WO2000007853A1 - Vehicle horn and control function switch - Google Patents
Vehicle horn and control function switch Download PDFInfo
- Publication number
- WO2000007853A1 WO2000007853A1 PCT/US1999/015033 US9915033W WO0007853A1 WO 2000007853 A1 WO2000007853 A1 WO 2000007853A1 US 9915033 W US9915033 W US 9915033W WO 0007853 A1 WO0007853 A1 WO 0007853A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- control function
- force
- temperature
- signal
- horn
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q5/00—Arrangement or adaptation of acoustic signal devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q5/00—Arrangement or adaptation of acoustic signal devices
- B60Q5/001—Switches therefor
- B60Q5/003—Switches therefor mounted on the steering wheel
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/20—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components
- B60R21/215—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components characterised by the covers for the inflatable member
- B60R21/2165—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components characterised by the covers for the inflatable member characterised by a tear line for defining a deployment opening
- B60R21/21656—Steering wheel covers or similar cup-shaped covers
- B60R21/21658—Steering wheel covers or similar cup-shaped covers with integrated switches, e.g. horn switches
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K2217/00—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00
- H03K2217/94—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00 characterised by the way in which the control signal is generated
- H03K2217/9401—Calibration techniques
- H03K2217/94026—Automatic threshold calibration; e.g. threshold automatically adapts to ambient conditions or follows variation of input
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K2217/00—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00
- H03K2217/94—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00 characterised by the way in which the control signal is generated
- H03K2217/9401—Calibration techniques
- H03K2217/94031—Calibration involving digital processing
Definitions
- the present invention relates to a vehicle horn and control function switch apparatus and, more particularly, to a vehicle horn and control function switch apparatus for steering wheel applications with compensation for effects of temperature and preloading.
- the invention also relates to a method of operation for the compensated switch apparatus.
- the driver side airbag is located in the center of the vehicle steering wheel, along with the horn switch and other vehicle controls.
- automotive designers turned to very thin electronic switch devices for horn actuation that could easily be positioned over an airbag cover.
- these devices suffered from the effects of temperature changes and static forces from adjacent components resulting from the manufacturing process or material aging characteristics .
- the sensors comprise both a temperature sensing device and a horn switch deflection sensing device operated by applied force mounted on the airbag cover surface and connected to an analog to digital converter controlled by a microprocessor.
- the microprocessor evaluates and compares the temperature and deflection signals to determine if the deflection of the cover surface is sufficient, when compensating for change in cover stiffness due to temperature change of the cover surface, to actuate a horn.
- a horn and control function switch temperature compensation means that enables reliable operation over a temperature range of about -40°C to about +85°C.
- a horn and control function switch preload compensation means must enable reliable operation over a range of applied force to the switch sensor of from 1 Kg up to 5 Kg.
- a typical resistance range of a horn and control function switch sensor is from 39 Kohms to 188 Kohms at -40°C, and from 2 Kohms to 12 Kohms at 85°C, there is a need to match this extremely wide dynamic sensor operating range to the fixed operating range of the control circuitry with suitable dynamic range compensation means.
- the horn and control function switch and associated circuitry must be easily and inexpensively fabricated, assembled, tested, calibrated, and installed.
- the present invention is directed to an apparatus and method of operation that satisfies these needs.
- Such a device is disclosed in the appended main claim and variations are set forth in the subordinate claims.
- FIG.l shows a vehicle steering wheel with an airbag assembly.
- FIG. 2 shows a cross sectional view of a steering wheel mounted airbag assembly with force and temperature sensors connected to associated electronics circuitry and horn.
- FIG. 3 shows the resistance characteristics of a typical force sensitive resistive device over a normal range of applied force at three operating temperatures .
- FIG.4 shows the conductance characteristics of a typical force sensitive resistive device over a normal range of applied force at three operating temperatures .
- FIG. 5 shows the conductance characteristics of a typical force sensitive resistive device at a temperature of 25°C over a normal range of applied force at four different levels of preload forces.
- FIG. 6 shows a block diagram of the amplifying and offsetting electronics circuitry for a temperature and preload compensated vehicle horn switch.
- FIG. 7 shows a programmable microcontroller with associated electronic circuitry for a temperature and preload compensated vehicle horn switch.
- FIG. 8 shows a block diagram of the amplifying and offsetting electronics circuitry for a temperature and preload compensated vehicle horn and control function switch.
- FIG. 9 shows a flow chart that depicts the sequence of operational steps performed by the programmable microcontroller.
- FIG. 1 is a view of a vehicle steering wheel assembly 10 having an outer perimeter 20 and a hub 22. Within the center of the hub 22 is an airbag assembly 100 molded into the hub 22 with molding material 25. Lines 2-2 are cutting plane lines identifying the location of the sectional drawing shown in FIG. 2.
- FIG. 2 shows a sectional view of a steering wheel mounted airbag assembly 100 with force sensor 140 and temperature sensor 150.
- the airbag assembly 100 has an airbag inflator 110 and an airbag 120 contained within a housing 130.
- Mounted to the housing 130 is a force sensor 140 and a temperature sensor 150 that are electrically connected to associated electronics circuitry 300 by force signal connections 212 and temperature signal connections 210.
- the airbag assembly 100, force sensor 140, and temperature sensor 150 are enclosed in molding material 25 and mounted onto a steering column 30.
- the electronics circuitry is electrically connected to a horn 500 by a horn actuation signal 214.
- a horn actuation signal 214 Although not shown, there may be more than a single force sensor in the configuration shown in FIG. 2.
- These other sensors are connected to electronics circuitry in a similar fashion to that shown in FIG. 2, but are used to actuate other control functions such as lighting control functions, entertainment audio control functions, speed control functions, and temperature control functions.
- FIG. 3 shows the resistance characteristics of a typical force sensitive resistive sensor over a normal range of applied force at three operating temperatures.
- the upper curve 610 depicts the variation of resistance with applied force from about
- the middle curve 620 depicts the variation of resistance with applied force from about 1.0 Kg to about 5.0 Kg at a temperature of 25°C.
- the lower curve 630 depicts the variation of resistance with applied force from about 1.0 Kg to about 5.0 Kg at a temperature of 85°C. The wide variations in resistance due to temperature at any given force are apparent from this depiction.
- FIG. 4 shows the conductance characteristics of a typical force sensitive resistive sensor over a normal range of applied force at three operating temperatures. These curves depict the same information as depicted in FIG. 3, but plotted as conductance which is the reciprocal of resistance. These curves depict more clearly the effective change in the sensitivity or gain with temperature with no preload forces.
- the upper curve 650 depicts the variation of conductance with applied force from about
- the middle curve 660 depicts the variation of conductance with applied force from about 1.0 Kg to about 5.0 Kg at a temperature of 25°C.
- the lower curve 670 depicts the variation of conductance with applied force from about 1.0 Kg to about 5.0 Kg at a temperature of
- FIG. 5 shows the conductance characteristics of a typical force sensitive resistive sensor device over a normal range of applied force at four different levels of preload forces at a temperature of 25°C.
- the upper curve 662 depicts the variation of conductance with applied force from about 1.0 Kg to about 5.0 Kg at 25°C with a preload force of 5.0 Kg.
- the upper-middle curve 664 depicts the variation of conductance with applied force from about 1.0 Kg to about 5.0 Kg at 25°C with a preload force of 3.0 Kg.
- the lower-middle curve 666 depicts the variation of conductance with applied force from about 1.0 Kg to about 5.0 Kg at 25°C with a preload force of 1.0 Kg.
- the lower curve 660 depicts the variation of conductance with applied force from about 1.0 Kg to about 5.0 Kg at 25°C with a preload force of 0.0 Kg.
- This latter curve 660 is the same as the middle curve 660 shown in FIG. 4.
- the quiescent state of the force sensor is where the applied force of these curves is zero and intersects with the vertical axis.
- the quiescent force signal of the upper curve 662 is 5.0 Kg
- the quiescent force signal of the upper middle curve 664 is 3.0 Kg
- the quiescent force signal of the lower middle curve 666 is 1.0 Kg
- the quiescent force signal of the lower curve 660 is 0.0 Kg.
- FIG. 6 shows a block diagram of the amplifying and offsetting electronics circuitry for a temperature and preload compensated vehicle horn switch.
- a force sensor 140 provides a force signal 212 to the input of an amplifier 350 having adjustable amplifying and offsetting capability.
- the amplifier 350 provides a compensated force signal 328 to a first input 312 of a programmable microcontroller 310.
- a temperature sensor 150 provides a temperature signal 210 to a second input 313 of the programmable microcontroller 310.
- the programmable microcontroller 310 provides an amplifying control signal 340 to the amplifier 350 from a first output 315, and an offsetting control signal 330 to the amplifier 350 from a second output 316.
- the programmable microcontroller 310 also provides a horn activating signal 322 to a horn actuator 320 from a third output 317.
- the horn actuator 320 provides a horn actuating signal 214 to a horn 500.
- the operation of the programmable microcontroller 310 may be described by six steps.
- the programmable microcontroller 310 first reads the compensated force signal 328 at the first input 312 of the programmable microcontroller 310 to determine if the compensated force signal 328 exceeds a predetermined threshold value, indicating an actuating compensated force signal.
- the programmable microcontroller 310 activates the third output 317 to generate a horn activating signal 322 and returns to the first step.
- the compensated force signal 328 is less than the threshold value in the first step indicating a quiescent compensated force signal
- the programmable microcontroller 310 deactivates the third output 317 to silence the horn 500.
- the programmable microcontroller 310 adjusts the offset of the amplifier 350 by energizing the offset control signal 330 from the second output 316 of the programmable microcontroller 310, based on the quiescent compensated force signal 328 from the first step.
- the programmable microcontroller 310 reads the temperature signal 210 at the second input 313 of the programmable microcontroller 310 and adjusts the amplifying of the amplifier 350 by energizing the amplifying control signal 340 from the first output 315 of the programmable microcontroller 310 based on the temperature signal 210.
- the control signals from the programmable microcontroller 310 are selected by being connected to ground potential by the programmable microcontroller 310.
- the sixth step is to return to the first step.
- FIG. 7 shows a preferred embodiment of the device is shown in accordance with the present inventive concepts.
- a force sensor 140 provides a force signal 212 to the negative input 354 of a biased inverting operational amplifier 352.
- the opposite side of the force sensor is connected to a ground potential .
- the negative input 354 of the biased inverting operational amplifier 352 is also connected to an offsetting input resistor network that determines the offsetting of the biased inverting operational amplifier 352, comprising resistor Rl 360, resistor R2 362, resistor R3 364, and resistor R4 366.
- the offsetting input resistor network is controlled by a second output 316 of the programmable microcontroller 310, the second output
- 316 being connected to a first offset control line 332 connected to resistor R4 366, a second offset control line 334 connected to resistor R3 364, a third offset control line 336 connected to resistor R2 362, and a fourth offset control line 338 connected to resistor Rl 360.
- the opposite side of the resistors are connected together and connected to the negative input 354 of the biased inverting operational amplifier 352.
- a positive input 356 of the biased inverting operational amplifier 352 is connected to a bias voltage.
- the biased inverting operational amplifier 352 provides a compensated force signal 328 to a first input 312 of the programmable microcontroller 310.
- a temperature sensor 150 provides a temperature signal 210 to a second input 313 of the programmable microcontroller 310 and to one side of a voltage divider resistor R9 380, the opposite side of resistor R9 380 being connected to ground potential.
- the temperature sensor 150 and the resistor R9 380 form a voltage divider configuration that is commonly used with temperature sensors.
- the opposite side of the temperature sensor 150 is connected to a reference voltage.
- An amplifying determining feedback resistor network comprising resistor R5 370, R6 372, R7 374, and R8 376 is connected between the negative input 354 and the output of the biased inverting operational amplifier 352.
- the amplifying determining feedback resistor network is controlled from a first output 315 of the programmable microcontroller 310, comprising a first amplifying control signal 342 connected to resistor R5 370 and a second amplifying control signal 344 connected to resistor R6 372.
- the programmable microcontroller 310 also provides a horn activating signal 322 to a horn actuator 320 from a third output 317.
- the horn actuator 320 provides a horn actuating signal 214 to a horn 500.
- the operation of the programmable microcontroller 310 may be described by six steps.
- the programmable microcontroller 310 first reads the compensated force signal 328 at the first input 312 of the programmable microcontroller 310 to determine if the compensated force signal 328 exceeds a predetermined threshold value, indicating an actuating compensated force signal. Second, if the compensated force signal 328 exceeds the threshold value in the first step indicating and actuating compensated force signal, the programmable microcontroller 310 activates the third output 317 and generates a horn activating signal 322 and returns to the first step. Third, if the compensated force signal 328 is less than the threshold value in the first step indicating a quiescent compensated force signal, the programmable microcontroller 310 deactivates the third output 317 to silence the horn 500.
- the programmable microcontroller 310 adjusts the offset of the biased inverting operational amplifier 352 by selectively energizing the control lines of the second output 316 of the programmable microcontroller 310, comprising the first offset control signal 332, the second offset control signal 334, the third offset control signal 336, and the fourth offset control signal 338.
- the selection of energizing control lines of the second output 316 of the programmable microcontroller 310 is based on the quiescent compensated force signal 328 from the first step.
- the programmable microcontroller 310 reads the temperature signal 210 at the second input 313 of the programmable microcontroller 310 and adjusts the amplifying of the biased inverting operational amplifier 352 by selectively energizing the first amplifying control signal 342 and the second amplifying control signal 344 from the first output 315 of the programmable microcontroller 310 based on the temperature signal 210.
- the control signals from the programmable microcontroller 310 are selected by being connected to ground potential by the programmable microcontroller 310.
- the sixth step is to return to the first step.
- FIG. 8 is a block diagram of an alternative the amplifying and offsetting electronics circuitry for a temperature and preload compensated vehicle horn and control function switch.
- a horn force sensor 140 provides a force signal 212 to the input of an amplifier 350 having adjustable amplifying and offsetting capability.
- the amplifier 350 provides a compensated force signal 328 to a first input 312 of a programmable microcontroller 310.
- a control function force sensor 160 provides a force signal 213 to the input of an amplifier 390 having adjustable amplifying and offsetting capability.
- a temperature sensor 150 provides a temperature signal 210 to a second input 313 of the programmable microcontroller 310.
- the programmable microcontroller 310 provides an amplifying control signal 340 to the amplifier 350 from a first output 315, and an offsetting control signal 330 to the amplifier 350 from a second output 316.
- the programmable microcontroller 310 also provides an amplifying control signal 341 to the amplifier 390 from a sixth output 319, and an offsetting control signal 331 to the amplifier 390 from a fifth output 314.
- the programmable microcontroller 310 also provides a horn activating signal 322 to a horn actuator 320 from a third output 317, and a control function activating signal 326 to a control function actuator 324 from a fourth output 318.
- the horn actuator 320 provides a horn actuating signal 214 to a horn 500 and the control function actuator 324 provides a control function actuating signal 216 to a control function 510.
- FIG. 9 shows a flow chart that depicts the sequence of operational steps performed by the programmable microcontroller. The first step performed by the programmable microcontroller is to read a compensated force signal . The compensated force signal is then compared to a predetermined threshold value.
- the horn is actuated and control is returned to the first step. If the compensated force signal is less than the predetermined threshold value indicative of a quiescent compensated force signal, the horn is silenced.
- the programmable microcontroller selects output control signals to adjust an input resistor network of a biased inverting operational amplifier to provide offset compensation based on the quiescent compensated force signal.
- the programmable microcontroller reads a temperature signal. The programmable then selects output control signals to adjust a feedback resistor network of a biased inverting operational amplifier to provide amplifying compensation based on the temperature signal. Control is then returned to the first step.
- Advantages of the present invention include reliable operation over extreme temperature ranges and a compensation scheme that accounts for changes in preload forces resulting from the manufacturing process or vehicle component material aging.
- This temperature and preload compensation scheme also reduces the resolution requirements of the electronic circuitry resulting in reduced costs.
- the compensation scheme also enables optimization of the dynamic range of the force signal at the input to the programmable microcontroller. This arrangement also provides for ease of initial setup in the manufacturing operation. The result is an apparatus that is easily and inexpensively fabricated, assembled, tested, calibrated, and installed.
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP99932190A EP1102692B1 (en) | 1998-08-06 | 1999-07-02 | Vehicle horn and control function switch |
DE69913703T DE69913703T2 (en) | 1998-08-06 | 1999-07-02 | HORN AND CONTROL FUNCTION SWITCH OF A VEHICLE |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/130,181 | 1998-08-06 | ||
US09/130,181 US5965952A (en) | 1998-08-06 | 1998-08-06 | Vehicle horn and control function switch with compensation and method of operation |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000007853A1 true WO2000007853A1 (en) | 2000-02-17 |
Family
ID=22443437
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1999/015033 WO2000007853A1 (en) | 1998-08-06 | 1999-07-02 | Vehicle horn and control function switch |
Country Status (5)
Country | Link |
---|---|
US (1) | US5965952A (en) |
EP (1) | EP1102692B1 (en) |
KR (1) | KR100511577B1 (en) |
DE (1) | DE69913703T2 (en) |
WO (1) | WO2000007853A1 (en) |
Families Citing this family (28)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6236309B1 (en) * | 1999-09-15 | 2001-05-22 | Delphi Technologies, Inc. | Horn switch assembly for an airbag module |
US6427540B1 (en) * | 2000-02-15 | 2002-08-06 | Breed Automotive Technology, Inc. | Pressure sensor system and method of excitation for a pressure sensor |
US6510036B1 (en) * | 2000-11-28 | 2003-01-21 | Delphi Technologies, Inc. | Method and apparatus to eliminate inadvertent horn activation |
DE10100257C2 (en) * | 2001-01-05 | 2003-02-06 | Autoliv Dev | Method for zero point adjustment in a steering wheel provided with a pressure sensor-controlled triggering of the horn function |
US6677853B1 (en) * | 2001-08-22 | 2004-01-13 | Jerrid Scott Canfield | Animal deterrent using vehicle horn |
US7000946B2 (en) * | 2003-01-21 | 2006-02-21 | Delphi Technologies, Inc. | Temperature compensated air bag control system |
DE202004018362U1 (en) * | 2004-11-26 | 2006-04-06 | Trw Automotive Safety Systems Gmbh & Co. Kg | Vehicle steering wheel with airbag module |
JP4285500B2 (en) * | 2006-04-25 | 2009-06-24 | トヨタ自動車株式会社 | Operating device |
DE102008004984A1 (en) * | 2008-01-17 | 2009-09-10 | Paragon Ag | Tripping device for a Hupanlage a motor vehicle |
US9007190B2 (en) * | 2010-03-31 | 2015-04-14 | Tk Holdings Inc. | Steering wheel sensors |
US8983732B2 (en) | 2010-04-02 | 2015-03-17 | Tk Holdings Inc. | Steering wheel with hand pressure sensing |
DE102011084903A1 (en) | 2011-10-20 | 2013-04-25 | TAKATA Aktiengesellschaft | Sensor systems for a motor vehicle |
WO2013154720A1 (en) | 2012-04-13 | 2013-10-17 | Tk Holdings Inc. | Pressure sensor including a pressure sensitive material for use with control systems and methods of using the same |
JP6260622B2 (en) | 2012-09-17 | 2018-01-17 | ティーケー ホールディングス インク.Tk Holdings Inc. | Single layer force sensor |
US9254786B2 (en) | 2012-11-05 | 2016-02-09 | Nissan North America, Inc. | Vehicle horn control assembly |
CN105452992B (en) | 2013-05-30 | 2019-03-08 | Tk控股公司 | Multidimensional Trackpad |
WO2015054364A1 (en) | 2013-10-08 | 2015-04-16 | Tk Holdings Inc. | Self-calibrating tactile haptic multi-touch, multifunction switch panel |
JP6413172B2 (en) * | 2014-01-10 | 2018-10-31 | 矢崎総業株式会社 | Disconnection detector |
JP6423154B2 (en) * | 2014-01-17 | 2018-11-14 | 矢崎総業株式会社 | Disconnection detector |
WO2015179730A1 (en) | 2014-05-22 | 2015-11-26 | Tk Holdings Inc. | Systems and methods for shielding a hand sensor system in a steering wheel |
CN106414216B (en) | 2014-06-02 | 2020-03-31 | Tk控股公司 | System and method for printing sensor circuit on sensor pad of steering wheel |
US10466826B2 (en) | 2014-10-08 | 2019-11-05 | Joyson Safety Systems Acquisition Llc | Systems and methods for illuminating a track pad system |
DE102014018497A1 (en) * | 2014-12-16 | 2016-06-16 | Autoliv Development Ab | A method of generating a horn actuation signal using a dynamometer located in a steering wheel and apparatus for performing this method |
CN108698540B (en) * | 2015-12-04 | 2022-03-01 | 均胜安全系统收购有限责任公司 | Force sensing horn system |
US10336361B2 (en) | 2016-04-04 | 2019-07-02 | Joyson Safety Systems Acquisition Llc | Vehicle accessory control circuit |
US11498481B2 (en) | 2019-04-03 | 2022-11-15 | Joyson Safety Systems Acquisition Llc | Minimum travel horn system |
US11518334B2 (en) | 2019-06-24 | 2022-12-06 | Joyson Safety Systems Acquisition Llc | Methods and systems for pre-fixing an airbag module during installation |
US11422629B2 (en) | 2019-12-30 | 2022-08-23 | Joyson Safety Systems Acquisition Llc | Systems and methods for intelligent waveform interruption |
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US5489806A (en) * | 1994-05-11 | 1996-02-06 | Morton International, Inc. | Airbag horn switch with temperature compensation |
US5576684A (en) * | 1990-07-13 | 1996-11-19 | Sensitron Inc. | Horn control system responsive to rapid changes in resistance of a flexible potentiometer |
US5625333A (en) * | 1995-09-22 | 1997-04-29 | Morton International, Inc. | Bend sensor horn switch assembly |
US5639998A (en) * | 1996-01-11 | 1997-06-17 | Morton International, Inc. | Horn switch jacket |
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US5269559A (en) * | 1992-04-29 | 1993-12-14 | Davidson Textron Inc. | Horn actuator incorporating a transducer in a steering wheel |
US5398962A (en) * | 1994-02-14 | 1995-03-21 | Force Imaging Technologies, Inc. | Horn activator for steering wheels with air bags |
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1998
- 1998-08-06 US US09/130,181 patent/US5965952A/en not_active Expired - Fee Related
-
1999
- 1999-07-02 KR KR10-2001-7001533A patent/KR100511577B1/en not_active IP Right Cessation
- 1999-07-02 EP EP99932190A patent/EP1102692B1/en not_active Expired - Lifetime
- 1999-07-02 WO PCT/US1999/015033 patent/WO2000007853A1/en active IP Right Grant
- 1999-07-02 DE DE69913703T patent/DE69913703T2/en not_active Expired - Fee Related
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US5576684A (en) * | 1990-07-13 | 1996-11-19 | Sensitron Inc. | Horn control system responsive to rapid changes in resistance of a flexible potentiometer |
US5489806A (en) * | 1994-05-11 | 1996-02-06 | Morton International, Inc. | Airbag horn switch with temperature compensation |
US5625333A (en) * | 1995-09-22 | 1997-04-29 | Morton International, Inc. | Bend sensor horn switch assembly |
US5639998A (en) * | 1996-01-11 | 1997-06-17 | Morton International, Inc. | Horn switch jacket |
Non-Patent Citations (1)
Title |
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See also references of EP1102692A4 * |
Also Published As
Publication number | Publication date |
---|---|
EP1102692A4 (en) | 2001-10-24 |
EP1102692A1 (en) | 2001-05-30 |
US5965952A (en) | 1999-10-12 |
KR20010072264A (en) | 2001-07-31 |
DE69913703D1 (en) | 2004-01-29 |
KR100511577B1 (en) | 2005-09-02 |
DE69913703T2 (en) | 2004-10-07 |
EP1102692B1 (en) | 2003-12-17 |
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