Abstract: Pop-Up Indicator, Replacement Lock-Cylinder with distinctive keys for owner, employee (or acquaintance), and some third party whose right to enter is legitimate only upon notice or in an emergency. The pop-up indicators are brightly and differently colored. The lock cannot be circumvented by pressing a pop-up in and endeavoring to turn the key, because the pop-up's barrel blocks rotation of the lock's core unless the pop-up is fully extended. Once triggered, the pop-up remains visible and in locked position until the lock owner resets it. A tactile indicator of sought entry is transmitted to the owner upon key insertion and rotation, as well. Meanwhile, the employee and/or third party enjoys unimpeded access. The owner will thus know whether the employee has been over—to inspect for termites, walk the dog, etc.—and the third party cannot allege lockout lease breaking. The lock operates quite normally with either or both pop-ups triggered.

Abstract: A key operated, lock actuating system having a housing and a lock cylinder that is pivotable relative to the housing around a first axis. An actuator assembly is pivotable around the first axis between a fully locked position and an unlocked position. The lock actuating system includes a first key having a first configuration and a second key having a second configuration. The first key can be used to change the actuator assembly between the locked and unlocked positions. The second key, which cannot be fully inserted to be operable with the actuator assembly in the locked position, can be used to change the actuator assembly between the unlocked position and an intermediate locked position.

Abstract: An attachment for a door of a safety deposit box cubical for modifying its locking system wherein the locking system comprises a flange forming a part of one of the bank keys extending laterally of the key and anchored to the door for providing access to a safety deposit box by merely using a second assigned key.

Abstract: By operationally mounting a plurality of wafers or plates forming tumblers in an independent, separate, substantially closed container, and cooperatively mounting the plate tumbler container with a cylinder forming member, a unique cylinder lock system is attained which is easily and inexpensively manufactured, as well as quickly and easily re-keyed whenever desired. In the preferred embodiment, all of the plate tumblers which are desired for the particular lock construction are mounted in the substantially closed container, with each plate tumbler having the requisite spring means associated therewith. In addition, the plate tumbler holding container incorporates one aperture for each plate tumbler which allows the slot engaging fin of each tumbler to extend outwardly from the container for locking and unlocking association with the housing.

Abstract: A method and apparatus for accessing a safe deposit box stored in a vault. The safe deposit box includes a customer lock and a bank lock, each of which must be opened to access the box. Apparatus is provided to permanently maintain the bank lock in an open position and to enable a customer to enter the vault without requiring the assistance of a bank teller.

Abstract: A security device for obscuring an opening defined by a frame (100) is provided comprising a door panel portion (1) forming at least a part of a door which, in use, is supported relative to the frame. The door panel portion has a front face and a rear face and an aperture provided therein, a lock retaining member (2) having a first lock receiving aperture (6) provided therein and a second lock receiving aperture (7) provided therein. Each lock receiving aperture is adapted to receive a lock and the lock retaining member is adapted to be secured to the rear face of the door panel portion in at least a first and a second position and in which first position the first and second lock receiving apertures are visible through the aperture in the door panel portion, and in the second position only one of the lock receiving apertures is visible through the aperture.

Abstract: A lock with a keyed removable plug having a substantially cylindrical body, and a plurality of tumblers disposed within the body and movable between a first position retracted within the cylindrical body of the plug and a second position with one end extending from the body. A retaining tab extends radially from the plug body at an angle from the radial orientation of the tumblers. A shell has a substantially cylindrical opening therein for removably receiving the plug in a first shell end. The shell further includes an annular shoulder spaced from the first shell end and engageable by the plug retaining tab and a retaining one of the tumblers when in its second position. Tumbler grooves extend axially along the sides of the shell opening from the first shell end to a groove end short of the shoulder, and a release groove extends axially along the shell opening from the first shell end to the shoulder to define an opening in the shoulder.

Abstract: A lock mechanism has at least one tumbler pin having one or more slots in the tip surface of the pin and a key blade which is formed with a projection extending from the surface of the bitting area. The tumbler pin can be rotatable in such a manner that it will seek to accommodate the projection on the surface of the key and to match the surfaces of the key and tumbler pin tip, thus aligning the tumbler pin at a position predetermined by the key bitting. In this regard, the tumbler pin tip is preferably tapered and adapted to engage with a key having a complementarily shaped bitting surface, i.e., complementary to the tapered surface of the tumbler pin tip, such that the tumbler pin will seek to accommodate the tapered surface of the key bitting to align the tumbler pin at a proper position. Alternatively, the tumbler pin can include a projection or the like to inhibit rotation of the tumbler pin.

Abstract: The present apparatus provides an adjustable key-type spring pin lock cylinder. The spring pin lock cylinder includes a lock core (1), a first core sleeve (2), and a second core sleeve (3). At the rear section of the lock core, two depressions, each with a countersink on one side, are made. Two steel balls (4) are respectively placed into the depressions. On the rear cover (5) of the lock, there are two through-holes in which the press rods (6) and the springs (7) are placed. By turning the adjusting lever (10) on the supporting stand (9), either key may be selected to open the lock or only one of the two keys can open the lock.

Abstract: A door lock device that includes a lock body having a plurality of latch bolts, a key holder cylinder having one cylindrical key plug and lock lever for each latch bolt. The components are fastened together by two long shaft bolts from a lever body side, so locking and a releasing are available only by operation of keys or levers equal in number to the number of cylindrical key plugs or only by identical keys.

Abstract: An exit door has a security device comprising a flexible member, e.g. a chain, for connecting two locking devices which may be fixed on a door and doorway or on double doors. The first locking device is operable by a first key removable only when the locking device is activated and a second key removable only when the locking device is deactivated. One end of the flexible member is fixed to the second key and the other end is fixed to the second locking device, which is operable by the second key, being removable from the second locking device only when it is activated, and by a third key removable only when the second locking device is deactivated. The security devices are members of a series of such security devices in which the third key of each security device serves as the first key of the next security device in the series. The last key in the series is essential to operation of a control unit permitting use of a building provided with the exit door.

Abstract: A rekeyable look includes at least one chamber housing a tumbler pin stack having a master pin disposed between the driver pin and the bottom pin. The bitting of a change code key inserted in the keyway displaces the tumbler pin stack containing the master pin such that the interface between the master pin and the bottom pin is placed on the shear line defined by the cylinder shell and plug. Rotation of the change code key aligns a first slot on the change code key with the master pin wherein the master pin is received by the first slot. The master pin is carried with the change code key on removal of the key from the keyway. A replacement master pin disposed in the first slot is inserted into the keyway with the change code key. Rotation of the change code key aligns the replacement master pin with the drive pin.

Abstract: A secure entry system makes use of radio transmissions to communicate with locks, keys, and related components throughout the system. The radio transmissions can be made using a paging system, a cellular telephone system, or any other RF carrier. Some embodiments employ a cellular telephone in lieu of an electronic key. Others integrate a paging receiver within an electronic key to provide a unit with dual functionality. The system is illustrated with reference to exemplary applications in the industrial site security, real estate lockbox, and transportation fields.

Abstract: The locking system includes a blocking and electronic releasing device by means of different codes for each one of the keys, it also being possible to modify the memory of the control circuit by means of an operating key to refuse access to a lost key, also allowing access to other new copies of the key. This electronic blocking is done by means of an independent pin of the locking pistons of the mechanical part of the cylinder, the latter being inside as well as outside the same. The key (4) communicates to the cylinder (1) its code by means of an electric contact (9) through which the energy required for its operation will be supplied to it. The transmission of data of the key to the cylinder is done by the electric contact itself (9). A rotary-type electric motor (10) acts on a blocking pin (6) by means of an eccentric (11) and connecting rod (12.) The control circuit of the cylinder (1) has a memory in which the codes of the keys (4) that have access to the lock appear.

Abstract: A lock assembly having a key plug with an axis, a first housing defining a receptacle for the key plug and guiding movement of the key plug in the receptacle around the key plug axis, a latch assembly including a first movable latch element, structure cooperating between the first housing and the latch assembly for supporting the latch assembly in an operative position on the first housing wherein the first latch element is movable between first and second positions relative to the first housing, a retaining element, structure for mounting the retaining element to the key plug for movement relative to the key plug between first and second positions, with the key plug being movable into the key plug receptacle to an operative position and removable from the key plug receptacle with the retaining element in its first position, and structure cooperating between the retaining element and latch assembly for preventing withdrawal of the key plug from the first housing receptacle with the key plug in its operative p

Abstract: A key 20 is formed with a blade 22 having six bits 30, 32, 34, 36, 38 and 40 formed along one edge of the blade. A shoulder 42 is formed on a trailing end 28 of blade 22 and is positioned to cooperate with a front face 82 of a plug 50 of a five-pin cylinder lock 46 to locate bits 30, 32, 34, 36 and 38 adjacent five respective sets of tumbler pins in the operation of the lock. Key 20 can also be used with a six-pin cylinder lock 110. Shoulder 42 is moved through a slot 130 in a front face 134 of a plug 114 of lock 110 and engages a stop surface 132 whereby bits 30, 32, 34, 36, 38 and 40 are properly positioned adjacent six respective sets of tumbler pins in the operation of the lock.

Abstract: A safe-deposit box uses a lock using a tongue, a first mechanical device, a second mechanical device, an electromagnetic valve, a control unit and a keypad. A renter's key drives the first mechanical device from a first position to a second position for actuating the control unit. The electromagnetic valve is in a first position for retaining the first mechanical device in the second position. A code is input through the keypad to the control unit for driving the electromagnetic valve from the first position to a second position for allowing movement of the mechanical device from the second position to a third position for retracting the tongue. A clerk's key can drive the second mechanical device from a first position to a second position for driving the electromagnetic valve from the first position to the second position and turning off the control unit.

Abstract: A cylinder lock includes a lock shell which confines a cylindrical hole and a rotatable cylindrical key plug provided within the hole of the lock shell and formed with a longitudinally extending keyway. The key plug is further formed with a plurality of first bores which receive a lower tumbler pin of a respective first tumbler set, while the lock shell is further formed with a plurality of second bores which receive an upper tumbler pin of a respective first tumbler set. A plug retaining sleeve has a front portion which extends into the hole of the lock shell and which confines a hollow space for receiving a rear portion of the key plug. The rear portion of the key plug and the front portion of the plug retaining sleeve are respectively formed with third and fourth radially aligned bores which receive a lower tumbler pin of a second tumbler set.

Abstract: A core lock assembly which is operable by two differently bitted keys is disclosed. The core lock assembly includes a shell defining a hollow portion for receiving a core which is capable of rotating to a first position under the control of a first key and to a second position under the control of a second, differently bitted key. The core lock assembly also includes a core rotation mechanism housed in the core for changing from a locked state to a first core rotatable state when the core rotation mechanism is engaged by the first key and for changing from the locked state to a second core rotatable state when the core rotation mechanism is engaged by the second key. The inner surface of the shell defines locking, first and second surface areas for cooperating with the core rotation mechanism.

Abstract: A lockable lock is disclosed, particularly for drink distribution trolleys in aircraft, comprising an additional latch (20) for locking the sliding bolt (7) whose movement is dependent on the pivoting movement of an operating and unlocking lever (8) which also displays, through the aperture (13), the provisioned state of the trolley, the lever (8) being actuated by a key fitted on its shaft (9).

Abstract: A rekeyable lock which includes a master lock activated by a master lock key, a rekeyable lock adjacent the master lock having a lock mechanism activated by a keyable lock key, and structure operably extending from the master lock to the rekeyable lock for changing the length of the lock mechanism within the rekeyable lock so that a different rekeyable lock key can be utilized to operate the rekeyable lock.

Abstract: A method and replacement plug for cylinder locks converts locks having special keyways requiring correspondingly warded key blanks into a universal keyway lock that can be properly operated by a multiplicity of differently warded keys.

Abstract: A locking device consisting of key (2) and locking cylinder (1), in particular for the actuation of electric microswitches on keyboards, telephone or the like, has a locking cylinder housing (5) and a cylinder core (11) arranged for rotation in the bore thereof and cooperating with tumblers (16). The key (2), which has a stepped-down key shaft (35) is insertable into the cylinder core which has a head plate (12), coming after a specific rotation to rest against stops of the locking cylinder housing (5). In order to obtain a simplified construction with increased security and small structural length, there is a free space between the head plate (12) of the cylinder core (11) arranged on the front side of the locking cylinder (1) and the head end (14) of the locking cylinder housing (5). Into the free space the key-shaft shoulder (37) enters, and one or more stops of the locking cylinder housing (5), are arranged at different distances from an axis of rotation of the core.

Abstract: A cylinder lock (1) has a standard lock mode (12 o'clock position) and a service lock mode (10 o'clock position). If the lock plug is turned to the service lock mode with the standard key (8) and left in this position, the plug can be rotated with the aid of the service key (9). The service key is latched against withdrawal, when the lock is in its standard mode. The plug can be displaced axially through a distance of about 0.9 mm, after inserting the standard or service key. A latching device (22) prevents axial return movement of the plug when an attempt is made to remove the service key with the lock in its standard lock mode. This can avoid unintentional jamming of the lock in the standard mode.

Abstract: A lock arrangement which includes a lock casing (5), a key-operated cylinder lock (1) mounted on one side of the casing, and a knob or finger-turn mechanism (7-10) mounted on the other side of the casing, this knob or finger-turn mechanism being effective in activating a lock mechanism activator device, such as a follower (6) located in the lock casing (5), through the intermediary of a cylinder-lock dogging element (4) and a knob dogging element (8). The cylinder-lock dogging element (4) and the knob dogging element (8) are axially movable and are in end-to-end connection with one another. When the knob or finger-grip is turned to secure the lock, the knob dogging element is moved axially in a direction which causes the cylinder-lock dogging element also to move in its axial direction, to a position which prevents a standard key from being inserted fully into the cylinder lock.

Abstract: A cylinder lock is adapted to be re-keyed by a change key which, as an incident to turning a plug in a cylinder, shifts a shuttle transversely of the cylinder. The shuttle carries three sets of drive and master pins which may be selectively brought into active position relative to the plug by shifting the shuttle transversely.

Abstract: A nose plug puller for a Mosler type lock allows the nose plug to be pulled without damaging the nose plug or the lock, thereby saving time and cost. A key pin is inserted in the key slot and rotated until the end thereof is out of registry with the key slot. The key pin is then shifted radially outwardly to allow a pull shaft to be inserted in the key slot. The key pin is then shifted toward the center of the nose plug into force transmitting engagement with the pull shaft. An outward force is applied to the pull shaft and, acting through the key pin, pulls the nose plug out of press fit with the cam operating the wafers.

Abstract: A double-acting locking device of the axial pin tumbler type for joint control. A rotary plug, a control plug, a master plug and a stationary plug fit in contact with each other within a cylinder. Connections and disconnections between those plugs are effected by the actions of top pins, master pins and bottom pins, all of which fit into axial pin holes formed in those plugs and are spring-biased forward. The selection of the connections and disconnections of the plugs is effected by a first key, a second key, and a master key. The rotational directions and angles of the actuating shaft set by the first and second keys are controlled by the actions of front and rear face projections on the control plug, a rear face recess of the rotary plug, and a front face recess of the master plug.

Abstract: A cylinder lock (1) has a normal locking mode (12 o'clock position) and a service locking mode (10 o'clock position). When the cylinder plug (3) is left in the service mode of the lock, with the aid of a standard key, the lock can be turned with the aid of a service key (9). The service key is latched against withdrawal in the normal mode of the lock, by means of an intermediate pin (7') of larger diameter than a corresponding upper pin (4) in the normal mode of the lock. The intermediate pin can be received in a widened part (3b') of a corresponding pin-channel (3a') in the cylinder plug, but is unable to enter the pin channel (2a) of the cylinder housing of smaller diameter, hence latching the service key (9). Subsequent to using the service key (9), the cylinder is returned to the normal locking mode (12 o'clock position) with the aid of the standard key, whereafter the lock can only be opened with the aid of the standard key.

Abstract: A lock is disclosed having a lock barrel with an opening and a key plug rotatable within the opening. The plug is rotatable between first and second operative positions and a third position in which the plug can be withdrawn from the barrel. A tab on the plug abuts a barrel shoulder to hold the plug in the barrel except when the plug is in the third position, where the tab is aligned with an axial slot to permit axial withdrawal of the plug from the barrel. At least one tumbler is adapted to lock the plug against turning, and another tumbler is adapted to prevent the plug from turning to the third position and to allow rotation between the first and second positions. One key operates the one tumbler to permit rotation between operative positions and a second key operates the other tumbler to permit axial withdrawal of the plug from the barrel.

Abstract: A pneumatically-operated unlocking system suitable for use on the door of a igh security building such as a military weapons storage structure, in which each one of a pair of unlocking keys is provided with a different combination of holes and no holes arranged in an n-position pattern to define an n-bit binary code. An encoder outside of the building pneumatically reads the said binary codes on the two unlocking keys in sequence and transmits the resulting pneumatic binary codes through conduits in the building walls to a logic device inside thereof where the binary codes are compared to two n-bit reference pneumatic binary codes derived from a pair of reference keys located inside of said building. If the codes on the two unlocking keys match those on the reference keys, a pneumatic output is produced which can be used to unbolt the door from the building.

Abstract: Two control rings (29a, 29b) are arranged between the cylinder (2) and lock body (1) which are provided with latch grooves (9) receiving that part of the latch (8) which prevents cylinder (2) rotating. The rotor housing has a latch channel (11) formed along the chord of the magnetic body (5) in the rotor (6) and can receive the other part of the latch (8) in a state of magnetic equilibrium determined by the magnets in the key (3) and the magnetic body (5). When a proper key (3) is fitted into the keyhole (10), the latch channel (11) is arranged partly in the rotor (6) housing and partly in the rotor support (4): in this position the cylinder is freely rotatable. When the proper key (3) is removed, the latch channel (11) in the rotor housing is outside the line of action of the latch (8), the latch (8) being arranged in the rotor support (4) and in the latch grooves (9) of the control rings (29a, 29b).

Abstract: A key retaining multiple lock mechanism, suitable for parcel lockers and other structures and capable of being mounted on doors for such structures, has a first lock with a first key trapping tumbler mechanism. The first lock has a strike-engaging tongue and a spring loaded bolt cooperating with a second lock dead bolt structure. The dead bolt is operated by a second key to extend and retract the dead bolt. When extended, the dead bolt compresses the spring-loaded bolt when the mechanism is in a locked condition and acts as a stop when the mechanism is in the unlocked condition, preventing relocking of the structure without first retracting the dead bolt with the second key.

Abstract: A multistation lock including: a housing; a plug rotatable in the housing between a lock position and first and second stations; a keyway in the plug; locking tumbler means for coupling the plug and housing and being biased into a locking position and being movable to a shear position by a proper key in the keyway; and a code track in the housing, the track having a different code segment for each station for engaging a code section of a key shoulder, including a first code segment for the first station for enabling a first key having a code section receivable by the first code segment to move between the lock position and the first station, and a second code segment for the second station for enabling a second key having a code section receivable by the second code segment to move between the lock position and the second station.

Abstract: The invention relates to a master-key piston lock comprising a cylindrical rotor pivoting in a bore of a stator, the said stator comprising radial holes opening into the said bore and in each of which there slides a stator piston spring-loaded towards the said bore, the said rotor comprising an axial key passage into which there open radial holes open at their other extremities at the peripheral surface of the rotor, a right circular-cylindrical rotor piston sliding in each of the said radial holes of the rotor and a key equipped with coded notches co-operating each with the inner extremity of one of the said stator pistons in such manner that the outer extremity of each of the rotor pistons is flush with the peripheral surface of the rotor.The rotor pistons comprise a shoulder with which there can co-operate the notches of a master key.

Abstract: The present invention relates to a pin tumbler cylinder lock comprising an outer cylinder, an inner cylinder rotatably arranged in a cylindrical opening in the outer cylinder, a key-way intended for a key and at least two rows of parallel bores arranged in the outer cylinder, in which bores spring loaded tumbler pins are slidably arranged. The at least two rows of bores have different number of bores, whereby the key will be prevented from retraction in one or more angular position of the inner cylinder. The present invention relates further to a key for such type of locks, the key having notches along its edge, the depth of which being interrelated with the length of the bottom tumbler pins. At least the notch at the extreme end of the key is removed, whereby the key may be retracted in both positions.

Abstract: A lock assembly has a tubular secondary lock housing having an inner wall generally centered on an axis and formed with an axially extending and inwardly open groove. A core plug is rotatable in this housing and has a central axially extending and open key-receiving passage. Axially spaced tumblers are exposed at this passage in the plug and are diametrally displaceable therein along a diametral plane between outer positions projecting radially beyond the outer surface and inner positions lying radially within the outer surface. These tumblers are only displaceable into the outer positions when they are radially aligned with the groove and when they are in the outer position and engaged in the groove they block the core from rotating in the housing. The tumblers have respective control edges subdivided at the diametral plane into first edge regions and second edge regions which are out of line with each other.

Abstract: A magazine for a cash dispensing machine including a lock which can be activated at a loading station to trip if later tampered with thereby to prevent installation of the magazine.

Abstract: A tubular lock housing receives a core plug which is rotatable in the housing about an axis between a pair of angularly offset unlock and antitheft positions and through an intermediate lock position. Pluralities of first and second tumblers are exposed at the key-receiving passage of the plug and are diametrally displaceable therein between outer positions lying radially within the outer surface of the core. Differently bitted first and second keys are engageable in the key-receiving passage with the respective tumblers to displace them into the inner positions. At least one inwardly open first recess is formed in the inner wall of the tubular lock housing in radial alignment with the first tumblers only in one end position of the plug, so that these tumblers engage in the first recess when in the outer positions and thereby prevent angular displacement of the plug from the unlocked position.

Abstract: A lock cylinder with a rotatable cylinder core, which cylinder core has the key channel and is rotatable up to fixed abutment positions, the cylinder core being provided with tumbler core pins to which there are coordinated housing pins, the latter being arranged in bores of the cylinder housing. The rotation abutment of the cylinder core is formed by a core pin which is controllable by means of the key, the core pin entering into a slot open in the direction of the core. The base surface of the slot comprises several partial sections which are arranged at different radial distances, each partial section respectively being off-set step-like with respect to each other.

Abstract: A rotary cylinder lock with a lock cylinder rotatable in a casing, preferably a door handle housing of a motor vehicle, with the lock cylinder being pivotable into closed and open positions by at least one key associated therewith and insertable in the lock cylinder. The rotary cylinder lock is constructed such that a second key can be inserted into the lock cylinder with the second key having, at a location other than in cases of the main key, notches or projections or the like controlling additional locking members. The second key actuates, by pivoting, a switching unit which, if necessary, triggers a safety device so as to prevent unauthorized use of the motor vehicle.

Abstract: A lock arrangement is provided which may be actuated by two different keys. A master key may be used to lock and unlock the device. A subordinate key may be used to lock the device only. The lock is of the pin-tumbler type in which the lock's rotatable core plug includes a shallow, longitudinal step groove cut into the top of the core plug. The subordinate key is identical to the master key except that one or more of the subordinate key's bittings is cut deeper than the corresponding groove or grooves on the master key, the additional depth corresponding to the depth of the step. When the master key is inserted in the keyway in the core plug, the pin tumblers are raised in the normal fashion so that the tops of the pins are even with the shear line between the core plug and the cylinder. The core plug may then be rotated in either direction.

Abstract: A theft-prevention system for a motor vehicle wherein at least one cylinder lock having a closing cylinder and a switching mechanism that is relatively translatable with respect to the closing cylinder for actuating and deactuating the cylinder lock is engageable by a first key which is able to actuate and deactuate only the cylinder lock, and a second key which is engageable with the cylinder lock for actuating and deactuating both the closing cylinder and at least one auxiliary system for deterring the theft of the vehicle. Actuation of the auxiliary system by the second key engages a locking mechanism preventing operation of the cylinder lock.

Abstract: A lock system comprising (1) a first standard size pin-tumbler lock mechanism, such as is used, for example, in an exterior apartment door; (2) a second pin-tumbler lock mechanism substantially smaller in size than the first lock, such as is used for securing an apartment house mailbox; and (3) a key having conventional handle and shank portions, a first set of notches and projections extending along one longitudinal edge of the shank portion such that the key, when properly inserted into the barrel of the standard lock mechanism, will render it operable, and a second set of notches and projections extending partially along the opposite longitudinal edge on the shank at its outer extremity such that when the key is properly inserted into the barrel of the smaller lock mechanism, it will also be rendered operable.

Abstract: A plate tumbler-type cylinder lock mechanism includes a plurality of longitudinal internal splines therearound adapted for receiving tumbler ends, means providing at least three internal circumferentially extending tumbler movement paths on the barrel and extending between one spline and another spline which is different for each path, a key plug assembly rotatable in the barrel and including a key plug and a plurality of spring-pressed plate tumblers mounted in the plug, the tumblers being mounted for reciprocal transverse movement upon insertion and withdrawal of a bitted key with opposite tumbler ends projecting alternately from opposite sides of the plug, certain tumblers being adapted to be projected outwardly with their ends in respective registering movement paths when a key is inserted, whereby such ends may travel in the movement paths when the plug is rotated, and means adjacent to at least one end of each movement path adapted for engagement with the tumbler end traveling in the path to prevent tra

Abstract: A double-barrel double-plug cylindrical lock is provided for hotels, and the like, where changes of occupancy frequently occurs. The lock cylinder is constructed to be of approximately the same size and shape as the prior art lock cylinders, so that the lock of the invention may readily be mounted into existing mortise door hardware to replace existing cylindrical locks. One plug of the lock is intended to be operated by the guests' key; and the other plug is intended to be operated by the maid's key, by an emergency key and by a program key. The guest key may be used to turn the guest plug to a resettable position in which a new guest key may be inserted which sets the guest plug to accept the new key. However, the lock is constructed so that the guest plug cannot be turned to its resettable position unless the emergency key or program key is first inserted in the other plug to turn the other plug to a particular angular position in which the guest plug is able to be turned to its resettable position.

Abstract: A lock has a lock cylinder provided with a rotatable core which is normally prevented from rotating by drivers that bridge the shear line between the core and the main body of the cylinder. However, when either first or second keys are inserted into the core, pins within the core are elevated to the shear line so that the drivers no longer prevent rotation of the core. The main body of the cylinder also contains a push rod which is urged into the core by an actuator when the actuator is energized, but is otherwise located out of the core with its inner end flush with the shear line. The core also contains a pin which aligns with the push rod. The first key is incapable of moving the push rod out of the core so that the core may be turned with the first key only when the actuator is de-energized. The second key, however, forces the pin associated with the push rod against the push rod and moves the push rod outwardly to the shear line, even when the actuator is energized.

Abstract: A cylindrically shaped lock structure adapted to receive an associated rod-shaped key is disclosed. The lock comprises a rotor case having an annular rotor member disposed therein. The rotor member contains a plurality of slidable pin members radially extending into a central key opening in the rotor member. The key opening is arranged and configured to receive the associated rod key such that when the rod key is inserted, the pin members retract into the rotor case and selectively render the rotor movable therein. A latch actuating system is coupled to the rotor member via an arm member whereby rotation of the rotor member causes the actuating system to render a latch movable from its initially closed position to an open position.

Abstract: A security apparatus including a cylinder lock with an actuator plug rotatably mounted within a hollow cylindrical housing. Retained by the actuator plug are a plurality of locking wafers that are spring biased into a locking spline formed in the inner surface of the housing so as to retain the plug in a locked station. Also retained by the plug is a directional wafer, spring biased in a primary position wherein it permits both clockwise and counterclockwise rotation of the plug from the locked station and movable into either intermediate or auxiliary positions wherein it allows clockwise rotation but prevents counterclockwise rotation of the plug. A control key is bitted so as to pull the locking wafers into shear positions and to draw the directional wafer into its intermediate position permitting rotation of the plug to a second station. Also defined by the housing is a tumbler stop that establishes a third operational station located between the locked station and the second station.

Abstract: A security apparatus including a cylinder lock with an actuator plug rotatably mounted within a hollow cylindrical housing. Retained by the actuator plug are a plurality of locking wafers that are spring biased into a locking spline formed in the inner surface of the housing so as to retain the plug in a locked station. Also retained by the plug is a first directional wafer, spring biased into a quiescent position wherein it allows counterclockwise rotation of the plug from a locked station but prevents clockwise rotation thereof and movable into an active position wherein it allows either clockwise or counterclockwise rotation of the plug. A second directional wafer is spring biased in a primary position wherein it permits both clockwise and counterclockwise rotation of the plug from the locked station and movable into an intermediate position wherein it allows clockwise rotation but prevents counterclockwise rotation of the plug.