GB497800A - System of electromagnetic sound recording on metallic plates, ribbons or wires - Google Patents
System of electromagnetic sound recording on metallic plates, ribbons or wiresInfo
- Publication number
- GB497800A GB497800A GB17999/37A GB1799937A GB497800A GB 497800 A GB497800 A GB 497800A GB 17999/37 A GB17999/37 A GB 17999/37A GB 1799937 A GB1799937 A GB 1799937A GB 497800 A GB497800 A GB 497800A
- Authority
- GB
- United Kingdom
- Prior art keywords
- strip
- wire
- shows
- plane
- june
- 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
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/78—Television signal recording using magnetic recording
- H04N5/782—Television signal recording using magnetic recording on tape
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
- G11B5/52—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with simultaneous movement of head and record carrier, e.g. rotation of head
- G11B5/53—Disposition or mounting of heads on rotating support
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Manufacturing Of Magnetic Record Carriers (AREA)
Abstract
497,800. Telegraphones. MARZOCCHI, L. June 28, 1937, Nos. 17999 and 18000. Convention dates, June 26, 1936 and April 17, 1937. [Class 40 (ii)] In an electromagnetic recording system of the Poulsen type, the magnetizable wire or strip is given a uniform longitudinal movement whilst the electromagnets rotate round the axis of the wire or in a plane parallel or perpendicular to the plane of the moving strip. Fig. 1 shows the application to a wire 1 fed by rollers 3 from drum 2 to drum 5 through a hollow shaft 12 carrying the electromagnet 6 and rotated by driving means 16 in fixed bearings 13. The shaft is threaded to drive a worm wheel 17 geared to the rollers 3. A helical record trace is therefore impressed on the wire. The trace may be of single or multiple helical form. Fig. 4 shows the application to a strip, the electromagnets 21, 22, 23 being carried by a disc 26 rotated parallel to the plane of the moving strip 18 to produce traces of the form shown in Fig. 2. Means such as contact rings 25 permit of cutting out the magnets during the non-recording parts of their revolution. The other side of the strip may be recorded upon by using a second rotary disc 26<1>. Fig. 11 shows a strip record giving a uniform tone intensity as the magnets pass on to and off the strip. The central band A is of full tone intensity, the bands B, B<1> of gradually increasing and decreasing intensity and the bands C are unrecorded.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT497800X | 1936-06-26 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB497800A true GB497800A (en) | 1938-12-28 |
Family
ID=11271545
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB17999/37A Expired GB497800A (en) | 1936-06-26 | 1937-06-28 | System of electromagnetic sound recording on metallic plates, ribbons or wires |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB497800A (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE924591C (en) * | 1943-07-23 | 1955-03-03 | Aeg | Dictation device working according to the magnetic sound process with line-shaped transverse lettering |
DE932330C (en) * | 1949-07-19 | 1955-08-29 | Acec | Magnetic recording and reproducing apparatus |
DE936654C (en) * | 1951-07-07 | 1955-12-15 | Siemens Ag | Magnetic sound recorder |
DE972545C (en) * | 1951-05-24 | 1959-08-13 | Siemens Ag | Device for recording and playing back magnetic sound tracks on a sheet-shaped magnetic sound carrier |
DE1082060B (en) * | 1955-05-27 | 1960-05-19 | Acec | Device for making copies of magnetograms |
DE1110899B (en) * | 1956-06-29 | 1961-07-13 | Richard C Meyer | Tape recorder with registration across the tape |
DE1128167B (en) * | 1957-06-17 | 1962-04-19 | Tdk Electronics Co Ltd | Device for sound recording and playback |
EP0110365A2 (en) * | 1982-11-29 | 1984-06-13 | Olympus Optical Co., Ltd. | Video tape recorder |
-
1937
- 1937-06-28 GB GB17999/37A patent/GB497800A/en not_active Expired
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE924591C (en) * | 1943-07-23 | 1955-03-03 | Aeg | Dictation device working according to the magnetic sound process with line-shaped transverse lettering |
DE932330C (en) * | 1949-07-19 | 1955-08-29 | Acec | Magnetic recording and reproducing apparatus |
DE972545C (en) * | 1951-05-24 | 1959-08-13 | Siemens Ag | Device for recording and playing back magnetic sound tracks on a sheet-shaped magnetic sound carrier |
DE936654C (en) * | 1951-07-07 | 1955-12-15 | Siemens Ag | Magnetic sound recorder |
DE1082060B (en) * | 1955-05-27 | 1960-05-19 | Acec | Device for making copies of magnetograms |
DE1110899B (en) * | 1956-06-29 | 1961-07-13 | Richard C Meyer | Tape recorder with registration across the tape |
DE1128167B (en) * | 1957-06-17 | 1962-04-19 | Tdk Electronics Co Ltd | Device for sound recording and playback |
EP0110365A2 (en) * | 1982-11-29 | 1984-06-13 | Olympus Optical Co., Ltd. | Video tape recorder |
EP0110365A3 (en) * | 1982-11-29 | 1985-06-19 | Olympus Optical Co., Ltd. | Video tape recorder |
US4642711A (en) * | 1982-11-29 | 1987-02-10 | Olympus Optical Co., Ltd. | Video tape recorder including vertical recording heads |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
AU450059B2 (en) | Magnetic recording medium incorporating fine acicular iron-based particles | |
GB497800A (en) | System of electromagnetic sound recording on metallic plates, ribbons or wires | |
GB491937A (en) | Method and device for reducing and multiplying acoustic frequencies | |
US2989595A (en) | Superimposed recording | |
AU473827B2 (en) | Magnetic recording and/or reproducing apparatus having rotary heads with still mode of operation | |
GB512766A (en) | Method and apparatus for recording and reproducing low frequency vibrations | |
GB453889A (en) | Apparatus for recording sound on a film or reproducing sound from a film record | |
CA988787A (en) | Process and apparatus for the production of magnetic recording media | |
CA962139A (en) | Magnetic recording media and a process for their production | |
US2758905A (en) | Magnetic recording apparatus | |
GB532116A (en) | Improvements in or relating to magnetic recording and reproducing apparatus for use with steel bands, wires or the like | |
GB1439313A (en) | Magnetic recording tape carrying a particular recording format | |
GB331008A (en) | Improvements in and relating to the duplication of sound records obtained by magnetic means | |
JPS5321902A (en) | Formation of carbonized protective film for magnetic recording medium | |
ES297165A1 (en) | Method of manufacture of parts of magnetic heads annular (Machine-translation by Google Translate, not legally binding) | |
JPS51140708A (en) | Magnetic head | |
JPS5321901A (en) | Formation of carbonized protective film for magnetic recording medium | |
JPS57158040A (en) | Magnetic transfer recorder | |
DE746660C (en) | Method of recording magnetograms | |
US2059550A (en) | Process and apparatus for the reproduction and recording of sounds | |
SU531190A1 (en) | Magnetic disk recorder | |
JPS527220A (en) | Jacket type magnetic recording medium | |
GB253226A (en) | Improved combined kinematograph and acoustic film and means for reproducing the sound record | |
JPS5233708A (en) | Method of controlling driving of rotating magnetic medium | |
SU145029A1 (en) | Magnetic recording-reproducing method |