US3288511A - Two-part magnetic catch for doors or the like - Google Patents

Two-part magnetic catch for doors or the like Download PDF

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US3288511A
US3288511A US47345465A US3288511A US 3288511 A US3288511 A US 3288511A US 47345465 A US47345465 A US 47345465A US 3288511 A US3288511 A US 3288511A
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door
pole faces
catch
magnetic
magnetic catch
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John B Tavano
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John B Tavano
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    • EFIXED CONSTRUCTIONS
    • E05LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05CBOLTS OR FASTENING DEVICES FOR WINGS, SPECIALLY FOR DOORS OR WINDOWS
    • E05C19/00Other devices specially designed for securing wings, e.g. with suction cups
    • E05C19/16Devices holding the wing by magnetic or electromagnetic attraction
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T16/00Miscellaneous hardware [e.g., bushing, carpet fastener, caster, door closer, panel hanger, attachable or adjunct handle, hinge, window sash balance, etc.]
    • Y10T16/35Panel hangers, travelers and/or tracks
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T292/00Closure fasteners
    • Y10T292/11Magnetic

Description

Nov. 29, 1966 J. B. TAVANO 3 TWO-PART MAGNETIC CATCH FOR DOORS OR THE LIKE Filed July 20, 1965 F/G. M
I N VENTOR. JOHN B. TAVANO A TTOR/VEYS United States Patent 3,288,511 TWO-PART MAGNETIC CATCH FOR DOORS OR THE LIKE John I5. Tavano, 28 Edgewood Ave., Torrington, Conn. Filed July 20, 1965, Ser. No. 473,454 4 Claims. (Cl. 292251.5)
This invention relates to magnetic catches for doors or the like and deals more particularly with a magnetic catch having two separable magnetic parts, one of which is adapted to be mounted in a door which is to be releasably held closed, and the other of which is adapted to be mounted in a door frame.
A general object of the present invention is to provide a two-part magnetic catch of the foregoing character wherein the magnetic holding force gene-rated therebetween can be preset to any convenient value by relative rotational movement of at least one of said two parts with respect to the other such part.
Another general object of the present invention is to provide a two-part magnetic catch of the foregoing character wherein a conventional door opening means, such as a door knob, is connected to one of said parts and adapted to vary the magnetic holding force generated between said magnetic catch parts in response to conventional movement of said means, as for example rotation of the door knob.
The drawing shows a preferred embodiment of the invention and such embodiment will be described, but it will be understood that various changes may be made from the construction disclosed, and that the drawing and description are not to be construed as defining or limiting the scope of the invention, the claims forming a part of this specification being relied upon for that purpose.
Of the drawing:
FIG. 1 is a perspective view of a door and door frame in which a two-part magnetic catch of the present invention has been installed.
FIG. 2 is a vertical section through that part of the magnetic catch installed in the door frame of FIG. 1.
FIG. 3 is an elevational view of the magnetic catch part shown in FIG. 2 and is ta en along the line 33 of that figure.
FIG. 4 is a vertical section through that part of the magnetic catch installed in the door of FIG. 1.
Turning now to the drawing in greater detail, FIG. 1 shows a door frame including a door frame header 12 and two upright door jambs 14 and 16. A flush door 18 is hingedly connected to the left-hand door jamb 16 and is adapted to close the doorway opening defined by said door frame 10. Preferably and as shown the righthand door jamb 14 of the door frame 18 defines a door engageable stop portion indicated generally at 20 in which is mounted a magnetic catch part 22 best shown in FIG. 2. A door knob 24 is rotatably received in the door as shown and carries the second magnetic catch part 26 of the two-part catch as best shown :in FIG. 4. It is a feature of the present invention that the two-parts 22 and 26 are of generally annular configuration, as shown in FIG. 3, and are adapted to register axially with one another when the door 18 is in a closed position.
Turning now to a detailed description of the means for mounting said last-mentioned magnetic catch part 26 in the door 18, an annular disc member 28 will be seen from FIG. 4 to be connected to the door knob 24 by a shaft 30 which is rotatably received in the door 18, and in an escutcheon plate 32. The door knob 24 is attached to one end of said shaft 30 by a setscrew 34 and said shaft is connected at its other end to the disc member 28 by a nut 36 threadably received on a threaded end portion of said shaft as shown; As so constructed, rotational movement of the knob 24 is accompanied by relative rotational movement of the magnetic catch part 26 to be described.
In accordance with the present invention, each of the two magnetic catch parts 22 and 26 are generally similar in construction and each comprises an annular disc member for retaining a plurality of permanent magnets in equally spaced circumaxial relation as best shown in FIG. 3. The disc member 28 shown in FIG. 4 carries a first plurality of permanent magnets each of which has a rearwardly facing exposed pole face of particular polarity in the general pattern shown in FIG. 3. As shown, eight such pole faces are provided and each of these has a polarity opposite that of the two immediately adjacent pole faces in this circumaxial pattern. Preferably, and as shown in FIG. 4, the magnet retaining member 28 and its associated permanent magnets, indicated generally at 38, 38, are recessed in the rear side of the door 18 in a cavity defined therein for this purpose and a nonmagnetic cup-shaped member is set in this cavity as shown. The cup-shaped member 40 has an opening to receive the shaft 30 and will be seen to provide a convenient receptacle for the door mounted magnetic catch part 26.
In further accord with the present invention, the magnetic catch part 22 which is mounted in the door jamb 14 includes a second disc retaining member 42 for carrying a second plurality of permanent magnets having exposed pole faces circumaxially arranged therearound in equally spaced relationship as shown in FIG. '3. These magnets are identical to those described hereinabove with reference to the door mounted catch part 26. The mag netic catch part 22 is adjustably mounted in a cavity defined in the door stop portion 20 of the door jamb 14 and a second nonmagnetic cup-shaped member 44 is provided in said cavity to receive the disc member 42 and its associated magnets 38, 38. A wood screw 46 is received in an opening in the member 42 and extends through a coaxially arranged opening in the cup-shaped housing member 44. The inner end of said screw 46 is threadably received in the door jamb 14 so as to lock the magnetic catch part 22 in any desired angular relation with respect to the first mentioned magnetic catch part 26 described hereina-bove.
While the door knob 24, and its associated magnetic catch part 26 are shown as rotatably supported in the door 18, it will be apparent that many of the advantages to the present invention can be realized by nonrotatably mounting the part 26 in the door. For example, the other magnetic catch part 22 might be adjustably prepositioned to hear an angular relation with the fixed door mounted part 26 which would exert only enough closing force therebetween to hold the door shut against forces below a certain threshold value, as for example the force due to a wind of particular intensity.
In the preferred embodiment shown however, the door mounted catch part 26 is rotatably supported for movement in response to a movable door opening means such as the knobs 24, and part 22 may also be rotatably adjusted to the desired operative position. As so constructed and arranged the magnetic catch part 26 can be selectively positioned in either a door closed position wherein the pole faces of the catch parts 22 and 26 are attached to one another, or a door open position wherein these pole faces are repelled from one another.
The invention claimed is:
1. A magnetic catch for a door which is adapted for movement into and out of a door frame for closing the doorway defined therein, said catch comprising a first magnet retaining member, means for mounting said first member on said door, a first plurality of permanent magnets carried by said first member and having a series of exposed pole faces circumaxially arranged around said first member, each such pole face having a polarity opposite that of the two pole faces adjacent thereto in said first member, a second magnet retaining member generally similar to said first member, means for mounting said second member in said door frame so that the respective axes of said annular members are in registered relation when said door is closed in said doorway, a second plurality of permanent magnets carried by said second member and having a series of exposed pole faces circumaxially arranged around said second member, each of said last-mentioned pole faces having a polarity opposite that of the two pole faces adjacent thereto in said second member, and said means for mounting at least one of said magnet retaining members including suitable adjustment means for prepositioning that member in any desired angular relation with respect to the other of said members whereby the magnetic closing force exerted on said closed door can be preset to any desired value.
2. A magnetic catch for a door as set forth in claim 1 and further characterized by door opening means accessible from at least one side of said door and connected to said first magnet retaining member for relative rotational movement of the latter with respect to the door whereby the magnetic door closing force can be replaced by an oppositely directed force tending to open said door.
3. A magnetic catch for a door which is adapted for movement into and out of a door frame for closing the doorway opening defined therein, said catch comprising a first magnet retaining disc, means for rotatably mounting said first disc on said door, a first pluraility of permanent magnets carried by said first disc and having a series of exposed pole faces circumaxially arranged around said first disc in equally spaced relationship, each such pole face having a polarity opposite that of the two pole faces immediately adjacent thereto, a second magnet retaining disc generally similar to said first disc, means for mounting said second disc in said door frame so that the respective axes of said discs are in registered relation when said door is closed in said doorway, a second plurality of permanent magnets carried by said second disc and having a series of exposed pole faces circumaxially arranged around said second disc and corresponding in number and spacing to the pole faces in said first annular member, each of said second series of pole faces having a polarity opposite that of both pole faces adjacent thereto on said second disc, and door opening means accessible from at least one side of said door and connected to said first magnet retaining disc for rotating the same and selectively positioning the pole faces of said second series in position for attracting those of said first series whereby the door can be magnetically held in its closed position and for repelling said lastmentioned series whereby the door is urged out of said closed position upon manual movement of said door opening means, said pluralities of magnets being rotatably,
- adjustably mounted relative to one another to provide a desired holding force therebetween.
4. A magnetic catch for a door which is adapted for movement into and out of a door frame for closing the doorway defined therein, said catch comprising a first annular magnet retaining disc member adapted to be received in a cavity defined in the door adjacent to marginal edge portion thereof, a first plurality of permanent magents carried by said disc member in said cavity and having a series of rearwardly exposed pie-shaped pole faces circumaxially arranged around said disc member in equally spaced relationship, each such pole face having a polarity opposite that of the two pole faces immediately adjacent thereto on said disc member, a door opening means accessible from a front side of said door and including a stub shaft rotatably supported in said door with a rear end extending into said door defined cavity, said first disc member being afiixed to said rear shaft end for rotational movement in response to rotational movement of said shaft, a second annuar magnet retaining disc member adapted to be received in a second cavity defined in said door frame, a second plurality of permanent magnets carried by said disc member and having a series of forwardly exposed pie-shaped pole faces circumaxially arranged around said said second disc member in equally spaced relationship, each of said last-mentioned pole faces having a polarity opposite that of the two pole faces adjacent thereto on said second disc member, and mounting means for securing said second series of forwardly facing pole faces in said door frame defined cavity in a particular angular relation with respect to said first series of rearwardly facing pole faces whereby the said faces can be selectively registered with one another to hold said door in a closed position in said door frame.
References Cited by the Examiner UNITED STATES PATENTS 2,275,839 3/ 1942 Boehne 317-159 2,288,688 7/1942 Dubilier 292-251.5 X 2,468,969 5/1949 Galey 292-144 2,471,067 5 /1949 Hitchcock 317-159 2,797,655 7/ 1957 Morehouse 292-251.5 X 2,983,538 5/1961 Fletcher 292251.5 3,034,025 5/1962 Budreck et al 317-159 3,079,535 2/ 1963 Schultz 317-201 FOREIGN PATENTS 1,179,194 12/1958 France. 1,201,673 7/1959 France.
375,409 4/ 1964 Switzerland.
EDWARD C. ALLEN, Primary Examiner.
R. E. MOORE, Assistant Examiner.

Claims (1)

1. A MAGNETIC CATCH FOR A DOOR WHICH IA ADAPTED FOR MOVEMENT INTO AND OUT OF A DOOR FRAME FOR CLOSING THE DOORWAY DEFINED THEREIN, SAID CATCH COMPRISING A FIRST MAGNET RETAINING MEMBER, MEANS FOR MOUNTING SAID FIRST MEMBER ON THE DOOR, A FIRST PLURALITY OF PERMANENT MAGNETS CARRIED BY SAID FIRST MEMBER AND HAVING A SERIES OF EXPOSED POLE FACES CIRCUMAXIALLY ARRANGED AROUND SAID FIRST MEMBER, EACH SUCH POLE FACE HAVING A POLARITY OPPOSITE THAT OF THE TWO POLE FACES ADJACENT THERETO IN SAID FIRST MEMBER, A SECOND MAGNET RETAINING MEMBER GENERALLY SIMILAR TO SAID FIRST MEMBER, MEANS FOR MOUNTING SAID SECOND MEMBER IN SAID DOOR FRAME SO THAT THE RESPECTIVE AXES OF SAID ANNULAR MEMBERS ARE IN REGISTERED RELATION WHEN SAID DOOR IS CLOSED IN SAID DOORWAY, A SECOND PLURALTIY OF PERMANENT MAGNETS CARRIES BY SAID SECOND MEMBER AND HAVING A SERIES OF EXPOSED POLE FACES CIRCUMAXIALLY ARRANGED AROUND SAID SECOND MEMBER, EACH OF SAID LAST-MENTIONED POLE FACES HAVING A POLARITY OPPOSITE THAT OF THE TWO POLE FACES ADJACENT THERETO IN SAID SECOND MEMBER, AND SAID MEANS FOR MOUNTING AT LEAST ONE OF SAID MAGNET RETAINING MEMBERS INCLUDING SUITABLE ADJUSTMENT MEANS FOR PREPOSITIONING THAT MEMBER IN ANY DESIRED ANGULAR RELATION WITH RESPECT TO THE OTHER OF SAID MEMBERS WHEREBY THE MAGNETIC CLOSING FORCE EXERTED ON SAID CLOSED DOOR CAN BE PRESET TO ANY DESIRED VALUE.
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