GB246096A - Improvements in telephones and the like - Google Patents

Improvements in telephones and the like

Info

Publication number
GB246096A
GB246096A GB38524A GB38524A GB246096A GB 246096 A GB246096 A GB 246096A GB 38524 A GB38524 A GB 38524A GB 38524 A GB38524 A GB 38524A GB 246096 A GB246096 A GB 246096A
Authority
GB
United Kingdom
Prior art keywords
diaphragm
flange
coil
secured
rubber
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
GB38524A
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
Priority to GB38524A priority Critical patent/GB246096A/en
Priority to FR588714D priority patent/FR588714A/en
Priority to FR29915D priority patent/FR29915E/en
Publication of GB246096A publication Critical patent/GB246096A/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
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/06—Loudspeakers
    • H04R9/063—Loudspeakers using a plurality of acoustic drivers
    • 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
    • H04R7/12—Non-planar diaphragms or cones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/04—Construction, mounting, or centering of coil
    • H04R9/045—Mounting

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Abstract

246,096. Round, H. J. Jan. 5,1924. Magnetic instruments; loud - speakers; diaphragms. - A rigid annular diaphragm 1 is mounted on rubber or other elastic material 4 which is gripped or secured to rings 5, 6, and is impulsed by means connected to the diaphragm at the mean of its internal and external diameters. The diaphragm may have a cylindrical flange 2 carrying the line coil or may be vibrated by a reed. A body 8, Fig. 4, placed at the base of the horn of a loud speaker leaves an annular space above the diaphragm. The diaphragm 1 may be made of ebonite, cardboard, or aluminium gauze made air-proof with paper, or may be corrugated radially or provided with radial strips stuck to it, and should have a high natural frequency in a radial direction. Fig. 3 shows a paper diaphragm 1 of double V-section with a strengthening ring 11, the line coils 3 being arranged between the poles of an annular magnet M of the type shown in Specification 229,759. The flange 2 may be secured to the diaphragm by a strip of silk cut to form tongues turned alternately to each side of the uncut portion, the tongues being stuck to the diaphragm and the uncut portion to the flange 2. The top of the flange 2 may be connected at intervals to both edges of the diaphragm to increase its rigidity. The weight of the coil 3 should be of the same order as that of the diaphragm. When a large diaphragm is used, the coil 3 is not carried on the diaphragm, but the flange 2 is situated at the base of a conical tube connected at its apex to a reed armature. The material 4 supporting the diaphragm should be stretched to give the system a frequency of about 80. Instead of using rubber, the diaphragm may be supported by helical springs loosely covered with oil silk in order to seal the air gap.
GB38524A 1924-01-05 1924-01-05 Improvements in telephones and the like Expired GB246096A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB38524A GB246096A (en) 1924-01-05 1924-01-05 Improvements in telephones and the like
FR588714D FR588714A (en) 1924-01-05 1924-11-08 Improvements in telephones and similar instruments
FR29915D FR29915E (en) 1924-01-05 1924-12-20 Improvements in telephones and similar instruments

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB38524A GB246096A (en) 1924-01-05 1924-01-05 Improvements in telephones and the like

Publications (1)

Publication Number Publication Date
GB246096A true GB246096A (en) 1926-01-28

Family

ID=9703474

Family Applications (1)

Application Number Title Priority Date Filing Date
GB38524A Expired GB246096A (en) 1924-01-05 1924-01-05 Improvements in telephones and the like

Country Status (2)

Country Link
FR (2) FR588714A (en)
GB (1) GB246096A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0178854A2 (en) * 1984-10-15 1986-04-23 Deere & Company Ultrasonic horn assembly
US4713799A (en) * 1984-10-15 1987-12-15 Deere & Company Ultrasonic horn with sidelobe suppressing centerpiece

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0178854A2 (en) * 1984-10-15 1986-04-23 Deere & Company Ultrasonic horn assembly
EP0178854A3 (en) * 1984-10-15 1987-04-15 Deere & Company Ultrasonic horn assembly
US4713799A (en) * 1984-10-15 1987-12-15 Deere & Company Ultrasonic horn with sidelobe suppressing centerpiece
AU573382B2 (en) * 1984-10-15 1988-06-02 Deere & Company Ultrasonic horn with sidelobe suppression

Also Published As

Publication number Publication date
FR588714A (en) 1925-05-14
FR29915E (en) 1925-12-10

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