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US3731030A - Pushbutton switch assembly with pivotable conductive bridging member and multiple conductive path printed circuit board - Google Patents

Pushbutton switch assembly with pivotable conductive bridging member and multiple conductive path printed circuit board Download PDF

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Publication number
US3731030A
US3731030A US00152163A US3731030DA US3731030A US 3731030 A US3731030 A US 3731030A US 00152163 A US00152163 A US 00152163A US 3731030D A US3731030D A US 3731030DA US 3731030 A US3731030 A US 3731030A
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Prior art keywords
push
contact
housing
button
contact bridge
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Expired - Lifetime
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US00152163A
Inventor
W Holzer
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Holzer Patent AG
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Holzer Patent AG
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    • 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
    • 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
    • H01H1/40—Contact mounted so that its contact-making surface is flush with adjoining insulation
    • H01H1/403—Contacts forming part of a printed circuit
    • 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
    • H01H13/56—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 the contact returning to its original state upon the next application of operating force
    • H01H13/60—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 the contact returning to its original state upon the next application of operating force with contact-driving member moved alternately in opposite directions
    • 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
    • H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard

Definitions

  • Each push-button switch is mounted within the housing by a spring which biases the switch in an upward direction and includes a spring engaging a contact piece so that depression of the push-button switch causes the contact piece to rock on a bearing element in contact with a conductive path of the printed circuit board.
  • a spring mounted between the housing and a portion of the contact bridge biases the contact bridge in a first position where a conductive path is formed by the contact bridge between the conductive bearing element and one contact on the bridge and movement of the contact bridge by depression of the push-button switch causes a new conductive path to be formed between another portion of the contact bridge, the conductive bearing element and another contact on the contact bridge.
  • the invention relates to in series attachable push- 5 button switches with power contacts and their use on printed circuit boards.
  • Push-button switches of the initially mentioned type already have been known. In the case of these known switching arrangements, however, every individual switch must be completely equipped and assembled by itself. Such switches naturally are very costly and expensive. Both the fixed contacts and the contact bridges must be separately attached in the housing or on the push-button slide, prior to the assembly of every individual switch.
  • the object of the invention to create a push-button switch of the initially mentioned type, where the drawbacks of known devices will be avoided and with which it will be possible to assemble anumber of individual switches very simply and at favorable cost in a switching aggregate. It should be possible furthermore to produce the contact bridge and fixed contact pieces if possible in only one work step.
  • the entire switch is to be structured as fiat as possible.
  • the object of the invention also is to provide a switch usable for electric devices where the printed circuit boards are built in; in this case the switch is to be capable of cooperating with the same printed circuit board of the electric device, so that additional electric connections will become superfluous. Besides, a jamming of the push buttons is to be made impossible.
  • a printed circuit board constitutes the lid of the contact housing and in that parts of the conductor paths serve as fixed contact pieces on which a contact bridge, which is underv spring tension, has been mounted and which on its part can be moved into the intended switching positions by operation of the pushbutton slide.
  • a compression spring fixed in the push-button slide, will move the contact bridge, when the push-button slide is pushed, into a switching position corresponding to the depressed switching state.
  • a guide piece will center the push-button switch.
  • the contact bridge is made of flat metal material.
  • a further development of the invention provides that the contact bridge be guided by the push-button slide.
  • a rib member represents an additional guidance structure, for the contact bridge.
  • the parts of the printed circuit boards serving as fixed contact pieces are reinforced by means of rivets.
  • FIG. I shows several push-button switches integrated in a push-button aggregate
  • FIG. 2 shows a longitudinal section through a push button
  • FIG. 3 shows a cross section through the push button, from which the guidance of the contact bridge by the push-button slide becomes clear.
  • An individual bush button (FIG. 2) consists essentially of a push-button slide bar 5, a push-button head 1, 2 as well as a contact bridge 15.
  • Contact bridge 15 connects various fixed contacts with each other, which are formed by conductor paths 6.
  • Conductor paths 6 are formed'on a printed circuit board 7.
  • contact bridge 15 is supported by a fixed contact by means of a bearing element 16 and because of its rocking operation contact bridge 15 can contact various conductor paths.
  • the fixed contacts are made up by conductor paths 6. These fixed contacts also can be reinforced additionally by means of rivets. Conductor paths 6 can be integral with a printed circuit, as becomes clear from FIG. 1.
  • Printed circuit board 7 represents the cover of the push button, with which the latter is closed. At the same time, however, printed circuit board 7 can be'the cover of an additional electric switching device, for example, of a programmed switching mechanism. In that case conductor paths 6 also can constitute fixed contacts of the switching device, or else additional conductor paths may be attached to the underside of printed circuit board 7, which then can be connected in a manner known per se with conductor paths 6, which have been shown.
  • buttons can be attached in series in one push-button aggregate.
  • the individual push buttons are attached by means of a projection 13 to printed circuit board 7 via screws or rivets or proper spring clips.
  • Push-button heads 1, 2 are guided in guide piece 3 and they may have either a rectangular or square shape (push-button head 1) or they may be round (push-button head 2).
  • Guide piece 3 either can be slipped on the housing 4 or it may be an integrated constituent part of said housing.
  • Contact bridge 15 is guided with the aid of push-button slide 5 (FIG. 3).
  • pushbutton slide 5 effectively will have projections 14.
  • Ribs 18 can be used additionally for this lateral guidance of contact bridge 15. To carry out the guidance of the contact bridge altogether with ribs 18 instead of only with slide 5 also is possible.
  • Push-button switch apparatus comprising:
  • said means including at least one push-button slide;
  • a compression spring mounted between said at least one push-button slide and an associated one of said at least one contact bridge for moving said contact bridge upon depression of said push-button slide; and an additional compression spring mounted between said at least one push-button slide and said housing for biasing an upper portion of said push-button slide above an upper surface of said housing.
  • Push-button switch apparatus as in claim 1 wherein said at least one contact bridge consists of a flat metal strip and further comprising means mounted within said housing for guiding said push-button slide therein.
  • Push-button switch apparatus as in claim 2 further comprising means mounted within said housing for preventing lateral movement of said at least one contact bridge.
  • Push-button switch apparatus as in claim 2 wherein said at least one push-button slide includes a bifurcated bottom portion, said flat metal strip is inserted within the ends of said bifurcated portion and said compression spring is mounted within the lower portion of said ,push-buttonslide between an internal shoulder thereof and said flat metal strip.
  • Pushbutton switch apparatus as in claim 1 wherein said contact housing comprises a number of contact housing elements and a number of contact bridges each mounted within a respectivecontact housing element, and each of said contact housing elements including a push-button slide.

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  • Push-Button Switches (AREA)
  • Slide Switches (AREA)
  • Switch Cases, Indication, And Locking (AREA)

Abstract

A plurality of push-button switches mounted in a housing having a printed circuit board with conductive paths thereon as a base. Each push-button switch is mounted within the housing by a spring which biases the switch in an upward direction and includes a spring engaging a contact piece so that depression of the pushbutton switch causes the contact piece to rock on a bearing element in contact with a conductive path of the printed circuit board. A spring mounted between the housing and a portion of the contact bridge biases the contact bridge in a first position where a conductive path is formed by the contact bridge between the conductive bearing element and one contact on the bridge and movement of the contact bridge by depression of the push-button switch causes a new conductive path to be formed between another portion of the contact bridge, the conductive bearing element and another contact on the contact bridge.

Description

United States Patent [191 Holzer PUSHBUTTON SWITCH ASSEMBLY WITH PIVOTABLE CONDUCTIVE BRIDGING MEMBER AND MULTIPLE CONDUCTIVE PATH PRINTED CIRCUIT BOARD [75] Inventor:
many
[73] Assignee: Holzer Patent AG, Zug, Switzerland [22] Filed: June 11,1971
[21] Appl. No.: 152,163
[30] Foreign Application Priority Data UNITED STATES PATENTS 3,594,523 7/1971 Frenzel ..200/157 Walter K. Holzer, Meersburg, Ger- [111 3,73Ifi3 [451 May 1, 1973 3,415,966 12/1968 Matthews ..200/157 X 3,531,603 9/1970 Ashman ..200/166 PC UX 3,539,749 1 l/l970 MacPheat ..200/159 R Primary Examirter-J. R. Scott Att0rneyl Watson, Cole, Grindle & Watson [5 7] ABSTRACT A plurality of push-button switches mounted in a housing having a printed circuit board with conductive paths thereon as a base. Each push-button switch is mounted within the housing by a spring which biases the switch in an upward direction and includes a spring engaging a contact piece so that depression of the push-button switch causes the contact piece to rock on a bearing element in contact with a conductive path of the printed circuit board. A spring mounted between the housing and a portion of the contact bridge biases the contact bridge in a first position where a conductive path is formed by the contact bridge between the conductive bearing element and one contact on the bridge and movement of the contact bridge by depression of the push-button switch causes a new conductive path to be formed between another portion of the contact bridge, the conductive bearing element and another contact on the contact bridge.
5 Claims, 3 Drawing Figures 'lllllllla Patented May 1, 1973- 3,731,030
VII
INVENTORI v 'ATfO/YMEY Y PUSHBUTTON SWITCH ASSEMBLY WITH PIVOTABLE CONDUCTIVE BRIDGING MEMBER AND MULTIPLE CONDUCTIVE PATH PRINTED CIRCUIT BOARD The invention relates to in series attachable push- 5 button switches with power contacts and their use on printed circuit boards.
Push-button switches of the initially mentioned type already have been known. In the case of these known switching arrangements, however, every individual switch must be completely equipped and assembled by itself. Such switches naturally are very costly and expensive. Both the fixed contacts and the contact bridges must be separately attached in the housing or on the push-button slide, prior to the assembly of every individual switch.
It is the object of the invention to create a push-button switch of the initially mentioned type, where the drawbacks of known devices will be avoided and with which it will be possible to assemble anumber of individual switches very simply and at favorable cost in a switching aggregate. It should be possible furthermore to produce the contact bridge and fixed contact pieces if possible in only one work step. The entire switch is to be structured as fiat as possible. Beyond that, the object of the invention also is to provide a switch usable for electric devices where the printed circuit boards are built in; in this case the switch is to be capable of cooperating with the same printed circuit board of the electric device, so that additional electric connections will become superfluous. Besides, a jamming of the push buttons is to be made impossible.
The previously mentioned objects are achieved in that a printed circuit board constitutes the lid of the contact housing and in that parts of the conductor paths serve as fixed contact pieces on which a contact bridge, which is underv spring tension, has been mounted and which on its part can be moved into the intended switching positions by operation of the pushbutton slide.
According to one embodiment of the invention a compression spring, fixed in the push-button slide, will move the contact bridge, when the push-button slide is pushed, into a switching position corresponding to the depressed switching state.
According to a further development of the invention, a guide piece will center the push-button switch.
According to an effective development of the invention, the contact bridge is made of flat metal material.
A further development of the invention provides that the contact bridge be guided by the push-button slide.
According to a further development of the invention, a rib member represents an additional guidance structure, for the contact bridge.
According to another development of the invention, the parts of the printed circuit boards serving as fixed contact pieces are reinforced by means of rivets.
The invention will be explained on the basis of an embodiment presented by way of example and with the aid ofa drawing.
In the drawing:
FIG. I shows several push-button switches integrated in a push-button aggregate;
FIG. 2 shows a longitudinal section through a push button; and
FIG. 3 shows a cross section through the push button, from which the guidance of the contact bridge by the push-button slide becomes clear.
An individual bush button (FIG. 2) consists essentially of a push-button slide bar 5, a push-button head 1, 2 as well as a contact bridge 15. Contact bridge 15 connects various fixed contacts with each other, which are formed by conductor paths 6. Conductor paths 6 are formed'on a printed circuit board 7. At its fulcrum, contact bridge 15 is supported by a fixed contact by means of a bearing element 16 and because of its rocking operation contact bridge 15 can contact various conductor paths. A compression spring 8, which is supported by housing 4 of the push button, holds contact bridge 15 in the position shown in FIG. 2, whenever the push button is not depressed. In this switching state, push-button slide 5 is held in the position shown with the help of an additional compression spring 17,
which is supported by guide element 3.
With respect to operation of the push-button switch, pushbutton head 1, 2 and thus slide 5 are moved in the direction toward printed circuit board 7, and resulting in that contact bridge 15 is tipped over, and the contact which had been closed before is opened and the contact which had been opened before is closed. The operation of contact bridge 15 is accomplished by the fact that, upon depression .of push-button head 1, 2, compression spring 9 is moved with the aid of slide 5 to such a point in the direction toward printed circuit board 7 that compression spring 9 will press against contact bridge 15 and will move the latter. In the position shown in FIG. 2, compression spring 9 does not yet touch contact bridge 15, so that it would assure a definite switching position when the push-button switch has not been depressed. When releasing pushbutton head I, 2, the push button again will return to its original position because of the power of compression spring 17. v
The fixed contacts are made up by conductor paths 6. These fixed contacts also can be reinforced additionally by means of rivets. Conductor paths 6 can be integral with a printed circuit, as becomes clear from FIG. 1. Printed circuit board 7 represents the cover of the push button, with which the latter is closed. At the same time, however, printed circuit board 7 can be'the cover of an additional electric switching device, for example, of a programmed switching mechanism. In that case conductor paths 6 also can constitute fixed contacts of the switching device, or else additional conductor paths may be attached to the underside of printed circuit board 7, which then can be connected in a manner known per se with conductor paths 6, which have been shown.
As can be seen further in FIG. 1, several individual push buttons can be attached in series in one push-button aggregate. The individual push buttons are attached by means of a projection 13 to printed circuit board 7 via screws or rivets or proper spring clips.
Push-button heads 1, 2 are guided in guide piece 3 and they may have either a rectangular or square shape (push-button head 1) or they may be round (push-button head 2). Guide piece 3 either can be slipped on the housing 4 or it may be an integrated constituent part of said housing. Contact bridge 15 is guided with the aid of push-button slide 5 (FIG. 3). For this purpose pushbutton slide 5 effectively will have projections 14. Ribs 18 can be used additionally for this lateral guidance of contact bridge 15. To carry out the guidance of the contact bridge altogether with ribs 18 instead of only with slide 5 also is possible.
In the rest position of the push button, a shoulder 12 of push-button slide 5 abuts against an attachment 11 of housing 4 (FIG. 2). The stop arrangement is not described any further for the purposes of this invention as such stop arrangements are well known and in the case of the present push-button switch all such known stop arrangements can be used.
In the case of a particularly heavy load on conductor paths 6 at the places of contact, it is possible to protect these places of the conductor paths by an additional metal surface, for example, with silver. But the invention also is advantageous in that the additional metal coating at the point of contact with bearing element 16 is not absolutely necessary, because of the relative motion therebetween and therefore a harmful oxide layer can hardly develop.
In the assembly of the object of the application, first all necessary parts are inserted in housing 4. As soon as this has been accomplished, printed circuit board 7 is merely put on top, as a result of which the push button is locked and mounted and the fixed contacts will be attached at the same time. This results in a particularly inexpensive fabrication since all individual parts merely have to be inserted in a single operational step. Furthermore, in the case of the object of the application vis-a-vis the status of the prior art, it advantageously will result in a very flat construction. Beyond that, it will be of advantage that printed circuit board 7 can be atthe same time a constituent part of another electrical device, for example, a programmed switching device. Jamming of push-button heads 1, 2 or push-button slide 5, which occurs in the case of the assembly of otherwise traditional push-button switches, is impossible in the case of the object of the application because of the use of special guide piece 3.
What is claimed is:
l. Push-button switch apparatus, comprising:
a contact housing;
a printed circuit board having thereon conductive paths and forming the base of said contact housmg;
at least one contact bridge to remove said one contact from said conductive path and establish engagement of the other of said spaced contacts with another of said conductive paths, said means including at least one push-button slide;
a compression spring mounted between said at least one push-button slide and an associated one of said at least one contact bridge for moving said contact bridge upon depression of said push-button slide; and an additional compression spring mounted between said at least one push-button slide and said housing for biasing an upper portion of said push-button slide above an upper surface of said housing.
2. Push-button switch apparatus as in claim 1 wherein said at least one contact bridge consists of a flat metal strip and further comprising means mounted within said housing for guiding said push-button slide therein.
3. Push-button switch apparatus as in claim 2 further comprising means mounted within said housing for preventing lateral movement of said at least one contact bridge.
4. Push-button switch apparatus as in claim 2 wherein said at least one push-button slide includes a bifurcated bottom portion, said flat metal strip is inserted within the ends of said bifurcated portion and said compression spring is mounted within the lower portion of said ,push-buttonslide between an internal shoulder thereof and said flat metal strip.
5. Pushbutton switch apparatus as in claim 1 wherein said contact housing comprises a number of contact housing elements and a number of contact bridges each mounted within a respectivecontact housing element, and each of said contact housing elements including a push-button slide.

Claims (5)

1. Push-button switch apparatus, comprising: a contact housing; a printed circuit board having thereon conductive paths and forming the base of said contact housing; at least one contact bridge mounted within said housing including a conductive bearing element resting on one of said conductive paths and at least one pair of spaced contacts; means for biasing said at least one contact bridge so that one contact of said at least one pair of spaced contacts engages with another of said conductive paths; means mounted within said housing for moving said at least one contact bridge to remove said one contact from said conductive path and establish engagement of the other of said spaced contacts with another of said conductive paths, said means including at least one push-button slide; a compression spring mounted between said at least one pushbutton slide and an associated one of said at least one contact bridge for moving said contact bridge upon depression of said push-button slide; and an additional compression spring mounted between said at least one push-button slide and said housing for biasing an upper portion of said push-button slide above an upper surface of said housing.
2. Push-button switch apparatus as in claim 1 wherein said at least one contact bridge consists of a flat metal strip and further comprising means mounted within said housing for guiding said push-button slide therein.
3. Push-button switch apparatus as in claim 2 further comprising means mounted within said housing for preventing lateral movement of said at least one contact bridge.
4. Push-button switch apparatus as in claim 2 wherein said at least one push-button slide includes a bifurcated bottom portion, said flat metal strip is inserted within the ends of said bifurcated portion and said compression spring is mounted within the lower portion of said push-button slide between an internal shoulder thereof and said flat metal strip.
5. Push-button switch apparatus as in claim 1 wherein said contact housing comprises a number of contact housing elements and a number of contact bridges each mounted within a respective contact housing element, and each of said contact housing elements including a push-button slide.
US00152163A 1970-06-17 1971-06-11 Pushbutton switch assembly with pivotable conductive bridging member and multiple conductive path printed circuit board Expired - Lifetime US3731030A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH916870A CH514925A (en) 1970-06-17 1970-06-17 Side-by-side push button switches

Publications (1)

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US3731030A true US3731030A (en) 1973-05-01

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US00152163A Expired - Lifetime US3731030A (en) 1970-06-17 1971-06-11 Pushbutton switch assembly with pivotable conductive bridging member and multiple conductive path printed circuit board

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US (1) US3731030A (en)
JP (1) JPS5411508B1 (en)
CA (1) CA948685A (en)
CH (1) CH514925A (en)
DE (2) DE7103467U (en)
ES (1) ES197996Y (en)
FR (1) FR2099115A5 (en)
GB (1) GB1349954A (en)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3931487A (en) * 1973-06-27 1976-01-06 Etablissements Russenberger Electric momentary action push-button switch
USRE29440E (en) * 1973-01-02 1977-10-11 Bowmar Instrument Corporation Calculator keyboard switch with disc spring contact and printed circuit board
US4071715A (en) * 1975-12-17 1978-01-31 Societe Des Telephones Picart Lebas Push-button switch for a multifrequency dialling telephone set
US4118611A (en) * 1977-08-30 1978-10-03 International Business Machines Corporation Buckling spring torsional snap actuator
US4122319A (en) * 1976-02-11 1978-10-24 Euratom Electrical switch and its use for the control of machines
USRE30923E (en) * 1973-01-02 1982-05-04 Bowmar Instrument Corporation Calculator keyboard switch with disc spring contact and printed circuit board
US4618754A (en) * 1985-06-17 1986-10-21 David Gross Membrane switch with pivotable rocker
US5117074A (en) * 1987-05-12 1992-05-26 Alps Electric Co., Ltd. Waterproof structure for a switch device
US20030036300A1 (en) * 2001-08-14 2003-02-20 Robert Kralik Contactor with strand-free, single-interrupting current routing
US20090223802A1 (en) * 2008-03-05 2009-09-10 Juan Zak Jumper with integrated switch
US20090239416A1 (en) * 2005-06-22 2009-09-24 Richard John Everitt Apparatus for Mechanical and Electrical Connection
US20100224471A1 (en) * 2006-08-29 2010-09-09 Idec Corporation Push button switch device
WO2011050391A1 (en) * 2009-10-28 2011-05-05 Commonwealth Scientific And Industrial Research Organisation Impact detection method and apparatus

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2462035C3 (en) * 1974-08-22 1981-10-08 Kienzle Apparate Gmbh, 7730 Villingen-Schwenningen keyboard
IT207494Z2 (en) * 1985-10-03 1988-01-25 Cavis Cavetti Isolati Spa SWITCH STRUCTURE, PARTICULARLY DESIGNED FOR ELECTRIC WINDOWS OF MOTOR VEHICLES.

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US3415966A (en) * 1967-05-08 1968-12-10 Lucerne Products Inc Electrical switch with improved bridge contactor
US3531603A (en) * 1967-10-19 1970-09-29 Plessey Co Ltd Multi-position rotary electric switches
US3539749A (en) * 1968-12-18 1970-11-10 Western Electric Co Movable contacts with oppositely inclined keying slots for providing wiping action in a pushbutton switch
US3594523A (en) * 1969-05-08 1971-07-20 Skil Corp Electric switch with bridging contact

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Publication number Priority date Publication date Assignee Title
JPS4211541Y1 (en) * 1965-09-16 1967-06-28

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3415966A (en) * 1967-05-08 1968-12-10 Lucerne Products Inc Electrical switch with improved bridge contactor
US3531603A (en) * 1967-10-19 1970-09-29 Plessey Co Ltd Multi-position rotary electric switches
US3539749A (en) * 1968-12-18 1970-11-10 Western Electric Co Movable contacts with oppositely inclined keying slots for providing wiping action in a pushbutton switch
US3594523A (en) * 1969-05-08 1971-07-20 Skil Corp Electric switch with bridging contact

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE29440E (en) * 1973-01-02 1977-10-11 Bowmar Instrument Corporation Calculator keyboard switch with disc spring contact and printed circuit board
USRE30923E (en) * 1973-01-02 1982-05-04 Bowmar Instrument Corporation Calculator keyboard switch with disc spring contact and printed circuit board
US3931487A (en) * 1973-06-27 1976-01-06 Etablissements Russenberger Electric momentary action push-button switch
US4071715A (en) * 1975-12-17 1978-01-31 Societe Des Telephones Picart Lebas Push-button switch for a multifrequency dialling telephone set
US4122319A (en) * 1976-02-11 1978-10-24 Euratom Electrical switch and its use for the control of machines
US4118611A (en) * 1977-08-30 1978-10-03 International Business Machines Corporation Buckling spring torsional snap actuator
JPS5437281A (en) * 1977-08-30 1979-03-19 Ibm Accelerating device with key
JPS5741774B2 (en) * 1977-08-30 1982-09-04
US4618754A (en) * 1985-06-17 1986-10-21 David Gross Membrane switch with pivotable rocker
US5117074A (en) * 1987-05-12 1992-05-26 Alps Electric Co., Ltd. Waterproof structure for a switch device
US20030036300A1 (en) * 2001-08-14 2003-02-20 Robert Kralik Contactor with strand-free, single-interrupting current routing
US6894238B2 (en) * 2001-08-14 2005-05-17 Schaltbau Gmbh Contactor with strand-free, single-interrupting current routing
US20090239416A1 (en) * 2005-06-22 2009-09-24 Richard John Everitt Apparatus for Mechanical and Electrical Connection
US7717742B2 (en) * 2005-06-22 2010-05-18 Thomon Licensing Apparatus for mechanical and electrical connection
US20100224471A1 (en) * 2006-08-29 2010-09-09 Idec Corporation Push button switch device
US7994447B2 (en) * 2006-08-29 2011-08-09 Idec Corporation Push button switch device
US20090223802A1 (en) * 2008-03-05 2009-09-10 Juan Zak Jumper with integrated switch
US8872052B2 (en) * 2008-03-05 2014-10-28 Juan Zak Jumper with integrated switch
WO2011050391A1 (en) * 2009-10-28 2011-05-05 Commonwealth Scientific And Industrial Research Organisation Impact detection method and apparatus
AU2010312303B2 (en) * 2009-10-28 2016-11-10 A.G. Hahn And A.W. Hahn Impact detection method and apparatus

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Publication number Publication date
ES197996Y (en) 1975-10-01
CH514925A (en) 1971-10-31
JPS5411508B1 (en) 1979-05-15
CA948685A (en) 1974-06-04
DE2104404A1 (en) 1971-12-23
ES197996U (en) 1975-05-01
DE7103467U (en) 1974-02-28
GB1349954A (en) 1974-04-10
DE2104404B2 (en) 1973-06-20
FR2099115A5 (en) 1972-03-10
DE2104404C3 (en) 1974-01-10

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