DE976596C - Foam membrane for speakers - Google Patents

Foam membrane for speakers

Info

Publication number
DE976596C
DE976596C DE1951P0012254 DEP0012254A DE976596C DE 976596 C DE976596 C DE 976596C DE 1951P0012254 DE1951P0012254 DE 1951P0012254 DE P0012254 A DEP0012254 A DE P0012254A DE 976596 C DE976596 C DE 976596C
Authority
DE
Germany
Prior art keywords
foam
membrane
speakers
foam membrane
substances
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
DE1951P0012254
Other languages
German (de)
Inventor
Emil Dr Podszus
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
Application granted granted Critical
Publication of DE976596C publication Critical patent/DE976596C/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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/04—Condition, form or state of moulded material or of the material to be shaped cellular or porous
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/34—Electrical apparatus, e.g. sparking plugs or parts thereof
    • B29L2031/3418—Loud speakers

Landscapes

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

Description

(WiGBl. S. 175)(WiGBl. P. 175)

AUSGEGEBEN AM 12. DEZEMBER 1963ISSUED DECEMBER 12, 1963

P 12254 VIII alsia*P 12254 VIII alsia *

ist als Erfinder genannt wordenhas been named as the inventor

Schaummembran für LautsprecherFoam membrane for loudspeakers

Das Hauptpatent hat angefangen am 8 Juni 1950The main patent started on June 8, 1950

Patentanmeldung bekanntgemacht am 23. August 1956Patent application published on August 23, 1956

Patenterteilung bekanntgemacht am 21. November 1963Patent issued November 21, 1963

Das Hauptpatent 976 429 bezieht sich auf eine Lautsprechermembran mit aus Lacken oder lackähnlichen Stoffen durch Zusatz von gasförmigen Beimengungen erzeugtem und zum Erstarren gebrachtem Schaum und hat eine Membran zum Gegenstand, bei der die nach dem Erstarren verbleibende Grundmasse des Schaumgebildes eine große Härte (über 13 kg/mm2 nach Brinell) und Elastizitätskonstante, eine Dichte zwischen 0,1 und 0,3 und eine Dicke von höchstens d = 3 (i-e"'*)min besitzt, wenn / die Fläche der Membran in cm2 ist. Mit derartigen Schaummembranen kann eine hohe akustische Güte erreicht werden.The main patent 976 429 relates to a loudspeaker diaphragm with foam produced from lacquers or lacquer-like substances by adding gaseous admixtures and made to solidify, and its subject matter is a diaphragm in which the basic mass of the foam structure remaining after solidification is very hard (over 13 kg / mm 2 according to Brinell) and elasticity constant, a density between 0.1 and 0.3 and a thickness of at most d = 3 (ie "'*) min, if / the area of the membrane is in cm 2. With such foam membranes a high acoustic quality can be achieved.

Die Anforderungen an Membranen sind je nach dem Anwendungsgebiet recht unterschiedlich; zweckmäßig werden vor allem sehr hart werdende Kunstharze od. dgl. verwendet1.The requirements for membranes are quite different depending on the area of application; It is advisable to use especially very hardening synthetic resins or the like 1 .

In besonderen Fällen wird aber außer großer Härte auch hohe Temperaturbeständigkeit und Wasserfestigkeit verlangt, z. B. für die Verwendung in tropischen Gebieten. Hierzu sind erfindungsgemäß harte Silikone geeignet, welche von den Lacken die größte Temperaturbeständigkeit besitzen und in hohem Grade wasserabstoßend sind. Die große Temperaturbeständigkeit bringt den Vorteil, daß auch als Treibmittel Stoffe benutzt werden können, welche einen genügend hohenIn special cases, however, in addition to great hardness, there is also high temperature resistance and Requires water resistance, e.g. B. for use in tropical areas. For this purpose are according to the invention hard silicones are suitable, which of the paints has the greatest temperature resistance and are highly water repellent. Which brings great temperature resistance the advantage that substances can also be used as blowing agents which have a sufficiently high level

309 754/2309 754/2

Zersetzungsdruck erst bei Temperaturen über 20O° C besitzen. Die besondere Struktur des Harzes ergibt bei hohen Temperaturen auch eine schnellere Verfestigung des Schaumes.Have decomposition pressure only at temperatures above 20O ° C. The special structure of the resin also results in faster solidification of the foam at high temperatures.

Claims (1)

PATENTANSPRUCH:PATENT CLAIM: Membran für Lautsprecher mit aus Lacken oder lackähnlichen Stoffen durch Zusatz von gasförmigen Beimengungen erzeugtem und zum Erstarren gebrachtem Schaum, bei dem die nach dem Erstarren verbleibende Grundmasse des Schaumgebildes eine große Härte (über 13 kg/mm2 nach Brinell) und Elastizitätskonstante, eine Dichte zwischen 0,1 und 0,3 und eine Dicke von höchstens d = 3 (1—e~//60jmm besitzt, wenn / die Fläche der Membran in cm2 ist, nach Patent 976429, dadurch gekennzeichnet, daß der Schaum ganz oder teilweise aus harten Silikonen besteht.Membrane for loudspeakers with foam produced from lacquers or lacquer-like substances by adding gaseous admixtures and solidified, in which the basic mass of the foam structure remaining after solidification has a high hardness (over 13 kg / mm 2 according to Brinell) and a constant of elasticity, a density between 0.1 and 0.3 and a thickness of at most d = 3 (1 - e ~ // 60 mm, if / the area of the membrane is in cm 2 , according to patent 976429, characterized in that the foam wholly or partially consists of hard silicone. © 609 580/317 8.56 (309 754/2 12.63)© 609 580/317 8.56 (309 754/2 12.63)
DE1951P0012254 1950-06-08 1951-01-21 Foam membrane for speakers Expired DE976596C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEP1809A DE976429C (en) 1950-06-08 1950-06-08 Foam membrane for loudspeakers and process for their manufacture

Publications (1)

Publication Number Publication Date
DE976596C true DE976596C (en) 1963-12-12

Family

ID=5647727

Family Applications (2)

Application Number Title Priority Date Filing Date
DEP1809A Expired DE976429C (en) 1950-06-08 1950-06-08 Foam membrane for loudspeakers and process for their manufacture
DE1951P0012254 Expired DE976596C (en) 1950-06-08 1951-01-21 Foam membrane for speakers

Family Applications Before (1)

Application Number Title Priority Date Filing Date
DEP1809A Expired DE976429C (en) 1950-06-08 1950-06-08 Foam membrane for loudspeakers and process for their manufacture

Country Status (1)

Country Link
DE (2) DE976429C (en)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE657241C (en) * 1938-02-28 Emil Podszus Dr Process for the production of thick-walled, piston-like vibrating large-area membranes
GB596893A (en) * 1945-08-03 1948-01-13 Cossor Ltd A C Improvements relating to acoustic reproducers
US1824664A (en) * 1929-08-19 1931-09-22 Ig Farbenindustrie Ag Sound box membrane
BE377376A (en) * 1930-02-15
DE636658C (en) * 1933-12-29 1936-10-15 I G Farbenindustrie Akt Ges Process for the production of insulating compounds
NL50893C (en) * 1937-02-15 1900-01-01
GB513289A (en) * 1937-12-18 1939-10-09 Helmut Sell Diaphragm for receiving or reproducing sound vibrations and method for its manufacture

Also Published As

Publication number Publication date
DE976429C (en) 1963-09-19

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