US2429104A - Signal translating apparatus - Google Patents

Signal translating apparatus Download PDF

Info

Publication number
US2429104A
US2429104A US43078843A US2429104A US 2429104 A US2429104 A US 2429104A US 43078843 A US43078843 A US 43078843A US 2429104 A US2429104 A US 2429104A
Authority
US
Grant status
Grant
Patent type
Prior art keywords
diaphragm
loud speaker
chamber
fluid
opening
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
Inventor
Harry F Olson
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.)
RCA Corp
Original Assignee
RCA Corp
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
Grant date

Links

Images

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S1/00Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
    • G01S1/72Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using ultrasonic, sonic or infrasonic waves

Description

Oct. 14, 1947. H, F, OLSON 2,429,104

SIGNAL TRANSLATING APARATus Fiied uarcn 27, 1945 Inventor Hary f.' Olson f CEM Gttorneg .1' fumrso ysur quencies.

Patented Oct. 14, 1947 SIGNAL 'raANsLArrNG ArrAnA'rUs' Harry F. Olson, Prlncetom-N. J., assignor to Radio Corporation of Delaware This invention relates to signal translating api paratus,V andI more particularly to a loud speaker whichA ls especially useful in submarine signalling. f

VVarious forms of sub-aqueous loud speakers have been provided heretofore for submarine signalling. For successful operation of a loud speaker submerged in water, it is essential not only that the pressureon both sides of thedia;

phragm be the same, but it is highly desirable` that the stiffness thereof be maintained constant, that'is, that the stiffness of the diaphragm be the same under water as it is in air. So far as I am aware, submarine loud speakers of the prior art have failed in this respect.

The primary object of my present invention is to4 provide an improved sub-aqueous loud speaker wherein the diaphragm will always have the same pressure on each side thereof regardl less of the depth to which the loud speaker is submerged in water or other fluid medium.l

More particularly, it is an object of my present America, a corporation of ppueanon- March 27, 1943, serial No. 430,783 101mm. (ci. 11iassi quencies.` vWhen the loud speaker is immersed in -water or other fluid medium, the medium enters the opening in the rigid casing and causes the aforementioned enclosure to collapse partially, thus forcing the air or other fluid entrapped therein through the previously mentioned passageway intoanother fluid-tight chamber which is closed off by thediaphragm. At the same time, since the diaphragm is exposed to the medium on its front surface, the medium also acts directly on the diaphragm. Since the collapsed enclosure forces the entrapped fluid therein into the chamber which backs up the back side of the diaphragm, the same, steady pressure is created on both sides of the diaphragm. At the same time, the collapsible enclosure or equalizer presents a high alternating impedance to the medium because of the fact that the rigid enclosure surinvention to provide a pressure compensator for Vsub-aqueous loud speakers by means of which the same fluid pressure willbe maintained on both provide an improved sub-aqueous loud speaker which will transmit acoustical vibrations with great efficiency.

' sides of the loud speaker diaphragm, while at the Y Still another object of my present invention is to provide an improved sub-aqueous loud speaker the characteristics of which are independent of the depth to which the loud speaker may be immersed in water.

A further object of my present invention is to provide an improved sub-aqueous loud speaker as aforesaidin which the stiffness of the vibratingsystem is maintained at a relatively low value. It is also an object of my present invention to provide an improved sub-aqueous loud speaker as set forth above which is simple in construction, inexpensive in cost, and highly eilicient in use.

In accordance with my present invention, I provide a collapsible enclosure which I couple to the back side of the loud speaker diaphragm through a passageway which offers a high impedance to the passage of fluid at acoustic fre- Around the collapsible enclosure, I provide a rigid enclosure having an opening therein which also affords a high impedance to the passage of fluid therethrough at acoustic frerounds it, and it is coupled to the medium exterior of the rigid casing only through the small aperture or opening in the casing.

The novel features that I consider characteristie of my invention lare set forth with particularity in the appended claim. The invention itself, however, both as to its organization and method of operation, as well as additional objects and advantages thereof, will best be'understood from the following description of one embodiment thereof, when read in connection with the accompanying drawing in which the single figure is a central, sectional View of one embodiment of this invention.

Referring more particularly to the drawing, there is shown a loud speaker comprising a cylindrical magnet l, a back plate 3, a yokeplate 5 and a center pole piece 1 all connected together in fluid-tight relation. The yoke plate 5 is provided With a central opening of larger diameter than that of the pole piece 'l whereby to form an air gap 9 in well known manner. Connected to the yoke plate 5 in fluid-tight relation thereto is a vibratory diaphragm Il provided with a voice coil i3 located in the air gap 9. The magnet I, the back plate 3, and the yoke plate 5 may be coated on the exposed surfaces with a corrosion resistant coating i5, the diaphragm Il being also made of a corrosion resistant material. The structure thus far described provides a fluid-tight chamber I1 within the eld structure constituted by the magnet l and the plates 3 and 5, the air gap 9 affording communication between the chamber I1 and the exterior of the field structure, and the diaphragm I I closing off the chamber l1 from the exterior of the loud speaker.

'I'he back plate 3 is provided with an opening I9 and with a concentrically arranged flange 2| over which is tted a collapsible enclosure 23 of yieldable material, such as relatively soft rubber. The member 23 is relatively less stii than the diaphragm I I and encloses a second chamber 25 which is in communication with the chamber I'I only through the opening I9. The enclosure 23 has fluid-tight connection with the back plate 3, and for this purpose, it may be provided with an outwardly extending iiange 23a which rests against the back plate 3 and which is held tightly thereagainst and against the flange 2| by a ring 2l.

Surrounding the collapsible member 23 preferably, but not necessarily, concentric therewith and in spaced relation thereto, Vwhereby to provide a third chamber 3 I, is a rigid casing 29 which has fluid-tight connection with the ring 21 and the flange 23a. The casing 29 has a small aperture or opening 33 therein which aords communication between the chamber 3| and the exterior of the casing. The opening 33 is of such dimensions that it aifords a high impedance tothe passage of a fluid between the chamber 3| and the exterior of the casing 29 at acoustic frequencies. Y

A loud speaker constructed'as above described will normally have air entrapped within the chambers I'l, 25 and 3 I. When such a loud speaker is immersed in another iluid medium, such as water, the water pressure against the front surface of the diaphragm II would tend to displace the diaphragm from its normal position. However, the water is free to enter the chamber 3| through the opening 33 and to partially collapse the member 23 (for example, to the dot and dash line position shown in the drawing). Thus, some of the air in the chamber 25 is forced into the chamber I1 through the opening I9 until the pressure on the back side of the diaphragm E|| is equal to the water pressure on the front side thereof. Accordingly, the diaphragm |I remains in its normal position and its stiffness is not altered. Consequently, the diaphragm remains free to reproduce faithfully in the form of acoustic vibrations the electrical signal impulses supplied to the voice coil 9 through suitable means (not shown) The high impedance which the passageway I9 offers to vibrations at acoustic frequencies will prevent a transfer of entrapped air between the chambers I1 and 25 during operation of the loud speaker. Also, since the aperture 33 offers a high impedance to the passage of the water therethrough at acoustic frequencies such as are set up therein by the diaphragm II, the collapsed member 23 will remain in the dot and dash line, collapsed condition. 5 From the foregoing description, it will be apparent to those skilled inthe art that I have provided an improved loud speaker having al1 the advantages heretofore enumerated. Although I have shown and described but one embodiment of my invention, it will, -no doubt, be apparent to those skilled in the art that many other modifications thereof are possible. I therefore desire that my invention shall not be limited except insofar as is made necessary by the prior art and by the spirit of the appended claim.

I claim as my invention:

In signal translating apparatus, the combination of a magnetic field structure forming a first chamber and including an air gap affording communication between said first chamberv and the exterior of said field structure, a vibratory member including a voice coil disposed in said air gap. said member having fluid-tight connection with said structure and closing said air gap 01T from the exterior of said apparatus, said field structure including an opening in one wall thereof communicating with said first chamber, a collapsible member having uid-tight connection with said wall and forming a. second chamberfin communication with said opening, and a rigid casing surrounding said collapsible member in.

spaced relation thereto providing a thirdchamber around saidmember, said casing having an opening therein affording communication between said third chamber and the exterior of said apparatus.

HaRRY F. OLSON. REFERENCES CITED file of this patent:

UNITED STATES PATENTS Name Date Dearlove Aug. 11, 1908 Number Country Date France Aug. 24, 1909 Great Britain July 8, 1913 Number The following references are of record inthel Wood June 13, 1922

US2429104A 1943-03-27 1943-03-27 Signal translating apparatus Expired - Lifetime US2429104A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US2429104A US2429104A (en) 1943-03-27 1943-03-27 Signal translating apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US2429104A US2429104A (en) 1943-03-27 1943-03-27 Signal translating apparatus

Publications (1)

Publication Number Publication Date
US2429104A true US2429104A (en) 1947-10-14

Family

ID=23709032

Family Applications (1)

Application Number Title Priority Date Filing Date
US2429104A Expired - Lifetime US2429104A (en) 1943-03-27 1943-03-27 Signal translating apparatus

Country Status (1)

Country Link
US (1) US2429104A (en)

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2645768A (en) * 1949-08-24 1953-07-14 Santino Louis Sound generating device
US2714134A (en) * 1951-02-27 1955-07-26 Martin L Touger Headset receiver
US2769038A (en) * 1952-11-29 1956-10-30 Orton Melvern Phonograph pickup and the like
US2903673A (en) * 1954-01-06 1959-09-08 Harris Transducer Corp Acoustical impedance-matching transducer
US2915738A (en) * 1957-01-22 1959-12-01 Shell Dev Hydrophone detector
US2937244A (en) * 1957-10-04 1960-05-17 Jetronic Ind Inc Electrical-acoustic transducer
US2961639A (en) * 1947-05-08 1960-11-22 John V Atanasoff Underwater transducer
US2964730A (en) * 1955-02-25 1960-12-13 Schlumberger Well Surv Corp Electro-acoustic transducer having coaxially spaced cylindrical coils
US2977573A (en) * 1952-12-30 1961-03-28 Bell Telephone Labor Inc Pressure compensated underwater transducer
US2978672A (en) * 1951-04-25 1961-04-04 Bell Telephone Labor Inc Hydrophone
US2978671A (en) * 1951-08-11 1961-04-04 Harris Transducer Corp Electrodynamic transducer
US3000215A (en) * 1951-09-27 1961-09-19 John V Atanasoff Microbarophone
US3027541A (en) * 1951-08-11 1962-03-27 Harris Transducer Corp Structure for use in an electrodynamic transducer
US3108247A (en) * 1956-07-23 1963-10-22 Harris Transducer Corp Depth-compensated transducer
US3241099A (en) * 1961-12-01 1966-03-15 Honeywell Inc Pressure compensated transducer
US3345607A (en) * 1965-09-24 1967-10-03 Westinghouse Electric Corp Underwater transducer
US3359535A (en) * 1966-01-06 1967-12-19 Herbert J Webb Underwater communicator
US3541502A (en) * 1969-01-03 1970-11-17 Us Navy Deep submergence transducer
US3760346A (en) * 1972-05-08 1973-09-18 Us Navy High-power underwater electroacoustic transducer for the infrasonic and low audio-frequency range
US3786407A (en) * 1971-04-14 1974-01-15 Kawasaki Heavy Ind Ltd Acoustic transducer for deep sea
US3932835A (en) * 1974-09-25 1976-01-13 The United States Of America As Represented By The Secretary Of The Navy Towable VLF sonar projector
US4391299A (en) * 1980-04-21 1983-07-05 The United States Of America As Represented By The Secretary Of The Army Electro fluidic actuator
US20090265962A1 (en) * 2008-04-29 2009-10-29 Caterpillar Inc. Avoidance system for locating electric cables
US20160047923A1 (en) * 2014-08-14 2016-02-18 Pgs Geophysical As Compliance Chambers for Marine Vibrators

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US895978A (en) * 1905-01-30 1908-08-11 Joseph Arthur Lovel Dearlove Apparatus for transmitting and reproducing sounds.
FR401264A (en) * 1908-07-15 1909-08-24 Henri Abraham Improvements to submarine signals
GB191315780A (en) * 1913-07-08 1914-07-02 Richard Klinger Apparatus for the Transmission of Audible Signals.
US1419596A (en) * 1918-04-25 1922-06-13 Submarine Signal Co Microphone mounting
US2069242A (en) * 1933-01-19 1937-02-02 George A Graham Electroacoustic energy converting system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US895978A (en) * 1905-01-30 1908-08-11 Joseph Arthur Lovel Dearlove Apparatus for transmitting and reproducing sounds.
FR401264A (en) * 1908-07-15 1909-08-24 Henri Abraham Improvements to submarine signals
GB191315780A (en) * 1913-07-08 1914-07-02 Richard Klinger Apparatus for the Transmission of Audible Signals.
US1419596A (en) * 1918-04-25 1922-06-13 Submarine Signal Co Microphone mounting
US2069242A (en) * 1933-01-19 1937-02-02 George A Graham Electroacoustic energy converting system

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2961639A (en) * 1947-05-08 1960-11-22 John V Atanasoff Underwater transducer
US2645768A (en) * 1949-08-24 1953-07-14 Santino Louis Sound generating device
US2714134A (en) * 1951-02-27 1955-07-26 Martin L Touger Headset receiver
US2978672A (en) * 1951-04-25 1961-04-04 Bell Telephone Labor Inc Hydrophone
US2978671A (en) * 1951-08-11 1961-04-04 Harris Transducer Corp Electrodynamic transducer
US3027541A (en) * 1951-08-11 1962-03-27 Harris Transducer Corp Structure for use in an electrodynamic transducer
US3000215A (en) * 1951-09-27 1961-09-19 John V Atanasoff Microbarophone
US2769038A (en) * 1952-11-29 1956-10-30 Orton Melvern Phonograph pickup and the like
US2977573A (en) * 1952-12-30 1961-03-28 Bell Telephone Labor Inc Pressure compensated underwater transducer
US2903673A (en) * 1954-01-06 1959-09-08 Harris Transducer Corp Acoustical impedance-matching transducer
US2964730A (en) * 1955-02-25 1960-12-13 Schlumberger Well Surv Corp Electro-acoustic transducer having coaxially spaced cylindrical coils
US3108247A (en) * 1956-07-23 1963-10-22 Harris Transducer Corp Depth-compensated transducer
US2915738A (en) * 1957-01-22 1959-12-01 Shell Dev Hydrophone detector
US2937244A (en) * 1957-10-04 1960-05-17 Jetronic Ind Inc Electrical-acoustic transducer
US3241099A (en) * 1961-12-01 1966-03-15 Honeywell Inc Pressure compensated transducer
US3345607A (en) * 1965-09-24 1967-10-03 Westinghouse Electric Corp Underwater transducer
US3359535A (en) * 1966-01-06 1967-12-19 Herbert J Webb Underwater communicator
US3541502A (en) * 1969-01-03 1970-11-17 Us Navy Deep submergence transducer
US3786407A (en) * 1971-04-14 1974-01-15 Kawasaki Heavy Ind Ltd Acoustic transducer for deep sea
US3760346A (en) * 1972-05-08 1973-09-18 Us Navy High-power underwater electroacoustic transducer for the infrasonic and low audio-frequency range
US3932835A (en) * 1974-09-25 1976-01-13 The United States Of America As Represented By The Secretary Of The Navy Towable VLF sonar projector
US4391299A (en) * 1980-04-21 1983-07-05 The United States Of America As Represented By The Secretary Of The Army Electro fluidic actuator
US20090265962A1 (en) * 2008-04-29 2009-10-29 Caterpillar Inc. Avoidance system for locating electric cables
US20160047923A1 (en) * 2014-08-14 2016-02-18 Pgs Geophysical As Compliance Chambers for Marine Vibrators
US9612347B2 (en) * 2014-08-14 2017-04-04 Pgs Geophysical As Compliance chambers for marine vibrators

Similar Documents

Publication Publication Date Title
US3636281A (en) Loudspeaker using wall as diaphragm
US3320579A (en) Compliant variable reluctance electroacoustic transducer
US2228886A (en) Electroacoustical apparatus
US2440903A (en) Underwater transducer
US4157741A (en) Phase plug
US4101736A (en) Device for increasing the compliance of a speaker enclosure
US2295483A (en) Loudspeaker
US4472605A (en) Electrodynamic loudspeaker for low and medium sound frequencies
US4618025A (en) Acoustical ducting for speakers and enclosures
US2429470A (en) Loud-speaker with pressure-equalized chamber system enclosing flux gap
US2138036A (en) Compressional wave sender or receiver
US2972018A (en) Noise reduction system
US3816672A (en) Sound reproduction system
US1988250A (en) Loud speaker and method of propagating sound
US2775309A (en) Sound translating devices
US2862069A (en) Dynamic transducer
US3849679A (en) Electroacoustic transducer with controlled beam pattern
US2058208A (en) Acoustic device
US3456755A (en) Hydraulic loudspeakers
US2567407A (en) Electroacoustic transducer
US2539672A (en) Coaxial dual-unit electrodynamic loud-speaker
US3308423A (en) Electroacoustic transducer
US1907723A (en) Sound reproducing device
US4152552A (en) Horn speaker and method for producing low distortion sound
US2490595A (en) Hydrophone