful in remote oil field and other field uses to prevent theft of industrial machine accessories such as starters, generators, and batteries.

Abstract: The security device of the present invention is mounted in the floor of a building adjacent the hinge side of a door to be made secure. The security device has elements which can be elevated from their storage position to engage against the inner face of the door to prevent the door from being opened beyond a minimum amount. A lock is provided for holding the elements in their elevated position.

Abstract: A handle lock device for a switch, to be mounted to a switch manipulation handle protruded through a handle manipulation opening of a case in which a switching mechanism of the toggle-type is contained, is a lock cover which has a portion elongated so as to be introduced into the handle manipulation opening, whereby the lock cover prevents sufficient handle swing to effect the switching, since one of the side surfaces of the elongated portion is adapted to abut one of the end surfaces of the handle manipulation opening before the toggle-link goes over its dead center. The handle lock device makes it possible that a single lock cover can be used to lock handles of switches having different angles in the "on" and "off" states, and also that the handle may be easily and simply locked by a locking means having a simple constitution.

Abstract: A lock apparatus for attachment to the top of an input pipe communicating with a storage tank includes an open-ended cylindrical housing for mounting to the top of the input pipe, a butterfly valve mechanism pivotally mounted in the housing with a butterfly valve activating axle protruding through an orifice in the housing, and a locking mechanism. The locking mechanism includes a latch pivotally attached to the protruding end of the axle, a lock flange attached to the outside of the housing and, a tamper prevention flange in linear alignment with the axle and the latch to prevent unauthorized tampering with the axle and attached latch. The latch may be coupled to the lock flange and locked to maintain the butterfly valve in the closed position across the interior of the housing.