US3350127A - Magnetic latch for a door - Google Patents

Magnetic latch for a door Download PDF

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Publication number
US3350127A
US3350127A US441456A US44145665A US3350127A US 3350127 A US3350127 A US 3350127A US 441456 A US441456 A US 441456A US 44145665 A US44145665 A US 44145665A US 3350127 A US3350127 A US 3350127A
Authority
US
United States
Prior art keywords
bolt
door
guide
shaft
latch
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
US441456A
Other languages
English (en)
Inventor
Hekelaar Maarten
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 US3350127A publication Critical patent/US3350127A/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
    • E05C19/163—Devices holding the wing by magnetic or electromagnetic attraction a movable bolt being held in the striker by a permanent magnet
    • 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
    • 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
    • Y10T292/08—Bolts
    • Y10T292/0886—Sliding and swinging
    • Y10T292/0887—Operating means
    • 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 magnetic latch for a door and the like, comprising a lock bolt adapted to co-operate magnetically with a locking plate and being slidable and tiltable in a guide, the lock bolt and the locking plate being separated by tilting movement.
  • the invention is characterized in that the bolt is adapted to tilt to a restricted extent in the direction of movement of the door as it is opened.
  • the locking plate is provided with a wedge-shaped ramp, so that when the door is pushed for opening the lock bolt is tilted by the ramp and, after the bolt has reached a given slanting position, it slides along said ramp upon further movement of the door, so that it is pushed back into the bolt guide.
  • the invention provides a possibility of opening the door by exerting a slight force in the direction of movement for opening by pushing or pulling a handle in the direction of opening.
  • the bolt is provided laterally with a lug, in the direction of movement, said lug co-operating with a stationary portion of the guide.
  • the lug is formed by an arm with an adjustable screw, the head of which is spherical, said head being located in a hole passing through the sheating of the housing.
  • the screw can be readily screwed out of the sheating, i.e. the front side of a door lock, by means of a screw driver, the outward movement of the lock bolt being thus adjusted and the manner of tilting being determined by the pivot.
  • An advantageous embodiment comprises a lock bolt provided with an arrester for the tilting movement, which arrester is coupled with a shaft extending in the direction of movement and provided with at least one door knob, whilst by pulling or pushing the door knob the arrester is first put out of operation and then the lock is opened.
  • FIG. 1 is a longitudinal sectional view of a magnetic latch according to the invention.
  • FIG. 2 shows a variation thereof of a to the invention and FIG. 3 shows a detail along the line III-I'II FIG. 2.
  • FIG. 1 shows a magnetic, so-called push-pull latch comprising a magnetic bolt 1, which co-operates with a locking plate 2.
  • the bolt 1 is slidable and tiltable in the guide 6 of a latch according door 40 and the locking plate 2 is mounted in a conventional manner, for example with the aid of screws (not shown) in the door jamb '3.
  • the bolt 1 consists of a magnet 4 of MAGNADUR, which is provided on two opposite sides with pole pieces 5 and 7.
  • the pole piece 7 is provided with an arm or lug 8, in which :a screw 9 is threaded.
  • the screw head 10 is accessible through a hole 11 in the sheating so that the bolt can be adjusted.
  • the latch is provided with an arrester comprising a pawl 12. In the closed position the lug 13 bears on the side of the bolt 1 to prevent it from tilting.
  • a shaft 14, is provided with door knobs 15 and 16. The shaft 14 is adapted to move axially through brackets 17 and 18. The shaft 14 is surrounded by a helical spring 19, which is enclosed between the collar 20 and the tag 22, which also forms a collar. One end of the helical spring 19 cooperates through the tag 22 with the rotatable pawl 12.
  • the shaft 14 is furthermore provided with a bevelled arrester lug 23.
  • the locking plate 2 is provided with a wedge-shaped ramp 24 and recess 25. In the closed state of the lock the front side of the lock bolt is located in said recess 25.
  • the lock operates as follows. By pulling the door knob 16, or by pushing the door knob 15, the shaft 14 moves in an axial direction so that the pawl 12 is free to pivot about .pin 12a in a counterclockwise direction, since the arrester lug 23 is moved out of the path of the pawl 12.
  • the door (as it is pulled or pushed via a door handle) exerts on the bolt 1 a lateral force so that the bolt tilts about the edge forced against the wedge-shaped ramp 24.
  • the head of screw 10 serves as a fulcrum, whereby, as the door is pushed further the bolt slides into the guide 6.
  • the spring 19 returns the shaft to its initial position as shown in FIG. 1.
  • the force of the spring 19 which causes the shaft 14 to return to its initial position also acts on the tag 22 which engages the pawl 12 thereby causing the pawl 12 to rotate the bolt 1 into its initial position.
  • the arrester lug 23 also returns to its original position and will thereby block further rotation of the pawl 12.
  • FIGS. 2 and 3 show a similar magnetic lock with a different arrester.
  • the arrester comprises in this case a shaft 14 and a helical spring 19.
  • the shaft 14 is provided with a toothed rack 30, which co-operates with a pinion 31, which is coupled with a cut or semi-circular wheel 32, fulfilling the function of the pawl 12 of the magnetic lock of FIG. 1.
  • the shaft 14 moves in an axial direction as before, so that through the pinion 31 the wheel 32 turns to the right, leaving the bolt free to tilt.
  • the knob is' released, the wehel 32 returns the bolt to its non-tilted position.
  • a magnetic latch for a door comprising the combination of a locking plate of ferromagnetic material having a ramp portion and a recess for receiving a bolt, and a latch means; said latch means including a permanent magnet bolt, a bolt guide, said bolt being tiltable in the direction of opening movement of said door and slideable within saidguide, means operatively associated with said bolt for preventing tilting of said bolt and inadvertent opening of said door, knob means for moving said tilting prevention means to an inoperative position, and means for slidably positioning said bolt within said guide.
  • a magnetic latch according to claim 1 wherein said last-named means comprises an adjustable member attached to said bolt forming a fulcrum for tilting movement thereof and slidably positioning said bolt in said guide upon opening movement of said door when said bolt resides in said recess of said locking plate.
  • a magnetic latch according to claim 2 wherein said adjustable member comprises an arm extending outwardly from said bolt in said direction of tilting, a threaded bore in said arm and a screw member in said bore, an opening in said latch means for access to said screw for adjustment thereof and a head on said screw member in pivotal engagement with the edge defining said opening.
  • said tilting prevention means comprises a pivotal pawl member operatively coupled with said bolt, and a lug attached to an axially moving door knob shaft of said door knob means for positioning said lug for blocking movement of said pawl when said shaft is in its normal inactive position; the door opening force applied to said shaft moving said lug from said blocking position.
  • said tilting prevention means comprises a semi-circular member operatively coupled with said bolt, a pinion connected with said semi-circular member, said door knob means including an axially movable door knob shaft, said shaft having a rack member coupled with said pinion whereby said semi-circular wheel is rotated for disengagement with said bolt upon movement of said shaft to its door opening position.
  • a magnetic latch according to claim 1 wherein said bolt comprises a flat permanent magnet having a plateshaped pole piece on opposite sides of said permanent magnet, one said pole piece engaging said locking plate for tilting said bolt, and said one pole piece being included in said means for sliding said bolt within said guide.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lock And Its Accessories (AREA)
  • Sheet Holders (AREA)
  • Closing And Opening Devices For Wings, And Checks For Wings (AREA)
  • Hinges (AREA)
US441456A 1964-03-24 1965-03-22 Magnetic latch for a door Expired - Lifetime US3350127A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6403113A NL6403113A (de) 1964-03-24 1964-03-24

Publications (1)

Publication Number Publication Date
US3350127A true US3350127A (en) 1967-10-31

Family

ID=19789633

Family Applications (1)

Application Number Title Priority Date Filing Date
US441456A Expired - Lifetime US3350127A (en) 1964-03-24 1965-03-22 Magnetic latch for a door

Country Status (7)

Country Link
US (1) US3350127A (de)
BE (1) BE661485A (de)
DE (1) DE1975097U (de)
ES (1) ES310829A1 (de)
FR (1) FR1427487A (de)
GB (1) GB1105121A (de)
NL (1) NL6403113A (de)

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3480314A (en) * 1967-06-27 1969-11-25 Albert L Robinson Lock structure
US4826223A (en) * 1985-02-19 1989-05-02 Geringer Arthur V Electromagnetic door lock device
US4986581A (en) * 1990-04-16 1991-01-22 Arthur Geringer Electromagnetic door lock device
US5141271A (en) * 1991-09-23 1992-08-25 Arthur Geringer Alignment device for electromagnetic door lock
US20050184532A1 (en) * 2004-02-24 2005-08-25 D & D Technologies Self-latching magnetic latching device
US20050225098A1 (en) * 2004-04-12 2005-10-13 Christopher Kliefoth Magnetic latch system
US20080288043A1 (en) * 2005-05-04 2008-11-20 Jotec Gmbh Delivery system having a self-expanding braided stent
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
US7985382B1 (en) * 2006-05-31 2011-07-26 The United States Of America As Represented By The Secretary Of The Army Mobile all hazards receipt facility/analytical laboratory
USD647782S1 (en) 2011-02-04 2011-11-01 D&D Group Pty Ltd Latch
USD647779S1 (en) 2011-02-04 2011-11-01 D & D Group Pty Ltd Hinge
USD647781S1 (en) 2011-02-04 2011-11-01 D&D Group Pty Ltd Handle
USD649009S1 (en) 2011-02-07 2011-11-22 D & D Group Pty Ltd Hinge
USD649007S1 (en) 2011-02-04 2011-11-22 D & D Group Pty Ltd Hinge
USD649008S1 (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
US20130031942A1 (en) * 2010-02-16 2013-02-07 D & D Group Pty Ltd Magnetic gate latch
US9926729B2 (en) * 2016-01-06 2018-03-27 J & S Company Llc Retractable screen door handle assembly
IT201900001531A1 (it) * 2019-02-01 2020-08-01 Alban Giacomo Spa Dispositivo di chiusura ad induzione magnetica per serramenti e serramento
US10938149B2 (en) 2017-12-21 2021-03-02 Ideal Industries, Inc. Convertible force latching system
US11585132B2 (en) 2016-09-30 2023-02-21 Barrette Outdoor Living, Inc. Magnetic safety gate latch

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE216547C (de) *
US605170A (en) * 1898-06-07 Latch
US1087193A (en) * 1913-05-03 1914-02-17 Robert Lee Skinner Door-lock.
US2808281A (en) * 1956-01-04 1957-10-01 Clark Hartwell Magnetic latch
FR1302936A (fr) * 1960-10-18 1962-09-07 Fermeture loqueteau magnétique à deux aimants, inversant leurs pôles
US3129968A (en) * 1961-03-15 1964-04-21 Percy R Graham Latches and locks
US3188840A (en) * 1963-11-04 1965-06-15 Wartian Lock Co Door latch and lock

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE216547C (de) *
US605170A (en) * 1898-06-07 Latch
US1087193A (en) * 1913-05-03 1914-02-17 Robert Lee Skinner Door-lock.
US2808281A (en) * 1956-01-04 1957-10-01 Clark Hartwell Magnetic latch
FR1302936A (fr) * 1960-10-18 1962-09-07 Fermeture loqueteau magnétique à deux aimants, inversant leurs pôles
US3129968A (en) * 1961-03-15 1964-04-21 Percy R Graham Latches and locks
US3188840A (en) * 1963-11-04 1965-06-15 Wartian Lock Co Door latch and lock

Cited By (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3480314A (en) * 1967-06-27 1969-11-25 Albert L Robinson Lock structure
US4826223A (en) * 1985-02-19 1989-05-02 Geringer Arthur V Electromagnetic door lock device
US4986581A (en) * 1990-04-16 1991-01-22 Arthur Geringer Electromagnetic door lock device
US5141271A (en) * 1991-09-23 1992-08-25 Arthur Geringer Alignment device for electromagnetic door lock
US20080296915A1 (en) * 2004-02-24 2008-12-04 D & D Group Pty Limited Magnetic latch
US7390035B2 (en) * 2004-02-24 2008-06-24 D&D Group Pty Limited Self-latching magnetic latching device
US20050184532A1 (en) * 2004-02-24 2005-08-25 D & D Technologies Self-latching magnetic latching device
US9790708B2 (en) 2004-02-24 2017-10-17 D & D Group Pty. Ltd. Magnetic latch
US20050225098A1 (en) * 2004-04-12 2005-10-13 Christopher Kliefoth Magnetic latch system
US7044511B2 (en) 2004-04-12 2006-05-16 Nationwide Industries Magnetic latch system
US20080288043A1 (en) * 2005-05-04 2008-11-20 Jotec Gmbh Delivery system having a self-expanding braided stent
US8043353B2 (en) 2005-05-04 2011-10-25 Jotec Gmbh Delivery system having a self-expanding braided stent
US7985382B1 (en) * 2006-05-31 2011-07-26 The United States Of America As Represented By The Secretary Of The Army Mobile all hazards receipt facility/analytical laboratory
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
US20130031942A1 (en) * 2010-02-16 2013-02-07 D & D Group Pty Ltd Magnetic gate latch
US8959966B2 (en) * 2010-02-16 2015-02-24 D & D Group Pty. Ltd. Magnetic gate latch
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
USD649008S1 (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
USD649007S1 (en) 2011-02-04 2011-11-22 D & D Group Pty Ltd Hinge
USD647781S1 (en) 2011-02-04 2011-11-01 D&D Group Pty Ltd Handle
USD675080S1 (en) 2011-02-04 2013-01-29 D & D Group Pty Ltd Handle
USD649009S1 (en) 2011-02-07 2011-11-22 D & D Group Pty Ltd Hinge
US9926729B2 (en) * 2016-01-06 2018-03-27 J & S Company Llc Retractable screen door handle assembly
US11585132B2 (en) 2016-09-30 2023-02-21 Barrette Outdoor Living, Inc. Magnetic safety gate latch
US10938149B2 (en) 2017-12-21 2021-03-02 Ideal Industries, Inc. Convertible force latching system
US11539161B2 (en) 2017-12-21 2022-12-27 Ideal Industries, Inc. Convertible force latching system
IT201900001531A1 (it) * 2019-02-01 2020-08-01 Alban Giacomo Spa Dispositivo di chiusura ad induzione magnetica per serramenti e serramento

Also Published As

Publication number Publication date
ES310829A1 (es) 1965-06-01
FR1427487A (fr) 1966-02-04
NL6403113A (de) 1965-09-27
GB1105121A (en) 1968-03-06
BE661485A (de) 1900-01-01
DE1975097U (de) 1967-12-14

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