CA2209158A1 - Wheel disconnect alarm - Google Patents
Wheel disconnect alarmInfo
- Publication number
- CA2209158A1 CA2209158A1 CA 2209158 CA2209158A CA2209158A1 CA 2209158 A1 CA2209158 A1 CA 2209158A1 CA 2209158 CA2209158 CA 2209158 CA 2209158 A CA2209158 A CA 2209158A CA 2209158 A1 CA2209158 A1 CA 2209158A1
- Authority
- CA
- Canada
- Prior art keywords
- switch
- sketch
- alarm
- wheel
- ground
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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
- B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
- B60Q1/26—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic
- B60Q1/50—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic for indicating other intentions or conditions, e.g. request for waiting or overtaking
- B60Q1/52—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic for indicating other intentions or conditions, e.g. request for waiting or overtaking for indicating emergencies
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Emergency Alarm Devices (AREA)
Description
~'' J,~1 --~
' _: 5._,, '~
~Y
FINAL DRAW
~ CA 02209158 1997-08-01 WHEEL DISCONNECT ALARM
TABLE OF CONTENTS:
' _: 5._,, '~
~Y
FINAL DRAW
~ CA 02209158 1997-08-01 WHEEL DISCONNECT ALARM
TABLE OF CONTENTS:
2.... ... .... Purpose
3.... ..... Major Apparatus ~ 4. .......... Operation
4............ .A/ Circuit Continuity 4........... Bl/ Bearing Failure - ALARM with circuit continuity 4. .. . . B2/ Bearing Failure - ALARM without circuit continuity
5.. . .. C/ Loose Wheel Bolt - ALARM
6.......... . NOTES
7. . ...... Sketch A & Sketch A1, Heat Monitoring Circuit
8... . ... Sketch B, Wheel Bolt Monitoring Circuit ~ 9. ......... Sketch C & Sketch C2, Wheel/Bolt/Switch Arrangements 10.......... Sketch D & Sketch D1, Wheel, Bolt/Switch Arrangements 11..... . . Sketch E, Typical Transceiver & Typical Placement ll CA 022091~8 1997-08-01 WHEEL DISCONNECT ALARM
PURPOS~
nle purpose of this circui~ is to WARN the driver of the vehicle using alarm devices that will detccl in advancc, a possible "Wheel Disconnection". This wheel disconnect alarm will detect eithcr of thc rollowing conditions:
1. A pending 'whecl disconnection' caused by bearing failure (Inner or Outer) occurring inside the axle of Ihe vehicle (Sketch D & Dl).
Major causcs of bearing failure are bearing fa~igue (age/wear), overloads, and loss of lubricant.
Oil seals or lubricant housings break because the dual whcels are often dragged around comers (tight comer slippage), maneuvered over street curbs and large roadway holes, etc. This housing breakagc allows thc lubricant to escape causing the bearing to overheat, then fail. In these instances, friction caused from 'bearing failure' creates a large amount of heat on the outside housing of the axle. Once a certain temperature is reached, the entire dual wheel becomes dislodged from the axle. Heat sensors are anachcd to a bracelet and then the bracelet is f~q~ten~cl to the axle housin~ (Inner & Outer) to monitor heat levels, which indicate 'whecl ~ connect' condilions.
2. A pending 'wheel disconnection' caused from a loose wheel bolt allowing a wheel to disconnecl from the wheel stud and the axle (Sketch C).
A major cause for a loose wheel bolt is when wheels are subjected to extreme co~ g, to extreme bumps or poor m~;ntl~n~nce A micro switch or plunger switch is ~tt~hrd to a wheel rim (Ref.
Sketch C). This switch converts the mech~nir~l rel~1ion~hir between a wheel bolt and a wheel stud into a normally open, elcc~ronic condition, whilc the bolt is securely fastened to the stud. Once the bolt becomcs loose by one or two turns, contact pressure between the micro switch and the bolt collar is removed causing the switch to change from an open type switch contact to become a closed electronic switch contact (Ref. Sketch C2). The closed clectronic switch contact extends an operating voltage (zero ground) to a transceiver (Sketch C~). The transceiver then encodes a tone (submits a digital tone) to a receiver located in the monitor alarm unit located near the driver (Sketch B). This dccoder is used to announce the alarm to alert the driver of the loose wheel bolt and pending 'whcel disconnect'.
MAJOR APPARATUS --1. 'Heat Sensor Switch' - (Sketch A, Sketch D & Dl) A Heat Sensor SwiLch is fastened to a bracelet; then each axle housing (Inner & Outer) is equipped with this bracelel (Ske~ch Dl). The heat sensor switch provides advance detection by monitoring heat that is created when a bearing fails. The l~lllpeldLure of the heat sensor (a~,l.)xi~ tely 200 - 400 C) is somewhat lower than the actual heat temperature that is responsible for a wheel to become disconnected. This allows the heat sensor to operate in advance of the actual wheel disconnection and to warn the driver in advance of a pending 'wheel disconnect'.
2. ' Tr~ iv~, ' - (Sketch B & Sketch E); & 'Micro Switch' - (Sketch C & D) A Transceiver is connected to a Micro Switch (or the Plunger Switch) and the outer wheel bearing heat sensor switch. The transceiver, bolt/collar micro switch and heat sensor switch are fastened to the wheel. (Reference Sketch Cl, C2 & C3).
3. 'Monitor Unit' - (Sketch A & Sketch B) A Monitor Unit is located inside the vehicle to monitor the activity of both devices listed for 1 & 2 above. An active change in eilher device causes an alarm to alert the driver. The alarm includes bolh an audible ~piezo buzzerZ) and llashing visual LED (Light F.mifting Diode) . This unit conlains the following components: (IC = Integrated Circuit) ICl FL Flasher providing the alarm flashing ground zero volt (-V); type 555.
IC2 - IC6 RS Remote Sensing Switches; type 4066 Z Piezo Buzzer for audible alerl in an alarm.
LED Light F.mit~ing Diode D Decoder (Receiver) TR2 Transistor type 4401 RCLl Resistor 330 ohms; 1/4 watt RF, RE, RS Resistor 220 ohms; 1/4 watt Dl Diode type II'J4001 ~ 3 CA 022091~8 1997-08-01 OPERATION: ¦
ALARM occurs as follows:
A: Circuit Continuity- (Al . ,...~....~--1 for Heat Sensor / INNER Bearing Failure Only) In a state of rcadiness, each rNNER heat sensor switch (HS) provides a con~inuou~ ground (Zero Volls) via normally closed switch contacts, to cause an assigned axle (LED) Light F.mit~ing Diode to illuminale in a nonactive, 'No Alarm' state. The LEDs illllmin~e continuously to indicate circuit colllilluily, monitoring 'physical wire cormections' only in a fail-safe mode. If by some mcans a wire breaks or the heat sensitive switch becomes unconnected, the continuous ground provided by the normally closed heat sensor contact, continuous (HS) ground is removed; ground short to thc RS switch (IC 1 - IC5, R5/R4 Multiple) allows the RS switch to operate, to provide a zero voll (-V) ground to allow the operation of the IC1 FL flasher. The FL flasher then provides a 'nashillg ground through the operated RS swilch contacts to replace the continuous ground prcviously providcd by the unconnccted heat sensor switch (HS). The flashing ground (from FL/IC 1 ) causcs the unconnected HS, associated LED to flash off, then on, then off, etc. indicating an 'Alarm' s~ate. The same zero ground (-V) provided to operate the IC1 (from the alarmed RS
swilch contact) is also extended to operate the Piezo Buzzer (audible alert). Resistors R1 and R2 ~letennine the flash tirne (or~off) intervals.
Bl: Bearing Failure ALARM
Heat Sensor Switches -- (Sketch A & Sketch D2) - With Circuit Co--lh~uily Tlle contac~ within Ihe heat switch is a normally closed switch contact. Once the heat sensor switch delccts cxcessive heal (created in the axle housing from bearing failure) the heat sensor switch contact HS open to remove the continuous ground (Sketch A & Sketch D2). With the continuous ground (-V) removed (~hllnting the assigned remote switch RS), the assigned circuit connccted RS switch, operates the flasher FL/IC1 (Sketch A, IC2 through IC5). The IC1 flasher FL then provides a flashing ground (-V) via the operated RS switch contacts to replace the conlinuous ground (-V) previously provided by the rela~ed heat sensor switch (HS). The flashing ground from IC1 causes the LED to flash in an Alarm-Slate. The same zero ground (-V) provided to operale the ICl (Integraled Circuit #I) from the alarmed Remote Switch RS contact, is also exlended to operate the Piezo Buzzer 'Z' (audible alert). Resistors R1 and R2 determine the flash time inlerval to operate the LEDs in the Alarm-Slate.
B2: Bearing Failure ALARM
Heat Sensor Switches -- (Sketch Al & Sketch D3) - Without Circuit Conlil-uiLy -- For both Inner and Outer Bearing Failures Heal scnsitive switches (HS) are mounted on a bracelet then attached to the axle of the vehicle. The contact within the heat switch is a mj, Il ally open switch contact. Once the heat sensor switch detccts cxcessive heal (created in the axle housing from bearing failure) the heat sensor switch conlact HS close in an alarm condition (Sketch A1 & Sketch D3). This closed alarm condition extends an operating zero ground (-V) to operate the cnnnect~d transceiver (Sketch E). The transceiver encodes the alarm to a separate, assigned decoder in the monitor unit the same manner as describcd for the loose bolt alarm.
CA 022091~8 1997-08-01 C: Loose Wheel Bolt ALARM
Micro Switch / Transceiver - Encoder / Receiver - Decoder - Micro Switch / Plunger Switch -- Sketch C, Sketch Cl & Sketch C2 A mech~nical micro switch is attached to a wheel rim to electro-me~h~nic~lly convert a m~ch:~nic~l pressure contact between a bolt fastened with a collar (Ref. Sketch C) and an associa~cd wheel micro switch into 'circuit logic' as follows:
When a wheel bolt is tightened on the stud of the wheel, 'contact pressure' is applied between the mechanical switch ~plunger portion of the micro switch mounted with the transceiver and on the whccl rim) and the wheel stud (Sketch Cl). This tightened mech:lnic:ll 'contact pressure' between the collar and arm of the micro switch causes the switch to OPI~RATE its' contact in an 'open' condition (Sketch C). This 'open' condition discormects (removes) an operating voltage, zero ground (-V) from thc connecLed transceiver. Once a wheel bolt loosens or unwinds one or two tums, contact pr~ssure applied between the bolt mounted collar and the mechanical switch, plunger portion of thc micro switch mounted on the wheel rim, is removcd causing the mech~ni~.~l switch conlacts to R~LEASE in a 'closed' electrical condition (Sketch Cl). This closed condition extends an operating voltage zero ground (-V) to cause the electrically connected LrallSCt~ivt~l to aclivalc.
- Tr~ ivel Encoder -- Sketch B & Sketch E
The Transceiver, when made active, is used to encode the loosc wheel bolt and/or wheel bearing failure by tr~n~mining a digital tone (frequency) to the vehicle-monitoring receiver where it is decoded as a 'wheel alar n'. Switch closure, as previously described, extends zero ground (-V) to activate a Transceiver much the same as a regular, everyday hou~çhnld 'garage door' opener (located in some vehicles) that transmits a special tone to a 'garage door receiver .
A Transceiver is used with Normally Open type heat sensor (HS) switches to rlimin~t~ costly ~ wiring directly to individual assigned axle LEDs (located within the monitor unit). The collLilwily alarm (having the LED illuminate continuously) is elimin~t~d when the HS switch logic changes from normally closed to this normally open type . Switch closurc then occurs when the dangerous ~ hea~ is detected during the Alarm-Slate. This closed con(1i~ion extends zero ground (-V) to operate/activate the electrically cc nnrctt d transceiver.
- Receiver - Decoder -- Sketch B
A Decodcr 'D' (located inside the monitor unit) recogni 7.es the transceiver tone, decodes the tone and extends an operating voltage (zero ground) to the TR transistor (Sketch B & Sketch C2) causing the TR transistor to release and RE transistor to operate with the sarne flashing alarm procedure (LED and audio buzzer) as describes for the heat sensor switch, HS operation. A
T ~t~hing zero ground (-V) is provided via IC6, through diode D2 to latch this 'Loose Bolt' alarm circuit in thc alarm condition. This latching function is provided to replace any momen~ty pulses lha~ have incurred from 'contact bouncing'. The micro switch connected to the wheel bolt may experience momcntary open and closures (contact bounce) during the first turn of a loose wheel bolt alarm. Other occurrences such as a rock impact on the wheel might cause a similar contact bounce. A push button (LR) switch when operated will disable the momentary type alarm. If the alarm immediately reoccurs, the alarm is genuine.
~ 5 NOTES
1. Multipled thru to circuits 1- 10 and 'LWNC' (Loose Wheel Nut Circuit).
2. Capicator Cl = .01uf.
3. Capicator C2 = 10uf.
4. Reisistors RF~ & RF2 - 22K ohms.
5. Resistors RSl thru RS4 (all desigin~ted RS count) etc, RE4 thru RE5 = 221K.
6. Resisitors RLl thru RL10 & RCLl are .33k ohms.
7. Diodes are type IN4001 or equivalent.
8. Transistor T2 = type 4401.
PURPOS~
nle purpose of this circui~ is to WARN the driver of the vehicle using alarm devices that will detccl in advancc, a possible "Wheel Disconnection". This wheel disconnect alarm will detect eithcr of thc rollowing conditions:
1. A pending 'whecl disconnection' caused by bearing failure (Inner or Outer) occurring inside the axle of Ihe vehicle (Sketch D & Dl).
Major causcs of bearing failure are bearing fa~igue (age/wear), overloads, and loss of lubricant.
Oil seals or lubricant housings break because the dual whcels are often dragged around comers (tight comer slippage), maneuvered over street curbs and large roadway holes, etc. This housing breakagc allows thc lubricant to escape causing the bearing to overheat, then fail. In these instances, friction caused from 'bearing failure' creates a large amount of heat on the outside housing of the axle. Once a certain temperature is reached, the entire dual wheel becomes dislodged from the axle. Heat sensors are anachcd to a bracelet and then the bracelet is f~q~ten~cl to the axle housin~ (Inner & Outer) to monitor heat levels, which indicate 'whecl ~ connect' condilions.
2. A pending 'wheel disconnection' caused from a loose wheel bolt allowing a wheel to disconnecl from the wheel stud and the axle (Sketch C).
A major cause for a loose wheel bolt is when wheels are subjected to extreme co~ g, to extreme bumps or poor m~;ntl~n~nce A micro switch or plunger switch is ~tt~hrd to a wheel rim (Ref.
Sketch C). This switch converts the mech~nir~l rel~1ion~hir between a wheel bolt and a wheel stud into a normally open, elcc~ronic condition, whilc the bolt is securely fastened to the stud. Once the bolt becomcs loose by one or two turns, contact pressure between the micro switch and the bolt collar is removed causing the switch to change from an open type switch contact to become a closed electronic switch contact (Ref. Sketch C2). The closed clectronic switch contact extends an operating voltage (zero ground) to a transceiver (Sketch C~). The transceiver then encodes a tone (submits a digital tone) to a receiver located in the monitor alarm unit located near the driver (Sketch B). This dccoder is used to announce the alarm to alert the driver of the loose wheel bolt and pending 'whcel disconnect'.
MAJOR APPARATUS --1. 'Heat Sensor Switch' - (Sketch A, Sketch D & Dl) A Heat Sensor SwiLch is fastened to a bracelet; then each axle housing (Inner & Outer) is equipped with this bracelel (Ske~ch Dl). The heat sensor switch provides advance detection by monitoring heat that is created when a bearing fails. The l~lllpeldLure of the heat sensor (a~,l.)xi~ tely 200 - 400 C) is somewhat lower than the actual heat temperature that is responsible for a wheel to become disconnected. This allows the heat sensor to operate in advance of the actual wheel disconnection and to warn the driver in advance of a pending 'wheel disconnect'.
2. ' Tr~ iv~, ' - (Sketch B & Sketch E); & 'Micro Switch' - (Sketch C & D) A Transceiver is connected to a Micro Switch (or the Plunger Switch) and the outer wheel bearing heat sensor switch. The transceiver, bolt/collar micro switch and heat sensor switch are fastened to the wheel. (Reference Sketch Cl, C2 & C3).
3. 'Monitor Unit' - (Sketch A & Sketch B) A Monitor Unit is located inside the vehicle to monitor the activity of both devices listed for 1 & 2 above. An active change in eilher device causes an alarm to alert the driver. The alarm includes bolh an audible ~piezo buzzerZ) and llashing visual LED (Light F.mifting Diode) . This unit conlains the following components: (IC = Integrated Circuit) ICl FL Flasher providing the alarm flashing ground zero volt (-V); type 555.
IC2 - IC6 RS Remote Sensing Switches; type 4066 Z Piezo Buzzer for audible alerl in an alarm.
LED Light F.mit~ing Diode D Decoder (Receiver) TR2 Transistor type 4401 RCLl Resistor 330 ohms; 1/4 watt RF, RE, RS Resistor 220 ohms; 1/4 watt Dl Diode type II'J4001 ~ 3 CA 022091~8 1997-08-01 OPERATION: ¦
ALARM occurs as follows:
A: Circuit Continuity- (Al . ,...~....~--1 for Heat Sensor / INNER Bearing Failure Only) In a state of rcadiness, each rNNER heat sensor switch (HS) provides a con~inuou~ ground (Zero Volls) via normally closed switch contacts, to cause an assigned axle (LED) Light F.mit~ing Diode to illuminale in a nonactive, 'No Alarm' state. The LEDs illllmin~e continuously to indicate circuit colllilluily, monitoring 'physical wire cormections' only in a fail-safe mode. If by some mcans a wire breaks or the heat sensitive switch becomes unconnected, the continuous ground provided by the normally closed heat sensor contact, continuous (HS) ground is removed; ground short to thc RS switch (IC 1 - IC5, R5/R4 Multiple) allows the RS switch to operate, to provide a zero voll (-V) ground to allow the operation of the IC1 FL flasher. The FL flasher then provides a 'nashillg ground through the operated RS swilch contacts to replace the continuous ground prcviously providcd by the unconnccted heat sensor switch (HS). The flashing ground (from FL/IC 1 ) causcs the unconnected HS, associated LED to flash off, then on, then off, etc. indicating an 'Alarm' s~ate. The same zero ground (-V) provided to operate the IC1 (from the alarmed RS
swilch contact) is also extended to operate the Piezo Buzzer (audible alert). Resistors R1 and R2 ~letennine the flash tirne (or~off) intervals.
Bl: Bearing Failure ALARM
Heat Sensor Switches -- (Sketch A & Sketch D2) - With Circuit Co--lh~uily Tlle contac~ within Ihe heat switch is a normally closed switch contact. Once the heat sensor switch delccts cxcessive heal (created in the axle housing from bearing failure) the heat sensor switch contact HS open to remove the continuous ground (Sketch A & Sketch D2). With the continuous ground (-V) removed (~hllnting the assigned remote switch RS), the assigned circuit connccted RS switch, operates the flasher FL/IC1 (Sketch A, IC2 through IC5). The IC1 flasher FL then provides a flashing ground (-V) via the operated RS switch contacts to replace the conlinuous ground (-V) previously provided by the rela~ed heat sensor switch (HS). The flashing ground from IC1 causes the LED to flash in an Alarm-Slate. The same zero ground (-V) provided to operale the ICl (Integraled Circuit #I) from the alarmed Remote Switch RS contact, is also exlended to operate the Piezo Buzzer 'Z' (audible alert). Resistors R1 and R2 determine the flash time inlerval to operate the LEDs in the Alarm-Slate.
B2: Bearing Failure ALARM
Heat Sensor Switches -- (Sketch Al & Sketch D3) - Without Circuit Conlil-uiLy -- For both Inner and Outer Bearing Failures Heal scnsitive switches (HS) are mounted on a bracelet then attached to the axle of the vehicle. The contact within the heat switch is a mj, Il ally open switch contact. Once the heat sensor switch detccts cxcessive heal (created in the axle housing from bearing failure) the heat sensor switch conlact HS close in an alarm condition (Sketch A1 & Sketch D3). This closed alarm condition extends an operating zero ground (-V) to operate the cnnnect~d transceiver (Sketch E). The transceiver encodes the alarm to a separate, assigned decoder in the monitor unit the same manner as describcd for the loose bolt alarm.
CA 022091~8 1997-08-01 C: Loose Wheel Bolt ALARM
Micro Switch / Transceiver - Encoder / Receiver - Decoder - Micro Switch / Plunger Switch -- Sketch C, Sketch Cl & Sketch C2 A mech~nical micro switch is attached to a wheel rim to electro-me~h~nic~lly convert a m~ch:~nic~l pressure contact between a bolt fastened with a collar (Ref. Sketch C) and an associa~cd wheel micro switch into 'circuit logic' as follows:
When a wheel bolt is tightened on the stud of the wheel, 'contact pressure' is applied between the mechanical switch ~plunger portion of the micro switch mounted with the transceiver and on the whccl rim) and the wheel stud (Sketch Cl). This tightened mech:lnic:ll 'contact pressure' between the collar and arm of the micro switch causes the switch to OPI~RATE its' contact in an 'open' condition (Sketch C). This 'open' condition discormects (removes) an operating voltage, zero ground (-V) from thc connecLed transceiver. Once a wheel bolt loosens or unwinds one or two tums, contact pr~ssure applied between the bolt mounted collar and the mechanical switch, plunger portion of thc micro switch mounted on the wheel rim, is removcd causing the mech~ni~.~l switch conlacts to R~LEASE in a 'closed' electrical condition (Sketch Cl). This closed condition extends an operating voltage zero ground (-V) to cause the electrically connected LrallSCt~ivt~l to aclivalc.
- Tr~ ivel Encoder -- Sketch B & Sketch E
The Transceiver, when made active, is used to encode the loosc wheel bolt and/or wheel bearing failure by tr~n~mining a digital tone (frequency) to the vehicle-monitoring receiver where it is decoded as a 'wheel alar n'. Switch closure, as previously described, extends zero ground (-V) to activate a Transceiver much the same as a regular, everyday hou~çhnld 'garage door' opener (located in some vehicles) that transmits a special tone to a 'garage door receiver .
A Transceiver is used with Normally Open type heat sensor (HS) switches to rlimin~t~ costly ~ wiring directly to individual assigned axle LEDs (located within the monitor unit). The collLilwily alarm (having the LED illuminate continuously) is elimin~t~d when the HS switch logic changes from normally closed to this normally open type . Switch closurc then occurs when the dangerous ~ hea~ is detected during the Alarm-Slate. This closed con(1i~ion extends zero ground (-V) to operate/activate the electrically cc nnrctt d transceiver.
- Receiver - Decoder -- Sketch B
A Decodcr 'D' (located inside the monitor unit) recogni 7.es the transceiver tone, decodes the tone and extends an operating voltage (zero ground) to the TR transistor (Sketch B & Sketch C2) causing the TR transistor to release and RE transistor to operate with the sarne flashing alarm procedure (LED and audio buzzer) as describes for the heat sensor switch, HS operation. A
T ~t~hing zero ground (-V) is provided via IC6, through diode D2 to latch this 'Loose Bolt' alarm circuit in thc alarm condition. This latching function is provided to replace any momen~ty pulses lha~ have incurred from 'contact bouncing'. The micro switch connected to the wheel bolt may experience momcntary open and closures (contact bounce) during the first turn of a loose wheel bolt alarm. Other occurrences such as a rock impact on the wheel might cause a similar contact bounce. A push button (LR) switch when operated will disable the momentary type alarm. If the alarm immediately reoccurs, the alarm is genuine.
~ 5 NOTES
1. Multipled thru to circuits 1- 10 and 'LWNC' (Loose Wheel Nut Circuit).
2. Capicator Cl = .01uf.
3. Capicator C2 = 10uf.
4. Reisistors RF~ & RF2 - 22K ohms.
5. Resistors RSl thru RS4 (all desigin~ted RS count) etc, RE4 thru RE5 = 221K.
6. Resisitors RLl thru RL10 & RCLl are .33k ohms.
7. Diodes are type IN4001 or equivalent.
8. Transistor T2 = type 4401.
9. Integrated Circuit ICl = type 555.
10. Integrated Circuits IC2 thru IC6 = type 4406.
11. Connect to each 'RS' (Remote Switch) Mult. of each Circuit IC2 thru to IC5.
12. Latch Release 'LR' is a notmally closed single pole contact switch; pluse type.
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2209158 CA2209158A1 (en) | 1997-08-01 | 1997-08-01 | Wheel disconnect alarm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2209158 CA2209158A1 (en) | 1997-08-01 | 1997-08-01 | Wheel disconnect alarm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2209158A1 true CA2209158A1 (en) | 1999-02-01 |
Family
ID=4160973
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2209158 Abandoned CA2209158A1 (en) | 1997-08-01 | 1997-08-01 | Wheel disconnect alarm |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2209158A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7228932B2 (en) * | 2003-07-17 | 2007-06-12 | Arvinmeritor Technology, Llc | Wheel end condition detection system |
| GB2550389A (en) * | 2016-05-18 | 2017-11-22 | Indespension Ltd | A detachment alert device |
-
1997
- 1997-08-01 CA CA 2209158 patent/CA2209158A1/en not_active Abandoned
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7228932B2 (en) * | 2003-07-17 | 2007-06-12 | Arvinmeritor Technology, Llc | Wheel end condition detection system |
| GB2550389A (en) * | 2016-05-18 | 2017-11-22 | Indespension Ltd | A detachment alert device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |