GB1480694A - Electromagnetic signal horn - Google Patents

Electromagnetic signal horn

Info

Publication number
GB1480694A
GB1480694A GB3891375A GB3891375A GB1480694A GB 1480694 A GB1480694 A GB 1480694A GB 3891375 A GB3891375 A GB 3891375A GB 3891375 A GB3891375 A GB 3891375A GB 1480694 A GB1480694 A GB 1480694A
Authority
GB
United Kingdom
Prior art keywords
coil
sensor
astable
multivibrator
armature
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
Application number
GB3891375A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of GB1480694A publication Critical patent/GB1480694A/en
Expired legal-status Critical Current

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
    • B06B1/0238—Driving circuits for generating signals continuous in time of a single frequency, e.g. a sine-wave
    • B06B1/0246—Driving circuits for generating signals continuous in time of a single frequency, e.g. a sine-wave with a feedback signal
    • B06B1/0261—Driving circuits for generating signals continuous in time of a single frequency, e.g. a sine-wave with a feedback signal taken from a transducer or electrode connected to the driving transducer
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
    • H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
    • H03K3/26—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback
    • H03K3/28—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using means other than a transformer for feedback
    • H03K3/281—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using means other than a transformer for feedback using at least two transistors so coupled that the input of one is derived from the output of another, e.g. multivibrator
    • H03K3/282—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using means other than a transformer for feedback using at least two transistors so coupled that the input of one is derived from the output of another, e.g. multivibrator astable
    • H03K3/2823—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using means other than a transformer for feedback using at least two transistors so coupled that the input of one is derived from the output of another, e.g. multivibrator astable using two active transistor of the same conductivity type
    • 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
    • B06B2201/00—Indexing scheme associated with B06B1/0207 for details covered by B06B1/0207 but not provided for in any of its subgroups
    • B06B2201/50—Application to a particular transducer type
    • B06B2201/52—Electrodynamic transducer
    • B06B2201/53—Electrodynamic transducer with vibrating magnet or coil

Abstract

1480694 Signal horns ROBERT BOSCH GmbH 23 Sept 1975 [23 Sept 1974] 38913/75 Heading G5J An electromagnetic signal horn has a vibrating armature 14 fixed to a diaphragm 12; an electromagnet 15 with coil 16; a sensor 20 producing pulses in dependance on the position of the armature 14; a contactless switching device 49; and a multivibrator, the switching device 49 being arranged to interrupt current to the coil 16 for a period determined by the multivibrator each time a pulse is produced by the sensor 20. The sensor comprises a coil 21 which senses leakage flux #<SP>1</SP>; when the armature 14 engages the magnet 15 the leakage flux disappears inducing a voltage pulse in coil 21. In Fig. 3 the pulses are applied to trigger an astable multivibrator 23, shortening its natural period. The astable feeds a monostable 24 which determines the period of interruption. If the sensor is damaged and the pulses disappear the multivibator will operate the horn at a lower frequency ensuring the coil 16 is not damaged by the continuous current. The circuit may be simplified by omitting either the astable or monostable.
GB3891375A 1974-09-23 1975-09-23 Electromagnetic signal horn Expired GB1480694A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19742445344 DE2445344C3 (en) 1974-09-23 1974-09-23 Electromagnetic horn

Publications (1)

Publication Number Publication Date
GB1480694A true GB1480694A (en) 1977-07-20

Family

ID=5926494

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3891375A Expired GB1480694A (en) 1974-09-23 1975-09-23 Electromagnetic signal horn

Country Status (4)

Country Link
DE (1) DE2445344C3 (en)
FR (1) FR2285674A1 (en)
GB (1) GB1480694A (en)
IT (1) IT1044627B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0452427A1 (en) * 1989-11-03 1991-10-23 Sparton Corp Electric horn with solid state driver.

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE435777B (en) * 1979-01-29 1984-10-15 Ibuki Kogyo Co Ltd ELECTRIC HORN
IT1228767B (en) * 1989-03-29 1991-07-03 Electronsystem Spa ELECTRONICALLY PILOTED HORN FOR MOTOR VEHICLES.
CN109859963B (en) * 2019-01-24 2020-06-16 西安维国电子科技有限公司 Integrated electromagnetic drive switch for subnanosecond square wave generator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0452427A1 (en) * 1989-11-03 1991-10-23 Sparton Corp Electric horn with solid state driver.
EP0452427A4 (en) * 1989-11-03 1992-05-13 Sparton Corporation Electric horn with solid state driver

Also Published As

Publication number Publication date
FR2285674A1 (en) 1976-04-16
IT1044627B (en) 1980-04-21
FR2285674B3 (en) 1978-04-07
DE2445344B2 (en) 1980-01-31
DE2445344A1 (en) 1976-04-08
DE2445344C3 (en) 1980-10-09

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee