GB650747A - Process for shaping thin sheet metal - Google Patents

Process for shaping thin sheet metal

Info

Publication number
GB650747A
GB650747A GB34566/47A GB3456647A GB650747A GB 650747 A GB650747 A GB 650747A GB 34566/47 A GB34566/47 A GB 34566/47A GB 3456647 A GB3456647 A GB 3456647A GB 650747 A GB650747 A GB 650747A
Authority
GB
United Kingdom
Prior art keywords
diaphragm
plates
shaped
controlled
shape
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
GB34566/47A
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
Publication of GB650747A publication Critical patent/GB650747A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
    • B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
    • B21D26/021—Deforming sheet bodies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D35/00—Combined processes according to or processes combined with methods covered by groups B21D1/00 - B21D31/00
    • B21D35/002—Processes combined with methods covered by groups B21D1/00 - B21D31/00
    • B21D35/005—Processes combined with methods covered by groups B21D1/00 - B21D31/00 characterized by the material of the blank or the workpiece
    • B21D35/006—Blanks having varying thickness, e.g. tailored blanks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R31/00—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor
    • H04R31/003—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor for diaphragms or their outer suspension

Abstract

650,747. Stamping; making sound reproducing &c. diaphragms. CESATI, M. Dec. 30, 1947, No. 34566. Convention date, Sept. 2, 1944. [Classes 83 (ii) and 83 (iv)] Thin plates or strips for use as diaphragms or other vibrators for use in loud-speakers, microphones, &c. are shaped by means of directly applied fluid pressure; deformation being opposed and controlled by liquid on the other side,of the diaphragm, the escape of which can be regulated and measured. In one form the plate 1 to be shaped is clamped between other thin plates 4, 5 by rings 3, 6 and fluid pressure is applied at 8 and opposed by fluid controlled at 10. The shape of the container 9 may be that finally required for the diaphragm. In some cases the plates 4, 5 may be omitted. When the shape required is that of a segment of a sphere the container 9 need not conform to such shape. The Specification as open to inspection under Sect. 91 describes an arrangement in which the diaphragm is not confined on the side on which it is caused to bulge and the amount of displacement is controlled by the closing of an electric contact that may close a valve in the pressure supply line. Powder, wax or other means equivalent to a fluid may be employed. The plates 4, 5 may be of alloy consisting of 65-85 per cent of aluminium and the rest magnesium and the plates may be shaped to produce deformation of the diaphragm to increase the elasticity of the centre portion thereof. This subject-matter does not appear in the Specification as accepted.
GB34566/47A 1944-09-02 1947-12-30 Process for shaping thin sheet metal Expired GB650747A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT650747X 1944-09-02

Publications (1)

Publication Number Publication Date
GB650747A true GB650747A (en) 1951-02-28

Family

ID=11297523

Family Applications (1)

Application Number Title Priority Date Filing Date
GB34566/47A Expired GB650747A (en) 1944-09-02 1947-12-30 Process for shaping thin sheet metal

Country Status (1)

Country Link
GB (1) GB650747A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1011239B (en) * 1952-07-01 1957-06-27 Distillers Co Yeast Ltd Process for the production of dome-shaped, breakable diaphragms and vacuum supports as overpressure protection for pressure vessels
US2952042A (en) * 1956-08-31 1960-09-13 Hughes Aircraft Co Process for deep drawing plastic sheet
US3149596A (en) * 1961-06-13 1964-09-22 Gen Dynamics Corp Forming apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1011239B (en) * 1952-07-01 1957-06-27 Distillers Co Yeast Ltd Process for the production of dome-shaped, breakable diaphragms and vacuum supports as overpressure protection for pressure vessels
US2952042A (en) * 1956-08-31 1960-09-13 Hughes Aircraft Co Process for deep drawing plastic sheet
US3149596A (en) * 1961-06-13 1964-09-22 Gen Dynamics Corp Forming apparatus

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