GB954370A - Permanent magnet lifting device - Google Patents

Permanent magnet lifting device

Info

Publication number
GB954370A
GB954370A GB25054/60A GB2505460A GB954370A GB 954370 A GB954370 A GB 954370A GB 25054/60 A GB25054/60 A GB 25054/60A GB 2505460 A GB2505460 A GB 2505460A GB 954370 A GB954370 A GB 954370A
Authority
GB
United Kingdom
Prior art keywords
magnetic
magnets
housing
side walls
flux
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
Application number
GB25054/60A
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.)
O S WALKER CO Inc
Original Assignee
O S WALKER CO Inc
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 O S WALKER CO Inc filed Critical O S WALKER CO Inc
Publication of GB954370A publication Critical patent/GB954370A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/02—Permanent magnets [PM]
    • H01F7/0231—Magnetic circuits with PM for power or force generation
    • H01F7/0252—PM holding devices
    • H01F7/0257—Lifting, pick-up magnetic objects
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/02—Permanent magnets [PM]
    • H01F7/04—Means for releasing the attractive force

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Load-Engaging Elements For Cranes (AREA)

Abstract

954,370. Magnetic holding devices. O. S. WALKER CO. Inc. July 18, 1960 [Feb. 12, 1960], No. 25054/60. Heading H1P. A magnetic lifting device comprises a housing with a work-supporting surface having mounted in the housing a permanent magnet or magnets and a movable flux-conducting member forming a part of the magnetic circuit so that when the said member is moved relative to the housing, the reluctance of the magnetic circuit is increased, resulting in work release. The housing 10 consists of a pair of magnetic rectangular side walls 12, non-magnetic end walls 14 and a magnetic top plate 16. The work supporting surface which may be flat or curved comprises pole faces 18, 19 and 24, being the lower surfaces of the side walls 12 and a flux conductive member 22 respectively, and non-magnetic members 20 separating the pole faces. Within the housing 10 are mounted permanent magnets 40, for example of ceramic material, moved through a lost motion connection comprising a pin 44, the ends of which engage in recesses 46 in the polepieces 42 by a flux conducting member 30. As member 30 is raised by a crank member 34 with wrench engageable portion 36, surfaces 26 and 28 first part, and then magnets 40 move up to flux shunting plate 16, weakening the flux and resulting in work release. Non-magnetic pins 48 on polepieces 41 carried by magnets 40 prevent their engagement with plate 16. In a modification the magnets 40, and the polepiece 41 and 42 are fixed relative to the side walls 12, the member 30 carrying the stop member 48 (Fig. 4, not shown). In modifications, spring 56 urges members 30, 22 apart and spring 58 prevents engagement of member 30 with plate 16; no lost motion mechanism is provided; the magnets are fixed directly to member 30 or side walls 12, the inner or outer polepieces being replaced by thin magnetic shields 54, Fig. 5 (Fig. 9, not shown). In another modification the side walls 12 have a central portion of non-magnetic material (Fig. 6, not shown). The area of contact between surfaces 26 and 28 may be increased (Figs. 7, 8, not shown). In a further embodiment, the outer walls 12, the magnets 40 and member 30 are cylindrical in shape, Fig. 10.
GB25054/60A 1960-02-12 1960-07-18 Permanent magnet lifting device Expired GB954370A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US8352A US3079191A (en) 1960-02-12 1960-02-12 Permanent magnet lifting device

Publications (1)

Publication Number Publication Date
GB954370A true GB954370A (en) 1964-04-08

Family

ID=21731142

Family Applications (1)

Application Number Title Priority Date Filing Date
GB25054/60A Expired GB954370A (en) 1960-02-12 1960-07-18 Permanent magnet lifting device

Country Status (2)

Country Link
US (1) US3079191A (en)
GB (1) GB954370A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4726588A (en) * 1986-08-18 1988-02-23 Balls-N-Bars, Inc. Magnetic detent device and puzzle game device
EP0280435A2 (en) * 1987-02-24 1988-08-31 Richard Edward Thomson Adjustable quick release magnetic holding assembly
WO1996007610A1 (en) * 1994-09-02 1996-03-14 University College Cardiff Consultants Limited Lifting apparatus
CN106082013A (en) * 2016-06-22 2016-11-09 上海交通大学 A kind of machinery for kicker magnet adhesive, separation and position adjustment

Families Citing this family (39)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3246907A (en) * 1964-01-07 1966-04-19 Douglas S Chisholm Magnetic ski binding or harness
US3241220A (en) * 1963-05-22 1966-03-22 Stanley Works Joint preassembling jig
US3257141A (en) * 1963-06-17 1966-06-21 Indiana General Corp Magnetic transfer device
US3198566A (en) * 1963-07-17 1965-08-03 Eriez Mfg Co Material lifting device
US3300065A (en) * 1963-07-18 1967-01-24 Tri Valley Growers Means for material handling
US3250962A (en) * 1964-01-15 1966-05-10 Wehr Steel Company Permanent magnet lifting device
US3277415A (en) * 1964-07-02 1966-10-04 Spodig Heinrich Magnetic retriever
DE1552887A1 (en) * 1965-05-03 1971-07-22 Gulley John M Machining device
US3477050A (en) * 1968-02-13 1969-11-04 Wehr Corp Latch assembly for material handling magnet
US3907267A (en) * 1971-12-01 1975-09-23 Kelvinator Inc Apparatus for assembly of evaporator tubing to liner
JPS52166269U (en) * 1976-06-10 1977-12-16
JPS545272U (en) * 1977-06-15 1979-01-13
US4238095A (en) * 1978-02-14 1980-12-09 Hov-Air-Ship, Inc. Method of and apparatus for anchoring airships and propulsion means for airships
JPS54170586U (en) * 1978-05-22 1979-12-01
US4401960A (en) * 1979-12-18 1983-08-30 Kanetsu Kogyo Kabushiki Kaisha Magnet assembly
US4462726A (en) * 1981-06-08 1984-07-31 Irontite Products Co., Inc. Apparatus for forming a groove
FR2558404B1 (en) * 1983-12-23 1986-12-19 Citroen Sa MAGNETIC ROBOT WRIST
JPH053508Y2 (en) * 1987-06-26 1993-01-27
JP2616013B2 (en) * 1989-06-15 1997-06-04 株式会社村田製作所 Magnet chuck
US5845950A (en) * 1996-08-20 1998-12-08 Industrial Magnetics, Inc. Pneumatically actuated magnetic article holder
US6086125A (en) * 1997-11-05 2000-07-11 Daimlerchrysler Corporation Magnetic holding device
US6015175A (en) * 1997-11-05 2000-01-18 Chrysler Corporation Magnetic holding device
US5993365A (en) * 1998-03-26 1999-11-30 Eastman Kodak Company Tool attachment and release device for robotic arms
US6168221B1 (en) 1999-03-17 2001-01-02 Daimlerchrysler Corporation Magnetic carrier
US6283000B1 (en) 2000-02-07 2001-09-04 Hughes, Iii Odie L. Fluid actuated, magnetic bar stock puller
US20040071539A1 (en) * 2002-07-03 2004-04-15 Anater Raymond J. Automated container management system
US8292275B2 (en) * 2009-09-23 2012-10-23 General Electric Company Magnetic clip assembly for manufacture of dynamoelectric machine
TW201313593A (en) * 2011-09-23 2013-04-01 Askey Technology Jiang Su Ltd Method for transferring substrate modules, and magnetic sheet applied for the method
US9689527B2 (en) * 2013-03-15 2017-06-27 Lee Christopher Franklin Mounting apparatus
KR101500385B1 (en) * 2013-12-31 2015-03-09 현대자동차 주식회사 Handling apparatus for moving part
JP6514219B2 (en) * 2014-01-30 2019-05-15 イクストゥール オイＩｘｔｕｒ Ｏｙ magnet
FI20145100L (en) 2014-01-30 2015-07-31 Ixtur Oy Magnet
JP2016041622A (en) * 2014-08-18 2016-03-31 有限会社高野熔接工業所 Magnetic attraction device
WO2019034745A1 (en) * 2017-08-16 2019-02-21 Magnetbau Schramme Gmbh & Co. Kg Holding magnet
US11780039B2 (en) 2018-01-29 2023-10-10 Magswitch Technology, Inc. Magnetic lifting device having pole shoes with spaced apart projections
JP2019186325A (en) * 2018-04-05 2019-10-24 Smc株式会社 Magnet chuck
JP7166529B2 (en) * 2018-04-05 2022-11-08 Smc株式会社 magnet chuck
US11367549B2 (en) * 2019-02-27 2022-06-21 Dj Squared, Inc. Releasable magnetic coupler
US11830671B2 (en) 2020-12-03 2023-11-28 Lantha Tech Ltd. Methods for generating directional magnetic fields and magnetic apparatuses thereof

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2915682A (en) * 1956-01-26 1959-12-01 Neill James & Co Sheffield Ltd Lifting magnets

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4726588A (en) * 1986-08-18 1988-02-23 Balls-N-Bars, Inc. Magnetic detent device and puzzle game device
EP0280435A2 (en) * 1987-02-24 1988-08-31 Richard Edward Thomson Adjustable quick release magnetic holding assembly
EP0280435A3 (en) * 1987-02-24 1989-09-13 Richard Edward Thomson Adjustable quick release magnetic holding assembly
WO1996007610A1 (en) * 1994-09-02 1996-03-14 University College Cardiff Consultants Limited Lifting apparatus
CN106082013A (en) * 2016-06-22 2016-11-09 上海交通大学 A kind of machinery for kicker magnet adhesive, separation and position adjustment

Also Published As

Publication number Publication date
US3079191A (en) 1963-02-26

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