FR2565727B1 - ELECTRONIC WARNING DEVICE, ESPECIALLY FOR MOTOR VEHICLES. - Google Patents
ELECTRONIC WARNING DEVICE, ESPECIALLY FOR MOTOR VEHICLES.Info
- Publication number
- FR2565727B1 FR2565727B1 FR8507775A FR8507775A FR2565727B1 FR 2565727 B1 FR2565727 B1 FR 2565727B1 FR 8507775 A FR8507775 A FR 8507775A FR 8507775 A FR8507775 A FR 8507775A FR 2565727 B1 FR2565727 B1 FR 2565727B1
- Authority
- FR
- France
- Prior art keywords
- motor vehicles
- warning device
- electronic warning
- electronic
- vehicles
- 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.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
- B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
- B06B1/0207—Driving circuits
- B06B1/0223—Driving circuits for generating signals continuous in time
- B06B1/0269—Driving circuits for generating signals continuous in time for generating multiple frequencies
- B06B1/0284—Driving circuits for generating signals continuous in time for generating multiple frequencies with consecutive, i.e. sequential generation, e.g. with frequency sweep
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Emergency Alarm Devices (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19843420988 DE3420988A1 (en) | 1984-06-06 | 1984-06-06 | Electronic warning signal system especially for motor vehicles |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2565727A1 FR2565727A1 (en) | 1985-12-13 |
FR2565727B1 true FR2565727B1 (en) | 1987-12-18 |
Family
ID=6237709
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR8507775A Expired FR2565727B1 (en) | 1984-06-06 | 1985-05-23 | ELECTRONIC WARNING DEVICE, ESPECIALLY FOR MOTOR VEHICLES. |
Country Status (3)
Country | Link |
---|---|
DE (1) | DE3420988A1 (en) |
FR (1) | FR2565727B1 (en) |
IT (1) | IT1184563B (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0162143U (en) * | 1987-04-30 | 1989-04-20 | ||
IT1228767B (en) * | 1989-03-29 | 1991-07-03 | Electronsystem Spa | ELECTRONICALLY PILOTED HORN FOR MOTOR VEHICLES. |
CN101901596B (en) * | 2010-08-18 | 2012-09-19 | 王伟东 | Touch type horn system with counting function |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2518708B1 (en) * | 1975-04-26 | 1976-02-26 | Wandel & Goltermann | Mobile electro-acoustic alarm system, so-called electronic police horn |
FR2333314A1 (en) * | 1975-11-27 | 1977-06-24 | Klaxon Sa | Loudspeaker supply circuit for acoustic alarm - provides two signals with given frequency ratio using mixer system |
DE2554940C2 (en) * | 1975-12-06 | 1977-12-29 | Westfälische Metall Industrie KG, Hueck & Co, 4780 Lippstadt | Acoustic signal transmitter for motor vehicles |
DE2905534C2 (en) * | 1975-12-06 | 1987-04-30 | Hella KG Hueck & Co, 4780 Lippstadt | Acoustic signaling device for motor vehicles |
JPS57210395A (en) * | 1981-06-19 | 1982-12-23 | Ricoh Kk | Piezo-electric buzzer driving system |
-
1984
- 1984-06-06 DE DE19843420988 patent/DE3420988A1/en not_active Ceased
-
1985
- 1985-05-23 FR FR8507775A patent/FR2565727B1/en not_active Expired
- 1985-06-04 IT IT8521015A patent/IT1184563B/en active
Also Published As
Publication number | Publication date |
---|---|
FR2565727A1 (en) | 1985-12-13 |
DE3420988A1 (en) | 1985-12-12 |
IT8521015A0 (en) | 1985-06-04 |
IT1184563B (en) | 1987-10-28 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |