US3109967A - Permanent magnetic chuck with nonmagnetic barrier channel for holding magnetic pack - Google Patents

Permanent magnetic chuck with nonmagnetic barrier channel for holding magnetic pack Download PDF

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Publication number
US3109967A
US3109967A US201459A US20145962A US3109967A US 3109967 A US3109967 A US 3109967A US 201459 A US201459 A US 201459A US 20145962 A US20145962 A US 20145962A US 3109967 A US3109967 A US 3109967A
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magnetic
pack
grid
holding
barrier channel
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US201459A
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Albert T Churchill
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
    • B23Q3/15—Devices for holding work using magnetic or electric force acting directly on the work
    • B23Q3/154—Stationary devices
    • B23Q3/1546—Stationary devices using permanent magnets
    • 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
    • Y10T279/00—Chucks or sockets
    • Y10T279/23—Chucks or sockets with magnetic or electrostatic means

Definitions

  • An object of the invention is to provide a magnetic work holder containing in addition to the conventional parts, a barrier member of non-magnetic material which insures maximum shut-off of magnetic flow between magnetic blocks and pole pieces of a magnetic pack and the magnetic strips of a grid or cover.
  • FIG. 1 is a longitudinal section view of a magnetic holder of the invention, as if on line ll-l of FIG. 2.
  • FIG. 2 is a transverse View as if on line 2-2 of FIG. 1.
  • FIG. 3 is a top plan view.
  • the attached drawing shows a magnetic Work holder having a non-magnetic, such as aluminum, casing which receives the parts of the work holder and whose open top is covered by a fixed grid or cover ll.
  • the latter has alternate magnetic and non-magnetic transverse strips 13 and 14.
  • a longitudinally shiftable assembly which is generally called a magnetic pack 15 which includes alternate block magnets 16 and magnetic pole pieces 17.
  • the polarity of magnets 16 is indicated by letters N-S on FIG. 1.
  • the magnetic pole pieces 17 of the box fit with close clearance against the underside of the grid or cover, but the magnets 16 between the pole pieces 17 have their upper ends spaced considerably from the under side of the grid.
  • the novel element in the combination is the non-magnetic barrier 18.
  • This is formed of non-magnetic steel and is in the form of an open top channel, in which the pack 15 is securely and fixedly mounted as by a friction fit so that the barrier 18 and the pack 15 are shiftable as a unit for aligning or misaligning the pole pieces 17 with the magnetic strips 13 of the grid or cover.
  • the work holder is intended to release the Work lying on the grid.
  • the barrier 18 of non-magnetic material between the magnetic bottom plate Eli and the magnetic pack 15 operates to insure maximum shut-off of magnetic flow between the pole pieces 17 and the magnetic strips 13 of the grid.
  • a magnetic Workholder comprising an open top casing; a fixed grid on said casing having alternate magnetic and non-magnetic transverse strips; a fixed magnetic bottom plate on the bottom of the casing; and a longitudinally shiftable magnetic pack in said casing on said magnetic bottom plate comprising alternate block magnets and magnetic pole pieces;
  • the improvement comprising a non-magnetic barrier under said pack and located between the pack and the magnetic bottom plate;
  • saidbarrier being in the form of an open top channel in which the pack is securely and fixedly mounted so that the barrier and pack form a unit and shift together.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Magnetic Treatment Devices (AREA)

Description

Nov. 5, 196
3 A. T. CHURCHILL 3,109,967 PERMANENT MAGNETIC CHUCK WITH NON-MAGNETIC BARRIER CHANNEL FOR HOLDING MAGNETIC PACK Filed June 11, 1962 INVENTOR. ALBERT T. CHURCHILL ATTORNEYS United States Patent "ice PERMANENT MAGNETEQ QHUCK WETH NBN- MAGNETIC BARRIER CHANNEL FUR HGLD- Elf; MAGNE'IHQ PACK Alberti. Qhnrchill, 1447 E. 8 Mile Road, Hazel Park, Mich. Filed lune 11, 1962, Ser. No. 201,459 1 Claim. (Cl. 317-459) This application relates to work holders known as magnetic work holders, one example of which is shown in the patent to Bower No. 2,053,177.
An object of the invention is to provide a magnetic work holder containing in addition to the conventional parts, a barrier member of non-magnetic material which insures maximum shut-off of magnetic flow between magnetic blocks and pole pieces of a magnetic pack and the magnetic strips of a grid or cover.
Further objects and advantages of the magnetic Work holder disclosed in the appended drawing may be obtained by reference to the following description which refers to such drawing.
In such drawing:
FIG. 1 is a longitudinal section view of a magnetic holder of the invention, as if on line ll-l of FIG. 2.
FIG. 2 is a transverse View as if on line 2-2 of FIG. 1.
FIG. 3 is a top plan view.
The attached drawing shows a magnetic Work holder having a non-magnetic, such as aluminum, casing which receives the parts of the work holder and whose open top is covered by a fixed grid or cover ll. The latter has alternate magnetic and non-magnetic transverse strips 13 and 14. Inside the casing and under the grid 11 is a longitudinally shiftable assembly which is generally called a magnetic pack 15 which includes alternate block magnets 16 and magnetic pole pieces 17. The polarity of magnets 16 is indicated by letters N-S on FIG. 1.
The magnetic pole pieces 17 of the box fit with close clearance against the underside of the grid or cover, but the magnets 16 between the pole pieces 17 have their upper ends spaced considerably from the under side of the grid.
Within the casing are provided means of conventional form not here disclosed for longitudinally shifting the pack.
Under the pack 15 is a non-magnetic barrier 18.
3-,1ll9,95? Patented Nov. 5, 1.963
Under the barrier 18 and fixed upon the bottom of the casing is a magnetic bottom plate 20. The open top casing 19 which receives all of the foregoing parts is covered by the grid or cover 11.
With the exception of the non-magnetic barrier 18 under the movable pack, all of the foregoing parts and the combination thereof are acknowledged to be old.
The novel element in the combination is the non-magnetic barrier 18. This is formed of non-magnetic steel and is in the form of an open top channel, in which the pack 15 is securely and fixedly mounted as by a friction fit so that the barrier 18 and the pack 15 are shiftable as a unit for aligning or misaligning the pole pieces 17 with the magnetic strips 13 of the grid or cover. When the magnetic pack 15 is moved longitudinally to misalign the pole pieces 17 with the magnetic strips 13 of the grid and to align the pole pieces 17 with the non-magnatic strips Id of the grid, the work holder is intended to release the Work lying on the grid. The barrier 18 of non-magnetic material between the magnetic bottom plate Eli and the magnetic pack 15 operates to insure maximum shut-off of magnetic flow between the pole pieces 17 and the magnetic strips 13 of the grid.
Now having described the magnetic work holder herein disclosed, reference should be had to the claims which follow.
I new claim:
In a magnetic Workholder comprising an open top casing; a fixed grid on said casing having alternate magnetic and non-magnetic transverse strips; a fixed magnetic bottom plate on the bottom of the casing; and a longitudinally shiftable magnetic pack in said casing on said magnetic bottom plate comprising alternate block magnets and magnetic pole pieces;
the improvement comprising a non-magnetic barrier under said pack and located between the pack and the magnetic bottom plate;
saidbarrier being in the form of an open top channel in which the pack is securely and fixedly mounted so that the barrier and pack form a unit and shift together.
Edgar Ian. 6, 1942 Watelet Aug. 2, 1960
US201459A 1962-06-11 1962-06-11 Permanent magnetic chuck with nonmagnetic barrier channel for holding magnetic pack Expired - Lifetime US3109967A (en)

Priority Applications (1)

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US201459A US3109967A (en) 1962-06-11 1962-06-11 Permanent magnetic chuck with nonmagnetic barrier channel for holding magnetic pack

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US201459A US3109967A (en) 1962-06-11 1962-06-11 Permanent magnetic chuck with nonmagnetic barrier channel for holding magnetic pack

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4398349A (en) * 1980-02-22 1983-08-16 Bailey Donald H Precision tools and precision tool sets, and methods of constructing and utilizing same
US5266914A (en) * 1992-06-15 1993-11-30 The Herman Schmidt Company Magnetic chuck assembly
EP1344602A1 (en) * 2002-03-15 2003-09-17 Renault Automation Comau Magnetic clamping device
US20070103917A1 (en) * 2005-11-09 2007-05-10 Kenly Precision Industrial Co., Ltd. Lighting fixture
CN102448699A (en) * 2009-03-30 2012-05-09 法国圣戈班玻璃厂 Method for moulding a plastic part with a metal insert held in place by magnetisation, moulding device and use of a magnet for securing said insert
US9613738B2 (en) 2014-01-30 2017-04-04 Ixtur Oy Magnet
US9761396B2 (en) 2014-01-30 2017-09-12 Ixtur Oy Magnet and actuator

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2269149A (en) * 1939-11-24 1942-01-06 Gen Electric Permanent magnet
US2947921A (en) * 1957-02-25 1960-08-02 Brown & Sharpe Mfg Fine grid permanent magnetic chuck

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2269149A (en) * 1939-11-24 1942-01-06 Gen Electric Permanent magnet
US2947921A (en) * 1957-02-25 1960-08-02 Brown & Sharpe Mfg Fine grid permanent magnetic chuck

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4398349A (en) * 1980-02-22 1983-08-16 Bailey Donald H Precision tools and precision tool sets, and methods of constructing and utilizing same
US5266914A (en) * 1992-06-15 1993-11-30 The Herman Schmidt Company Magnetic chuck assembly
EP1344602A1 (en) * 2002-03-15 2003-09-17 Renault Automation Comau Magnetic clamping device
FR2837119A1 (en) * 2002-03-15 2003-09-19 Renault Automation Comau MAGNETIC CLAMP DEVICE
US20070103917A1 (en) * 2005-11-09 2007-05-10 Kenly Precision Industrial Co., Ltd. Lighting fixture
CN102448699A (en) * 2009-03-30 2012-05-09 法国圣戈班玻璃厂 Method for moulding a plastic part with a metal insert held in place by magnetisation, moulding device and use of a magnet for securing said insert
CN102448699B (en) * 2009-03-30 2016-03-02 法国圣戈班玻璃厂 For the molded method with the plastic components by magnetizing the metal interpolation part kept, device for molding and the application of magnet in fixing described interpolation part
US9613738B2 (en) 2014-01-30 2017-04-04 Ixtur Oy Magnet
US9761362B2 (en) 2014-01-30 2017-09-12 Ixtur Oy Magnet and method for handling metal sheets
US9761396B2 (en) 2014-01-30 2017-09-12 Ixtur Oy Magnet and actuator

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