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US3906814A - Keyboard key lock mechanism - Google Patents

Keyboard key lock mechanism Download PDF

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Publication number
US3906814A
US3906814A US409831A US40983173A US3906814A US 3906814 A US3906814 A US 3906814A US 409831 A US409831 A US 409831A US 40983173 A US40983173 A US 40983173A US 3906814 A US3906814 A US 3906814A
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United States
Prior art keywords
key
keyboard
mounting plate
stem
stem section
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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
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US409831A
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Rolf I Magnussen
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Individual
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Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05G—CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
    • G05G5/00—Means for preventing, limiting or returning the movements of parts of a control mechanism, e.g. locking controlling member
    • G05G5/005—Means for preventing, limiting or returning the movements of parts of a control mechanism, e.g. locking controlling member for preventing unintentional use of a control mechanism
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/20—Interlocking, locking, or latching mechanisms
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B2200/00—Constructional details of connections not covered for in other groups of this subclass
    • F16B2200/69—Redundant disconnection blocking means
    • F16B2200/71—Blocking disengagement of catches or keys
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/20—Control lever and linkage systems
    • Y10T74/20207—Multiple controlling elements for single controlled element
    • Y10T74/20238—Interlocked
    • Y10T74/20244—Push button
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/20—Control lever and linkage systems
    • Y10T74/20576—Elements
    • Y10T74/20636—Detents
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/20—Control lever and linkage systems
    • Y10T74/20576—Elements
    • Y10T74/20636—Detents
    • Y10T74/20648—Interrelated lever release

Definitions

  • ABSTRACT A lock mechanism for preventing the accidental depressing of a keyboard key.
  • the mechanism comprises a stem adapted to fit through an aperture in the keyboard mounting plate, a return spring extending between the bottom of the mounting plate and the bottom of the stem for resiliently urging the key stem into a position normal to the mounting plate, and a locking key having on one side surface a latch adapted to fit beneath the edge of the adjacent keyboard key.
  • the latch therefore. prevents accidental depressing of the key until the operator first releases the locking keyv
  • a computer input keyboard consists of a main keyboard for inserting data and a control keyboard containing function keys which, when actuated, will direct the computer to perform certain operations on the inserted data.
  • the invention disclosed herein comprises a simple and inexpensive locking mechanism provided with a latch that fits under the adjacent function key to prevent the depressing of that key until the locking mechanism is actuated.
  • FIG. 1 is a perspective drawing illustrating a section of a typical keyboard containing the locking mechamsm; 7
  • FIG. 2 is an elevation view taken along the line 2-2 of FIG. 1 and illustrates the locking mechanism and the associated keyboard key;
  • FIG. 3 is another side elevation view showing the actuation of a key after release of the locking mechanism.
  • FIG. 4 is an elevation view of the locking mechanism taken along the lines 44 of the FIG. 2.
  • FIG. 1 illustrates a portion of a keyboard which may, for example, be part of an input terminal to a computer. It is assumed that the keys illustrated may comprise a portion of the function key section of a keyboard and it may be assumed that key 12 may be used, for example, to instruct the com puter to clear a particular program. It is quite apparent, therefore, that any accidental depressing of key I2 may produce disasterous results and it is, therefore. necessary to provide key 12 with a lock 14 which will prevent inadvertent actuation of key 12.
  • FIG. 2 is an elevation view illustrating the details of key 12 and its associated lock 14.
  • the key I2 may be a keyboard component such as described in U.S. Pat.
  • mounting plate 20 is comprised of a resilient cushioning layer 24, supported by a carbon steel core 26 under which is a resilient spacing layer 28 provided to reduce key noise and to improve the touch of the key by decreasing break-away force.
  • a small bar magnet 30 Affixed to key stem I6 and normally abutted against spacing layer 28 is a small bar magnet 30 which, when key 12 is depressed, will actuate a reed switch 32 that is coupled to the appropriate circuitry to perform the necessary function directed by the actuation of key 12.
  • Lock I4 is comprised of a key 36 extending above mounting plate 20 and a lock stem 38 connected to the lower end of key 36 and extending through an aperture in mounting plate 20.
  • a return spring 40 extends between the lower end of stem 38 and mounting plate 20 to urge the stem and locking key 36 into a position perpendicular to the mounting plate 20.
  • Key 36 of lock I4 is provided with a latch 42 which comprises a small step section perpendicular to the longitudinal axis of key 36 and stem 38, and underlying the bottom surface of key 12 so that key 12 will rest upon latch 42. Function key 12 is thus locked and its accidental actuation is prevented.
  • function key 12 To actuate function key 12, it is first necessary to tilt locking key 36 so that latch 42 is released from the bottom of function key 12 and is best shown in FIG. 3. After release of latch 42, function key 12 may be depressed. When key 36 is released, and function key 12 is permitted to return up to its nonactuated position, return spring 40 will urge latch 42 back into its locking position.
  • Return spring 40 extends between the lower surface of mounting plate 20 and the lower end of stem 38.
  • Spring 40 may be affixed to the lower end of stem 38 by a pin (not shown) having a length larger than the diameter of spring 40 and extending through the lower end of stem 38; however, the preferred method of mounting spring 40 is by providing threads 44 formed in the stem at the lower end 46 of stem 38 as best shown in FIG. 4.
  • lower end 46 of stem 38 is constructed slightly wider than the midsection 48 of the stern and the lower end is provided with grooves that act threads upon which spring 40 may be screwed and supported as shown in FIG. 4.
  • a lock mechanism for preventing inadvertent actuation of said key comprising:
  • a manually actuable locking key positioned adjacent the keyboard key
  • said latch on said locking key, said latch having a step surface substantially perpendicular to the longitudinal axis of said stem section and positioned to engage said keyboard key when said stem section is positioned perpendicular to said mounting plate.
  • said resilient means is a coil spring positioned between said mounting plate at the end of said stem section opposite said locking key.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Input From Keyboards Or The Like (AREA)

Abstract

A lock mechanism for preventing the accidental depressing of a keyboard key. The mechanism comprises a stem adapted to fit through an aperture in the keyboard mounting plate, a return spring extending between the bottom of the mounting plate and the bottom of the stem for resiliently urging the key stem into a position normal to the mounting plate, and a locking key having on one side surface a latch adapted to fit beneath the edge of the adjacent keyboard key. The latch, therefore, prevents accidental depressing of the key until the operator first releases the locking key. With the rapid development and greatly increased use of digital computing equipment, there is a corresponding increase in the use of keyboard equipment by which an operator may communicate with the computer. Normally, a computer input keyboard consists of a main keyboard for inserting data and a control keyboard containing function keys which, when actuated, will direct the computer to perform certain operations on the inserted data. The accidental actuation of certain function keys may produce disasterous results. For example, a computer that has been programmed to perform a certain operation may have a function key which, when depressed, will clear the entire program. It is apparent that it is most desirable that such a function key should be equipped with some means of preventing its accidental actuation.

Description

United States Patent 1 Magnussen [111 Ftflfidfid 1 Sept. 23, 1975 1 KEYBOARD KEY LOCK MECHANISM [76] Inventor: Rolf I. Magnussen, 1954 Alvardo St, San Leandro, Calif. 94577 [22] Filed: Oct. 26, 1973 [21] Appl. No.: 409,831
[52] US. Cl 74/483 PB; 74/527; 74/529; 403/319; 2.35/27 [51] Int. Cl GOSg 11/00 [58] Field of Search 74/483 PB, 502, 503, 527, 74/528, 529, 531, 532; 403/315, 319; 235/26, 27,59 T. 123, 130 KD, 131 FD; 360/60 [56] References Cited UNITED STATES PATENTS 2,917,944 12/1959 Hills 74/529 X Primary Examiner-Benjamin W. Wyche Assistant ExaminerFrank H. McKenzie, Jr. Attorney, Agent, or FirmEdward L. Bell [57] ABSTRACT A lock mechanism for preventing the accidental depressing of a keyboard key. The mechanism comprises a stem adapted to fit through an aperture in the keyboard mounting plate, a return spring extending between the bottom of the mounting plate and the bottom of the stem for resiliently urging the key stem into a position normal to the mounting plate, and a locking key having on one side surface a latch adapted to fit beneath the edge of the adjacent keyboard key. The latch, therefore. prevents accidental depressing of the key until the operator first releases the locking keyv With the rapid development and greatly increased use of digital computing equipment. there is a corresponding increase in the use of keyboard equipment by which an operator may communicate with the computer. Normally. a computer input keyboard consists of a main keyboard for inserting data and a control keyboard containing function keys which, when actuated, will direct the computer to perform certain operations on the inserted data.
The accidental actuation of certain function keys may produce disasterous results. For example, a computer that has been programmed to perform a certain operation may have a function key which, when depressed, will clear the entire program. It is apparent that it is most desirable that such a function key should be equipped with some means of preventing its accidental actuation.
4 Claims, 4 Drawing Figures US Patent Sept. 23,1975
KEYBOARD KEY LOCK MECHANISM The invention disclosed herein comprises a simple and inexpensive locking mechanism provided with a latch that fits under the adjacent function key to prevent the depressing of that key until the locking mechanism is actuated.
In the drawings which illustrate a preferred embodiment of the invention:
FIG. 1 is a perspective drawing illustrating a section of a typical keyboard containing the locking mechamsm; 7
FIG. 2 is an elevation view taken along the line 2-2 of FIG. 1 and illustrates the locking mechanism and the associated keyboard key;
FIG. 3 is another side elevation view showing the actuation of a key after release of the locking mechanism; and
FIG. 4 is an elevation view of the locking mechanism taken along the lines 44 of the FIG. 2.
Turning now to a description of the preferred embodiment of the invention, FIG. 1 illustrates a portion of a keyboard which may, for example, be part of an input terminal to a computer. It is assumed that the keys illustrated may comprise a portion of the function key section of a keyboard and it may be assumed that key 12 may be used, for example, to instruct the com puter to clear a particular program. It is quite apparent, therefore, that any accidental depressing of key I2 may produce disasterous results and it is, therefore. necessary to provide key 12 with a lock 14 which will prevent inadvertent actuation of key 12.
FIG. 2 is an elevation view illustrating the details of key 12 and its associated lock 14. The key I2 may be a keyboard component such as described in U.S. Pat.
No. 3,693,123, comprising a key stem 16 mounted between a lower base member 18 and a mounting plate 20 and normally maintained in a non-actuated or rest position by a return spring 22. As explained in detail in the above-referenced patent. mounting plate 20 is comprised of a resilient cushioning layer 24, supported by a carbon steel core 26 under which is a resilient spacing layer 28 provided to reduce key noise and to improve the touch of the key by decreasing break-away force.
Affixed to key stem I6 and normally abutted against spacing layer 28 is a small bar magnet 30 which, when key 12 is depressed, will actuate a reed switch 32 that is coupled to the appropriate circuitry to perform the necessary function directed by the actuation of key 12.
In order to prevent accidental actuation of key 12, a lock 14 is provided. Lock I4 is comprised of a key 36 extending above mounting plate 20 and a lock stem 38 connected to the lower end of key 36 and extending through an aperture in mounting plate 20. A return spring 40 extends between the lower end of stem 38 and mounting plate 20 to urge the stem and locking key 36 into a position perpendicular to the mounting plate 20.
Key 36 of lock I4 is provided with a latch 42 which comprises a small step section perpendicular to the longitudinal axis of key 36 and stem 38, and underlying the bottom surface of key 12 so that key 12 will rest upon latch 42. Function key 12 is thus locked and its accidental actuation is prevented.
To actuate function key 12, it is first necessary to tilt locking key 36 so that latch 42 is released from the bottom of function key 12 and is best shown in FIG. 3. After release of latch 42, function key 12 may be depressed. When key 36 is released, and function key 12 is permitted to return up to its nonactuated position, return spring 40 will urge latch 42 back into its locking position.
Return spring 40 extends between the lower surface of mounting plate 20 and the lower end of stem 38. Spring 40 may be affixed to the lower end of stem 38 by a pin (not shown) having a length larger than the diameter of spring 40 and extending through the lower end of stem 38; however, the preferred method of mounting spring 40 is by providing threads 44 formed in the stem at the lower end 46 of stem 38 as best shown in FIG. 4. Thus, lower end 46 of stem 38 is constructed slightly wider than the midsection 48 of the stern and the lower end is provided with grooves that act threads upon which spring 40 may be screwed and supported as shown in FIG. 4.
What is claimed is:
I. In combination with a manual keyboard key depressible perpendicularly to a keyboard mounting plate, a lock mechanism for preventing inadvertent actuation of said key, said lock mechanism comprising:
a manually actuable locking key positioned adjacent the keyboard key;
a stem section connected to said locking key and extending through an aperture in the keyboard mounting plate;
resilient means coupled to the end of said stem section opposite to said locking key for urging said stem section into a position perpendicular to said mounting plate; and
a latch on said locking key, said latch having a step surface substantially perpendicular to the longitudinal axis of said stem section and positioned to engage said keyboard key when said stem section is positioned perpendicular to said mounting plate.
2. The combination claimed in claim I wherein said resilient means is a coil spring positioned between said mounting plate at the end of said stem section opposite said locking key.
3. The combination claimed in claim 2 wherein said stem section has, on the end opposite said locking key, a threaded portion adapted to engage a portion of said coil spring.
4. The combination claimed in claim I wherein the step surface on said latch engages said keyboard key by underlying the bottom surface of said key when said stem section is positioned perpendicular to said mounting plate.

Claims (4)

1. In combination with a manual keyboard key depressible perpendicularly to a keyboard mounting plate, a lock mechanism for preventing inadvertent actuation of said key, said lock mechanism comprising: a manually actuable locking key positioned adjacent the keyboard key; a stem section connected to said locking key and extending through an aperture in the keyboard mounting plate; resilient means coupled to the end of said stem section opposite to said locking key for urging said stem section into a position perpendicular to said mounting plate; and a latch on said locking key, said latch having a step surface substantially perpendicular to the longitudinal axis of said stem section and positioned to engage said keyboard key when said stem section is positioned perpendicular to said mounting plate.
2. The combination claimed in claim 1 wherein said resilient means is a coil spring positioned between said mounting plate at the end of said stem section opposite said locking key.
3. The combination claimed in claim 2 wherein said stem section has, on the end opposite said locking key, a threaded portion adapted to engage a portion of said coil spring.
4. The combination claimed in claim 1 wherein the step surface on said latch engages said keyboard key by underlying the bottom surface of said key when said stem section is positioned perpendicular to said mounting plate.
US409831A 1973-10-26 1973-10-26 Keyboard key lock mechanism Expired - Lifetime US3906814A (en)

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Cited By (38)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4820887A (en) * 1988-05-02 1989-04-11 Honeywell Inc. Membrane keyboard blockout apparatus
US5129282A (en) * 1991-07-24 1992-07-14 Dawn Equipment Company Mechanism for selectively repositioning a farm implement
US5638945A (en) * 1996-06-10 1997-06-17 Ryobi North America, Inc. Locking trigger mechanism for a portable power tool
US6768428B1 (en) 2002-03-27 2004-07-27 Blaine C. Readler Computer keyboard lock
US20050237230A1 (en) * 2002-09-05 2005-10-27 Somfy Sas Method of disabling the keyboard keys of a command-emitting device
US20070211030A1 (en) * 2006-03-08 2007-09-13 Hon Hai Precision Industry Co., Ltd. Mouse device with keys
US20080050167A1 (en) * 2006-08-22 2008-02-28 Dohan Designs Keyboard guard apparatus and system
US20080069625A1 (en) * 2006-08-22 2008-03-20 Dohan Jewel L Keyboard guard apparatus and system
US20100134329A1 (en) * 2008-11-28 2010-06-03 Shun-Lung Wang Keyboard Module for Avoiding Accidental Operation
CN102222582A (en) * 2010-04-14 2011-10-19 鸿富锦精密工业（深圳）有限公司 Electronic device with buttons capable of preventing misoperation
US20120186952A1 (en) * 2011-01-12 2012-07-26 Masaya Hatano Switch with locking mechanism
US8330584B1 (en) 2009-07-16 2012-12-11 John Pfanstiehl Remote control with lockable keys
US8327780B2 (en) 2009-10-16 2012-12-11 Dawn Equipment Company Agricultural implement having fluid delivery features
US8359988B2 (en) 2007-07-24 2013-01-29 Dawn Equipment Company Agricultural tillage device
US8544397B2 (en) 2010-09-15 2013-10-01 Dawn Equipment Company Row unit for agricultural implement
US8544398B2 (en) 2010-09-15 2013-10-01 Dawn Equipment Company Hydraulic down pressure control system for closing wheels of an agricultural implement
US8636077B2 (en) 2012-05-22 2014-01-28 Dawn Equipment Company Agricultural tool with structural housing for hydraulic actuator
US8763713B2 (en) 2012-01-27 2014-07-01 Dawn Equipment Company Agricultural implement with automatic down pressure control
US8776702B2 (en) 2010-09-15 2014-07-15 Dawn Equipment Company Hydraulic down pressure control system for an agricultural implement
US8863857B2 (en) 2011-02-23 2014-10-21 Dawn Equipment Company Row unit for agricultural implement
US8910581B2 (en) 2012-07-25 2014-12-16 Dawn Equipment Company Side dressing fertilizer coulter
US8985232B2 (en) 2012-08-20 2015-03-24 Dawn Equipment Company Agricultural apparatus for sensing and providing feedback of soil property changes in real time
US9055712B2 (en) 2010-09-15 2015-06-16 Dawn Equipment Company Agricultural apparatus with integrated controller for a row unit
US9192091B2 (en) 2013-02-01 2015-11-24 Dawn Equipment Company Agricultural apparatus with hybrid single-disk, double-disk coulter arrangement
US9746007B2 (en) 2012-07-25 2017-08-29 Precision Planting Llc Integrated implement downforce control systems, methods, and apparatus
US20170329367A1 (en) * 2016-05-10 2017-11-16 Fu Tai Hua Industry (Shenzhen) Co., Ltd. Assembly for preventing unexpected shutdown and electronic device with the same
US10251333B2 (en) 2014-11-07 2019-04-09 Dawn Equipment Company Agricultural system
US10444774B2 (en) 2014-11-07 2019-10-15 Dawn Equipment Company Agricultural system
US10506755B2 (en) 2010-09-15 2019-12-17 Dawn Equipment Company Agricultural systems
US10582653B2 (en) 2014-11-07 2020-03-10 Dawn Equipment Company Agricultural planting system with automatic depth control
US10721855B2 (en) 2014-02-05 2020-07-28 Dawn Equipment Company Agricultural system for field preparation
US10806064B2 (en) 2011-07-01 2020-10-20 Charles H. Martin Agricultural field preparation device
US10834863B2 (en) 2011-08-05 2020-11-17 Precision Planting Llc Apparatus, systems and methods for row unit downforce control
CN112262099A (en) * 2018-03-30 2021-01-22 雷亚迪明碧提公司,以碧提布兰德公司名义营业 Container and dispenser system and device
US10980174B2 (en) 2015-12-28 2021-04-20 Underground Agriculture, LLC Agricultural mowing device
US11006563B2 (en) 2017-05-04 2021-05-18 Dawn Equipment Company Seed firming device for improving seed to soil contact in a planter furrow with feature designed to prevent the buildup of soil on the outer surfaces by discharging pressurized fluid
US11083134B2 (en) 2015-12-28 2021-08-10 Underground Agriculture, LLC Agricultural inter-row mowing device
US11197411B2 (en) 2014-11-07 2021-12-14 Dawn Equipment Company Agricultural planting system with automatic depth control

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2917944A (en) * 1955-08-31 1959-12-22 Rca Corp Control means

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2917944A (en) * 1955-08-31 1959-12-22 Rca Corp Control means

Cited By (62)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4820887A (en) * 1988-05-02 1989-04-11 Honeywell Inc. Membrane keyboard blockout apparatus
US5129282A (en) * 1991-07-24 1992-07-14 Dawn Equipment Company Mechanism for selectively repositioning a farm implement
US5638945A (en) * 1996-06-10 1997-06-17 Ryobi North America, Inc. Locking trigger mechanism for a portable power tool
US6768428B1 (en) 2002-03-27 2004-07-27 Blaine C. Readler Computer keyboard lock
US20050237230A1 (en) * 2002-09-05 2005-10-27 Somfy Sas Method of disabling the keyboard keys of a command-emitting device
US7256726B2 (en) 2002-09-05 2007-08-14 Somfy Sas Method of disabling the keyboard keys of a command-emitting device
US7746322B2 (en) * 2006-03-08 2010-06-29 Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd. Mouse device with keys
US20070211030A1 (en) * 2006-03-08 2007-09-13 Hon Hai Precision Industry Co., Ltd. Mouse device with keys
US20080069625A1 (en) * 2006-08-22 2008-03-20 Dohan Jewel L Keyboard guard apparatus and system
US20080050167A1 (en) * 2006-08-22 2008-02-28 Dohan Designs Keyboard guard apparatus and system
US8359988B2 (en) 2007-07-24 2013-01-29 Dawn Equipment Company Agricultural tillage device
US20100134329A1 (en) * 2008-11-28 2010-06-03 Shun-Lung Wang Keyboard Module for Avoiding Accidental Operation
US8305241B2 (en) * 2008-11-28 2012-11-06 Asustek Computer Inc. Keyboard module for avoiding accidental operation
US8330584B1 (en) 2009-07-16 2012-12-11 John Pfanstiehl Remote control with lockable keys
US8327780B2 (en) 2009-10-16 2012-12-11 Dawn Equipment Company Agricultural implement having fluid delivery features
CN102222582A (en) * 2010-04-14 2011-10-19 鸿富锦精密工业（深圳）有限公司 Electronic device with buttons capable of preventing misoperation
US20110253518A1 (en) * 2010-04-14 2011-10-20 Hon Hai Precision Industry Co., Ltd. Electronic device having button capable of preventing accidental depression
CN102222582B (en) * 2010-04-14 2015-01-28 鸿富锦精密工业（深圳）有限公司 Electronic device with buttons capable of preventing misoperation
US8283584B2 (en) * 2010-04-14 2012-10-09 Fu Tai Hua Industry (Shenzhen) Co., Ltd. Electronic device having button capable of preventing accidental depression
US9055712B2 (en) 2010-09-15 2015-06-16 Dawn Equipment Company Agricultural apparatus with integrated controller for a row unit
US9144187B2 (en) 2010-09-15 2015-09-29 Dawn Equipment Company Agricultural apparatus with hydraulic cylinder and manifold for a row unit
US8544398B2 (en) 2010-09-15 2013-10-01 Dawn Equipment Company Hydraulic down pressure control system for closing wheels of an agricultural implement
US10477752B2 (en) 2010-09-15 2019-11-19 Dawn Equipment Company Row unit for agricultural implement
US10506755B2 (en) 2010-09-15 2019-12-17 Dawn Equipment Company Agricultural systems
US11470754B2 (en) 2010-09-15 2022-10-18 Dawn Equipment Company Agricultural systems
US8770308B2 (en) 2010-09-15 2014-07-08 Dawn Equipment Company Row unit for agricultural implement
US8776702B2 (en) 2010-09-15 2014-07-15 Dawn Equipment Company Hydraulic down pressure control system for an agricultural implement
US9192089B2 (en) 2010-09-15 2015-11-24 Dawn Equipment Company Row unit for agricultural implement
US8544397B2 (en) 2010-09-15 2013-10-01 Dawn Equipment Company Row unit for agricultural implement
US9167740B2 (en) 2010-09-15 2015-10-27 Dawn Equipment Company Row unit for agricultural implement
US11122726B2 (en) 2010-09-15 2021-09-21 Dawn Equipment Company Agricultural systems
US10238024B2 (en) 2010-09-15 2019-03-26 Dawn Equipment Company Row unit for agricultural implement
US20120186952A1 (en) * 2011-01-12 2012-07-26 Masaya Hatano Switch with locking mechanism
JP2012146472A (en) * 2011-01-12 2012-08-02 Nitto Kogyo Co Ltd Switch with lock mechanism
US8742270B2 (en) * 2011-01-12 2014-06-03 Nitto Kogyo Corporation Switch with locking mechanism
US8863857B2 (en) 2011-02-23 2014-10-21 Dawn Equipment Company Row unit for agricultural implement
US11375653B2 (en) 2011-07-01 2022-07-05 Charles H. Martin Agricultural field preparation device
US10806064B2 (en) 2011-07-01 2020-10-20 Charles H. Martin Agricultural field preparation device
US12058944B2 (en) 2011-07-01 2024-08-13 Charles H. Martin Agricultural field preparation device
US10834863B2 (en) 2011-08-05 2020-11-17 Precision Planting Llc Apparatus, systems and methods for row unit downforce control
US8763713B2 (en) 2012-01-27 2014-07-01 Dawn Equipment Company Agricultural implement with automatic down pressure control
US8636077B2 (en) 2012-05-22 2014-01-28 Dawn Equipment Company Agricultural tool with structural housing for hydraulic actuator
US9746007B2 (en) 2012-07-25 2017-08-29 Precision Planting Llc Integrated implement downforce control systems, methods, and apparatus
US10443631B2 (en) 2012-07-25 2019-10-15 Precision Planting Llc Integrated implement downforce control systems, methods, and apparatus
US8910581B2 (en) 2012-07-25 2014-12-16 Dawn Equipment Company Side dressing fertilizer coulter
US8985232B2 (en) 2012-08-20 2015-03-24 Dawn Equipment Company Agricultural apparatus for sensing and providing feedback of soil property changes in real time
US9192091B2 (en) 2013-02-01 2015-11-24 Dawn Equipment Company Agricultural apparatus with hybrid single-disk, double-disk coulter arrangement
US10721855B2 (en) 2014-02-05 2020-07-28 Dawn Equipment Company Agricultural system for field preparation
US10251333B2 (en) 2014-11-07 2019-04-09 Dawn Equipment Company Agricultural system
US10582653B2 (en) 2014-11-07 2020-03-10 Dawn Equipment Company Agricultural planting system with automatic depth control
US10444774B2 (en) 2014-11-07 2019-10-15 Dawn Equipment Company Agricultural system
US11197411B2 (en) 2014-11-07 2021-12-14 Dawn Equipment Company Agricultural planting system with automatic depth control
US11083134B2 (en) 2015-12-28 2021-08-10 Underground Agriculture, LLC Agricultural inter-row mowing device
US10980174B2 (en) 2015-12-28 2021-04-20 Underground Agriculture, LLC Agricultural mowing device
US10067534B2 (en) * 2016-05-10 2018-09-04 Fu Tai Hua Industry (Shenzhen) Co., Ltd. Assembly for preventing unexpected shutdown and electronic device with the same
CN107358132A (en) * 2016-05-10 2017-11-17 富泰华工业（深圳）有限公司 Anti- shutdown component and the electronic installation with the anti-shutdown component
TWI672720B (en) * 2016-05-10 2019-09-21 鴻海精密工業股份有限公司 Assembly for preventing shutting down and electronic device with the same
US20170329367A1 (en) * 2016-05-10 2017-11-16 Fu Tai Hua Industry (Shenzhen) Co., Ltd. Assembly for preventing unexpected shutdown and electronic device with the same
US11006563B2 (en) 2017-05-04 2021-05-18 Dawn Equipment Company Seed firming device for improving seed to soil contact in a planter furrow with feature designed to prevent the buildup of soil on the outer surfaces by discharging pressurized fluid
US12089518B2 (en) 2017-05-04 2024-09-17 Dawn Equipment Company, Inc. Seed firming device for improving seed to soil contact in a planter furrow with feature designed to prevent the buildup of soil on the outer surfaces by discharging pressurized fluid
CN112262099A (en) * 2018-03-30 2021-01-22 雷亚迪明碧提公司,以碧提布兰德公司名义营业 Container and dispenser system and device
US11510476B2 (en) * 2018-03-30 2022-11-29 Rea.Deeming Beauty, Inc. Container and dispenser system and apparatus

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