IT1034913B - PROCEDURE AND DEVICE FOR EXCITING THE CONTROL COILS OF ACOUSTIC SIGNALING DEVICES - Google Patents

PROCEDURE AND DEVICE FOR EXCITING THE CONTROL COILS OF ACOUSTIC SIGNALING DEVICES

Info

Publication number
IT1034913B
IT1034913B IT2209075A IT2209075A IT1034913B IT 1034913 B IT1034913 B IT 1034913B IT 2209075 A IT2209075 A IT 2209075A IT 2209075 A IT2209075 A IT 2209075A IT 1034913 B IT1034913 B IT 1034913B
Authority
IT
Italy
Prior art keywords
exciting
procedure
signaling devices
control coils
acoustic signaling
Prior art date
Application number
IT2209075A
Other languages
Italian (it)
Original Assignee
Rowland Absalom Penelope Gay
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 Rowland Absalom Penelope Gay filed Critical Rowland Absalom Penelope Gay
Application granted granted Critical
Publication of IT1034913B publication Critical patent/IT1034913B/en

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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/30—Modifications for providing a predetermined threshold before switching
    • H03K17/305—Modifications for providing a predetermined threshold before switching in thyristor switches

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Amplifiers (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
IT2209075A 1974-04-09 1975-04-08 PROCEDURE AND DEVICE FOR EXCITING THE CONTROL COILS OF ACOUSTIC SIGNALING DEVICES IT1034913B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1567874A GB1456426A (en) 1974-04-09 1974-04-09 Circuit arrangement for exciting audible devices

Publications (1)

Publication Number Publication Date
IT1034913B true IT1034913B (en) 1979-10-10

Family

ID=10063456

Family Applications (1)

Application Number Title Priority Date Filing Date
IT2209075A IT1034913B (en) 1974-04-09 1975-04-08 PROCEDURE AND DEVICE FOR EXCITING THE CONTROL COILS OF ACOUSTIC SIGNALING DEVICES

Country Status (4)

Country Link
CA (1) CA1016373A (en)
DE (1) DE2515123A1 (en)
GB (1) GB1456426A (en)
IT (1) IT1034913B (en)

Also Published As

Publication number Publication date
GB1456426A (en) 1976-11-24
CA1016373A (en) 1977-08-30
DE2515123A1 (en) 1975-10-23

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