US2657342A - Magnetic plate structure - Google Patents
Magnetic plate structure Download PDFInfo
- Publication number
- US2657342A US2657342A US156328A US15632850A US2657342A US 2657342 A US2657342 A US 2657342A US 156328 A US156328 A US 156328A US 15632850 A US15632850 A US 15632850A US 2657342 A US2657342 A US 2657342A
- Authority
- US
- United States
- Prior art keywords
- magnetic
- plate
- casing
- magnets
- magnetic plate
- 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
Links
- 230000005291 magnetic effect Effects 0.000 title description 33
- 235000013305 food Nutrition 0.000 description 6
- 239000002245 particle Substances 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000010963 304 stainless steel Substances 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000003292 diminished effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 239000006249 magnetic particle Substances 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
- B03C1/02—Magnetic separation acting directly on the substance being separated
- B03C1/28—Magnetic plugs and dipsticks
- B03C1/288—Magnetic plugs and dipsticks disposed at the outer circumference of a recipient
Definitions
- Magnetic plates heretofore used in traps or conduits for foods, grain or the like included a plate mounted on a frame by belts or similar structures, which with the usual housings thereon, resulted in cracks, crevices and small cavities wherein food or the like substance was lodged and thus produced unsanitary conditions and diminished the effectiveness of the magnetic field.
- An object of my invention is to provide a magnetic plate and an integral magnet housing on the plate surrounding the magnets magnetizing said plate so as to form a continuous smooth integral unit without cracks, crevices or the like.
- Another object is to provide a magnetic plate unit, which is sanitary, without cracks or crevices, and which can be totally immersed in foods, as for instance on rotating paddles or paddle wheels or agitators, or immersed in tanks or vats or the like, without food particles lodging in the same.
- Fig. 1 is a perspective view of my magnetic plate unit the top casing being partly broken away to expose to view the packing of the magnets therein.
- Fig. 2 is a perspective bottom view of my magnetic plate unit viewing it from upon the collecting plate surface and Fig. 3 is a cross sectional view of my magnetic plate unit.
- a magnet On top of the plate I and straddlingthe nonmagnetic strip 3 is provided a magnet, in the present illustration formed out of a plurality of spaced permanent horseshoe magnets ii so arranged transversely with respect to said strips that the pole pieces I of each magnet 6 are in contact with and engage the respective mag netic strips 3 on the opposite sides of the magnetic strip 3.
- the magnets 6 are surrounded by a casing 3 which is suitably shaped and rounded and has tapered securing flanges 3 all around suitably flaring into the top surface II of the plate I so that the joining edges of said casing 3 present a continuous smooth surface blending into the top surface I i of the plate i.
- each magnet ii Between the magnets 6 and also at the outer side of each magnet ii are provided insulating spacers such as blocks of wood or rubber spacers to positively locate the magnets in the casing and to fill the spaces between the magnets and also between each magnet and the adjacent side of the casing.
- the top of the casing has on its inside surface a rubber cushion I3 which is pressed upon the magnets when the casing 53 is secured in place so as to exert pressure on top of the magnets 6 and hold them in constant firm contact with the respective top surfaces of the magnetic strips 2.
- the flange surfaces ll between the respective edges of the casing B and the outer edges of the plate I provide a supporting flange surface which may be suitably held on the bottom of a channel or conduit with the casing 3 outside the conduit, or which may otherwise suitably rest upon other supporting surfaces wherein this magnetic unit may be installed.
- the casing 8 may be made of a material of limited magnetic properties, namely of a poor conductor, which i capable of closing the magnetic field across the plates above the magnets and thereby increasing the magnetic effectiveness or efficiency of the unit.
- a slightly permeable stainless steel such as the so-called type 304 stainless steel was found suitable. This steel has about 2% manganese content. This type of steel can be case hardened.
- This casing acts like a keeper across the magnetic circuit. The object is to have a wide airgap for throwing the magnetic field comparatively high, yet retain as much residual magnetic induction as a narrower airgap would retain.
- a casing which for all practical effects and purposes is non-magnetic, but is conductive to a slight degree acts in the arrangement as herein described to retain a higher level of residual magnetic induction than the level normally retained with the given airgap.
- the unit herein described may be mounted in any channel, chute or conduit through which food products or the like pass, or the unit may be mounted on moving parts.
- magnetic particles are effectively collected upon the magnetic strips 2, but neither such particles nor any food particle or the like can be lodged anywhere except on smooth exposed surfaces of the unit, from where such particles can be easily swept off or cleaned.
- a magnetic plate unit including a pair of spaced magnetic strips, a non-magnetic strip integrally joined with said magnetic strips and filling the space therebetween at a continuous level and in the plane of said magnetic strips, said strip assembly forming a single uninterrupted plate having a smooth operating surface, permanent magnet means straddling said non-magnetic strip on the plate side opposite said operating surface, opposite poles of said permanent magnet means engaging the respective adjacent magnetic strips, a housing completely covering said permanent magnet means and being integrally united with the adjacent face of said plate, said References Cited in the file of this patent UNITED STATES PATENTS Numb er Name Date 2,179,625 Groden Nov. 14, 1939 2,187,240 Karasick Jan. 16, 1940 2,348,967 Duby May 16, 1944 2,517,174 Bradley Aug. 1, 1950 OTHER REFERENCES Indiana Permanent Magnet Manual No. 4, The Indiana Steel Products Co., Chicago, 111., p. 5.
Description
Oct. 27, 1953 o. E. STEM MAGNETIC PLATE STRUCTURE Filed April 17. 1950 INVENTOR. DONALD E. STEM ATTORNEY Patented Get. 27, 1953 UNITED ATENT OFFICE 2,657,342 MAGNETIC PLATE s'rRuc'rURE Donald E. Stem, san Francisco, Calif. Application April 17, 1950, Serial No; 156,328 1 Claim. (01. sir-159) This invention relates to a magnetic plate structure.
Magnetic plates heretofore used in traps or conduits for foods, grain or the like, included a plate mounted on a frame by belts or similar structures, which with the usual housings thereon, resulted in cracks, crevices and small cavities wherein food or the like substance was lodged and thus produced unsanitary conditions and diminished the effectiveness of the magnetic field.
An object of my invention is to provide a magnetic plate and an integral magnet housing on the plate surrounding the magnets magnetizing said plate so as to form a continuous smooth integral unit without cracks, crevices or the like.
Another object is to provide a magnetic plate unit, which is sanitary, without cracks or crevices, and which can be totally immersed in foods, as for instance on rotating paddles or paddle wheels or agitators, or immersed in tanks or vats or the like, without food particles lodging in the same.
I am aware that some changes may be made in the general arrangements and combinations of the several devices and parts, as well as in the details of the construction thereof without departing from the scope of the present invention as set forth in the following specification, and as defined in the following claim; hence I do not limit my invention to the exact arrangements and combinations of the said device and parts as described in the said specification, nor do I confine myself to the exact details of the construction of the said parts as illustrated in the accompanying drawings.
With the foregoing and other objects in view, which will be made manifest in the following detailed description, reference is had to the accompanying drawings for the illustrative embodiment of the invention, wherein:
Fig. 1 is a perspective view of my magnetic plate unit the top casing being partly broken away to expose to view the packing of the magnets therein.
Fig. 2 is a perspective bottom view of my magnetic plate unit viewing it from upon the collecting plate surface and Fig. 3 is a cross sectional view of my magnetic plate unit.
In carrying out my invention I make use of a plate I made of a pair of spaced strips 2 of magnetic material and a non-magnetic strip 3 in the space between the said magnetic strips 2 being welded together edge to edge into an integral unit and finished to form a single continuous surface 4.
On top of the plate I and straddlingthe nonmagnetic strip 3 is provided a magnet, in the present illustration formed out of a plurality of spaced permanent horseshoe magnets ii so arranged transversely with respect to said strips that the pole pieces I of each magnet 6 are in contact with and engage the respective mag netic strips 3 on the opposite sides of the magnetic strip 3. The magnets 6 are surrounded by a casing 3 which is suitably shaped and rounded and has tapered securing flanges 3 all around suitably flaring into the top surface II of the plate I so that the joining edges of said casing 3 present a continuous smooth surface blending into the top surface I i of the plate i.
Between the magnets 6 and also at the outer side of each magnet ii are provided insulating spacers such as blocks of wood or rubber spacers to positively locate the magnets in the casing and to fill the spaces between the magnets and also between each magnet and the adjacent side of the casing. The top of the casing has on its inside surface a rubber cushion I3 which is pressed upon the magnets when the casing 53 is secured in place so as to exert pressure on top of the magnets 6 and hold them in constant firm contact with the respective top surfaces of the magnetic strips 2. The flange surfaces ll between the respective edges of the casing B and the outer edges of the plate I provide a supporting flange surface which may be suitably held on the bottom of a channel or conduit with the casing 3 outside the conduit, or which may otherwise suitably rest upon other supporting surfaces wherein this magnetic unit may be installed.
The casing 8 may be made of a material of limited magnetic properties, namely of a poor conductor, which i capable of closing the magnetic field across the plates above the magnets and thereby increasing the magnetic effectiveness or efficiency of the unit. For instance a slightly permeable stainless steel, such as the so-called type 304 stainless steel was found suitable. This steel has about 2% manganese content. This type of steel can be case hardened. This casing acts like a keeper across the magnetic circuit. The object is to have a wide airgap for throwing the magnetic field comparatively high, yet retain as much residual magnetic induction as a narrower airgap would retain. A casing which for all practical effects and purposes is non-magnetic, but is conductive to a slight degree acts in the arrangement as herein described to retain a higher level of residual magnetic induction than the level normally retained with the given airgap.
The unit herein described may be mounted in any channel, chute or conduit through which food products or the like pass, or the unit may be mounted on moving parts. In each application magnetic particles are effectively collected upon the magnetic strips 2, but neither such particles nor any food particle or the like can be lodged anywhere except on smooth exposed surfaces of the unit, from where such particles can be easily swept off or cleaned.
I claim:
A magnetic plate unit including a pair of spaced magnetic strips, a non-magnetic strip integrally joined with said magnetic strips and filling the space therebetween at a continuous level and in the plane of said magnetic strips, said strip assembly forming a single uninterrupted plate having a smooth operating surface, permanent magnet means straddling said non-magnetic strip on the plate side opposite said operating surface, opposite poles of said permanent magnet means engaging the respective adjacent magnetic strips, a housing completely covering said permanent magnet means and being integrally united with the adjacent face of said plate, said References Cited in the file of this patent UNITED STATES PATENTS Numb er Name Date 2,179,625 Groden Nov. 14, 1939 2,187,240 Karasick Jan. 16, 1940 2,348,967 Duby May 16, 1944 2,517,174 Bradley Aug. 1, 1950 OTHER REFERENCES Indiana Permanent Magnet Manual No. 4, The Indiana Steel Products Co., Chicago, 111., p. 5.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US156328A US2657342A (en) | 1950-04-17 | 1950-04-17 | Magnetic plate structure |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US156328A US2657342A (en) | 1950-04-17 | 1950-04-17 | Magnetic plate structure |
Publications (1)
Publication Number | Publication Date |
---|---|
US2657342A true US2657342A (en) | 1953-10-27 |
Family
ID=22559108
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US156328A Expired - Lifetime US2657342A (en) | 1950-04-17 | 1950-04-17 | Magnetic plate structure |
Country Status (1)
Country | Link |
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US (1) | US2657342A (en) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2906553A (en) * | 1955-01-24 | 1959-09-29 | Wilson Harry Carl | Magnetic latch |
US2965235A (en) * | 1958-03-07 | 1960-12-20 | Daline Gordon | Perforated display panel with magnetic attachment means |
US2966992A (en) * | 1957-12-23 | 1961-01-03 | American Display Company | Magnetic holder |
US3226838A (en) * | 1962-10-18 | 1966-01-04 | Pasco Inc | Magnetic copy-setting device |
US3255532A (en) * | 1962-04-04 | 1966-06-14 | Motor Wheel Corp | Magnetic measuring apparatus |
US5296141A (en) * | 1993-01-28 | 1994-03-22 | Ellison Mearl E | Magnetic water conditioner |
US5314625A (en) * | 1992-12-29 | 1994-05-24 | Michael Farnelli | External oil pan magnet |
US20150196370A1 (en) * | 2014-01-10 | 2015-07-16 | Wong Technology LLC | Device for holding small dental parts |
US20180221890A1 (en) * | 2017-02-02 | 2018-08-09 | FilterMag International, Inc. | Modular magnetic oil filtering plug |
US11059051B2 (en) * | 2017-02-02 | 2021-07-13 | FilterMag International, Inc. | Magnetic filtering device |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2179625A (en) * | 1938-09-01 | 1939-11-14 | John J Groden | Work holder |
US2187240A (en) * | 1937-01-16 | 1940-01-16 | Karasick Samuel | Permanent magnet chuck and demagnetizer |
US2348967A (en) * | 1941-12-08 | 1944-05-16 | Clarence J Duby | Permanent lifting magnet |
US2517174A (en) * | 1948-03-13 | 1950-08-01 | Dings Magnetic Separator Co | Spout magnet assemblage |
-
1950
- 1950-04-17 US US156328A patent/US2657342A/en not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2187240A (en) * | 1937-01-16 | 1940-01-16 | Karasick Samuel | Permanent magnet chuck and demagnetizer |
US2179625A (en) * | 1938-09-01 | 1939-11-14 | John J Groden | Work holder |
US2348967A (en) * | 1941-12-08 | 1944-05-16 | Clarence J Duby | Permanent lifting magnet |
US2517174A (en) * | 1948-03-13 | 1950-08-01 | Dings Magnetic Separator Co | Spout magnet assemblage |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2906553A (en) * | 1955-01-24 | 1959-09-29 | Wilson Harry Carl | Magnetic latch |
US2966992A (en) * | 1957-12-23 | 1961-01-03 | American Display Company | Magnetic holder |
US2965235A (en) * | 1958-03-07 | 1960-12-20 | Daline Gordon | Perforated display panel with magnetic attachment means |
US3255532A (en) * | 1962-04-04 | 1966-06-14 | Motor Wheel Corp | Magnetic measuring apparatus |
US3226838A (en) * | 1962-10-18 | 1966-01-04 | Pasco Inc | Magnetic copy-setting device |
US5314625A (en) * | 1992-12-29 | 1994-05-24 | Michael Farnelli | External oil pan magnet |
US5296141A (en) * | 1993-01-28 | 1994-03-22 | Ellison Mearl E | Magnetic water conditioner |
US20150196370A1 (en) * | 2014-01-10 | 2015-07-16 | Wong Technology LLC | Device for holding small dental parts |
US9314315B2 (en) * | 2014-01-10 | 2016-04-19 | Wong Technology LLC | Device for holding small dental parts |
US20180221890A1 (en) * | 2017-02-02 | 2018-08-09 | FilterMag International, Inc. | Modular magnetic oil filtering plug |
US10654047B2 (en) * | 2017-02-02 | 2020-05-19 | FilterMag International, Inc. | Modular magnetic oil filtering plug |
US11059051B2 (en) * | 2017-02-02 | 2021-07-13 | FilterMag International, Inc. | Magnetic filtering device |
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