US3860775A - Electrical switch having movable spring contacts which provide wiping action with associated stationary contacts - Google Patents

Electrical switch having movable spring contacts which provide wiping action with associated stationary contacts Download PDF

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Publication number
US3860775A
US3860775A US416489A US41648973A US3860775A US 3860775 A US3860775 A US 3860775A US 416489 A US416489 A US 416489A US 41648973 A US41648973 A US 41648973A US 3860775 A US3860775 A US 3860775A
Authority
US
United States
Prior art keywords
support member
actuator
switch
contacts
contact means
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
US416489A
Other languages
English (en)
Inventor
John Albert Koepke
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.)
Illinois Tool Works Inc
Original Assignee
Illinois Tool Works Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Illinois Tool Works Inc filed Critical Illinois Tool Works Inc
Priority to US416489A priority Critical patent/US3860775A/en
Priority to CA212,634A priority patent/CA1004716A/en
Priority to AU75127/74A priority patent/AU470522B2/en
Priority to GB48752/74A priority patent/GB1482423A/en
Priority to BR9558/74A priority patent/BR7409558A/pt
Priority to NL7414938A priority patent/NL7414938A/xx
Priority to FR7437744A priority patent/FR2251902B1/fr
Priority to IT29478/74A priority patent/IT1025732B/it
Priority to JP13123474A priority patent/JPS5731604B2/ja
Priority to DE19742454388 priority patent/DE2454388C3/de
Application granted granted Critical
Publication of US3860775A publication Critical patent/US3860775A/en
Priority to US54525675 priority patent/USRE28555E/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
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/20—Bridging contacts
    • H01H1/2083—Bridging contact surfaces directed at an oblique angle with respect to the movement of the bridge
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/36—Contacts characterised by the manner in which co-operating contacts engage by sliding
    • H01H1/365—Bridging contacts
    • 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
    • H01H13/04—Cases; Covers
    • 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

Definitions

  • An electrical switch which has a plastic actuator and one or more movable spring contacts, each of which provide wiping action with a pair of stationary contacts, is disclosed.
  • the stationary contacts are secured to the inner end of rigid leads that are mounted in channels formed in the housing.
  • Each switching station of the switch may be operated as a normally open or alternately as a normally closed switch merely by orienting support members for the wiping contacts in a first direction or in a 180 inverted direction, with respect to a support brace on the actuator.
  • the spring contacts are shaped so they provide wiping action with the stationary contacts when the switch is actuated.
  • each switching station consists of two upwardly extending, relatively rigid contact-carrying leads which are secured in channels formed in the switch housing.
  • the same spring contact member may be employed both for the normally open and the normally closed switch configurations, with the contact member merely being changed from one alignment to a 180 inverted alignment to achieve the other type of switching action.
  • FIG. 1 is a cross-sectional view of a switch constructed in accordance with the present invention in which the actuator is not depressed;
  • FIG. 2 is an end view of the switch with the outline of the actuator being shown by dotted lines;
  • FIG. 3 is a partial cross-sectional view of the switch in which the actuator is depressed
  • FIG. 4 is a front view of a movable spring contact
  • FIG. 5 is a front view of the plastic actuator of the switch.
  • FIG. 6 is an end view of the plastic actuator of the switch.
  • the interior of the switch 10 of this invention, with the actuator not depressed, is shown in the crosssectional view of FIG. 1.
  • the two stage switch of FIG. I has a normally open station 6 and a normally closed station 8, it being understood that the switch could have any number of switching stations merely by extending the structure in accordance with the disclosure made herein.
  • the housing 12 for the switch 10 has a generally rectangular box-like shape which is preferably formed of plastics. Integrally formed blocks 16, 18 and 20 extend upwardly from the bottom 14 of the housing 12.
  • a first channel 22 is provided between the block 16 and the lefthand sidewall 24 of the housing 12.
  • a second channel 26 is provided between the blocks 16 and 18, and a third channel 28 is provided between the blocks 18 and 20.
  • a fourth channel 30 is provided between the block 20 and the righthand sidewall 32 of the housing 12.
  • the normally open station 6 is defined by a pair of relatively rigid leads 34 and 36 which are secured into the channels 22 and 26, respectively.
  • a normally closed station 8 is defined by a second pair of relatively rigid contact leads 40 and 42 which are secured into the channels 28 and 30, respectively.
  • the leads 34 and 36 carry the contacts 44 and 46, respectively, while the leads 40 and 42 carry the contacts 50 and 52, respectively.
  • the leads 34, 36, 40 and 42 have preferably bent sections 60 which allow a portion of the lead to abut against corresponding horizontal surfaces 62 on the outer blocks 16 and 20, to provide for increased terminal pull strength should the leads be pulled from the bottom of the switch housing 10.
  • the lower ends of the leads 34, 36, 40 and 42 extend through the bottom 14 of the housing 12 to receive electrical connection leads (not shown), while the upper ends of these leads preferably abut against the lower surface 69 of the top wall 67 for increased support.
  • a one-piece actuator 64 which is best shown in FIGS. 5 and 6, is employed which is preferably molded of plastics.
  • a manual push button 66 is integrally formed on the actuator 64 and extends upwardly through the opening 65 in the top wall 67 of the housing 12.
  • the actuator 64 is formed with a spring retainer 68 that consists of a pair of downwardly extending legs 70 and 72.
  • Two recesses, 73 and 74 are formed atthe upper ends of the legs 70 and 72 with a curved projection 76 extending therebetween.
  • the recesses 73 and 74 receive the upper end of a return spring that is utilized to return the actuator 64 to its undepressed position upon release of pressure on the button 66.
  • the center block 18 of the housing 12 has a recess 82 which receives the lower end of the spring 80 so that it bottoms against the surface 84 of the recess 82.
  • the actuator 64 is formed with a relatively thin brace 86 of a generally rectangular cross-sectional shape, which is preferably integrally formed with the actuator 64.
  • the contact support members 88 and 90 are preferably integrally formed on the brace 86 and the metal movable spring contacts 92 and 94 are held on support members 88 and 90, respectively, by their natural resiliency.
  • FIG. 1 shows the switch when the actuator 64 is not depressed
  • FIG. 3 shows the switch when the actuator is depressed.
  • the movable contact 92 of station 6 does not engage the stationary contacts 44 and 46, but the movable contact 90 of station 8 is in contact with the stationary contacts 50 and 52.
  • the contact 92 has two generally .l-shaped resilient sections 106 and 108, the long segments 115 and 117 of which are spaced from associated adjacent portions of the bifurcated arms 110 and 112 of the support member 88 when the actuator 64 is not depressed.
  • the contacts 92 and 94 have a thin, flat shape and are preferably formed of a beryllium-copper alloy, with the grain running in the vertical direction, as indicated in FIG. 4. As shown in FIG. 4, the thickness of the edges 114 of the contacts 92 and 94 is much less than is the width of these contacts which correspond substantially to the width of the sidewall 116 of their respective support members, shown in FIG. 6.
  • the J-shaped sections 115 and 117 of the contact 92 face each other and diverge outwardly at an acute angle from the generally U-shaped connecting section 109. Outer areas of each of the J-shaped sections 115 and 117, respectively, engage the ends of bifurcated arms 110 and 112 at the upper end of the support member 88 so that the external outer ends of the sections 106 and 108 extend adjacent the inner sides of the bifurcated arms 110 and 112, thereby helping to hold the contact 92 in place during operation of the switch.
  • the segments 115 and 117 (shown in FIG. 4) are spaced from the arms 110 and 112 when switching station 6 is open; and they are forced towards, and preferably into engagement with, the sides of the arms 110 and 112 when switching station 6 is closed.
  • the U-shaped connecting section 109 is received on the lower end of the support member 88 and is held in place by the resiliency of the contact 92.
  • the actuator 64 moves downwardly against the force of the return spring 80, thereby bringing the J- shaped sections 115 and 117 of movable contact 92 into contact with the stationary contacts 44 and 46, respectively, so as to close the circuit between the leads 34 and 36.
  • the sections 115 and 117 wipe against the contacts 44 and 46 due to the pressure exerted by contact section 115 on the contact 44 and by pressure exerted by contact section 117 on the contact 46 which results from the natural resiliency of the contact 92. In this manner, a switch having high contact pressure, very low contact bounce and contact wiping action is provided.
  • the normally closed switching station 8 functions in a similar manner to the operation of the normally open switching station 6 except that this station is initially closed and then opened.
  • the generally J-shaped resilient sections 118 and 120 of contact 94 are initially pressed into contact with the stationary contacts 50 and 52, respectively, as shown in FIG. 1.
  • the J-shaped sections 118 and 120 of the contact 94 which face each other and which diverge outwardly at an acute angle from the generally U-shaped connecting section 122, engage the bifurcated arms 124 and 126 at the lower end of the support member 90.
  • the support member 90 is aligned in a 180 inverted direction from the alignment of the support member 88.
  • the actuator button is depressed and then released, the sections 118 and 120 wipe against the contacts 50 and 52, respectively, thereby providing the desired wiping action for the normally closed switching station 8.
  • An electrical switch comprising a housing, a switching station comprising a pair of electrically conductive leads each having a stationary contact means thereon, an actuator movable in said housing between first and second positions and having a contact support member associated with said pair of leads, resilient means for biasing said actuator towards its first position and'a movable electrical contact means supported by said support member, said movable contact means having first and second resilient contact sections that are joined by a connecting section, and said first and said second contact sections having segments which are spaced from an adjacent portion of their respective support member when the electrical circuit between said pair of leads is open and which are deflected towards said adjacent portion of said support member by said stationary contact means when said electrical circuit is closed so as to provide a wiping action between said movable and said stationary contact means
  • said movable contact means further having a generally U- shaped connection section and a pair of generally J- shaped sections which face each other and which diverge outwardly from said U-shaped section at an acute angle, and said support member being constructed to receive said U-shaped connecting section
  • said resilient means is a coiled spring and said actuator is constructed of a single piece of plastic which has said support member formed thereon and which comprises a spring retainer for receiving one end of said coiled spring and a support brace for supporting said support member.

Landscapes

  • Push-Button Switches (AREA)
  • Contacts (AREA)
US416489A 1973-11-16 1973-11-16 Electrical switch having movable spring contacts which provide wiping action with associated stationary contacts Expired - Lifetime US3860775A (en)

Priority Applications (11)

Application Number Priority Date Filing Date Title
US416489A US3860775A (en) 1973-11-16 1973-11-16 Electrical switch having movable spring contacts which provide wiping action with associated stationary contacts
CA212,634A CA1004716A (en) 1973-11-16 1974-10-30 Electrical switch having movable spring contacts which provide wiping action with associate stationary contacts
AU75127/74A AU470522B2 (en) 1973-11-16 1974-11-07 Electrical switch having movable spring contacts which provude wiping action with associated stationary contacts
GB48752/74A GB1482423A (en) 1973-11-16 1974-11-11 Electrical switches
BR9558/74A BR7409558A (pt) 1973-11-16 1974-11-14 Chave eletrica
FR7437744A FR2251902B1 (enrdf_load_stackoverflow) 1973-11-16 1974-11-15
NL7414938A NL7414938A (nl) 1973-11-16 1974-11-15 Schakelaar.
IT29478/74A IT1025732B (it) 1973-11-16 1974-11-15 Interruttore elettrico avente contatti elastici mobili che compiono un azione di strofinamento su contatti fissi ad essi asso ciati
JP13123474A JPS5731604B2 (enrdf_load_stackoverflow) 1973-11-16 1974-11-15
DE19742454388 DE2454388C3 (de) 1973-11-16 1974-11-16 Elektrischer druckknopfschalter
US54525675 USRE28555E (en) 1973-11-16 1975-01-29 Electrical switch having movable spring contacts which provide wiping action with associated stationary contacts

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US416489A US3860775A (en) 1973-11-16 1973-11-16 Electrical switch having movable spring contacts which provide wiping action with associated stationary contacts

Publications (1)

Publication Number Publication Date
US3860775A true US3860775A (en) 1975-01-14

Family

ID=23650185

Family Applications (1)

Application Number Title Priority Date Filing Date
US416489A Expired - Lifetime US3860775A (en) 1973-11-16 1973-11-16 Electrical switch having movable spring contacts which provide wiping action with associated stationary contacts

Country Status (9)

Country Link
US (1) US3860775A (enrdf_load_stackoverflow)
JP (1) JPS5731604B2 (enrdf_load_stackoverflow)
BR (1) BR7409558A (enrdf_load_stackoverflow)
CA (1) CA1004716A (enrdf_load_stackoverflow)
DE (1) DE2454388C3 (enrdf_load_stackoverflow)
FR (1) FR2251902B1 (enrdf_load_stackoverflow)
GB (1) GB1482423A (enrdf_load_stackoverflow)
IT (1) IT1025732B (enrdf_load_stackoverflow)
NL (1) NL7414938A (enrdf_load_stackoverflow)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4001526A (en) * 1974-07-12 1977-01-04 Molex Incorporated Alternate action switch
FR2497397A1 (fr) * 1980-12-30 1982-07-02 Cavis Cavetti Isolati Spa Interrupteur miniaturise a poussoir, pourvu de contacts glissants, notamment pour installations electriques de vehicules
US5047603A (en) * 1988-06-27 1991-09-10 Cge Compagnia Generale Elettromeccanica S.P.A. Electrical contact structures specifically suited for low power circuits
US5221816A (en) * 1991-09-09 1993-06-22 Delta Systems, Inc. Plunger switch
US6483061B1 (en) * 2001-09-21 2002-11-19 Delta Systems, Inc. Triple pole safety switch and connector

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3110971C2 (de) * 1981-03-20 1985-08-14 Franz Kirsten Elektrotechnische Spezialfabrik, 6530 Bingen Elektrischer Kontaktschalter

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1859981A (en) * 1930-10-08 1932-05-24 Delco Remy Corp Switch
US1956361A (en) * 1933-07-24 1934-04-24 Gen Motors Corp Switch
US2521561A (en) * 1948-02-17 1950-09-05 Ark Les Switch Corp Electric switch of the push-and-pull type
US3017476A (en) * 1959-06-02 1962-01-16 Tru Fit Screw Products Corp Switch
US3061692A (en) * 1956-10-04 1962-10-30 Ncr Co Multiple-point switches
US3621157A (en) * 1969-02-18 1971-11-16 Mc Graw Edison Co Miniature switch with multiple cam-operated switch contacts

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4724573U (enrdf_load_stackoverflow) * 1971-04-09 1972-11-18

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1859981A (en) * 1930-10-08 1932-05-24 Delco Remy Corp Switch
US1956361A (en) * 1933-07-24 1934-04-24 Gen Motors Corp Switch
US2521561A (en) * 1948-02-17 1950-09-05 Ark Les Switch Corp Electric switch of the push-and-pull type
US3061692A (en) * 1956-10-04 1962-10-30 Ncr Co Multiple-point switches
US3017476A (en) * 1959-06-02 1962-01-16 Tru Fit Screw Products Corp Switch
US3621157A (en) * 1969-02-18 1971-11-16 Mc Graw Edison Co Miniature switch with multiple cam-operated switch contacts

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4001526A (en) * 1974-07-12 1977-01-04 Molex Incorporated Alternate action switch
FR2497397A1 (fr) * 1980-12-30 1982-07-02 Cavis Cavetti Isolati Spa Interrupteur miniaturise a poussoir, pourvu de contacts glissants, notamment pour installations electriques de vehicules
US5047603A (en) * 1988-06-27 1991-09-10 Cge Compagnia Generale Elettromeccanica S.P.A. Electrical contact structures specifically suited for low power circuits
US5221816A (en) * 1991-09-09 1993-06-22 Delta Systems, Inc. Plunger switch
US5528007A (en) * 1991-09-09 1996-06-18 Delta Systems, Inc. Plunger switch and method of manufacture
US6483061B1 (en) * 2001-09-21 2002-11-19 Delta Systems, Inc. Triple pole safety switch and connector

Also Published As

Publication number Publication date
GB1482423A (en) 1977-08-10
DE2454388B2 (de) 1977-06-16
IT1025732B (it) 1978-08-30
JPS5731604B2 (enrdf_load_stackoverflow) 1982-07-06
NL7414938A (nl) 1975-05-21
CA1004716A (en) 1977-02-01
AU7512774A (en) 1976-03-18
JPS50112770A (enrdf_load_stackoverflow) 1975-09-04
FR2251902B1 (enrdf_load_stackoverflow) 1980-06-20
DE2454388A1 (de) 1975-05-28
DE2454388C3 (de) 1978-02-02
BR7409558A (pt) 1976-05-25
FR2251902A1 (enrdf_load_stackoverflow) 1975-06-13

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