US3622720A - Calculator keyboard cover interlock with a display cover and switch - Google Patents

Calculator keyboard cover interlock with a display cover and switch Download PDF

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Publication number
US3622720A
US3622720A US65111A US3622720DA US3622720A US 3622720 A US3622720 A US 3622720A US 65111 A US65111 A US 65111A US 3622720D A US3622720D A US 3622720DA US 3622720 A US3622720 A US 3622720A
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US
United States
Prior art keywords
cover
power
calculator
movement
switch
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US65111A
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English (en)
Inventor
William A Allen Berkeley
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.)
SCM Corp
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SCM Corp
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Publication date
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Publication of US3622720A publication Critical patent/US3622720A/en
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    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F15/00—Digital computers in general; Data processing equipment in general
    • G06F15/02—Digital computers in general; Data processing equipment in general manually operated with input through keyboard and computation using a built-in program, e.g. pocket calculators
    • G06F15/0216—Constructional details or arrangements
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06C—DIGITAL COMPUTERS IN WHICH ALL THE COMPUTATION IS EFFECTED MECHANICALLY
    • G06C7/00—Input mechanisms
    • G06C7/02—Keyboards
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/16—Constructional details or arrangements
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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
    • H01H2223/00—Casings
    • H01H2223/044—Protecting cover

Definitions

  • the calculator further comprises a calculator power switch mounted for movement between power-on and power-off positions.
  • Means are provided for setting the power switch in the power-on position when the cover means are moved to their uncovering positions, and for setting the power switch in the power-off position when the cover means are moved to their covering positions.
  • Means are also provide to permit manual movement of the power switch between its power-on and its power-off positions when the cover means are located in their uncovering positions.
  • means are further provided for inhibitig manual movement of the power switch from its power-off to its poweron position when the cover means are located in their covering positions.
  • This invention relates generally to electronic calculators, and particularly to relatively small, lightweight electronic calculators or minicalculators" which may easily be carried about from place to place by individual users.
  • Electronic calculators whether or not portable, ordinarily have both an externally accessible keyboard for manual inputs and an externally accessible and visible display panel for readout of calculated results.
  • Calculators designed to be stationed and operated for long periods of time in one location frequently have a protective cover which fits over the keyboard and display panel. When such a calculator is to be used the cover is removed and set aside.
  • Not all stationary electronic calculators have covers though since the risk of damage to the keyboard and display panel may be slight in view of their permanance of location and disposition. Indeed, some calculators are built right into instrument panels, walls and the like. In such cases covers mainly function as dust shields.
  • Minicalculators are designed to be carried about from place to place in the hands, pockets and hand luggage of individual users. In such portable dispositions substantial risk exists of damage to externally accessible operative components of the calculator. Thus, the need for protective covers on minicalculators is great. At the same time however such calculators should preferably remain compact and retain esthetic appeal both with and without their covers. In addition, for manual simplicity and for loss prevention, the cover should remain attached to the calculator in some manner even when positioned to provide accessibility to the components it protects.
  • an object of the present invention to provide an electronic calculator having an externally accessible keyboard and display panel with protective covers attached to the calculator which may be manually positioned so as to cover or expose the keyboard and display panel.
  • Another object of the invention is to provide an electronic calculator having an externally accessible keyboard and luminous display panel withprotective covers which may be manually located so as to completely cover the keyboard and luminous display panel in one position, and which may also be manually located in another position so as to completely expose the keyboard and luminous display panel, and to expose the latter in such a manner that it remains, while so exposed and electrically illuminated, sufficiently shielded from ambient light as to provide good viewing contrast.
  • Another object of the invention is to provide an electronic calculator having an externally accessible keyboard and display panel with a protective cover thereover which may be moved so as to expose the keyboard and display panel and in so moving switch on electrical power to the calculator.
  • Yet another object of the invention is to provide an electronic calculator having a manually operated power on-ofi switch, an externally accessible keyboard and display panel, and protective cover means which may be moved from a position covering the keyboard and display panel to a position exposing them and in so moving switch an electric power to the calculator; and which cover means may also be moved from a position exposing the keyboard and display panel to a position covering them and in so moving switch off electric power to the calculator and also render the power on-ofi' switch incapable of switching on the power to the calculator when the keyboard and display panel are so covered.
  • the present invention is an electronic calculator comprising an input keyboard panel, an output display panel, and first and second cover means mounted for movement between positions covering and positions uncovering the panels.
  • the calculator further comprises a calculator power switch mounted for movement between power-on and poweroff positions.
  • Means are provided for setting the power switch in the power-on position when the cover means are moved to their uncovering positions, and for setting the power switch in the power-off position when the cover means are moved to their covering positions.
  • Means are also provided to permit manual movement of the power switch between its power-on and its power-off positions when the cover means are located in their uncovering positions.
  • Means are further provided for inhibiting manual movement of the power switch from its power-off to its power-on position when the cover means are located in their covering positions.
  • FIG. 1 is a perspective view of an electronic calculator having a cover interlock mechanism in accordance with principles of the present invention and in which protective covers are positioned so as to cover the calculator keyboard and display panel.
  • FIG. 2 is another perspective view of the calculator shown in FIG. 1 in which protective covers are positioned so as to uncover and expose the calculator keyboard and display panel.
  • FIG. 3 is an elevational view, partly in cross section, of a preferred embodiment of the cover interlock mechanism having its components located in the relative positionsthey occupy when the calculator covers are positioned in their covering positions as shown in FIG. I.
  • FIG. 4 is an elevational view, partly in cross section, of the cover interlock mechanism shown in FIG. 3 but with its components located in the relative positions they occupy when the calculator covers are positioned in their uncovering positions as shown in FIG. 2.
  • FIG. 5A, SB and 5C are three sequentially positioned fragmentary plan views of selected components of the cover interlock mechanism shown in FIGS. 3 and 4.
  • FIG. 1 a relatively small, portable, electronic calculator having a top panel 10, a keyboard cover 11 adapted to slide over top panel 10, a rotatable covering hood 12, a fixed battery cover 13, an on-off power switch rocking member 14.
  • Keyboard cover 11 may be manually slid over panel 10 to the position shown in FIG. 2 to expose keyboard 16 which comprises a set of individual keys bearing information indicia as shown.
  • hood 12 is caused to be rotated clockwise by linking means hereinafter described.
  • hood I2 could be mounted for linear movement through the use of a standard rack and pinion gear assembly.
  • hood 12 is so raised as to reveal luminous display panel 17.
  • the display panel comprises a set of Nixie tubes each of which may be energized to radiate a digital light image out from hood 12 above the keyboard where it may be observed by the calculator operator.
  • hood sideplates l8 restricts the entrance of ambient light to the display panel as does the hood itself in this position in order to shade the panel to provide good luminous contrast for ease of viewing.
  • rocking member 14 In sliding keyboard cover 11 from the close position of FIG. 1 to the open position of FIG. 2 rocking member 14 is moved to the power on position. Thus, with one manual movement the calculator keyboard is uncovered, the luminous display panel is also uncovered, and the calculator power is turned on. In sliding keyboard cover 11 from the open position of FIG. 2 back to the closed position of FIG. 1 the keyboard and display panel are covered, the display panel is cleared, and the calculator power turned off. In the open position of FIG. 2 on-off power switch rocking member 14 may be manually moved to shut off power to the calculator. However, the reverse in inhibited when the cover is in the closed position of FIG. 1 in order to prevent accidental consumption of power when the calculator is not in a manually operative position.
  • FIG. 3 illustrates a cover interlock mechanism which may be housed within the calculator and utilized in achieving the above-described functions in accordance with principles of the present invention.
  • Keyboard cover 11 has two outwardly projecting pins E and F which lie within a recess in he calculator side frame which recess forms guide track 22.
  • a similar pair may be present on the opposite side of the cover, but the description will be given with respect to one side only, for brevity.
  • Display covering hood 12 is mounted to the calculator frame to rotate about pivot point 0.
  • Bellcrank 23, which is rotatably mounted to the calculator frame by pivot pin B, has a recess at one end thereof in which resides pin C which projects from hood 12,
  • the opposite end of bellcrank 23 has an elongated recess forming camlike surfaces 24 of the bellcrank.
  • Pin F is clear oflips 32 of surfaces 24 when keyboard cover 11 is located in the position shown in FIG. 1 which corresponds to the relative position of the components of the mechanism shown in FIG. 3.
  • the calculator power switch is seen to comprise rocking member 14 which may be rocked on pin A to opposite detented positions and, in doing so, alternately depress and release actuator 25 of microswitch 26.
  • rocking member 14 To the base of rocking member 14 there is attached a switch arm member 27. From the lower portion of the switch arm member extend upper finger 28 and lower finger 29. Lower finger 29 is rigid; however, upper finger 28 is flexible in the direction normal to the drawing.
  • pin D mounted on hood 12
  • Rocking member 14 is here positioned so as not to depress microswitch actuator 25 which would serve to turn on the power onto the electronic calculator.
  • rocking member 14 cannot be rotated counterclockwise to turn power on since finger 29 would engage pin D, and the leverage is such that normal forces will not be sufficient to overcome frictional resistance.
  • a cover detent spring could be added.
  • An electronic calculator comprising an input keyboard panel, an output display panel, first and second cover means mounted for movement between positions covering and positions uncovering said panels, a calculator power switch mounted to said calculator for movement between power-on and power-off positions, means for setting said switch in said power-on position when said cover means are moved to said uncovering positions and for setting said power switch in said power-off position when said cover means are moved to said covering positions, means for permitting manual movement of said power switch between said power-on and power-off positions when said cover means are located in said uncovering positions and for inhibiting manual movement of said power switch from said power-off to said power-on position when said cover means are located in said covering positions.
  • An electronic calculator in accordance with claim 1 comprising linking means connecting said first and second cover means.
  • An electronic calculator comprising a rotatably mounted cover having a projection affixed thereto and an externally accessible power on-off switch, said power on-off switch comprising a rocking member mounted for movement in a discrete plane of motion, said switch rocking member having a flexible member affixed thereto located adjacent said projection with said flexible member being yieldable in directions substantially normal to said discrete plane of motion beyond an end of said projection, said flexible member having a leading surface beveled with respect to said discrete plane of motion and to a surface of said projection located adjacent said flexible member.
  • said power on-off switch further comprises a switch actuator located adjacent said rocking member in said discrete plane of motion whereby said actuator may be depressed and released as said rocking member is moved in said discrete plane of motion into and out of contact with said switch ac tuator.
  • rocking member has a planar surface disposed substantially normal said discrete plane of motion and said flexible member has a planar surface also disposed substantially normal said discrete plane of motion, said two planar surfaces being spaced from one another and located substantially opposed to and parallel with one another in juxtaposed relation with said cover projection locatable between said two planar surfaces by movement of said rotatably mounted cover.
  • An electronic calculator in accordance with claim 8 comprising a-second cover mounted for planar movement and linking means pivotably mounted to the calculator in contact with said rotatably mounted cover and said second cover whereby planar movement of saidsecond cover may cause rotational movement of said rotatably mounted cover.
  • An electronic calculator comprising a keyboard, a keyboard cover, a visual display panel, a visual display panel cover;linking means between said keyboard cover and said visual display panel cover to cause movement of said visual display panel cover with respect to said visual display panel upon movement of said keyboard cover with respect to said keyboard, and a power on-off switch comprising a pivotable member having a surface disposed for external. manual accessibility and a flexible finger member located adjacent said visual display panel and affixed to said pivotable member.
  • said visual display cover has a projection located adjacent said flexible finger member at a distance from the axis about which said visual display cove pivots greater than the distance from which said flexible finger member is located from the axis about which said pivotable member pivots.

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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Computing Systems (AREA)
  • Computer Hardware Design (AREA)
  • Human Computer Interaction (AREA)
  • Calculators And Similar Devices (AREA)
  • Input From Keyboards Or The Like (AREA)
  • Power Sources (AREA)
US65111A 1970-08-19 1970-08-19 Calculator keyboard cover interlock with a display cover and switch Expired - Lifetime US3622720A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US6511170A 1970-08-19 1970-08-19

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US (1) US3622720A (de)
AR (1) AR197289A1 (de)
AU (1) AU3057871A (de)
CA (1) CA945190A (de)
CH (1) CH531754A (de)
DD (1) DD98384A5 (de)
DE (1) DE2131511A1 (de)
GB (1) GB1331169A (de)

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0004683A3 (en) * 1978-04-10 1979-10-31 Braun Aktiengesellschaft Protective box for electrical apparatus
US4273956A (en) * 1977-10-03 1981-06-16 Jag International Sales Limited Audioscope project
US4404643A (en) * 1980-02-27 1983-09-13 Hosiden Electronics Co. Portable electronic calculator with a writing instrument
EP0178800A3 (de) * 1984-09-19 1987-10-14 Data General Corporation Tragbarer Rechner
JPH0535371A (ja) * 1992-01-09 1993-02-12 Toshiba Corp 携帯型電子機器
US5350894A (en) * 1993-06-28 1994-09-27 Ford Motor Company Two piece switch assembly for members that move relative to one another in a fixed manner
US5398023A (en) * 1990-08-27 1995-03-14 Motorola, Inc. Selective call receiver with flip-out display
DE19529454C1 (de) * 1995-08-10 1997-02-20 Ibm Eingabe von Daten mittels einer Tastatur und einem graphischen Dateneingabefeld
US5932855A (en) * 1997-04-08 1999-08-03 Inventec Corporation Composite actuating device
US5949039A (en) * 1997-10-20 1999-09-07 Eastman Kodak Company Service door interlock
US6151012A (en) * 1995-11-16 2000-11-21 Bullister; Edward Multifunctional portable computing device with special housing
USD438868S1 (en) 1999-02-12 2001-03-13 Sony Corporation Keyboard cover
US6256017B1 (en) * 1994-02-24 2001-07-03 Edward T. Bullister Collapsible keyboard and display mechanism for a computer system
US6697055B1 (en) 1995-11-16 2004-02-24 Edward Bullister Multifunctional portable computing device with special housing
WO2005109150A3 (de) * 2004-05-10 2006-04-06 Siemens Ag Schutzeinrichtung
US20070136405A1 (en) * 2005-12-09 2007-06-14 Weinstein Marc C Multi-panel sliding cover for a device
WO2006102541A3 (en) * 2005-03-23 2007-06-28 Marc Chase Weinstein Device having a slidable cover
US20070285880A1 (en) * 2005-03-23 2007-12-13 Weinstein Marc C Device Having a Slidable Cover
US20090072185A1 (en) * 2001-07-31 2009-03-19 Jds Uniphase Corporation Anisotropic Magnetic Flakes
US20090178908A1 (en) * 2008-01-16 2009-07-16 Nihon Kohden Corporation Switch structure of automatic external defibrillator

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1980000885A1 (en) * 1978-10-23 1980-05-01 H Lowenthal Writing board
DE2846787B1 (de) * 1978-10-27 1979-08-30 Kienzle Apparate Gmbh Bedientisch fuer eine Datenverarbeitungsanlage
DE3119209A1 (de) * 1981-05-14 1982-12-09 Robert Bosch Gmbh, 7000 Stuttgart "tragbares mobiles datenterminal"
US4571456B1 (en) * 1982-10-18 1995-08-15 Grid Systems Corp Portable computer

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2800543A (en) * 1956-02-27 1957-07-23 Herzog Michael David Safety goggle switch actuator
US2921153A (en) * 1958-04-01 1960-01-12 Electrolux Ab Vacuum cleaner
US3384722A (en) * 1966-03-08 1968-05-21 Olympia Werke Ag Safety switch lock
US3496316A (en) * 1968-09-17 1970-02-17 Amana Refrigeration Inc Start and stop switch actuating pushbuttons interlocked with a door

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2800543A (en) * 1956-02-27 1957-07-23 Herzog Michael David Safety goggle switch actuator
US2921153A (en) * 1958-04-01 1960-01-12 Electrolux Ab Vacuum cleaner
US3384722A (en) * 1966-03-08 1968-05-21 Olympia Werke Ag Safety switch lock
US3496316A (en) * 1968-09-17 1970-02-17 Amana Refrigeration Inc Start and stop switch actuating pushbuttons interlocked with a door

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4273956A (en) * 1977-10-03 1981-06-16 Jag International Sales Limited Audioscope project
EP0004683A3 (en) * 1978-04-10 1979-10-31 Braun Aktiengesellschaft Protective box for electrical apparatus
US4404643A (en) * 1980-02-27 1983-09-13 Hosiden Electronics Co. Portable electronic calculator with a writing instrument
EP0178800A3 (de) * 1984-09-19 1987-10-14 Data General Corporation Tragbarer Rechner
US5398023A (en) * 1990-08-27 1995-03-14 Motorola, Inc. Selective call receiver with flip-out display
JPH0535371A (ja) * 1992-01-09 1993-02-12 Toshiba Corp 携帯型電子機器
US5350894A (en) * 1993-06-28 1994-09-27 Ford Motor Company Two piece switch assembly for members that move relative to one another in a fixed manner
US6256017B1 (en) * 1994-02-24 2001-07-03 Edward T. Bullister Collapsible keyboard and display mechanism for a computer system
US6587096B2 (en) * 1994-02-24 2003-07-01 Edward T. Bullister Collapsible portable electronic device with display
DE19529454C1 (de) * 1995-08-10 1997-02-20 Ibm Eingabe von Daten mittels einer Tastatur und einem graphischen Dateneingabefeld
US6151012A (en) * 1995-11-16 2000-11-21 Bullister; Edward Multifunctional portable computing device with special housing
US6697055B1 (en) 1995-11-16 2004-02-24 Edward Bullister Multifunctional portable computing device with special housing
US20040164965A1 (en) * 1995-11-16 2004-08-26 Edward Bullister Multifunctional portable computing device with special housing
US7193614B2 (en) 1995-11-16 2007-03-20 Edward Bullister Multifunctional portable computing device with special housing
US5932855A (en) * 1997-04-08 1999-08-03 Inventec Corporation Composite actuating device
US5949039A (en) * 1997-10-20 1999-09-07 Eastman Kodak Company Service door interlock
USD438868S1 (en) 1999-02-12 2001-03-13 Sony Corporation Keyboard cover
US20090072185A1 (en) * 2001-07-31 2009-03-19 Jds Uniphase Corporation Anisotropic Magnetic Flakes
WO2005109150A3 (de) * 2004-05-10 2006-04-06 Siemens Ag Schutzeinrichtung
WO2006102541A3 (en) * 2005-03-23 2007-06-28 Marc Chase Weinstein Device having a slidable cover
US20070285880A1 (en) * 2005-03-23 2007-12-13 Weinstein Marc C Device Having a Slidable Cover
US7414830B2 (en) * 2005-03-23 2008-08-19 Marc Chase Weinstein Device having a slidable cover
JP2008535059A (ja) * 2005-03-23 2008-08-28 ウェインスタイン，マーク・チェイス 褶動可能なカバーを有する装置
US20070136405A1 (en) * 2005-12-09 2007-06-14 Weinstein Marc C Multi-panel sliding cover for a device
US8289687B2 (en) 2005-12-09 2012-10-16 Marc Chase Weinstein Multi-panel sliding cover for a device
US20090178908A1 (en) * 2008-01-16 2009-07-16 Nihon Kohden Corporation Switch structure of automatic external defibrillator
US7663069B2 (en) * 2008-01-16 2010-02-16 Nihon Kohden Corporation Switch structure of automatic external defibrillator

Also Published As

Publication number Publication date
DD98384A5 (de) 1973-06-12
GB1331169A (en) 1973-09-26
AR197289A1 (es) 1974-03-29
CH531754A (de) 1972-12-15
DE2131511A1 (de) 1972-02-24
AU3057871A (en) 1974-01-04
CA945190A (en) 1974-04-09

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