US1792494A - Phonographic needle - Google Patents
Phonographic needle Download PDFInfo
- Publication number
- US1792494A US1792494A US105637A US10563726A US1792494A US 1792494 A US1792494 A US 1792494A US 105637 A US105637 A US 105637A US 10563726 A US10563726 A US 10563726A US 1792494 A US1792494 A US 1792494A
- Authority
- US
- United States
- Prior art keywords
- needle
- metal
- chromium
- ductile
- tip
- 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
- 229910052751 metal Inorganic materials 0.000 description 16
- 239000002184 metal Substances 0.000 description 16
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical group [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 10
- 229910052804 chromium Inorganic materials 0.000 description 9
- 239000011651 chromium Substances 0.000 description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 5
- 229910052802 copper Inorganic materials 0.000 description 5
- 239000010949 copper Substances 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 229910001369 Brass Inorganic materials 0.000 description 2
- 239000010951 brass Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000001464 adherent effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten 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
- G11B3/44—Styli, e.g. sapphire, diamond
- G11B3/46—Constructions or forms ; Dispositions or mountings, e.g. attachment of point to shank
- G11B3/48—Needles
-
- 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
- Y10S76/00—Metal tools and implements, making
- Y10S76/04—Chromium
Definitions
- This invention relates to phonograph needles and has as its object a needle which will reproduce faithfully, without injury to the record, will be light in weight and have a shell of extreme hardness which will prolong its life.
- the ordinary phonograph needle is a pointed steel rod of small diameter, the point being sufficiently fine .to permit it to follow the groove in the record.
- a second type of needle which is used quite extensively is known as the tungsten wire needle. This type is an improvement over the steel needle, in that it maybe used for a number of records before it is necessary to discard it.
- Chromium has marked adherent qualities and although extremely hard, thin sheets or layers are ductile.
- Fig. 2 represents a hollow type of needle.
- the body 50f the needle may be-of steel, copper, brass or other suitable metal, on which a metal-having the physical properties of chromium may be coated.
- the enclosing metal tip 6 is. pref- 1926. Serial No. 105,637.
- the hollow type needle of Fig. 2 consists of a shell 7 of copper, or similar metal hav-.
- a coating 8 of a metal having the physical properties of chromium Needles of this type may be made by forming wax, or similar composition material, into the form desired and then plating this wax form with ing the tip end portion of the same.
- a phonograph needle comprising a main body of copper having its tip enclosed by a coating of ductile chromium.
- a phonograph needle comprising a hollow body of one metal and a filn of hard, close grained, ductile metal coated on the tip of said body.
- a phonograph needle comprising a hollow body of copper and a film of chromium enclosing the tip of said body,
- a phonograph needle comprising a main body portion of soft metal, and a film of" hard close grain ductile metal enclosing the end portion of the same.
- a reproduoer needle comprising a hollow body portion of one metal provided, with a closed, pointed end coatedwith a hard, ductile metal.
- a reproducer needle comprising a hollow body portion of relatively soft metal provided with a closed, pointed end coated with a hard, close-grained, ductile metal.
Description
Feb. 17, 1931. H. c. HARRISON ET AL 1,792,494
PHONOGRAPHIC NEEDLE Filed April 30, 1926 lm/e/r'fbra: flan/@104. Anderson Patented Feb. 1 7 1931 UNITED STATES PATENT orifice:
HENRY'G. HARRISON, 01' PORT WASHINGTON, NEW YORK, AND HARVEY A. ANDER- SON, OF MONTCLAIR, NEW JERSEY, ASSIGNORS TO BELL TELEPHONE I ABORA- TORIES, INCORPORATED, OF NEW YORK, N. Y., A CORPORATION OF YORK PHONOGRAQPHIC NEEDLE Application filed April 30,
This invention relates to phonograph needles and has as its object a needle which will reproduce faithfully, without injury to the record, will be light in weight and have a shell of extreme hardness which will prolong its life.
The ordinary phonograph needle is a pointed steel rod of small diameter, the point being sufficiently fine .to permit it to follow the groove in the record. These needles ,are-
generally used but once and are then dis carded. A second type of needle, which is used quite extensively is known as the tungsten wire needle. This type is an improvement over the steel needle, in that it maybe used for a number of records before it is necessary to discard it.
In accordance with this invention a hard,
close grained, ductile metal'is plated on a base, having the needle shape desired. One
metal that serves this purpose very satisfactorily is chromium. I
The plating is done preferably by electro- I lytically depositing chrom um or =simi 1ar metal on a body of metal by any approved method, oneof such methods being described in Patent No. 1,496,845 to George Grube,
June 10, 1924.
Chromium has marked adherent qualities and although extremely hard, thin sheets or layers are ductile. A needle made of steel, copper or brass, having its tip plated with chromium, when applied to a record quickly conforms to the configuration of the groove and does not'wear the record to such an extent asthe ordinary steel or tungsten needle. Because of the fine grain and smoothness of the. chromium coating, the amount of scratching sound when playing a record is materially reduced.
Fig. 1, of the drawing attached hereto,
represents on a large scale a section of one.
type of needle constructed in accordance with this invention and Fig. 2 represents a hollow type of needle.
- Referring to Fig. 1, the body 50f the needle may be-of steel, copper, brass or other suitable metal, on which a metal-having the physical properties of chromium may be coated. The enclosing metal tip 6 is. pref- 1926. Serial No. 105,637.
erably electrolytically deposited chromium. The hollow type needle of Fig. 2 consists of a shell 7 of copper, or similar metal hav-.
ing a coating 8 of a metal having the physical properties of chromium.. Needles of this type may be made by forming wax, or similar composition material, into the form desired and then plating this wax form with ing the tip end portion of the same.
2. A phonograph needle comprising a main body of copper having its tip enclosed by a coating of ductile chromium.
3. A phonograph needle comprising a hollow body of one metal and a filn of hard, close grained, ductile metal coated on the tip of said body.
4. A phonograph needle comprising a hollow body of copper and a film of chromium enclosing the tip of said body,
5. A phonograph needle comprising a main body portion of soft metal, and a film of" hard close grain ductile metal enclosing the end portion of the same. p 6. A reproduoer needle comprising a hollow body portion of one metal provided, with a closed, pointed end coatedwith a hard, ductile metal. l
. .7. A reproducer needle comprising a hollow body portion of relatively soft metal provided with a closed, pointed end coated with a hard, close-grained, ductile metal.
In witness whereof, we hereunto'subscribc our names this 29 day of April. A. D. 1926.
HENRY C. HARRISON.
A. ANDERSON.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US105637A US1792494A (en) | 1926-04-30 | 1926-04-30 | Phonographic needle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US105637A US1792494A (en) | 1926-04-30 | 1926-04-30 | Phonographic needle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US1792494A true US1792494A (en) | 1931-02-17 |
Family
ID=22306954
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US105637A Expired - Lifetime US1792494A (en) | 1926-04-30 | 1926-04-30 | Phonographic needle |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US1792494A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2519488A (en) * | 1945-02-26 | 1950-08-22 | Edward L Mack | Sound reproducing stylus |
| US2562707A (en) * | 1945-01-09 | 1951-07-31 | Gen Electric | Stylus for magnetic recording and reproducing apparatus |
| US3961797A (en) * | 1973-05-14 | 1976-06-08 | Pioneer Electronic Corporation | Phonograph pickup cartridge stylus rod |
-
1926
- 1926-04-30 US US105637A patent/US1792494A/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2562707A (en) * | 1945-01-09 | 1951-07-31 | Gen Electric | Stylus for magnetic recording and reproducing apparatus |
| US2519488A (en) * | 1945-02-26 | 1950-08-22 | Edward L Mack | Sound reproducing stylus |
| US3961797A (en) * | 1973-05-14 | 1976-06-08 | Pioneer Electronic Corporation | Phonograph pickup cartridge stylus rod |
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