Abstract: A plurality of color-coded lockbox tags that attach to a lockbox and visibly communicate a corresponding plurality of showing instructions relative to the lockbox. Where the underlying lockbox includes an entry mechanism involving an infrared port, the lockbox tag may include an aperture or window to expose an infrared port. A plurality of optional placards may also be provided to augment or override the primary showing instructions of the lockbox tag.

Abstract: The locking container is a selectively lockable container for the storage of used cooking oil and the like. The locking container includes a reservoir and both front and side locking mechanisms. The front and side locking mechanisms selectively retain a screen within the reservoir. The container is adapted for the disposal of oils, solvents, acids and various other liquid wastes. The pair of locking mechanisms allow access for storing the liquid waste in the container, but prevent unauthorized removal of the liquid waste. The container includes a lid to cover the screen, with the lid being secured by the front locking mechanism. The side locking mechanism locks the screen to the reservoir.

Abstract: A lock assembly including a housing, a fastener that has a head, a lock member that is movable between a first position and a second position, and a barrier that is movably disposed within the housing. The barrier is displaceable between a first position at which the barrier at least partially covers the fastener head, and a second position at which the fastener head is generally accessible. The barrier is coupled with the lock member such that the barrier displaces from the barrier first and second positions when the lock member displaces between the lock member first and second positions.

Abstract: A multiple function lock comprising a body, an engaging element having a first end and a second end, a locking mechanism for securing the first end and the second end of the engaging element to the body, and a gate mechanism for selectively concealing or revealing a passage in the body through which the second end may move to unlock the lock. In certain embodiments, a multiple function lock may comprise a body, a U-shaped shackle having toe and heel portions, the heel portion rotatably secured within the body, a locking mechanism for locking the heel and the toe portions within the body, a passage through the body adjacent to the toe portion, the toe portion adapted to move through the passage to unlock the lock, and either a retaining cup, an adjustable gate, or an outer housing, each being adapted to selectively block or reveal the passage.

Abstract: A lock guard protects a padlock with a shackle and the ends of a securing connector. The device comprises a five-sided housing with an open bottom. Two opposing sides of the housing have opposing openings therethrough for inserting the ends of the securing connector. Inside the housing is a retaining tab having an opening therethrough dimensioned to receive the end of the shackle. The housing can also contain an abutment providing a surface against which to drive the top of the shackle when locking the padlock within the lock guard. When the retainer tab is vertical, the top edge of the hole in the retainer tab can act as an abutment.

Abstract: A lock guard is provided for padlocks securing different type J-hook latches of roll up doors in their locking position. The lock guard shrouds the shackle of the padlock thereby deterring vandals use of cutting tools to sever the shackle.

Abstract: An anti-theft shield that protects the latching apparatus on the large rear doors of cargo trucks and truck trailers is provided, the shield including an elongated sheath-like member for sliding over and enclosing the cargo door latch handle, and a connected panel member for extending over and protecting the cargo door latch mechanism and the associated padlock for locking the latch handle to the latch mechanism. At a first end of the sheath-like member on the rear side thereof is a planar guide member for insertion behind the latch handle and pivot pin locking hook. The shield is secured in position over the latch mechanism by means of the guide member in combination with a shield locking bracket having an opening for accepting the padlock bight during the locking procedure.

Abstract: An anti-theft device comprises a housing for enclosing and locking in place the accelerator pedal of vehicles such as a golf cart. The housing is formed from rigid steel or other suitable materials and includes an open top and a bottom having a T-shaped opening therein to allow the accelerator pedal to be inserted therethrough. An L-shaped retaining rod is placed through an opening in one side of the housing, slid behind the accelerator pedal and positioned through the opening in the opposing side of the housing. A padlock or similar device is placed through an aperture in the retaining rod to secure the housing to the golf cart and prevent depression of the accelerator pedal. The anti-theft device thus prevents the accelerator pedal from being depressed and the vehicle being moved or stolen.

Abstract: A shield device is for fastener(s) of a lock assembly that is adjustable between inoperable and operable states, each fastener including a head and being removably engageable with a door to connect the lock assembly therewith. The shield device includes a barrier displaceable between a first position, where the barrier covers the fastener head to prevent removal of the fastener, and a second position where the fastener is accessible to permit removal. The barrier is disposed in the first position when the lock is in the inoperable state and in the second position when the lock is in the operable state. Preferably, the lock assembly includes a member that adjusts the lock assembly between the operable and inoperable states and the barrier is coupled with the member. As such, when the lock member adjusts the lock assembly between the two states, the barrier displaces between the first and second positions.

Abstract: Gate multi-locking apparatus includes two housings, one attached to a gate member and the other attached to a structural member. A latch bar is positioned externally of the housings and extends between the housings to prevent movement of the gate member to open position. Latch bar supports extend into the housings and are locked in place by lock members extending therethrough and padlocks holding the lock members in place.

Abstract: A portable shroud for a lock securing ends of a cable or chain includes a tubular element having sufficient interior dimensions to accommodate a plurality of locks where the dimensions mitigate attempts to reach the lock with a cutting means. At least two slots accept the ends of the cable or chain where only the ends can be inserted into the tubular element for engaging with the locks and where either end of the cable or chain can be removed from the shroud by disengaging a respective one or more locks. At least two tubes are joined to the tubular element where an end of each of the tubes covers the slots such that the ends of the cable or chain pass through the tubes and the tubes further mitigate attempts to reach the locks with the cutting means.

Abstract: An anti-theft shield that protects the latching apparatus on the large rear doors of cargo trucks and truck trailers is provided, the shield including an elongated sheath-like member for sliding over and enclosing the cargo door latch handle, and a connected panel member for extending over and protecting the cargo door latch mechanism and the associated padlock for locking the latch handle to the latch mechanism. At a first end of the sheath-like member on the rear side thereof is a planar guide member for insertion behind the latch handle and pivot pin locking hook. The shield is secured in position over the latch mechanism by means of the guide member in combination with a shield locking bracket having an opening for accepting the padlock bight during the locking procedure.

Abstract: The brake bolt and the lock cylinder of the vehicle lock are mounted in a part of the vehicle for preventing the rotation of a wheel of the vehicle in a locked state. The brake bolt and lock cylinder are mounted in a brake bolt bore and a lock bore, respectively, located in the swing arm, the chain guard, or a lock body mounted over the axle-retaining nut. The vehicle lock engages a ventilation hole on the rotor, a ventilation hole on the sprocket, the teeth of the sprocket, or a hole on the hub to prevent rotation of the wheel in the locked state. Preferably, the lock cylinder is mounted to the vehicle in both the locked state and the unlocked state, and in the unlocked state the brake bolt is removed from the brake bolt bore for operation of the vehicle.

Abstract: A method of bracing a security container relative to the structural features of a building in a substantially tamper-proof manner wherein the security container including at least one container (2) having an interior (3) for storing valuables therein, the container (2) having at least one opening (7) thereinto, a closure (8) covering the at least one opening (7) into the container (2), and locking (16) to secure the closure (8) over the opening (7), the security container being configured to be fitted into a recess within a surface and the security container further including retention, the retention including bracing (30a), the bracing (30a) characterized by effecting a brace relative to one or more permanent structural features associated with the surface to impede forced removal of the security container from the recess.

Abstract: The Container-Locking Device with respect to this particular invention has been designed to fasten the locking upright bar of one door of a container to another. It has been invented to include two virtually symmetrical segments of a pair of locking bar fasteners, where the flat end of each segment, opposite to the end fastened to the container door locking bar, will be fixed to one of the two virtually symmetrical segments of a padlock shroud. There is also a separation-prevention unit which prevents the shroud from being separated and eliminates the gap between the two segments when they are joined, in order to prevent a bolt cutter from being able to be inserted into the padlock shackle.

Abstract: The invention is a security locking device that secures a forklift while hitched to a commercial trailer. The invention includes a “U” shaped base member having a pin hole, a pin, and an attaching locking mechanism. The invention is designed so as to place the “U” shaped base member over the locking pin hole located on the trailer bed, insert the locking pin through both the pin hole of the “U” shaped base member and the locking pin hole of the trailer bed, and then place a locking mechanism onto the pin and “U” shaped base member. The components of the invention shall be made of a tool-grade steel or a metal of like strength-ness.

Abstract: A lock assembly includes a lock body and a keyway covering member. The lock body includes a keyway disposed on an outer surface. The keyway covering member is assembled with the outer surface of the lock body, and is slideable between a covering orientation and an uncovering orientation. When the keyway covering member is in the covering orientation, a covering portion of the keyway covering member aligns with the keyway to cover the keyway. When the keyway covering member is in the uncovering orientation, an opening in the keyway covering member aligns with the keyway to permit insertion of a key in the keyway.

Abstract: A protective cover for a keyway disposed on an end surface of a lock is provided. A housing is adapted to be assembled over the lock end surface. The housing includes an opening that surrounds the keyway. At least one door is disposed in the housing opening. The door includes an edge for aligning with the keyway in a key insertion position. When a key is pressed against the door, the door moves away from the keyway, providing a key opening in the housing opening for insertion of the key into the keyway. At least one door biasing member engages the door and biases the edge of the door toward the keyway. The door is mounted on a pivot member disposed in the housing opening such that the pivot member and door pivot within the opening when the key is inserted into the keyway and turned in the lock. At least one pivot biasing member engages the pivot member to hold the edge of the door in alignment with the keyway when the keyway is in the key insertion position.

Abstract: A padlock protector pouch that can be used to cover and protect a padlock, including a padlock body and a padlock shackle, and associated chain links of a chain that are locked together by the padlock without unlocking the padlock and removing the chain links therefrom. A locking system is also provided.

Abstract: The present invention is a locking system comprising a cylindrical padlock, a lock securing member attached to the cylindrical padlock, a padlock guard, a hasp plate, and at least one of the following: an outer flange on the padlock guard mounted parallel to the hasp plate or an outer flange on the hasp plate mounted perpendicular to the hasp plate. The locking system allows the user to securely store the lock when it is not in use.

Abstract: A padlock protector pouch that can be used to cover and protect a padlock, including a padlock body and a padlock shackle, and associated chain links of a chain that are locked together by the padlock without unlocking the padlock and removing the chain links therefrom. A locking system is also provided.

Abstract: A padlock includes a lock body, a shackle, and a sleeve. The lock body includes opposed front and rear longitudinally extending side walls terminating at first and second end portions. The shackle extends from the first end portion of the lock body. The sleeve covers at least a portion of each of the longitudinally extending side walls, and an internal surface of the sleeve includes at least one longitudinally extending rib contacting at least one of the front and rear longitudinally extending side walls to define a gap between the sleeve and the lock body.

Abstract: A multiple function lock comprising a body, an engaging element having a first end and a second end, a locking mechanism for securing the first end and the second end of the engaging element to the body, and a gate mechanism for selectively concealing or revealing a passage in the body through which the second end may move to unlock the lock. In certain embodiments, a multiple function lock may comprise a body, a U-shaped shackle having toe and heel portions, the heel portion rotatably secured within the body, a locking mechanism for locking the heel and the toe portions within the body, a passage through the body adjacent to the toe portion, the toe portion adapted to move through the passage to unlock the lock, and either a retaining cup, an adjustable gate, or an outer housing, each being adapted to selectively block or reveal the passage.

Abstract: The vehicle brake-rotor lock includes a mounting bracket, and a lock mechanism, including at least one deadbolt shaft, which is preferably made of steel, stainless steel, titanium, tungsten, boron, or any other dense metal, used to mechanically immobilize the vehicle. The bracket is preferably permanently attached to the protected vehicle. In a locked state, the deadbolt shaft extends through a cross-drilled ventilation hole or slot on the brake rotor of the vehicle, thereby preventing rotation of the brake rotor and the wheel. The lock mechanism preferably prevents any forward or rearward movement of the vehicle when engaged to allow for a heightened security for any vehicle using a disc braking system. In one embodiment, the lock mechanism is mechanically actuated. In another embodiment, the lock mechanism is electronically actuated.

Abstract: A locking assembly for locking a cover over an opening of an enclosure includes a mounting bracket including a first wall having opposing first and second ends, a second wall joined to said first end and extending in a first direction away from the first wall. A stud joined to the first wall extends in a second direction away from the first wall. Hooking structure extends from the second wall of the mounting bracket for extending into the opening of the enclosure and engaging the enclosure to secure the mounting bracket relative to the enclosure. A locking bracket includes a first wall having opposing first and second ends and a first surface facing the first wall of the mounting bracket. A second wall is joined to the first end of the mounting bracket and extends in a first direction away from the first wall of the locking bracket. In one embodiment, a lock housing is fixed to the first wall of the locking bracket.

Abstract: An improved door lock of a cargo container having a burglarproof function is disclosed. The door lock includes a handle hub, in which supporting pieces are integrally formed, welded to a locking rod, a rear supporting piece of the supporting pieces having a fastening hole, a front supporting piece of the supporting pieces integrated with an inward locking protrusion having a screw coupling groove, a handle including a connecting part and having a locking recess with a fastening hole such that the inward locking protrusion of the front supporting piece is inserted into and locked in the fastening hole due to pivot of the handle, and a bolt fastened into the screw coupling groove through the fastening hole of the rear supporting piece. Therefore, robbery is prevented and tamper-evident is easily checked during transfer of the cargo container so that measure against the tamper-evident can be easily taken.

Abstract: A lock device includes a lock head, a lock case, a cap, and a lock shaft unit. The lock head is inserted into the lock case. The lock case is provided with an anti-dust cover which is rotatable with respect to the cap. The lock shaft unit is pivotally connected to the lock case, allowing the lock shaft unit to rotate in 360 degrees with respect to the lock case.

Abstract: A multiple function lock comprising a body, an engaging element having a first end and a second end, a locking mechanism for securing the first end and the second end of the engaging element to the body, and a gate mechanism for selectively concealing or revealing a passage in the body through which the second end may move to unlock the lock. In certain embodiments, a multiple function lock may comprise a body, a U-shaped shackle having toe and heel portions, the heel portion rotatably secured within the body, a locking mechanism for locking the heel and the toe portions within the body, a passage through the body adjacent to the toe portion, the toe portion adapted to move through the passage to unlock the lock, and either a retaining cup, an adjustable gate, or an outer housing, each being adapted to selectively block or reveal the passage.

Abstract: A pivotal bar-lock comprising an anchor hasp having a locking hub and a first locking element integrally formed with a first mounting plate; a locking hasp integrally formed with a second mounting plate and having a mating element and a second locking element formed therein; and a locking bar rotatably mounted on the anchor hasp, the locking bar having a cylinder lock encased therein and an engagement element formed therewith, the cylinder lock being operable such that when rotated into an unlocked mode, the locking bar is pivotally enabled to assume one of open, in-transit, and closed positions in interaction with the first and second locking elements, and when the cylinder lock is rotated into a locked mode, the engagement element of the locking bar engages the mating element of the locking hasp.

Abstract: Two embodiments of a guard are provided for protecting a padlock securing stanchion levers in their door locking position. An opening in the front wall of the guard permits its use with padlocks having long shackles as well as those with regular length shackles while retaining the compactness not normally retained for the extended length of the shackles. The preferred construction lock guard has a pitched roof and a pair of legs on its laterally outer sides extending downwardly behind the stanchion lever at laterally opposite sides of the stanchion latching mechanism that increase stability, rigidity of the housing and protection of the latches.

Abstract: A multiple function lock comprising an engaging element and a captive element. The engaging element enters a captive space provided in the captive element for locking the lock. The captive element includes a selectable passage into the captive space for permitting the engagement element to be selectively released or secured. The selectable passage is revealed or concealed through translation or rotation of a blocking element. In certain embodiments, the multiple function lock comprises a body, a shackle having toe and heel portions, a first locking mechanism for securing the heel portion to the body and a separate second locking mechanism for securing the toe portion to the body. The second locking mechanism is operative to engage and disengage the toe portion from the body so the shackle may rotate about the heel portion secured by the body.

Abstract: A lock having a movable shroud for protecting a lock shackle is disclosed. The lock includes a lock body, a locking mechanism attached to the lock body, a shackle and a shroud. The shackle has a first portion disposed within the lock body and a second portion movable between a locked position and an unlocked position. The shroud is attached to the lock body and is movable between a retracted position and an extended position. In the extended position, the shroud covers at least a portion of the shackle that extends beyond the lock body. The lock may include corresponding detents and openings on adjacent lock body and shroud surfaces to guide the movement of the shroud relative to the lock body. A method of use is also disclosed.

Abstract: A locking mechanism for securing the cover of a thin-walled box to the box frame. The locking mechanism includes a clip bracket adapted to engage a wall of the box frame, a lock body adapted to latch to the clip bracket and engage the box cover, a locking member carried by the clip bracket and adapted to clamp the clip bracket to the box wall when the locking member is in a clamping position, and a pivotable actuating lever adapted to actuate the locking member into the clamping position. The locking member and the actuating lever can be implemented as a two-piece system comprising first and second pivoting members. Alternatively, the locking member and the actuating lever can be integrally formed as a one-piece system. The locking mechanism is capable of multiple mounting positions on the box without drilling, and uses a spring-loaded plunger assembly that allows for a quick, keyless, slam installation.

Abstract: Theft-deterrent lock protector apparatus generally encloses and mechanically restricts access to locks which restrict access to receptacles, containers, and/or materials of value, thus providing a second level of security to such receptacles, containers, and/or materials. Such receptacles, containers, and materials include shipping containers, truck bodies, enclosed trailers, and hitch receptacles. Such locks include padlocks, shackle locks, U-locks, hasps, trailer latches, trailer clasps, trailer tongues, receiver hitches, and receiver pins. The locking enclosure apparatus restriction enables a user to secure various objects with such locks and lock protectors while mitigating deleterious and/or nefarious tool access to the locks themselves.

Abstract: A puck shaped lock including a substantially cylindrical body into which a cavity is formed and a movable bolt that passes through the cavity and is shiftable from a first position advanced across the cavity to a second position substantially withdrawn from the cavity and which can be releasably secured across the cavity fixedly connected to and extending from the puck shaped lock and being securable to a door or a door jamb. The invention further includes a hasp member supporting a first staple securable to a door or a doorjamb. When the puck shaped lock is positioned overlying the hasp member the staple is inserted into the cavity and the movable bolt can be advanced across the cavity and through the opening in the staple whereby the puck shaped lock and the hasp member are secured together and the door is locked.

Abstract: A cargo door lock for securing the rear doors of containers such as the rear doors of a tractor-trailer container, a sea-rail container, or a static container. The cargo door lock attaches to vertical rods to prevent unauthorized opening of the container rear doors. The cargo door lock includes an extendable shaft with first and second opposite ends, first and second securing hooks that are respectively attached to the first and second opposite ends, and a lock mechanism. The lock mechanism is set at a perpendicular angle with respect to the first and second securing hooks.

Abstract: A lock box assembly for enclosing and protecting a plastic security seal on the latch assembly of the door on a cargo container or trailer. The lock box includes first and second box members that together form an enclosure for the hasp assembly that holds the seal. Cooperating latch arm slots in the sides of the box members capture the latch arm, thereby securing the lock box to the latch assembly and preventing access to the seal. Aligned holes in the sides of the box members receive a lock pin. This configuration provides a lock box that is simple in design and easy to attach and remove using any conventional lock pin. The box is secured to the latch assembly by capturing the latch arm in the slots, eliminating the need for any structure to pass through the hasps, leaving the seal undisturbed.

Abstract: A lock protector for protecting a padlock of the type having an exposed shackle and body. The lock protector includes a face plate or shield having a member extending from a rear surface that has two openings for securing the shield to the legs of a shackle. The face plate covers the shackle to protect the shackle from access to cutting devices such as bolt cutters.

Abstract: A method and apparatus for locking a container. The present disclosure relates to a lock mechanism which comprises a latch assembly having a rod and an extension including a latch aperture, wherein the extension extends from the rod to position the latch aperture away from the rod. The lock mechanism further comprises a door assembly having a door aperture. Additionally, a support assembly is adjustably coupled to the latch assembly wherein the support assembly includes at least one arm which supports the latch aperture in alignment with the door aperture. The method for locking the container comprises adjustably coupling the support assembly to the latch assembly and attaching the support assembly to mount assemblies which are releasably attached to internal walls of the container. The door is moved to a closed position to position the door aperture adjacent to the latch assembly wherein the extension is in alignment with the door aperture to receive a lock.

Abstract: A locking device includes a shackle member that includes an elongated shank portion, a stop portion on a first end and a latch portion on a second end. A locking head includes a locking mechanism that has an entryway to receive the latch portion and is movable between a locked state to retain the latch portion and a unlock state to release the latch portion. A head cover includes a cover portion that engages the locking head and a flange portion that extends inwardly to define an opening to receive the latch portion therethrough. A seal structure is associated with the inner edge of the flange and sealably engages the outer surface margin of the latch portion. The seal structure may be a margin of the flange portion or a separate O-ring. The lock may be constructed as a lockable hitch pin.

Abstract: A lock assembly for a hinged door has a pair of hasps that align with each other, each having a hole. A housing with an open back fits over the hasps. A retainer pin extends through an aperture in the housing and through the aligned holes of the hasps. The retainer pin has a pair of axially spaced apart shoulders. A key actuated lock member has a lock pin that extends perpendicular to the retainer pin and between the shoulders in an engaged position.

Abstract: A security device is provided for locking a closure such as a door or a gate to an enclosure. The security device is a lock guard for a padlock having a shackle insertable in either a vertical opening or a horizontal opening in a latch component on the closure or the enclosure. The lock guard has a sloping roof for deflecting sledge hammer blows. The sloping roof is preferably a double pitch roof. One embodiment of the invention has two double pitch roofs facilitating its use with both latch parts having vertical openings and latch parts having horizontal openings. Another embodiment of the invention has a single pitch roof.

Abstract: A lock guard is provided which is particularly well suited to protect a padlock employed to secure a stanchion lever securing one or more doors of a cargo container, trailer truck or moving van. The lock guard includes an interior locking tab with a vertical opening through which a hinged leg of a padlock shackle extends when the unhinged leg of the shackle is passed through an opening in a component of the stanchion door and the shackle is closed by abutting it against an abutment on the underside of the roof of the guard. The lock guard, which provides a protective housing or shield for the shackle of the padlock when the padlock is in its installed locking position, is particularly compact thereby minimizing access of cutting tools to the padlock shackle.

Abstract: A padlock comprises: a casing; a shackle having a free first end and a second end, the second end being pivotally connected to the casing; a locking mechanism received within the casing and limiting the axial movement of the second end of the shackle; a latching tube received and operative to be moved within the casing; and a stop member driven by the latching tube so as to be moved between a first position where the first end of the shackle can be rotated by using the second end thereof as a center of rotation, and a second position where the stop member prevents the first end of the shackle from moving, and the shackle and the casing co-define a closed loop.

Abstract: A telltale device (10), securable to a padlock (18) having a key-operated release mechanism, includes a seal (12) to seal a key (20) for the padlock (18) in a lock position in the padlock release mechanism such that removing the key (20) or operating the key (20) to open the padlock (18) damages or destroys the seal (12).

Abstract: A security device is provided for a cargo container having doors hinged on vertical axis, which are locked by vertical stanchions. The locking device includes a housing and a hook. The hook has a pair of vertically spaced claws, which are placed around a stanchion in straddling relation to a pair of parallel brackets to which the stanchion operating lever is pivotally connected. The housing of the locking device has a cross bar which confronts the pivot brackets, thereby preventing rotation of the stanchion when the housing and hook are coupled by a puck lock.

Abstract: A protective cover for cargo seals. The cover has two parts with intermating elements on the two parts, and a pair of apertures that can be aligned in the two parts. When the apertures are aligned a padlock hasp can be passed through the aligned apertures.

Abstract: A lockout safety hasp is provided including a rotational shackle coupled to a top of a body having a U-shaped securing beam extending from the bottom thereof. A slidable cover is received on the body and is moveable between a closed position in which the rotatable shackle is locked in place and an open position in which the shackle is free to rotate. The securing beam is generally U-shaped and provides an opening sized and dimensioned to receive one or more padlocks, the padlocks preventing the cover from moving out of the closed position until all of the padlocks are removed. The components of the lockout safety hasp can be constructed of a plastic or a plastic polymer, and snap fit together to provide an inexpensive and easy to manufacture device.

Abstract: A handle lock is configured for use with a trailer door latch handle. The handle lock is configured to be coupled to the trailer door. The handle lock is used to lock the handle to lock the trailer door in a closed position and to unlock the handle to allow unlatching and opening of the trailer door.

Abstract: An optical security system having a key, an optic lock, and a processing system. The lock generally has a plurality of optic reflective sensors, a plurality of rotatable readable discs, and a controller for processing information to and from the plurality of sensors. The optic security lock senses the surface changes of state during the rotation of the plurality of discs caused by the turning of the fully-engaged key. The data from the sensors is communicated to the controller, with the controller having a processor capable of processing data from the sensors to generate a lock command signal. The lock can include a plurality of detent mechanisms to provide precision interval alignment of the sensors with the rotatable discs to accurately sense the surface changes of state.