FR520219A - Improvements to phonographs - Google Patents

Improvements to phonographs

Info

Publication number: FR520219A
Authority: FR; France
Prior art keywords: phonographs
Prior art date: 1916-11-24
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

FR520219A

Other languages

French (fr)

Inventor

Harry Sommerville Banfield

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.)

1916-11-24

Filing date

1920-07-10

Publication date

1921-06-22

1920-07-10 Application filed by Individual filed Critical Individual

1921-06-22 Application granted granted Critical

1921-06-22 Publication of FR520219A publication Critical patent/FR520219A/en

Status Expired legal-status Critical Current

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
- G11B3/02—Arrangements of heads
- G11B3/10—Arranging, supporting, or driving of heads or of transducers relatively to record carriers
- G11B3/42—Arranging, supporting, or driving of heads or of transducers relatively to record carriers with provision for adaptation or interchange of heads

FR520219A 1916-11-24 1920-07-10 Improvements to phonographs Expired FR520219A (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
US520219XA	1916-11-24	1916-11-24

Publications (1)

Publication Number	Publication Date
FR520219A true FR520219A (en)	1921-06-22

Family

ID=21974901

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
FR520219A Expired FR520219A (en)	1916-11-24	1920-07-10	Improvements to phonographs

Country Status (1)

Country	Link
FR (1)	FR520219A (en)

1920
- 1920-07-10 FR FR520219A patent/FR520219A/en not_active Expired

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