GB1589309A - Magnetic attraction device - Google Patents
Magnetic attraction device Download PDFInfo
- Publication number
- GB1589309A GB1589309A GB3749777A GB3749777A GB1589309A GB 1589309 A GB1589309 A GB 1589309A GB 3749777 A GB3749777 A GB 3749777A GB 3749777 A GB3749777 A GB 3749777A GB 1589309 A GB1589309 A GB 1589309A
- Authority
- GB
- United Kingdom
- Prior art keywords
- magnetic
- sheet
- mounting base
- magnetic sheet
- attached
- 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
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]
- H01F7/0205—Magnetic circuits with PM in general
- H01F7/021—Construction of PM
- H01F7/0215—Flexible forms, sheets
Description
(54) A MAGNETIC ATTRACTION DEVICE
(71) I, SEUI ABE, of 8-10-305, Fukuzumi 2-chome Koto-ku, Tokyo, Japan, a Japanese citizen, do hereby declare the invention for which I pray that a patent may be granted to me, and the method by which it is to be performed, to be particularly described in and by the following statement:
This invention relates to a magnetic attraction device.
A sheet of permanently magnetised material measuring 6 cm by 6 cm and having a thickness of 0.25 cm can usually attract and hold a piece of metal or a metal base weighing at most, 125 grams by the attraction. A thin sheet of such material is used in many fields such as a colour sheet for a teaching material, various utensils and diverse apparatus, because it is flexible. The magnetic attraction is, however, not powerful enough to attract and hold a heavy piece of metal, for the sheet is too thin. Therefore applications of such sheets are limited by their character especially in the field where it is desired to use sheets of permanently magnetised material for attracting and holding heavy materials such as industrial installations.
According to the present invention there is provided a magnetic attraction device comprising a mounting base and a sheet of permanently magnetised material attached at the central portion thereof to one side of said mounting base for retaining said mounting base by magnetic attraction to a surface of magnetisable material, the peripheral portion of said magnetic sheet around said central portion being flexible and free relative to said mounting base so that, in use, as the mounting base is drawn away from said surface of magnetisable material said peripheral portion tends to remain in contact therewith.
In a device defined above the magnetic attraction of a sheet of permanently magnetised material may be considerably strengthened.
The invention will now be described in more detail, by way of example only, with reference to the accompanying drawings in which:
Figure 1 is a cross sectional view of one embodiment of a magnetic device in accordance with the invention;
Figures 2 & 3 are cross sectional views of other embodiments of magnetic devices in accordance with the invention;
Figures 4 (a) & 4 (b) are cross sectional views illustrating a practical application of a magnetic device in accordance with the invention;
Figures 5, 6, 7 (a) & 7 (b) are cross sections showing other embodiments of the invention;
Figures 8, 9 & 10 are perspective views of an embodiment of the invention applied to an accordion-type curtain;
Figures 11-13 illustrate a slidable hanger using an embodiment of the invention;
Figures 14-23 illustratively show other embodiments of the invention applied to interior decorations;;
Figures 24-28 illustrate other embodiments of the invention applied to doors of a wardrobe; and
Figure 29 is a perspective view of an embodiment of the invention applied to a bag.
Throughout the specification, unless otherwise stated, the term "magnetic sheet" refers to a sheet of permanently magnetised material.
In Figs. 1-7 a magnetic sheet is generally referenced 1. The central part of the magnetic sheet is referenced la and the end parts of the magnetic sheet are referenced lb. A doubledfaced-adhesive tape is generally referenced 2. A mounting base is indicated at 3 and a piece of metal or a metal base 4 is attracted by the magnetic sheet 1. An iron fragment or an iron sheet is shown at 5 in Figure 3.
In Figure 1, a magnetic sheet 1 having a central part la is attached to a mounting base 3 by means of a double-sided adhesive tape 2, although any adhesive or mounting device may be used. The peripheral portion or free end parts ib of the magnetic sheet 1 are not attached to the base 3 by the adhesive 2 and are in a flexible and free state relative to the mounting base 3. In an alternative arrangement, as shown in Fig. 2, a thick magnet may be used intead of an ordinary mounting base 3. The thick magnet 3 used as a mounting base 3 has the same effect or better effect mentioned as follows. Another alternative to a mounting base 3 is an iron sheet 5 which alternative arrangement is shown in Fig. 3.
When a magnetisable metal plate 4 is brought up against the magnetic sheet 1, in the above mentioned construction of said invention, the end parts 1b of the magnetic sheet 1, being in flexible and free state from the mounting base 3, are first attracted to the plate 4. They are then followed by the central part la. While the magnetic sheet 1 is being attracted to the plate 4, the air between the magnetic sheet 1 and the plate 4 will be expelled so that the part between them will be in a vacuum state. The magnetic sheet 1 is, therefore, held firmly against the plate 4 by the relatively high air pressure, in addition to the magnetic attraction between them. When the magnetic sheet 1 is pulled away from the plate 4, the central part of said magnetic sheet 1 is lifted slightly away from the plate 4 as shown in Fig. 4a of the drawings.The end parts lb, however, continue to be attached to the metal plate 4 because the magnetic attraction of the magnetic sheet 1 concentrates in the end parts 1b of the magnetic sheet 1. Then the magnetic attraction at the end parts 1b will be strengthened and the sheet 1 will behave like a horseshoe magnet. The parts lb will not let air into the space between said magnetic sheet 1 and the metal plate 4, and the air pressure on the outer side of the magnetic sheet 1 presses the sheet 1 against the metal plate 4. The magnetic sheet 1 is therefore held quite firmly against the metal plate 4.In this embodiment, a magnetic sheet measuring 6 cm by 7 cm and having a thickness of 0.25 mm will attract and retain a heavy load weight 5 k grams, whereas, a magnetic sheet, which has the same dimensions as those above mentioned, without the end parts being flexible and free can only attract and retain a load weighing 125 grams.
As described above, this invention makes use of the flexibility and the magnetic force of a magnetic sheet. The magnetic attraction of a magnetic sheet is strengthened so much that even a heavy load on the magnetic sheet can be held fast against the magnetic attraction. Applications for the magnetic sheet are, therefore, enlarged.
Other embodiments of this invention are shown in Figs. 5-7 of said drawings, where the above mentioned means adhering the magnetic sheets and mounting bases are shown as alternatives. In Fig. 5 of the drawings, a thick magnetic sheet 1 has two projections lc, between the central part la and the end parts lb which are received by two hooks 3a provided on the mounting base 3. The thick magnetic sheet 1 is attached fast to the metal plate 3 by means of the projections lc and hooks 3a instead of an adhesive tape. In Figs. 6a and 6b the mounting base 3 has the thick part 3b and a recessed part, and a double-faced adhesive tape 2 or similar adhesive is placed in the recessed part of said mounting base 3. The central part la of a magnetic sheet is attached to the mounting base 3 by the adhesive 2 as shown in Fig. 6b.If the central part la of the magnetic sheet is thick enough to fit tightly into the recessed part of the mounting base 3 as shown in Fig. 6a, the magnetic sheet will be more firmly attached to the mounting base 3. In Fig.s 7 (a) & 7 (b) of the drawings, the central part la of a magnetic sheet, projecting towards a mounting base 3, is held fast in the recessed part of the mounting base 3, and the end parts 1b are left in a flexible and free state like those of other embodiments.
The embodiment shown in Fig. 5 of the drawings can be applied widely to applications such as an accordion type curtain because adhesive is not used in order to mount a magnetic sheet on a mounting base 3, however, such magnetic sheet 1 is mounted fast on the mounting base 3. The embodiment shown in Fig. 6 (a) of the drawings can be also applied widely because the central part la of the magnetic sheet is thick, which will endure chemical change by the adhesive, while it is mounted fast on said mounting base 3. The embodiments shown in Figs. 7 (a) & 7 (b) of the drawings are suitable for use as fasteners which are used in pairs. And a plurality of magnetic sheets of this invention as shown in Fig. 8 of said drawings will enlarge its applications to many fields.
The following are examples of applications of the described magnetic sheets:
Figs. 8-10 of the drawings illustrate an example of an accordion type curtain to which the magnetic sheet of this invention is applied.
With a conventional accordion type curtain, a plastics case 7 is received by a corresponding recess in a curtain frame 6 to provide a magnetic catch to hold the curtain in the closed position. A magnet 9, the magnetic attraction of which is concentrated with catcher yokes 8, is inserted thereinside in the plastics case 7. The embodiment of this invention is simple and economical as above mentioned. (The central part of a magnetic sheet 1 is attached fast to a plastic mounting base 7a fastened to a frame of an accordion curtain). By not employing metal such as catcher yokes 8, the magnetic sheet 1 of this invention will not clink noisily and will not make scratch marks on a surface of the attracted metal or metal base when it is attracted into engaged relationship. Besides, when a coated steel pole or a frame is used, catcher yokes damage the coating. The said magnetic sheet may be attractively coloured and shaped.
The frame of an accordion type curtain may also be thinner because the magnetic sheet is then functional.
Figs. 11-13 of the drawings illustrate a slidable hanger embodying a magnetic sheet in accordance with the invention.
The central part of a magnetic sheet 1 is fastened to a mounting base 3 having a hanger hook 12. The magnetic force or attraction of such magnetic sheet 1 attracts an ordinary magnetic sheet 11 attached to the inner side surface of the upper side of a wardrobe 10. The magnetic attraction between them holds a hanger holder having the mounting base 3 and the hanger hook 12. The hanger holder is easy to slide on the surface of the ordinary magnetic sheet 11, whereas it is strong enough to attract and hold against a heavy load on the hanger holder. This application of this invention, therefore, has a merit in terms of use, because the magnetic sheet 1 of said hanger holder is easily attached anywhere on the surface of an ordinary magnetic sheet 11 of the wardrobe 10.
It is easily attached to and taken from the surface of the ordinary magnetic sheet 11 of the wardrobe 10, since it need only to be put on the surface when it is desired to be and it has only to be slid to a non-metal part of the wardrobe 10 or an end part of said magnetic sheet 1 of this invention in order to disengage when to be removed.
Figs 14-18 of the drawings illustrate other embodiments of this invention applied to the building field, for example in interior decoration.
The central parts of the magnetic sheets 1 of this invention adhere to a decoration sheet 12 as illustrated in Figs. 17 & 18. A steel base 14 mounted on a wall 13 is attracted by the magnetic sheet 1. The decoration sheet 12 having the magnetic sheet 1 of this invention is easily engaged with and disengaged from said steel base 14 mounted on the wall 13, because it has only to be rolled off; in order to engage, from the lower side to the upper side as illustrated in Fig.14 it has only to be pulled down in order to disengage, from the lower side as illustrated in
Fig. 15 because it is easily slid. As illustrated in Figs. 14 and 16 of the drawings, the steel bases 14 the thicknesses of which are approximately 0.1 mm, are partially mounted on the wall and the decoration sheet 12 having the magnetic sheets 1 of said invention attract and hold the sheet 12.Further, the means 2 attaching the magnetic sheet 1 fastened to the steel base 14 may be any form of means such as a double faced adhesive tape or adhesive as mentioned above. Another alternative is to attach the central part of the magnetic sheet 1 to the wall 13 and mount the steel base 14 on the decoration sheet 12.
When the decoration sheet is a hard board such as a decoration panel 16, the decoration panel 16 is attached as illustrated in Figs. 1923 of the drawings. Several panels 16 having magnetic sheets 1 of said invention attached to steel bases 14 mounted on a wall 13 are put side by side as illustrated in Figs. 19 & 20. A panel having a convexity on one side hereof and a concavity on the other side hereof as illustrated in Fig. 20 is an alternative to this.
With these decoration panels 16, it is suitable to have a set composed of a steel mounting base 14 having a double-face adhesive tape 2 (Fig. 21), a mounting base having a magnetic sheet 1 of this invention and a double-face adhesive tape (Fig. 22), and a decoration panel 16a (Fig. 23).
Figs. 24-28 illustrate an embodiment applied to a clasp of a wardrobe. Conventionally, a magnetic clasp having a magnet 17 mounted in an iron yoke in order to concentrate the magnetic attraction of the magnet 17, is inserted and fastened in a plastic case 19 screwed to a wardrobe. This is illustrated in
Figs. 24 (a) & 24 (b). This conventional magnetic clasp has the same interior points as the magnetic clasp of a pair of fasteners applied to said accordion curtain mentioned above. A unit of a magnetic sheet clasp, comprising a magnetic sheet 1 having flexible ends lb may be applied to the door 20 of a wardrobe, as is shown in Figs. 26-27, the magnetic sheet 1 fastening with a metal mounting base 14, on the upper side 21 of the wardrobe in Fig 26 or on another side as shown in Fig. 27.Alternatively, the base 14 may be on the door and the sheet 1 on a side of the wardrobe, as shown in
Fig. 28. The magnetic device may simply be screwed to the wardrobe, as shown in Fig. 25.
Fig. 29 illustrates an embodiment applied to bags, suit cases and so on. Said magnetic sheet 1 of this invention is used here as a pair of fasteners of a bag 22. Magnetic attraction and air pressure by vacuum are utilized here to. A magnetic sheet of the type described, the dimension of which is 6 cmx 6 cmx 0.5 cm can attract and hold a heavy load weighing approximately 4-5 kilo grams, whereas a known magnetic sheet of the same dimensions can only hold a light load weighing at most 100-130 grams. Said magnetic sheet 1 may easily be slid by a horizontal source of 150200 grams, whereas a conventional attraction device which relies on suction is impossible to slide. Besides it has to be pressed when it is attached in order to engage and said magnetic sheet 1 of this invention is easy to engage because of the magnetic attraction.The magnetic sheet is flexible as mentioned above, therefore a steel base which will be attracted by the sheet 1 is not required to be flat, and since the magnetic sheet 1 has a magnetic attraction as mentioned above, unlike an attraction device relying on suction, it tends to adhere to a steel mounting base indefinitely.
WHAT I CLAIM IS:
1. A magnetic attraction device comprising a mounting base, and a sheet of permanently magnetised material attached at the central portion thereof to one side of said mounting base for retaining said mounting base by magnetic attraction to a surface of magnetisable material, the peripheral portion of said magnetic sheet around said central portion being flexible and free relative to said mounting base so that, in use, as the mounting base is drawn away from said surface of magnetisable material said peripheral portion tends to remain in contact therewith.
2. A device as claimed in claim 1 wherein said sheet is attached to said mounting base by means of a double-sided adhesive tape.
3. A device as claimed in claim 1, wherein said central portion is attached to an iron sheet placed between said magnetic sheet and said mounting base.
4. A device as claimed in claim 1 wherein
**WARNING** end of DESC field may overlap start of CLMS **.
Claims (12)
1. A magnetic attraction device comprising a mounting base, and a sheet of permanently magnetised material attached at the central portion thereof to one side of said mounting base for retaining said mounting base by magnetic attraction to a surface of magnetisable material, the peripheral portion of said magnetic sheet around said central portion being flexible and free relative to said mounting base so that, in use, as the mounting base is drawn away from said surface of magnetisable material said peripheral portion tends to remain in contact therewith.
2. A device as claimed in claim 1 wherein said sheet is attached to said mounting base by means of a double-sided adhesive tape.
3. A device as claimed in claim 1, wherein said central portion is attached to an iron sheet placed between said magnetic sheet and said mounting base.
4. A device as claimed in claim 1 wherein
said mounting base is itself in the form of a thick permanent magnet.
5. A device as claimed in claim 1, wherein said central part is fastened to said mounting base by means located between said central part and said peripheral portion, and which fit in said mounting base and hold it.
6. A device as claimed in claim 5 wherein said means which fit in said mounting base are in the form of projecting hooks which engage corresponding grooves formed in recesses in said mounting base.
7. A device as claimed in any one of claims 1 to 6 in combination with a similar device, said devices attracting each other to provide a fastener, and the mounting base of each sheet being provided with a recess which retains the central portion ofthe respective magnetic sheet.
8. A magnetic device as claimed in any one of claims 1 to 6 wherein a hanger hook is attached to said mounting base on the side remote from said sheet.
9. A magnetic device as claimed in any one of claims 1 to 6, wherein the central portion of said magnetic sheet is attached to an interior decoration sheet which provides said mounting base, said magnetic sheet attracting a magnetisable metal plate mounted on a wall.
10. A magnetic device as claimed in any one of claims 1 to 6, wherein the central portion of said magnetic sheet is firmly attached to a wall which provides said mounting base, said magnetic sheet attracting a magnetisable metal plate mounted on an interior decoration sheet.
11. A magnetic device as claimed in any one of claims 1 to 6 wherein said magnetic sheet is mounted on one part of an enclosure or the like, an attracted metal or a metal base being mounted on another part of said enclosure whereby said magnetic device acts as a magnetic catch.
12. A magnetic attraction device substantially as herein described with reference to Figs.
1-4(b), 5-7(b), 8-10, 11-13, 14-23,25-28 and 29 of the accompanying drawings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3749777A GB1589309A (en) | 1977-09-08 | 1977-09-08 | Magnetic attraction device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3749777A GB1589309A (en) | 1977-09-08 | 1977-09-08 | Magnetic attraction device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1589309A true GB1589309A (en) | 1981-05-13 |
Family
ID=10396916
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3749777A Expired GB1589309A (en) | 1977-09-08 | 1977-09-08 | Magnetic attraction device |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1589309A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2138489A (en) * | 1983-04-13 | 1984-10-24 | John Oliver Pierson | Seat-belt holder |
| GB2188490A (en) * | 1986-03-27 | 1987-09-30 | Porter Dual Controls Ltd | Magnetic mounting |
| GB2189649A (en) * | 1986-04-17 | 1987-10-28 | Porter Dual Controls Ltd | Magnetically attachable structure |
| GB2191089A (en) * | 1986-05-29 | 1987-12-09 | Sano Building Company Limited | Device for hanging articles |
| GB2213861A (en) * | 1987-12-15 | 1989-08-23 | Exotech Ltd | Magnetically secured adhesive fastener, and method |
| GB2232190A (en) * | 1989-05-23 | 1990-12-05 | Blakeacre Limited | Fastener for securing with adhesive to a body |
| GB2324567A (en) * | 1997-04-24 | 1998-10-28 | Patrick Joseph Laverty | Flexible magnetic disc with carrying rack |
| GB2351833A (en) * | 1999-07-07 | 2001-01-10 | Chown Peter A C | Magnetic retaining apparatus. |
| GB2366832A (en) * | 2000-09-13 | 2002-03-20 | Metal Merlin Ltd | Magnetic fastener |
-
1977
- 1977-09-08 GB GB3749777A patent/GB1589309A/en not_active Expired
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2138489A (en) * | 1983-04-13 | 1984-10-24 | John Oliver Pierson | Seat-belt holder |
| GB2188490B (en) * | 1986-03-27 | 1990-08-29 | Porter Dual Controls Ltd | Magnetic mounting means |
| GB2188490A (en) * | 1986-03-27 | 1987-09-30 | Porter Dual Controls Ltd | Magnetic mounting |
| GB2189649A (en) * | 1986-04-17 | 1987-10-28 | Porter Dual Controls Ltd | Magnetically attachable structure |
| GB2189649B (en) * | 1986-04-17 | 1989-04-12 | Porter Dual Controls Ltd | Magnetically attachable structure |
| GB2191089A (en) * | 1986-05-29 | 1987-12-09 | Sano Building Company Limited | Device for hanging articles |
| GB2213861A (en) * | 1987-12-15 | 1989-08-23 | Exotech Ltd | Magnetically secured adhesive fastener, and method |
| GB2213861B (en) * | 1987-12-15 | 1992-06-10 | Exotech Ltd | Magnetically secured adhesive fastener |
| GB2232190A (en) * | 1989-05-23 | 1990-12-05 | Blakeacre Limited | Fastener for securing with adhesive to a body |
| GB2232190B (en) * | 1989-05-23 | 1993-04-14 | Blakeacre Limited | Fastener for securing with adhesive to a body |
| GB2324567A (en) * | 1997-04-24 | 1998-10-28 | Patrick Joseph Laverty | Flexible magnetic disc with carrying rack |
| GB2324567B (en) * | 1997-04-24 | 2001-05-23 | Patrick Joseph Laverty | Equipment carrier |
| GB2351833A (en) * | 1999-07-07 | 2001-01-10 | Chown Peter A C | Magnetic retaining apparatus. |
| GB2366832A (en) * | 2000-09-13 | 2002-03-20 | Metal Merlin Ltd | Magnetic fastener |
| GB2366832B (en) * | 2000-09-13 | 2004-06-23 | Metal Merlin Ltd | Magnetic fasteners |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |