US1734139A - Process of making master records - Google Patents
Process of making master records Download PDFInfo
- Publication number
- US1734139A US1734139A US180805A US18080527A US1734139A US 1734139 A US1734139 A US 1734139A US 180805 A US180805 A US 180805A US 18080527 A US18080527 A US 18080527A US 1734139 A US1734139 A US 1734139A
- Authority
- US
- United States
- Prior art keywords
- record
- master
- master records
- making master
- records
- 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
- 238000000034 method Methods 0.000 title description 9
- 239000003507 refrigerant Substances 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 1
Images
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
- G11B3/68—Record carriers
- G11B3/70—Record carriers characterised by the selection of material or structure; Processes or apparatus specially adapted for manufacturing record carriers
Definitions
- This invention aims to provide a novel process for producing a master talking machine recordand, especially, to provide a novel process for hardening master records,
- Figure 1 shows in plan, a master phonograph record, in position to be hardened by the process hereinafter described;
- Figure 2 is a cross section of the structure shown in Figure 1.
- the numeral 1 denotes a master record
- the method maybe used in connection with master records for making talking machines of any desired kind.
- the record After the selection has been recorded on the record 1, the record is hardened by cooling the record, and by cooling it to a temperature below that of the surrounding air, the record being subjected to the action of a refrigerant, liquid air being suggested.
- the record may be placed upon a suitable support 3.
- a cavity 4 in the record, and in this cavity, the liquid air or other refrigerant is placed, as shown at 5.
- the temperature of the record is lowered
Description
Nov. 5, 1929, w. w. MCLAREN 1334339 PROCESS OF MAKING MASTER RECQRDS Filed April 4, 192'? UNITED STATES PATENT OFFICE WILLIAM WIMCLAREN, OF BIRMINGHAM, ALABA MA PROCESS OF MAKIN G MASTER RECORDS Application filed April 4, 1927. Serial No. 180,805.
This invention aims to provide a novel process for producing a master talking machine recordand, especially, to provide a novel process for hardening master records,
In the drawings Figure 1 shows in plan, a master phonograph record, in position to be hardened by the process hereinafter described;
Figure 2 is a cross section of the structure shown in Figure 1.
The numeral 1 denotes a master record,
I adapted to be used for the making of talking machine records of the disk type, although,
in practice, the method maybe used in connection with master records for making talking machines of any desired kind.
After the selection has been recorded on the record 1, the record is hardened by cooling the record, and by cooling it to a temperature below that of the surrounding air, the record being subjected to the action of a refrigerant, liquid air being suggested.
If desired, after the selection has been recorded on the record 1, as shown at 2, the, record may be placed upon a suitable support 3. There is a cavity 4 in the record, and in this cavity, the liquid air or other refrigerant is placed, as shown at 5.
The temperature of the record is lowered,
and the record is hardened, the record being made of any of the materials now employed for that purpose.
Although the hardening of the record lasts for a short 'time only, ordinarily, the advantages to be gained are that immediate re sults are produced, the master record being hardened so as to bring about a faithful reproduction or copy of the selection that has been recorded.
I What is claimed is A method of hardening a master record in the talking machine art, the method comprising retaining a refrigerant temporarily in an open cavity in the record.
In testimony that I claim the foregoing as my own, I have hereto aflixed my signature.
WILLIAM W. MCLAREN.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US180805A US1734139A (en) | 1927-04-04 | 1927-04-04 | Process of making master records |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US180805A US1734139A (en) | 1927-04-04 | 1927-04-04 | Process of making master records |
Publications (1)
Publication Number | Publication Date |
---|---|
US1734139A true US1734139A (en) | 1929-11-05 |
Family
ID=22661826
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US180805A Expired - Lifetime US1734139A (en) | 1927-04-04 | 1927-04-04 | Process of making master records |
Country Status (1)
Country | Link |
---|---|
US (1) | US1734139A (en) |
-
1927
- 1927-04-04 US US180805A patent/US1734139A/en not_active Expired - Lifetime
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