US2174868A - Snap switch - Google Patents

Snap switch Download PDF

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Publication number
US2174868A
US2174868A US115528A US11552836A US2174868A US 2174868 A US2174868 A US 2174868A US 115528 A US115528 A US 115528A US 11552836 A US11552836 A US 11552836A US 2174868 A US2174868 A US 2174868A
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US
United States
Prior art keywords
diaphragm
movable contact
actuator
snap
snap switch
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
US115528A
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English (en)
Inventor
John M Coffeen
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.)
Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to US115528A priority Critical patent/US2174868A/en
Priority to GB26242/37A priority patent/GB503021A/en
Priority to FR830456D priority patent/FR830456A/fr
Priority to BE425067D priority patent/BE425067A/xx
Application granted granted Critical
Publication of US2174868A publication Critical patent/US2174868A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47K—SANITARY EQUIPMENT NOT OTHERWISE PROVIDED FOR; TOILET ACCESSORIES
    • A47K5/00—Holders or dispensers for soap, toothpaste, or the like
    • A47K5/06—Dispensers for soap
    • A47K5/10—Dispensers for soap for powdered soap
    • 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
    • H01H13/26—Snap-action arrangements depending upon deformation of elastic members
    • H01H13/48—Snap-action arrangements depending upon deformation of elastic members using buckling of disc springs
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/64—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid wherein the break is in gas

Definitions

  • PATENT OFFICE 2,114.80 sNsr swn'cn John M. oosesn. New York, N. 1:.
  • Application Deoember 1 , 1m, Serial No. 115,521;
  • the present invention provides astructure enclosing the contacts in a sealed chamber so that dust, dirt, fumes of various kinds, etc.,
  • a complemental object is to provide such a structure which will be rugged yet small in size.
  • Another object is the provision of a snap switch which requires but light pressure or very short travel of an actuator in order to be operated, and
  • a further object of the present invention is to provide a snap switch which may be produced economically, and which will be accurate and efas flcient over a long period of time and operation.
  • Features of the present invention include the provision of a dished diaphragm peripherically held in a body, with the diaphragm flexed to one 6 side of a neutral point to normally close or open a circuit when an actuator is moved by slight. presure or a slight extent, and in which the diaphragm serves to enclose contacts in a chambered or cavity section of the body.
  • Another feature is 10 the provision of a snap switch structure which may be easily and quickly assembled without critical adjustments, and which may be hermetically sealed if desired.
  • a further feature is the provision of a chamber thoroughly enclosing the 15 contacts so that there is no danger of arcing contacts igniting gas or the like in atmosphere adjacent the snap switch.
  • Figure l is a cross-sectional view, taken on line i--l of Figs. 3 and 4.
  • Fig. 2 is a side view of the snap switch. 25'
  • Fig. 3 is a sectional view taken on line 33 of Figs. 1 and.2.
  • Fig. 4 is a plan view of the base member and diaphragm or the lower half of the snap switch.
  • 8. 5 is a cross-sectional view of a modified form of snap switch.
  • Pig. 6 is a perspective view of a modified form of actuator.
  • Fig. discloses the diaphragm in various positions. 35
  • the snap switch comprises a body ill, including a base member ll having a cavity I2 and inner shoulder I3, and so a top member I4 having a cavity I5.
  • These cupped base and top members II and H are preferably made of Bakelite or other molded composition and house the various operating parts of the snap switch in a novel manner.
  • the base member I I is provided with a bore l6 adapted to receive a terminal l6 molded or forced into place with an integral flange 17 against the bottom I8 of the .cavity l2.
  • a terminal screw I9 has a threaded connection 20 with'the terminal I6.
  • may be made integral with the terminal [6 or, as shown, may be in the form of a separate washer-like plate welded, soldered or otherwise secured to the terminal I6.
  • Another stationary contact 23 may be provided, as is shown best in Figs. 1 and 3, comprising a U-shaped plate resting upon a shoulder 13 in the cavity l2 with an associated terminal 25 projecting through a bore 26 in the side wall 2'! of the base member H.
  • a terminal screw 28 is screw-threaded into the terminal 25.
  • the contact 23 and terminal 25 may be made integral or, as shown, may be more economically made from two pieces soldered or otherwise secured together. If preferred the outer end of the stationary contact 23 may be secured to the base with a small screw 30.
  • the upper member is provided with an actuator 32, comprising a stud 33 extending through a bore 33' in the upper member I4 and having a screw-threaded connection 34 to a preferably inverted cup-shaped member 36 which is locked thereon by a nut 31.
  • Figure 6 discloses a modifled form of actuator 320. like the form just described except that it is of one piece fibre or Bakelite construction.
  • a dished diaphragm 38 is provided which is normally flexed to one side of a neutral point, as may be apparent by viewing Fig. 1.
  • the diaphragm is peripherically secured to the body ID by the edges 39 and 40 of the members I I and M respectively when these members are secured together as by screws 42, extending through suitable bores 43 and 44, and associated nuts 45 which maintain the diaphragm in its original shape and set over a long period of time even though it is flexed and snapped in regular operation a great many times.
  • the screws may be dispensed with and the members merely.cemented together as described hereinafter.
  • a terminal 46 is secured to the outer edge of the diaphragm as by a slot 41 and solder.
  • a terminal screw 48 having a threaded connection 49 serves to conmeet any conventional current conducting wire to the terminal 46.
  • a stud 50 is secured to the center of the diaphragm 38 as by riveting and at its lower end is provided with a movable contact 5
  • a two-way or three-wire electrical circuit may be advantageously accomplished.
  • the diaphragm is normally flexed into the raised position shown in Fig. 1, whereupon through the stud 50 it carries and maintains the movable contact 5
  • the inverted cup member 36 presses against the dished diaphragm causing it to assume the neutral or almost flat position.
  • the present invention provides a simple and highlyefllcient apparatus to control two circuits, for example, to
  • This same switch may be used to fully open and close the circuit; for example, if it is desired to have a circuit normally closed until a predetermined condition occurs current conducting wires are connected to the terminals 46 and 25 only (not to the terminal l6) whereupon the circult is closed all the time that the diaphragm 38 is normally flexed into the position shown in Figure 1. It is normally maintained in this condition until a predetermined pressure or travel is imparted to the actuator 32. When the movable contact 5! is snapped away from the stationary contact 23 the circuit between the terminals 46 and 25 is open.
  • the various views are of enlarged
  • the entire switch may be made so that it is roughly only approximately an inch square.
  • serves very efiectively to cover the 'cavity i2 and to change the latter from a normally open cavity to an enclosed chamber protecting the various contacts from oxidizing fumes, moisture and other corroding mediums which would tend to cause the switch to arc and have a short life.
  • the assembly may be hermetically sealed by filling a channel Gil with a wax 6
  • Lugs 62 may be provided on the base member II to accommodate screws II for connecting the snap switch at. any desired location.
  • Fig. 5 discloses a modified form of the present invention which is substantially the same as the form hereinbefore described in detail.
  • This form of the invention differs from the former form primarily in the provision of a pivoted movable contact member 64 in the form of a bell crank having a pivot connection 65 on a terminal block 60.
  • Top and bottom members ii and ll of slightly difierent form are provided merely to house the difierently shaped movable contact member 84.
  • the stationary contacts are of slightly modifled form including terminals 61 and 08 connected to springs 69 and I0.
  • the current conducting wires may be connected to any or all of the terminals to pro vide a two-way closed circuit, or to provide an open and closed circuit condition in which the circuit is normally open or normally closed.
  • the screws 41 and nuts 45 are dispensed with and the members of the body thoroughly secured and sealed together as by a Bakelite cement or a wax I in the channel 60.
  • the sealing is preferably first effected in the channel 80 approximately ninety per cent around the body, excepting only a space around the terminal 46 at which point oxygen, nitrogen and other adverse and corroding atmospheric elements are evacuated from the chamber housing the contacts, and the chamber in turn is filled with a non-corroding or non-oxidizing medium element, such as inert gases such as neon, argon, helium, either alone or in a combination whereupon the space around the terminal 46 is sealed with wax or cement ii a relatively short space.
  • inert gases such as neon, argon, helium
  • the form shown in Fig. 5 has the advantage of providing a greater extent of travel to the movable contact so that the snap switch may be used to control and carry heavier electrical loads than is possible with the form shown in Figs. 1 through 4 where the movable contact travels through only Also, it has the advantage of a slight resiliency between the movable contact and the stationary contacts so that the contacts remain together during the slight initial movement of the diaphragm before the snap-over occurs.
  • the yielding type of contacts may' be also used in that form of the invention shown in Figs. 1 through 4 as will be readily appreciated by those familiar with the art to which this invention appertains.
  • a snap switch the combination of a body formed by a pair of cupped members; a diaphragm having a snap action in two directions, normally flexed to one position at one side of its neutral point and exerting a continuous reaction to return thereto when moved to a position at the other side of the neutral point; means to peripherically secure said diaphragm to the cupped members and the latter together; a pusher member engaging said diaphragm, capa bio of pushing the diaphragm over the neutral point-when a predetermined pressure is applied thereto; and contacts electrically clcsed by said diaphragm when it ,is moved to a side of the neutral point.
  • a snap switch the combination of a body; a terminal; a movable contact; a diaphragm, having a snap action in two directions, normally flexed to a position at one side of its neutral point and exerting a continuous reaction to return thereto when moved to a position at the other side of its neutral point, secured to said body, adapted to carry current from said terminal to said movable contact; a stationary contact;
  • a snap switch the combination of a base member having a cavity; a stationary contact in said cavity; a movable contact in said cavity; a diaphragm, having a snap action in two directions, normally flexed to a position at one side of its neutral point and exerting a continuous reaction to return thereto when moved to a position at the other side of its neutral point, adapted to cover said cavity and convert it into a completely enclosed chamber, to protect the contacts therein; an actuator for operating said diaphragm and movable contact; a top member; and means for securing said diaphragm and top member to the base member.
  • a snap switch the combination of a base member; a stationary contact; a movable contact; a dished diaphragm secured to the base member, having a snap action in two directions, normally flexed to a position at one side of its neutral point and exerting a continuous reaction to return thereto when moved to a position at the other side of its neutral point, and an actuator for operating said diaphragm and movable contact relative to the stationary contact.
  • a snap switch the combination of a base member; a stationary contact; a movable contact member; a pivoted support for the movable contact; a diaphragm peripherically secured to the base member, having a snap action in two directions, normally flexed to a position at one side of its neutral point and exerting a continuous reaction to return thereto whenmoved to a position at the other side of its neutral point, and an actuator for operating said diaphragm and movable contact member.
  • a base member having a cavity; at least one stationary contact in said cavity; a movable contact; a dished diaphragm, having a snap action in two directions, normally flexed to a position at one side of its neutral point and exerting a continuous reaction to return thereto when moved to a position at the other side of its neutral point; means peripherically securing said diaphragm to the base member with the movable contact substantially at the center thereof, said diaphragm covering and converting said cavity into an enclosed chamber to protect the stationary and movable contacts; and an actuator engaging the diaphragm substantially midway between the center and peripherically held sections thereof to convert a relatively short movement thereof into a relatively long movement to the center of the diaphragm and asscciatedmovable contact.
  • a snap switch the combination a base member having a cavity therein; a fixed contact in said cavity; a dished diaphragm normally flexed to one position at one side 01' its neutral point, exerting a continuous reaction to return to said position when moved to a second position at the other side of its neutral point and having a snap action in two directions, said diaphragm being peripherically secured to said base; a movable contact engageable with said fixed contact in said cavity and movable by said diaphragm; and an actuating member engageable with said diaphragm at points spaced from the center' thereof to control the action of the diaphragm to thereby move the movable contact relative to the fixed contact.
  • a snap switch the combination of a casing; circuit making and breaking means; a disc having a snap action into operative and inoperative positions in said casing to control said circuit making and breaking means; an actuator; and means for normally maintaining said disc in one of said positions, for maintaining the disc in the other of said positions only while a predetermined pressure is upon the actuator and for returning the disc automatically to the first position when less than said predetermined pressure is applied thereto.
  • a snap switch the combination of a body; a movable contact; a stationary contact; an actuator; and a diaphragm for moving themovable contact relative to the stationary contact, having operative and inoperative positions, formed to have a major stored force normally urging the diaphragm to the inoperative position and to have a minor force yieldingly maintaining said contacts together when a predetermined force is applied to the actuator, and automatically loosing the minor force and allowing the major force to automatically return the diaphragm and movable contact to the inoperative position when less than the predetermined force is applied to the actuator JOHN Iii. COEFEEN.

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  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Thermally Actuated Switches (AREA)
  • Switches Operated By Changes In Physical Conditions (AREA)
US115528A 1936-12-12 1936-12-12 Snap switch Expired - Lifetime US2174868A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US115528A US2174868A (en) 1936-12-12 1936-12-12 Snap switch
GB26242/37A GB503021A (en) 1936-12-12 1937-09-28 Improvements in or relating to snap-action electric switches
FR830456D FR830456A (fr) 1936-12-12 1937-12-06 Perfectionnements aux interrupteurs à action brusque
BE425067D BE425067A (en)) 1936-12-12 1937-12-07

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US115528A US2174868A (en) 1936-12-12 1936-12-12 Snap switch

Publications (1)

Publication Number Publication Date
US2174868A true US2174868A (en) 1939-10-03

Family

ID=22361961

Family Applications (1)

Application Number Title Priority Date Filing Date
US115528A Expired - Lifetime US2174868A (en) 1936-12-12 1936-12-12 Snap switch

Country Status (4)

Country Link
US (1) US2174868A (en))
BE (1) BE425067A (en))
FR (1) FR830456A (en))
GB (1) GB503021A (en))

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2418222A (en) * 1943-02-05 1947-04-01 First Ind Corp Overtravel switch actuator
US2420880A (en) * 1944-04-12 1947-05-20 Robert Hetherington & Son Inc Snap switch
US2450924A (en) * 1941-02-08 1948-10-12 Pierce John B Foundation Electromagnetic switch
US2652857A (en) * 1950-07-28 1953-09-22 Paul Engstrum Associates Inc Valve assembly
US2913007A (en) * 1955-12-19 1959-11-17 Halax Corp Diaphragm mounting
US3133170A (en) * 1961-07-14 1964-05-12 Robert N Nanninga Snap switch having a concavo-convex diaphragm
US20100236912A1 (en) * 2009-03-20 2010-09-23 Honeywell International Inc. Snap action switch with a non-metal interchangeable spring

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2450924A (en) * 1941-02-08 1948-10-12 Pierce John B Foundation Electromagnetic switch
US2418222A (en) * 1943-02-05 1947-04-01 First Ind Corp Overtravel switch actuator
US2420880A (en) * 1944-04-12 1947-05-20 Robert Hetherington & Son Inc Snap switch
US2652857A (en) * 1950-07-28 1953-09-22 Paul Engstrum Associates Inc Valve assembly
US2913007A (en) * 1955-12-19 1959-11-17 Halax Corp Diaphragm mounting
US3133170A (en) * 1961-07-14 1964-05-12 Robert N Nanninga Snap switch having a concavo-convex diaphragm
US20100236912A1 (en) * 2009-03-20 2010-09-23 Honeywell International Inc. Snap action switch with a non-metal interchangeable spring

Also Published As

Publication number Publication date
FR830456A (fr) 1938-08-01
BE425067A (en)) 1938-01-31
GB503021A (en) 1939-03-28

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