US1041983A - Phonograph-stylus. - Google Patents

Phonograph-stylus. Download PDF

Info

Publication number
US1041983A
US1041983A US56078710A US1910560787A US1041983A US 1041983 A US1041983 A US 1041983A US 56078710 A US56078710 A US 56078710A US 1910560787 A US1910560787 A US 1910560787A US 1041983 A US1041983 A US 1041983A
Authority
US
United States
Prior art keywords
stylus
crystal
boron
record
holder
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
Application number
US56078710A
Inventor
Thomas A Edison
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Thomas A Edison Inc
Original Assignee
Thomas A Edison Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Thomas A Edison Inc filed Critical Thomas A Edison Inc
Priority to US56078710A priority Critical patent/US1041983A/en
Application granted granted Critical
Publication of US1041983A publication Critical patent/US1041983A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B3/00Recording by mechanical cutting, deforming or pressing, e.g. of grooves or pits; Reproducing by mechanical sensing; Record carriers therefor
    • G11B3/44Styli, e.g. sapphire, diamond
    • G11B3/46Constructions or forms ; Dispositions or mountings, e.g. attachment of point to shank
    • G11B3/48Needles

Definitions

  • My invention relates to phonograph styluses.
  • My object is the provision of a reproducing stylus formed of boron, which stylus because of its hardness is capable of operating upon sound records formed from hard materials without wearing away .or otherwise deteriorating.
  • Crystallized boron is a substance which I have discovered to be well suited for the manufacture of reproduc ng styluses, since it is of an exceeding hardness, being very much harder, in fact, than sapphire. 1 have found that an exceedingly hard record material, such as that disclosed in applications of Aylsworth Serial Nos. 496,060, Plastic composition and process of manufacturing the same, filed May 1 1, 1909; 543,238, Phenolic condensation product and method ofpreparing same, filed February 11, 1910, and 543,236, Sound records and the same, filed February 11, 1910," wears away the usual sapphire stylus to a considerable extent.
  • Such a record material, or one of equivalent or great hardness, harder, for example, than celluloid, is of the utmost value for the production of a molded phonograph record, since with a record formed of such material, a reproducer of considerable weight or provided with a heavy floating weight may be used with a consequent considerable improvement in the volume and quahty of reproduction, if a stylus of suificient hardness to withstand the wear caused by the hardness of the record is used therewith. phire stylus is not appreciably worn when used in reproducing from such phonograph records, as are now on the market, of which those formed from celluloid are probably the hardest.
  • a sap- Boron is now formed in small crystals in. the electric furnace, which crystals 1 propose to utillze 1n the manufacture of styluses in a manner to be described.
  • boron has the advantages that it can be polished easier than diamond, and is not so fragile as the latter.
  • Fig. 6 similarly represents the process of lapping the crystal and holder to a cone shape
  • Fig. 7 similarly represents in plan view the process of rounding the end ofthe crystal
  • Fig. 8 is an enlarged sectional detail view showing the method of grinding the rounded surface upon the end, of the boron stylus.
  • Fig. 9 is a partial cross section through a reproducer provided with my improved boron stylus traveling in the record groove of a suitable sound record formed of hard material such as described above.
  • my improved stylus is formed from a crystal of boron such as indicated at 1.
  • a small boron crystal of irregular shape is secured within a holder 2 of brass or other relatively soft material by any suitable means as cement 3.
  • the rough lower edge of crystal 1 is then lapped to a fiat surface indicated at 4. in Fig. 2.
  • This operation is indicated diagrammatically in Fig. '5 in which the lap wheel 5 which rotates about the spindle 6 may be used for producing the plane surface f upon crystal 1.
  • the nest operation is grinding the sides of the crystal to a taper, resulting in the production of a conical surface 7 upon the lower end of the crystal 1 as indicated in Fig. 3.
  • This operation is indicated diagrammatically in Fig.
  • the crystal 1 secured in a holder 2 is chucked in a lathe having a rotating spindle 8 rotated from belt wheel 9.
  • the end surface A of crystal 1 is rounded and polished by means of the grinding tool 13 which is provided with a concave surface of the shape and size to which it is desired to round the end of the stylus.
  • the grind ing surface of the tool 13 may be charged with diamond dust mixed with oil, as indicated in Fig. 8 at 14. Either the stylus or the tool grinding the same should partake of an oscillatory movement during the rotation of the stylus.
  • the curve 17 should be of the prloper dimensions to travel within the exceedingly minute sound record groove, the conical surface 7 of the boron crystal preferably running smoothly into the curve 17 of the record engaging surface of the stylus. formed may now be removed from holder 2 and suitably secured in a stylus lever or otherwise mounted to, reproduce from a sound record.
  • Fig. 9 l[ have illustrated a stylus 1 connected by lever 18 pivoted at 19 to diaphragm 20 of reproducer 21.
  • the boron stylus may be secured directly in the stylus lever or it may be mounted within a suitable holder which is secured in the end of the stylus lever as shown.
  • the reproducer 21 illustrated is preferably of considerable weight as, for example, from 3to 5 ounces or more, which weight holds stylus 1 firmly in engagement with the record groove of record 22 which is preferably formed of the hard record material above referred to.
  • a stylus for talking machines formed of crystallized boron, substantially as described.
  • a stylus for talking machines formed of a substance containing crystallized boron, substantially as described.
  • a boron stylus having a conical end with rounded point adapted to travel in the groove of a sound record, substantially as described.
  • the stylus thus 5.
  • a boron Y stylus having irregular contour and a tapered end with a rounded point adapted to travel in the cove of a sound record, substantially as fascribed.

Landscapes

  • Polishing Bodies And Polishing Tools (AREA)

Description

T. A. EDISON.
PHONOGRAPH STYLUS.
APPLICATION FILED MAY 12, 1910.
1,041,983, 4 Patented Oct. 22, 1912.
- process for making unrcrnn s'rarns PATENT ornrcn THOMAS A. EDISON, 0F LLEWELLYN PARK, WESTORANGE, NEW JERSEY, ASSIGNOR TO IEOMAS A. EDISON, INCORPORATED, OF WEST ORANGE, NEW JERSEY, A COE- roaarron or new Jnrsnr.
EHONOGRAIPH-STYL'US.
Specification of Letters Patent.
Application filed May 12, 1910. Serial No. 560,787.
To all whom 'it may concern:
Be it known that l, THOMAS A. EDISON, a citizenof the United States, and a resident of Llewellyn Park, West Orange, Essex county, New Jersey, have invented a certain new and useful Phonograph-Stylus, of which the following is a description.
My invention relates to phonograph styluses.
My object is the provision of a reproducing stylus formed of boron, which stylus because of its hardness is capable of operating upon sound records formed from hard materials without wearing away .or otherwise deteriorating.
Crystallized boron is a substance which I have discovered to be well suited for the manufacture of reproduc ng styluses, since it is of an exceeding hardness, being very much harder, in fact, than sapphire. 1 have found that an exceedingly hard record material, such as that disclosed in applications of Aylsworth Serial Nos. 496,060, Plastic composition and process of manufacturing the same, filed May 1 1, 1909; 543,238, Phenolic condensation product and method ofpreparing same, filed February 11, 1910, and 543,236, Sound records and the same, filed February 11, 1910," wears away the usual sapphire stylus to a considerable extent. Such a record material, or one of equivalent or great hardness, harder, for example, than celluloid, is of the utmost value for the production of a molded phonograph record, since with a record formed of such material, a reproducer of considerable weight or provided with a heavy floating weight may be used with a consequent considerable improvement in the volume and quahty of reproduction, if a stylus of suificient hardness to withstand the wear caused by the hardness of the record is used therewith. phire stylus is not appreciably worn when used in reproducing from such phonograph records, as are now on the market, of which those formed from celluloid are probably the hardest. When, however, the record material is substantially harder than celluloid, a sapphire stylus quickly wears out, and accordingly, I have constructed a stylus of crystallized boron which is adapted to coact with such a record and to withstand the consequent wear.
A sap- Boron is now formed in small crystals in. the electric furnace, which crystals 1 propose to utillze 1n the manufacture of styluses in a manner to be described. In additionto its excessive hardness, boron has the advantages that it can be polished easier than diamond, and is not so fragile as the latter.
Reference is hereby made'to the accompanying drawings forming part of this specification and in which- Figures 1 to 4: inclusive represent side elevations, partly in section, of a holder of brass or other relatively soft material in the end of which a boron crystal is secured, Fig. 1 showing the roughcrystal thus secured, Fig. 2 showing the crystal and holder after the lower end thereof has been lapped to a plane surface, Fig. 3 representing the crystal and holder ground or lapped. to a taper, and Fig. 4. showing the same with the blunt end of the taper rounded. Fig. 5 represents diagrammatically in side elevation the process of lapping the flat end upon the crystal and holder. Fig. 6 similarly represents the process of lapping the crystal and holder to a cone shape, and Fig. 7 similarly represents in plan view the process of rounding the end ofthe crystal. Fig. 8 is an enlarged sectional detail view showing the method of grinding the rounded surface upon the end, of the boron stylus. Fig. 9 is a partial cross section through a reproducer provided with my improved boron stylus traveling in the record groove of a suitable sound record formed of hard material such as described above.
It will be understood that the process by which my improved stylus is formed may be carried out by various apparatus, and is not limited to the particular mechanism described.
Referring to the drawings, my improved stylus is formed from a crystal of boron such as indicated at 1. A small boron crystal of irregular shape is secured within a holder 2 of brass or other relatively soft material by any suitable means as cement 3. The rough lower edge of crystal 1 is then lapped to a fiat surface indicated at 4. in Fig. 2. This operation is indicated diagrammatically in Fig. '5 in which the lap wheel 5 which rotates about the spindle 6 may be used for producing the plane surface f upon crystal 1. The nest operation is grinding the sides of the crystal to a taper, resulting in the production of a conical surface 7 upon the lower end of the crystal 1 as indicated in Fig. 3. This operation is indicated diagrammatically in Fig. 6 in which the holder 2 in which the crystal 1 is secured is chucked in a lathe in which the spindle 8 is rotated by means of a belt passing over wheel 9 or by other power connection While the crystal 1 is being rotated, it, together with the adjacent end of the brass holder in which it is mounted, is ground at a suitable angle, preferably of approximately 30 degrees by means of the lap wheel 10 which is charged with diamond dust and mounted upon shaft 11 which may be adjusted at any suitable angle and rotated by any suitable means indicated diagrammatically by the belt wheel 12., If de sired, the two steps of the process so far described may be transposed, and the sides of the crystal adjacent to the end first ground to a taper and the rough end surface remaining then flattened. After the end portion of the crystal has been reduced sufficiently so that the blunt point of flat surface 4 is of sufficiently small area, the latter is rounded and polished by any suitable means, such as the ball polishing machine shown diagrammatically in Fig. 7.-
As here shown, the crystal 1 secured in a holder 2 is chucked in a lathe having a rotating spindle 8 rotated from belt wheel 9. The end surface A of crystal 1 is rounded and polished by means of the grinding tool 13 which is provided with a concave surface of the shape and size to which it is desired to round the end of the stylus. The grind ing surface of the tool 13 may be charged with diamond dust mixed with oil, as indicated in Fig. 8 at 14. Either the stylus or the tool grinding the same should partake of an oscillatory movement during the rotation of the stylus.
In the drawings I have illustrated the grinding tool 13 as suitably mounted in a spindle 15 which is revolved by means of belt wheel 16, the spindle and belt being mounted in a holder which is pivoted directly beneath the end of the stylus being rounded, so that during the grinding operation the spindle 15 may oscillate about the surface being ground, as indicated by the position of the spindle 15 shown in dotted lines in Fig. 7. The end of the stylus when rounded is shown in Fig. 4: at 17, the said figure illustrating the completed'stylus which is still secured within hlolder 2. The curve 17 should be of the prloper dimensions to travel within the exceedingly minute sound record groove, the conical surface 7 of the boron crystal preferably running smoothly into the curve 17 of the record engaging surface of the stylus. formed may now be removed from holder 2 and suitably secured in a stylus lever or otherwise mounted to, reproduce from a sound record.
in Fig. 9 l[ have illustrated a stylus 1 connected by lever 18 pivoted at 19 to diaphragm 20 of reproducer 21. The boron stylus may be secured directly in the stylus lever or it may be mounted within a suitable holder which is secured in the end of the stylus lever as shown. The reproducer 21 illustrated is preferably of considerable weight as, for example, from 3to 5 ounces or more, which weight holds stylus 1 firmly in engagement with the record groove of record 22 which is preferably formed of the hard record material above referred to.
Having now described my invention, what I claim and desire to protect by Letters Patent is as follows:
1. As a new article of manufacture, a stylus for talking machines formed of crystallized boron, substantially as described.
2. As a new article of manufacture, a stylus for talking machines formed of a substance containing crystallized boron, substantially as described.
3. As a new article of manufacture, a boron stylus having a conical end with rounded point adapted to travel in the groove of a sound record, substantially as described.
4:. As a new article of manufacture, a boron stylus having irregular contour and a lapped tapered end with rounded point adapted to travel in the groove of a sound record, substantially as described.
The stylus thus 5. As an article of manufacture, a boron Y stylus having irregular contour and a tapered end with a rounded point adapted to travel in the cove of a sound record, substantially as fascribed.
This specification signed and witnessed this 2d day of May 1910.
THOS. A. EDISON.
Witness es:
FRANK L. Drnu, DYER Samaria.
US56078710A 1910-05-12 1910-05-12 Phonograph-stylus. Expired - Lifetime US1041983A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US56078710A US1041983A (en) 1910-05-12 1910-05-12 Phonograph-stylus.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US56078710A US1041983A (en) 1910-05-12 1910-05-12 Phonograph-stylus.

Publications (1)

Publication Number Publication Date
US1041983A true US1041983A (en) 1912-10-22

Family

ID=3110257

Family Applications (1)

Application Number Title Priority Date Filing Date
US56078710A Expired - Lifetime US1041983A (en) 1910-05-12 1910-05-12 Phonograph-stylus.

Country Status (1)

Country Link
US (1) US1041983A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4330915A (en) * 1980-04-21 1982-05-25 Rca Corporation Technique for uniform stylus configuration
US4340954A (en) * 1980-08-04 1982-07-20 Rca Corporation Stylus tip fabrication from a synthetic diamond stone
US4388714A (en) * 1980-04-21 1983-06-14 Rca Corporation Technique for uniform stylus configuration

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4330915A (en) * 1980-04-21 1982-05-25 Rca Corporation Technique for uniform stylus configuration
US4388714A (en) * 1980-04-21 1983-06-14 Rca Corporation Technique for uniform stylus configuration
US4340954A (en) * 1980-08-04 1982-07-20 Rca Corporation Stylus tip fabrication from a synthetic diamond stone

Similar Documents

Publication Publication Date Title
US3943666A (en) Method and apparatus for burnishing flexible recording material
US1401830A (en) Method of grinding glass
WO2004058451A1 (en) Glass substrate for information recording medium and method for producing same
US1041983A (en) Phonograph-stylus.
US1110428A (en) Process of forming phonograph-styli.
CN106418939A (en) Processing method of buddha pendant
US1817094A (en) Production of phonograph styli
JP2012143852A (en) Apparatus for manufacturing glass disc
JP2005028542A (en) Visco-elastic polisher and polishing method using this polisher
US1651181A (en) Tool for treating ophthalmic lenses and process of making same
US1368745A (en) Method of making record-tablets
US1580567A (en) Sound record for talking machines
JPS5828645B2 (en) Disc structure for stylus resharpening
US1360511A (en) Device for repointing phonograph-needles
US2577149A (en) Corundum phonograph needle and sound reproducing apparatus embodying same
US831779A (en) Magnetic sound-record.
JP2015064920A (en) Manufacturing method of glass substrate for magnetic disk
JPH10217076A (en) Work method of disk substrate, work device and outer peripheral blade grinding wheel used in this work method
US3383752A (en) Method of preparing styluses for reproducing phonograph records
JPS58143449A (en) Manufacture of reproducing stylus for video disk and forming tool for form fine groove formation
JP2001246536A (en) Method of mirror-finishing edge of recording medium disc original plate
JP3368928B2 (en) Extrusion mold manufacturing method
US1256034A (en) Needle-sharpener.
JP2008310897A (en) Method for manufacturing substrate for magnetic recording medium
US1246651A (en) Record for talking-machines.