DE600192C - Stiffened seamless membrane made of fibrous materials for acoustic purposes, manufactured using the casting or Schoepf process - Google Patents

Stiffened seamless membrane made of fibrous materials for acoustic purposes, manufactured using the casting or Schoepf process

Info

Publication number
DE600192C
DE600192C DET42093D DET0042093D DE600192C DE 600192 C DE600192 C DE 600192C DE T42093 D DET42093 D DE T42093D DE T0042093 D DET0042093 D DE T0042093D DE 600192 C DE600192 C DE 600192C
Authority
DE
Germany
Prior art keywords
casting
stiffened
manufactured
fibrous materials
schoepf
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
DET42093D
Other languages
German (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.)
Telefunken AG
Original Assignee
Telefunken AG
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.)
Publication date
Priority to DET42093D priority Critical patent/DE600192C/en
Application granted granted Critical
Publication of DE600192C publication Critical patent/DE600192C/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
    • H04R7/14—Non-planar diaphragms or cones corrugated, pleated or ribbed

Landscapes

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

Description

Nach dem Guß- bzw. Schöpfverfahren hergestellte versteifte nahtlose Membran aus Faserstoffen für akustische Zwecke Gegenstand der Erfindung ist eine aus Faserstoffen, vorzugsweise aus Pappenguß hergestellte nahtlose Membran für akustische Zwecke.Stiffened seamless produced by the casting or scooping process Membrane made of fibrous materials for acoustic purposes The invention is a seamless membrane made of fibrous materials, preferably cast cardboard, for acoustic Purposes.

Derartige Membranen sind an sich bekannt. Diese an sich recht brauchbaren Membranen leiden darunter, daß sie für die hohen Anforderungen der Akustik nicht steif genug sind. Es ist deshalb vorgeschlagen worden, diese Pappengußmembranen gleich beim Gußvorgang mit Rippen aus Papierstoff auszubilden. Um eine möglichst starre Membran zu erhalten, müßten aber diese Rippen sehr stark ausfallen, wodurch die Masse der Membran unnötig groß wird.Such membranes are known per se. These in themselves are quite useful Membranes suffer from the fact that they are not suitable for the high demands of acoustics are stiff enough. It has therefore been proposed to use these paperboard diaphragms to be formed with ribs made of paper stock during the casting process. To get one as possible To get a rigid membrane, these ribs would have to be very strong, whereby the mass of the membrane becomes unnecessarily large.

Gemäß der Erfindung werden diese Nachteile dadurch vermieden, daß bereits beim Herstellungsprozeß Versteifungsrippen oder Versteifungsgerüste aus vergütetem Leichtmetall (Aluminium- oder Berylliumlegierungen) oder anderen harten und leichten Stoffen in die Form eingelegt werden, so daß nachher die fertige Membran ganz oder teilweise von dem Faserstoff umgebene Versteifungsrippen oder -gerüste aufweist.According to the invention, these disadvantages are avoided in that stiffening ribs or stiffening frames during the manufacturing process Quenched and tempered light metal (aluminum or beryllium alloys) or other hard ones and light fabrics are placed in the mold, so that afterwards the finished membrane stiffening ribs or frames completely or partially surrounded by the fibrous material having.

Die Abbildung veranschaulicht ein Ausführungsbeispiel des Erfindungsgegenstandes, und zwar ist eine Kegelmembran dargestellt.The figure illustrates an embodiment of the subject matter of the invention, namely a cone diaphragm is shown.

Die aus vergütetem Leichtmetall hergestellten, gegebenenfalls profilierten Rippen i sind in die aus Faserstoff bestehende Membran 2 eingebettet.Those made of tempered light metal, possibly profiled Ribs i are embedded in the membrane 2 made of fiber material.

Claims (1)

PATRNT ANSPRUCFI Nach dem Guß- bzw. Schöpfverfahren hergestellte versteifte nahtlose Membran aus Faserstoffen für akustische Zwecke, dadurch gekennzeichnet, daß sie mit von dem Membranwerkstoff ganz oder teilweise umschlossenen, bereits beim Herstellungsprozeß eingelegten Versteifungsrippen oder -gerüsten, vorzugsweise aus vergütetem Leichtmetall, versehen ist.PATRNT ANSPRUCFI Stiffened stiffeners manufactured using the casting or scooping process seamless membrane made of fibrous materials for acoustic purposes, characterized in that that they are already completely or partially enclosed by the membrane material stiffening ribs or frameworks inserted during the manufacturing process, preferably made of tempered light metal.
DET42093D 1933-02-08 Stiffened seamless membrane made of fibrous materials for acoustic purposes, manufactured using the casting or Schoepf process Expired DE600192C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DET42093D DE600192C (en) 1933-02-08 Stiffened seamless membrane made of fibrous materials for acoustic purposes, manufactured using the casting or Schoepf process

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DET42093D DE600192C (en) 1933-02-08 Stiffened seamless membrane made of fibrous materials for acoustic purposes, manufactured using the casting or Schoepf process
DE2013792X 1933-02-08

Publications (1)

Publication Number Publication Date
DE600192C true DE600192C (en) 1934-07-17

Family

ID=26000495

Family Applications (1)

Application Number Title Priority Date Filing Date
DET42093D Expired DE600192C (en) 1933-02-08 Stiffened seamless membrane made of fibrous materials for acoustic purposes, manufactured using the casting or Schoepf process

Country Status (1)

Country Link
DE (1) DE600192C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE744286C (en) * 1937-03-02 1944-01-13 Siemens Ag Membrane produced from pulp by dipping or pouring for electroacoustic devices
DE969535C (en) * 1942-04-14 1958-06-12 Siemens Ag Oscillating system with a membrane made of polyvinyl chloride film

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE744286C (en) * 1937-03-02 1944-01-13 Siemens Ag Membrane produced from pulp by dipping or pouring for electroacoustic devices
DE969535C (en) * 1942-04-14 1958-06-12 Siemens Ag Oscillating system with a membrane made of polyvinyl chloride film

Similar Documents

Publication Publication Date Title
DE600192C (en) Stiffened seamless membrane made of fibrous materials for acoustic purposes, manufactured using the casting or Schoepf process
AT142000B (en) Beam made of sheet metal.
DE412884C (en) Process for the production of pliable masses from cellulose esters
DE937125C (en) Filter bag consisting of several layers of cotton or cellulose and cellulose
DE550623C (en) Membrane for funnelless speakers
DE504954C (en) Method for the production of a material that can be processed into hollow bodies, in particular packs, by mechanical shaping
DE893011C (en) Process for the production of neutral gray, light-absorbing layers such as gray wedges or gray filters, which contain colloidal graphite as the light-absorbing medium
DE870618C (en) Light metal pistons for internal combustion engines
DE551197C (en) Process for the production of sound box diaphragms from cellulose derivatives
DE553227C (en) packing material
DE716381C (en) Process for producing secondary radiation diaphragms with layers
DE735414C (en) Process for the production of bitumen-bound lightweight insulation bodies
DE677210C (en) Molded membrane made of metal
DE361228C (en) Process for the production of boards from sugar cane fibers
DE611943C (en) Method of making seamless retaining corners from transparent fabrics, e.g. Gelatine, for pictures
DE877319C (en) Process to increase the yield strength of Thomasstahl
AT132134B (en) Clamping device for processing bellows.
DE1011239B (en) Process for the production of dome-shaped, breakable diaphragms and vacuum supports as overpressure protection for pressure vessels
AT116278B (en) Process for the production of grinding and polishing wheels.
DE742609C (en) Use of refined aluminum alloys for deep-drawing purposes
DE334907C (en) Locomotive fire box
DE544006C (en) Water-cooled, reinforced mold for centrifugal casting
DE514292C (en) Process for the production of curved resonance bodies
AT111673B (en) Nozzle for drawing sheet glass.
DE743323C (en) Process for the production of concave curved projection screens