US3577583A - Magnetic clamp - Google Patents

Magnetic clamp Download PDF

Info

Publication number
US3577583A
US3577583A US780016A US3577583DA US3577583A US 3577583 A US3577583 A US 3577583A US 780016 A US780016 A US 780016A US 3577583D A US3577583D A US 3577583DA US 3577583 A US3577583 A US 3577583A
Authority
US
United States
Prior art keywords
base member
clamp
body member
base
magnetic means
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
US780016A
Other languages
English (en)
Inventor
Willard R Amann
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.)
Eastman Kodak Co
Original Assignee
Eastman Kodak Co
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 Eastman Kodak Co filed Critical Eastman Kodak Co
Application granted granted Critical
Publication of US3577583A publication Critical patent/US3577583A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42F—SHEETS TEMPORARILY ATTACHED TOGETHER; FILING APPLIANCES; FILE CARDS; INDEXING
    • B42F9/00—Filing appliances with devices clamping file edges; Covers with clamping backs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42F—SHEETS TEMPORARILY ATTACHED TOGETHER; FILING APPLIANCES; FILE CARDS; INDEXING
    • B42F1/00—Sheets temporarily attached together without perforating; Means therefor
    • B42F1/02—Paper-clips or like fasteners
    • 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
    • Y10T24/00—Buckles, buttons, clasps, etc.
    • Y10T24/32—Buckles, buttons, clasps, etc. having magnetic fastener

Definitions

  • a clamp for releasably holding sheet material includes a rigid base of nonmagnetic material and an elongated strip of flexible material.
  • the base carries a permanent magnet at one end, and the elongated strip is attached to the other end of the base and carries a second permanent magnet overlying the permanent magnet in the base.
  • a recess is formed in the base underlying the central portion of the strip in such a manner that, by depressing that portion of the strip, the magnets are caused to part permitting insertion or removal of a piece of sheet material.
  • This invention relates to holders for sheet material and more particularly to clamps for releasably holding sheet material by magnetic means.
  • Clamps for releasably holding sheet material are well known and commonly employ spring devices which rely upon the spring force to secure the sheet.
  • the force of the spring must be sufficient to firmly grasp the workpiece. Since the spring force remains applied while the clamp is open, the operator is required to maintain opening pressure while the sheet material is being inserted or withdrawn.
  • such devices are commonly provided with relatively long lever arms to produce sufficient mechanical advantage whereby the closing force of the spring can be overcome .with only slight effort. As a result, the travel length of the opening lever is great,
  • the foregoing clamp includes a permanent magnethaving two faces in obtuse angular relationship permittingthe clamp to be rocked about the intersection of the faces to raise-one face from the clipboard surface, thereby permitting the insertion of a sheet of paper.
  • the clamp is magnetically held .inthis open position until closing pressure is applied. While such a clamp serves its intended function of permitting.orie-handedoperation while the clipboard is resting on a surface, it would not be suitable for similar one-handed use where the'entire structure ishand held since opening pressure is applied to one point and closing pressure is applied to another, resulting in the need to shift ones grip to close the clamp.
  • a clamp in accordance with a preferred embodiment of the invention, includes an elongated base having a permanent magnet at one end, means for suspending it from a-track at the other end and a recess therebetween.
  • Aflat strip of resilient material is carried by the base and spans the recess.
  • a second permanent magnet attached to the strip overlies the'magnet in the base to securely hold a piece of sheet material placed between the magnets.
  • One edge of the magnet attachedto the strip forms a fulcrum about whichithe magnet may be pivoted by depression of the strip in the region of the recess, permitting insertion or removal of a piece of sheet material; The clamp retums to its closed position when opening pressure is removed.
  • FIG. I is a perspective view showing the clamp of the present invention.
  • FIG. 2 is a perspective view showing the operation of the.
  • FIG. 3 is a segmental view of the clamp taken along line 3-3 of FIG. I;
  • FIG. 4 is a fragmentary view showing the method of mounting the clamp shown in FIG. I. t f
  • a clamp I0 having material and a flexible body member 14 of nonmagnetic material such as plastic.
  • a flexible body member 14 of nonmagnetic material such as plastic.
  • base member 12 and body member 14 will readily occur to those skilled in the art.
  • Base 12 is formed with a recess 16 at one end into which a permanent magnet 18 is secured by suitable means. Another recess 20 is formed in the central region of base 12 adjacent magnet 18. The opposed end of base 12 is provided with an upstanding projection 22 and a suspension device 24 to be more fully described below.
  • body member 14 is attached to upstanding projection 22 of base I2 by suitable means such as conventional canoe clips 26 and abuts a projection 27 provided for alignment purposes.
  • the other end of body member 14 carries a spacer 28 of nonmagnetic material and a permanent magnet 30 overlying magnet 18.
  • Spacer 28 is provided to prevent magnet 30 from attracting adjacent clamps of similar construction.
  • the spacer may be bonded to body member 14 as shown or formed as an integral molding. Of course spacer 28 may be omitted in cases .where the clamp is not intended for use near other magnetic materials.
  • magnet 30 is somewhat shorter than magnet 18 to provide a corner or fulcrum 32 about which it may be pivoted in a manner to be described.
  • Track 34 has a generally semicylindrical lower portion 36 with a flat upper surface 38.
  • a flange 40 extends from upper surface 38 and is supported by a plurality of brackets, one of which is shown at OPERATION
  • clamp 10 may be grasped withone hand.
  • finger depression of resilient body member 14 in the region of recess 20 causes attached magnet 30 to rotate about its rear corner 32, parting the bottom surface of that magnet from the top surface of magnet 18 sufficiently to pennit insertion of a piece of sheet material. Once the magnets are parted, only slight pressure is required to hold them apart since the attractive force of the magnets decreases as they separate.
  • body member 14 After insertion of the sheet material, body member 14 is released and returns to its original configuration as shown in FIG. I, firmly clamping the sheet material between magnets 18 and 30. Clamp 10 can now be suspended from track 34 in the manner described above and stored or moved along to the next station.
  • the sheet can be released in a similar manner by merely grasping the clamp in one hand and depressing body member 14 with a finger, or the sheet material can be pulled from between magnets 18 and 30 without depressing body member 14 or touching the suspended clamp.
  • the loading and unloading may easily be carried out while the clamp is suspended from track 34.
  • the present in vention provides a clamp which may be 'readily held and opened with one hand and which may be held'open with only slight pressure. Further, the clamp may be closed simply by reference to the preferred embodiment thereof, but it will be understood that variations and modifications can be efiected within the spirit and scope of the invention. For instance, magnet 30 need not be shorter than magnet 18 as the corner of either magnet can form the fulcrum. lf magnet 30 were the same length as magnet 18, magnet 30 would slide over the comer of magnet 18, making that comer the fulcrum.
  • a base member defining an edge, there being a hole having an inner surface and extending through said base member, and there being a slot extending from said hole to the edge whereby said device may be suspended from the track with the inner surface of said hole resting on the horizontal surface of the track and with the flange of the track extending through said slot;
  • a body member overlying said base member and having opposed portions, one of said portions being connected to. said base member; and i c. magnetic means carried by said members for releasably holding the other of said portions to said base member.
  • a clamp for releasably retaining a workpiece comprising:
  • a base member a base member at least partially formed of flexible material
  • said base and body members define a space between said one portion and said magnetic means into which said body member can be flexed, and a fulcrum about which said other portion is pivotable in response to the flexing of said base member for separating said other portion from said base member to release a retained workpiece.
  • said body member is a flat strip which can be flexed into said space;
  • said space is a recess located in said base member between said one portion and said magnetic means and adjacent said body member;
  • said magnetic means includes a permanent magnet carried by said other po'rtionof said body member, said magnet having an edge which defines said fulcrum, whereby said body member can be flexed into said recess to cause said other portion to pivot about said'fulcrum to separate said other portion from said base.
  • a clamp for releasably retaining a workpiece comprising: v 3
  • ' a. a base member
  • c. means earned-by said members for exerting a magnetic force urging said body member in a first direction against said base member for releasably retaining the workpiece between said body member and said base member,
  • said body member being movable against the force of said magnetic means in a second direction substantially opposite to said first direction to separate at least a portion of said body member from said base member.
  • said body member has opposed portions
  • said magnetic means releasably holds one of said portions against said base member
  • one of said members includes a fulcrum about which at least a section of said body member is adapted to pivot to move said one portion from said base member in said second direction against the force of said magnetic means.
  • said body member is at least partially formed of resilient material and has opposed portions;
  • said magnetic means releasably holds one of said portions to said base member
  • one of said members includes a fulcrum about which at least a section of said body member is adapted to pivot to move said one portion from said base member in said second direction against the force of said magnetic means.
  • said body member has opposed portions
  • said magnetic means releasably holds one of said portions against said base member
  • one of said members includes a fulcrum about which at least a section of said body member is adapted to pivot to move said one portion from said base member against the force of said magnetic means;
  • said base member has an edge and is adapted to ride on and travel along a suspended track having a flat, horizontal clamp-supporting surface and a central, upstanding flange extending from the surface, said clamp further comprising:

Landscapes

  • Clamps And Clips (AREA)
  • Conveying Record Carriers (AREA)
US780016A 1968-11-29 1968-11-29 Magnetic clamp Expired - Lifetime US3577583A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US78001668A 1968-11-29 1968-11-29

Publications (1)

Publication Number Publication Date
US3577583A true US3577583A (en) 1971-05-04

Family

ID=25118301

Family Applications (1)

Application Number Title Priority Date Filing Date
US780016A Expired - Lifetime US3577583A (en) 1968-11-29 1968-11-29 Magnetic clamp

Country Status (4)

Country Link
US (1) US3577583A (de)
DE (1) DE6945719U (de)
FR (1) FR2024518A1 (de)
GB (1) GB1228689A (de)

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5322023A (en) * 1993-04-16 1994-06-21 Hammond Timothy R Table tray adapted for installation around an umbrella pole
US5517722A (en) * 1993-03-29 1996-05-21 Bender; Lillian M. Curtain holder
US6170132B1 (en) * 1999-09-01 2001-01-09 Lucent Technologies Inc. Magnetic laser bar clamp
US6760956B1 (en) 2002-03-05 2004-07-13 Edmond Ken Lee Putter towel clip
US7065839B2 (en) * 2001-10-23 2006-06-27 Just George J Magnetic bookmark utilizing built-in fulcrum and levers
WO2008005370A2 (en) * 2006-06-30 2008-01-10 Cvdevices, Llc Homeostatic tissue apparatus
WO2008005385A2 (en) * 2006-06-30 2008-01-10 Cvdevices, Llc Atraumatic clamp
US20090316260A1 (en) * 2008-05-08 2009-12-24 Alex Howes Projection Screen and Method of Constructions
US20120060332A1 (en) * 2010-09-14 2012-03-15 Mitchell Lucy A Hook with magnetic closure
US8137379B2 (en) 2010-05-03 2012-03-20 Josiah Labash Pressure-applying device
US20130310851A1 (en) * 2008-02-18 2013-11-21 Covidien Lp Magnetic Clip for Implant Deployment Device
US20140250640A1 (en) * 2012-09-20 2014-09-11 4Jc's Development, Llc Device for securing an article of clothing
US9032594B1 (en) * 2010-09-14 2015-05-19 Lucy A. Mitchell Hook with magnetic closure
US9080595B1 (en) * 2010-09-14 2015-07-14 Lucy A. Mitchell Hook with magnetic closure
US20150322996A1 (en) * 2010-09-14 2015-11-12 Lucy A. Mitchell Hook with magnetic closure
US9752262B1 (en) * 2014-03-14 2017-09-05 John D. Martelli Quick quilt attachment apparatus and method
US10288982B2 (en) 2008-12-02 2019-05-14 Musion Ip Limited Mobile studio
US10447967B2 (en) 2008-07-14 2019-10-15 Musion Ip Ltd. Live teleporting system and apparatus
WO2019171317A3 (en) * 2018-03-09 2019-10-17 Bacon, Brian Magnetic hanger system

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT209050Z2 (it) * 1986-12-19 1988-09-02 Effelle S A S Di Fioratti Luis Portacarte con dispositivo di ritegno magnetico
DE102005038671A1 (de) * 2005-08-16 2007-02-22 Voith Patent Gmbh Vorrichtung zum Führen einer Bahn

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1877849A (en) * 1931-09-23 1932-09-20 Multipost Co Stamp affixing machine
US2601424A (en) * 1949-09-17 1952-06-24 Craig C Baker Tie holder
FR1216408A (fr) * 1958-11-24 1960-04-25 Nouveau système de tringle pour rideaux et voilages
US3097406A (en) * 1960-08-24 1963-07-16 Le Roy W Yarborough Article holder
CH407444A (de) * 1964-03-23 1966-02-15 Mueller Guido Serviettenhalter

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1877849A (en) * 1931-09-23 1932-09-20 Multipost Co Stamp affixing machine
US2601424A (en) * 1949-09-17 1952-06-24 Craig C Baker Tie holder
FR1216408A (fr) * 1958-11-24 1960-04-25 Nouveau système de tringle pour rideaux et voilages
US3097406A (en) * 1960-08-24 1963-07-16 Le Roy W Yarborough Article holder
CH407444A (de) * 1964-03-23 1966-02-15 Mueller Guido Serviettenhalter

Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5517722A (en) * 1993-03-29 1996-05-21 Bender; Lillian M. Curtain holder
US5322023A (en) * 1993-04-16 1994-06-21 Hammond Timothy R Table tray adapted for installation around an umbrella pole
US5493976A (en) * 1993-04-16 1996-02-27 Hammond; Timothy R. Table tray adapted for installation around an umbrella pole
US6170132B1 (en) * 1999-09-01 2001-01-09 Lucent Technologies Inc. Magnetic laser bar clamp
US7065839B2 (en) * 2001-10-23 2006-06-27 Just George J Magnetic bookmark utilizing built-in fulcrum and levers
US6760956B1 (en) 2002-03-05 2004-07-13 Edmond Ken Lee Putter towel clip
WO2008005370A2 (en) * 2006-06-30 2008-01-10 Cvdevices, Llc Homeostatic tissue apparatus
WO2008005385A2 (en) * 2006-06-30 2008-01-10 Cvdevices, Llc Atraumatic clamp
WO2008005385A3 (en) * 2006-06-30 2008-11-20 Cvdevices Llc Atraumatic clamp
WO2008005370A3 (en) * 2006-06-30 2008-11-27 Cvdevices Llc Homeostatic tissue apparatus
US20090177211A1 (en) * 2006-06-30 2009-07-09 Kassab Ghassan S Homeostatic tissue apparatus
US8246639B2 (en) 2006-06-30 2012-08-21 Kassab Ghassan S Atraumatic clamp
US7998153B2 (en) 2006-06-30 2011-08-16 Cvdevices, Llc Homeostatic tissue apparatus
US9044235B2 (en) * 2008-02-18 2015-06-02 Covidien Lp Magnetic clip for implant deployment device
US20130310851A1 (en) * 2008-02-18 2013-11-21 Covidien Lp Magnetic Clip for Implant Deployment Device
US8149509B2 (en) * 2008-05-08 2012-04-03 Musion Ip Limited Projection screen and method of constructions
US20090316260A1 (en) * 2008-05-08 2009-12-24 Alex Howes Projection Screen and Method of Constructions
US10447967B2 (en) 2008-07-14 2019-10-15 Musion Ip Ltd. Live teleporting system and apparatus
US10288982B2 (en) 2008-12-02 2019-05-14 Musion Ip Limited Mobile studio
US8137379B2 (en) 2010-05-03 2012-03-20 Josiah Labash Pressure-applying device
US9032594B1 (en) * 2010-09-14 2015-05-19 Lucy A. Mitchell Hook with magnetic closure
US9080595B1 (en) * 2010-09-14 2015-07-14 Lucy A. Mitchell Hook with magnetic closure
US20150322996A1 (en) * 2010-09-14 2015-11-12 Lucy A. Mitchell Hook with magnetic closure
US9777763B2 (en) * 2010-09-14 2017-10-03 Lucy A. Mitchell Hook with magnetic closure
US8448307B2 (en) * 2010-09-14 2013-05-28 Lucy A. Mitchell Hook with magnetic closure
US20120060332A1 (en) * 2010-09-14 2012-03-15 Mitchell Lucy A Hook with magnetic closure
US20140250640A1 (en) * 2012-09-20 2014-09-11 4Jc's Development, Llc Device for securing an article of clothing
US9752262B1 (en) * 2014-03-14 2017-09-05 John D. Martelli Quick quilt attachment apparatus and method
WO2019171317A3 (en) * 2018-03-09 2019-10-17 Bacon, Brian Magnetic hanger system

Also Published As

Publication number Publication date
GB1228689A (de) 1971-04-15
DE6945719U (de) 1970-04-02
FR2024518A1 (de) 1970-08-28

Similar Documents

Publication Publication Date Title
US3577583A (en) Magnetic clamp
US4222489A (en) Clamping devices
US5116012A (en) Clip board
US4957205A (en) Computer disk holder
JPH03148485A (ja) ディスク格納カセット
US4353157A (en) Clip driver
US3062217A (en) Index tab holder
US3041696A (en) Snap-on hanger clothespin
JPS61167936A (ja) フイルムスライドを保持するための一体型プラスチツクフレーム
US2912113A (en) Card holder
US5624027A (en) Apparatus for securing a computer diskette to an object
US2893564A (en) Holder for bow ties and the like
US4138818A (en) Drawing board
JPS61137306A (ja) マグネツト　クリツプ
US2454668A (en) Sandpaper holder
JP2597192Y2 (ja) 用箋挾
US3165104A (en) Suspension filing system for folders and other document containers
US3610424A (en) Cassette holder
US2425603A (en) Film hanger
US3129695A (en) Line guide
JPS63138988A (ja) 光学的に読取り得るディスクのパッケージ
JPS6347512Y2 (de)
US1423206A (en) Phonograph record
TWM563354U (zh) 磁性夾具之結構
US2796646A (en) Clip