FR402575A - Diaphragme à pointe inusable pour machines parlantes - Google Patents

Diaphragme à pointe inusable pour machines parlantes

Info

Publication number
FR402575A
FR402575A FR402575DA FR402575A FR 402575 A FR402575 A FR 402575A FR 402575D A FR402575D A FR 402575DA FR 402575 A FR402575 A FR 402575A
Authority
FR
France
Prior art keywords
wear
resistant diaphragm
talking machines
talking
machines
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
English (en)
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.)
G BALLU ET CIE SOC
Original Assignee
G BALLU ET CIE SOC
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 G BALLU ET CIE SOC filed Critical G BALLU ET CIE SOC
Application granted granted Critical
Publication of FR402575A publication Critical patent/FR402575A/fr
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B3/00—Recording by mechanical cutting, deforming or pressing, e.g. of grooves or pits; Reproducing by mechanical sensing; Record carriers therefor
    • G11B3/44—Styli, e.g. sapphire, diamond
    • G11B3/46—Constructions or forms ; Dispositions or mountings, e.g. attachment of point to shank
FR402575D 1909-04-29 1909-04-29 Diaphragme à pointe inusable pour machines parlantes Expired FR402575A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR402575T 1909-04-29

Publications (1)

Publication Number Publication Date
FR402575A true FR402575A (fr) 1909-10-12

Family

ID=1447288

Family Applications (1)

Application Number Title Priority Date Filing Date
FR402575D Expired FR402575A (fr) 1909-04-29 1909-04-29 Diaphragme à pointe inusable pour machines parlantes

Country Status (1)

Country Link
FR (1) FR402575A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2564136A (en) * 1943-03-04 1951-08-14 Hartford Nat Bank & Trust Co Corundum crystal recording or reproducing member
US2658763A (en) * 1948-07-31 1953-11-10 Rca Corp Phonograph pickup device and the like

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2564136A (en) * 1943-03-04 1951-08-14 Hartford Nat Bank & Trust Co Corundum crystal recording or reproducing member
US2658763A (en) * 1948-07-31 1953-11-10 Rca Corp Phonograph pickup device and the like

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