US3141075A - Electrical snap-action switch - Google Patents

Electrical snap-action switch Download PDF

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Publication number
US3141075A
US3141075A US261998A US26199863A US3141075A US 3141075 A US3141075 A US 3141075A US 261998 A US261998 A US 261998A US 26199863 A US26199863 A US 26199863A US 3141075 A US3141075 A US 3141075A
Authority
US
United States
Prior art keywords
blade
switch
posts
arms
spring
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
US261998A
Other languages
English (en)
Inventor
Arnold A Brevick
Jr Walter L Cherry
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.)
Cherry Corp
Original Assignee
Cherry Electrical Products 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
Priority to NL126478D priority Critical patent/NL126478C/xx
Priority to NL295780D priority patent/NL295780A/xx
Application filed by Cherry Electrical Products Corp filed Critical Cherry Electrical Products Corp
Priority to US261998A priority patent/US3141075A/en
Priority to FR939830A priority patent/FR1361230A/fr
Priority to GB28394/63A priority patent/GB1014906A/en
Priority to DEC30578A priority patent/DE1195849B/de
Application granted granted Critical
Publication of US3141075A publication Critical patent/US3141075A/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
    • 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
    • H01H13/28—Snap-action arrangements depending upon deformation of elastic members using compression or extension of coil springs
    • 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
    • H01H13/12—Movable parts; Contacts mounted thereon
    • H01H13/14—Operating parts, e.g. push-button
    • H01H13/18—Operating parts, e.g. push-button adapted for actuation at a limit or other predetermined position in the path of a body, the relative movement of switch and body being primarily for a purpose other than the actuation of the switch, e.g. door switch, limit switch, floor-levelling switch of a lift
    • H01H13/186—Operating parts, e.g. push-button adapted for actuation at a limit or other predetermined position in the path of a body, the relative movement of switch and body being primarily for a purpose other than the actuation of the switch, e.g. door switch, limit switch, floor-levelling switch of a lift wherein the pushbutton is rectilinearly actuated by a lever pivoting on the housing of the switch

Definitions

  • An object of this invention is to provide in a switch of this character an arrangement of parts that are so related to each other and to the switch housing .that they require a minimum amount of space without interfering with the switching action.
  • Another object of this invention is to provide, in a switch of this character, a coil spring over-centering mechanism that requires extremely light operating and switch-contaot-releasing forces and provides a maximum amount of overtravel or continued switch actuating movement after the over-centering of the switch contacts without bottoming or damage to the switch mechanism.
  • a further object of this invention is, in a switch of this character, of a means for connecting an actuating lever in different relations to the switch actuator to vary the force and length of movement required to operate the switch with a snap action.
  • Yet another object of this invention is an arrangement of parts in a switch of this character which permits 'the switch housing to be of a minimum thickness while permitting the use of the desired coil spring over-centering construction.
  • the invention consists in ⁇ the novel combination and arrangement of parts to be hereinafter described and claimed.
  • FIG. l is a side elevational view of lthe assembled switch
  • FIG. 2 is a side elevational view of the switch showing the housing in opened condition and the relation of each half of the casing with respect to each other and to the internal switch mechanism;
  • FIG. 3 is a side view of the switch blade
  • FIG. 4 is a top plan view of the switch blade of this invention.
  • FIG. 5 is a perspective view of the combination switch blade pivotal posts and terminal member
  • FIG. 6 is a side view of the coil spring as employed in this invention.
  • FIG. 7 is an enlarged fragmentary side elevational view of the pivotal connection for the movable switch blade of our improved switch.
  • FIG. 8 is a perspective view of the switch actuator.
  • the switch of this invention includes a housing 10 which comprises an inter-locking caved case 11 and cover 12 which are adapted to be joined together by means of a rivet 13 or the like extending through aligned holes 14 formed in each.
  • the first fixed contact 16 lies in parallel relation with the inner surfaces of the top wall 3,141,075 Patented July 14., 1964 ICC 20 of the housing 10 which defines the cavity 15, while the second fixed contact 17 lies in parallel relation with the inner surface of the bottom wall 21 of the housing 10 which deiines the cavity 15.
  • the fixed cont-acts 16 and 17 are so formed and soV positioned as to extend in parallel spaced apart opposite directions with respect to each other and to lie in the same vertical plane adjacent one end of the cavity 15, as seen in FIG. 2.
  • a third combination terminal and support bracket 22 extends through .the bottom wall 21 of the housing 10 in a spaced parallel relation with respect tothe terminals 18 and 19. Within the cavity 15 of the housing 10 the bracket portion of the terminal 22 provides a pair of spaced apart horizontally extending supporting bars 23 which terminate into vertically extending pivot posts 24. These pivot posts 24 are joined together by a top member 25 as seen in FIG. 5.
  • a lug 26 Extending vertically from between the bars 23 and lying in the same general longitudinal plane defined by the terminal bracket 22, is a lug 26.
  • This lug 26 is so constructed as to be slightly angled in the direction of the pivotal posts 24 and to be disposed in the vertical plane extending between such posts 24 as seen in FIG. 5.
  • This lug 26 has formed therein an ⁇ aperture 27 and has its top edge 28 notched for a purpose hereinafter made apparent.
  • Each of the pivotal posts 24 has its one surface which faces away from lug 26, notched as at 29.
  • Each of the pivot posts 24 has its outer edge cut out as at 30 through the horizontal plane of the notch 29 as seen in FIG. 5.
  • a contact-bearing switch blade 31 substantially U- shaped in configuration is formed from an elongated llat blank of material.
  • Each arm 32 of the U-shaped switch blade 31 is V-bent as at 33 out of its normal longitudinal plane.
  • the inner edge portions adjacent the free ends 34 of each of the arms 32 of the U-shaped blade 31, as well as a portion of the reverse leg 35 of the V-bend 33 is notched so as to provide restraining lingers 36.
  • restraining fingers 36 extend through the normal longitudinal plane of the blade 31 and will project through the edges notches 30 formed in the pivot posts 24 when the switch blade 31 is pivotally connected thereto.
  • the notched edge 37 of each of the reverse legs 35 of each arm 32 will provide a sharp corner which will seat in .the vertex of the notch 29 formed in each pivotal post 24, and thus provide a friction-free pivotal connection between vthe blade 31 and the posts 24.
  • the iswitch blade 31 is pivotally connected to the pivot posts 24 through the use of a coil spring V38.
  • This spring 38 is provided at one end with a hook portion 39 while the opposite end is formed to provide an elongated neck 40 which terminates into a hook 41 which extends in a direction opposite to that of the hook portion 39 as shown in FIG. 6.
  • This construction of the coil spring 38 permits the coils thereof to lie intermediate the lug 26 and the pivot posts 24, with the neck 40 extending beneath the cross member 25 and between the pivot posts 24.
  • the hook portion 39 will sit in the notch 28 and have its free end projected through the aperture 27 formed in the lug 26.
  • the hook 41 will project upwardly through a slot 42 cut diagonally in the switch blade 31 with the neck 40 of the spring extending between the arms 32 of the blade 31 and beneath a bearing portion 43 thereof as shown in FIG. 4.
  • the base of the notch 28 formed in the top edge of the stud 26 lies in an elevated plane with respect to the vertex of the notches 29 formed in one face of the pivot posts 24, so that the normal horizontal plane of the coil spring 38, when connected to the switch blade 31 and the lug 26, will be above the horizontal plane of the blade 31, thus tending to overcenter -such blade 31 so that the contact 44 carried by the cantilevered end 45 thereof is normally in Contact with the first fixed contact 16 as seen in FIG. 2.
  • switch actuator 46 Extending through a suitable opening formed in the top wall of the housing is a switch actuator 46.
  • This switch actuator is provided with laterally projecting partial shoulders 47 which are adapted to be slidably contained in guiding grooves 48 formed in the inner faces of the case 11 and cover 12.
  • the bottom face of the actuator 46 is recessed as at 49.
  • the coils of the coil spring 38 will sit in the recess 49 formed in the bottom face of the actuator 46 as seen in FIG. 7.
  • This bottoming of the actuator 46 will prevent damage to the coil spring 38 as well as the switch blade 31.
  • the coils of the spring 38 are permitted to pass between the supporting arms 23 of the terminal 22 and as the bottom wall 21 which defines the cavity 1S is relieved as at 51, the coil spring 38 will not be damaged by possible engagement therewith when it is caused to be moved downwardly between the arms 23.
  • This sub-miniature snap-action switch provides a novel arrangement for pivotally mounting an external actuator lever 52.
  • This mounting includes vertically extending ears 53 integrally formed as extensions of the side walls of the case 11 and cover 12 as seen in FIGS. 1 and 2.
  • Each of the ears 53 has formed in confronting faces a series of horizontally aligned detents 54.
  • the actuating lever 52 adjacent one end thereof is provided with laterally extending studs 55, which studs are adapted to be pivotally projected into opposite detents 54 formed in the ears 53.
  • Our improved switch also provides a simple method of pre-determining the required amount of actuating force and distance of travel of the switch actuator through the novel means of pivotally connecting the actuator lever to the switch housing.
  • a snap-action switch comprising, in combination,
  • an integral terminal and pivot bracket including as a pre-assembled unit a pivotal switch blade and an overcentering mechanism
  • bracket having a pair of spaced apart horizontally extending supporting arms
  • said overcentering mechanism including a coil spring having one end connected to the free end of said lug and its opposite end connected to said blade
  • said spring having its coils positioned intermediate said lug and said pivot posts and having an elongated neck portion extending between said posts beneath said cross member and under a portion of said blade so that said spring will lie between said arms of said bracket in an elevated horizontal plane with respect to the normal plane of said blade so as to overcenter said blade into a first contact position
  • a snap action switch as defined by claim 1 wherein said horizontally extending supporting arms are of a length whereby said lug is positioned adjacent one end wall of said housing while said pivotal posts are positioned adjacent the path of said actuator as it moves through said hollow housing, and said inter-locking case and cover each providing guiding recesses extending parallel to said pivot posts for receiving a portion of said actuator so as to guide said actuator as it moves through said housing into engagement with said arms.
  • bracket including spaced apart supporting arms extending in a horizontal plane relative to the pivotal switch blade
  • each of said posts provided with a fulcrum line extending beneath and parallel to said cross member and adapted to receive an angle portion of the blade formed intermediate its ends
  • bracket providing a terminal extending transversely to said supporting arms and adapted to project out ofthe switch housing
  • (l) means on said actuator disposed to either side of said spring for bottoming on said supporting arms as said spring is moved therebetween to prevent unlimited movement of said actuator in one direction through said hollow housing.
  • a snap action switch as dened by claim 5 wherein said horizontally extending supporting arms are of a length whereby said extension and said terminal are positioned adjacent one end wall or said housing while said pivot posts are positioned adjacent the path of said actuator as it moves through said hollow housing, and said means on said actuator comprising shoulder portions which extend on either side of said spring with said shoulder portions adapted to bottom on said arms when said spring is moved between said arms, and said hollow housing providing guiding recesses therein extending parallelly to said pivot posts for receiving said shoulder portions of said actuator so as to guide said actuator as it moves through said housing into engagement with said arms.

Landscapes

  • Mechanisms For Operating Contacts (AREA)
  • Switches With Compound Operations (AREA)
  • Push-Button Switches (AREA)
  • Tumbler Switches (AREA)
US261998A 1963-03-01 1963-03-01 Electrical snap-action switch Expired - Lifetime US3141075A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
NL126478D NL126478C (enrdf_load_stackoverflow) 1963-03-01
NL295780D NL295780A (enrdf_load_stackoverflow) 1963-03-01
US261998A US3141075A (en) 1963-03-01 1963-03-01 Electrical snap-action switch
FR939830A FR1361230A (fr) 1963-03-01 1963-06-28 Commutateur à fermeture et rupture brusques
GB28394/63A GB1014906A (en) 1963-03-01 1963-07-18 Electrical snap-action switch
DEC30578A DE1195849B (de) 1963-03-01 1963-07-30 Elektrischer Schnappschalter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US261998A US3141075A (en) 1963-03-01 1963-03-01 Electrical snap-action switch

Publications (1)

Publication Number Publication Date
US3141075A true US3141075A (en) 1964-07-14

Family

ID=22995760

Family Applications (1)

Application Number Title Priority Date Filing Date
US261998A Expired - Lifetime US3141075A (en) 1963-03-01 1963-03-01 Electrical snap-action switch

Country Status (5)

Country Link
US (1) US3141075A (enrdf_load_stackoverflow)
DE (1) DE1195849B (enrdf_load_stackoverflow)
FR (1) FR1361230A (enrdf_load_stackoverflow)
GB (1) GB1014906A (enrdf_load_stackoverflow)
NL (2) NL295780A (enrdf_load_stackoverflow)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3436699A (en) * 1967-07-31 1969-04-01 Cherry Electrical Prod Magnetic pulse switch actuator
US3493707A (en) * 1968-06-10 1970-02-03 Cherry Electrical Prod Electric switch operating means
US3755642A (en) * 1972-05-17 1973-08-28 Robertshaw Controls Co Lever means for an electrical switch construction or the like and method of making the same
US4394553A (en) * 1981-04-23 1983-07-19 Amf Incorporated Snap action switch
US4673778A (en) * 1985-02-05 1987-06-16 The Cherry Corporation Snap action switch
US4897649A (en) * 1986-12-02 1990-01-30 Stucki Larry R Keyboard for data entry on control purposes
US4929808A (en) * 1989-06-13 1990-05-29 Otto Engineering, Inc. Electrical switch component and switches formed thereby
US5432311A (en) * 1993-12-06 1995-07-11 Shin Jiuh Corp. Common conducting unit for a contact switch
US5871087A (en) * 1993-12-21 1999-02-16 Shin Jiuh Corp. Common conductor assembly for a contact switch

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE467294A (enrdf_load_stackoverflow) * 1967-02-04 1900-01-01
FR2581240B1 (fr) * 1985-04-29 1988-12-23 Crouzet Sa Interrupteur a action brusque

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2648234A (en) * 1950-06-10 1953-08-11 Honeywell Regulator Co Momentary action actuator
US2821587A (en) * 1955-02-02 1958-01-28 Cherry Electrical Prod Snap-action switch
FR1196660A (fr) * 1958-06-05 1959-11-25 Contacteur à action brusque
US3073923A (en) * 1959-08-20 1963-01-15 Cherry Electrical Prod Electric snap-action switch
US3098904A (en) * 1961-07-21 1963-07-23 Cherry Electrical Prod Snap action switch

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE550695A (enrdf_load_stackoverflow) * 1951-03-30
CH316925A (de) * 1953-07-31 1956-10-31 Feller Ag Adolf Kipphebelschalter
US2752446A (en) * 1953-10-19 1956-06-26 John E Carlson Snap switch
DE947502C (de) * 1954-04-03 1956-08-16 Gross A G Temperaturregler fuer Elektrowaermegeraete

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2648234A (en) * 1950-06-10 1953-08-11 Honeywell Regulator Co Momentary action actuator
US2821587A (en) * 1955-02-02 1958-01-28 Cherry Electrical Prod Snap-action switch
FR1196660A (fr) * 1958-06-05 1959-11-25 Contacteur à action brusque
US3073923A (en) * 1959-08-20 1963-01-15 Cherry Electrical Prod Electric snap-action switch
US3098904A (en) * 1961-07-21 1963-07-23 Cherry Electrical Prod Snap action switch

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3436699A (en) * 1967-07-31 1969-04-01 Cherry Electrical Prod Magnetic pulse switch actuator
US3493707A (en) * 1968-06-10 1970-02-03 Cherry Electrical Prod Electric switch operating means
US3755642A (en) * 1972-05-17 1973-08-28 Robertshaw Controls Co Lever means for an electrical switch construction or the like and method of making the same
US4394553A (en) * 1981-04-23 1983-07-19 Amf Incorporated Snap action switch
US4673778A (en) * 1985-02-05 1987-06-16 The Cherry Corporation Snap action switch
US4897649A (en) * 1986-12-02 1990-01-30 Stucki Larry R Keyboard for data entry on control purposes
US4929808A (en) * 1989-06-13 1990-05-29 Otto Engineering, Inc. Electrical switch component and switches formed thereby
US5432311A (en) * 1993-12-06 1995-07-11 Shin Jiuh Corp. Common conducting unit for a contact switch
US5871087A (en) * 1993-12-21 1999-02-16 Shin Jiuh Corp. Common conductor assembly for a contact switch

Also Published As

Publication number Publication date
NL126478C (enrdf_load_stackoverflow)
DE1195849B (de) 1965-07-01
GB1014906A (en) 1965-12-31
FR1361230A (fr) 1964-05-15
NL295780A (enrdf_load_stackoverflow)

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