EP0046575A2 - Parallel guide for a key switch with multiple buttons - Google Patents

Parallel guide for a key switch with multiple buttons Download PDF

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Publication number
EP0046575A2
EP0046575A2 EP81106490A EP81106490A EP0046575A2 EP 0046575 A2 EP0046575 A2 EP 0046575A2 EP 81106490 A EP81106490 A EP 81106490A EP 81106490 A EP81106490 A EP 81106490A EP 0046575 A2 EP0046575 A2 EP 0046575A2
Authority
EP
European Patent Office
Prior art keywords
button
key
key switch
support plate
housing
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.)
Granted
Application number
EP81106490A
Other languages
German (de)
French (fr)
Other versions
EP0046575B1 (en
EP0046575A3 (en
Inventor
Walter Wachs
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.)
Siemens AG
Original Assignee
Siemens 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 Siemens AG filed Critical Siemens AG
Publication of EP0046575A2 publication Critical patent/EP0046575A2/en
Publication of EP0046575A3 publication Critical patent/EP0046575A3/en
Application granted granted Critical
Publication of EP0046575B1 publication Critical patent/EP0046575B1/en
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J5/00—Devices or arrangements for controlling character selection
    • B41J5/08—Character or syllable selected by means of keys or keyboards of the typewriter type
    • B41J5/12—Construction of key buttons
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/02—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch
    • H01H3/12—Push-buttons
    • H01H3/122—Push-buttons with enlarged actuating area, e.g. of the elongated bar-type; Stabilising means therefor

Definitions

  • the invention relates to a key switch, in particular for keyboards of typewriters and similar devices, with a key button spanning several key positions and a key housing fastened in a recess in a support plate.
  • a key switch in particular for keyboards of typewriters, is known, which consists of a key housing with an associated key button and key plunger immersed in the key housing.
  • the button housing itself is locked in recesses in a support plate.
  • a key switch with a multiple button is arranged in such support plates, it has hitherto been customary to arrange the key switch in the center of the multiple button.
  • the carrier and the associated printed circuit board of a keyboard were each designed specifically for the installation of two keys with single and one key with double buttons.
  • the object of the invention is to design a key switch with a key spanning a plurality of keys in such a way that both key switches with single and multiple key buttons can be arranged in a keyboard without the keyboard structure having to be changed, or the key switch tending to jam.
  • a key switch of the type mentioned by at least one U-shaped parallel guide bracket spanned by the button from a longitudinal bracket and two side legs, the parallel guide bracket being pivoted about two axes of rotation parallel to the longitudinal bracket such that the first through the one end of the side legs extending axis of rotation is fixed via a bearing piece on a guide member which is arranged in a recess adjacent to the key housing and the second axis of rotation running through the other ends of the side legs is mounted in the key button.
  • the guide part is designed in the manner of the button housing. and has a central opening for receiving a guide tongue connected to the button. Due to the arrangement of a parallel guide bracket in connection with the mounting of the parallel guide bracket on a guide part, which is designed like the button housing of a single button, the carrier and printed circuit boards can always be made the same regardless of the subsequent button setting. This makes scheduling in production considerably easier. Even if such a key switch is designed as a triple key button, such a key switch does not tend to jam.
  • a keyboard of a teleprinter essentially consists of a printed circuit board 1 with the wiring arranged thereon and a support plate 2 arranged above the printed circuit board for receiving the individual key switches.
  • the support plate has recesses for the key switch, which consists of uniformly arranged, square receiving openings 3.
  • the individual key switches are latched in the receiving openings or soldered to the printed circuit board 1.
  • the double button or triple button 6 shown here is attached to the button plunger 5, which dips into the button housing 4 of the button switch with respect to a spring force, not shown here.
  • the double button is arranged asymmetrically with respect to the associated button housing 4.
  • a parallel guide is provided, which consists of a longitudinal bracket 7 with associated side legs 8.
  • the parallel guide bracket is pivoted about two axes of rotation which run parallel to the longitudinal bracket 7.
  • the first axis of rotation is formed by a web-like bearing piece 9, which is a component of the guide part 10.
  • the guide part 1o has a similar external shape to the key housing 4 and, like this, is locked in the support plate 2.
  • the second axis of rotation forms the longitudinal bracket 7. It is guided via bearing pins 11 in guide slots 12 of the button 6.
  • buttons 6 it is provided with a guide tongue 13 which, analogous to the button plunger 5, dips into the guide part 10.
  • the type of design of the guide part 1o makes it possible to provide a further additional button instead of this guide part 1o.
  • the parallel guide bracket in connection with the guide part 1o also prevents a jamming of the key switch in this case of a triple button, if it is e.g. is operated at the outer ends of the button 6.

Abstract

Der Tastenschalter mit einem mehrere Tasten überspannenden Tastenknopf (Doppelknopf) enthält einen U-förmigen Parallelführungsbügel (7, 8) der einerseits im Tastenknopf und andererseits über ein stegartiges Lagerstück (9) auf dem Führungsteil (10) befestigt ist. Das Führungsteil (10) hat die gleiche Gestalt wie das eigentliche Tastengehäuse (4) und ist in der dem Tastengehäuse (4) benachbarten Ausnehmung der Trageplatte (2) der Tastatur befestigt.The button switch with a button spanning several buttons (double button) contains a U-shaped parallel guide bracket (7, 8) which is fastened on the one hand in the button button and on the other hand via a web-like bearing piece (9) on the guide part (10). The guide part (10) has the same shape as the actual key housing (4) and is fastened in the recess of the support plate (2) of the keyboard adjacent to the key housing (4).

Description

Die Erfindung betrifft einen Tastenschalter, insbesondere für Tastaturen von Schreibmaschinen und ähnlichen Einrichtungen, mit einem mehrere Tastenplätze überspannenden Tastenknopf und einem in einer Ausnehmung einer Trageplatte befestigtem Tastengehäuse. Aus der DE-OS 28 54 o96 ist ein Tastenschalter, insbesondere für Tastaturen von Schreibmaschinen, bekannt, der aus einem Tastengehäuse mit zugehörigem Tastenknopf und in das Tastengehäuse eintauchenden Tastenstößel besteht. Das Tastengehäuse selbst ist in Ausnehmungen einer Trageplatte verrastet.The invention relates to a key switch, in particular for keyboards of typewriters and similar devices, with a key button spanning several key positions and a key housing fastened in a recess in a support plate. From DE-OS 28 54 o96 a key switch, in particular for keyboards of typewriters, is known, which consists of a key housing with an associated key button and key plunger immersed in the key housing. The button housing itself is locked in recesses in a support plate.

Ordnet man in derartigen Trageplatten einen Tastenschalter mit Mehrfachknopf an, so ist es bisher üblich, den Tastenschalter mittig zum Mehrfachknopf anzuordnen. Das bedeutet, die Träger- und die zugehörige Leiterplatte einer Tastatur wurden jeweils speziell für den Einbau von zwei Tasten mit Einfach- bzw. einer Taste mit Doppelknopf ausgeführt.If a key switch with a multiple button is arranged in such support plates, it has hitherto been customary to arrange the key switch in the center of the multiple button. This means that the carrier and the associated printed circuit board of a keyboard were each designed specifically for the installation of two keys with single and one key with double buttons.

Versucht man, einen Mehrfachtastenknopf so anzuordnen, daß der zugehörige Tastenschalter dazu unsymmetrisch sitzt, so neigt der den Schalter überragende Mehrfachtastenknopf infolge der einseitigen Lagerung zum Verklemmen.If you try to arrange a multi-button button so that the associated button switch sits asymmetrically, the multi-button button protruding from the switch tends to jam due to the one-sided mounting.

Aufgabe der Erfindung ist es, einen Tastenschalter'mit einem mehrere Tastenüberspannenden Tastenknopf so auszugestalten, daß in einer Tastatur sowohl Tastenschalter mit Einzel- als auch Mehrfachtastenknöpfen angeordnet werden können, ohne daß der Tastaturaufbau dazu verändert werden muß, oder der Tastenschalter zum Verklemmen neigt.The object of the invention is to design a key switch with a key spanning a plurality of keys in such a way that both key switches with single and multiple key buttons can be arranged in a keyboard without the keyboard structure having to be changed, or the key switch tending to jam.

Diese Aufgabe wird bei einem Tastenschalter der eingangs genannten Art durch mindestens einen U-förmigen, von dem Tastenknopf überspannten Parallelführungsbügel aus einem Längsbügel und zwei Seitenschenkeln gelöst, wobei der Parallelführungsbügel jeweils um zwei parallel zum Längsbügel verlaufende Drehachsen derart schwenkbar gelagert ist, daß die erste durch die einen Enden der Seitenschenkel verlaufende Drehachse über ein Lagerstück auf einem Führungsteil befestigt ist, das in einer dem Tastengehäuse benachbarten Ausnehmung angeordnet ist und die zweite durch die anderen Enden der Seitenschenkel laufende Drehachse in dem Tastenknopf gelagert ist.This object is achieved in a key switch of the type mentioned by at least one U-shaped parallel guide bracket spanned by the button from a longitudinal bracket and two side legs, the parallel guide bracket being pivoted about two axes of rotation parallel to the longitudinal bracket such that the first through the one end of the side legs extending axis of rotation is fixed via a bearing piece on a guide member which is arranged in a recess adjacent to the key housing and the second axis of rotation running through the other ends of the side legs is mounted in the key button.

Bei einer vorteilhaften Ausführungsform der Erfindung ist das Führungsteil in der Art des Tastengehäuses ausgebildet. und weist eine zentrale Öffnung zur Aufnahme einer dem Tastenknopf verbundenen Führungszunge auf. Durch die Anordnung eines Parallelführungsbügels in Verbindung mit der Lagerung des Parallelführungsbügels auf einem Führungsteil, das wie das Tastengehäuse einer Einzeltaste ausgebildet ist, können die Träger- und Leiterplatten unabhängig von der späteren Tastenknopfbestückung immer gleich ausgeführt werden. Die Disposition in der Fertigung wird dadurch erheblich erleichtert. Selbst bei der Ausbildung eines derartigen Tastenschalters als Dreifach-Tastenknopf neigt ein derartiger Tastenschalter nicht zum Verklemmen.In an advantageous embodiment of the invention, the guide part is designed in the manner of the button housing. and has a central opening for receiving a guide tongue connected to the button. Due to the arrangement of a parallel guide bracket in connection with the mounting of the parallel guide bracket on a guide part, which is designed like the button housing of a single button, the carrier and printed circuit boards can always be made the same regardless of the subsequent button setting. This makes scheduling in production considerably easier. Even if such a key switch is designed as a triple key button, such a key switch does not tend to jam.

Ausführungsformen der Erfindung sind in.den Zeichnungen dargestellt und im folgenden beispielsweise näher beschrieben.Embodiments of the invention are shown in the drawings and are described in more detail below, for example.

Es zeigen

  • Fig.1 eine Schnitt-Darstellung eines Tastenschalters mit einem mehrere Tasten überspannenden Knopf,und zwar in der Ausführung als Doppeltastenknopf und als Dreifachtastenknopf (punktgestrichelte Darstellung),
  • Fig. 2 eine Seitenansicht des Tastenschalters bei geöffnetem Tastenknopf und
  • Fig. 3 eine Draufsicht eines Tastenschalters bei geöffnetem Tastenknopf.
Show it
  • 1 shows a sectional illustration of a key switch with a button spanning several keys, specifically in the form of a double-button and a triple-button button (dash-dotted line),
  • Fig. 2 is a side view of the key switch with the button open and
  • Fig. 3 is a plan view of a key switch with the key button open.

Eine-Tastatur einer Fernschreibmaschine besteht im wesentlichen aus einer Leiterplatte 1 mit den darauf angeordneten Verdrahtungen und einer über der Leiterplatte angeordneten Trageplatte 2 zur Aufnahme der einzelnen Tastenschalter. Die Trageplatte weist Ausnehmungen für die Tastenschalter auf, die aus gleichmäßig angeordneten, quadratischen Aufnahmeöffnungen 3 besteht. In den Aufnahmeöffnungen sind die einzelnen Tastenschalter verrastet bzw. mit der Leiterplatte 1 verlötet. Der hier dargestellte Doppeltastenknopf bzw. Dreifachtastenknopf 6 ist auf dem Tastenstößel 5 befestigt, der gegenüber einer hier nicht dargestellten Federkraft in das Tastengehäuse 4 des Tastenschalters eintaucht. Der Doppeltastenknopf ist gegenüber dem zugehörigen Tastengehäuse 4 unsymmetrisch angeordnet. Gegen Verklemmen der Taste beim Betätigen ist eine Parallelführung vorgesehen, die aus einem Längsbügel 7 mit zugehörigen Seitenschenkeln 8 besteht. Der Parallelführungsbügel ist über zwei Drehachsen schwenkbar gelagert, die parallel zum Längsbügel 7 verlaufen. Die erste Drehachse wird durch ein stegartiges Lagerstück 9 gebildet, das ein Bestandteil des Führungsteils 1o ist. Das Führungsteil 1o hat eine ähnliche Außenform wie das Tastengehäuse 4 und wird wie dieses in der Trageplatte 2 verrastet. Die zweite Drehachse bildet das Längsbügel 7. Er ist über Lagerstifte 11 in Führungsschlitzen 12 des Tastenknopfes 6 geführt.A keyboard of a teleprinter essentially consists of a printed circuit board 1 with the wiring arranged thereon and a support plate 2 arranged above the printed circuit board for receiving the individual key switches. The support plate has recesses for the key switch, which consists of uniformly arranged, square receiving openings 3. The individual key switches are latched in the receiving openings or soldered to the printed circuit board 1. The double button or triple button 6 shown here is attached to the button plunger 5, which dips into the button housing 4 of the button switch with respect to a spring force, not shown here. The double button is arranged asymmetrically with respect to the associated button housing 4. To prevent the button from jamming when pressed, a parallel guide is provided, which consists of a longitudinal bracket 7 with associated side legs 8. The parallel guide bracket is pivoted about two axes of rotation which run parallel to the longitudinal bracket 7. The first axis of rotation is formed by a web-like bearing piece 9, which is a component of the guide part 10. The guide part 1o has a similar external shape to the key housing 4 and, like this, is locked in the support plate 2. The second axis of rotation forms the longitudinal bracket 7. It is guided via bearing pins 11 in guide slots 12 of the button 6.

Zur weiteren exakten Führung des Tastenknopfes 6 ist dieser mit einer Führungszunge 13 versehen, die analog zu dem Tastenstößel 5 in das Führungsteil 1o eintaucht.For further exact guidance of the button 6, it is provided with a guide tongue 13 which, analogous to the button plunger 5, dips into the guide part 10.

Die Art der Ausgestaltung des Führungsteiles 1o ermöglicht es, anstelle dieses Führungsteiles 1o auch eine weitere zusätzliche Taste vorzusehen.The type of design of the guide part 1o makes it possible to provide a further additional button instead of this guide part 1o.

Beabsichtigt man, anstelle des Doppeltastenknopfes ein Dreifachknopf vorzusehen, so wird dies in einfacher Weise dadurch bewerkstelligt, daß man entsprechend der punktgestrichelten Darstellung den parallelen Führungsbügel und das zugehörige stegartige Lagerstück 9 entsprechend um etwa die Breite einer Aufnahmeöffnung 3 verlängert.If the intention is to provide a triple button instead of the double button, this is accomplished in a simple manner by correspondingly extending the parallel guide bracket and the associated web-like bearing piece 9 by approximately the width of a receiving opening 3 in accordance with the dashed line.

Der Parallelführungsbügel in Verbindung mit dem Führungsteil 1o verhindert auch in diesem Falle eines Dreifachknopfes ein Verklemmen des Tastenschalters, wenn dieser z.B. an den äußeren Enden des Tastenknopfes 6 betätigt wird.The parallel guide bracket in connection with the guide part 1o also prevents a jamming of the key switch in this case of a triple button, if it is e.g. is operated at the outer ends of the button 6.

BezugszeichenlisteReference symbol list

  • 1) Leiterplatte1) PCB
  • 2) Trageplatte2) support plate
  • 3) Aufnahmeöffnungen3) receiving openings
  • 4) Tastengehäuse4) Key housing
  • 5) Tastenstößel5) Key tappet
  • 6) Tastenknopf6) Key button
  • 7) Längsbügel7) Longitudinal bracket
  • 8) Seitenschenkel8) side thighs
  • 9) stegartiges Lagerstück9) web-like bearing piece
  • 10) Führungsteil1 0 ) Guide part
  • 11) Lagerstifte11) bearing pins
  • 12) Führungsschlitze12) guide slots
  • 13) Führungszungen13) guide tongues
  • 14) Zentrale Öffnung14) Central opening

Claims (5)

1. Tastenschalter, insbesondere für Tastaturen von Schreibmaschinen und ähnlichen Einrichtungen, mit einem mehrere Tasten überspannenden Tastenknopf und einem in eine Ausnehmung einer Trageplatte befestigten Tasten-" gehäuse, gekennzeichnet durch mindestens einen U-förmigen, von dem Tastenknopf (6) überspannten Parallelführungsbügel aus einem Längsbügel (7) und zwei Seitenschenkeln (8), wobei der Parallelführungsbügel jeweils um zwei parallel zum Längsbügel (7) - verlaufende Drehachsen derart schwenkbar gelagert ist, daß die erste durch die einen Enden der.Seitenschenkel (7) verlaufende Drehachse über ein Lagerstück (9) auf einem Führungsteil (10) befestigt ist, das in einer dem Tastengehäuse (4) benachbarten Ausnehmung (3) der Trageplatte (2) angeordnet ist, und die'zweite durch die anderen Enden der Seitenschenkel (8) verlaufende Drehachse in dem Tastenknopf (6) gelagert ist.1. Key switch, in particular for keyboards of typewriters and similar devices, with a key button spanning several keys and a key "housing fastened in a recess of a support plate, characterized by at least one U-shaped parallel guide bracket spanned by the key button (6) from a Longitudinal bracket (7) and two side legs (8), the parallel guide bracket being pivoted in each case about two axes of rotation running parallel to the longitudinal bar (7) such that the first axis of rotation running through the one ends of the side legs (7) via a bearing piece ( 9) is fastened on a guide part (10) which is arranged in a recess (3) of the support plate (2) which is adjacent to the key housing (4), and the second axis of rotation in the key button which runs through the other ends of the side legs (8) (6) is stored. 2. Tastenschalter nach Anspruch 1, dadurch gekennzeichnet, daß das Führungsteil (10) in der Art des Tastengehäuses (4) ausgebildet ist und eine zentrale Öffnung (14) zur Aufnahme einer mit dem Tastenknopf (6) verbundenen Führungszunge (13) aufweist.2. Key switch according to claim 1, characterized in that the guide part (10) is designed in the manner of the key housing (4) and has a central opening (14) for receiving a with the key button (6) connected guide tongue (13). 3. Tastenschalter nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, daß der Parallelführungsbügel einerseits über Lagerstifte (11) in Führungsschlitzen (12) des Tastenknopfes (6), andererseits über Lagerstifte (11) auf dem stegartigen Lagerstück (9) schwenkbar gelagert ist.3. Key switch according to one of claims 1 or 2, characterized in that the parallel guide bracket on the one hand via bearing pins (11) in guide slots (12) of the button (6), on the other hand via bearing pins (11) on the web-like bearing piece (9) is pivotally mounted . 4. Tastenschalter nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß das Tastengehäuse (4) und das Führungsteil (10) über Rastelemente in der Trageplatte (2) befestigt ist.4. Key switch according to one of claims 1 to 3, characterized in that the key housing (4) and the guide part (1 0 ) via locking elements in the support plate (2) is attached. 5. Tastenschalter nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß bei der Ausgestaltung des Tastenschalters mit einem Dreifachknopf das stegartige Lagerstück (9) sich über drei Aufnahmeöffnungen (3) der Trageplatte (2) erstreckt.5. Key switch according to one of claims 1 to 4, characterized in that in the configuration of the key switch with a triple button, the web-like bearing piece (9) extends over three receiving openings (3) of the support plate (2).
EP81106490A 1980-08-27 1981-08-20 Parallel guide for a key switch with multiple buttons Expired EP0046575B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3032282 1980-08-27
DE3032282A DE3032282C2 (en) 1980-08-27 1980-08-27 Key switch with a key housing for installation in a recessed support plate of keyboards in typewriters

Publications (3)

Publication Number Publication Date
EP0046575A2 true EP0046575A2 (en) 1982-03-03
EP0046575A3 EP0046575A3 (en) 1982-09-08
EP0046575B1 EP0046575B1 (en) 1985-11-13

Family

ID=6110506

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81106490A Expired EP0046575B1 (en) 1980-08-27 1981-08-20 Parallel guide for a key switch with multiple buttons

Country Status (4)

Country Link
US (1) US4475832A (en)
EP (1) EP0046575B1 (en)
CA (1) CA1173479A (en)
DE (1) DE3032282C2 (en)

Cited By (7)

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Publication number Priority date Publication date Assignee Title
US4384796A (en) * 1982-03-18 1983-05-24 Oak Industries Inc. Keyboard space bar stabilizer
WO1984001838A1 (en) * 1982-10-26 1984-05-10 Tesch Ag Watch-case with press-buttons
US4453063A (en) * 1983-08-03 1984-06-05 Illinois Tool Works Inc. Keyswitch configuration with torque rod holder
US4468145A (en) * 1982-03-18 1984-08-28 Oak Industries, Inc. Keyboard space bar stabilizer
DE3329698A1 (en) * 1983-08-17 1985-03-07 Preh, Elektrofeinmechanische Werke Jakob Preh Nachf. Gmbh & Co, 8740 Bad Neustadt PRINT BUTTON
DE3405654A1 (en) * 1984-02-17 1985-08-22 Brown, Boveri & Cie Ag, 6800 Mannheim Operating device for switching devices
US5488210A (en) * 1992-06-11 1996-01-30 Alps Electric Co., Ltd. Push button switch

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US4535210A (en) * 1984-04-18 1985-08-13 Illinois Tool Works Inc. Keyswitch stabilizing device
JP2585754Y2 (en) * 1992-10-01 1998-11-25 エスエムケイ株式会社 Keyboard key top assembly mechanism
US5424516A (en) * 1993-09-23 1995-06-13 Emmons; Charles E. Low profile pushbutton switch
US5668358A (en) * 1994-07-05 1997-09-16 Ultimate Rechnology Corporation Reconfigurable keyboard
US5669723A (en) * 1996-03-26 1997-09-23 Behavior Technical Computer Corp. Key assembly for computer keyboard
US5941373A (en) * 1997-05-30 1999-08-24 Mustke Corporation Integrated keyboard key assembly
TW346213U (en) * 1997-08-01 1998-11-21 Acer Peripherals Inc Improvement for multiple pushing key

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US3292761A (en) * 1965-11-04 1966-12-20 Navigation Computer Corp Typewriter key lever and mount therefor
DE2208647A1 (en) * 1972-02-24 1973-09-06 Alps Electric Co Ltd SPACEBAR
DE2404895A1 (en) * 1974-02-01 1975-08-14 Standard Elektrik Lorenz Ag Single action key for space bar actuation - has built-in snap action spring for low operating force
US3916150A (en) * 1974-03-04 1975-10-28 Stackpole Component Co Data machine keyboard assembly with elongated key cap for actuating an electric switch
DE2854096A1 (en) * 1978-12-14 1980-06-19 Siemens Ag KEY SWITCHES, ESPECIALLY FOR KEYBOARDS IN TYPEWRITERS, AND SIMILAR DEVICES

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Publication number Priority date Publication date Assignee Title
US3711685A (en) * 1971-12-27 1973-01-16 Cherry Electrical Prod Keyboard switch actuator
US3720801A (en) * 1972-02-03 1973-03-13 Alps Electric Co Ltd Space key
US4188136A (en) * 1978-01-19 1980-02-12 Cherry Electrical Prod's. Corp. Keyboard switch actuator and locking assembly

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3292761A (en) * 1965-11-04 1966-12-20 Navigation Computer Corp Typewriter key lever and mount therefor
DE2208647A1 (en) * 1972-02-24 1973-09-06 Alps Electric Co Ltd SPACEBAR
DE2404895A1 (en) * 1974-02-01 1975-08-14 Standard Elektrik Lorenz Ag Single action key for space bar actuation - has built-in snap action spring for low operating force
US3916150A (en) * 1974-03-04 1975-10-28 Stackpole Component Co Data machine keyboard assembly with elongated key cap for actuating an electric switch
DE2854096A1 (en) * 1978-12-14 1980-06-19 Siemens Ag KEY SWITCHES, ESPECIALLY FOR KEYBOARDS IN TYPEWRITERS, AND SIMILAR DEVICES

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4384796A (en) * 1982-03-18 1983-05-24 Oak Industries Inc. Keyboard space bar stabilizer
US4468145A (en) * 1982-03-18 1984-08-28 Oak Industries, Inc. Keyboard space bar stabilizer
WO1984001838A1 (en) * 1982-10-26 1984-05-10 Tesch Ag Watch-case with press-buttons
US4453063A (en) * 1983-08-03 1984-06-05 Illinois Tool Works Inc. Keyswitch configuration with torque rod holder
DE3329698A1 (en) * 1983-08-17 1985-03-07 Preh, Elektrofeinmechanische Werke Jakob Preh Nachf. Gmbh & Co, 8740 Bad Neustadt PRINT BUTTON
EP0134509A2 (en) * 1983-08-17 1985-03-20 Preh-Werke GmbH & Co. KG Push button
EP0134509A3 (en) * 1983-08-17 1987-05-06 Preh, Elektrofeinmechanische Werke Jakob Preh Nachf. Gmbh & Co. Push button
DE3405654A1 (en) * 1984-02-17 1985-08-22 Brown, Boveri & Cie Ag, 6800 Mannheim Operating device for switching devices
US5488210A (en) * 1992-06-11 1996-01-30 Alps Electric Co., Ltd. Push button switch

Also Published As

Publication number Publication date
DE3032282A1 (en) 1982-03-04
EP0046575B1 (en) 1985-11-13
US4475832A (en) 1984-10-09
DE3032282C2 (en) 1982-10-28
EP0046575A3 (en) 1982-09-08
CA1173479A (en) 1984-08-28

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