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GB548278A - Improvements in loud speakers - Google Patents

Improvements in loud speakers

Info

Publication number
GB548278A
GB548278A GB1177/41A GB117741A GB548278A GB 548278 A GB548278 A GB 548278A GB 1177/41 A GB1177/41 A GB 1177/41A GB 117741 A GB117741 A GB 117741A GB 548278 A GB548278 A GB 548278A
Authority
GB
United Kingdom
Prior art keywords
mass
resonance
spider
diaphragm
loud
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
GB1177/41A
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.)
Philco Radio and Television Corp
Original Assignee
Philco Radio and Television Corp
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 Philco Radio and Television Corp filed Critical Philco Radio and Television Corp
Publication of GB548278A publication Critical patent/GB548278A/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
    • 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
    • H04R7/122—Non-planar diaphragms or cones comprising a plurality of sections or layers

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)

Abstract

548,278. Loud-speakers. PHILCO RADIO & TELEVISION CORPORATION. Jan. 29, 1941, No. 1177. Convention date, Jan. 29, 1940. [Class 40 (iv)] In order to .improve the frequency response characteristic of loud-speakers by diminishing the effect of cabinet resonance, an auxiliary diaphragm or other means having both compliance and mass is provided which in the resonance range serves as a load to damp the resonance effects and in the range of lower frequencies increases the effective mass of the main diaphragm so as to improve the reproduction of low frequencies. The auxiliary means may comprise (1) an annular diaphragm 6, Fig. 2, carrying a small annular mass 7 of rubber, the ring 7 being closed by a dust cover 8.; (2) a centering spider 9, Fig. 5, loaded with a small mass 10 which may be damped by a light strip 11 secured at its ends to the cone or spider, or by impregnating the spider with a resinous damping material; or (3) a ring 12, Fig. 6,.of sponge rubber attached to the cone. The mass and compliance of the auxiliary means is such that its natural resonance is the same as the cabinet resonance and thus damps the latter.
GB1177/41A 1940-01-29 1941-01-29 Improvements in loud speakers Expired GB548278A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US548278XA 1940-01-29 1940-01-29

Publications (1)

Publication Number Publication Date
GB548278A true GB548278A (en) 1942-10-05

Family

ID=21993785

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1177/41A Expired GB548278A (en) 1940-01-29 1941-01-29 Improvements in loud speakers

Country Status (1)

Country Link
GB (1) GB548278A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2489862A (en) * 1943-01-07 1949-11-29 Gen Electric Damping for dynamic loudspeakers

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2489862A (en) * 1943-01-07 1949-11-29 Gen Electric Damping for dynamic loudspeakers

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