WO2001045066A1 - Safety device for emergency vehicles - Google Patents
Safety device for emergency vehicles Download PDFInfo
- Publication number
- WO2001045066A1 WO2001045066A1 PCT/ES2000/000462 ES0000462W WO0145066A1 WO 2001045066 A1 WO2001045066 A1 WO 2001045066A1 ES 0000462 W ES0000462 W ES 0000462W WO 0145066 A1 WO0145066 A1 WO 0145066A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- circuit
- vehicles
- emergency
- emergency vehicles
- signal
- Prior art date
Links
- 241000269400 Sirenidae Species 0.000 claims description 6
- 230000004913 activation Effects 0.000 claims description 3
- 239000003990 capacitor Substances 0.000 description 7
- 230000010287 polarization Effects 0.000 description 2
- 230000003213 activating effect Effects 0.000 description 1
- 230000009849 deactivation Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/09—Arrangements for giving variable traffic instructions
- G08G1/0962—Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
- G08G1/0965—Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages responding to signals from another vehicle, e.g. emergency vehicle
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/08—Constructional details, e.g. cabinet
- H04B1/082—Constructional details, e.g. cabinet to be used in vehicles
Definitions
- the mission of said invention is a protection system that on the one hand protects emergency vehicles in service (ambulances, firefighters, police, civil protection), and on the other the rest of vehicles that are circulating through public roads
- This device is built so that when an emergency vehicle is in service, it emits a frequency (with a certain range of radius) that disconnects the car radios of the other vehicles so that they can hear their sirens well in advance, because because of the high volume with which drivers carry music is difficult for them to perceive the proximity of an emergency vehicle, for which seconds are essential to save lives
- This device has two objectives
- said device will ensure that vehicles that circulate with priority on other lanes (because they have their green traffic light), can perceive their presence by automatically disconnecting their car radio and being able to be so more noticeable the sound of your siren well in advance
- Figure 2 Shows the circuit scheme that is incorporated in the rest of vehicles (Circuit 2)
- the device of the invention consists of two parts -
- the first part consists of a UHF emitter, incorporated in emergency vehicles, which is connected to its sirens
- the second part consists of a receiver that is incorporated into the rest of the vehicles, which is connected in sene with the power supply of their car radios
- the transmitter When the driver of the emergency vehicle connects the sirens (for being in an emergency situation), the transmitter will be connected simultaneously, which will emit a frequency (with a certain range), which will be picked up by the receivers incorporated in the others vehicles (vehicles that are within the range of the transmitter), and will automatically disconnect the radios
- This utility model consists of two main circuits 1 and 2, formed by a transmitter installed in emergency vehicles, and a receiver installed in the rest of vehicles that circulate on public roads
- Circuit 1 is composed of a power regulator 9, responsible for adapting the power of the circuits that make up the transmitter With the desired voltage, we feed two tone generating circuits 15 and 16 (these two circuits are symmetrical, that is, they are completely same), whose main mission is to modulate the signal with specific frequency tones, so that the receiver 3 1 of circuit 2, act only with the tones generated by circuits 15 and 16, ensuring the reliability of the activation of the receiver occurs only with certain signals
- the outputs of circuits 15 and 16 are mixed, and are connected to the transmitter module 18 (radio frequency transmitter module MOD TX-SAW 433 / sz approved BZT LPD-D), which is responsible for radiating the signal to circuit 2, coupled by a transformer 19 to the antenna 20
- the transmitter module 18 radio frequency transmitter module MOD TX-SAW 433 / sz approved BZT LPD-D
- circuit 2 disconnects the car radios until it stops receiving go signal sent by circuit 1 (not being within the range of the frequency it emits)
- the circuit 2 is
- receiver module 31 Data Receiver 433.92 MHz approved BZT LPD-D
- antenna 28 is responsible for receiving the signal sent by the transmitter, and for sending it to two tone decoder circuits 38 and 39, which are responsible for verifying that the signal received by the receiver is the one sent by circuit 1.
- the decoders compare the signal, connecting at low level the comparator input 40 If its input is correct, it sets its output (there is current), thus activating an integrator circuit 43, which is responsible for giving a delay time to the activation and deactivation of circuit 47, which by means of a relay, disconnects and connects the car radios
- circuit 2 we have to put a voltage regulator circuit 27, which has the same components as 9 an inductance 22, a voltage regulator 24 which in this case is different from 6 (due to to which circuit 2 is fed to a voltage 26 different from 1), and two capacitors 23 and 25 With this voltage we supply the receiver module 30, whose signal input is made by a capacitor 51 in series with the same antenna 28 that carry the vehicles to connect their car radios
- the output of the module is carried out by means of a capacitor 29 that acts as a filter of two decoder circuits of tone 38 and 39 (symmetrical), whose polarization circuit is composed of.
- SUBSTITUTE SHEET RULE 26 car radio 50 This network is composed of a resistor 41, a capacitor 42 that when activated, saturates a transistor 46 whose mission is to activate the relay, a diode 44 (responsible for protecting the transistor), and the relay of said relay will use a normally closed contact 48, which we will place in series with the vehicle's power cable 49 (controlled by the ignition switch) and the car radio 50 This will cause when the relay activates the car radio is disconnected, and when the relay deactivates the car radio automatically reconnects
Landscapes
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Traffic Control Systems (AREA)
Abstract
The invention relates to a device that turns off auto radios of vehicles by means of a receiver device once said receiver device receives the signal sent from in-service emergency vehicles by a transmitter that is installed in said emergency vehicles. When this happens, the drivers of the vehicles become aware of the presence of emergency vehicles and can thus help expedite the work of said emergency vehicles. Once the emergency vehicle has driven away, the auto radios of the vehicles are once again turned on.
Description
DISPOSITIVO DE SEGURIDAD PARA VEHÍCULOS DE EMERGENCIA SAFETY DEVICE FOR EMERGENCY VEHICLES
OBJETO DE LA INVENCIÓN La misión de dicha invención, es un sistema de protección que por una parte proteja a los vehículos de emergencia en servιcιo(ambulancιas, bomberos, policía, protección civil ), y por otra al resto de vehículos que se encuentran circulando por la vía publicaOBJECT OF THE INVENTION The mission of said invention is a protection system that on the one hand protects emergency vehicles in service (ambulances, firefighters, police, civil protection), and on the other the rest of vehicles that are circulating through public roads
Este dispositivo esta construido para que cuando un vehículo de emergencia se encuentre en servicio, emita una frecuencia (con un cierto radio de alcance) que desconecta las autoradios de los demás vehículos para que puedan oír sus sirenas con suficiente antelación, ya que por culpa del elevado volumen con que llevan los conductores la música les es difícil percibir la proximidad de un vehículo de emergencia, para el cual los segundos son imprescindibles para salvar vidasThis device is built so that when an emergency vehicle is in service, it emits a frequency (with a certain range of radius) that disconnects the car radios of the other vehicles so that they can hear their sirens well in advance, because because of the high volume with which drivers carry music is difficult for them to perceive the proximity of an emergency vehicle, for which seconds are essential to save lives
Este dispositivo tiene dos objetivosThis device has two objectives
- Protección del vehículo de emergencia de accidentes (por tener prioridad)- Protection of the emergency vehicle from accidents (for having priority)
Debido a que dichos vehículos tienen que saltarse en muchos cruces los semáforos en rojo, dicho dispositivo les asegurara que los vehículos que circulan con prioridad por otros carriles ( por tener su semáforo en verde), pueden percibir su presencia al desconectarles automáticamente su autoradio y poder ser asi mas percibible el sonido de su sirena con suficiente antelaciónBecause these vehicles have to skip the red traffic lights at many junctions, said device will ensure that vehicles that circulate with priority on other lanes (because they have their green traffic light), can perceive their presence by automatically disconnecting their car radio and being able to be so more noticeable the sound of your siren well in advance
- Protección de los demás vehículos y peatones Al circular con elevado volumen de las autoradios en nuestro vehículo, nos es prácticamente imposible percibir el sonido de las sirenas hasta que no tenemos los vehículos de emergencia encima, lo cual no nos deja suficiente tiempo para desplazarnos a un lado de la vía, y de esta manera facilitarles el paso, ya que su tiempo es crucial Al darnos cuenta de su presencia tan próxima, lo único que hacemos es ponernos nerviosos para poder dejarles pasar lo antes posible, y hacemos maniobras que pueden resultar peligrosas para nosotros, los otros vehículos e incluso los peatones que circulan por la calzada (ej subirnos a ella) pudiendo provocar un accidente- Protection of other vehicles and pedestrians When driving with high volume of car radios in our vehicle, it is practically impossible for us to perceive the sound of sirens until we have emergency vehicles on top, which does not allow us enough time to move to one side of the road, and in this way facilitate their passage, since their time is crucial When we realize their presence so close, all we do is get nervous to let them pass as soon as possible, and we make maneuvers that can result dangerous for us, the other vehicles and even the pedestrians that circulate on the road (eg get on it) and can cause an accident
BREVE DESCRIPCIÓN DE LOS DIBUJOS Figura 1 Muestra el esσuema del circuito que va incorporado en los vehículos de emergencia (Circuitol )BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 Shows the circuit scheme that is incorporated into emergency vehicles (Circuitol)
Figura 2 Muestra el esquema del circuito que va incorporado en el resto de vehículos (Circuito 2)Figure 2 Shows the circuit scheme that is incorporated in the rest of vehicles (Circuit 2)
H
DESCRIPCIÓN DE LA INVENCIÓNH DESCRIPTION OF THE INVENTION
El dispositivo de la invención consta de dos partes - La primera parte consiste en un aparato emisor de UHF, incorporado en los vehículos de emergencia, que va conectado con sus sirenasThe device of the invention consists of two parts - The first part consists of a UHF emitter, incorporated in emergency vehicles, which is connected to its sirens
- La segunda parte consiste en un receptor que va incorporado en el resto de vehículos, el cual va conectado en sene con la alimentación de sus autoradios- The second part consists of a receiver that is incorporated into the rest of the vehicles, which is connected in sene with the power supply of their car radios
Cuando el conductor del vehículo de emergencia conecte las sirenas ( por encontrarse en situación de emergencia) , simultáneamente se conectara el emisor, el cual emitirá una frecuencia (con un cierto radio de alcance), la cual sera captada por los receptores incorporados en los demás vehículos (vehículos que se encuentren en el radio de alcance del emisor), v desconectara las autoradios automáticamenteWhen the driver of the emergency vehicle connects the sirens (for being in an emergency situation), the transmitter will be connected simultaneously, which will emit a frequency (with a certain range), which will be picked up by the receivers incorporated in the others vehicles (vehicles that are within the range of the transmitter), and will automatically disconnect the radios
Cuando hava pasado el vehículo de emergencia y nuestro vehículo se encuentre fuera del alcance del emisor, los receptores automáticamente volverán a conectarse las autoradios de los vehículos sin que el conductor tenga que hacer absolutamente nada y pueda proseguir su camino Cuando el aparato vuelva a conectarse todo volverá a la normalidad v la memoria no se vera afectada en absolutoWhen the emergency vehicle has passed and our vehicle is out of reach of the transmitter, the receivers will automatically reconnect the car radios without the driver having to do anything and can continue on his way When the device reconnects everything it will return to normal and the memory will not be affected at all
DISPOSITIVO DE SEGURIDAD PARA VEHÍCULOS DE EMERGENCIASAFETY DEVICE FOR EMERGENCY VEHICLES
El presente modelo de utilidad, consta de dos circuitos principales 1 y 2, formados por un emisor instalado en los vehículos de emergencia, y un receptor instalado en el resto de vehículos que circulan por la vía publicaThis utility model consists of two main circuits 1 and 2, formed by a transmitter installed in emergency vehicles, and a receiver installed in the rest of vehicles that circulate on public roads
El circuito 1 , esta compuesto por un regulador de alimentación 9, encargado de adaptar la alimentación de los circuitos que componen el emisor Con la tensión deseada, alimentamos dos circuitos generadores de tono 15 y 16 (estos dos circuitos son simétricos, es decir son completamente iguales), cuya misión principal, es modular la señal con tonos de frecuencia especifica, de modo que el receptor 3 1 del circuito 2, actué únicamente con los tonos generados por los circuitos 15 y 16, asegurando la fiabilidad de que la activación del receptor se produzca solo con unas señales determinadas Las salidas de los circuitos 15 y 16 se mezclan, y van conectadas al modulo emisor 18 (modulo emisor de radiofrecuencia MOD TX-SAW 433/s-z homologado BZT LPD-D), que es el encargado de radiar la señal al circuito 2, acoplado mediante un transformador 19 a la antena 20 Al recibir la señal que envía el circuito 1, el circuito 2 desconecta las autoradios de los vehículos hasta que deje de recibir señal que le envía el circuito 1 (al no estar en el alcance de la frecuencia que emite)
Por su parte, el circiito 2 está formado al igual que el 1 por un regulador de alimentación 27. Con dicha ensión. alimentamos el módulo receptor 31 (Receptor de Datos 433,92 MHz homologado BZT LPD-D), que mediante una antena 28, es el encargado de recibir la señal que le envía el emisor, y de enviarla a dos circuitos decodificadores de tono 38 y 39, que son los encargados de comprobar que la señal que recibe el receptor es la que le envía el circuito 1 Los decodificadores comparan la señal, conectando a nivel bajo la entrada del comparador 40 Si su entrada es la correcta, pone a nivel alto su salida (hay corriente), activando de esta manera un circuito integrador 43, que es el encargado de dar un tiempo de retardo a la activación y desactivación de circuito 47, que mediante un relé, nos desconecta y conecta las autoradiosCircuit 1, is composed of a power regulator 9, responsible for adapting the power of the circuits that make up the transmitter With the desired voltage, we feed two tone generating circuits 15 and 16 (these two circuits are symmetrical, that is, they are completely same), whose main mission is to modulate the signal with specific frequency tones, so that the receiver 3 1 of circuit 2, act only with the tones generated by circuits 15 and 16, ensuring the reliability of the activation of the receiver occurs only with certain signals The outputs of circuits 15 and 16 are mixed, and are connected to the transmitter module 18 (radio frequency transmitter module MOD TX-SAW 433 / sz approved BZT LPD-D), which is responsible for radiating the signal to circuit 2, coupled by a transformer 19 to the antenna 20 Upon receiving the signal sent by circuit 1, circuit 2 disconnects the car radios until it stops receiving go signal sent by circuit 1 (not being within the range of the frequency it emits) On the other hand, the circuit 2 is formed like the 1 by a power regulator 27. With said ension. We supply the receiver module 31 (Data Receiver 433.92 MHz approved BZT LPD-D), which through an antenna 28, is responsible for receiving the signal sent by the transmitter, and for sending it to two tone decoder circuits 38 and 39, which are responsible for verifying that the signal received by the receiver is the one sent by circuit 1. The decoders compare the signal, connecting at low level the comparator input 40 If its input is correct, it sets its output (there is current), thus activating an integrator circuit 43, which is responsible for giving a delay time to the activation and deactivation of circuit 47, which by means of a relay, disconnects and connects the car radios
Con el objeto de comprender más fácilmente no solo la constitución sino también el uso propio del dispositivo de la invención, a continuación se refiere a un ejemplo práctico de realización, siendo dicha ejecución meramente enunciativa y en ningún caso limitativa de la misma, tal y como se muestra en los dibujos adjuntos, en los que se presentan dos circuitos En el primero podemos observar que al conectar las sirenas, automáticamente le llega la alimentación al circuito 1 mediante el punto 3, el cual va conectado a una inductancia filtro 4 para eliminar ruidos, y a un condensador 5 que actúa como filtro, y le filtra la señal que le llega al integrado 6 cuya misión es de regular la señal de salida a la tensión que nosotros queremos 8, y luego volver a ser filtrada por el condensador 7 Con dicha tensión alimentamos el conjunto de polarización y temporización 10, 1 1 y 12 que es el encargado de hacer funcionar los circuitos temporizadores 13 cuya misión es de modular unos tonos de frecuencia específicos Este circuito está compuesto por dos generadores de tono 15 y 16 (simétricos), las señales de los cuales se mezclan a través de dos resistencias (simétricas) limitadoras mezcladoras de señal 14 y van conectadas a la entrada del modulo emisor 17 La salida de dicho modulo, va conectada a un transformador Balum (equilibrado-desequilibrado) 19 , que nos sirve de adaptación a la antena emisora 20In order to more easily understand not only the constitution but also the proper use of the device of the invention, the following refers to a practical example of realization, said execution being merely enunciative and in no case limiting thereof, as It is shown in the attached drawings, in which two circuits are presented. In the first one we can see that when the sirens are connected, the power automatically arrives at circuit 1 through point 3, which is connected to a filter inductance 4 to eliminate noise , and a capacitor 5 that acts as a filter, and filters the signal that reaches the integrated 6 whose mission is to regulate the output signal to the voltage that we want 8, and then be filtered again by the capacitor 7 With said voltage we supply the polarization and timing set 10, 1 1 and 12 which is responsible for operating the timer circuits 13 whose mission is to modulate specific frequency tones This circuit is composed of two tone generators 15 and 16 (symmetric), the signals of which are mixed through two resistors (symmetrical) signal mixer 14 and connected to the input of the transmitter module 17 The output of said module is connected to a Balum transformer (balanced-unbalanced) 19, which adapts to the transmitting antenna 20
Al igual que el circuito 1, en el circuito 2, tenemos que poner un circuito regulador de tensión 27, el cual lleva los mismos componentes que el 9 una inductancia 22, un regulador de tensión 24 que en este caso es diferente al 6 (debido a que el circuito 2 está alimentado a una tensión 26 diferente al 1), y dos condensadores 23 y 25 Con dicha tensión alimentamos el módulo receptor 30, cuya entrada de señal se realiza mediante un condensador 51 en serie con la misma antena 28 que llevan los vehículos para conectar sus autoradios La salida del modulo se realiza mediante un condensador 29 que actúa como filtro de dos circuitos decodificadores de tono 38 y 39 (simétricos), cuyo circuito de polarización están compuestos por. dos resistencias 32 y 34, y tres condensadores 33, 36 y 37 Las salidas de ambos van conectadas a la entrada del circuito comparador 40, que al recibir la señal adecuada, alimenta a la red integradora de retardo 43 para la conexión y desconexión del relé 45, (enea' gado de cortar la alimentación de laLike circuit 1, in circuit 2, we have to put a voltage regulator circuit 27, which has the same components as 9 an inductance 22, a voltage regulator 24 which in this case is different from 6 (due to to which circuit 2 is fed to a voltage 26 different from 1), and two capacitors 23 and 25 With this voltage we supply the receiver module 30, whose signal input is made by a capacitor 51 in series with the same antenna 28 that carry the vehicles to connect their car radios The output of the module is carried out by means of a capacitor 29 that acts as a filter of two decoder circuits of tone 38 and 39 (symmetrical), whose polarization circuit is composed of. two resistors 32 and 34, and three capacitors 33, 36 and 37 The outputs of both are connected to the input of the comparator circuit 40, which, upon receiving the appropriate signal, feeds the delay integrator network 43 for connection and disconnection of the relay 45, (enea 'gado to cut off the power of the
HOJA SUSTITUTORIA REGLA 26
autoradio 50) Esta red está compuesta por- una resistencia 41 , un condensador 42 que cuando se activan, saturan a un transistor 46 cuya misión es de activar el relé, un diodo 44 (encargado de proteger el transistor), y el relé De dicho relé utilizaremos un contacto normalmente cerrado 48, que lo colocaremos en serie con el cable de energía eléctrica 49 del vehículo (controlado por el interruptor de encendido) y la autoradio 50 Esto hará que cuando el relé se active la autoradio se desconecte, y que cuando el relé se desactive la autoradio se vuelva a conectar automáticamente
SUBSTITUTE SHEET RULE 26 car radio 50) This network is composed of a resistor 41, a capacitor 42 that when activated, saturates a transistor 46 whose mission is to activate the relay, a diode 44 (responsible for protecting the transistor), and the relay of said relay will use a normally closed contact 48, which we will place in series with the vehicle's power cable 49 (controlled by the ignition switch) and the car radio 50 This will cause when the relay activates the car radio is disconnected, and when the relay deactivates the car radio automatically reconnects
Claims
1. DISPOSITIVO DE SEGURIDAD PARA VEHÍCULOS DE EMERGENCIA que desconecta las autoradios de los vehículos mediante dos circuitos, el circuito 1 lleva un circuito regulador de tensión 9 alimentado por las sirenas de los vehículos de emergencia que suministra la tensión deseada a dos circuitos generadores de tono 15 y 16 (codificadores) que mezclan sus señales y activan al modulo emisor 18, que mediante una antena, envía la señal a la antena del modulo receptor 31 del circuito 2, que a su vez también tiene un circuito regulador de tensión 27 que alimenta a dos circuitos decodificadores de tono 38 y 39 cuya señal de entrada es la del modulo receptor y su señal de salida descodificada es introducida a un comparador 40, encargado de comparar la señal que le envían los decodificadores y mandársela al circuito de retardo 43, que al cierto tiempo, activa el circuito 47 que controla la activación de un relé 45, que es el encargado mediante un contacto normalmente cerrado, de desconectar y de volver a conectar la autoradio cuando haya pasado el vehículo de emergencia.1. SAFETY DEVICE FOR EMERGENCY VEHICLES that disconnects car radios by two circuits, circuit 1 has a voltage regulator circuit 9 powered by the sirens of emergency vehicles that supplies the desired voltage to two tone generating circuits 15 and 16 (encoders) that mix their signals and activate the transmitter module 18, which by means of an antenna, sends the signal to the antenna of the receiver module 31 of circuit 2, which in turn also has a voltage regulator circuit 27 that feeds to two tone decoder circuits 38 and 39 whose input signal is that of the receiver module and its decoded output signal is introduced to a comparator 40, in charge of comparing the signal sent by the decoders and sending it to the delay circuit 43, which at the same time, it activates the circuit 47 that controls the activation of a relay 45, which is the one in charge through a normally closed contact, of connect and reconnect the car radio when the emergency vehicle has passed.
H H
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ES9903225U ES1044976Y (en) | 1999-12-16 | 1999-12-16 | "SAFETY DEVICE FOR EMERGENCY VEHICLES". |
| ESU9903225 | 1999-12-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2001045066A1 true WO2001045066A1 (en) | 2001-06-21 |
Family
ID=8311443
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/ES2000/000462 WO2001045066A1 (en) | 1999-12-16 | 2000-12-05 | Safety device for emergency vehicles |
Country Status (2)
| Country | Link |
|---|---|
| ES (1) | ES1044976Y (en) |
| WO (1) | WO2001045066A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2178965A1 (en) * | 2001-04-21 | 2003-01-01 | Tester Javier Olcina | Security device for in-service emergency vehicles |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4238778A (en) * | 1977-09-12 | 1980-12-09 | Kinya Ohsumi | System for warning the approach of an emergency vehicle |
| US4296496A (en) * | 1974-07-03 | 1981-10-20 | Sadler William S | Emergency radio frequency warning device |
| DE3633368A1 (en) * | 1986-10-01 | 1988-04-14 | Kurt Marko | Transmission system for switching off sources of sound in motor vehicles when an emergency vehicle approaches |
| US5278553A (en) * | 1991-10-04 | 1994-01-11 | Robert H. Cornett | Apparatus for warning of approaching emergency vehicle and method of warning motor vehicle operators of approaching emergency vehicles |
-
1999
- 1999-12-16 ES ES9903225U patent/ES1044976Y/en not_active Expired - Lifetime
-
2000
- 2000-12-05 WO PCT/ES2000/000462 patent/WO2001045066A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4296496A (en) * | 1974-07-03 | 1981-10-20 | Sadler William S | Emergency radio frequency warning device |
| US4238778A (en) * | 1977-09-12 | 1980-12-09 | Kinya Ohsumi | System for warning the approach of an emergency vehicle |
| DE3633368A1 (en) * | 1986-10-01 | 1988-04-14 | Kurt Marko | Transmission system for switching off sources of sound in motor vehicles when an emergency vehicle approaches |
| US5278553A (en) * | 1991-10-04 | 1994-01-11 | Robert H. Cornett | Apparatus for warning of approaching emergency vehicle and method of warning motor vehicle operators of approaching emergency vehicles |
Also Published As
| Publication number | Publication date |
|---|---|
| ES1044976U (en) | 2000-07-01 |
| ES1044976Y (en) | 2000-12-16 |
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