FR703714A - Vibrating membrane for phonic devices - Google Patents

Vibrating membrane for phonic devices

Info

Publication number
FR703714A
FR703714A FR703714DA FR703714A FR 703714 A FR703714 A FR 703714A FR 703714D A FR703714D A FR 703714DA FR 703714 A FR703714 A FR 703714A
Authority
FR
France
Prior art keywords
vibrating membrane
phonic
devices
phonic devices
vibrating
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
Other languages
French (fr)
Inventor
Hans Schmidt
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 filed Critical
Application granted granted Critical
Publication of FR703714A publication Critical patent/FR703714A/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
    • B21D51/00—Making hollow objects
    • B21D51/02—Making hollow objects characterised by the structure of the objects
    • B21D51/10—Making hollow objects characterised by the structure of the objects conically or cylindrically shaped objects

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
FR703714D 1929-10-15 1930-10-15 Vibrating membrane for phonic devices Expired FR703714A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE703714X 1929-10-15

Publications (1)

Publication Number Publication Date
FR703714A true FR703714A (en) 1931-05-05

Family

ID=6614829

Family Applications (1)

Application Number Title Priority Date Filing Date
FR703714D Expired FR703714A (en) 1929-10-15 1930-10-15 Vibrating membrane for phonic devices

Country Status (1)

Country Link
FR (1) FR703714A (en)

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