US1764120A - Sound-reproducing mechanism - Google Patents
Sound-reproducing mechanism Download PDFInfo
- Publication number
- US1764120A US1764120A US364549A US36454929A US1764120A US 1764120 A US1764120 A US 1764120A US 364549 A US364549 A US 364549A US 36454929 A US36454929 A US 36454929A US 1764120 A US1764120 A US 1764120A
- Authority
- US
- United States
- Prior art keywords
- sound
- strip
- trace
- record
- reproducing mechanism
- 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 - Lifetime
Links
- 230000005291 magnetic effect Effects 0.000 description 4
- 229910052797 bismuth Inorganic materials 0.000 description 3
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 229920002160 Celluloid Polymers 0.000 description 1
- 230000005292 diamagnetic effect Effects 0.000 description 1
- 239000002889 diamagnetic material Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Images
Classifications
-
- 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
-
- 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
- G11B5/127—Structure or manufacture of heads, e.g. inductive
-
- 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
- G11B5/74—Record carriers characterised by the form, e.g. sheet shaped to wrap around a drum
- G11B5/78—Tape carriers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S29/00—Metal working
- Y10S29/028—Magnetic recording digest
Definitions
- the bismuth is hightly diamagnetic and the sound record so produced will when drawn through a magnetic field, so influence the field as to produce electro-magnetic disturbances which may be utilized'to reproduce as sound the "ariati'ons of the sound trace on the record.
- a record such as described may be used in connection with many different forms of electro-magnetic mechanism. I describe for that purpose two forms as shown in the accompanyi'ng drawings in which I Fig. 1 is a cross section, partly in elevation, of one form of the apparatus;-
- Fig. 2 a side elvation of a' modified form of the apparatus; and 1 i Fig. 3 a plan viewof a flexible strip with a soundtrace formed thereon in accordance .with my invention
- 85- 1 is the sound record which be formed of celluloid and which will, when .theapparatus is used in reproducing "sound in connection with moving pictures, bear the usual series of pictures thereon.
- 2 isthe sound trace. formed on the strip by'the apphcatlon of a coating of bismuth thereto,
- Fig. 2 a similar arrangement of the strip and electro-magnet is shown, but for the coil 4 there is substituted an armature 5 suspended from a stationary support .6"
- the sound trace 2 may have any form known to the art.
- a sound record formedas a fleicible" strip having a sound trace formed thereon of a highly diamagnetic material.
- a sound record having a sound trace formed thereon of a material highly diaina netic relative to the body of therecord.
- Beneath the 7 sound record strip is located an electro-magy '45 ing one side located close to the strip 1 so as to lie within the magnetic field produced net 3.
- Above the film -'I show a coiht havby the magnet 3.
- the turns of the coil may be crossways of the strip as shown or they e diamagne'tic
Description
June 17, 1930. P. A. ROBBINS 1,754,120
SOUND REPRODUCING MECHANISM Filed May 20, 1929 7%]. E LWE 'INVEN'TDRQ Patented June 1,7, 1930 UNITE STATES- PATENT OFFICE PERCY A. ROBBINS, OF HIGHLAND PARK, ILLINOIS souma nnrnonucme MECHANISM A1ip1icat ion filed May 20,
I attain my object by utilizing for thesound trace a coating of bismuthwhich may be applied in any convenient manner, as, for example, in t e form. of a self-drying paste or suspension Which;will ;produce an even coating when dry. The bismuth is hightly diamagnetic and the sound record so produced will when drawn through a magnetic field, so influence the field as to produce electro-magnetic disturbances which may be utilized'to reproduce as sound the "ariati'ons of the sound trace on the record. A record such as described may be used in connection with many different forms of electro-magnetic mechanism. I describe for that purpose two forms as shown in the accompanyi'ng drawings in which I Fig. 1 is a cross section, partly in elevation, of one form of the apparatus;-
Fig. 2 a side elvation of a' modified form of the apparatus; and 1 i Fig. 3 a plan viewof a flexible strip with a soundtrace formed thereon in accordance .with my invention, 85- 1 is the sound record which be formed of celluloid and which will, when .theapparatus is used in reproducing "sound in connection with moving pictures, bear the usual series of pictures thereon. 2 isthe sound trace. formed on the strip by'the apphcatlon of a coating of bismuth thereto,
will usually 1929. Serial No. 364,548.
sound trace passes through the magnetic field its varying width and position cause fluctuationsand disturbances in the flux flow and these variations in the field induce undulating currents of electricity in the coil.
In Fig. 2 a similar arrangement of the strip and electro-magnet is shown, but for the coil 4 there is substituted an armature 5 suspended from a stationary support .6"
in a state of stable equilibrium; This armature carries a mirror 7. The variations .in v
the positions of the lines of 'force in the magnetic field will necessarilyvibrate the armature and thus cause a beam of light from a source 8 to be directed towards. a
light-sensitive cell 9 included in an electric circuit. Variations of the illumination of the l-ight-s'ensitive'celldue to the vibrations of the mirror will thus'cause an undulatory current to flow in the circuit of the light sensitive cell, which current may be suitably amplified and converted into sound waves.
The sound trace 2 may have any form known to the art.
What I claim is:
1. A sound record formedas a fleicible" strip having a sound trace formed thereon of a highly diamagnetic material.
2. A sound record formed as afiexiblc strip having a sound trace formed thereon of bismuth.
. 3. A sound record having a sound trace formed thereon of a material highly diaina netic relative to the body of therecord.
signed at Highland Park, 111. this 8th day of May, 1929. a. PERCY ROBBINS.
as hereinbefore referred to. Beneath the 7 sound record strip is located an electro-magy '45 ing one side located close to the strip 1 so as to lie within the magnetic field produced net 3. Above the film -'I show a coiht havby the magnet 3. The turns of the coil may be crossways of the strip as shown or they e diamagne'tic
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US364549A US1764120A (en) | 1929-05-20 | 1929-05-20 | Sound-reproducing mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US364549A US1764120A (en) | 1929-05-20 | 1929-05-20 | Sound-reproducing mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US1764120A true US1764120A (en) | 1930-06-17 |
Family
ID=23434973
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US364549A Expired - Lifetime US1764120A (en) | 1929-05-20 | 1929-05-20 | Sound-reproducing mechanism |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US1764120A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2443756A (en) * | 1942-12-26 | 1948-06-22 | Brush Dev Co | Magnetic material |
| US2629784A (en) * | 1945-01-17 | 1953-02-24 | Fred B Daniels | Wide frequency-range magnetic recording and reproducing system |
| US2791310A (en) * | 1952-06-28 | 1957-05-07 | Rca Corp | Character printing and encoding apparatus |
| US2996763A (en) * | 1956-01-31 | 1961-08-22 | Gen Electric | Diamond material |
| US3210527A (en) * | 1961-06-12 | 1965-10-05 | Ibm | Magnetic reader |
-
1929
- 1929-05-20 US US364549A patent/US1764120A/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2443756A (en) * | 1942-12-26 | 1948-06-22 | Brush Dev Co | Magnetic material |
| US2629784A (en) * | 1945-01-17 | 1953-02-24 | Fred B Daniels | Wide frequency-range magnetic recording and reproducing system |
| US2791310A (en) * | 1952-06-28 | 1957-05-07 | Rca Corp | Character printing and encoding apparatus |
| US2996763A (en) * | 1956-01-31 | 1961-08-22 | Gen Electric | Diamond material |
| US3210527A (en) * | 1961-06-12 | 1965-10-05 | Ibm | Magnetic reader |
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