GB279878A - Improvements in ultra-audible transmitting and receiving apparatus - Google Patents

Improvements in ultra-audible transmitting and receiving apparatus

Info

Publication number
GB279878A
GB279878A GB28618/27A GB2861827A GB279878A GB 279878 A GB279878 A GB 279878A GB 28618/27 A GB28618/27 A GB 28618/27A GB 2861827 A GB2861827 A GB 2861827A GB 279878 A GB279878 A GB 279878A
Authority
GB
United Kingdom
Prior art keywords
piezo
vibration
electric
source
emitting surface
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
GB28618/27A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB279878A publication Critical patent/GB279878A/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
    • B06B1/06—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction
    • B06B1/0607—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using multiple elements
    • B06B1/0622—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using multiple elements on one surface
    • B06B1/0625—Annular array
    • 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
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/18—Methods or devices for transmitting, conducting or directing sound
    • G10K11/26—Sound-focusing or directing, e.g. scanning
    • G10K11/34—Sound-focusing or directing, e.g. scanning using electrical steering of transducer arrays, e.g. beam steering
    • G10K11/341—Circuits therefor
    • G10K11/348—Circuits therefor using amplitude variation

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Mechanical Engineering (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)
  • Transducers For Ultrasonic Waves (AREA)

Abstract

279,878. Langevin, P. Jan. 27, 1926, [Convention date]. Piezo-electric instruments. - In connection with vibration-emitters, more particularly of the piezo-electric type, means are provided for preventing the secondary maxima of intensity in the external medium at points on either side of the line normal to the emitting surface, such secondary maxima occurring due to interference effects when the amplitude of vibration at the source is uniform over the whole area. According to one arrangement, the emitting surface is divided into a number of areas, the different areas being connected to different potentials so that the resultant amplitude distribution over the surface is of a predetermined kind and is such that at a distance from the source only one maximum (along the normal direction) will be observed. In order to investigate the amplitude distribution along the surface a<2>, a small resonating piezo-electric crystal g, fitted with a gold-leaf h may be employed. Specification 265,181 is referred to.
GB28618/27A 1926-01-27 1927-01-19 Improvements in ultra-audible transmitting and receiving apparatus Expired GB279878A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR279878X 1926-01-27

Publications (1)

Publication Number Publication Date
GB279878A true GB279878A (en) 1928-03-08

Family

ID=8886699

Family Applications (1)

Application Number Title Priority Date Filing Date
GB28618/27A Expired GB279878A (en) 1926-01-27 1927-01-19 Improvements in ultra-audible transmitting and receiving apparatus

Country Status (1)

Country Link
GB (1) GB279878A (en)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2419197A (en) * 1940-05-03 1947-04-22 Submarine Signal Co Electroacoustic transducer
US2420676A (en) * 1943-01-23 1947-05-20 Submarine Signal Co Submarine signaling apparatus
US2423459A (en) * 1942-09-15 1947-07-08 Bell Telephone Labor Inc Frequency selective apparatus
US2427062A (en) * 1944-06-02 1947-09-09 Brush Dev Co Vibrational energy transmitter or receiver
US2434278A (en) * 1943-03-04 1948-01-13 Bell Telephone Labor Inc Submarine detecting device
US2437282A (en) * 1942-11-18 1948-03-09 Submarine Signal Co Electroacoustical transducer
US2438936A (en) * 1943-10-06 1948-04-06 Bell Telephone Labor Inc Electromechanical transducer
US2450104A (en) * 1942-11-30 1948-09-28 Rca Corp Electroacoustical transducer
US2451967A (en) * 1944-06-02 1948-10-19 Brush Dev Co Vibrational energy transmitter or receiver
US2452068A (en) * 1943-01-23 1948-10-26 Submarine Signal Co Sound pickup device
US2452570A (en) * 1933-05-05 1948-11-02 Submarine Signal Co Compressional wave transmitting and receiving device
DE759295C (en) * 1940-11-28 1952-12-15 Telefunken Gmbh Arrangement for delaying an electrical signal
US2837728A (en) * 1945-12-14 1958-06-03 Schuck Oscar Hugo Means to alter the directivity pattern of energy translating devices

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2452570A (en) * 1933-05-05 1948-11-02 Submarine Signal Co Compressional wave transmitting and receiving device
US2419197A (en) * 1940-05-03 1947-04-22 Submarine Signal Co Electroacoustic transducer
DE759295C (en) * 1940-11-28 1952-12-15 Telefunken Gmbh Arrangement for delaying an electrical signal
US2423459A (en) * 1942-09-15 1947-07-08 Bell Telephone Labor Inc Frequency selective apparatus
US2437282A (en) * 1942-11-18 1948-03-09 Submarine Signal Co Electroacoustical transducer
US2450104A (en) * 1942-11-30 1948-09-28 Rca Corp Electroacoustical transducer
US2452068A (en) * 1943-01-23 1948-10-26 Submarine Signal Co Sound pickup device
US2420676A (en) * 1943-01-23 1947-05-20 Submarine Signal Co Submarine signaling apparatus
US2434278A (en) * 1943-03-04 1948-01-13 Bell Telephone Labor Inc Submarine detecting device
US2438936A (en) * 1943-10-06 1948-04-06 Bell Telephone Labor Inc Electromechanical transducer
US2451967A (en) * 1944-06-02 1948-10-19 Brush Dev Co Vibrational energy transmitter or receiver
US2427062A (en) * 1944-06-02 1947-09-09 Brush Dev Co Vibrational energy transmitter or receiver
US2837728A (en) * 1945-12-14 1958-06-03 Schuck Oscar Hugo Means to alter the directivity pattern of energy translating devices

Similar Documents

Publication Publication Date Title
GB279878A (en) Improvements in ultra-audible transmitting and receiving apparatus
CH293582A (en) Device for modulating ultra-short waves connected to at least one consumer.
CH291953A (en) Device for generating an amplitude-modulated wave.
CH293581A (en) Single sideband signal transmission system with a completely suppressed carrier wave and two auxiliary frequency sidebands.
CH269675A (en) Device for impedance transformation in the transmission of electromagnetic ultra-high frequency waves through wave guides.
FR63488E (en) Device for generating, amplifying or modulating millimeter waves
CH307828A (en) Device for the amplitude modulation of an ultra-high frequency oscillation passing through a waveguide.
CH229323A (en) Device for transforming frequency-modulated vibrations into amplitude-modulated vibrations of the desired frequency.
CH298708A (en) Device for ultra-short wave amplitude modulation.
FR1077340A (en) Transmitting device for frequency slip telegraphy
SU50434A1 (en) Generator device
CA481824A (en) Apparatus for amplitude modulating high-frequency oscillations
CA470836A (en) Modulator arrangements for carrier wave telegraphy and telephony
GB165994A (en) Improvements in or connected with wireless telephony and telegraphy
CA482023A (en) Device for generating high-frequency electrical oscillations
JPS5250699A (en) Radar apparatus
AU209051A (en) Improvements in or relating to electromagnetic devices for amplitude-modulation ofa high-frequency oscillation
FR884814A (en) Device for amplifying or generating very high frequency electrical oscillations
GB318328A (en) Improved means of wireless reception
CA476490A (en) Arrangements for modulating continuous waves
AU156740B2 (en) Electronic ringing frequency generator
CH307464A (en) Device with a cathode ray tube for very high frequencies.
GB269996A (en) Improvements relating to electric signalling systems employing carrier waves
CA471413A (en) Means for generating time modulated electrical pulses
CA488015A (en) Circuit arrangement for generating phase-modulated oscillations