US3306990A - Microphone and speaker structure for miniature receiver and transmitter - Google Patents

Microphone and speaker structure for miniature receiver and transmitter Download PDF

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Publication number
US3306990A
US3306990A US337348A US33734864A US3306990A US 3306990 A US3306990 A US 3306990A US 337348 A US337348 A US 337348A US 33734864 A US33734864 A US 33734864A US 3306990 A US3306990 A US 3306990A
Authority
US
United States
Prior art keywords
microphone
speaker
transmitter
wall
housing
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
US337348A
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English (en)
Inventor
Robert H Walker
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.)
Motorola Solutions Inc
Original Assignee
Motorola Inc
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 Motorola Inc filed Critical Motorola Inc
Priority claimed from US337347A external-priority patent/US3345568A/en
Priority to US337348A priority Critical patent/US3306990A/en
Priority to GB53010/64A priority patent/GB1045320A/en
Priority to BE657879D priority patent/BE657879A/xx
Priority to LU47715A priority patent/LU47715A1/xx
Priority to FR817A priority patent/FR1419470A/fr
Priority to NL656500282A priority patent/NL148760B/xx
Priority to DEM50472U priority patent/DE1933666U/de
Publication of US3306990A publication Critical patent/US3306990A/en
Application granted granted Critical
Anticipated expiration legal-status Critical
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
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
    • H04R1/023—Screens for loudspeakers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/3827—Portable transceivers
    • H04B1/3833—Hand-held transceivers

Definitions

  • Miniaturized electronic apparatus has come into prominent usage in recent years, particularly in transistorized radio devices of the type of'carrying on the person and operated from a self-contained battery power source.
  • the use of transistors makes it possible to provide a compact light weight transmitter and receiver powered by batteries, because of the small size and reduced operating power requirements of the transistor.
  • the microphone and speaker In a miniaturized hand held transmitter and receiver, the microphone and speaker must be separated from each other acoustically and electrically and must also be mounted on the unit so that they are easily used by the operator. Because of the small size of a hand held transmitter and receiver, the space available for mounting the speaker and microphone is limited. It is also desirable, in order that the unit may be easily used, that the speaker and microphone receive and transmit sound from the same location on the housing.
  • Another object is to provide a microphone and a speaker so positioned in a housing that the sound transmitted -by the speaker and received by the microphone enters and leaves the housing by the same opening therein.
  • a feature of this invention is the provision of a miniature hand held transistorized transmitter and receiver with a microphone located concentrically with respect to the speaker and positioned between the cone of the speaker and the housing of the transmitter and receiver unit, with the microphone being magnetically and acoustically shielded from the speaker.
  • Another feature of the invention is the provision of a miniature hand held transmitter and receiver in which the speaker and microphone are sealed to prevent moisture from entering the transmitter and receiver housing through the opening of the speaker and the microphone.
  • FIG. 1 is a perspective view of a miniature hand held battery powered transmitter and receiver
  • FIG. 2 is a cross-sectional view of the transmitter and receiver shown in FIG. 1;
  • FIG. 3 is another view showing the mounting of the speaker and microphone.
  • FIG. 4 is an enlarged cross sectional view illustrating the mounting of the speaker and microphone in the mini-ature transmitter and receiver shown in FIG. 1.
  • a miniaturized battery powered radio transmitting and receiving device which includes a plastic housing containing the electric circuit components mounted on printed wiring boards.
  • a speaker and microphone are concentrically mounted so that the operator can receive and transmit through one opening in the case.
  • the microphone is mounted between the cone of the speaker and the housing.
  • a metal covering is provided to secure the microphone within the housing, and to shield the microphone from the speaker magnet. Seals are provided to prevent the entrance of moisture into the housing.
  • FIG. 1 is a perspective view of a miniature hand held transistorized transmitter and receiver 20, contained in a plastic housing 21. Located on one end of housing 21, are the volume and on-oif control 25, squelch control 26, frequency selection switch 27, and a telescopic antenna 24. A push-to-talk switch 23 is located on one side of housing 21. A grill 22 is provided behind which are located the speaker and the microphone.
  • FIG. 2 is a cross-sectional view of a miniature transmitter and receiver of FIG. 1 showing the location of the components inside the unit.
  • Battery 34 is located in the battery compartment 42 at the bottom of the unit.
  • the board 29 and transmitter printed wiring board 30 are held in position in plastic housing 21 between cover 31 and ledges 35.
  • Speaker 33 is mounted to grill 22.
  • FIG. 3 An enlarged view of the speaker and microphone mounting structure is shown in FIG. 3, and a cross-sectional view of FIG. 3 is shown in FIG. 4.
  • Molded into grill 22 is an annular ridge 36 for speaker 33 and a rectangular ridge 28 for microphone 43. Rectangular ridge 28 for microphone 43 is concentrically located with respect to annular ridge 36 between speaker cone 40 and grill 22.
  • Microphone 43 is surrounded by resilient material 45 and 47 which isolates the same acoustically from grill 22 and rectangular ridge 28.
  • Microphone 43 includes a magnetic structure and a coil which generates electrical signals in response to sound waves, and the signals are coupled to transmitter wiring board 30 by wire cable 56.
  • a metal cover 46 is held in place by screws 51 inserted into rectangular ridge 28.
  • Screws 51 force cover 46 against resilient material 45 compressing it to secure microphone 43 within rectangular ridge 28.
  • Gaskets 50 and 52 are provided to seal the rectangular ridge 28 and cover 46 to prevent the entrance of moisture through grill 22.
  • Metal cover 46 also provides a magnetic shield to prevent interaction between the magnetic structure of microphone 43 and magnet 41 of speaker 33.
  • the edge 37 of speaker 33 is secured within annular ridge 36 by dogs 55 which are forced against the edge 37 by screws 54 inserted in threaded holes 48. As shown in FIG. 3 there are three holes 48 located in annular ridge 36 each of which is used to secure a dog 55 to fasten speaker 33 within annular ridge 3-6. Gasket 38, positioned between grill 22 and edge 37 of speaker 33 acts as a seal to prevent the entrance of moisture around the edges of the speaker.
  • the miniature transmitter and receiver In operating the miniature transmitter and receiver, it is grasped by the lower portion of case 39 and a finger is used to operate push-to-talk switch 23. When receiving, the operator places grill 22 near his car so that any sound from the speaker can be clearly heard. In transmitting, switch 23 is depressed and the operator speaks into grill 22. The sound from the speakers voice is picked up by microphone 43 and coupled to the transmitter portion of the unit.
  • a structure has been shown for mounting a speaker and microphone in a miniature hand held transmitter and receiver so that the sound enters and leaves from the same opening in the transmitter and receiver housing.
  • the speaker and microphone are isolated from each other acoustically and magnetically and the mounting is sealed to prevent the entrance of moisture into the housing.
  • Apparatus for translating sound into electrical signals and for translating electrical signals into sound including in combination, housing means having an apertured wall, a speaker including a cone and a magnet mounted within said housing means with said cone positioned adjacent said wall, a microphone having a magnetic structure mounted on said wall between said speaker cone and said wall, resilient material means spacing one surface of said microphone from said wall and substantially surrounding the remaining surfaces of said microphone, and a cover plate of magnetic material support ing said microphone and fastened to said wall, said cover plate cooperating with said resilient material means and said microphone to mechanically support said microphone, to acoustically insulate said microphone from said speaker and said housing and to shield said magnetlc structure of said microphone from said magnet of said speaker.
  • Apparatus for translating sound into electrical signals and for translating electrical signals into sound including in combination, housing means having a wall containing an opening therein, said Wall having an annular ridge enclosing and opening and a rectangular ridge enclosing a portion of said opening, a speaker including a cone and a magnet mounted within said housing means, the edge of said speaker being located within said annular ridge, means cooperating with said annular ridge :and said edge of said speaker to fasten said speaker to said wall, a microphone mounted partially within said rectangular ridge and between said speaker cone and said housing wall, first gasket means positioned between the edge of said speaker and said annular ridge, said speaker and said microphone being so mounted with respet to said opening that sound generated by said speaker may freely leave said housing means and that sound outside said housing means may freely enter and actuate said micro- 3 phone, one surface of said microphone being spaced apart from said wall by first resilient material means, second resilient material means substantially.
  • said first and second resilient material means acting to acoustically isolate said housing means from said microphone, a cover plate of magnetic material fastened to said rectangular ridge, said cover plate cooperating with said microphone to shield said magnetic structure of said microphone from the magnetic field of said magnet, and further acting to compress said first and second resilient material means against said microphone to secure said microphone mechanically within said rectangular ridge, second gasket means positioned between said cover plate and said rectangular ridge, said first and second gasket means and said, first resilient material means acting to produce a seal for said housing means to prevent moisture from entering the circuit portion of the housing.

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Transmitters (AREA)
  • Casings For Electric Apparatus (AREA)
  • Transceivers (AREA)
  • Telephone Set Structure (AREA)
US337348A 1964-01-13 1964-01-13 Microphone and speaker structure for miniature receiver and transmitter Expired - Lifetime US3306990A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
US337348A US3306990A (en) 1964-01-13 1964-01-13 Microphone and speaker structure for miniature receiver and transmitter
GB53010/64A GB1045320A (en) 1964-01-13 1964-12-31 Portable transmitter-receiver
BE657879D BE657879A (sl) 1964-01-13 1965-01-04
LU47715A LU47715A1 (sl) 1964-01-13 1965-01-04
FR817A FR1419470A (fr) 1964-01-13 1965-01-05 Perfectionnements aux émetteurs-récepteurs radiophoniques portatifs
NL656500282A NL148760B (nl) 1964-01-13 1965-01-11 Draagbaar radioapparaat.
DEM50472U DE1933666U (de) 1964-01-13 1965-01-13 Funksprechgeraet.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US337347A US3345568A (en) 1964-01-13 1964-01-13 Transistorized portable radio transmitter-receiver structure
US337348A US3306990A (en) 1964-01-13 1964-01-13 Microphone and speaker structure for miniature receiver and transmitter

Publications (1)

Publication Number Publication Date
US3306990A true US3306990A (en) 1967-02-28

Family

ID=26990650

Family Applications (1)

Application Number Title Priority Date Filing Date
US337348A Expired - Lifetime US3306990A (en) 1964-01-13 1964-01-13 Microphone and speaker structure for miniature receiver and transmitter

Country Status (7)

Country Link
US (1) US3306990A (sl)
BE (1) BE657879A (sl)
DE (1) DE1933666U (sl)
FR (1) FR1419470A (sl)
GB (1) GB1045320A (sl)
LU (1) LU47715A1 (sl)
NL (1) NL148760B (sl)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50142427U (sl) * 1974-05-13 1975-11-25
US3938618A (en) * 1975-03-18 1976-02-17 Motorola, Inc. Speaker grille screen and mounting structure
US4032844A (en) * 1974-12-28 1977-06-28 General Research Of Electronics, Inc. Combination microphone, speaker, and control unit for a radio transceiver
US4504703A (en) * 1981-06-01 1985-03-12 Asulab S.A. Electro-acoustic transducer
US4550429A (en) * 1983-06-03 1985-10-29 Motorola, Inc. Shock absorbing transducer module
US4682363A (en) * 1985-05-23 1987-07-21 Jerry Goldfarb Amphibious personal audio system
FR2748627A1 (fr) * 1996-05-07 1997-11-14 Peugeot Grille de haut-parleur formant cache et vehicule automobile equipe de cette grille
US5721787A (en) * 1997-01-13 1998-02-24 Motorola, Inc. Speaker porting for a communication device
US20070237348A1 (en) * 2006-04-07 2007-10-11 Research In Motion Limited Shielded microphone for mobile communications device
US20160309246A1 (en) * 2014-09-24 2016-10-20 James Thomas O'Keeffe Smart speaker with multifunctional faceplate and local environment sensing
US20200204894A1 (en) * 2018-12-20 2020-06-25 Motorola Solutions, Inc. Systems for reducing wind-induced noise and water infiltration in communication devices
US10755871B2 (en) 2014-09-24 2020-08-25 James Thomas O'Keeffe Smart speaker with interactive speaker grille
US12027338B2 (en) 2022-02-07 2024-07-02 James Thomas O'Keeffe Smart speaker with sensing through the speaker grille

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3763434A (en) * 1972-03-02 1973-10-02 Motorola Inc Battery connecting structure for portable device

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1196562A (en) * 1915-04-09 1916-08-29 Herbert E Lynch Telephone instrument.
US1201060A (en) * 1916-05-18 1916-10-10 Internat Callophone Corp Sound transmitting and reproducing unit.
US1460034A (en) * 1921-08-24 1923-06-26 Telephone Mfg Co Ltd Telephone transmitter
US1772198A (en) * 1921-07-13 1930-08-05 Andersson Ringhald Per Alfred Telephone
US2485405A (en) * 1944-04-21 1949-10-18 Stromberg Carlson Co Dipole microphone
US3132300A (en) * 1960-08-26 1964-05-05 Charbonnages De France Portable transistorized transceiver apparatus

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1196562A (en) * 1915-04-09 1916-08-29 Herbert E Lynch Telephone instrument.
US1201060A (en) * 1916-05-18 1916-10-10 Internat Callophone Corp Sound transmitting and reproducing unit.
US1772198A (en) * 1921-07-13 1930-08-05 Andersson Ringhald Per Alfred Telephone
US1460034A (en) * 1921-08-24 1923-06-26 Telephone Mfg Co Ltd Telephone transmitter
US2485405A (en) * 1944-04-21 1949-10-18 Stromberg Carlson Co Dipole microphone
US3132300A (en) * 1960-08-26 1964-05-05 Charbonnages De France Portable transistorized transceiver apparatus

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50142427U (sl) * 1974-05-13 1975-11-25
JPS5330897Y2 (sl) * 1974-05-13 1978-08-02
US4032844A (en) * 1974-12-28 1977-06-28 General Research Of Electronics, Inc. Combination microphone, speaker, and control unit for a radio transceiver
US3938618A (en) * 1975-03-18 1976-02-17 Motorola, Inc. Speaker grille screen and mounting structure
US4504703A (en) * 1981-06-01 1985-03-12 Asulab S.A. Electro-acoustic transducer
US4550429A (en) * 1983-06-03 1985-10-29 Motorola, Inc. Shock absorbing transducer module
US4682363A (en) * 1985-05-23 1987-07-21 Jerry Goldfarb Amphibious personal audio system
FR2748627A1 (fr) * 1996-05-07 1997-11-14 Peugeot Grille de haut-parleur formant cache et vehicule automobile equipe de cette grille
US5721787A (en) * 1997-01-13 1998-02-24 Motorola, Inc. Speaker porting for a communication device
US8213660B2 (en) * 2006-04-07 2012-07-03 Research In Motion Limited Shielded microphone for mobile communications device
US20070237348A1 (en) * 2006-04-07 2007-10-11 Research In Motion Limited Shielded microphone for mobile communications device
US20120237071A1 (en) * 2006-04-07 2012-09-20 Research In Motion Limited Shielded microphone for mobile communications device
US8750551B2 (en) * 2006-04-07 2014-06-10 Blackberry Limited Shielded microphone for mobile communications device
US10755871B2 (en) 2014-09-24 2020-08-25 James Thomas O'Keeffe Smart speaker with interactive speaker grille
US9807481B2 (en) * 2014-09-24 2017-10-31 James Thomas O'Keeffe Smart speaker with multifunctional faceplate and local environment sensing
US20160309246A1 (en) * 2014-09-24 2016-10-20 James Thomas O'Keeffe Smart speaker with multifunctional faceplate and local environment sensing
US11244795B2 (en) * 2014-09-24 2022-02-08 James Thomas O'Keeffe Smart speaker with interactive speaker grille
US20200204894A1 (en) * 2018-12-20 2020-06-25 Motorola Solutions, Inc. Systems for reducing wind-induced noise and water infiltration in communication devices
US10779067B2 (en) * 2018-12-20 2020-09-15 Motorola Solutions, Inc. Systems for reducing wind-induced noise and water infiltration in communication devices
AU2019403878A8 (en) * 2018-12-20 2021-07-08 Motorola Solutions, Inc. Systems for reducing wind-induced noise and water infiltration in communication devices
CN113228700A (zh) * 2018-12-20 2021-08-06 摩托罗拉解决方案公司 用于减少通信设备中的风致噪声和水渗透的系统
AU2019403878B2 (en) * 2018-12-20 2021-08-12 Motorola Solutions, Inc. Systems for reducing wind-induced noise and water infiltration in communication devices
US12027338B2 (en) 2022-02-07 2024-07-02 James Thomas O'Keeffe Smart speaker with sensing through the speaker grille

Also Published As

Publication number Publication date
BE657879A (sl) 1965-04-30
LU47715A1 (sl) 1965-03-04
GB1045320A (en) 1966-10-12
NL6500282A (sl) 1965-07-14
NL148760B (nl) 1976-02-16
FR1419470A (fr) 1965-11-26
DE1933666U (de) 1966-03-03

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