GB1030490A - Electromechanical transducer - Google Patents

Electromechanical transducer

Info

Publication number
GB1030490A
GB1030490A GB4331264A GB4331264A GB1030490A GB 1030490 A GB1030490 A GB 1030490A GB 4331264 A GB4331264 A GB 4331264A GB 4331264 A GB4331264 A GB 4331264A GB 1030490 A GB1030490 A GB 1030490A
Authority
GB
United Kingdom
Prior art keywords
junction
pressure
transistor
base
probe
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
GB4331264A
Inventor
Anthony John Jewell
Keith Elidyr Preece
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB4331264A priority Critical patent/GB1030490A/en
Priority to NL6412863A priority patent/NL6412863A/xx
Priority to DE19641437470 priority patent/DE1437470A1/en
Priority to FR994791A priority patent/FR1413760A/en
Priority to BE655949D priority patent/BE655949A/xx
Priority to FR16506A priority patent/FR1443291A/en
Priority to FR35888A priority patent/FR88946E/en
Priority to NL6513797A priority patent/NL6513797A/xx
Priority to DE19651515902 priority patent/DE1515902B2/en
Priority to NL6514685A priority patent/NL6514685A/xx
Priority to BE672213D priority patent/BE672213A/xx
Priority to FR38112A priority patent/FR89473E/en
Priority to FR54986A priority patent/FR89743E/en
Publication of GB1030490A publication Critical patent/GB1030490A/en
Expired legal-status Critical Current

Links

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
    • H04R23/006—Transducers other than those covered by groups H04R9/00 - H04R21/00 using solid state devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G2201/00—Indexing codes relating to handling devices, e.g. conveyors, characterised by the type of product or load being conveyed or handled
    • B65G2201/06—Articles and bulk

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Transducers For Ultrasonic Waves (AREA)

Abstract

1,030,490. Frequency and amplitude modulation systems; microphones. STANDARD TELEPHONES & CABLES Ltd. Oct. 23, 1964, No. 43312/64. Headings H3R and H4J. Acoustic or other pressure mechanically applied to a semi-conductor junction of a transistor or tunnel diode forming part of an oscillator, frequency modulates it or mainly amplitude modulates it if applied at a transistor - emitter - base junction. A limited area of a P.N. junction, where it emerges at the surface of a semiconductor, may be pressed upon by the tip of a probe. The probe 4 may be mounted on a pivoted arm 6 with a screw 9 applying initial static pressure to the probe and P.N. junction, and with an acoustic diaphragm 5 connected to the probe to vary the pressure on a transistor collector/base or emitter/base junction, or the forwardly-biased junction of a tunnel diode. With a resonant circuit connected to the transistor or diode the oscillator of a low-power transmitter may be formed. Emitter/base pressure varies the transistor gain and amplitude modulates the oscillator. But collector/ base or diode junction pressure mainly varies internal capacity and frequency modulates it. The limited area subject to pressure may be insulated by an oxide coating.
GB4331264A 1963-11-19 1964-10-23 Electromechanical transducer Expired GB1030490A (en)

Priority Applications (13)

Application Number Priority Date Filing Date Title
GB4331264A GB1030490A (en) 1964-10-23 1964-10-23 Electromechanical transducer
NL6412863A NL6412863A (en) 1963-11-19 1964-11-04
DE19641437470 DE1437470A1 (en) 1963-11-19 1964-11-07 Pressure transducer
FR994791A FR1413760A (en) 1963-11-19 1964-11-13 Electromechanical transducers
BE655949D BE655949A (en) 1963-11-19 1964-11-19
FR16506A FR1443291A (en) 1963-11-19 1965-05-10 Container edges for conveyor belts
FR35888A FR88946E (en) 1963-11-19 1965-10-22 Electromechanical transducers
NL6513797A NL6513797A (en) 1963-11-19 1965-10-25
DE19651515902 DE1515902B2 (en) 1963-11-19 1965-11-10 Piezoelectric pressure transducer
NL6514685A NL6514685A (en) 1963-11-19 1965-11-12
BE672213D BE672213A (en) 1963-11-19 1965-11-12
FR38112A FR89473E (en) 1963-11-19 1965-11-12 Electromechanical transducers
FR54986A FR89743E (en) 1963-11-19 1966-03-25 Container edges for conveyor belts

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4331264A GB1030490A (en) 1964-10-23 1964-10-23 Electromechanical transducer

Publications (1)

Publication Number Publication Date
GB1030490A true GB1030490A (en) 1966-05-25

Family

ID=10428215

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4331264A Expired GB1030490A (en) 1963-11-19 1964-10-23 Electromechanical transducer

Country Status (1)

Country Link
GB (1) GB1030490A (en)

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