US3835276A - Electric switches - Google Patents

Electric switches Download PDF

Info

Publication number
US3835276A
US3835276A US00324795A US32479573A US3835276A US 3835276 A US3835276 A US 3835276A US 00324795 A US00324795 A US 00324795A US 32479573 A US32479573 A US 32479573A US 3835276 A US3835276 A US 3835276A
Authority
US
United States
Prior art keywords
button
push
contact
switch
switch contact
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
US00324795A
Other languages
English (en)
Inventor
J Field
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.)
Plessey Overseas Ltd
Original Assignee
Plessey Handel und Investments AG
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 Plessey Handel und Investments AG filed Critical Plessey Handel und Investments AG
Application granted granted Critical
Publication of US3835276A publication Critical patent/US3835276A/en
Assigned to PLESSEY OVERSEAS LIMITED reassignment PLESSEY OVERSEAS LIMITED ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: PLESSEY HANDEL UND INVESTMENTS AG, GARTENSTRASSE 2, ZUG, SWITZERLAND
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H15/00—Switches having rectilinearly-movable operating part or parts adapted for actuation in opposite directions, e.g. slide switch
    • H01H15/02—Details
    • H01H15/06—Movable parts; Contacts mounted thereon
    • H01H15/10—Operating parts
    • H01H15/102—Operating parts comprising cam devices
    • 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
    • H01H13/506—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 with a make-break action in a single operation

Definitions

  • a push-button switch comprises a springy wire which constitutes a switch contact and is so shaped and arranged that in response to the depressionof the push- -button which is spring-biased a cam deflects the switch contact whereby the contact makes momentary contact with another switch contact to provide contacts closure. Thereafter during the depression of the push-button the first mentioned switch contact disengages from the other wire contact and the cam is shapedso that as the push-button restores to its unoperated position under the action of its biasing spring the springy wire switch contact is deflected without the momentary switching action being repeated.
  • This invention relates to electric switches of the push-button type and relates more specifically to such switches which provide a momentary switching action during the operation thereof and which may be advantageously employed in electronic keyboards affording so-called key rollover facilities.
  • the present invention provides a simple and relatively inexpensive push-button switch comprising at least one springy wire which constitutes a switch contact and which is so shaped and arranged that in response to the depression of the push-button which is spring-biased a cam deflects said switch contact whereby the latter makes momentary contact with or disengages from another switch contact to effect contacts closure or contacts opening and thereafter during the depression of the push-button the first switch contact is allowed to restore to its former position thereby disengaging from or engaging with said another contact the cam being shaped so that as the pushbutton restores to its unoperated position under the action of its biasing spring the springy wire switch contact is deflected without the momentary switching action being repeated.
  • both of the switch contacts are of springy wire in which case the contacts can be of identical size and shape.
  • the spring may be provided with a deformation which is engaged by the cam as the push-button is depressed.
  • the cam may be formed integrally with the push-button.
  • FIGS. la, to 1d show cross-sectional views of a pushbutton keyswitch according to the invention in the unactuated and actuated stages;
  • FIGS. 2a to 2d show cross-sectional views corresponding to those of FIGS. la and 1d but taken along lines at right-angles thereto.
  • a push-button keyswitch according to the present invention comprises an insulated push-button, part of which is shown at 1, which is biased upwards by means of a coiled depression spring 2.
  • the push-button is shown in its normal unoperated position in FIGS. la and 2a.
  • the switch has two cantilever contacts which consist of springy wires 3 and 4 conveniently sealed through a base member 5 of the switch and biased to the right as viewed in FIG. 2a.
  • the wire contacts 3 and 4 are deformed-at 6 and 7 so that as the-push-button is depressed against the action of spring 2 cam surfaces 8 and 9 engage the deformities 6 and 7 and the wire contacts 3 and 4 are defelcted into contact with each other to effect contacts closure as shown in FIG. lb.
  • FIGS. 2a and 2d it will be seen that the top end parts of the respective wire contacts 3 and 4 are bent at an angle to the main parts of the appertaining contacts so that electrical contact is made in the FIG.
  • the switch provides a momentary make contact action during the depression of the push-button.
  • the pushbutton When however the pushbutton is released it restores upwards under the action of spring 2 as shown in FIG. 1d towards the position shown in FIG. la.
  • the wire contacts are deflected as shown in FIG. 2d slide around the cam without the contacts closing during return of the switch to the condition shown in FIG. la.
  • a push-button electric switch comprising a pair of identical springy wire co-operating switch contact members having deformed parts which in response to the depression of the push-button which is springbiased are deflected simultaneously by cam means on said button for causing momentary contact make or momentary contact break and for permitting the pushbutton to restore to its unoperated position under the action of its biasing spring without causing said momentary switching action to be repeated.

Landscapes

  • Push-Button Switches (AREA)
US00324795A 1972-01-19 1973-01-18 Electric switches Expired - Lifetime US3835276A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB268472 1972-01-19

Publications (1)

Publication Number Publication Date
US3835276A true US3835276A (en) 1974-09-10

Family

ID=9743969

Family Applications (1)

Application Number Title Priority Date Filing Date
US00324795A Expired - Lifetime US3835276A (en) 1972-01-19 1973-01-18 Electric switches

Country Status (5)

Country Link
US (1) US3835276A (it)
DE (1) DE2302646A1 (it)
FR (1) FR2168467A1 (it)
IT (1) IT976919B (it)
SE (1) SE378702B (it)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3924090A (en) * 1974-09-16 1975-12-02 Data Electronics Corp Switch assembly with reciprocating cams
US4090053A (en) * 1974-10-30 1978-05-16 Anton Schaumann Spring contact switch assembly
US4385219A (en) * 1980-07-08 1983-05-24 U.S. Philips Corporation Push button switch
US4388503A (en) * 1981-08-14 1983-06-14 Square D Company Multiple position pushbutton switch
US4650943A (en) * 1981-08-05 1987-03-17 Itt Industries, Inc. Slide switch
US4658101A (en) * 1985-02-28 1987-04-14 Teikoku Tsushin Kogyo Co., Ltd. Sliding-type dip switch
WO2011101086A1 (de) * 2010-02-16 2011-08-25 Autoliv Development Ab Hupenaktivierungseinrichtung

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE546001A (it) * 1955-03-12 1956-03-31
US3153130A (en) * 1961-06-07 1964-10-13 Bell Telephone Labor Inc Momentary contact switch
DE1901469A1 (de) * 1969-01-14 1970-08-27 Standard Elek K Lorenz Ag Federnde Taste

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE546001A (it) * 1955-03-12 1956-03-31
US3153130A (en) * 1961-06-07 1964-10-13 Bell Telephone Labor Inc Momentary contact switch
DE1901469A1 (de) * 1969-01-14 1970-08-27 Standard Elek K Lorenz Ag Federnde Taste

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3924090A (en) * 1974-09-16 1975-12-02 Data Electronics Corp Switch assembly with reciprocating cams
US4090053A (en) * 1974-10-30 1978-05-16 Anton Schaumann Spring contact switch assembly
US4385219A (en) * 1980-07-08 1983-05-24 U.S. Philips Corporation Push button switch
US4650943A (en) * 1981-08-05 1987-03-17 Itt Industries, Inc. Slide switch
US4388503A (en) * 1981-08-14 1983-06-14 Square D Company Multiple position pushbutton switch
US4658101A (en) * 1985-02-28 1987-04-14 Teikoku Tsushin Kogyo Co., Ltd. Sliding-type dip switch
WO2011101086A1 (de) * 2010-02-16 2011-08-25 Autoliv Development Ab Hupenaktivierungseinrichtung

Also Published As

Publication number Publication date
IT976919B (it) 1974-09-10
FR2168467A1 (it) 1973-08-31
DE2302646A1 (de) 1973-07-26
SE378702B (it) 1975-09-08

Similar Documents

Publication Publication Date Title
US3800104A (en) Low profile keyboard switch assembly with snap action cantilever contact
US3902032A (en) Electrical switch with improved contact structure
US3590195A (en) Oilcan pushbutton switch
US3448419A (en) Weatherproof pushbutton key set employing sealed contacts operated by a permanent magnet
US3818153A (en) Pushbutton switch assembly for keyboards including a bridging conductive, elastomeric diaphragm type contact
US3928741A (en) Momentary contact single pole switch
US4197437A (en) Snap-action switch
US3835276A (en) Electric switches
US2750463A (en) Electric switches of the snap-action type
US3920943A (en) Electrical switch
GB1369897A (en) Push-button switch
US3809834A (en) Snap switch construction and snap blade therefor or the like
US3819882A (en) Matrix keyboard assembly
GB1291241A (en) Electrical switches
US3809839A (en) Momentary switch with serpentine movable and coil spring stationary contacts
US3476890A (en) Switch
US3838237A (en) Light load type push button switch
US3371179A (en) Electrical switch having a floating actuator which is detented into various circuit controlling positions by a leaf spring contact
GB926005A (en) Improvements in electrical make-and-break switches
US3519772A (en) Snap-action electric switch
GB1267923A (en) Electrical switch assemblies
US3860775A (en) Electrical switch having movable spring contacts which provide wiping action with associated stationary contacts
US3564185A (en) Electrical switch construction with shield
US4144419A (en) Push-button actuated slide switch
US3811024A (en) Momentary contact, non-bounce switch