FR946994A - Device generating oscillations modulated in frequency or phase by acoustic vibrations - Google Patents

Device generating oscillations modulated in frequency or phase by acoustic vibrations

Info

Publication number: FR946994A
Authority: FR; France
Prior art keywords: frequency; phase; device generating; acoustic vibrations; generating oscillations
Prior art date: 1946-05-23
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

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.)

Koninklijke Philips NV

Original Assignee

Philips Gloeilampenfabrieken NV

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.)

1946-05-23

Filing date

1947-05-21

Publication date

1949-06-20

1947-05-21Application filed by Philips Gloeilampenfabrieken NVfiledCriticalPhilips Gloeilampenfabrieken NV

1949-06-20Application grantedgrantedCritical

1949-06-20Publication of FR946994ApublicationCriticalpatent/FR946994A/en

StatusExpiredlegal-statusCriticalCurrent

Classifications

- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03C—MODULATION
- H03C3/00—Angle modulation
- H03C3/10—Angle modulation by means of variable impedance
- H03C3/28—Angle modulation by means of variable impedance using variable impedance driven mechanically or acoustically
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H2/00—Networks using elements or techniques not provided for in groups H03H3/00 - H03H21/00
- H03H2/005—Coupling circuits between transmission lines or antennas and transmitters, receivers or amplifiers
- H03H2/006—Transmitter or amplifier output circuits
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R19/00—Electrostatic transducers

Landscapes

Physics & Mathematics (AREA)
Engineering & Computer Science (AREA)
Acoustics & Sound (AREA)
Signal Processing (AREA)
Oscillators With Electromechanical Resonators (AREA)
Electrophonic Musical Instruments (AREA)
Soundproofing, Sound Blocking, And Sound Damping (AREA)

FR946994D1946-05-231947-05-21 Device generating oscillations modulated in frequency or phase by acoustic vibrationsExpiredFR946994A (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
NL628057X		1946-05-23

Publications (1)

Publication Number	Publication Date
FR946994Atrue FR946994A (en)	1949-06-20

Family

ID=19788647

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
FR946994DExpiredFR946994A (en)	1946-05-23	1947-05-21	Device generating oscillations modulated in frequency or phase by acoustic vibrations

Country Status (5)

Country	Link
US (1)	US2497605A (en)
DE (1)	DE809565C (en)
FR (1)	FR946994A (en)
GB (1)	GB628057A (en)
NL (1)	NL67619C (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US2917300A (en)*	1956-12-07	1959-12-15	Univ California	Frequency modulating accelerometer
DE1261901B (en)*	1963-03-29	1968-02-29	Telefunken Patent	Four-pole made up of resistors and capacitors with a maximum attenuation

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US1615645A (en)*	1920-07-15	1927-01-25	Westinghouse Electric & Mfg Co	Combined wireless sending and receiving system
GB406674A (en)*	1931-09-19	1934-02-28	Marconi Wireless Telegraph Co	Improvements in or relating to modulated carrier wave transmitting systems
GB512028A (en)*	1938-02-24	1939-08-28	William Spencer Percival	Improvements in or relating to thermionic valve circuits
US2418842A (en)*	1943-03-04	1947-04-15	Bell Telephone Labor Inc	Scanning oscillator

0
- NLNL67619Dpatent/NL67619C/xxactive
1947
- 1947-05-13USUS747778Apatent/US2497605A/ennot_activeExpired - Lifetime
- 1947-05-20GBGB13533/47Apatent/GB628057A/ennot_activeExpired
- 1947-05-21FRFR946994Dpatent/FR946994A/ennot_activeExpired
1948
- 1948-11-04DEDEP20518Apatent/DE809565C/ennot_activeExpired

Also Published As

Publication number	Publication date
US2497605A (en)	1950-02-14
GB628057A (en)	1949-08-22
DE809565C (en)	1951-07-30
NL67619C (en)

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