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US3443043A - Push-button snap action switch utilizing a permanent magnet means,particularly for communication equipment - Google Patents

Push-button snap action switch utilizing a permanent magnet means,particularly for communication equipment Download PDF

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Publication number
US3443043A
US3443043A US663751A US3443043DA US3443043A US 3443043 A US3443043 A US 3443043A US 663751 A US663751 A US 663751A US 3443043D A US3443043D A US 3443043DA US 3443043 A US3443043 A US 3443043A
Authority
US
United States
Prior art keywords
push
key
permanent magnet
housing
communication equipment
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
Application number
US663751A
Other languages
English (en)
Inventor
Karl Schmid-Zeller
Heinz Thormann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Siemens Corp
Original Assignee
Siemens Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Siemens Corp filed Critical Siemens Corp
Application granted granted Critical
Publication of US3443043A publication Critical patent/US3443043A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H36/00—Switches actuated by change of magnetic field or of electric field, e.g. by change of relative position of magnet and switch, by shielding
    • H01H36/0006—Permanent magnet actuating reed switches
    • H01H36/004—Permanent magnet actuating reed switches push-button-operated, e.g. for keyboards
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H15/00—Switches having rectilinearly-movable operating part or parts adapted for actuation in opposite directions, e.g. slide switch
    • H01H15/02—Details

Definitions

  • a push button switch particularly for communication equipment, having an actuating key structure, an annular body disposed in coaxial relation with respect to the key structure, said body being positioned in a magnetizable housing structure, and movable therein responsive to key movement, with some play therebetween or equally movable therewith, the annular body being constructed as a permanent magnet or having permanent magnet means to provide a magnetic flux, as a result of which the body is retained, in the nonactuated position, engagement with the housing by magnetic adhesion, and axially movable responsive to movement of said key in actuating direction, operative to initially oppose such key movement as a result of such magnetic adhesion, and upon the release thereof, to effect a quick break movement and contact actuation in response to the magnetic flux concentration in the area of its final actuated position.
  • the invention relates to key switches particularly suitable as push-button switches for communication equipment.
  • a simple push-button switch with a snap-action characteristic which, in particular, is suitable for the operation of protective gas contact arrangements.
  • annular body which is disposed in coaxial relation with respect to the actuating key structure, an annular body which is positioned in a magnetizable housing structure, and movable therein responsive to key movement, with some play therebetween or equally movable therewith, the annular body being constructed as a permanent magnet or having permanent magnet means to provide a magnetic flux, as a result of which the body is retained, in the nonactuated position, in engagement with the housing by magnetic adhesion, and axially movable responsive to movement of said key in actuating direction, operative to initially oppose such key movement as a result of such magnetic adhesion, and upon the release thereof, to efl'ect a quick break movement and contact actuation in response to the magnetic flux concentration in the area of its final actuated position.
  • such annular body is constructed as a radially magnetized permanent magnet toroidal core.
  • the annular body in the form of a radially magnetized permanent magnet toroidal core, in the rest position of the key is urged by a compression spring surrounding the pin into engagement with a shoulder on the housing, enclosing the nonmagnetic neck of the pushbutton, while upon actuation of the key, following the initial movement, the switch is closed by the actuating force derived from magnetic attraction between the permanent magnet core and an oppositely disposed stop for the ring located relatively closer to the pin than the shoulder and constituting a part of the key structure or of the housing, as a result of magnetic flux concentration in the movable contact piece.
  • FIG. 1 is a cross section of a push-button switch according to the invention, illustrated in rest position;
  • FIG. 2 is a cross section of the switch according to FIG. 1, illustrated in operating position
  • FIG. 3 is a top plan view of the permanent magnet utilized.
  • a push-button switch for communication purposes, and if desired also for the control of electric typewriters and the like, comprises a key body 2 disposed in a housing 1 of magnetic material, the key body in turn comprising a flange-like actuating button 2a, having a nonmagnetic cylindrical neck portion 2b which extends into a flanged opening or boss 1a of the housing, a still thinner stern portion 20, and a cylindrical flange member 2d connected thereto, whose outer diameter approaches the inner diameter of the principal portion 1b of the housing.
  • the key structure 2 and the housing substantially completely enclose an annularly-shaped permanent magnetic body 3 which, as illustrated in FIG. 3, is radially magnetized.
  • the housing member 1b which is open at the bottom is supported preferably without open joints, on a likewise magnetizable, substantially cylindrical, sealed protective gas container 4, through the top wall 4a, of which extends a magnetizable pin 5 insulated by means of a glass seal 7, which forms a fixed contact member of a protective gas contact arrangement.
  • a flexible spring member 6 which is both electrically and magnetically conductive, serves as a cooperable contact member, which is conductively connected to the container 4.
  • Pin 5 is suitably electrically connected to a connection member (not illustrated) which is insulated from the housing or the container, as the case may be.
  • a compression spring 8 disposed between key part 2d and a nonmagnetic annularly-shaped filler block 9 dis-posed on the top wall 4a of the protective gas container normally maintains the key body in the rest position, illustrated in FIG. 1, in which position the magnetic body 3 is attracted and adheres to surface 10 of housing 1, with only a small secondary magnetic flux running over pin 5 and container 4.
  • the magnetic adhesion force creates additional resistance to such key movement.
  • the shoulder thereof pushes down on magnet 3 breaking the adhesion with surface 10, moving it toward the flux guiding pin 5.
  • a push-button switch particularly for communication equipment, comprising a housing structure which is at least partially ferromagnetic, an actuating key structure, an annular body disposed in coaxial relation with respect to said actuating key structure, said annular body being positioned in said housing structure and movable therein responsive to key movement relative to the latter, the annular body being constructed to provide a magnetic flux as a result of which the body, in its nonactuated position, is retained in engagement with the housing by magnetic adhesion, and axially movable responsive to movement of said key in actuating direction, said annular member being operative to initially oppose such key movement as a result of such magnetic adhesion, and magnetically actuatable contact means cooperable with said body, the latter being operable upon release of said magnetic adhesion responsive to key actuation to effect a snap-action type of movement and effect contact actuation in response to the magnetic flux concentration in the areal of its actuated position.
  • a push-button switch according to claim 1, wherein said annular body and key structure are so constructed that an amount of play exists therebetween.
  • said magnetically actuatable contact means comprises a .4 contact member in the form of a rigidly disposed ferromagnetic pin coaxially positioned with respect to said key structure, mounted in electrically insulated relation in a member forming a part of the housing structure, a cooperiable moveable contact member electrically and magnetically connected to the housing, said housing having a shoulder engageable with said body when in nonactuated position, a compression spring surrounding said pin and operative to urge said key structure in nonactuated position and the body into engagement with said shoulder, said pin and body being cooperable in actuated position to effeet a magnetic flux concentration in the area of said movable contact member to eliect actuation thereof.
  • a push-button switch according to claim 4 wherein said key structure is provided with means provided at the inner end thereof forming a stop for said annular body which defines the actuated position of the body.
  • a push-button switch according to claim 4, wherein said annular body and key structure are so constructed that an amount of play exists therebetween, said play being such that the key structure upon being actuated effects an initial movement before engaging the permanent magnet body.

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  • Push-Button Switches (AREA)
US663751A 1966-09-02 1967-08-28 Push-button snap action switch utilizing a permanent magnet means,particularly for communication equipment Expired - Lifetime US3443043A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES0105666 1966-09-02

Publications (1)

Publication Number Publication Date
US3443043A true US3443043A (en) 1969-05-06

Family

ID=7526774

Family Applications (1)

Application Number Title Priority Date Filing Date
US663751A Expired - Lifetime US3443043A (en) 1966-09-02 1967-08-28 Push-button snap action switch utilizing a permanent magnet means,particularly for communication equipment

Country Status (7)

Country Link
US (1) US3443043A (de)
CH (1) CH477077A (de)
DE (1) DE1665733B1 (de)
DK (1) DK121769B (de)
GB (1) GB1162550A (de)
NL (1) NL151547B (de)
SE (1) SE315632B (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3542967A (en) * 1965-07-01 1970-11-24 Int Standard Electric Corp Control of path connections in a telephone switching system
US3879602A (en) * 1973-06-11 1975-04-22 N Dimensions Keyboard
US4354081A (en) * 1978-11-29 1982-10-12 Serras Paulet Edouard Push-button or keyboard with depressable keys
EP1905644A1 (de) * 2006-09-26 2008-04-02 NEC TOKIN Corporation Bremsleuchtenschalter für ein Kraftfahrzeug
US20090091408A1 (en) * 2007-10-03 2009-04-09 Kabushiki Kaisha Tokai Rika Denki Seisakusho And Nec Tokin Corporation Switch Device
US20100007402A1 (en) * 2008-07-10 2010-01-14 Przemyslaw Chamuczynski Weatherproof switch for indoor and outdoor information clusters and function switches
USD930354S1 (en) * 2019-12-20 2021-09-14 Magswitch Technology Worldwide Pty Ltd. Magnetic keychain

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3017010C2 (de) * 1980-05-02 1984-04-26 Hans Widmaier Fabrik für Apparate der Fernmelde- und Feinwerktechnik, 8000 München Tastenwahlblock, insbesondere für die Fernsprechtechnik
HU194440B (en) * 1983-11-30 1988-01-28 Szamitastech Koord Push-button structure with non-linear characteristic curve of displacement-pressure
US4726588A (en) * 1986-08-18 1988-02-23 Balls-N-Bars, Inc. Magnetic detent device and puzzle game device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2637115A (en) * 1950-04-03 1953-05-05 Christensen Machine Co Magnetic calipering device
US3175060A (en) * 1961-08-22 1965-03-23 North Electric Co Plunger operated magnetic electric switch
US3273091A (en) * 1965-08-19 1966-09-13 Metrodynamics Corp Hermetically-sealed manually-actuated magnetic snap switch
US3292123A (en) * 1965-05-13 1966-12-13 Marbelite Company Inc Permanent magnet operable reed switch
US3373386A (en) * 1965-02-02 1968-03-12 Ehrenberg Hermann Adjustable pushbutton magnet switch

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1190088B (de) * 1957-11-26 1965-04-01 Continental Elektro Ind Ag Sprungschaltwerk fuer einen elektrischen Endschalter
DE1883074U (de) * 1963-09-18 1963-11-21 Telefonbau & Normalzeit Gmbh Schaltvorrichtung mit schutzrohrkontakten.

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2637115A (en) * 1950-04-03 1953-05-05 Christensen Machine Co Magnetic calipering device
US3175060A (en) * 1961-08-22 1965-03-23 North Electric Co Plunger operated magnetic electric switch
US3373386A (en) * 1965-02-02 1968-03-12 Ehrenberg Hermann Adjustable pushbutton magnet switch
US3292123A (en) * 1965-05-13 1966-12-13 Marbelite Company Inc Permanent magnet operable reed switch
US3273091A (en) * 1965-08-19 1966-09-13 Metrodynamics Corp Hermetically-sealed manually-actuated magnetic snap switch

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3542967A (en) * 1965-07-01 1970-11-24 Int Standard Electric Corp Control of path connections in a telephone switching system
US3879602A (en) * 1973-06-11 1975-04-22 N Dimensions Keyboard
US4354081A (en) * 1978-11-29 1982-10-12 Serras Paulet Edouard Push-button or keyboard with depressable keys
EP1905644A1 (de) * 2006-09-26 2008-04-02 NEC TOKIN Corporation Bremsleuchtenschalter für ein Kraftfahrzeug
US20080258853A1 (en) * 2006-09-26 2008-10-23 Kabushiki Kaisha Tokai Rika Denki Seisakusho And Nec Tokin Corporation Automotive stop lamp switch
US20090091408A1 (en) * 2007-10-03 2009-04-09 Kabushiki Kaisha Tokai Rika Denki Seisakusho And Nec Tokin Corporation Switch Device
US7932796B2 (en) * 2007-10-03 2011-04-26 Kabushiki Kaisha Tokai Rika Denki Seisakusho Switch device
US20100007402A1 (en) * 2008-07-10 2010-01-14 Przemyslaw Chamuczynski Weatherproof switch for indoor and outdoor information clusters and function switches
US8279029B2 (en) * 2008-07-10 2012-10-02 Flextronics Automotive, Inc. Weatherproof switch for indoor and outdoor information clusters and function switches
USD930354S1 (en) * 2019-12-20 2021-09-14 Magswitch Technology Worldwide Pty Ltd. Magnetic keychain

Also Published As

Publication number Publication date
NL151547B (nl) 1976-11-15
NL6711552A (de) 1968-03-04
DK121769B (da) 1971-11-29
SE315632B (de) 1969-10-06
CH477077A (de) 1969-08-15
GB1162550A (en) 1969-08-27
DE1665733B1 (de) 1970-07-09

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