US3334936A - Magnetic door latch - Google Patents

Magnetic door latch Download PDF

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Publication number
US3334936A
US3334936A US437782A US43778265A US3334936A US 3334936 A US3334936 A US 3334936A US 437782 A US437782 A US 437782A US 43778265 A US43778265 A US 43778265A US 3334936 A US3334936 A US 3334936A
Authority
US
United States
Prior art keywords
bolt
door
magnetic
tumbler
armature
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US437782A
Other languages
English (en)
Inventor
Hekelaar Maarten
Wilhelmus Hendrikus Donselaar
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
US Philips Corp
North American Philips Co Inc
Original Assignee
US Philips Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by US Philips Corp filed Critical US Philips Corp
Application granted granted Critical
Publication of US3334936A publication Critical patent/US3334936A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05C—BOLTS OR FASTENING DEVICES FOR WINGS, SPECIALLY FOR DOORS OR WINDOWS
    • E05C19/00—Other devices specially designed for securing wings, e.g. with suction cups
    • E05C19/16—Devices holding the wing by magnetic or electromagnetic attraction
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05C—BOLTS OR FASTENING DEVICES FOR WINGS, SPECIALLY FOR DOORS OR WINDOWS
    • E05C19/00—Other devices specially designed for securing wings, e.g. with suction cups
    • E05C19/16—Devices holding the wing by magnetic or electromagnetic attraction
    • E05C19/163—Devices holding the wing by magnetic or electromagnetic attraction a movable bolt being held in the striker by a permanent magnet
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T292/00—Closure fasteners
    • Y10T292/11—Magnetic

Definitions

  • the invention relates to a door latch comprising a locking bolt co-operating with a soft-iron jamb plate and a handle secured to a tumbler which operates to tilt the bolt before separating the bolt and locking plate or vice versa.
  • the invention has for one object to provide a door latch, the size of which is such that thickness of the doors in which such locks are mounted may be much smaller than in the case of mechanical locks, while effective latching of the door is not adversely affected.
  • the invention is characterized in that in the closed state of the latch the bolt and the jamb plate are held together by magnetic force of attraction.
  • the invention has the following additional objects:
  • the door locks are small and hence inexpensive.
  • magnetic locks can be actuated so that wear is at a minimum.
  • the bolt consists of a permanent magnet the advantage is obtained that no recess is required in the door post or jamb.
  • the associated door post is practically always provided with a recess for accommodating the lock bolt, when the door is closed. Providing such a recess takes time and may, under certain conditions, bring about weakening of the door post.
  • the bolt may be held fully withdrawn When the door is opened. With mechanical locks the lock bolt practically always projects, so that clothing may readily hook on it.
  • FIG. 1 is a longitudinal sectional view of a latch according to this invention.
  • FIG. 2 is a cross sectional view of the latch taken on the line IIII in FIG. 1.
  • FIG. 3 shows the tumbler of said latch on an enlarged scale.
  • FIG. 4 is a plan view of said tumbler and FIG. 5 shows another embodiment of the magnetic latch according to the invention.
  • the magnetic latch comprises a brass housing I having a recess 2 for accommodating a bolt generally designated 3. Said bolt is to some extent freely movable in the recess and may project slightly from the housing 1 on the front side beyond the sheathing 4.
  • the bolt 3 consists of a fiat magnet 5 of Magnadur, which is magnetised in the direction of thickness, and which is provided on two opposite sides with pole pieces 6 and 7.
  • the housing 1 is fastened to a door 8 in a conventional manner,
  • the shaft projects from the door 8 on either side and may beprovided with a known knob or handle conventionally used with mechanical latch assemblies.
  • the tumbler 10 co-operates with the magnetic bolt 3 by virtue of the pole pieces 6 and 7 of the bolt which are prolonged to the rear and are connected by a pin 12. Said pin is coupled with a lug 13 of the tumbler 10 in a conventional manner, and acts as a cam follower when the tumbler is rotated, along a camming or profiled surface of recess 14 which has an ascending portion 15.
  • the free end of bolt 3 co-operates with a ferro-magnetic jamb plate 16, also termed an armature, which is provided with a shallow cavity 17 and which is secured to the door post 18 in a conventional manner by wood screws. When the door is closed the front side of the bolt 3 is located in the cavity 17 of the armature 16.
  • the door knob or handle (not shown) is turnedso that the tumbler 10 also turns and the lug 13 moves to the left.
  • the profiled surfaces of recess 14 come into contact with the pin 12; which first slides along the ascending portion 15.
  • the pin 12 moves upwardly and as a result the bolt 3 tilts relative to armature 16 around the edge 19 of the bolt.
  • the pin 12 slides further on the surface 14 and abuts against the bottom wall of the recess in the lug 13 which'provides the force required to separate the bolt 3 from the armature 16.
  • the door knob, and consequently the shaft 11, is returned to its initial position when the door is open and the knob released by means of a tensile spring 20 connected at one end with lug 13 and at its other end with the rear side of the sheathing 4.
  • the bolt is furthermore provided with a stop 21 which co-operates with the set screw 22, provided in the sheathing, and adjusted from the outside in a simple manner.
  • the tumbler 10 is provided with a stop 23 for preventing the handle from being turned further than necessary to withdraw the bolt. Tumbler stop 23 co-operates with the lower side 24 of the housing.
  • the armature 16 is provided with a wedgeshaped face 25, along which the pole piece 7 having a round edge 26 glides.
  • FIG. 5 shows another embodiment of a magnetic latch according to the invention, in which a recess 31 is pro- .vided in a door 30; there is shown diagrammatically a structure which comprises a ferromagnetic, lever-like locking plate 32 of soft-iron material.
  • a shaft 33 is provided in said door and may be provided on either side, in a conventional manner, with a handle (not shown).
  • the shaft 33 is furthermore provided with a tumbler 34 which co-operates with the lever 32.
  • the figure shows furthermore a door post 35 in which a brass housing 36 is provided which has a recess 37 for accommodating a magnetic bolt 38 with a certain amount of clearance.
  • This bolt consists of a flat Magnadur magnet having pole pieces, said magnet co-operating at the front end with the lever 32.
  • the shaft 23 When the latch is opened, the shaft 23 is turned in the direction of the arrow. The tumbler 34 then pushes the lever 32 in downward direction. The bolt 38 is urged into the door post, while at the same time the armature 32 tilts about the fulcrum 39.
  • the fulcrum also has a second lever 40, which bears on fiat part 41 of the tumbler 34 in the closed state of the latch, and lever 40 is furthermore connected by a tensile spring 42 with the armature or lever 32. In the opened state of the latch the leverlike armature 32 as well as the door knob, are returned to their initial position by the spring 42.
  • the housing 36 is provided on the rear side with a soft-iron strip 43, which extends across the top side and the lateral sides of the recess 37 in the housing 36. Said strip 43 exerts a small force on the magnetic bolt 38, which is thus drawn to the left in the figure.
  • the magnetic latch of this structure is particularly suitable for use in very thin doors and, moreover, in those cases, where between the door and the door post little clearance is available.
  • a magnetic door latch assembly comprising a magnetic bolt, housing means supporting said bolt, armature means for attracting said bolt for latching said door, and tumbler means coupled with a rotatable door shaft for releasing said bolt and interconnecting said magnetic bolt and said armature, the connection between the tumbler means and the magnetic bolt comprising cam means integral with said tumbler, and cam follower means integral with said magnetic bolt and in cooperative relation with said cam means whereby rotation of said door shaft will cause said cam follower to move relative to said cam thereby first tilting said bolt and then retracting said bolt from engagement with said follower.
  • said tumbler means further comprises a tumbler having a lug portion on one end of said tumbler, said lug portion having a profiled camming recess; said bolt having a cam following yoke coupled with said lug portion, said yoke having a pin operatively receivable in said profiled recess, said profiled recess being configured to tilt said bolt upon the initial movement of said door knob shaft and upon continued movement of said door knob shaft retracting said bolt for separating said bolt from said armature.
  • a magnetic door latch according to claim 2 wherein said armature comprises a jamb plate having a ramp portion and a recess for receiving said bolt.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lock And Its Accessories (AREA)
  • Wing Frames And Configurations (AREA)
  • Closing And Opening Devices For Wings, And Checks For Wings (AREA)
US437782A 1964-04-08 1965-03-08 Magnetic door latch Expired - Lifetime US3334936A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6403700A NL6403700A (fr) 1964-04-08 1964-04-08

Publications (1)

Publication Number Publication Date
US3334936A true US3334936A (en) 1967-08-08

Family

ID=19789744

Family Applications (1)

Application Number Title Priority Date Filing Date
US437782A Expired - Lifetime US3334936A (en) 1964-04-08 1965-03-08 Magnetic door latch

Country Status (6)

Country Link
US (1) US3334936A (fr)
BE (1) BE662138A (fr)
DE (1) DE1983432U (fr)
ES (1) ES311468A1 (fr)
GB (1) GB1097964A (fr)
NL (1) NL6403700A (fr)

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5362116A (en) * 1990-08-13 1994-11-08 David Doyle Self latching magnetic latching device
US20030164615A1 (en) * 2002-02-13 2003-09-04 William Ng Door latch for alarm system
WO2004083578A1 (fr) * 2003-03-19 2004-09-30 Drumm Gmbh Dispositif de fermeture magneto-mecanique
US20050184532A1 (en) * 2004-02-24 2005-08-25 D & D Technologies Self-latching magnetic latching device
US20050201045A1 (en) * 2004-03-15 2005-09-15 Asustek Computer Inc. Electronic apparatus and magnetic lock device thereof
US20050210938A1 (en) * 2004-03-24 2005-09-29 David Doyle Developments for magnetic latches
US20080012359A1 (en) * 2006-07-12 2008-01-17 Bonaiti Serrature S.P.A. Magnetic action lock
US20080024964A1 (en) * 2006-07-25 2008-01-31 Lev Jeffrey A Anti-rotation mechanism for an electronic device
US20080296915A1 (en) * 2004-02-24 2008-12-04 D & D Group Pty Limited Magnetic latch
US20090195000A1 (en) * 2008-02-05 2009-08-06 Howey Kevin Door set with magnetic actuator
US20100033279A1 (en) * 2008-08-11 2010-02-11 D & D Group Pty Ltd. Magnetic safety latch
USD647781S1 (en) 2011-02-04 2011-11-01 D&D Group Pty Ltd Handle
USD647779S1 (en) 2011-02-04 2011-11-01 D & D Group Pty Ltd Hinge
USD647782S1 (en) 2011-02-04 2011-11-01 D&D Group Pty Ltd Latch
USD649009S1 (en) 2011-02-07 2011-11-22 D & D Group Pty Ltd Hinge
USD649008S1 (en) 2011-02-04 2011-11-22 D & D Group Pty Ltd. Hinge
USD649007S1 (en) 2011-02-04 2011-11-22 D & D Group Pty Ltd Hinge
USD661173S1 (en) 2011-02-04 2012-06-05 D&D Group Pty Ltd. Hinge
USD672631S1 (en) 2011-02-04 2012-12-18 D & D Group Pty Ltd. Striker for latch
USD673024S1 (en) 2011-02-04 2012-12-25 D & D Group Pty Ltd. Hinge
USD675080S1 (en) 2011-02-04 2013-01-29 D & D Group Pty Ltd Handle
CN104669992A (zh) * 2013-12-02 2015-06-03 北汽福田汽车股份有限公司 车门紧固装置及车辆
EP2930110A1 (fr) * 2014-04-07 2015-10-14 Zodiac Seats UK Limited Agencement de mobilier pouvant être fixé
US20180162282A1 (en) * 2016-05-18 2018-06-14 Shanghai Yanfeng Jinqiao Automotive Trim Systems Co. Ltd. Console assembly for vehicle interior
US11572723B2 (en) 2019-02-27 2023-02-07 Shanghai Yanfeng Jinqiao Automotive Triim Systems Co. Ltd. Vehicle interior component
US11585132B2 (en) 2016-09-30 2023-02-21 Barrette Outdoor Living, Inc. Magnetic safety gate latch

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE145325C (fr) * 1902-12-30 1905-11-25
US2194601A (en) * 1939-03-23 1940-03-26 Edward E Kuethe Vehicle door lock
US2786702A (en) * 1954-02-23 1957-03-26 Macy O Teetor Magnetic catch
US2808281A (en) * 1956-01-04 1957-10-01 Clark Hartwell Magnetic latch
US2970857A (en) * 1957-07-24 1961-02-07 Midwest Mfg Company Magnetic door latch
FR1341221A (fr) * 1962-12-13 1963-10-25 Philips Nv Serrure à pêne magnétique

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE145325C (fr) * 1902-12-30 1905-11-25
US2194601A (en) * 1939-03-23 1940-03-26 Edward E Kuethe Vehicle door lock
US2786702A (en) * 1954-02-23 1957-03-26 Macy O Teetor Magnetic catch
US2808281A (en) * 1956-01-04 1957-10-01 Clark Hartwell Magnetic latch
US2970857A (en) * 1957-07-24 1961-02-07 Midwest Mfg Company Magnetic door latch
FR1341221A (fr) * 1962-12-13 1963-10-25 Philips Nv Serrure à pêne magnétique

Cited By (38)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5362116A (en) * 1990-08-13 1994-11-08 David Doyle Self latching magnetic latching device
US6893060B2 (en) * 2002-02-13 2005-05-17 William Ng Door latch for alarm system
US20030164615A1 (en) * 2002-02-13 2003-09-04 William Ng Door latch for alarm system
US7267378B2 (en) 2003-03-19 2007-09-11 Drumm Gmbh Magneto-mechanical locking device
DE10312269A1 (de) * 2003-03-19 2004-09-30 Drumm Gmbh Magneto-mechanische Schließeinrichtung
US20060049645A1 (en) * 2003-03-19 2006-03-09 Drumm Gmbh Magneto-mechanical locking device
WO2004083578A1 (fr) * 2003-03-19 2004-09-30 Drumm Gmbh Dispositif de fermeture magneto-mecanique
US20050184532A1 (en) * 2004-02-24 2005-08-25 D & D Technologies Self-latching magnetic latching device
US20080296915A1 (en) * 2004-02-24 2008-12-04 D & D Group Pty Limited Magnetic latch
US9790708B2 (en) 2004-02-24 2017-10-17 D & D Group Pty. Ltd. Magnetic latch
US7390035B2 (en) * 2004-02-24 2008-06-24 D&D Group Pty Limited Self-latching magnetic latching device
US20050201045A1 (en) * 2004-03-15 2005-09-15 Asustek Computer Inc. Electronic apparatus and magnetic lock device thereof
US20050210938A1 (en) * 2004-03-24 2005-09-29 David Doyle Developments for magnetic latches
US20080012359A1 (en) * 2006-07-12 2008-01-17 Bonaiti Serrature S.P.A. Magnetic action lock
US7515405B2 (en) * 2006-07-25 2009-04-07 Hewlett-Packard Development Company, L.P. Anti-rotation mechanism for an electronic device
US20080024964A1 (en) * 2006-07-25 2008-01-31 Lev Jeffrey A Anti-rotation mechanism for an electronic device
US20090195000A1 (en) * 2008-02-05 2009-08-06 Howey Kevin Door set with magnetic actuator
US7766399B2 (en) * 2008-02-05 2010-08-03 Howey Kevin Door set with magnetic actuator
US20100033279A1 (en) * 2008-08-11 2010-02-11 D & D Group Pty Ltd. Magnetic safety latch
US8393653B2 (en) * 2008-08-11 2013-03-12 D & D Group Pty Ltd. Magnetic safety latch
USD647781S1 (en) 2011-02-04 2011-11-01 D&D Group Pty Ltd Handle
USD647779S1 (en) 2011-02-04 2011-11-01 D & D Group Pty Ltd Hinge
USD649008S1 (en) 2011-02-04 2011-11-22 D & D Group Pty Ltd. Hinge
USD649007S1 (en) 2011-02-04 2011-11-22 D & D Group Pty Ltd Hinge
USD661173S1 (en) 2011-02-04 2012-06-05 D&D Group Pty Ltd. Hinge
USD672631S1 (en) 2011-02-04 2012-12-18 D & D Group Pty Ltd. Striker for latch
USD673024S1 (en) 2011-02-04 2012-12-25 D & D Group Pty Ltd. Hinge
USD675080S1 (en) 2011-02-04 2013-01-29 D & D Group Pty Ltd Handle
USD647782S1 (en) 2011-02-04 2011-11-01 D&D Group Pty Ltd Latch
USD649009S1 (en) 2011-02-07 2011-11-22 D & D Group Pty Ltd Hinge
CN104669992A (zh) * 2013-12-02 2015-06-03 北汽福田汽车股份有限公司 车门紧固装置及车辆
CN104669992B (zh) * 2013-12-02 2017-01-04 北汽福田汽车股份有限公司 车门紧固装置及车辆
EP2930110A1 (fr) * 2014-04-07 2015-10-14 Zodiac Seats UK Limited Agencement de mobilier pouvant être fixé
US20180162282A1 (en) * 2016-05-18 2018-06-14 Shanghai Yanfeng Jinqiao Automotive Trim Systems Co. Ltd. Console assembly for vehicle interior
US10717390B2 (en) 2016-05-18 2020-07-21 Shanghai Yanfeng Jinqiao Automotive Trim Systems Co. Ltd. Console assembly for vehicle interior
US10737628B2 (en) * 2016-05-18 2020-08-11 Shanghai Yanfeng Jinqiao Automotive Trim Systems Co. Ltd. Console assembly for vehicle interior
US11585132B2 (en) 2016-09-30 2023-02-21 Barrette Outdoor Living, Inc. Magnetic safety gate latch
US11572723B2 (en) 2019-02-27 2023-02-07 Shanghai Yanfeng Jinqiao Automotive Triim Systems Co. Ltd. Vehicle interior component

Also Published As

Publication number Publication date
ES311468A1 (es) 1966-02-01
NL6403700A (fr) 1965-10-11
BE662138A (fr) 1900-01-01
GB1097964A (en) 1968-01-03
DE1983432U (de) 1968-04-11

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