Magnetic Features Patents (Class 70/413)
  • Patent number: 6367297
    Abstract: In a cylinder lock, one or more tumblers of the rotatable cylinder are subjected to a magnetically operative biassing member.
    Type: Grant
    Filed: May 22, 2000
    Date of Patent: April 9, 2002
    Assignee: Mottura Serrature di Sicurezza S.p.A.
    Inventor: Sergio Mottura
  • Patent number: 6367299
    Abstract: A key assembly for mounting an electronic component in the head of the key. The electronic component is mounted in either an opening such as a bore or recess formed in the key head, or a carrier connected to the heel end of the key shank. In the former case, a closure member such as a plug or adhesively backed panel member is employed to close off the opening. In the latter case, the carrier is encapsulated within a plastic key head.
    Type: Grant
    Filed: December 9, 1999
    Date of Patent: April 9, 2002
    Assignee: Strattec Security Corporation
    Inventors: David C. Janssen, Brian J. Reetz
  • Patent number: 6367298
    Abstract: A key assembly for mounting an electronic component in the head of the key. The electronic component is mounted in either an opening such as a bore or recess formed in the key head, or a carrier connected to the heel end of the key shank. In the former case, a closure member such as a plug or adhesively backed panel member is employed to close off the opening. In the latter case, the carrier is encapsulated within a plastic key head.
    Type: Grant
    Filed: September 14, 1998
    Date of Patent: April 9, 2002
    Assignee: Strattec Security Corporation
    Inventors: David C. Janssen, Brian J. Reetz, Ronald J. McGuire, Glenn A. Niles
  • Patent number: 6276179
    Abstract: A key assembly for mounting an electronic component in the head of the key. The electronic component is mounted in either an opening such as a bore or recess formed in the key head, or a carrier connected to the heel end of the key shank. In the former case, a closure member such as a plug or adhesively backed panel member is employed to close off the opening. In the latter case, the carrier is encapsulated within a plastic key head.
    Type: Grant
    Filed: December 9, 1999
    Date of Patent: August 21, 2001
    Assignee: Strattec Security Corporation
    Inventors: David C. Janssen, Ronald J. McGuire
  • Patent number: 6216501
    Abstract: An electronic key for actuating a lock, in particular for use in locking systems in automobiles, is described. The housing of the electronic key has the shape of a thin wedge, the narrow end of the wedge being designed for insertion into the lock. The parts active for the actuation of the lock are also accommodated here. Moreover, the housing has a receptacle for a key bit for a mechanical lock.
    Type: Grant
    Filed: August 12, 1997
    Date of Patent: April 17, 2001
    Assignee: Marquardt GmbH
    Inventors: Jakob Marquardt, Karl Mueller, Ekkehard Sachs
  • Patent number: 6189347
    Abstract: A training handcuff key for use during training of security officers in the use of handcuffs used to restrain a subject. The training key includes a magnet washer that holds the key adjacent the surface of the handcuff keyhole, even during violent jerking and/or dropping of the handcuffs during simulated apprehension situations. The training key operates in all respects as does a standard handcuff key, but includes the feature of remaining adjacent the handcuff keyhole, while having a profile which does not interfere with the training use of the handcuffs. The training key is removable after completion of the training exercises, permitting the handcuffs to be used in a standard manner. Use of the training handcuff key dramatically reduces the time required to remove the handcuffs after they have been applied to the subject, therefore allowing the trainer and the trainees more time to develop proper and efficient methods of handcuffing and dramatically improve their skills in proper handcuffing techniques.
    Type: Grant
    Filed: September 3, 1999
    Date of Patent: February 20, 2001
    Inventor: Charles E. Thompson
  • Patent number: 6160319
    Abstract: An improved key system incorporates a number of electrical components. In one main aspect, the key is provided with electrical communication to components on the vehicle when the key is inserted into the ignition. The key connects to an antenna associated with the vehicle, such that the combined antenna size is greater than would otherwise be possible. In this application, the antenna is utilized for garage door opener purposes, and a switch is mounted on the key for actuation of the garage door opener. In another aspect, the key is recharged when inserted into the ignition. Further, the key may be provided with various other functions such as memo, vehicle deactivation, two-way communication, and other security applications. In embodiments of the key, the switches are positioned relative to a thumb area such that inadvertent actuation of the switches is made less likely.
    Type: Grant
    Filed: January 20, 1999
    Date of Patent: December 12, 2000
    Assignee: Lear Automotive Dearborn, Inc.
    Inventors: LeeAnn Marougi, Marian O. Borzea, Joseph D. King
  • Patent number: 6041631
    Abstract: The cylinder lock comprises blocking tumblers which are guided parallel to the broad sides of the key channel. On the broad sides (13, 14) of the flat key (2) guide grooves (15, 16) are disposed which cooperate with carriers on the blocking tumblers. The grooves (15, 16) on the key (2) comprise several function regions, wherein a subregion (51) of the groove comprises an expanded groove width. The tumblers whose carriers engage these expanded groove regions (51) are equipped with additional positioning elements. This configuration prevents the unauthorized opening of a lock according to the invention with a key (2) with duplicated guide grooves (15, 16).
    Type: Grant
    Filed: June 11, 1998
    Date of Patent: March 28, 2000
    Assignee: R. Berchtold AG
    Inventor: Benno Vonlanthen
  • Patent number: 6041628
    Abstract: A magnetic lock assembly includes a magnetic lock cylinder for actuating a latch assembly, wherein the magnetic lock cylinder including a lock sleeve having an axial rotor hole and a plurality of tumbler sockets radially distributed on an inner surface of the lock sleeve; a plurality of magnet tumblers, each of which has a north pole and a south at two ends respectively, being coaxially placed in the tumbler sockets respectively; a tubular lock rotor being rotatably and coaxially fitted in the axial rotor hole of the lock sleeve, the lock rotor having an axial through hole and a plurality of locking holes radially distributed through a rotor wall thereof; a locker tube being fittedly disposed inside the axial through hole of the lock rotor to define a keyway therethrough; a magnetic key including a round key body having a plurality of magnet sockets provided around the key body corresponding to the axial and radial positions of the magnet tumblers in the magnetic lock cylinder respectively, and a plurality of
    Type: Grant
    Filed: August 13, 1999
    Date of Patent: March 28, 2000
    Assignees: Hua Ye Lin, Lincoln Tsai
    Inventor: Zhong Zhe Lin
  • Patent number: 6035677
    Abstract: A key assembly for mounting an electronic component in the head of the key. The electronic component is mounted in either an opening such as a bore or recess formed in the key head, or a carrier connected to the heel end of the key shank. In the former case, a closure member such as a plug or adhesively backed panel member is employed to close off the opening. In the latter case, the carrier is encapsulated within a plastic key head.
    Type: Grant
    Filed: July 17, 1995
    Date of Patent: March 14, 2000
    Assignee: Strattec Security Corporation
    Inventors: David C. Janssen, Brian J. Reetz
  • Patent number: 5878611
    Abstract: A flat metal key has a groove-shaped recess in the narrow side of the bow for receiving a transponder as a code transmitter, a ferrite coil and a line connecting the ferrite coil with the code transmitter.
    Type: Grant
    Filed: September 30, 1997
    Date of Patent: March 9, 1999
    Assignee: Keso Salzburg-GmbH
    Inventors: Leonhard Lerchner, Hermann Hainzlmaier
  • Patent number: 5870913
    Abstract: A key device having a key coil (75a) disposed in a key (75) inserted into a key cylinder (2). Vehicle coils (5a to 5d) which are disposed on a vehicle and to be magnetically coupled with the key coil (75a) perform supply of an electric power and air-propagation communication, thereby reading code information transmitted from the key (75a) . The coils are configured in such a manner that the vehicle coils (5a to 5d) are disposed in the vicinity of a key insertion slot (2a) of the key cylinder (2) so that an induction magnetic field is generated in a substantially upper half portion of the key insertion slot or in a pair of lateral portions on both the sides of the key cylinder.
    Type: Grant
    Filed: October 9, 1996
    Date of Patent: February 16, 1999
    Assignee: Kansei Corporation
    Inventor: Tadao Kohzu
  • Patent number: 5819568
    Abstract: A signal transmitter for transmitting control signals is fitted to a key element so that signals can be transmitted to an operating device with which the key is used. Illustrative is the fitting of an automobile ignition key to a fob housing in which the signal transmitter is carried. The head part of an ignition key is subjected to a punching operation to shear off a first portion of the head part leaving a remaining head part portion with wings disposed laterally at opposite sides of the key shank part. Holes are drilled in the remaining head part portion and the remaining head part portion is received in an anchorage in the housing with the key shank extending through a notch in the housing. The remaining head part is then secured to the housing with screws passing through the lateral wing openings and into anchorage posts formed in the housing.
    Type: Grant
    Filed: November 12, 1996
    Date of Patent: October 13, 1998
    Assignee: Audiovox Corporation
    Inventors: D. Scott Christie, Thomas Wouters
  • Patent number: 5758524
    Abstract: A locking apparatus for use on a handle operable to be gripped by a user's hand. The apparatus includes a moveable actuator operable to be moved by a portion of a user's hand when gripping the handle. A first moveable blocking member is connected to the handle and is operable to be moved into an enabling position in which movement of the movable actuator is enabled and is operable to be moved into a blocking position in which movement of the actuator is blocked by the blocking member interfering with movement of the actuator. A first mounted magnet is connected to the first blocking member and is disposed in a position on the handle such that at least one of the user's fingers will be adjacent the first mounted magnet when the handle is gripped. The first mounted magnet is operable to cooperate with a first adjacent magnet placed adjacent the first mounted magnet to move the first blocking member between the blocking and enabling positions.
    Type: Grant
    Filed: March 22, 1996
    Date of Patent: June 2, 1998
    Inventor: Sandy Tai Sheung Yu
  • Patent number: 5746078
    Abstract: A new Protection Device For Key Lock Openings for preventing moisture and dirt from entering key locks. The inventive device includes a dome-shaped cap, a handle on one side of the cap, and a magnetized clip extending from the other side of the cap and sized to fit within a key lock opening.
    Type: Grant
    Filed: December 9, 1996
    Date of Patent: May 5, 1998
    Inventor: Mark Kiernan
  • Patent number: 5732579
    Abstract: A key (10) is provided that includes a key body (12) having a forked end. The forked end comprises a first tine (14) and a second tine (16). A transponder (20) is disposed between the first tine (14) and the second tine (16). The transponder (20) is operable to generate signals. An air coil antenna (18) is coupled to the key body (12) proximate the forked end and is electrically coupled to the transponder (20). The air coil antenna (18) is operable to transmit signals generated by the transponder (20).
    Type: Grant
    Filed: May 29, 1997
    Date of Patent: March 31, 1998
    Assignee: Texas Instruments Incorporated
    Inventors: Loek D'Hont, Peter Mittertrainer
  • Patent number: 5727408
    Abstract: A key device includes a signal processing device for generating a signal containing specific information, a key plate having a stem and fitting device for fitting the signal processing device and the stem, the fitting device provided with the stem and the signal processing device, the fitting device of the signal processing device being formed while preliminarily resin-molding.
    Type: Grant
    Filed: November 8, 1995
    Date of Patent: March 17, 1998
    Assignee: Kabushiki Kaisha Tokai Rika Denki Seisakusho
    Inventors: Takashi Mizuno, Sadao Kokubu, Hisashi Aoki, Shinichi Koga, Yoshiyuki Mizuno
  • Patent number: 5664449
    Abstract: A magnetic key operated lock has an anti-rap arrangement which comprises a magnet pin supported in a bar mounted in a slide member. The remote end of the pin fits into an aperture in a locking plate and is pivoted to swing downwards out of the aperture when a correctly coded key is inserted into the lock. The correctly coded key has a repelling spot to pivot the magnet as required and before the key attempts to move the slide member from its locked position. Rapping on the face of the lock cannot move the remote end of the magnet pin out of the aperture because it is restrained by its pivoting action from moving laterally out of the locking plate. Another anti-rap arrangement includes a padlock incorporating both anti-rap arrangements.
    Type: Grant
    Filed: February 16, 1995
    Date of Patent: September 9, 1997
    Inventor: Bruce Samuel Sedley
  • Patent number: 5632168
    Abstract: A key lock device for use in vehicle engine ignition comprising signal transmitting/receiving coils provided on a key and a key cylinder respectively for transmitting and receiving radiowave signals between each other upon insertion of the key into the key cylinder, to judge the authenticity of the key, wherein the coiled antenna is wound coaxially around the key cylinder, and the coils provided on the key is housed integrally in the grip portion of the key so as to situate coaxially with the coiled antenna wound around the key cylinder when a key shank is inserted into the key cylinder. A holding member is formed integrally to the inside of a grip portion of the key, and the coiled antenna provided on the key is housed in the holding member. The coiled antenna wound around the key cylinder is insert-molded in the cover member coaxially with a key-inserting axial line.
    Type: Grant
    Filed: March 31, 1995
    Date of Patent: May 27, 1997
    Assignee: Honda Lock Mfg. Co., Ltd.
    Inventor: Tsunenori Yano
  • Patent number: 5622067
    Abstract: A magnetically coded lock assembly has a lock having a housing formed with a key slot, a latch element movable in the housing between a locked and an unlocked position, and at least one magnet wheel in the housing rotatable adjacent the slot about a wheel axis. This magnet wheel is provided with a magnet, operatively engageable with the latch element, and displaceable between a blocking position preventing the latch element from moving from the locked to the unlocked position and a freeing position not blocking such movement of the latch element. A key has a body fittable in the slot and formed with at least one seat and a respective magnet-carrying disk rotatable in the seat about a disk axis through a plurality of angularly offset positions. Each disk is closely juxtaposed with a respective one of the wheels when the key body is fitted in the slot.
    Type: Grant
    Filed: January 25, 1995
    Date of Patent: April 22, 1997
    Assignee: Sudhaus Schloss-und Beschlagtechnik GmbH & Co.
    Inventor: Karl-Heinz Waitz
  • Patent number: 5611223
    Abstract: A security apparatus for attaching a portable unit to be protected to a supporting surface. The security apparatus includes a normally deactivated passive locking unit, which is activated by an electronic key unit, which is portable and moved adjacent to the passive locking unit to power it. The key unit includes a device for coupling electromagnetically the key and the locking units to transmit electrical power therebetween. A magnet is concealed within the security device to activate the electronic key, only when it is placed in the proper position relative thereto. Additionally, a mechanical arrangement for a locking pin is employed to further provide a level of sophistication before the actual unlocking of the device occurs.
    Type: Grant
    Filed: May 19, 1995
    Date of Patent: March 18, 1997
    Assignee: Mardesich Enterprises, Inc.
    Inventor: Joseph C. Spitzer
  • Patent number: 5605065
    Abstract: The apparatus is an improved magnetically operated locking device having a key and a cylinder. The cylinder has a longitudinal axis with a stator and a rotor. An interface is defined between the stator and the rotor. The rotor is rotatable by the key above the longitudinal axis of the cylinder. The improvement of the present invention includes a plurality of magnets on the key which are cooperative with a plurality of magnets mobile in the cylinder. The plurality of magnets on the key are gripped in sheaths of ferromagnetic material. The plurality of magnets on the cylinder are also gripped in sheaths of ferromagnetic material. The magnets of the cylinder are slidable in an area of the interface in holes formed within the cylinder. The plurality of magnets in the cylinder are slidable in the hole so as to lock the rotor against rotation relative to the stator. The magnets of the cylinder are magnetically identical and identically geometrically distributed as the plurality of magnets in the key.
    Type: Grant
    Filed: July 6, 1994
    Date of Patent: February 25, 1997
    Inventors: Jesus Lopez-Casals, Jacques Sarthou
  • Patent number: 5605067
    Abstract: Electronic identification device, notably a key, intended to be used with an electronic lock and comprising in a conducting body (16) two recesses (8,10) arranged facing each other and separated by an intermediate wall (14), an opening (12) being provided in the intermediate wall between the two recesses. Two conducting elements (22,28) are arranged in the two recesses and in the opening, these two elements being electrically and mechanically connected to each other with the aid of a stud (26) driven into a blind hole (34) respectively associated with the two conducting elements (22,28). The electronic unit (2) is electrically connected to the body (16) and to the two conducting elements (22,28) with the aid of conducting pads (48,50) arranged on a sheet (38) placed in one of the two recesses (8) between one plate (24) and the intermediate wall (14). The conducting elements (22,28) are electrically insulated from the conducting body (16).
    Type: Grant
    Filed: September 20, 1995
    Date of Patent: February 25, 1997
    Assignee: Em Microelectronique-Marin S.A.
    Inventor: Alain Juan
  • Patent number: 5551267
    Abstract: A lock for the ignition circuit for an automobile including a Hall effect control sensor which is activated by a control magnet on the cylinder member of the lock so that when the cylinder is rotated by the key to its start position, the control sensor is activated. The activation of the control sensor provides one of several starting criteria to an ignition for starting an automobile. An anti-tampering sensor spaced from and adjacent to the control sensor has a trip level which is lower than the trip level of the control sensor so that magnetic forces induced from the exterior of the lock cannot trip the control sensor. A blocking plate is disposed between the control sensor and the anti-tampering sensor to prevent the anti-tampering sensor from being tripped by the control magnet when the cylinder member is rotated to its start position and to enable the anti-tampering sensor to be tripped first to produce a deactivation signal in response to a magnetic force induced from the exterior of the lock.
    Type: Grant
    Filed: April 15, 1994
    Date of Patent: September 3, 1996
    Assignee: Briggs & Stratton Corporation
    Inventors: David C. Janssen, Thomas G. Osborne
  • Patent number: 5548984
    Abstract: A locking/unlocking state confirming device includes a drive magnet formed of at least a pair of permanent magnets and a key provided with a key bow. A magnet holding chamber is formed within the key bow. An indicator magnet within the chamber is magnetized in a direction at a right angle relative to a center axis thereof and has first and second outer peripheral surfaces painted different colors. A viewing window is open to the chamber at at least one side surface of the key bow. A holding plate is disposed within the key bow at a location rearwardly of the magnet holding chamber.
    Type: Grant
    Filed: August 8, 1994
    Date of Patent: August 27, 1996
    Inventor: Takayoshi Miyatsu
  • Patent number: 5526662
    Abstract: A combination key-like device and electrical receptacle for the key-like device wherein the receptacle defines electrical contact surface areas for mating with corresponding contact surface areas defined by the key-like device. At least one clip defines the electrical contact surface areas for the said receptacle and the clip is supported on the receptacle body. A keyway opening is defined by the body and the clip comprises a transverse portion and a pair of legs extending outwardly from the transverse portion with contact elements defined by each of the legs extending inwardly toward the keyway opening and with openings defined by the body communicating with said keyway opening for receiving the contact elements. A contact band is carried by the key-like device whereby insertion of the key-like device into the keyway opening brings the contact band into electrical contact with at least one of the contact elements.
    Type: Grant
    Filed: December 28, 1993
    Date of Patent: June 18, 1996
    Assignees: Duncan Industries Parking Control Systems Corp., Datakey, Inc.
    Inventors: Robert R. Diekhoff, Joseph H. Sutton, Hazem Hassan, Michael Boehner
  • Patent number: 5513507
    Abstract: The invention relates to a card for a pledge lock, more particularly of a shopping or luggage trolley, wherein the lock can be magnetically actuated by the card.
    Type: Grant
    Filed: June 6, 1994
    Date of Patent: May 7, 1996
    Assignee: Vendoret Holding S.A.
    Inventor: Horst Merchel
  • Patent number: 5485733
    Abstract: A magnetic lock has a latch magnet positioned on a pivotal latch. An axial section of the pivotal latch is attached pivotally to a latch housing at a latch axis. The latch housing is attached to an inside of a compartment closure that is closeable against a frame to which a latch plate is attached. A plate-contact end of the pivotal latch is extended outward radially from the axial section of the pivotal latch. An axial-end magnetic pole of the latch magnet is positioned proximate the axial section of the pivotal latch. An actuation-end magnetic pole of the latch magnet is positioned proximate the plate-contact end of the pivotal latch. A reset magnet is positioned on the latch housing at an opposite side of the latch axis from a latch-plate side of the pivotal latch. Magnetic poles of the reset magnet are positioned in like-pole-to-like-pole relationship to the latch magnet, such that the reset magnet repels the latch magnet to actuate the pivotal latch in a direction of engagement with the latch plate.
    Type: Grant
    Filed: May 13, 1993
    Date of Patent: January 23, 1996
    Inventor: Charles G. Hoffman
  • Patent number: 5469727
    Abstract: An electronic lock cylinder comprises a housing (1) with a cylinder core (9) disposed rotatably therein and lockable by a key (15) via mechanical tumblers (21). Electronic control circuits (45, 47) capable of being coupled inductively via coupling coils (43, 49) for the transmission of coding information, are associated with the lock cylinder and the key (15). The coupling coil (43) of the lock cylinder, and the electronic components included in the lock cylinder and a mounting (51), are combined into a structural unit which is removably attached to a front face of the lock cylinder. This permits separate assembly of the mechanical components and of the electronic components of the lock cylinder.
    Type: Grant
    Filed: March 8, 1993
    Date of Patent: November 28, 1995
    Assignee: Aug.Winkhaus GmbH & Co. KG
    Inventors: Karl-Heinz Spahn, Helmut Aswegen, Franz Schwerdt
  • Patent number: 5433096
    Abstract: A key assembly for mounting an electronic component in the head of the key. The electronic component is mounted in either an opening such as a bore or recess formed in the key head, or a carrier connected to the heel end of the key shank. In the former case, a closure member such as a plug or adhesively backed panel member is employed to close off the opening. In the latter case, the carrier is encapsulated within a plastic key head.
    Type: Grant
    Filed: August 26, 1993
    Date of Patent: July 18, 1995
    Assignee: Strattec Security Corporation
    Inventors: David C. Janssen, Brian J. Reetz
  • Patent number: 5406815
    Abstract: A magnetic key operated lock has code changing magnet pins 108a, 110a, 112a and 114 a mounted in rotatable carriers 104 and 106 in a slide member 6. Spurious rotation of the carriers is prevented by a spring biassed bar 400 which is only released by keys, coded as code changing keys, when they are fully inserted and pressed against an end 403 of the bar 400 and by carriers 104 and 106 held against rotational movement by one or more of the above pins entering blind bores; the pins also acted upon by such keys in the slide member 6 when they are fully inserted.
    Type: Grant
    Filed: June 3, 1993
    Date of Patent: April 18, 1995
    Inventor: Bruce S. Sedley
  • Patent number: 5387895
    Abstract: A control apparatus which includes apparatus for storing a first digital code, apparatus for storing a second digital code, and apparatus for comparing the first and second digital codes, the apparatus for comparing including first and second generally dish shaped members that are dimensioned and configured for nesting relationship. In some forms of the invention the dish shaped members are each rotationally symmetrical. The first and second dish shaped members may each include a plurality of steps on the face thereof. At least one of the first and second dish shaped members includes a plurality of steps on the face thereof. The other of said first and second dish shaped members may includes a plurality of steps on the face thereof. The apparatus will often include means for conducting disposed respectively in contact with the conductive generally planar members. Some of the generally planar members may have tab portions for connection thereto.
    Type: Grant
    Filed: October 21, 1993
    Date of Patent: February 7, 1995
    Assignee: MagiCorp Inc.
    Inventors: Louis A. Keppner, Ramon L. Lecours
  • Patent number: 5355701
    Abstract: Methods and apparatus for decoding pin tumbler locks, and more specifically, a mechanical key card lock. To determine the length and weight of a given pin tumbler, a probe is inserted within the lock, comprised of one or a matrix of many force sensing resistors. The probe will respond to variations in pressure and tension of each pin tumbler, and will thus provide a range of output resistances, directly related to the pressure exerted upon the sensor by a particular pin tumbler. The outputs of the sensors are then electronically sensed and recorded so that a duplicate key can be produced.
    Type: Grant
    Filed: March 1, 1993
    Date of Patent: October 18, 1994
    Inventor: Marc W. Tobias
  • Patent number: 5339661
    Abstract: The present invention relates to a magnetic card lock with key card which can be inserted into an insertion shaft with gripping opening, the key card being first insertable up to a first stop position, and in which position the key code is requested, and thereupon displaceable by an actuation distance up into the second stop position; in order to obtain a solution which is particularly easily manipulated, it proposes that the broad surface of the key card on its end facing away from the direction of insertion have a visibly differentiated first partial surface (100) which fills up the surface of the gripping opening (107) and is visible in the second stop position.
    Type: Grant
    Filed: July 16, 1992
    Date of Patent: August 23, 1994
    Assignee: Schulte-Schlagbaum Aktiengesellschaft
    Inventor: Armin Eisermann
  • Patent number: 5299436
    Abstract: A security apparatus for attaching a portable unit to be protected to a supporting surface. The security apparatus includes a normally deactivated passive locking unit, which is activated by an electronic key unit, which is portable and moved adjacent to the passive locking unit to power it. The key unit includes a device for coupling electromagnetically the key and the locking units to transmit electrical power therebetween. A magnet is concealed within the security device to activate the electronic key, only when it is placed in the proper position relative thereto. Additionally, a mechanical arrangement for a locking pin is employed to further provide a level of sophistication before the actual unlocking of the device occurs.
    Type: Grant
    Filed: October 18, 1991
    Date of Patent: April 5, 1994
    Assignee: Mardesich Enterprises, Inc.
    Inventor: Joseph C. Spitzer
  • Patent number: 5281945
    Abstract: A control apparatus which includes apparatus for storing a first digital code, apparatus for storing a second digital code, and apparatus for comparing the first and second digital codes, the apparatus for comparing including first and second generally dish shaped members that are dimensioned and configured for nesting relationship. In some forms of the invention the dish shaped members are each rotationally symmetrical. The first and second dish shaped members may each include a plurality of steps on the face thereof. At least one of the first and second dish shaped members includes a plurality of steps on the face thereof. The other of said first and second dish shaped members may includes a plurality of steps on the face thereof.
    Type: Grant
    Filed: February 21, 1992
    Date of Patent: January 25, 1994
    Assignee: Magicorp, Inc.
    Inventors: Louis A. Keppner, Ramon L. Lecours
  • Patent number: 5195341
    Abstract: An electronic lock is constructed to resemble the appearance and functionality of a conventional cylinder lock. Its key has a bit in which is mounted an integrated circuit chip storing the key code and including a transmission coil for inductive coupling with a reading head in the lock. The latter includes a coil for generating a high frequency alternating magnetic field across a localized region of the keyway concentrated via a toroidal ferrite core structure which defines a gap spanning the keyway through which the chip passes when the key bit is inserted. This core structure includes a U-shaped part in the stationary lock housing around which the coil is wound, and two parts mounted in the barrel, one to either side of the keyway, which register with the part in the housing when the barrel is in the key-reading position. Further ferrite pads may be mounted to either side of the coil in the key itself, to register with the ferrite parts in the barrel.
    Type: Grant
    Filed: December 20, 1991
    Date of Patent: March 23, 1993
    Assignee: Chubb Lips Nederland bv
    Inventor: Evert Nieuwkoop
  • Patent number: 5193371
    Abstract: A magnet card type lock includes an outer case, a slider having a key hole slit formed therein, an engagement member firmly secured to the outer case, a plurality of tumbler holes formed in conformity with a predetermined pattern of arrangement, a plurality of magnet tumblers bridged between the case and the slider, a projection integrated with the slider to be engaged with a locking mechanism and a magnet card adapted to be inserted into the key hole slit of the slider to serve as a fellow key. To prepare a specific key difference among a number of magnet card type locks, a predetermined number of tumbler holes are selected from the tumbler holes which extend at a substantially right angle relative to the slider and the outer case. The magnet card is formed with a pluraltiy of apertures some of which are immovably filled with permanent magnets corresponding to the selected number of tumbler holes.
    Type: Grant
    Filed: December 24, 1991
    Date of Patent: March 16, 1993
    Assignee: Kabushiki-Kaisha
    Inventor: Shinjiroh Yamane
  • Patent number: 5188405
    Abstract: A magnetically operated latch including a pivotally attached magnetic latching means engageable with an aubtment, but disengageable when brought into magnetic contact with a key magnet. A pivotably movable lock is provided to prevent reengagement with the abutment when the key magnet is disengaged from magnetic contact with the magnetic latching means.
    Type: Grant
    Filed: March 6, 1991
    Date of Patent: February 23, 1993
    Assignee: Rev-A-Shelf, Inc.
    Inventor: Marco Maccaferri
  • Patent number: 5179850
    Abstract: A magnetic latchkey for an access-control lock with a series of magnets fastened to sliding pieces capable of being displaced by means of levers or extensions so that each magnet has three possible positions: north pole, south pole, or a point intermediate to both. This allows the magnet to be moved in front of the appropriate sensor of the lock, in such a way that when there is a particular combination of poles in the latchkey and the same combination of switches on the control panel, in touch with the position of the switches at the control panel will be identical to the positions of the levers of the latchkey. An alternative is for each magnet of the latchkey to have two sensors inside the lock.
    Type: Grant
    Filed: October 29, 1990
    Date of Patent: January 19, 1993
    Inventor: Juan Capdevila Mas
  • Patent number: 5156032
    Abstract: A key assembly for vehicle anti-theft security system includes a mechanical key having a through aperture for receiving a resistor pellet which is inserted in the aperture and mechanically secured by swaging or staking the key material adjacent the aperture to force key material into engagement with the outer perimeter of the resistor pellet.
    Type: Grant
    Filed: July 10, 1990
    Date of Patent: October 20, 1992
    Assignee: Briggs & Stratton Corporation
    Inventor: James R. Edgar
  • Patent number: 5140836
    Abstract: A clamp for use as a theft deterrent device includes a U-shaped member having first and second legs, with each leg including a shelf disposed on the inside edge of the member and extending laterally toward the opposite leg; a housing defining a pair of longitudinal channels for receiving the legs of the U-shaped member and a slot extending between the longitudinal channels; a pair of overlapping plates disposed for separate movement within the slot into and away from different ones of the longitudinal channels, with each plate including a row of teeth disposed on a longitudinal edge of the one plate that moves into one channel for engaging the shelf on one leg of the U-shaped member received by said one channel to prevent removal of the one leg from the channel.
    Type: Grant
    Filed: September 19, 1991
    Date of Patent: August 25, 1992
    Assignee: Security Tag Systems, Inc.
    Inventors: Dennis L. Hogan, Donald J. Beach
  • Patent number: 5133202
    Abstract: A decoder is provided for disk tumble locks which is electrically rather than mechanically operated. A plurality of separate keys each has a blade sufficiently long to extend through all of the disks in the lock. At least one cut is provided in the blade of each key. The depth of the cut in each key is different, the cut of each key being coordinated to a different depth of disk from among the known alternative disk depths for the given tuumbler lock to be decoded. The base surface of each cut contains discrete electrical contact connected by a discrete conductor to a point on the key which is externally accessible when the key is fully inserted into the lock. Each contact is positioned on its key so that, when the key is inserted into the lock keyway, an electrically conductive circuit is completed by the disk if the depth of the disk corresponds to or exceeds the depth of the cut.
    Type: Grant
    Filed: May 20, 1991
    Date of Patent: July 28, 1992
    Inventor: Maurice Grant
  • Patent number: 5085062
    Abstract: A key composed of a body with recesses which can be filled with magnetized disks, arranged in a combination of norths and/or souths and/or lack thereof, and with a sliding lid holding the magnetic disks in the recesses. The lock has one or two sets of magnetic sensors geometrically ordered according to the refillable recesses. When the key is placed adjacent to the series of magnetic lock sensors, the sensors detect the magnetized disks, pass the detected signal to a conventional converter-codifier circuit that generates a code that is sent, by cable or radio, to a station which interprets the code and, if correct, allows access.
    Type: Grant
    Filed: September 27, 1989
    Date of Patent: February 4, 1992
    Assignee: Juan Capdevila
    Inventor: Juan Capdevila
  • Patent number: 5074136
    Abstract: A lock device which includes a permanent magnetic key, a rotary circular cylinder having a key aperture, a plurality of main apertures which each contain a main locking pin with a main coil spring and permanent magnet, respectively, and a tubular cylinder having a plurality of auxiliary apertures for mating with the main apertures which contain an auxiliary locking pin with an auxiliary spring, respectively, whereby in a locked position, the auxiliary locking pins are located between the rotary circular and tubular cylinders, and in an unlocked position, when the permanent magnetic key is inserted into the key aperture, the auxiliary locking pins and the permanent magnets are moved to the tubular and rotary circular cylinders, respectively, so that the lock device is unlocked.
    Type: Grant
    Filed: October 22, 1990
    Date of Patent: December 24, 1991
    Inventors: Young C. Kim, Young K. Kwak
  • Patent number: 4956984
    Abstract: A dual locking latches locking device uses an electronic system or mechanical transmission system to respectively control its own open and close motions. Its dual latches are controlled respectively by two clutch transmission mechanisms. When a user inserts a correct magnetic card in the card reader, its first clutch transmission mechanism is in engagement. When a user inputs a correct code via the keyboard or uses a correct key to unlock it, the second clutch transmission mechanism is all in engagement. At this moment, the user turns the external or internal button and handle at the same time, the lock can be unlocked right away.
    Type: Grant
    Filed: December 6, 1988
    Date of Patent: September 18, 1990
    Inventor: Lo Chi-Cheng
  • Patent number: 4936896
    Abstract: A device for confirming whether a lock is locked or unlocked in which a display magnet consisting of a sheet- or plate-like permanent magnet is rotatably disposed within a key head. Two magnet pairs, each consisting of a first drive magnet, and a second drive magnet are located at angular positions, respectively, on the front end face of a cylinder lock at opposite sides, respectively, of an intermediate angular position within a range of rotation of a key for locking and unlocking the cylinder lock. The direction of magnetization of one magnet pair is opposite to that of the other magnet pair.
    Type: Grant
    Filed: December 19, 1988
    Date of Patent: June 26, 1990
    Assignee: Hiroshi Hasegawa
    Inventor: Jitsuho Takatsuka
  • Patent number: 4932228
    Abstract: A locking device includes a lock and key and has tumblers which can be brought by a key into a release position, and provides, in particular, for a large number of closing combinations, that at least one of the tumblers can be brought, in addition or alternatively to its direct control by the base code of the corresponding key, by means of a magnet coil into a release position. The coil is energizable by a reading device which detects at least one supplementary code of the key.
    Type: Grant
    Filed: January 26, 1988
    Date of Patent: June 12, 1990
    Assignee: Schulte-Schlagbaum Aktiengesellschaft
    Inventor: Armin Eisermann
  • Patent number: 4924686
    Abstract: A flat turning key (2) has a mechanically coded key bit (7) and an additional electronic information carrier (9), as well as a contact part (12) with contact points (8) located at the rear part of the key bit (7). In the cylinder lock (1) are arranged further electronic components (41) connected with a current source that cooperate with the information carrier (9) via the contact points (8) on the key (2). In the region of the contact part (12) of the cylinder lock (1) contact elements (55) arranged in a guiding element (50) establish an electric contact between the key (2) and the lock (1) when the key (2) is turned in the lock (1). The contact elements (55), the electronic components (41) and a microswitch (42) are connected with a common support or printed circuitboard (14) and detachably secured together with the guiding element (50) in the stator housing (3).
    Type: Grant
    Filed: October 4, 1988
    Date of Patent: May 15, 1990
    Assignee: R. Berchtold AG
    Inventor: Benno Vonlanthen
  • Patent number: 4918955
    Abstract: In a vehicle key device, when a key is inserted into a lock, the former is magnetically coupled to the latter so that data are transmitted therebetween, and only when the data provided by the lock and key correspond with each other is the driving of the engine permitted. This device positively prevents the driving of a vehicle by an unauthorized person.
    Type: Grant
    Filed: October 6, 1987
    Date of Patent: April 24, 1990
    Assignee: Kabushiki Kaisha Tokai Rika Denki Seisakusho
    Inventors: Takashi Kimura, Mitsuo Mori