US1802910A - Vibrating member for loud-speakers - Google Patents

Vibrating member for loud-speakers Download PDF

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Publication number
US1802910A
US1802910A US188077A US18807727A US1802910A US 1802910 A US1802910 A US 1802910A US 188077 A US188077 A US 188077A US 18807727 A US18807727 A US 18807727A US 1802910 A US1802910 A US 1802910A
Authority
US
United States
Prior art keywords
cone
diaphragm
ribbon
loud
speakers
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 - Lifetime
Application number
US188077A
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English (en)
Inventor
Jongh Gerrit Henri De
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.)
RCA Corp
Original Assignee
RCA 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 RCA Corp filed Critical RCA Corp
Application granted granted Critical
Publication of US1802910A publication Critical patent/US1802910A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H04R7/14—Non-planar diaphragms or cones corrugated, pleated or ribbed

Definitions

  • This invention has reference to conical diaphragms or vibrating members for loud speakers, said vibrating members serving to convert mechanical into acoustic vibrations.
  • the invention is especially applicable to conical vibrating members (hereinafter briefly referred to as cones) which vibrate as a stiff body such as, for example, with constructions in Whichvthe cone is stretched in the frame by means of a yielding substance secured to its border.
  • the vertex of the cone In the majority of cases when the mechanical vibration is transferred the vertex of the coneis usedas the point of application of the motive power. It has been found in such cases that by reason of the impulses exerted on the vertex the cone shows'a tendency to kink, which will have a harmful effeet on the sound oscillations.
  • the invention has for itsobject to so strengthen the cone as to suppress this kinking.
  • the surface of the cone is provided with strengthenings which are applied in a direction normal to the generating lines of the cone.
  • the strengthenings may be ribbonshaped strengthenings which are mounted on the surface and which surround the cone annularly.
  • the annular strengthening may be applied in a plane normal to the axis of the cone.
  • the said ribbon may be applied to the spread surface of the cone, that is upon the cone blank before it is shaped into a cone. If the cone is then bent so that the ribbon is on the outer surface it will surround the cone at a certain stress.
  • Figure 1 is a plan view of a cone according to the invention and Figure 2 is a perspective side View of the cone shown in Figure 1.
  • Figure 3 is a section on line 3-3 of Figure 1.
  • a pa er ribbon 11 is stuck to a paper cone 10 exact y midway between the vertex and the border.
  • the cone will show a tendency to kink. If, however, the ribbon 11 has been applied this ribbon will resist the outward kinking as well. as the inward kinking.
  • the aper ribbon may be applied either to the inner surface such as the bands 12 or to the outer surface orlboth innegland outeir surfaces.
  • t is ossi e not on to a l aper ri bons to the middle but hlso tii aiip ly similar surrounding paper ribbons to intermediate points. it is not necessary that these ribbons should surround the entire cone but they may be applied at determined intervals along the cone surface.
  • An acoustic device comprising a conical diaphragm, and strengthening bands fastened to said diaphragm.
  • An acoustic device comprising a conical diaphragm, and a strengthening ribbon fastened to said diaphragm around an annular path on said diaphra m.
  • An acoustic device comprising a conical diaphragm, and a plurality of strengthening ribbons secured to said diaphragm, said strengthening ribbons being arranged in planes normal to the axis of said conical diaphragm.
  • An acoustic device comprising a diaphragm member, and a paper ribbon secured to said diaphragm, the line of contact between said diaphragm and said ribbon being other than along the edge of said diaphragm.
  • An acoustic device comprising a conical diaphragm and means attached to said diaphragm between the apex and the base thereof for applying a stressing force to said diaphragm.
  • An acoustic device comprising a conical diaphragm, and means attached only to said diaphragm for setting up a stress in said diaphragm.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
US188077A 1926-05-14 1927-05-02 Vibrating member for loud-speakers Expired - Lifetime US1802910A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL1802910X 1926-05-14

Publications (1)

Publication Number Publication Date
US1802910A true US1802910A (en) 1931-04-28

Family

ID=19873123

Family Applications (1)

Application Number Title Priority Date Filing Date
US188077A Expired - Lifetime US1802910A (en) 1926-05-14 1927-05-02 Vibrating member for loud-speakers

Country Status (5)

Country Link
US (1) US1802910A (enrdf_load_stackoverflow)
BE (1) BE341622A (enrdf_load_stackoverflow)
DE (1) DE502053C (enrdf_load_stackoverflow)
FR (1) FR633364A (enrdf_load_stackoverflow)
NL (1) NL18673C (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2681390A (en) * 1951-01-23 1954-06-15 Rola Company Inc Diaphragm for loud speakers
US4562899A (en) * 1982-06-16 1986-01-07 Nippon Gakki Seizo Kabushiki Kaisha Diaphragm of electroacoustic transducer and method of manufacturing the same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2681390A (en) * 1951-01-23 1954-06-15 Rola Company Inc Diaphragm for loud speakers
US4562899A (en) * 1982-06-16 1986-01-07 Nippon Gakki Seizo Kabushiki Kaisha Diaphragm of electroacoustic transducer and method of manufacturing the same

Also Published As

Publication number Publication date
BE341622A (enrdf_load_stackoverflow)
FR633364A (fr) 1928-01-27
DE502053C (de) 1930-07-08
NL18673C (enrdf_load_stackoverflow)

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