US3526863A - Electromagnetic holding mechanism - Google Patents

Electromagnetic holding mechanism Download PDF

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Publication number
US3526863A
US3526863A US678921A US3526863DA US3526863A US 3526863 A US3526863 A US 3526863A US 678921 A US678921 A US 678921A US 3526863D A US3526863D A US 3526863DA US 3526863 A US3526863 A US 3526863A
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United States
Prior art keywords
housing
magnetic
coil
movable
holding mechanism
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Expired - Lifetime
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US678921A
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English (en)
Inventor
Thomas H Vogelsang
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General Electric Co
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General Electric Co
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    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K13/00—Conveying record carriers from one station to another, e.g. from stack to punching mechanism
    • G06K13/02—Conveying record carriers from one station to another, e.g. from stack to punching mechanism the record carrier having longitudinal dimension comparable with transverse dimension, e.g. punched card
    • G06K13/08—Feeding or discharging cards
    • G06K13/0806—Feeding or discharging cards using an arrangement for ejection of an inserted card
    • G06K13/0825—Feeding or discharging cards using an arrangement for ejection of an inserted card the ejection arrangement being of the push-push kind
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/02—Details
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/02—Details
    • H01H13/023—Light-emitting indicators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/50—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a single operating member
    • H01H13/56—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a single operating member the contact returning to its original state upon the next application of operating force
    • H01H13/60—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a single operating member the contact returning to its original state upon the next application of operating force with contact-driving member moved alternately in opposite directions
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
    • H01H3/50—Driving mechanisms, i.e. for transmitting driving force to the contacts with indexing or locating means, e.g. indexing by ball and spring
    • H01H3/503—Driving mechanisms, i.e. for transmitting driving force to the contacts with indexing or locating means, e.g. indexing by ball and spring making use of electromagnets
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/16—Indicators for switching condition, e.g. "on" or "off"
    • H01H9/161—Indicators for switching condition, e.g. "on" or "off" comprising light emitting elements
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
    • H02B1/015—Boards, panels, desks; Parts thereof or accessories therefor
    • H02B1/04—Mounting thereon of switches or of other devices in general, the switch or device having, or being without, casing
    • H02B1/044—Mounting through openings
    • H02B1/048—Snap mounting

Definitions

  • a magnetic plunger is received within the bore of the coil and operatively engages the actuating device at one end and is provided with an extension at the other end for operatively engaging the switching device. Actuation of the actuating device actuates the magnetic plunger, the switching device, and also closes a pair of switch contacts through which the coil is energized to maintain the magnetic plunger and the switching device in their actuated positions irrespective of the position of the actuating device.
  • This invention relates to electromagnetically actuated switches and more particularly to the housing and magnetic structure of such switches.
  • the assignee of this application manufactures and sells separate actuating devices and switching devices, each of which is manufactured and sold in many Varieties. v'The housings of these switching and actuating devices are readily joined to each other to form push button actuated switches having various combinations of normally open and normally closed contacts and either momentary or alternate action. It has now been found desirable to provide an electromagnetic mechanism for use with the switching and actuating devices which will electromagnetically maintain the switching devices in the actuated position after they have been atcuated -by the actuating devices, irrespective of the subsequent position of the actu ating device, until the electromagnetic mechanism is deenergized.
  • the combined magnetic and manual switches provided in the past have been characterized by .a complex unitary structure, wherein exibility of operation and contact arrangement was not easily provided, and wherein tthe structure was quite diicult to assemble.
  • a coil and a magnetic assembly which includes a ixed magnetic portion and a movable magnetic portion, are assembled within a housing.
  • the xed magnetic portion surrounds the coil and the movable magnetic portion is in the form of a magnetic cylinder received in the bore of the coil to provide a magnetic path encircling the coil.
  • the xed magnetic portion is secured between two identical insulating housing halves which are secured at one end to the switch housing and at the opposite end to the actuator housing to form a composite housing.
  • the movable magnetic portion is provided with a shaft extension at one end which is seprate form and which engages an operating member in the switching device. Ther other end of the magnetic cylinder is separate from and engages an actuator in the actuating device so as to transmit actuating movement of the actuator in the actuating device to the operating member in the switching device.
  • the housing halves of the holding mechanism support iixed contacts which are engageable with movable contacts carried by the actuator to form a control switch through which the coil is energized.
  • Energization of the coil is effective to maintain the movable magnetic portion in its actuated position, thereby maintaining the operating member in its actuated position irrespective of the removal of the actuating force from the actuator.
  • the movable magnetic portion and the operating member are only released from their actuated positions by subsequent deenergization of the coil by means independent of the control switch contacts.
  • FIG. 2 is an exploded view of the electromagnetic holding mechanism of the assembly shown in FIG. l;
  • FIG. 3 is an enlarged side view of the composite assembly shown in FIG. 1, with some portions removed and other portions broken away, with the actuating device, switching device, and the electromagnetic holding mechanism in their unactuated positions;
  • FIG. 4 is a side view of portions of the electromagnetic holding mechanism and of the switching device shown in FIG. 3, in their actuated positions;
  • FIG. 5 is a sectional View taken substantially along line 5-5 in FIG. 4;
  • FIG. f6 is a circuit diagram for the electromagnetic holding mechanism.
  • the push button actuating device includes a housing assembly 10 and an illuminable push button
  • the housing assembly is adapted to be secured in a rectangular aperture in a panel (not shown) by the engagement of a flange 26 provided around the open end of the housing 14 and arms 28 of a pair of spring members or retaining clips 30 (not one shown in FIG. 1) with opposite sides of the panel (not shown).
  • the retaining clips 30 are secured to the side walls 16 of the housing by mushrooming projections 32 formed integrally with the side walls 16 of the housing over holes provided in the retaining clips 30.
  • the push button assembly 12 includes a hollow generally rectangular insulating member 34 which is formed with an open end over which is secured a light transmitting lens cap 36.
  • the lens cap 36 is illuminated by electric lamps (not shown) mounted within the insulating member 34.
  • An inner end or base 38 of the insulating member 34 engages a push rod 40 which passes through an aperture 41 formed in the base 22 of the housing 14.
  • the insulating member 34 together 'with the push rod 40 forms an actuator to operate a device attached at the base 22 of the housing assembly 10 when an actuating force is applied to the lens cap 36.
  • the rectangular insulating member 34 is biased outwardly by a coil spring 42, but is held within the receptacle 14 by a retaining device (not shown).
  • the novel and improved holding mechanism 44 which will be hereinafter further described, is formed with a housing 46 which is secured at one end to the housing 14 of the actuator housing assembly 10, and at the opposite end to a housing 48 of a switching device 50.
  • the switching device 50 may be secured directly to the push button housing 14 in those applications where the holding mechanism 44 may be omitted.
  • the first and second types of attaching means are adapted to be attached to each other.
  • the housing -48 of the switching device 50 is comprised of two identical insulating housing members 52 and is substantially open at the top 54 and is substantially closed at the bottom 56.
  • the bottom 56 supports terminals 58 which are connected to contacts (not shown) in the switching device and also a plate ⁇ 60 which supports one end of a coil spring ⁇ 62, the other end of which engages an operating member ⁇ 64 which is movable between actuated and unactuated positions to actuate movable contacts (not shown) in the switching device so as to open and close the contacts of the switching device.
  • the switch device 50 may be secured directly to the push button actuating device housing assembly 10. In such a case the lower end ⁇ 66 of the push rod 40 would then engage upper edge 68 of operating member 64.
  • the operating member 64 must be modified to eliminate a pair of upwardly extending arms 69 which are provided to support movable contacts within the holding mechanism housing 46. When so assembled, both the operating member 64 and the push rod 40 are biased upwardly by the spring 62 to their unactuated positions.
  • an improved unitary holding mechanism for electromagnetically holding the operating member -64 of the switch device 50 in its actuated position.
  • the holding mechanism 44 comprises a housing 46 which fixedly supports therein a coil and a rst fixed portion of a magnetic assembly.
  • the housing 46 also supports a second movable portion of the magnetic assembly which is positioned to transmit motion of push button assembly 12 to the operating member ⁇ 64 in the switching device 50.
  • the holding mechanism includes means effective when the movable portion of the magnetic assembly is moved to its actuated position to energize the coil to electromagnetically retain the movable portion in its actuated position so long as the coil is energized, the movable portion in turn holding the operating member ⁇ 64 of the switching device 50 in its actuated position.
  • the holding mechanism 44 includes a coil 70 which is wound on an insulating bobbin 72.
  • An insulating material such as insulating tape covers the periphery of the coil and along with the bobbin substantially encloses the coil within an insulating means.
  • the xed portion of the magnetic assembly is formed of three magnetic members comprising a cylindrical tubular magnetic member 74 surrounding the periphery of the coil 70 and two flat disk shaped magnetic members 76 and 78 inclosing the ends of the coil.
  • Disk shaped magnetic member 76 is provided with a cylindrical projection 80 of the same diameter as the cylindrical bore of the coil bobbin 72 to be received therein.
  • the projection 80 extends only a portion of the way within the bore in the bobbin. Notches 82 are provided in the periphery of the member 76 for receiving leads 84 and 86 of the coil. Disk shaped magnetic member 78 is formed 'with an aperture 8K8 therein which is of the same diameter as the bore in the bobbin 72.
  • the movable portion of the magnetic assembly is formed as a part of a plunger assembly 90 having a first magnetic portion 92 of a larger diameter corresponding to that of the bore in the bobbin 72, and a second non-magnetic portion 94 of a smaller diameter.
  • the housing ⁇ 46 is formed of two identical housing halves 96 and 98 each provided with tabs 100 for supporting disk shaped magnetic member 76, and with surfaces 102 spaced from and facing tabs 100 for engaging disk shaped magnetic member 78.
  • the arrangement is such that upon assembling the housing halves 96 and 98 the xed portion of the magnetic assembly and therefore the coil 70 and bobbin 72 are detachably secured within the housing 46.
  • projections 104 are provided on the housing halves which extend into the notches 82 formed in the disk shaped magnetic member 76.
  • a pair of grooves 106 are provided in the housing halves 96 and 98 for supporting L-shaped terminals 108, 110, 112, and 114.
  • Leads 84 and 86 of coil 70 are electrically and mechanically connected, such as by soldering, to terminals 108 and 110 respectively.
  • Terminals 112 and 114 are provided with fixed contacts 116 and 118 respectively which cooperate with movable contacts carried by operating member 64 to form the control switch.
  • operating member 64 is provided with a pair of upwardly extending arms 69 in which are formed notches 124.
  • a contact supporting member 128 and a coil spring 130 are received in one of the notches 124 in arrangement whereby the contact support member 128 is resiliently supported by the operating member 64.
  • Secured to the contact supporting member 128 are a pair of movable bridging contacts 132 and 134.
  • movable bridging contact 132 is positioned to engage xed contact 116 supported yby terminal 112.
  • movable bridging contact 134 is positioned to engage fixed contact 118.
  • the iixed portion of the magnetic assembly comprising magnetic members 74, 76, and 78 is assembled about the coil 70 and bobbin 72, and the plunger assembly 90 is positioned in the apertures in the disks and in the bobbin bore.
  • the terminals 108, 110, 112, and 114 are inserted in the grooves 106 in the housing halves 96 and 98, and the leads 84 and 86 are connected to the terminals 108 and 110.
  • the housing halves With the magnetic assembly pisitioned in one of the housing halves, the housing halves are brought together around arms 69 of the operating member 64, with the fixed contacts 11-6 and 118 positioned under the movable contacts 132 and 134.
  • tabs 136 and 138 extending therefrom fit into notches, only one of which 140 is shown, formed by the identical housing members 52 of the switch housing 48. As seen in FIG. 1, tab 138 fits into notch 140.
  • apertures are provided in the switching device insulating housing members 52 for receiving rivets 162 and 164 which secure the housing members together. Rivets 162 and 164 are also received in grooves 166 formed in tabs 136 and 138 so as to secure the holding mechanism housing 46 to the switching device housing 48.
  • the previoiusly mentioned rst type of attaching means is formed on the actuating device housing 14 by the tab 146 having the groove 152 formed therein, and on the holding mechanism housing 46 by the tab 138 having the groove 166 formed therein.
  • the previously mentioned second type of attaching means is formed on the switch housing 48 by the notch 140 along with the rivet 164, and on the holding mechanism housing by notch 144 and bar 150 which extends across the notch.
  • the rst type of attaching means formed on the actuating device housing 14 is secured to the second type of attaching means formed on the switch housing 48. That is, the tab 146 is placed in the notch 140 and the rivet 164 is then secured in the groove 152.
  • depression of the push button assembly 12 by applying an actuating force thereto causes it to engage and depress push rod 40 which in turn engages top end 168 of plunger assembly 90 and depresses the plunger assembly 90 until its downward movement is stopped by engagement of the lower end 170 of its iirst magnetic portion 92 with the top surface 172 of the cylindrical projection 80 formed on disk shaped magnetic member 76 as shown by the dashed lines in FIG. 4.
  • the fixed contacts 11-6 and 118 are not engaged by the movable contacts 132 and 134 respectively, being biased to an open position by spring 62.
  • Depression of the plunger assembly 90 causes its lower end 174 to engage the upper edge 68 of the operating member 64 so as to depress the operating member 64 and bring the movable bridging contacts 132 and 134 into engagement with the iixed 6. contacts 116 and 118, and also actuate the contacts of switching device 50.
  • the closed position of the contacts is shown in FIG. 5.
  • the plunger assembly is electromagnetically maintained in its depressed position by the energization of coil 70 through the circuit shown in FIG. 6.
  • terminals 108 and 112 are connected to each other, so as to connect fixed contact 116 to coil lead 84.
  • Terminals and 114 are connected vby conductors 176 and 178 to a source of voltage (not shown).
  • coil 70 is energized from the voltage source (not shown). Energization of the coil 70 creates a magnetic field which pass through the first fixed portion and the second movable portion of the magnetic assembly, to hold the second movable portion, and therefore plunger assembly 90 in its depressed position.
  • the second portion 94 of the plunger assembly 90 is preferably formed as a non-magnetic shaft for the reason that a magnetic path through the shaft 94 would bridge the air gap to provide a ux path such that the magnetic -feld across the air gap might be so weakened that the plunger assembly 90 would not be maintained in its actuated position. It is readily observed that maintenance of operating member 64 in its actuated position also maintains the contacts in the switching device 50 in their actuated condition.
  • the coil 70 may be deenergized by providing a suitable circuit interrupting element (not shown) in the circuit connected between terminals 108 and 112.
  • a unitary electromagnetic holding mechanism comprising:
  • said magnetic assembly including a xed magnetic portion, and a movable magnetic portion movable from an unactuated position to an actuated position;
  • said fixed magnetic portion comprising a first magnetic member surrounding the peripheral surface of said coil, a second magnetic member-covering one end of said coil and having an aperture therein in alignment with siad bore, and a third magnetic member covering the other end of said coil;
  • said movable magnetic portion comprising a fourth magnetic member received in both the bore of said coil and the aperture in said second magnetic member for reciprocal movement, whereby with said xed magnetic portion, said fourth magnetic member in said actuated position forms a magnetic path completely encircling said coil;
  • an actuatable control switch supported within said housing, said actuatable control switch having at least one ,fixed contact and at least one movable contact movable between an open circuit position and a closed circuit position relative to said fixed contact;
  • circuit means interconnecting said contacts of said actuatable control switch, said magnetic portions of said magnetic assembly, and said coil;
  • actuating means operatively associated with said magnetic assembly and said actuatable control switch for moving said movable magnetic portion of said magnetic assembly to said actuated position and said movable contact of said actuatable control switch to said closed circuit position to energize said coil in response to the actuation of said actuating means by the application thereto of an external actuating force;
  • said unitary electromagnetic holding mechanism defined in claim 1 wherein said coil is substantially enclosed within an insulating means, said first magnetic member is a tube having an inside surface which substantially conforms to the peripheral surface of said coil, said second magnetic member is a plate, said aperture in said plate being in alignment with and substantially conforming to the shape of said bore in said coil, said third magnetic member is a plate having a projection extending from one of its faces which is received in the bore of said coil, said fourth magnetic member is of substantially the same cross-section as said projection and is spaced apart from said projection in the unactuated position and engages said projection in the actuated position to form said magnetic path completely encircling said coil.
  • a unitary electromagnetic holding mechanism comprising:
  • said magnetic assembly including a fixed magnetic portion, and a movable magnetic portion movable from an unactuated position an an actuated position;
  • said fixed magnetic portion comprising a first magnetic member surrounding the peripheral surface of said coil, a second magnetic member covering one end of said coil and having an aperture therein in alignment with said bore, and a third magnetic member covering the other end of said coil;
  • said movable magnetic portion comprising a fourth magnetic member received in both the bore of said coil and the aperture in said second magnetic member for reciprocal movement, whereby with said fixed magnetic portion, said fourth magnetic member in said actuated position forms a magnetic path completely encircling said coil;
  • an actuatable control switch supported within said holding mechanism housing, said actuatable control switch having at least one fixed contact and at least one movable contact movable between an open circuit position and a closed circuit position relative to said fixed contact;
  • circuit means interconnecting at least said contacts of said actuatable control switch, said magnetic portions of said magnetic assembly, and said coil;
  • actuating means comprising said actuator enclosed in said actuator housing in operatively associated relation with said magnetic assembly and said actuable control switch for moving said movable magnetic portion of said magnetic assembly to said actuated position and said movable contact of said actuatable control switch to said closed circuit position to energize said coil in response to the actuation of said actuator by the application thereto of said actuating force, and for moving said operating member from said unactuated position thereof to said actuated position thereof to actuate said movable contact enclosed in said switch housing;
  • said coil is substantially enclosed within an insulating means
  • said iirst magnetic member is a tube having an inside surface which substantially conforms to the peripheral surface of said coil
  • said second magnetic member is a plate
  • said aperture in said plate being in alignment with and substantially conforming to the shape of said bore in said bore in said coil
  • said third magnetic member is a plate having a projection extending from one of its faces which is received in the bore of said coil
  • said fourth magnetic member is of substantially the same cross-section as said projection and is spaced apart from said projection in the unactuated position an engages said projection in the actuated position to form said magnetic path completely encircling said coil.
  • a unitary electromagnetic holding mechanism comprising:
  • said electromagnetic holding mechanism housing having one end attached to said switch housing and an opposite end attached to said actuator housing such that said holding mechanism is positioned between said switch housing and said actuator housing;
  • said magnetic assembly including a fixed magnetic portion, and a movable magnetic portion movable from an unactuated position to an actuated position;
  • said movable magnetic portion comprising a part of a plunger assembly having one end in engagement with said operating member and an opposite end in engagement with said actuator so as to operatively interconnect said switching device and said actuating device;
  • an actuatable control switch supported within said electromagnetic holding mechanism housing, said actuatable control switch having at least one fixed contact and at least one movable contact movable between an open circuit position and a closed circuit position relative to said fixed contact;
  • circuit means interconnecting at least said contacts of said actuatable control switch, said magnetic portions of said magnetic assembly, and said coil;
  • actuating means comprising said actuator enclosed in said actuator housing in operatively associated relation with said magnetic assembly and said actuatable control switch for moving said movable magnetic portion of said magnetic assembly to said actuated position and said movable contact of said actuatable control switch to said closed circuit position to energize said coil in response to the actuation of said Aactuator by the application thereto of said actuating force, and for moving said operating member from said unactuated position thereof to said actuated position thereof to actuate said movable contact enclosed in said switch housing;
  • said electromagnetic holding mechanism housing has a first type of attaching means provided at said one end and a second type of attaching means provided at said opposite end, the switch housing being provided at one end with said second type of attaching means and the actuator housing being provided with said first type of attaching means, said first and second types of attaching means being adapted to be attached to each other, whereby the switch housing may be readily attached to the actuator housing or said holding mechanism housing may readily be attached between the switch housing and the actuator houslng.
  • a unitary electromagnetic holding mechanism comprising:
  • said magnetic assembly including a fixed magnetic portion, and a movable magnetic portion movable from an unactuated position to an actuated position;
  • said electromagnetic holding mechanism housing being formed of two identical housing halves which are secured to each other with said coil and said iixed magnetic portion being secured therebetween;
  • an actuatable control switch supported within said electromagnetic holding mechanism housing, said actuatable control switch having at least one fixed contact and at least one movable contact between an open circuit position and a closed circuit position relative to said fixed contact;
  • circuit means interconnecting at least said contacts of said actuatable control switch, said magnetic portions of said magnetic assembly, and said coil;
  • actuating means comprising said actuator enclosed in said actuator housing in operatively associated relation with said magnetic assembly and said actuatable control switch for moving said movable magnetic portion of said magnetic assembly to said actuated position and said movable contact of said actuatable control switch to said closed circuit position to energize said coil in response to the actuation of said actuator by the application thereto of said actuating force, and for moving said operating member from said unactuated position thereof to said actuated position thereof to actuate said movable contact enclosed in said switch housing;
  • a unitary electromagnetic holding mechanism comprising:
  • said magnetic assembly including a iixed magnetic portion, and a movable magnetic portion movable from an unactuated position to an actuated position;
  • an actuatable control switch supported within said electromagnetic holding mechanism housing said actuatable control switch having at least one fixed contact and at least one movable contact movable between an open circuit position and a closed circuit position relative to said fixed contact;
  • said electromagnetic holding mechanism housing being formed to house therein said fixed contact and said movable contact of said control switch;
  • circuit means interconnecting at least said contacts of said actuatable control switch, said magnetic portions of said magnetic assembly, and said coil;
  • actuating means comprising said actuator enclosed in said actuator housing in operatively associated relation with said magnetic assembly and said actuatable control switch for moving said movable vmagnetic portion of said magnetic assembly to said actuated position and said movable contact of said actuatable control switch to said closed circu1t position to energize said coil in response to the actuation of said actuator by the application thereto of :said actuating force, and for moving said operating member from said unactuated position thereof to said actuated position thereof to actuate said movable contact enclosed in said switch housing;
  • said electromagnetic holding mechanism housing supports a plurality of terminals which extend through the housing, and are internally connected by said circuit means toy said coil and said control switch ixed contact, whereby connections may be made to said coil and said control switch externally of the housing.
  • a unitary electromagnetic holding mechanism comprising:
  • said magnetic assembly including a iixed magnetic portion, and a movable magnetic portion movable from an unactuated position to an actuated position;
  • said movable magnetic portion comprising a plunger assembly
  • control switch having at least one fixed contact and at least one movable contact movable between an open circuit position and a closed circuit position relative to said lixed contact in response to actuation of said control switch by said plunger assembly;
  • circuit means interconnecting said contacts of said control switch, said magnetic portions of said magnetic assembly, and said coil;
  • said actuating means comprising an actuator and a push rod, said push rod having one end in operatively associated enga-gement with said actuator and the other end in operatively associated engagement with said plunger assembly;
  • said actuating means being movable to lsaid actuated position thereof upon the application of an external actuating force to said actuator, movement of said actuator in response to the application thereto of said external actuating force being transmitted to said push rod and from said push rod to said plunger assembly to move said movable contact of able contact of said control switch and thereby with said control switch to said closed circuit position to said plunger assembly;

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Power Engineering (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Push-Button Switches (AREA)
  • Electromagnets (AREA)
  • Tumbler Switches (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Bag Frames (AREA)
  • Slide Fasteners (AREA)
US678921A 1967-10-30 1967-10-30 Electromagnetic holding mechanism Expired - Lifetime US3526863A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US67892167A 1967-10-30 1967-10-30
US71499168A 1968-03-21 1968-03-21

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US3526863A true US3526863A (en) 1970-09-01

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Application Number Title Priority Date Filing Date
US678921A Expired - Lifetime US3526863A (en) 1967-10-30 1967-10-30 Electromagnetic holding mechanism

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US (1) US3526863A (enrdf_load_stackoverflow)
DE (2) DE1765709A1 (enrdf_load_stackoverflow)
FR (1) FR1571249A (enrdf_load_stackoverflow)
GB (2) GB1233571A (enrdf_load_stackoverflow)

Cited By (9)

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US3622925A (en) * 1970-09-25 1971-11-23 Us Controls Corp Push-to-start switch
US3688234A (en) * 1970-04-27 1972-08-29 Matsushita Electric Works Ltd Push button type circuit protector
US3733568A (en) * 1971-09-30 1973-05-15 Essex Push button relay
US4345227A (en) * 1980-06-10 1982-08-17 Trw Inc. Push-on push-off switch
US4520334A (en) * 1983-10-28 1985-05-28 Eaton Corporation Pushbutton switch with remotely controlled operating attachment
EP1767128A3 (en) * 2005-09-26 2007-09-26 Strix Limited Liquid Heating vessels
US20090001070A1 (en) * 2007-06-28 2009-01-01 Strix Limited Liquid heating vessels
US20090003809A1 (en) * 2007-06-28 2009-01-01 Strix Limited Heaters for liquid heating vessels
USD649960S1 (en) * 2009-10-06 2011-12-06 Sony Corporation Microphone

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FR2460538B1 (fr) * 1978-04-21 1985-07-05 Trw Inc Dispositif de commutation a minuterie
US4478364A (en) * 1980-11-07 1984-10-23 Re-Al, Inc. Method of mounting and cleaning electrical slide switch of flush through design
DE3142070A1 (de) * 1981-10-23 1983-05-19 Brown, Boveri & Cie Ag, 6800 Mannheim Elektrischer installationsschalter
DE3606350A1 (de) * 1986-02-27 1987-09-03 Preh Elektro Feinmechanik Geraetenetzschalter
FR2634053B1 (fr) * 1988-07-05 1995-06-09 Loire Electronique Dispositif de fixation pour commutateur
CH682024A5 (enrdf_load_stackoverflow) * 1991-03-26 1993-06-30 Feller Ag
US5136132A (en) * 1991-03-28 1992-08-04 Honeywell Inc. Alternate action mechanism
DE4418707A1 (de) * 1994-05-28 1995-11-30 Teves Gmbh Alfred Schnappschalter mit gerader Bewegung des Schaltstücks sowie Schaltersystem hierzu
DE29803830U1 (de) * 1998-03-05 1998-05-07 Gebr. Berker GmbH & Co, 58579 Schalksmühle Elektrisch beleuchtbarer Drucktastschalter
CN111540639A (zh) * 2020-05-14 2020-08-14 湖南创安防爆电器有限公司 一种真空接触器

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US2611843A (en) * 1948-06-12 1952-09-23 Rotax Ltd Combined magnetic and manual switch
US3153124A (en) * 1962-12-04 1964-10-13 Illinois Tool Works Electrical reset switch mechanism

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2611843A (en) * 1948-06-12 1952-09-23 Rotax Ltd Combined magnetic and manual switch
US3153124A (en) * 1962-12-04 1964-10-13 Illinois Tool Works Electrical reset switch mechanism

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3688234A (en) * 1970-04-27 1972-08-29 Matsushita Electric Works Ltd Push button type circuit protector
US3622925A (en) * 1970-09-25 1971-11-23 Us Controls Corp Push-to-start switch
US3733568A (en) * 1971-09-30 1973-05-15 Essex Push button relay
US4345227A (en) * 1980-06-10 1982-08-17 Trw Inc. Push-on push-off switch
US4520334A (en) * 1983-10-28 1985-05-28 Eaton Corporation Pushbutton switch with remotely controlled operating attachment
EP1767128A3 (en) * 2005-09-26 2007-09-26 Strix Limited Liquid Heating vessels
US20090001070A1 (en) * 2007-06-28 2009-01-01 Strix Limited Liquid heating vessels
US20090003809A1 (en) * 2007-06-28 2009-01-01 Strix Limited Heaters for liquid heating vessels
US7783176B2 (en) 2007-06-28 2010-08-24 Strix Limited Heaters for liquid heating vessels
US8097834B2 (en) 2007-06-28 2012-01-17 Strix Limited Liquid heating vessels
USD649960S1 (en) * 2009-10-06 2011-12-06 Sony Corporation Microphone

Also Published As

Publication number Publication date
GB1233571A (enrdf_load_stackoverflow) 1971-05-26
GB1220708A (en) 1971-01-27
DE1765709A1 (de) 1971-08-26
DE1805038A1 (de) 1969-05-22
FR1571249A (enrdf_load_stackoverflow) 1969-06-13

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