Removable Change Element Patents (Class 70/385)
  • Patent number: 8707746
    Abstract: A lock includes a housing having an axial space and multiple radial top pin holes. Multiple through holes are defined through the housing and located corresponding to the space. A core is located in the space and has multiple radial bottom pin holes which communicate with the top pin holes respectively. A key hole is defined in the first end of the core and a connection member is connected to the second end of the core. The key hole communicates with the bottom pin holes. The housing has a connection portion located corresponding to the connection member. The through holes are located alternatively to the bottom pin holes. When the bottom pin holes are rotated to the through holes and the core moves axially, the connection member is connected to the connection portion. The through holes communicate with the bottom pin holes.
    Type: Grant
    Filed: January 28, 2013
    Date of Patent: April 29, 2014
    Assignee: Federal Lock Co., Ltd.
    Inventor: Tien-Kao Liu
  • Publication number: 20140069156
    Abstract: A rekeyable lock cylinder includes a cylinder body and a plug assembly, which includes key followers normally biased for linear movement into a home position. Locking bar interfaces in the plug assembly are rotatably connected to respective key followers for simultaneous linear movement with the key followers, and are movable from a non-rotatable to a rotatable position within the plug assembly. Each interface defines a plurality of angularly-spaced unlocking cavities alignable with a locking bar operatively associated with the cylinder body and plug assembly. When the user causes the interface to move into the rotatable position, it can be rotated to re-align any or all of the unlocking cavities with the locking bar. Inasmuch as each unlocking cavity is also associated with a particular elevation of the interface's respective key follower, re-aligning one or more such cavities resets the respective elevations of the key followers so that they can accept only a different valid key.
    Type: Application
    Filed: August 1, 2013
    Publication date: March 13, 2014
    Inventors: Oscar Romero, John C. Charnley
  • Patent number: 8291735
    Abstract: A rekeyable lock cylinder includes a lock cylinder body having an interior void and a plug assembly rotatably disposed in the lock cylinder body. The plug assembly includes a plug body having a keyway. A plurality of racks is movably disposed relative to the plug body. A plurality of key followers is positioned across the keyway and is moveably disposed relative to the plug body. Each key follower is configured to engage a respective rack of the plurality of racks. A key follower rotation member is drivably engaged with each key follower of the plurality of key followers. The key follower rotation member is selectively movable to rotate each key follower of the plurality of key followers to thereby disengage each key follower of the plurality of key followers from the respective rack of the plurality of racks to facilitate a keying of the rekeyable lock cylinder.
    Type: Grant
    Filed: March 31, 2011
    Date of Patent: October 23, 2012
    Assignee: Newfrey, LLC
    Inventor: Gerry Damikolas
  • Patent number: 8074480
    Abstract: A rekeyable lock cylinder with fool-proof function at least comprises a cylinder body, a plug, a limit member, a sliding block and a drive member. The plug disposed within the cylinder body has a trench, a plurality of first rack component runners communicating with the trench and a first through hole also communicating with the trench. The limit member is disposed within the first through hole and the sliding block is disposed within the trench. The sliding block has a plurality of second rack component runners respectively corresponding to each of the first rack component runners, a keyhole communicating with the second rack component runners and a second through hole communicating with the keyhole. The second through hole corresponds to the first through hole of the plug. The drive member is disposed within the second through hole and one end of the limit member contacts against the drive member.
    Type: Grant
    Filed: October 29, 2008
    Date of Patent: December 13, 2011
    Assignee: Taiwan Fu Hsing Industrial Co., Ltd.
    Inventors: Lien-Hsi Huang, Ping-Hung Hsieh
  • Patent number: 7802455
    Abstract: A key-operated cylinder lock for operating a bolt or a latch, that can be programmed for use with one of a plurality of user keys without disassembling the lock or replacing the tumblers, with reduction or elimination of incidental or accidental re-keying of the lock. The lock has a rotating plug having one or more retainer cavities formed into the periphery, and lock configuration change balls, movable within the lock between a first position within a driver chamber and a second position within a corresponding retainer cavity when the plug is in a programming position. The positioning of the change balls within either the pin chambers or the retainer cavities determines the key configuration that can operate the lock. The lock employs a means for isolating selectively the retainer cavities from the corresponding driver chambers when the plug is in the programming position, to prevent incidental or accidental movement of the change members from the driver chamber into the retainer cavities.
    Type: Grant
    Filed: May 7, 2008
    Date of Patent: September 28, 2010
    Assignee: JaNaKa Limited Partnership
    Inventor: Rodrick A. Herdman
  • Publication number: 20100050717
    Abstract: A re-keyable cylinder lock has a control member to permit or restrict transverse movement of a re-keying unit. The control member is movable axially between first and second positions and transversely to a third position from the second position. In the third position, the re-keying unit moves transversely and disengages from first tumbler pieces. A limit member is provided to prevent the control member from moving axially when no right key is inserted into a plug. A security arm is connected to the control member and is breakable so that destructive forces cannot reach the control member.
    Type: Application
    Filed: August 27, 2009
    Publication date: March 4, 2010
    Inventors: Wei-Liang CHIANG, Ju-Lin YANG, Cheng-Chung LIU, Kun-Chen LEE, Song-Gen SHYU, Ching-Chuan KUO
  • Publication number: 20100031717
    Abstract: An interchangeable core lock adapter is disclosed. The interchangeable core lock adapter comprises a body portion including an outer wall and an inner wall. The outer wall is configured and dimensioned for operable engagement within a large format interchangeable core housing. The inner wall configured is and dimensioned for operable reception of a small format interchangeable core lock.
    Type: Application
    Filed: August 4, 2009
    Publication date: February 11, 2010
    Inventors: Alan E. Lurie, Costantino Cafaro
  • Publication number: 20090277233
    Abstract: A rekeyable lock cylinder comprises a cylinder body and a plug assembly disposed within the cylinder body. The plug assembly comprises a plug body, a plurality of assembled pins and a position block. The plug body has a longitudinal axis, a transverse axis vertical to the longitudinal axis, a keyhole and a first through hole. Each of the assembled pins is movably disposed in the plug body and comprises a first rack component and a second rack component selectively engaging with the first rack component. The position block disposed at the plug body has a plurality of pin runners used for disposing the first rack components, a second through hole corresponding to the first through hole and a tool-contacting surface located within the second through hole. The position block can move along the transverse axis-direction of the plug body to make each of the first rack components reengage with each of the second rack components.
    Type: Application
    Filed: April 29, 2009
    Publication date: November 12, 2009
    Inventors: Chao-Ming Huang, Chi-Ming Chen
  • Publication number: 20090277236
    Abstract: A quickly rekeyable lock cylinder comprises a cylinder body and a plug assembly disposed within the cylinder body. The plug assembly comprises a plug body, a position block disposed at the plug body, a first rack group and a second rack group. The plug body has a longitudinal axis, a transverse axis vertical to the longitudinal axis and a rekeying tool opening. The first rack group has a plurality of first rack components. The second rack group may push the position block to move and has a plurality of second rack components in engagement with the first rack components and at least one tool-receiving portion pushed by the rekeying tool. The second rack components can move along transverse axis of the plug body to release engagement with the first rack components.
    Type: Application
    Filed: May 12, 2009
    Publication date: November 12, 2009
    Applicant: TAIWAN FU HSING INDUSTRIAL CO., LTD.
    Inventors: Chao-Ming Huang, Chi-Ming Chen
  • Publication number: 20090277234
    Abstract: A rekeyable lock cylinder comprises a cylinder body and a plug assembly disposed within the cylinder body. The plug assembly comprises a plug body, a plurality of assembled pins, a position block and a rotating member. The plug body has a longitudinal axis, a transverse axis perpendicular to the longitudinal axis and a first through hole. Each of the assembled pins is movably disposed in the plug body and comprises a first rack component and a second rack component selectively engaging with the first rack component. The position block is disposed at the plug body and has a plurality of pin runners for disposing the first rack components and a second through hole corresponding to the first through hole.
    Type: Application
    Filed: April 30, 2009
    Publication date: November 12, 2009
    Inventors: Chao-Ming HUANG, Chi-Ming Chen
  • Publication number: 20090217720
    Abstract: A changeable lock assembly suitable for re-keying a lock without disassembly of the lock. The assembly includes a housing having a bore therein, and a plug rotatably mounted in the bore. The plug includes a longitudinal axis and a keyway. The keyway is adapted to receive at least a first user key and a second user key. The lock further includes a change member movable within the lock between a first position to a second position. The change member can move solely in response to operation of the second key. Thus, when the change member is in the first position, the first key operates the lock, and when the change member is in the second position, the first key does not operate the lock. The lock assembly can also employ a change tool that, when inserted into a change slot, can move a change ball from the second position back to the first position.
    Type: Application
    Filed: May 12, 2009
    Publication date: September 3, 2009
    Inventor: Rodrick A. Herdman
  • Patent number: 6021655
    Abstract: An all-in one tool usable by the locksmith in servicing of interchangeable core locks, for lock pin removal and decoding, and lock core repinning and recapping. The tool comprises a body having a central core receiving channel extending therethrough; a plurality of cylindrical bores extending through the body and perpendicularly intersecting the core receiving channel; and a receptacle receiving channel in the body located below and in communication with the core receiving channel; and a removable pin receiving receptacle slidably received in the receptacle receiving channel. The pin receiving receptacle has a plurality of pin receiving pockets extending perpendicularly from the core receiving channel of the body generally in alignment with the cylindrical bores. The pin receiving receptacle may take either of two forms: a hinged form that opens like a book to reveal the captured lock pins, or a solid block form that contains slots in which the captured pins are visible.
    Type: Grant
    Filed: January 26, 1999
    Date of Patent: February 8, 2000
    Assignee: Lab Security Systems Corporation
    Inventors: Robert A. Labbe, Gerald G. Roraback, Jr.
  • Patent number: 5758528
    Abstract: The present invention provides a system of locking the type of lock which has a cylinder constituted by a static body or barrel and by a rotatory body or core, equipped with a multiplicity of radial assemblies or key sequences. The lock contains at least one pair of tumblers mounted against a common impeller spring. The lock sequences of which each operate in relation to respective indentations formed by the tooth-like cutting of the active edge of a key blade. The cylinder for six or five key sequences all of which are spring-loaded. The key corresponding to the cylinder and having corresponding indentations. A removable plug or stop which is selectively placed or removed with respect to the opening at back, is situated farther to the rear of the channel for insertion of the key into the rotatable body or core. The position of the removable plug or stop being such as to displace a step or an amplitude of the distance between the axes of two successive key sequences.
    Type: Grant
    Filed: March 21, 1996
    Date of Patent: June 2, 1998
    Assignee: Talleres de Escoriaza, S.A.
    Inventor: Luis Valdajos Gallego
  • Patent number: 5718136
    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.
    Type: Grant
    Filed: August 31, 1995
    Date of Patent: February 17, 1998
    Assignee: Kaba High Security Locks Corporation
    Inventors: Raymond Aldieri, Jerome V. Andrews, John C. Bergstrom, Thomas J. DiVito
  • Patent number: 5211044
    Abstract: A universal lock and key assembly in which the lock is re-keyable and the key is also changeable. The key has a shank portion having a longitudinally extending tooth slot in its top surface. A plurality of teeth have their bottom ends inserted into the tooth slot in any desired sequence to give a predetermined profile to the teeth of the key. The bottom pin cylinder of the lock has mating bottom pins for each of the respective teeth. These are then arranged in a coordinated sequence in the bottom pin cylinder of the lock. The structure of the system allows an individual to change both the configuration of the key and also the mating structure within the lock so it will be operable.
    Type: Grant
    Filed: January 14, 1992
    Date of Patent: May 18, 1993
    Inventor: Kwon W. Kim
  • Patent number: 5088306
    Abstract: A cylinder lock is capable of providing a changeable keyway by means of elongated warding members which are insertable into a keyway access slot which has a cross-sectional configuration larger than for a desired key. There may be one or more warding members which are insertable into the plug and extend the length of the keyway access lot to define the cross-sectional area of a desired key.
    Type: Grant
    Filed: October 31, 1989
    Date of Patent: February 18, 1992
    Assignee: Medeco Security Locks, Inc.
    Inventor: Peter H. Field
  • Patent number: 5025647
    Abstract: A mechanical card-serviced lock comprises a housing (1), a locking member (2) which is displaceably arranged in the housing, blocking pins (12, 13) which by means of a key card (4) are mechanically movable between positions where they prevent and permit, respectively, relative movement between the locking member and the housing, and means (3, 18) for selectably changing the total length of the blocking pins in order to set the combination of the lock in correspondance with a key card (4) introduced in the lock.
    Type: Grant
    Filed: November 3, 1989
    Date of Patent: June 25, 1991
    Assignee: TrioVing a.s.
    Inventor: Frank Muus
  • Patent number: 4912953
    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.
    Type: Grant
    Filed: September 29, 1988
    Date of Patent: April 3, 1990
    Assignee: National Lock Corporation
    Inventor: Gerald C. Wobig
  • Patent number: 4836002
    Abstract: A lock apparatus includes a lock provided with a cylindrical plug having a set of blind holes angularly spaced from the set of pinways in the plug. A longitudinal slot through the center of the blind holes accepts a programming member that lifts one or more master pins out of the blind holes and into housing pinways when the lock is unlocked with a master key and the plug is rotated into a rekeying position to align the blind holes with the housing pinways. The programming member has a hole or notch near its front end to facilitate removal when the lock is unlocked and the plug is in the rekeying position. The programming member may be in the form of a set blade or a set rod, and may be reversible end-to-end to provide additional rekeying combinations.
    Type: Grant
    Filed: July 1, 1987
    Date of Patent: June 6, 1989
    Inventor: Brian J. Monahan
  • Patent number: 4747281
    Abstract: A lock apparatus includes a key-in-knob lock, padlock or other type of 90.degree. lock provided with a cylindrical plug having a keyway for receiving a master key that has bittings for positioning a master pin in the top portion of a first pinway with the bottom of the master pin aligned with the shear interface to unlock the lock. The plug has a guideway at the surface thereof and angularly displaced from the keyway less than 180.degree. for receiving the master pin during re-keying. A blocking rod is received in the guideway for normal, non-re-keying use of the lock. After removal of the rod from the guideway, a transfer tool is slidable into the guideway. The tool has a cut for receiving the master pin from the first pinway. The tool slides relative to the guideway and moves the master pin in the guideway to directly reposition the master pin adjacent a randomly selected second pinway.
    Type: Grant
    Filed: March 27, 1987
    Date of Patent: May 31, 1988
    Inventor: Brian J. Monahan
  • Patent number: 4712401
    Abstract: A lock apparatus includes a lock provided with a cylindrical plug having a keyway widened to form a slot adjacent the bottom surface of the plug for receiving a master pin from a top pinway of the lock. The slot has shoulders at the opposite ends thereof to prevent removal of the master pin from the lock. If the lock has been assembled, the plug is removed to facilitate forming the slot, removing any ribs that are at the bottom of the keyway and inserting a master pin between the driver pin and the tumbler pin in a first one of the pinways.A transfer key has bittings for positioning the master pin in the top portion of the first pinway with the bottom of the master pin aligned with the shear interface. A transfer tool is slidable relative to the transfer key on the side thereof opposite to the bittings and has a cut for receiving the master pin from the first pinway.
    Type: Grant
    Filed: July 20, 1986
    Date of Patent: December 15, 1987
    Inventor: Brian J. Monahan
  • Patent number: 4691545
    Abstract: A safety lock with gorge levers, intended to be operated by a web-type key, in which the consent stud, connected to the plate with latches and traversing the windows with opposite teeth of the gorge levers, instead of being prismatic as usual, has an outline with projections and recesses depending on the shape of the key web and on the configuration of the windows of the gorge levers, while these latter are identical for locks intended to be operated by different keys, whereby the shaped consent stud is the only element differentiating each specific lock.Preferably the shaped consent stud is interchangeably mounted on the plate with latches, whereby the lock can be easily adapted to be operated by a different key, by simply replacing the interchangeable shaped consent stud.
    Type: Grant
    Filed: March 20, 1984
    Date of Patent: September 8, 1987
    Assignee: SETEC s.r.l.
    Inventor: Amleto Pagano
  • Patent number: 4627252
    Abstract: A coded-card type lock device includes in combination: an outer housing body for being fixed on a door; a locking unit with a sliding slot and a plurality of partitioning spaces installed in the outer housing body; a plurality of mechanically coded locking pieces movably installed in the partitioning spaces according to a selected code; an operating mechanism movably disposed under the locking unit in the outer housing body for unlocking operation; a resetting member slidingly provided around the periphery of the locking unit for resetting the locking unit to a coded lock position; a lock bolt mechanism movably installed at a front portion of the outer housing body in connection with the operating mechanism; an inner covering member secured over the back side of the outer housing body; and a card-type key having a plurality of segmented sections coded according to the code of the locking pieces for effecting the unlocking operation; and a bolt socket frame matched with the bolt mechanism and fixed on a door f
    Type: Grant
    Filed: November 14, 1985
    Date of Patent: December 9, 1986
    Inventor: Chi-Woei Lo
  • Patent number: 4616492
    Abstract: The combination lock is one wherein movable members of the combination mechanism are set in decoding position by a key in the form of a rotatable shaft with a head at one end serving as a handle. Rotation of the key to proper decoding position is determined by shifting an index mark on the key relative to selected units of a set of letters or numerals on the lock housing. The combination mechanism makes use of a multiple number of pairs of discs concealed in the housing which must be successively set in proper decoding position, one disc relative to the other, to release a lock operating plug. In proper decoding position a slide bar, which normally blocks rotation of the lock operating plug, is shifted by key action into openings provided in the discs and out of blocking engagement with the plug, in which position the plug is free for rotation by the key.
    Type: Grant
    Filed: September 7, 1984
    Date of Patent: October 14, 1986
    Inventor: J. David Barfield
  • Patent number: 4539829
    Abstract: A cylinder lock which comprises a housing and, rotatably accommodated therein, a cylinder having an axially extending key slot for reception of, and rotation by, a mating key to unlock the lock. The cylinder is provided on at least one of its ends with an end plate having a similar key slot cut therethrough and means for removably attaching the end plate to the cylinder with the key slot of the end plate in register with the key slot of the cylinder to permit insertion, through the end plate, into the cylinder, of the key, whereby in case of a broken key, the end plate can be removed from the cylinder, thereby exposing a portion of the broken key, facilitating extraction thereof.
    Type: Grant
    Filed: March 22, 1983
    Date of Patent: September 10, 1985
    Assignees: Micha Altmann, Yoel Ben-Yehuda
    Inventor: Benny Givol
  • Patent number: 4531390
    Abstract: A utility cylindrical lock set having a series of pin tumbler bores accommodating a plurality of pin stacks and biasing springs is provided with an improved cap. The external surface of a cylindrical lock body includes a cap-receiving groove crossing the open upper ends of the pin tumbler bores. The sides of the groove are undercut to form overlying flanges. An elongated cap having a central portion to overlie the pin tumbler bores and edge portions offset downward from the central portion is receivable within the groove. The edge portions of the cap project oppositely outward to engage the side flanges of the groove to retain the cap in place in the groove. A small recess is formed in one side of the groove. The elongated cap includes a complementary side protrusion to engage the recess to locate the cap against longitudinal movement in the groove.
    Type: Grant
    Filed: March 2, 1983
    Date of Patent: July 30, 1985
    Assignee: Best Lock Corporation
    Inventors: Walter E. Best, William R. Foshee
  • Patent number: 4531389
    Abstract: A cabinet push lock has a key plug held by a retaining pin engaged in a circumferential groove in the key plug and mounted in a bore coplanar with the pin tumbler bores. The pin tumbler stacks are held in their bores by an elongated cap mounted in a groove closed at the front and extending across both the pin tumbler bores and the retaining pin bore. The cap is held against endwise movement, as by interlocking with the sides of the groove. The groove side walls are staked at spaced areas to releasably retain the cap, and other areas are reserved for subsequent restakings. The retaining pin bore, an aligned diametric bore in the key plug, and a bottom opening in the lock body provide a passage for transmission of thrust to drive a portion of the cap out of the groove to permit cap removal. The diametric bore in the key plug contains a drive pin to block the key slot, and a key stop ahead of the drive pin blocks an additional portion of the key slot.
    Type: Grant
    Filed: December 10, 1982
    Date of Patent: July 30, 1985
    Assignee: Best Lock Corporation
    Inventor: William R. Foshee
  • Patent number: 4461161
    Abstract: A locking device which is operated by an inserted perforated card includes a bolt with rows of bores and a body within the casing of the device corresponding having bores in line with the first named bores and tumbler units located in the aligned bores and selectively displaceable by means of the inserted card.
    Type: Grant
    Filed: September 23, 1983
    Date of Patent: July 24, 1984
    Inventor: David Shpigelman
  • Patent number: 4440009
    Abstract: A rekeyable cylinder lock includes removeable spacers between top and bottom tumbler pins, and a key bit device for removing a spacer from the pin chamber through the key way. The key bit device includes bitting thereon to position the spacer in the top pin chamber and a cut in the opposite side thereof adapted to capture the spacer from the top pin chamber and remove it from the lock. In another embodiment of the invention, a key bit device is provided for placing a spacer into a pin chamber of the lock to rekey the lock. It includes a mechanism, such as a spring, in a cut on the back side of the key bit that is adapted to force a spacer out of the cut and into the pin chamber in the lock.
    Type: Grant
    Filed: December 7, 1981
    Date of Patent: April 3, 1984
    Assignee: Innovative Research Corporation
    Inventor: Jerry R. Smith
  • Patent number: 4412437
    Abstract: A rekeyable cylinder lock includes removeable spacers between top and bottom tumbler pins, and a key bit device for removing a spacer from the pin chamber through the key way. The key bit device includes bitting thereon to position the spacer in the top pin chamber and a cut in the opposite side thereof adapted to capture the spacer from the top pin chamber and remove it from the lock. The spacer is preferably smaller in diameter than the tumbler pins, and the cut is large enough to receive the spacer but too small to receive the tumbler pin. In another embodiment of the invention, a key bit device is provided for placing a spacer into a pin chamber of the lock to rekey the lock. It includes a mechanism, such as a spring, in a cut on the back side of the key bit that is adapted to force a spacer out of the cut and into the pin chamber in the lock.
    Type: Grant
    Filed: September 23, 1982
    Date of Patent: November 1, 1983
    Assignee: Innovative Research Corporation
    Inventor: Jerry R. Smith
  • Patent number: 4359884
    Abstract: The lock configuration described in the parent application enables a dual key lock to operate efficiently, accurately and conveniently with a single stack of tumblers. Also, the individual tumblers of the invention are typically receivable in the lock in a plurality of alternative orientations in which their gates assume different functions, facilitating key changes. The present application discloses means for further improving the precision of gate positioning in such locks, and remarkably simple and economical means for adapting such locks for either right- or left-hand installation.
    Type: Grant
    Filed: January 15, 1981
    Date of Patent: November 23, 1982
    Inventor: James M. Miles
  • Patent number: 4332153
    Abstract: The invention provides an improved lock configuration by which a dual key lock can operate efficiently and conveniently with a single stack of tumblers. That configuration permits more accurate positioning of the tumblers upon key operation, whereby a larger number of key combinations can generally be accommodated. Also, the individual tumblers of the invention are typically receivable in the lock in a plurality of alternative orientations in which their gates assume different functions. That difference of function may constitute a change of effective gate position with respect to the same key, or may shift cooperation with the two keys from one pair of gates to another. That aspect of the invention is useful in facilitating key changes, especially in locks designed for safe deposit and similar service.
    Type: Grant
    Filed: June 4, 1979
    Date of Patent: June 1, 1982
    Inventor: James M. Miles
  • Patent number: 4266415
    Abstract: A door lock, in particular a lock for hotel room doors. Actuation of the exterior door handle creates a supply of compressed air which is directed through a coding assembly to actuate a lock release member. The operation of the coding assembly is controlled by a pair of matching punched cards. One of the cards is normally positioned within the lock and the other card is retained by an authorized user for insertion into the lock to operate the coding assembly. Two separate coding assemblies are provided with a hotel door lock, one being for use by a guest and the other under the control of the hotel management.
    Type: Grant
    Filed: August 6, 1979
    Date of Patent: May 12, 1981
    Inventor: Walter W. H. Clarke
  • Patent number: 4231242
    Abstract: A plug for a key operated lock is provided with a plurality of bores transverse to the key slot formed through the plug. The bores accept studs which extend into the key slot to delimit the design of key blanks from which keys, fitting the lock, can be constructed. The selection of bores to contain studs permits rapid change of key blank designs for the lock.
    Type: Grant
    Filed: October 23, 1978
    Date of Patent: November 4, 1980
    Assignee: U-Change Lock Industries, Inc.
    Inventors: Lewis J. Hill, Bill J. Dillard
  • Patent number: 4149394
    Abstract: Lock apparatus comprising a housing in which is movably supported a locking member for movement between locked and unlocked positions. The housing and locking member have aligned bores containing blocking pins supported for movement between a first position in which the locking member is movable relative to the housing and a second position in which the blocking pins block movement of the locking member relative to the housing. A plate-like key member and a plate-like code member are respectively insertable into slots provided in the housing. The bores in the housing and locking member are arranged in a predetermined pattern and the plate-like members have respective regions corresponding to the location of the bores in the pattern.
    Type: Grant
    Filed: March 28, 1978
    Date of Patent: April 17, 1979
    Assignee: Elkem-Spigerverket A/S Troiving
    Inventor: Tor Sornes
  • Patent number: 4114410
    Abstract: The invention relates to an improved device for opening a lock and a means for actuating the device. The device is characterized by a moving plunger or rotating wheel which is provided with slots which mesh with at least two rocking tumblers which engage the slots when they are biased by a reference card and thus prevent movement of the plunger or wheel. The rocking components can be disengaged from the slots when they in turn are biased by the proper keycard, thereby freeing the plunger or wheel and allowing operation of the mechanism of the lock.
    Type: Grant
    Filed: September 26, 1977
    Date of Patent: September 19, 1978
    Inventor: Pierre Jean Baptiste Astier