WO1997005601A1 - Audible warning device with a built-in interference suppressing device - Google Patents
Audible warning device with a built-in interference suppressing device Download PDFInfo
- Publication number
- WO1997005601A1 WO1997005601A1 PCT/FR1996/001170 FR9601170W WO9705601A1 WO 1997005601 A1 WO1997005601 A1 WO 1997005601A1 FR 9601170 W FR9601170 W FR 9601170W WO 9705601 A1 WO9705601 A1 WO 9705601A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- breaker
- warning device
- rivet
- audible warning
- varistor
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
- G10K9/12—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated
- G10K9/13—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated using electromagnetic driving means
- G10K9/15—Self-interrupting arrangements
Definitions
- the present invention relates to audible warning devices, in particular for the equipment of land vehicles.
- Known horns present on the market, comprise a coil in the air gap from which a plunger core secured to a membrane can move, the vibration of which produces a sound.
- the electrical supply to the coil takes place via a breaker, the opening and closing of which control the reciprocating movement of the diaphragm.
- This electric arc renewed at the operating frequency of the horn, provides a very wide spectrum parasitic radio signal. Such a signal may prove harmful to other equipment, in particular electronic equipment, of the vehicle.
- the object of the present invention is to remedy the above-mentioned drawbacks of known audible warning devices and to this end it proposes to modify these known warning devices which, without complicating the production of the alarm or significantly increasing the cost thereof, makes it possible to avoid any harmful effect of the alarm, during the operation of the latter, on particularly electronic equipment including the carrier vehicle is provided.
- the audible warning device is of the type comprising, inside a metallic envelope closed by a flexible membrane integral with a plunger core, a coil into which said plunger core can be inserted and a breaker of which the upper and lower arms are insulated so as to come into contact only through their contact parts, the breaker being mounted on said casing by a rivet isolated from the latter.
- It is characterized by a varistor mounted at the terminals of the switch and whose effect suppresses the parasitic signal generated by the electric arc produced at each opening of the contact parts of the switch.
- the metallized varistor on each face is mounted on the body of the rivet while being isolated from the latter, and is pressed between the two arms of the breaker, opposite to said contact parts, making contact with each. said arms.
- the washer forming the varistor is isolated from the rivet, on which it is mounted, by an extension of the carcass of the coil.
- the invention provides for the stiffening of the upper arm of the breaker so that, during riveting, the pressure of the rivet is applied to the varistor ceramic in a uniform and plane manner (that is to say without cantilever) ).
- the shoulder presented by the plunger core and intended to engage the lower arm of the contact breaker, to separate the contact parts from the latter carries an insulating washer, preferably forcibly engaged in a throat of the plunger core.
- the lower arm of the switch is at an electrical potential equal to that of the input pad, while the plunger core is at the electrical potential of the envelope of the horn, c that is to say to the mass of the user vehicle. It is therefore essential, under penalty of short circuit, that the plunger core does not come into electrical contact with the lower arm of the contact breaker.
- Figure 1 is a partially vertical sectional view of the actuating part of a conventional horn
- Figure 2 is a view similar to Figure 1, of the actuating portion of an improved horn according to the present invention
- FIG. 3 is a larger view of a detail of FIG. 2, showing in particular the interrupter of the horn.
- Figure 1 there is shown the actuating part of a conventional horn.
- It comprises a metal casing 1 closed at its front part by an elastic metal membrane 2.
- the metal casing 1 is provided with a fixed core 3 engaged in the center of the carcass 4 with a coil 5.
- a plunger core 6, integral with the membrane 2, is located opposite the fixed core 3.
- a breaker 7 comprising an upper arm 8 and a lower arm 9 between which is mounted an insulating part
- the breaker 7 is fixed by a rivet 13 forming a tongue, which passes through the casing 1, the casing 4, the arm 9, the insulating part 10 and the arm 8, being isolated by an insulating washer 14, from the body mass 1.
- the tongue of the rivet 13 serves as an input for the electric current.
- the lower arm 9 of the breaker 7 is in electrical contact with the input wire 15 of the coil 5, but is isolated from the rivet 13.
- the output wire 16 of the coil 5 is electrically connected, by means of a metal washer 17, to a rivet 18 forming an output tab, which assembles the carcass 4 to the casing 1, an insulating washer 19 insulating the rivet 18 from the mass of the casing 1.
- a varistor is mounted across the terminals of the breaker 7.
- This varistor produced in the form of a washer 21 (that is to say a disc provided with a central hole and on the opposite faces of which the electrical contacts are made by simple pressure), is mounted on the rivet 13 between the upper breaker 8 and lower breaker 9 arms by replacing the breaker insulation 10 of the conventional device of FIG. 1.
- the carcass 4 of the winding 5 then has a centering stud 22 disposed between the rivet 13 and the varistor 21.
- the shoulder 20 of the plunger core 6 is fitted with an insulating washer 23 forcibly mounted in a groove 24 in the core 6.
- the lower arm 9 of the breaker 7 is, during certain phases of the operating cycle, at an electrical potential equal to that of the input tab 13.
- the plunger core 6 is itself at the potential of the casing 1 the mechanical mounting of which on the chassis of the user vehicle will have the effect of fixing the potential to ground, that is to say at least of the battery. It is therefore essential, under penalty of short circuit, that none of the elements of the breaker 7, and in particular the lower arm 9 thereof, is in electrical contact with one of the elements of the metal casing 1 of the horn , including membrane 2 and plunger 6
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Burglar Alarm Systems (AREA)
- Breakers (AREA)
- Emergency Alarm Devices (AREA)
- Train Traffic Observation, Control, And Security (AREA)
- Arc-Extinguishing Devices That Are Switches (AREA)
- Fire Alarms (AREA)
- Fire-Detection Mechanisms (AREA)
- Alarm Systems (AREA)
- Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
- Catching Or Destruction (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DK96926460T DK0843873T3 (en) | 1995-07-26 | 1996-07-25 | Acoustic alarm sensor with built-in noise canceling device |
AU66632/96A AU6663296A (en) | 1995-07-26 | 1996-07-25 | Audible warning device with a built-in interference suppressing device |
EP96926460A EP0843873B1 (en) | 1995-07-26 | 1996-07-25 | Audible warning device with a built-in interference suppressing device |
DE69604811T DE69604811T2 (en) | 1995-07-26 | 1996-07-25 | SIGNAL HORN WITH BUILT-IN REMOVAL AGENTS |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9509066A FR2737334B1 (en) | 1995-07-26 | 1995-07-26 | AUDIBLE ALARM WITH BUILT-IN PEST CONTROL DEVICE |
FR95/09066 | 1995-07-26 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1997005601A1 true WO1997005601A1 (en) | 1997-02-13 |
Family
ID=9481389
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR1996/001170 WO1997005601A1 (en) | 1995-07-26 | 1996-07-25 | Audible warning device with a built-in interference suppressing device |
Country Status (9)
Country | Link |
---|---|
EP (1) | EP0843873B1 (en) |
AT (1) | ATE185922T1 (en) |
AU (1) | AU6663296A (en) |
DE (1) | DE69604811T2 (en) |
DK (1) | DK0843873T3 (en) |
ES (1) | ES2141522T3 (en) |
FR (1) | FR2737334B1 (en) |
PT (1) | PT843873E (en) |
WO (1) | WO1997005601A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2158815A1 (en) * | 1998-11-20 | 2001-09-01 | Bosch Gmbh Robert | Acoustic signal source for automobile has interference suppression components mounted on insulating circuit board with contact pads for connection to electrical circuit of acoustic signal source |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2910167A1 (en) * | 2006-12-14 | 2008-06-20 | Composants Electr Sa Soc D | Horn for motor vehicle, has movable core coupled to oscillating membrane and defining air gap with fixed core, and casing enclosing ferromagnetic element forming shunt to channalize electromagnetic flux to confine flux near coil |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB349183A (en) * | 1929-03-18 | 1931-05-28 | Moto Meter Gauge & Equip Corp | Improvements in audible traffic signal or warning devices |
US2145711A (en) * | 1934-04-19 | 1939-01-31 | Gen Motors Corp | Sounding signal device |
US2598994A (en) * | 1949-07-28 | 1952-06-03 | Russell A Gougeon | Electromagnetically operated signal producing resonator device |
DE3123877C1 (en) * | 1981-06-16 | 1983-02-24 | Siemens AG, 1000 Berlin und 8000 München | Electrolytic cell shunting switch - with parallel connected varistor as energy absorber to prevent contact burn-up |
EP0237727A2 (en) * | 1986-03-15 | 1987-09-23 | Hella KG Hueck & Co. | Electromagnetic signal horn |
-
1995
- 1995-07-26 FR FR9509066A patent/FR2737334B1/en not_active Expired - Fee Related
-
1996
- 1996-07-25 DK DK96926460T patent/DK0843873T3/en active
- 1996-07-25 ES ES96926460T patent/ES2141522T3/en not_active Expired - Lifetime
- 1996-07-25 WO PCT/FR1996/001170 patent/WO1997005601A1/en active IP Right Grant
- 1996-07-25 PT PT96926460T patent/PT843873E/en unknown
- 1996-07-25 DE DE69604811T patent/DE69604811T2/en not_active Expired - Fee Related
- 1996-07-25 AU AU66632/96A patent/AU6663296A/en not_active Abandoned
- 1996-07-25 AT AT96926460T patent/ATE185922T1/en not_active IP Right Cessation
- 1996-07-25 EP EP96926460A patent/EP0843873B1/en not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB349183A (en) * | 1929-03-18 | 1931-05-28 | Moto Meter Gauge & Equip Corp | Improvements in audible traffic signal or warning devices |
US2145711A (en) * | 1934-04-19 | 1939-01-31 | Gen Motors Corp | Sounding signal device |
US2598994A (en) * | 1949-07-28 | 1952-06-03 | Russell A Gougeon | Electromagnetically operated signal producing resonator device |
DE3123877C1 (en) * | 1981-06-16 | 1983-02-24 | Siemens AG, 1000 Berlin und 8000 München | Electrolytic cell shunting switch - with parallel connected varistor as energy absorber to prevent contact burn-up |
EP0237727A2 (en) * | 1986-03-15 | 1987-09-23 | Hella KG Hueck & Co. | Electromagnetic signal horn |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2158815A1 (en) * | 1998-11-20 | 2001-09-01 | Bosch Gmbh Robert | Acoustic signal source for automobile has interference suppression components mounted on insulating circuit board with contact pads for connection to electrical circuit of acoustic signal source |
Also Published As
Publication number | Publication date |
---|---|
FR2737334B1 (en) | 1997-10-17 |
DE69604811T2 (en) | 2000-06-29 |
ES2141522T3 (en) | 2000-03-16 |
EP0843873B1 (en) | 1999-10-20 |
DK0843873T3 (en) | 2000-04-25 |
PT843873E (en) | 2000-04-28 |
ATE185922T1 (en) | 1999-11-15 |
FR2737334A1 (en) | 1997-01-31 |
AU6663296A (en) | 1997-02-26 |
EP0843873A1 (en) | 1998-05-27 |
DE69604811D1 (en) | 1999-11-25 |
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