US2378784A - Snap-action switch - Google Patents

Snap-action switch Download PDF

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Publication number
US2378784A
US2378784A US479180A US47918043A US2378784A US 2378784 A US2378784 A US 2378784A US 479180 A US479180 A US 479180A US 47918043 A US47918043 A US 47918043A US 2378784 A US2378784 A US 2378784A
Authority
US
United States
Prior art keywords
contact
switch
snap
movement
actuating member
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
US479180A
Other languages
English (en)
Inventor
Obszarny Thedore
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.)
Guardian Electric Manufacturing Co
Original Assignee
Guardian Electric Manufacturing Co
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
Priority to BE482394D priority Critical patent/BE482394A/xx
Application filed by Guardian Electric Manufacturing Co filed Critical Guardian Electric Manufacturing Co
Priority to US479180A priority patent/US2378784A/en
Application granted granted Critical
Publication of US2378784A publication Critical patent/US2378784A/en
Priority to GB4836/48A priority patent/GB646476A/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
    • H01H5/00—Snap-action arrangements, i.e. in which during a single opening operation or a single closing operation energy is first stored and then released to produce or assist the contact movement
    • H01H5/04—Energy stored by deformation of elastic members
    • H01H5/06—Energy stored by deformation of elastic members by compression or extension of coil springs
    • Y—GENERAL 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/18—Mechanical movements
    • Y10T74/18888—Reciprocating to or from oscillating
    • Y10T74/18896—Snap action

Definitions

  • This invention relates to electrical switches a cooperating resilient actuating member, and of the snap-action type, -adapted for rapidly wherein one of the members is formed with a making and breaking electrical circuits.
  • yoke portion disposed in surrounding relation to More particularly my invention is directed to the free end portion of the other member, and snap-action switches of the blade type adapted 5 wherein the free ends of said members are interfor controlling either single or multiple circuits, connected by a coil spring toggle serving to norand wherein such switches are usually of a relamally urge the free ends of the members apart.
  • the present invention is directed to improvereliively Small r light force to effect operation ments in snap switches of the type referred to thereof.
  • a further object is .to provide a novel form and over the switches of this general type now availarrangement cf stop means, which is in .the na- Bille Practically 91,11, include e movable member ture of a cantilever member, positioned to be or element formed of a strip of spring metal directly engaged by the actuating member for which is mifmuy deformeg 'to provide what is limiting i-ts movement in one direction and by known as a sensitive area to which area presvirtue of its construction, is adapted to permit Sure is applied @C produce mixing of the Contact a slight excessive amount of movement of the frying portion of the member with a snap actuating member, as a safety factor, in the event action.
  • Figure 6f is a top Plan View 0f a modified fOrm for a certain period of time. 60 of snap switch, embodying the present invention.
  • Figure 7 is a side elevational view of the modiimprovemen-ts in a switch of the type disclosed iicd i0rm 0f my SWiiChin my copending application Serial No. 465,332,
  • Figure 8 is a .transverse sectional view through filed November l2, 1942, wherein I employ an the switch taken substantially as indicated on elongated, resilient, movable contact member and lines 8--8v of Figure 7.
  • Figure 9 is an end elevational view of the contact making and breaking end of the switch.
  • said switch is of the so-called stack type and includes a pair of superimposed, elongated, relatively rigid spaced apart contact bars or fingers IU and II provided at their outer ends with contact buttons I la and IIa respectively.
  • the contact bars are rigidly mounted at their rear ends in insulated relation to each other between a plurality of insulated blocks or waters I I.
  • a relatively resilient, elongated, movable contact switch member I5 mounted at its free end, on opposite sides thereof, with contact buttons I5a and I 5b adapted to cooperate respectively with the contact buttons Ia and II a of the contact bars I and II. ⁇ The movable contact mem.
  • ber I is mounted at its rear end in the stack of insulating blocks I l, in spaced insulated relation to the contact members I0 and II as seen in the drawings.
  • the relatively rigid contact .bars I0 and II and movable contact member I5 are provided at their rear ends with laterally extending ears or lugs indicated at IIlc, IIc and I5c respectively, to which may be conveniently connected, as by solderingl conductor wires of the electrical circuit to be controlled by the switch.
  • the insulating blocks Il and switch elements, as well as the yoke member I8, are each provided with a pair of aligned apertures in which are snugly fitted tubular insulating sleeves I9. so as to positively insulate the relatively rigid contact bars I0 and I I, and the movable switch member I5 from each other.
  • the stack of insulating blocks are capped, both at the top and bottom, by metal plates 20, and the total stack assembly is adapted to be secured to a convenient mounting by means of screws or bolts as indicated at 2 I.
  • opening Ia of the yoke of the actuating member I5 is so dimensioned as to permit free relative movement of the free end portion of the movable contact member and actuating member relatively to each other.
  • the extreme outer free end portion of the movable contact member I5 is provided with a projection I5d, which is in the nature of a tapered tang, and the yoke member, at the adjacent inner edge of the opening, is provided with a projection ⁇ ltd extending in the direction of the projection I5d, and which likewise is in the form of a tapered tang.
  • the marginal edge portions of the respective members I5 and I8 immediately adjacent the respective projections serve as abutment shoulders,
  • the two members I5 and I8 are interconnected at their free outer ends by a toggle spring arrangement which includes a pair of flanged tubular eyelets 22 and 23 disposed in telescoping relation to each other, with their flanged ends surrounding the projections I5d and Ild of said members, and seated against said abutment :,svavas shoulders.
  • a coil spring 25 surrounds the telescoping eyelets and abuts against the inner face of the ilanges of the respective eyelets, tending to urge the eyelets apart, and likewise tending to 5 urge the free end portions of the respective members Il and I8 apart. as seen in Figures 2 and 3 of the drawings.
  • the extreme outer end portion of the actuating end portion I8 is provided with a plug 21 of insulating material, which is adapted to be engaged by any suitable element foi applying the force or pressure to the actuating member for causing it to move from the position seen in Figure 2 of the drawings to the position seen in Figure 3 of the drawings.
  • the actuating member I8 is so constructed that when pressure on the plug 21 is released, the switch parts automatically resume a position as seen in Figure 2 of the drawings. It is to be understood however that the actuating member I8 may be so constructed that the switch parts may remain relatively stable in either of its two positions of adjustment as indicated in Figures 2 and 3 of the drawings, while still obtaining the same substantial advantages of the snap-action employed.
  • I provide suitable stop means in the form of relatively rigid elongated strips of insulating material as indicated at l0, mounted against the undersurface of the respective contact bars I0 and I I and having their ends mounted in the stack assembly between the insulating blocks Il so as to become a fixed part of the total assembly.
  • the insulating strips 30 are approximately of the same width as the overall width of the actuating member Il and are thus engageable by 'said member for limiting the movement thereof in either direction. as clearly seen in the drawings.
  • the outer ends of the insulating strips 38 are formed with arcuate notches l8l so as to provide clearance around the contact buttons Ilia and ila respectively, to avoid possible interference with the making of proper contact with the contact buttons lia and IIb of the movable contactmember.
  • the actuating member I8 is moved through too great a range, there is a normal tendency for the eyelets 22 and 23 to become disengaged and render the switch inoperative. Further, such excessive movement decreases the pressure of the coil spring 25 and thus decreases the eil'ective pressure between the contact buttons. It is highly desired that the pressure between the contact buttons be oi suilicient quantity, in order to insure making of good electrical contact.
  • the actuating member is arrested at a proper position, at opposite ends of a desired operating range of movement, at which it is possible to obtain the use oi' the full force of the coil spring 28 for maintaining the contact buttons in ilrm engagement with each other. 'I'he stops also serve the purpose of eliminating the tendency to deform the actuating member I8, which may result by movement thereof through too great a range, and which would impair proper snap-action operation.
  • an elongated base member of suitable insulating material which serves as the mounting for the snapaction switch.
  • Rigidly mounted at one end of the base 88 is a relatively flexible elongated actuating member 88 and a relatively iiexible elongated movable contact member 31, the latter being formed as a yoke and dimensioned with respect to the actuating member 36 so as to permit rela-'- tive movement of the free end portions of the movable member relatively to each other.
  • Said members are rigidly secured at one end, on said base by means ofA rivets 39.
  • Mounted between the mounting ends of the respective members is a terminal plate 4
  • movable contact member l1 which is of yoke formation, is provided at its opposite faces with contact buttons 31a and I'lb, adapted to engage respectively with contact buttons 44a and 45a of a pair of contact strips 44 and 45, rigidly attached to the opposite end of the base 40, at the underside thereof, as clearly seen in the drawings.
  • the lower ends of said strips terminate in ears 44h and 45h.
  • Said terminal ears 4ia, 44h and 45h are adapted to be connected, such as by soldering, to conductor wires for embodying the switch in an electrical circuit.
  • the head 48 of the plunger pin serves as a stop i'or limiting the position of the actuating member I8 in one direction.
  • -I provide a relatively rigid cantilever stop BI, mounted at one end on top of the movable contact member 3l, by means of the rivets 38.
  • the stop arrangement provided herein serves to limit the range of movement of the actuating member 38, so as to utilize and obtain the maximum advantage of the spring pressure of the toggle connection forf insuring proper pressure between the cooperating contact buttons.
  • a unitary, stack type, snap-action switch assembly comprising a pair of elongated, relatively rigid contact bars disposed in aligned, spaced apart relation, an elongated, resilient contact member movable into and out of engagement with said contact bars, an elongated, resilient actuating member, said members extending in alignment with said bars and rigidly connected at one end and the free end portion of one member being formed as a yoke and disposed in surrounding relation to the free end portion oi the other member, said contact bars being rigidly connected at one end in insulated relation to said rigidly connected ends of said members, the free end portions of said members being provided with projections extending toward each other, a spring toggle connection including a coil spring mounted on said projections and urging the free ends of said members apart, whereby movement of the outer free end portion oi the actuating member through and beyond the plane of the free end of the movable contact member effects movement of the later with a snap-action into and out oi.' engagement with said contact bars, and stop means
  • a unitary, stack type, snap-action switch assembly comprising a pair of elongated, relatively rigid contact bars disposed in aligned, spaced apart relation, an elongated. resilient contact member movable into and out of engagement with said contact bars, an elongated. resilient actuating member, said members extending in alignment with said bars and rigidly connected at one end and the free end portion o! one member being formed as a yoke and disposed in surrounding relation to the free end portion of the other member, said contact bars being rigidly connected at one end in insulated relation to said rigidly connected ends o!
  • a spring toggle connection including a coil spring mounted on said projections and m1- ing the tree ends o! said members apart, whereby movement o! the outer free end portion of the actautins member through and beyond tbe piane oi the free end oi the movable contact member eilects movement o! the latter with a snap-action into and out of engagement with said contact bars.
  • stop means positioned to be engaged by said actuating member for limiting its movement in both directions, said stop means eamprising a pair of relatively rigid strips of insulating material seated respectively against the inner surfaces of said contact bars and rigidly connected at one end to the assembly of said bars and members.

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  • Push-Button Switches (AREA)
US479180A 1943-03-15 1943-03-15 Snap-action switch Expired - Lifetime US2378784A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
BE482394D BE482394A (en:Method) 1943-03-15
US479180A US2378784A (en) 1943-03-15 1943-03-15 Snap-action switch
GB4836/48A GB646476A (en) 1943-03-15 1948-02-18 Snap action electric switch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US479180A US2378784A (en) 1943-03-15 1943-03-15 Snap-action switch

Publications (1)

Publication Number Publication Date
US2378784A true US2378784A (en) 1945-06-19

Family

ID=23902977

Family Applications (1)

Application Number Title Priority Date Filing Date
US479180A Expired - Lifetime US2378784A (en) 1943-03-15 1943-03-15 Snap-action switch

Country Status (3)

Country Link
US (1) US2378784A (en:Method)
BE (1) BE482394A (en:Method)
GB (1) GB646476A (en:Method)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2475038A (en) * 1946-09-28 1949-07-05 Alfred R Lucas Motor starting and safety switch
US2477408A (en) * 1946-08-30 1949-07-26 Henry R Gross Flasher
US2521015A (en) * 1946-12-27 1950-09-05 W L Maxson Corp Snap over toggle switch mechanism
US2532383A (en) * 1947-03-20 1950-12-05 Sampsel Time Control Inc Warm air limit control switch
US2945107A (en) * 1957-12-12 1960-07-12 Westinghouse Air Brake Co Electrical relays
US2952752A (en) * 1956-11-07 1960-09-13 W L Maxson Corp Basic sensing element, adjustable manual reset acceleration switch
US3240893A (en) * 1963-06-18 1966-03-15 F & F Entpr Inc Snap action electric stack switch with adjustable damper connected to its leaf springs
CN103165304A (zh) * 2011-12-15 2013-06-19 施耐德电器工业公司 电开关设备中的辅助触点致动装置

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2477408A (en) * 1946-08-30 1949-07-26 Henry R Gross Flasher
US2475038A (en) * 1946-09-28 1949-07-05 Alfred R Lucas Motor starting and safety switch
US2521015A (en) * 1946-12-27 1950-09-05 W L Maxson Corp Snap over toggle switch mechanism
US2532383A (en) * 1947-03-20 1950-12-05 Sampsel Time Control Inc Warm air limit control switch
US2952752A (en) * 1956-11-07 1960-09-13 W L Maxson Corp Basic sensing element, adjustable manual reset acceleration switch
US2945107A (en) * 1957-12-12 1960-07-12 Westinghouse Air Brake Co Electrical relays
US3240893A (en) * 1963-06-18 1966-03-15 F & F Entpr Inc Snap action electric stack switch with adjustable damper connected to its leaf springs
CN103165304A (zh) * 2011-12-15 2013-06-19 施耐德电器工业公司 电开关设备中的辅助触点致动装置
EP2605264A1 (fr) * 2011-12-15 2013-06-19 Schneider Electric Industries SAS Dispositif d'actionnement des contacts auxiliaires dans un appareil de coupure électrique
FR2984588A1 (fr) * 2011-12-15 2013-06-21 Schneider Electric Ind Sas Dispositif d'actionnement des contacts auxiliaires dans un appareil de coupure electrique
CN103165304B (zh) * 2011-12-15 2018-09-21 施耐德电器工业公司 电开关设备中的辅助触点致动装置

Also Published As

Publication number Publication date
GB646476A (en) 1950-11-22
BE482394A (en:Method)

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