WO1990000304A1 - Electronic apparatus - Google Patents

Electronic apparatus Download PDF

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Publication number
WO1990000304A1
WO1990000304A1 PCT/US1989/002468 US8902468W WO9000304A1 WO 1990000304 A1 WO1990000304 A1 WO 1990000304A1 US 8902468 W US8902468 W US 8902468W WO 9000304 A1 WO9000304 A1 WO 9000304A1
Authority
WO
WIPO (PCT)
Prior art keywords
housing
keyboard module
electronic apparatus
keyboard
bezel
Prior art date
Application number
PCT/US1989/002468
Other languages
French (fr)
Inventor
George Heys, Jr.
Andrew Emil Yandora
Philip David Mcdowell
Original Assignee
Ncr Corporation
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 Ncr Corporation filed Critical Ncr Corporation
Publication of WO1990000304A1 publication Critical patent/WO1990000304A1/en

Links

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
    • B41J29/00—Details of, or accessories for, typewriters or selective printing mechanisms not otherwise provided for
    • B41J29/38—Drives, motors, controls or automatic cut-off devices for the entire printing mechanism
    • B41J29/387—Automatic cut-off devices
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/02—Input arrangements using manually operated switches, e.g. using keyboards or dials
    • G06F3/0202—Constructional details or processes of manufacture of the input device
    • 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
    • H01H2219/00—Legends
    • H01H2219/002—Legends replaceable; adaptable
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2219/00—Legends
    • H01H2219/028—Printed information
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2223/00—Casings
    • H01H2223/01—Mounting on appliance
    • H01H2223/012—Snap mounting
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2223/00—Casings
    • H01H2223/01—Mounting on appliance
    • H01H2223/028—Mounting on appliance detachable
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2223/00—Casings
    • H01H2223/034—Bezel
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2223/00—Casings
    • H01H2223/044—Protecting cover
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2229/00—Manufacturing
    • H01H2229/062—Maintenance or repair facilities
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2231/00—Applications
    • H01H2231/004—CRT

Definitions

  • the present invention relates to an electronic apparatus and more particularly, but not exclusively, to a customer serviceable data processing terminal.
  • Serviceability by customers is an important consideration in the design of certain data processing terminals. Such serviceability is enhanced by providing ready access to the interior of the terminal where the electronic components are normally located. In addition, safety requirements set forth by various organizations such as the Underwriter Laboratories (UL) and the Canadian Standards Association (CSA) must be observed.
  • UL Underwriter Laboratories
  • CSA Canadian Standards Association
  • the present invention provides an electronic apparatus including a housing and a keyboard module, characterized in that said keyboard module is releasably mounted on said housing in a position whereby removal of said keyboard module from said housing provides access to the interior of sa'd housing for servicing electronic components therein and further characterized by cooperating electrical connector means on said keyboard module and said housing to provide electrical coupling between said keyboard module and said elsctrical components within said housing, said electrical connector means forming part of electrical circuit means for interrupting the power supply to said electronic components whenever said keyboard module is removed from said housing.
  • Figs. 1A and IB taken together, constitute an exploded perspective view of a keyboard and a terminal housing
  • Fig. 2 is an elevation view of the keyboard assembled to the terminal housing
  • Fig. 3 is an exploded elevation view of the keyboard and the terminal housing
  • Fig. 4 is a diagram of a circuit for interrupting power to the terminal when the keyboard is removed therefrom;
  • Fig. 5 is a plan view of the keyboard module
  • Fig. 6 is a rear view of the keyboard module
  • Fig. 7 is an elevation view of the keyboard module
  • Fig. 8 is a plan view of the key caption sheet.
  • Fig. 9 is a plan view of the transparent overlay.
  • a terminal housing 20 includes a body 22, a top 24 and a side piece 26 which is removable and replaceable to permit some alterations in the terminal housings to meet differing customer needs with respect to certain components such as magnetic stripe readers. Assembly of the elements 22, 24 and 26 leaves a large aperture at the upper front of the terminal 20, through which access may be had to the interior of the terminal 20 for purposes of maintenance and repair. This aperture is closed when the terminal is in use by a keyboard 28, shown in exploded form in Fig. 1A.
  • the keyboard 28 includes a keyboard module 30, a key caption sheet 32, a transparent overlay 34 and a bezel 36 which frames and retains the sheet 32 and overlay 34 of the keyboard 28.
  • the keyboard module 30 contains a plurality of touch-activated switch pads 40 arranged in a suitable keyboard configuration. Depression of the switch pads 4.1 causes switch closure or other appropriate means for the generation of electronic signals which are transmitted through an electrical connector 42 which operatively engages with a mating connector 44 connected to other electrical components within the terminal 20 when the keyboard 28 is assembled to the remainder of the terminal exterior structure.
  • the power supply circuit generally designated as 46 shown in Fig. 4.
  • the ground connection 48 for this circuit is located in the keyboard 28. Said circuit extends through the connectors 42, 44.
  • the circuit also includes an NPN transistor 50, the base of which is connected through a resistor 52 to a control conductor 54.
  • the emitter of the transistor 50 is connected through a resistor 56 to a +5-volt regulated source of potential 58, and to the ground connection 48.
  • the collector of the transistor 50 is connected through a resistor 60 to a +5-volt regulated source of potential 62, and is also connected via a conductor 64 through a connector 66 to a power supply (not shown) for the terminal 20.
  • operation of the power supply can be controlled by the operator or by other terminal functions by means of a signal of proper level on the conductor 54. It will further be seen that when the keyboard 28 is removed from the terminal 20, the ground connection through the connectors 42, 44 is broken, and the signal level on the collector of the transistor 50 remains at a high +5-volt level, so that the power supply remains turned off.
  • this is provided on the bottom with a matrix of reinforcing - "" bars 70 and 72 at right angles to each other, to improve the rigidity of the module 30.
  • the connector 42 is fixed within a support 74 which is fixed to the horizontal base 77 of the module 30, and to several of the bars 72.
  • the module 30 is provided with three tabs or projections 76 which engage complementary slots 78 when the keyboard 28 is assembled with the rest of the terminal 20.
  • the module 30 is provided with two cut-away portions 79.
  • a projection 80 which extends across part of the bottom opening of the portion 79.
  • the portions 79 and projections 80 coact with inwardly extending tabs 82 molded integrally with the housing 22 on one side of the terminal 20, and with inwardly extending tabs 84 molded integrally with the side piece 26 on the other side of the terminal 20 to assist in retaining the keyboard 28 in position in the terminal 20.
  • the upper ends 86 of internal ribs 88 engage the bottom of the keyboard module 30 at the edges thereof to assist in such retention.
  • the keyboard module 30 is also provided at each side toward the upper end with a slot 90 which is adapted to receive tabs 92 of the key caption sheet 32 and tabs 94 of the transparent overlay sheet 34.
  • the cooperating slots 90 and tabs 92, 94 function to hold the key caption sheet 32 and the transparent overlay sheet 34 in proper superimposed relationship to the keyboard module 30.
  • the key caption sheet 32 is positioned directly over the keyboard module 30, with the tabs 92 in the slots 90. With the sheet 32 so positioned, various indicia bearing portions of the sheet 32, such as areas 96 representing numeric keys of various values, and area 98 representing the "ENTER" key, are located directly over corresponding switch pads 40, so that pressure applied by the finger of a human operator on such area on the sheet 32 causes operation of the corresponding switch pad in the keyboard module 30.
  • the transparent overlay sheet 34 is positioned directly over the key caption sheet 32, with the tabs 94 in the slots 90 directly over the tabs 92 of the caption sheet 32. With the sheet 34 so positioned, the sheet 34 provides a transparent protective cover over the sheet 32. Areas of the sheet 34, such as the area 100, are defined by lines molded into said sheet, and correspond to the key areas such as 96 and 98 on the sheet 32.
  • the keyboard module 30 When the keyboard 28 is to be assembled to the remainder of the housing structure of the terminal 20, the keyboard module 30 is moved into operative relationship with the opening in the housing of the terminal 20, so that the cut-away portions 79 on both sides of the module 30 receive the tabs 82 and 84 on the housing 22 and the side piece 26, respectively. The module 30 is then shifted toward the top 24. This causes the projections 80 to move beneath the tabs 82, 84, and causes the tabs 76 to move into engagement with the slots 78 on the top 24.
  • the connector 42 on the module 30 mates with the connector 44 within, the terminal 20 and establishes electrical connection between the module 30 and the remainder of the terminal.
  • the sheets 32 and 34 are then superimposed on the module 30 and the tabs 92 and 94 of said sheets are positioned in the slots 90 of the module 30.
  • the bezel 36 is added in order to close the gaps present between the assembly and the surrounding upper edges of the housing 22, the top 24 and the side piece 26. Projections 102 of the bezel 36 are located in openings 104 in the top 24, and the bezel 36 is rotated downwardly until integral plastic latches 106 on the underside of the lower end of the bezel engage with retainers 108 on the inside surface of the front end of the housing 22 of the terminal 20, to lock the bezel 36 in place.
  • the access aperture to the interior of the terminal 20 is closed, and the various elements of the exterior provide a secure housing with no access to the interior. Also the power supply circuit is completed, thus enabling the terminal 20 to function.
  • the bezel 36 is first removed by prying up its lower or front edge against the flexible engagement of the latch 106 with the retainer 108, and then shifting the bezel so that the tabs 102 are moved out of engagement with the openings 104.
  • the sheets 32, 34 can be taken off the keyboard module 30, and said module can be shifted so that the connectors 42, 44 are separated and the tabs 76 move out of engagement with the slots 78.
  • the projections 80 move out from under the tabs 82, 84, and the keyboard module can be lifted away from the remainder of the housing of the terminal 20 to provide access to the interior thereof.

Abstract

An electronic apparatus, such as a customer serviceable data processing terminal, including a keyboard module (30) releasably mounted on a housing (20) in a position whereby removal of the keyboard module (30) from the housing (20) provides access to the interior of the housing (20) for servicing electronic components therein. Cooperating electrical connector means (42, 44) are provided on the keyboard module (30) and the housing (20) to provide electrical coupling between the keyboard module (30) and the electronic components within the housing (20). The electrical connector means (42, 44) forms part of an electrical circuit (46) for interrupting the power supply to the electronic components whenever the keyboard module (30) is removed from the housing (20).

Description

ELECTRONIC APPARATUS
Technical Field
The present invention relates to an electronic apparatus and more particularly, but not exclusively, to a customer serviceable data processing terminal.
Background Art
Serviceability by customers is an important consideration in the design of certain data processing terminals. Such serviceability is enhanced by providing ready access to the interior of the terminal where the electronic components are normally located. In addition, safety requirements set forth by various organizations such as the Underwriter Laboratories (UL) and the Canadian Standards Association (CSA) must be observed.
Disclosure of the Invention
It is an object of the present invention to provide an electronic apparatus, such as a customer serviceable data processing terminal, in which servicing of the electronic apparatus is facilitated whilst also ensuring that safety requirements are observed.
Accordingly, the present invention provides an electronic apparatus including a housing and a keyboard module, characterized in that said keyboard module is releasably mounted on said housing in a position whereby removal of said keyboard module from said housing provides access to the interior of sa'd housing for servicing electronic components therein and further characterized by cooperating electrical connector means on said keyboard module and said housing to provide electrical coupling between said keyboard module and said elsctrical components within said housing, said electrical connector means forming part of electrical circuit means for interrupting the power supply to said electronic components whenever said keyboard module is removed from said housing.
Brief Description of the Drawings
An embodiment of the present invention will now be described by way of example, with reference to the accompanying drawings, in which:
Figs. 1A and IB, taken together, constitute an exploded perspective view of a keyboard and a terminal housing;
Fig. 2 is an elevation view of the keyboard assembled to the terminal housing;
Fig. 3 is an exploded elevation view of the keyboard and the terminal housing;
Fig. 4 is a diagram of a circuit for interrupting power to the terminal when the keyboard is removed therefrom;
Fig. 5 is a plan view of the keyboard module;
Fig. 6 is a rear view of the keyboard module;
Fig. 7 is an elevation view of the keyboard module;
Fig. 8 is a plan view of the key caption sheet; and
Fig. 9 is a plan view of the transparent overlay.
Best Mode for Carrying Out the Invention
Referring now to Figs. 1A and IB, a terminal housing 20 includes a body 22, a top 24 and a side piece 26 which is removable and replaceable to permit some alterations in the terminal housings to meet differing customer needs with respect to certain components such as magnetic stripe readers. Assembly of the elements 22, 24 and 26 leaves a large aperture at the upper front of the terminal 20, through which access may be had to the interior of the terminal 20 for purposes of maintenance and repair. This aperture is closed when the terminal is in use by a keyboard 28, shown in exploded form in Fig. 1A. The keyboard 28 includes a keyboard module 30, a key caption sheet 32, a transparent overlay 34 and a bezel 36 which frames and retains the sheet 32 and overlay 34 of the keyboard 28.
The keyboard module 30 contains a plurality of touch-activated switch pads 40 arranged in a suitable keyboard configuration. Depression of the switch pads 4.1 causes switch closure or other appropriate means for the generation of electronic signals which are transmitted through an electrical connector 42 which operatively engages with a mating connector 44 connected to other electrical components within the terminal 20 when the keyboard 28 is assembled to the remainder of the terminal exterior structure.
Included in the circuitry extending through the connectors 42, 44 is the power supply circuit generally designated as 46 shown in Fig. 4. The ground connection 48 for this circuit is located in the keyboard 28. Said circuit extends through the connectors 42, 44. The circuit also includes an NPN transistor 50, the base of which is connected through a resistor 52 to a control conductor 54. The emitter of the transistor 50 is connected through a resistor 56 to a +5-volt regulated source of potential 58, and to the ground connection 48. The collector of the transistor 50 is connected through a resistor 60 to a +5-volt regulated source of potential 62, and is also connected via a conductor 64 through a connector 66 to a power supply (not shown) for the terminal 20. It will be seen that operation of the power supply can be controlled by the operator or by other terminal functions by means of a signal of proper level on the conductor 54. It will further be seen that when the keyboard 28 is removed from the terminal 20, the ground connection through the connectors 42, 44 is broken, and the signal level on the collector of the transistor 50 remains at a high +5-volt level, so that the power supply remains turned off.
Returning to the keyboard module 30, this is provided on the bottom with a matrix of reinforcing -"" bars 70 and 72 at right angles to each other, to improve the rigidity of the module 30. The connector 42 is fixed within a support 74 which is fixed to the horizontal base 77 of the module 30, and to several of the bars 72.
At its upper end, adjacent the connector 42, the module 30 is provided with three tabs or projections 76 which engage complementary slots 78 when the keyboard 28 is assembled with the rest of the terminal 20.
Along each side, the module 30 is provided with two cut-away portions 79. In each portion 79 is provided a projection 80 which extends across part of the bottom opening of the portion 79. The portions 79 and projections 80 coact with inwardly extending tabs 82 molded integrally with the housing 22 on one side of the terminal 20, and with inwardly extending tabs 84 molded integrally with the side piece 26 on the other side of the terminal 20 to assist in retaining the keyboard 28 in position in the terminal 20. In addition, the upper ends 86 of internal ribs 88 engage the bottom of the keyboard module 30 at the edges thereof to assist in such retention.
The keyboard module 30 is also provided at each side toward the upper end with a slot 90 which is adapted to receive tabs 92 of the key caption sheet 32 and tabs 94 of the transparent overlay sheet 34. The cooperating slots 90 and tabs 92, 94 function to hold the key caption sheet 32 and the transparent overlay sheet 34 in proper superimposed relationship to the keyboard module 30.
The key caption sheet 32 is positioned directly over the keyboard module 30, with the tabs 92 in the slots 90. With the sheet 32 so positioned, various indicia bearing portions of the sheet 32, such as areas 96 representing numeric keys of various values, and area 98 representing the "ENTER" key, are located directly over corresponding switch pads 40, so that pressure applied by the finger of a human operator on such area on the sheet 32 causes operation of the corresponding switch pad in the keyboard module 30.
The transparent overlay sheet 34 is positioned directly over the key caption sheet 32, with the tabs 94 in the slots 90 directly over the tabs 92 of the caption sheet 32. With the sheet 34 so positioned, the sheet 34 provides a transparent protective cover over the sheet 32. Areas of the sheet 34, such as the area 100, are defined by lines molded into said sheet, and correspond to the key areas such as 96 and 98 on the sheet 32.
When the keyboard 28 is to be assembled to the remainder of the housing structure of the terminal 20, the keyboard module 30 is moved into operative relationship with the opening in the housing of the terminal 20, so that the cut-away portions 79 on both sides of the module 30 receive the tabs 82 and 84 on the housing 22 and the side piece 26, respectively. The module 30 is then shifted toward the top 24. This causes the projections 80 to move beneath the tabs 82, 84, and causes the tabs 76 to move into engagement with the slots 78 on the top 24. In addition, the connector 42 on the module 30 mates with the connector 44 within, the terminal 20 and establishes electrical connection between the module 30 and the remainder of the terminal. The sheets 32 and 34 are then superimposed on the module 30 and the tabs 92 and 94 of said sheets are positioned in the slots 90 of the module 30.
After the assembly of the module 30 and the sheets 32 and 34 is in position, the bezel 36 is added in order to close the gaps present between the assembly and the surrounding upper edges of the housing 22, the top 24 and the side piece 26. Projections 102 of the bezel 36 are located in openings 104 in the top 24, and the bezel 36 is rotated downwardly until integral plastic latches 106 on the underside of the lower end of the bezel engage with retainers 108 on the inside surface of the front end of the housing 22 of the terminal 20, to lock the bezel 36 in place.
With the keyboard 28 fixed in position, the access aperture to the interior of the terminal 20 is closed, and the various elements of the exterior provide a secure housing with no access to the interior. Also the power supply circuit is completed, thus enabling the terminal 20 to function. When the keyboard 26 is removed, in order to provide access to the terminal interior for repair or maintenance, or for some other reason, the bezel 36 is first removed by prying up its lower or front edge against the flexible engagement of the latch 106 with the retainer 108, and then shifting the bezel so that the tabs 102 are moved out of engagement with the openings 104. With the bezel removed, the sheets 32, 34 can be taken off the keyboard module 30, and said module can be shifted so that the connectors 42, 44 are separated and the tabs 76 move out of engagement with the slots 78. The projections 80 move out from under the tabs 82, 84, and the keyboard module can be lifted away from the remainder of the housing of the terminal 20 to provide access to the interior thereof.

Claims

1. An electronic apparatus including a housing (20) and a keyboard module (30), characterized in that said keyboard module (30) is releasably mounted on said housing (20) in a position /hereby removal of said keyboard module (30) from said housing (20) provides access to the interior of said housing (20) for servicing electronic components therein and" further characterized by cooperating electrical connector means (42, 44) on said keyboard module (30) and said housing (20) to provide electrical coupling between said keyboard module (30) and said electrical components within said housing (20), said electrical connector means (42, 44) forming part of electrical circuit means (46) for interrupting the power supply to said electronic components whenever said keyboard module (30) is removed from said housing (20).
2. An electronic apparatus as claimed in claim 1, characterized in that said electrical connector means (42, 44) includes a first electrical connector (42) secured to said keyboard module (30) and a second mating electrical connector (44) on said housing (20) .
3. An electronic apparatus as claimed in claim 1 or claim 2, characterized by latching means (76) cooperable with latching elements (78) of said housing (20) to retain said keyboard module (30) in assembled relation to said housing (20).
4. An electronic apparatus according to any one of claims 1 to 3, characterized by an overlay (32) positionable over said keyboard module (30) to identify various key positions of said keyboard module (30) and being provided with means (92) for attachment to said keyboard module (30); and a transparent shield (34) positionable over said overlay (32) for the protection thereof and being provided with means (94) for attachment to said keyboard module (30).
5. An electronic apparatus according to claim 4, characterized by a bezel (36) which fits over the assembled keyboard module (30), overlay (32) and shield (34) when said keyboard module (30) is assembled with said housing (20), and securing means (102, 106) for said bezel (36).
6. An electronic apparatus as claimed in any one of claims 1 to 5, characterized in that said keyboard module (30) is provided with a reinforcing structure (70, 72) to provide added rigidity.
7. An electronic apparatus as claimed in claim 4, characterized in that said means (90, 92, 94) for attachment for said overlay (32) and said shield (34) to said keyboard module (30) include slots (90) on said keyboard module (30) and complementary tabs (92, 94) on said overlay (32) and said shield (34).
8. An electronic apparatus as claimed in claim 3, characterized in that said cooperating latching means (76, 78) on said keyboard module (30) and said housing (20) include cooperating slots (78) and projections (76).
9. An electronic apparatus as claimed in claim 5, characterized in that the securing means (102, 106) for said bezel (36) includes projections (102) on one edge of said bezel (36) cooperable with openings (104) in said housing (20) and latch elements (106) adjacent an opposite edge of said bezel (36) cooperable with retaining elements (108) on said housing (20).
PCT/US1989/002468 1988-06-29 1989-06-06 Electronic apparatus WO1990000304A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US21308088A 1988-06-29 1988-06-29
US213,080 1988-06-29

Publications (1)

Publication Number Publication Date
WO1990000304A1 true WO1990000304A1 (en) 1990-01-11

Family

ID=22793663

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1989/002468 WO1990000304A1 (en) 1988-06-29 1989-06-06 Electronic apparatus

Country Status (3)

Country Link
EP (1) EP0380611A1 (en)
JP (1) JPH03500222A (en)
WO (1) WO1990000304A1 (en)

Cited By (7)

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EP0556011A2 (en) * 1992-02-10 1993-08-18 Canon Kabushiki Kaisha Ink jet recording apparatus
EP0618525A2 (en) * 1993-03-29 1994-10-05 Ing. C. Olivetti & C., S.p.A. Portable electronic computer with removable disk drive
WO1997006517A1 (en) * 1995-08-10 1997-02-20 Siemens Nixdorf Informationssysteme Ag Cash-register
WO1997031346A1 (en) * 1996-02-22 1997-08-28 Siemens Nixdorf Informationssysteme Ag Peripheral assembly kit for the workstation of a goods invoicing system
EP1006544A1 (en) * 1998-09-14 2000-06-07 Alcatel Keypad with individual keys made from transparent plastic
US6206285B1 (en) 1996-10-01 2001-03-27 Siemens Nixdorf Informationssysteme Aktiengesellschaft Peripheral assembly kit for the workstation of a goods invoicing system
FR2821444A1 (en) * 2001-04-10 2002-08-30 Patrice Saleh Compact computer has detachable standard keyboard, compatible PC in box below keyboard, video signal convertor to supply by cable or infra-red an external display consisting of glasses and earphones

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FR2461430A1 (en) * 1979-07-10 1981-01-30 Barda Jean Francis Electrical appts. housing structure - has hinged lid with control circuit secured to underside and input keyboard projecting through access apertures
DE8336889U1 (en) * 1983-12-22 1984-03-29 Siemens AG, 1000 Berlin und 8000 München keyboard
GB2149221A (en) * 1983-11-21 1985-06-05 Lt Terraneo Spa Modular pushbutton board

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Publication number Priority date Publication date Assignee Title
US3978297A (en) * 1975-03-31 1976-08-31 Chomerics, Inc. Keyboard switch assembly with improved pushbutton and associated double snap acting actuator/contactor structure
US4060703A (en) * 1976-11-10 1977-11-29 Everett Jr Seth Leroy Keyboard switch assembly with tactile feedback having illuminated laminated layers including opaque or transparent conductive layer
EP0013318A1 (en) * 1979-01-03 1980-07-23 International Business Machines Corporation Reconfigurable data entry terminal
FR2461430A1 (en) * 1979-07-10 1981-01-30 Barda Jean Francis Electrical appts. housing structure - has hinged lid with control circuit secured to underside and input keyboard projecting through access apertures
GB2149221A (en) * 1983-11-21 1985-06-05 Lt Terraneo Spa Modular pushbutton board
DE8336889U1 (en) * 1983-12-22 1984-03-29 Siemens AG, 1000 Berlin und 8000 München keyboard

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Title
IBM TECHNICAL DISCLOSURE BULLETIN. vol. 29, no. 8, January 1987, NEW YORK US pages 3491 - 3492; armonk: "Acces method for feature expansion" see the whole document *

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0556011A2 (en) * 1992-02-10 1993-08-18 Canon Kabushiki Kaisha Ink jet recording apparatus
EP0556011A3 (en) * 1992-02-10 1994-09-14 Canon Kk Ink jet recording apparatus
US6257701B1 (en) 1992-02-10 2001-07-10 Canon Kabushiki Kaisha Ink jet recording apparatus having an exchangeable ink jet head cartridge mountable thereon and recovery method of said cartridge
US6106097A (en) * 1992-02-10 2000-08-22 Canon Kabushiki Kaisha Ink jet recording apparatus having an exchangeable ink jet head cartridge mountable thereon and recovery method of said cartridge
EP0618525A2 (en) * 1993-03-29 1994-10-05 Ing. C. Olivetti & C., S.p.A. Portable electronic computer with removable disk drive
EP0618525A3 (en) * 1993-03-29 1994-12-14 Olivetti & Co Spa Portable electronic computer with removable disk drive.
US5606519A (en) * 1993-03-29 1997-02-25 Ing. C. Olivetti & C., S.P.A. Portable electronic computer with removable disk drive
US6073838A (en) * 1995-08-10 2000-06-13 Siemens Nixdorf Informationssysteme Ag Cash registers having movable front covers
WO1997006517A1 (en) * 1995-08-10 1997-02-20 Siemens Nixdorf Informationssysteme Ag Cash-register
US6037548A (en) * 1996-02-22 2000-03-14 Siemens Nixdorf Informationssysteme Ag Scales for retail outlets
WO1997031346A1 (en) * 1996-02-22 1997-08-28 Siemens Nixdorf Informationssysteme Ag Peripheral assembly kit for the workstation of a goods invoicing system
US6206285B1 (en) 1996-10-01 2001-03-27 Siemens Nixdorf Informationssysteme Aktiengesellschaft Peripheral assembly kit for the workstation of a goods invoicing system
EP1006544A1 (en) * 1998-09-14 2000-06-07 Alcatel Keypad with individual keys made from transparent plastic
US6207907B1 (en) 1998-09-14 2001-03-27 Alcatel Keypad with individual keys made from transparent plastic
FR2821444A1 (en) * 2001-04-10 2002-08-30 Patrice Saleh Compact computer has detachable standard keyboard, compatible PC in box below keyboard, video signal convertor to supply by cable or infra-red an external display consisting of glasses and earphones

Also Published As

Publication number Publication date
JPH03500222A (en) 1991-01-17
EP0380611A1 (en) 1990-08-08

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