US3426166A - Magnetic closure and switch for doors and similar devices - Google Patents

Magnetic closure and switch for doors and similar devices Download PDF

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Publication number
US3426166A
US3426166A US3426166DA US3426166A US 3426166 A US3426166 A US 3426166A US 3426166D A US3426166D A US 3426166DA US 3426166 A US3426166 A US 3426166A
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Prior art keywords
magnet
magnetic
relay
doors
switch
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Expired - Lifetime
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Bernard Jean-Jacques Canceill
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International Standard Electric Corp (ISEC)
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International Standard Electric Corp (ISEC)
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    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H36/00Switches actuated by change of magnetic field or of electric field, e.g. by change of relative position of magnet and switch, by shielding
    • H01H36/0006Permanent magnet actuating reed switches
    • H01H36/0046Limit switches, also fail-safe operation or anti-tamper considerations
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H36/00Switches actuated by change of magnetic field or of electric field, e.g. by change of relative position of magnet and switch, by shielding
    • H01H36/008Change of magnetic field wherein the magnet and switch are fixed, e.g. by shielding or relative movements of armature
    • 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

96 B. JEAN- JACQUES CANCEILL 3,426,166

MAGNETIC CLOSURE AND SWITCH FOR DOORS AND SIMILAR DEVICES Filed June 9, 19 66 Inventor BEE/V4190 JEAN JACQUES CA/VC'E/LL A ttom ey United States Patent 3,426,166 MAGNETIC CLOSURE AND SWITCH FOR DOORS AND SIMILAR DEVICES Bernard J ean-Jacques Canceill, Paris, France, assignor to International Standard Electric Corporation, New York, N.Y., a corporation of Delaware Filed June 9, 1966, Ser. No. 556,483 US. Cl. 20061.62 Int. Cl. H01j 36/00 1 Claim ABSTRACT OF THE DISCLOSURE This invention concerns contact devices used to close an electrical circuit when a door or any other item of equipment is opened. It concerns, for example, illumination of a bulb to light the interior of a piece of furniture, or a car, etc., when the door is opened. Former practice was to use a spring-equipped contact button, which is a device wherein a faulty contact may take place due to oxidation of the contact point, weakening of the spring, etc. The purpose of the invention is to offer a contact device, the operation of which is much more reliable.

In accordance with the invention, a relay with magnetic reeds sealed in a tube is mounted on the magnetic mount of a magnet designed for closing a door, in such a manner as to be switched on when, the door being opened, the magnetic circuit of the magnet is opened, and to .open when, the door being closed, the magnetic circuit is closed through the armature mounted on the door.

In accordance with one of the features of the invention, preferably, a current model relay used, particularly, in telephone switching and a current model closing magnet, particularly for household furniture are provided. The discovery has been made, in accordance with the invention, that this model of relay is well adaptable to this model of magnet both where dimensions and where magnetic force are concerned. In accordance with a feature of the invention, the assembly can be completed by a magnetic shunt so as to prevent the relay from remaining closed by the flux loss when the armature is in contact position with the magnet.

Numerous methods of controlling a magnetic reed relay through the movement of a magnet and numerous uses for this control method are known. However, in these known devices the relay was closed by approaching the magnet. In the device covered by the invention, the relay and the magnet form a fixed assembly and the relay is controlled through movement of the armature. In other words, in devices known up to now, the relay was closed by approaching a part whereas, in the case of the device covered by the invention, the relay is closed by separating a part. Furthermore, the device covered by the invention, completely retains its properties as a Patented Feb. 4, 1969 "ice magnetically closing device, such as, for example, in the case of furniture doors. The relay functions with a flux loss which is lost without being of any use in the closing operation.

The reliable operation of the device covered by the invention makes it possible to apply it to various safety circuits: elevator door control, control of doors and windows of private or business premises, control of indicator lights in hotels, shops, etc. The low price of its essential components; the relay and the closing magnet, makes it possible to use it in all cases, and in any quantity.

The invention will be described in greater detail with reference to practical examples shown on the attached drawing, in which:

FIG. 1 shows the longitudinal section of a first embodiment;

FIG. 2 is a plane view of this alternative; and

FIGS. 3 and 4 also, show a second embodiment.

The device shown on FIG. 1 includes a magnetic closure, part of which consists of the U-shaped magnet 1 embedded in a moulded mount 2, whereas the other part consists of a plate 3 mounted free in a moulded mount 4. The magnet is retained, generally, on a door frame section 12 and the plate on a door 11. Mount 2 is equipped with an insert 5, in which a magnetic reed relay 6 is fitted. When the door is not closed, so that plate 3 is separated from magnet 1, the rear flux loss of the latter induces attraction between the magnetic reeds of the relay, and thus closes the contact in the circuit of wires 7 coupled to an electrical apparatus 8. This apparatus can be a lighting bulb, a remote indicator light, an alarm device, etc. It can be supplied from a battery, a conventional wall outlet, or other suitable source. When the door is closed, the magnet circuit is closed by plate 3 contacting legs 13 and 14 of magnet 1 protrudin from mount 2 and the flux loss is greatly weakened. In practice, this flux loss may still be of sufficient value for retaining the relay reeds blocked; hence, in order to assure opening of the contact there is provided a magnetic shunt 9 between the magnet and the relay.

In the alternative arrangement in FIG. 3, mount 2 is a model usually used in magnetic closing devices. Relay 6 is held by a clip 10 which is tightened between the mount 2 and the door frame. For example, this clip is provided with holes as is mount 2, for the passage of ordinary retention screws. It is well understood that other alternatives are possible within the limits of the invention.

What is claimed is:

1. A magnetic closure and switch comprising: first and second members, said first member being movable to and from said second member; a permanent magnet mounted on one of said members and having an exposed portion, said permanent magnet being U-shaped, the legs of said U-shaped permanent magnet providing said exposed portion thereof; a magnet keeper element mounted on the other of said members and having an exposed face positioned to contact said exposed portion of said permanent magnet when said members are moved into close proximity to each other, said keeper element being attracted by said magnet when said members are in close proximity to complete a magnetic circuit therethrough that results in a force sufficient to hold said members together, said keeper element being in the form of a plate which contacts the legs of said magnet when the magnetic circuit is closed, said plate being positioned 3 4 outside of said U-shaped area when said magnetic cir- 3,012,116 12/1961 Boylan et a1. 335205 cuit is not closed; a normally open switch formed of a 3,161,742 12/1964 Bagno 20061.62 X magnetic reed relay mounted on one of said members 3,164,696 1/1965 Pusch 335-205 X within the magnetic field of said magnet but remote from 3,187,127 6/ 1965 Hess 335-205 X said exposed portion thereof, said magnetic reed relay 5 2,909,384 10/1959 Saxton 335-285 arranged to close by flux leakage from said magnet when 3,022,398 2/ 1962 Abel 335-153 said keeper element is positioned such that said magnetic circuit is open, said flux leakage being insufiicient to BERNARD GILHEANY, Primary Examiner.

close said relay when said magnetic circuit is closed. HAROLD BROOME, Assistant Examiner References Cited 10 Us C1 XR' UNITED STATES PATENTS 335205 2,924,682 2/1960 Winterburn 335-274

US3426166A 1966-06-09 1966-06-09 Magnetic closure and switch for doors and similar devices Expired - Lifetime US3426166A (en)

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Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3590397A (en) * 1969-06-20 1971-07-06 Omron Tateisi Electronics Co Automatic flushing device for toilet facilities
US3618067A (en) * 1969-11-04 1971-11-02 Donald P Devale Movement detector
US3627959A (en) * 1970-03-19 1971-12-14 Sage Laboratories Magnetic latching and switching
US3890476A (en) * 1974-08-08 1975-06-17 Gen Motors Corp Appliance cabinet with actuated door switch
US4114194A (en) * 1976-04-22 1978-09-12 Clairol, Inc. Ultrasonic cleaner
FR2402496A1 (en) * 1977-09-09 1979-04-06 Bristol Myers Co Ultrasonic cleaning unit for domestic use - has tank in outer case and switch operated by magnetic field when protective cover is closed
US4241337A (en) * 1979-03-29 1980-12-23 General Electric Company Appliance door position sensor arrangement
US4274070A (en) * 1979-08-14 1981-06-16 Surgical Mechanical Research Corp. Proximity instant-on switch for medical and dental instruments
US4287512A (en) * 1980-03-31 1981-09-01 Dynametric, Inc. Magnetic locking methods and apparatus
US4296957A (en) * 1979-09-24 1981-10-27 Lok-A-Wat, Inc. Chain-lock actuated magnetic switch
US4306744A (en) * 1979-12-03 1981-12-22 Krehbiel V Dwight Door retainer and alarm device
US4310188A (en) * 1979-11-02 1982-01-12 Yoshihiro Aoki Magnetic switch for attractive latch
US4536754A (en) * 1983-05-13 1985-08-20 Sentrol, Inc. Magnetically retained connecting cable incorporating magnetically operated switch
US4570156A (en) * 1984-03-16 1986-02-11 Systematics General Corp. Self-contained secured work station
US4703962A (en) * 1985-02-12 1987-11-03 Reliable Security Systems, Inc. Magnetic door lock with time delay option
US4788517A (en) * 1987-10-08 1988-11-29 Beta Mfg. Co. Sealed proximity switch assembly
US4814750A (en) * 1987-11-20 1989-03-21 Pace Window & Door Corp. Window screen alarm
US5007199A (en) * 1990-02-15 1991-04-16 Larmco Security, Inc. Anti-intrusion window
US5063372A (en) * 1990-06-22 1991-11-05 Ranco Incorporated Of Delaware Door ajar alarm for refrigeration unit
US5070319A (en) * 1990-06-22 1991-12-03 Ranco Incorporated Of Delaware Door ajar alarm for refrigeration unit
US5406263A (en) * 1992-07-27 1995-04-11 Micron Communications, Inc. Anti-theft method for detecting the unauthorized opening of containers and baggage
US5602526A (en) * 1994-11-21 1997-02-11 Read; Robert M. Vehicle open door warning system
US5831531A (en) * 1992-07-27 1998-11-03 Micron Communications, Inc. Anti-theft method for detecting the unauthorized opening of containers and baggage
US20050236408A1 (en) * 2004-04-08 2005-10-27 Maytag Corporation Door position sensing system for cooking appliance including combination heating system
US20060292291A1 (en) * 2005-06-27 2006-12-28 White John M System and methods for inkjet printing for flat panel displays
US20070279163A1 (en) * 2006-06-01 2007-12-06 Elesta Relays Gmbh Monitorable securing means
US20080094158A1 (en) * 2006-10-23 2008-04-24 Elesta Relays Gmbh Locking device
US20080094239A1 (en) * 2006-10-19 2008-04-24 Commissariat A L'energie Atomique Device for detecting the relative position of two elements with improved integration

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2909384A (en) * 1954-04-30 1959-10-20 Engineered Products Company Magnetic door catch
US2924682A (en) * 1957-06-03 1960-02-09 George A Winterburn Magnetically actuated switches
US3012116A (en) * 1960-11-01 1961-12-05 Arthur P Boylan Switch
US3022398A (en) * 1959-05-15 1962-02-20 Fluidwick Company Inc Electric control device
US3161742A (en) * 1961-08-24 1964-12-15 Specialties Dev Corp Magnetic intruder and fire deterctor
US3164696A (en) * 1961-08-04 1965-01-05 Gen Electric Vane operated magnetic reed switch
US3187127A (en) * 1962-01-09 1965-06-01 Westinghouse Air Brake Co Magnetic reed proximity switch

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2909384A (en) * 1954-04-30 1959-10-20 Engineered Products Company Magnetic door catch
US2924682A (en) * 1957-06-03 1960-02-09 George A Winterburn Magnetically actuated switches
US3022398A (en) * 1959-05-15 1962-02-20 Fluidwick Company Inc Electric control device
US3012116A (en) * 1960-11-01 1961-12-05 Arthur P Boylan Switch
US3164696A (en) * 1961-08-04 1965-01-05 Gen Electric Vane operated magnetic reed switch
US3161742A (en) * 1961-08-24 1964-12-15 Specialties Dev Corp Magnetic intruder and fire deterctor
US3187127A (en) * 1962-01-09 1965-06-01 Westinghouse Air Brake Co Magnetic reed proximity switch

Cited By (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3590397A (en) * 1969-06-20 1971-07-06 Omron Tateisi Electronics Co Automatic flushing device for toilet facilities
US3618067A (en) * 1969-11-04 1971-11-02 Donald P Devale Movement detector
US3627959A (en) * 1970-03-19 1971-12-14 Sage Laboratories Magnetic latching and switching
US3890476A (en) * 1974-08-08 1975-06-17 Gen Motors Corp Appliance cabinet with actuated door switch
US4114194A (en) * 1976-04-22 1978-09-12 Clairol, Inc. Ultrasonic cleaner
FR2402496A1 (en) * 1977-09-09 1979-04-06 Bristol Myers Co Ultrasonic cleaning unit for domestic use - has tank in outer case and switch operated by magnetic field when protective cover is closed
US4241337A (en) * 1979-03-29 1980-12-23 General Electric Company Appliance door position sensor arrangement
US4274070A (en) * 1979-08-14 1981-06-16 Surgical Mechanical Research Corp. Proximity instant-on switch for medical and dental instruments
US4296957A (en) * 1979-09-24 1981-10-27 Lok-A-Wat, Inc. Chain-lock actuated magnetic switch
US4310188A (en) * 1979-11-02 1982-01-12 Yoshihiro Aoki Magnetic switch for attractive latch
US4306744A (en) * 1979-12-03 1981-12-22 Krehbiel V Dwight Door retainer and alarm device
US4287512A (en) * 1980-03-31 1981-09-01 Dynametric, Inc. Magnetic locking methods and apparatus
US4536754A (en) * 1983-05-13 1985-08-20 Sentrol, Inc. Magnetically retained connecting cable incorporating magnetically operated switch
US4570156A (en) * 1984-03-16 1986-02-11 Systematics General Corp. Self-contained secured work station
US4703962A (en) * 1985-02-12 1987-11-03 Reliable Security Systems, Inc. Magnetic door lock with time delay option
US4788517A (en) * 1987-10-08 1988-11-29 Beta Mfg. Co. Sealed proximity switch assembly
US4814750A (en) * 1987-11-20 1989-03-21 Pace Window & Door Corp. Window screen alarm
US5007199A (en) * 1990-02-15 1991-04-16 Larmco Security, Inc. Anti-intrusion window
US5164705A (en) * 1990-02-15 1992-11-17 Larmco Security, Inc. Anti-intrusion window
US5063372A (en) * 1990-06-22 1991-11-05 Ranco Incorporated Of Delaware Door ajar alarm for refrigeration unit
US5070319A (en) * 1990-06-22 1991-12-03 Ranco Incorporated Of Delaware Door ajar alarm for refrigeration unit
US5406263A (en) * 1992-07-27 1995-04-11 Micron Communications, Inc. Anti-theft method for detecting the unauthorized opening of containers and baggage
USRE42777E1 (en) 1992-07-27 2011-10-04 Round Rock Research, Llc Anti-theft method for detecting the unauthorized opening of containers and baggage
US5646592A (en) * 1992-07-27 1997-07-08 Micron Communications, Inc. Anti-theft method for detecting the unauthorized opening of containers and baggage
US5831531A (en) * 1992-07-27 1998-11-03 Micron Communications, Inc. Anti-theft method for detecting the unauthorized opening of containers and baggage
USRE43415E1 (en) 1992-07-27 2012-05-29 Round Rock Research, Llc Anti-theft method for detecting the unauthorized opening of containers and baggage
US5602526A (en) * 1994-11-21 1997-02-11 Read; Robert M. Vehicle open door warning system
US20050236408A1 (en) * 2004-04-08 2005-10-27 Maytag Corporation Door position sensing system for cooking appliance including combination heating system
US20060292291A1 (en) * 2005-06-27 2006-12-28 White John M System and methods for inkjet printing for flat panel displays
US20070279163A1 (en) * 2006-06-01 2007-12-06 Elesta Relays Gmbh Monitorable securing means
US20080094239A1 (en) * 2006-10-19 2008-04-24 Commissariat A L'energie Atomique Device for detecting the relative position of two elements with improved integration
US7916019B2 (en) * 2006-10-19 2011-03-29 Commissariat A L'energie Atomique, Etablissement Public A Caractere Industriel Et Commercial Device for detecting the relative position of two elements via electric circuit section having mechanical function in at least one of the elements
US20080094158A1 (en) * 2006-10-23 2008-04-24 Elesta Relays Gmbh Locking device

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