US2847516A - Transducer - Google Patents

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Publication number
US2847516A
US2847516A US350594A US35059453A US2847516A US 2847516 A US2847516 A US 2847516A US 350594 A US350594 A US 350594A US 35059453 A US35059453 A US 35059453A US 2847516 A US2847516 A US 2847516A
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US
United States
Prior art keywords
electrode
voltage
frequency
transformer
earthed
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 - Lifetime
Application number
US350594A
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English (en)
Inventor
Klein Siegfried
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.)
CHARLES LEGORJU
Original Assignee
CHARLES LEGORJU
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 CHARLES LEGORJU filed Critical CHARLES LEGORJU
Application granted granted Critical
Publication of US2847516A publication Critical patent/US2847516A/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R23/00—Transducers other than those covered by groups H04R9/00 - H04R21/00
    • H04R23/004—Transducers other than those covered by groups H04R9/00 - H04R21/00 using ionised gas

Definitions

  • the apparatus air and produces the will reproduce without any difficulty the sharpest or highest-pitched sounds, provided of course that a suitable horn is available.
  • a novel feature consists essentially in that the highfrequency high-voltage transformer is integral with the emitter device and constitutes therewith a complete selfcontained unit adapted to be electrically connected to a high-frequency low-voltage oscillator.
  • this high-frequency high-voltage transformer is disposed around the emitter electrode, thereby permitting not only to reduce the longitudinal dimensions of the apparatus but also to dispense with the cage-like element constituting the other electrode mounted around the emitter point, this other electrode consisting in the present instance of one winding of said transformer.
  • the emitter electrode is grounded and the other electrode is constituted by the secondary winding of the high-frequency high-voltage transformer; with this arrangement it is possible notably touse the low-voltage current for heating the emitter electrode, this solution affording several advantages.
  • the high-voltage terminal of the secondary is insulated.
  • Either of these electrodes may be connected to the high-voltage high-frequency terminal, the other being earthed.
  • Figures 1 to 4 show a few modified forms of the invention.
  • discharge electrode 31 is fitted in a small quartz tube 32; this quartz tube is embedded in the lower portion or inner end 33 of an exponential horn, also of quartz or like material, so as to form a chamber 35 in which a sufiicient vacuum is created.
  • this chamber may also remain filled with air, the heat developed during the operation of the apparatus being such that the air pressure in chamber 35 ;;becomes sufiicient to constitute an efiicient insulating kmedium.
  • This assembly is surrounded by an earthed electrode 36, which may be of aluminum and form a casing having a sealed bottom consisting of an insulating plate 37, for instance of steatite or like refractory insulating material.
  • the platinum point 31 is connected to the secondary 38 of a high-frequency transformer the primary 39 of which has one end 40 connected to the central portion 41 of a coaxial conductor and the other end 43 connected to the peripheral electrically-conductive portion 44 of this coaxial conductor 42 connected to a source of modulated high frequency at a low potential (not shown), this peripheral portion 44 being earthed as shown.
  • a switch 45 will be inserted before the coaxial conductor so that the complete assembly consisting of the emitter proper with its high-frequency high-voltage transformer can be isolated at will.
  • the high-voltage highfrequency current is fed to discharge electrode 31 and the other electrode 36 is earthed, 'so that a corona discharge is provided at electrode 31L
  • the same elements as in the arrangement of Fig. 1 are used, the only difference residing in that the windings 38 and 39 of the high-frequency high-voltage transformer are disposed coaxially around the platinum point 31 and that the other earthed electrode 36 is constituted by the rear portion of the secondary 39 which is earthed in this case.
  • the primary and secondary windings are still mounted coaxially to the discharge electrode 31 but the latter is earthed directly, whilst it is the high-voltage high-frequency portion of the secondary which constitutes the second electrode and surrounds more closely discharge electrode 31; voltage terminal 46 of the secondary is insulated.
  • the potential difference between the two electrodes is the same as in the preceding forms of embodiment described hereinabove since the discharge electrode is earthed it can be heated much more easily and economically than a point fed with high-voltage current.
  • the arrangement is substantially similar to that of Fig. 1, except in that the quartz member 47, cemented or otherwise sealed to the rear portion of discharge electrode 31 at 37, carries the windings 38, 39 and constitutes an integral self-contained assembly adapted to be electrically connected through a plugor like connector (not shown) to the coaxial conductor 42; small quartz tubes or sockets 48, 49, 50 receiving the ends of the various winding wires facilitate the electrical connections.
  • a complete self-contained transducer unit and high frequency transmission line said transducer unit comprising a horn having an electrically insulating portion defining the origin thereof, a discharge electrode having an exposed tip within the insulating portion and located at and obturating the horn origin, another electrode insulated from said discharge electrode located in a forward position with respect to said first electrode, a high frequency high voltage transformer comprising a primary and a secondary winding, connections between said transmission line and primary for exciting the same with low voltage high frequency oscillations modulated the highby the waves to be transduced and means for impressing the high frequency secondary potentials on said two electrodes to create a corona discharge at said discharge electrode.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Oxygen, Ozone, And Oxides In General (AREA)
  • Elimination Of Static Electricity (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
US350594A 1951-05-12 1953-04-23 Transducer Expired - Lifetime US2847516A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1041790T 1951-05-12
FR757358X 1952-12-29

Publications (1)

Publication Number Publication Date
US2847516A true US2847516A (en) 1958-08-12

Family

ID=31947998

Family Applications (1)

Application Number Title Priority Date Filing Date
US350594A Expired - Lifetime US2847516A (en) 1951-05-12 1953-04-23 Transducer

Country Status (4)

Country Link
US (1) US2847516A (US06623731-20030923-C00012.png)
BE (1) BE519086A (US06623731-20030923-C00012.png)
FR (6) FR1041790A (US06623731-20030923-C00012.png)
GB (2) GB757358A (US06623731-20030923-C00012.png)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2191368B1 (US06623731-20030923-C00012.png) * 1972-06-27 1975-03-07 Commissariat Energie Atomique
FR2454244A1 (fr) * 1979-04-13 1980-11-07 Klein Siegfried Transducteur omnidirectionnel pour la transformation de modulations electriques en modulations vibratoires
FR2454251B1 (fr) * 1979-04-13 1987-06-12 Klein Siegfried Circuit blinde depourvu de fuites d'ondes electromagnetiques perturbatrices
FR2506551A1 (fr) * 1981-05-21 1982-11-26 Bondar Henri Procede et dispositif pour transformer une tension electrique periodique bf en ondes acoustiques ou inversement
FR2559636A1 (fr) * 1984-02-15 1985-08-16 Valois Distribution Transducteur electro-acoustique a emission d'ions
DE4209334C2 (de) * 1992-03-23 2000-10-26 Leybold Ag Hochvakuum-Beschichtungsanlage
DE102010026112A1 (de) * 2010-07-05 2012-01-05 Alexander Braun Plasmahochtöner

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1685075A (en) * 1927-08-17 1928-09-18 Rca Corp Intertransposition of sound and electrical energy
US1702951A (en) * 1927-07-13 1929-02-19 Ruben Samuel Sound-emitting apparatus
US1751888A (en) * 1929-04-29 1930-03-25 Ruben Patents Company Sound-emitting device
US1758993A (en) * 1928-11-17 1930-05-20 Rca Corp Sound reproducer

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1702951A (en) * 1927-07-13 1929-02-19 Ruben Samuel Sound-emitting apparatus
US1685075A (en) * 1927-08-17 1928-09-18 Rca Corp Intertransposition of sound and electrical energy
US1758993A (en) * 1928-11-17 1930-05-20 Rca Corp Sound reproducer
US1751888A (en) * 1929-04-29 1930-03-25 Ruben Patents Company Sound-emitting device

Also Published As

Publication number Publication date
GB757111A (en) 1956-09-12
FR67664E (fr) 1958-03-17
FR62292E (fr) 1955-06-13
FR65386E (fr) 1956-02-09
FR64924E (fr) 1955-12-14
GB757358A (en) 1956-09-19
FR62738E (fr) 1955-06-20
FR1041790A (fr) 1953-10-27
BE519086A (US06623731-20030923-C00012.png)

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