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GB2296365A - Sounder - Google Patents

Sounder

Info

Publication number
GB2296365A
GB2296365A GB9603219A GB9603219A GB2296365A GB 2296365 A GB2296365 A GB 2296365A GB 9603219 A GB9603219 A GB 9603219A GB 9603219 A GB9603219 A GB 9603219A GB 2296365 A GB2296365 A GB 2296365A
Authority
GB
United Kingdom
Prior art keywords
coil
drive
sounder
power
circuit
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.)
Granted
Application number
GB9603219A
Other versions
GB9603219D0 (en
GB2296365B (en
Inventor
Stephen Timothy Hughes
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.)
Eaton Electrical Products Ltd
Original Assignee
Fulleon Synchrobell Ltd
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
Priority claimed from GB939317012A external-priority patent/GB9317012D0/en
Application filed by Fulleon Synchrobell Ltd filed Critical Fulleon Synchrobell Ltd
Priority to GB9603219A priority Critical patent/GB2296365B/en
Publication of GB9603219D0 publication Critical patent/GB9603219D0/en
Publication of GB2296365A publication Critical patent/GB2296365A/en
Application granted granted Critical
Publication of GB2296365B publication Critical patent/GB2296365B/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)

Abstract

A sounder has a drive coil (40) which receives a varying signal from a drive circuit. The magnetic field resulting therefrom drives an armature (12) which is mounted on a diaphragm (10) which produces sound due to the vibration thereof. A second coil (42) is magnetically and electrically connected to the drive coil (40). A diode (D1) is connected in series with the second coil and is arranged such that no current flows in the second coil (42) when the drive signal (which is unipolar) generates a current in the drive coil (40). When the drive signal is cut off, a current flows in the second coil (42) and charge is stored in a capacitor C1. The energy thus stored may be used to power the drive circuit. In this way, the power used by the sounder corresponds to the losses in the circuit and due to the acoustic power radiated by the sounder. Since this is only a small proportion of the power needed to drive the drive coil (40), the sounder is efficient. <IMAGE>
GB9603219A 1993-08-16 1994-08-16 Sounder Expired - Lifetime GB2296365B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9603219A GB2296365B (en) 1993-08-16 1994-08-16 Sounder

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB939317012A GB9317012D0 (en) 1993-08-16 1993-08-16 Sounder
PCT/GB1994/001792 WO1995005654A1 (en) 1993-08-16 1994-08-16 Sounder
GB9603219A GB2296365B (en) 1993-08-16 1994-08-16 Sounder

Publications (3)

Publication Number Publication Date
GB9603219D0 GB9603219D0 (en) 1996-04-17
GB2296365A true GB2296365A (en) 1996-06-26
GB2296365B GB2296365B (en) 1997-01-15

Family

ID=26303388

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9603219A Expired - Lifetime GB2296365B (en) 1993-08-16 1994-08-16 Sounder

Country Status (1)

Country Link
GB (1) GB2296365B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997048253A1 (en) * 1996-06-07 1997-12-18 Panphonics Oy Electroacoustic transducer

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3916373A (en) * 1973-11-17 1975-10-28 Int Standard Electric Corp Ultrasonic transmitter for the remote control of radio and television receivers
DE2823155A1 (en) * 1977-05-26 1978-12-07 Seikosha Kk ELECTRIC CONTROL CIRCUIT FOR A PIEZOELECTRIC TRANSDUCER
EP0054703A1 (en) * 1980-12-23 1982-06-30 Siemens Aktiengesellschaft Circuit for a piezoelectric positioning element and the like

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3916373A (en) * 1973-11-17 1975-10-28 Int Standard Electric Corp Ultrasonic transmitter for the remote control of radio and television receivers
DE2823155A1 (en) * 1977-05-26 1978-12-07 Seikosha Kk ELECTRIC CONTROL CIRCUIT FOR A PIEZOELECTRIC TRANSDUCER
EP0054703A1 (en) * 1980-12-23 1982-06-30 Siemens Aktiengesellschaft Circuit for a piezoelectric positioning element and the like

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997048253A1 (en) * 1996-06-07 1997-12-18 Panphonics Oy Electroacoustic transducer
US6570818B1 (en) 1996-06-07 2003-05-27 Panphonics Oy Electroacoustic transducer

Also Published As

Publication number Publication date
GB9603219D0 (en) 1996-04-17
GB2296365B (en) 1997-01-15

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Legal Events

Date Code Title Description
PE20 Patent expired after termination of 20 years

Expiry date: 20140815