GB374102A - Improvements in the manufacture of gramophone records - Google Patents
Improvements in the manufacture of gramophone recordsInfo
- Publication number
- GB374102A GB374102A GB650831A GB650831A GB374102A GB 374102 A GB374102 A GB 374102A GB 650831 A GB650831 A GB 650831A GB 650831 A GB650831 A GB 650831A GB 374102 A GB374102 A GB 374102A
- Authority
- GB
- United Kingdom
- Prior art keywords
- parts
- record
- oxide
- mixture
- aluminium
- 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
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Gramophone record material made from cellulose derivatives together with solvents, plasticizers and fillers, such as asbestos powder, has an oxide or salt of aluminium or a mixture of these, combined therewith to enable the resulting homogeneous records made therefrom in a press to support the stylus properly. The quantity of the added material varies with the flexibility and thickness required in the record. A suitable record composition comprises acetyl cellulose, 250 parts by weight, triphenyl phosphate, 50 parts, diacetone alcohol, 35 parts, triacetin, 10 parts, acetone, 1250 parts, and aluminium oxide or silicate or a mixture thereof, 35 parts. The added material may be previously mixed or diluted with compounds of the alkaline-earth metals such as magnesium oxide. Specifications 4953/09, 192,107, 326,765, [all in Class 70, Indiarubber &c.], and 348,597 are referred to.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB650831A GB374102A (en) | 1931-03-03 | 1931-03-03 | Improvements in the manufacture of gramophone records |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB650831A GB374102A (en) | 1931-03-03 | 1931-03-03 | Improvements in the manufacture of gramophone records |
Publications (1)
Publication Number | Publication Date |
---|---|
GB374102A true GB374102A (en) | 1932-06-06 |
Family
ID=9815791
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB650831A Expired GB374102A (en) | 1931-03-03 | 1931-03-03 | Improvements in the manufacture of gramophone records |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB374102A (en) |
-
1931
- 1931-03-03 GB GB650831A patent/GB374102A/en not_active Expired
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