GB1069758A - Sound amplification using foamed thermoplastics - Google Patents

Sound amplification using foamed thermoplastics

Info

Publication number
GB1069758A
GB1069758A GB3157564A GB3157564A GB1069758A GB 1069758 A GB1069758 A GB 1069758A GB 3157564 A GB3157564 A GB 3157564A GB 3157564 A GB3157564 A GB 3157564A GB 1069758 A GB1069758 A GB 1069758A
Authority
GB
United Kingdom
Prior art keywords
loud
cone
speaker
foamed
foamed material
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
GB3157564A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB1069758A publication Critical patent/GB1069758A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10C—PIANOS, HARPSICHORDS, SPINETS OR SIMILAR STRINGED MUSICAL INSTRUMENTS WITH ONE OR MORE KEYBOARDS
    • G10C3/00—Details or accessories
    • G10C3/06—Resonating means, e.g. soundboards or resonant strings; Fastenings thereof
    • 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
    • H04R1/021—Casings; Cabinets ; Supports therefor; Mountings therein incorporating only one transducer
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)

Abstract

1,069,758. Loud-speakers. F. B. SMOLARCZYK. Aug. 4, 1964 [Sept. 18, 1963], No. 31575/64. Headings H4J and H4X. Acoustic vibrations are said to be amplified by, and a static charge produced on the surface of, a foamed thermo-plastic material mounted in contact with the cone of a loud-speaker, the cone having a depth to diameter ratio less than or equal to 0À138. The loud-speaker may be mounted with the edge of the cone in contact with the foamed material, Figs. 3, 4 (not shown), and Fig. 6. The centre of the cone may be connected to the foamed material, Figs. 1 and 2 (not shown); or the cone may be coated with foamed material, Fig. 5 (not shown). In the embodiment of Fig. 6 parts 7 and 18 are of foamed polystyrene while 17 is a sheet of acrylonitrile-styrene copolymer. An electric charge is built up when the loud-speaker is fed with a signal and this causes dust particles to accumulate on sheet 17 so allowing the loud-speaker to be used as a dusting device.
GB3157564A 1963-09-18 1964-08-04 Sound amplification using foamed thermoplastics Expired GB1069758A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA884769 1963-09-18

Publications (1)

Publication Number Publication Date
GB1069758A true GB1069758A (en) 1967-05-24

Family

ID=4141815

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3157564A Expired GB1069758A (en) 1963-09-18 1964-08-04 Sound amplification using foamed thermoplastics

Country Status (2)

Country Link
GB (1) GB1069758A (en)
NL (1) NL6410941A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2226214A (en) * 1988-11-07 1990-06-20 Veses Javier Gadea Loudspeaker enclosure

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2727819B1 (en) * 1994-12-02 1998-04-30 Charlet Francois VENT DEVICE FOR SOUND TRANSMITTER

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2226214A (en) * 1988-11-07 1990-06-20 Veses Javier Gadea Loudspeaker enclosure

Also Published As

Publication number Publication date
NL6410941A (en) 1965-03-19

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