US915936A - Reproducing-stylus for talking-machines. - Google Patents

Description

G. K. CHENEY.

BEPBODUGING STYLUS FOB, TALKING MAQHINES. APPLICATION FILED JUNE'G, 1903.

91 5,936 7 Patented Mar. 23, 1909.

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- w INVENTOR /B ATTORNEY UNITED sT r s PATENT o roE;

GEORGE K. CHENEY, OF NEW YORK,

N. Y., Assicnoannmsmi assrenmun'rs, ro vision TALKING MACHINE COMTEANY, A companion QENEW JERSEY.

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machines arid consists more specifically of an improved form of reproducer adapted for 1 use in connection with the sound record described and claimed in my co-pending application Serial No. 160,431 filed June 6, 1903.'

The record referred to is preferably of the disk type having a spiral groove cut or otherwise formed in its face and the record in the form of a connected series of indentations contained on the thread -or that portion of the surface of the diskremaining between the turns of the spiral groove. v The reproducer point is preferably of suit able form to engage both the record thread and'the groove on oneor both sides thereof, it being thereby guided and'maintained in proper relation to the record, also fed across the. disk as the latteris rotated.

By reducing the bearing. surface of the reproducer to; the extreme point of the stylus and formingv the spiral guide groove with perfectly smooth walls, unpleasant sounds,

such as harsh, shrill tones emigrating noises,

may be either entirely avoided, or so greatlyreduced as to be rendered unnoticeable.

The preferred form of reproducer embodyingmy invention, is illustrated in the accompanymg drawm s, throughout the several -view t ereof.

views of which 'ke. characters of reference indicate corresponding arts.

- In these drawings: perspective on" a greatly enlarged scale, showing a portion of a disk sound record and the re roduc'er point or stylus in operative relatlon thereto. ,Fig, 2 is a vertical sectional view taken centrall .of the record thread, on the lines, .9 of Flg. 1.. Fig. 3 is. a detail view in erspective of the repro 4 is a vertical sectional ducer oint, and 1 g.

Referring now to the drawings, -1, indicates the sound record, which may be of the vdisk or cylinder type. A spiral groove 2, is

formed in the face of the disk 0! cylinder the record the form of a connected Specification of Letters fatent. Application filed June e, 1903. Serial no. 180,429;

igure 1 is a view in Patented March as, 1900:

. series or succession of indentations 3, is con-- tained on that portion, 4, of the disk or cylinder surface remaining between the. turns of the spiral groove. v

The reproducer oint or stylus 5, may be made of any suita )le material, such as steel orthe like, but owing to the necessity for frequently renewing the same, when made of metal, I prefer to use sapphire or similar stone, which may be used repeatedly Without showin appreciable wear.

constructed, t e stylus stra dles the record strip, as shown in Fig. 1, and while free to move up and down in following the indentations of the record, its lateralplay is limited.-

operate with the horizontally disposed surface of the rotating record disk, or it may be inclined either toward the rightvor left, as indicated by dotted lines in Fig. 2. k In use, it will be seen that as the the g'rooveare perfriztly smooth, the surface thereof in passing in contact with one or. the

character and as the distance separating, these lugs may exceed'somewhat the width of the-record strip, contact between the surface of the groove and the lugs will only occur at intervals The stylus will/therefore have a' bearing normally on the record thread only at its extreme p0int,'and in consequence, the objectionable scratching or grating noises will be to a great extent overcome.

phonetically connected with t and feed automatically, it is providedwitli a bearing-surface, such lugs being adapted to ereof in any well known or The hearing surface 6, of the stylus, is

i The recorder may be set vertically to co- 1 walls of these lugs are referably em loyed and thusother of the guide lugs on the stylus, will not produce noticeable sounds of an unpleasant The stylus or reproducing point may be mounted in operative relation with a suitable do not wish to he understood as limiting 119- undulations upon their tops or edges.

myself to the exact details of construction .shown and. described, as various changes "m ght be made without departing from the "SPIIIt and scope of my invention.

For example, the bearing surface of the stylus might be given more or less curvature to con form to a record strip having a rounded surface. My improved stylus may also be used in connection with a record thre..d having lateral undulations as well as those having All such modifications, however, I consider obvious and immaterial variations of form and not of substance and still within the nieaning of the present invention.

Having, therefore, described my invention, I claim:

1. As an article of manufacture, a reproducing stylus for talking machines having a pair of longitudinal extensions, theinncr sides of which are adapted to form guides for said stylus and having a portion located between said extensions adapted to guide and retain said stylus in position longitudinally and to contact for substantially its whole length with the active surface of the record.

2. As an article of manufacture, a reproducing stylus for talking machines having a pair of longitudinal extensions, the sides of which are adapted to form guides for said stylus and a portion located between said extensions adapted to contact for substantially its whole length with the active surface of the sound record.

3. As an article of manufacture, a repro du'cing stylus having a pair of longitudinal extensions, the inner sides of which are adapted to form guides for said stylus and having an edge located between said extensions to contact. for substantially its whole length with the top of an undulatory record thread.

4.'As a new article of manufacture, a reproducing stylus for talking machines notched to straddle the record thread and havmg a strai ht edge engaging for substantlally its who e length the active surface of the record, lateral pla of the stylus being 7 limited by the side wa s of the notch.

5. As a new article i of manufacture, a reproducmg stylus for talking machines, said stylus bem notched to straddle the record thread e151 havin "a straight edge of approxnnately V.-shape cross section enan article i of I manufacture, a flattened rerproduclng stylus one end of which is provide with a transverse notch, the bottom edge of said notch being sharpened to form a wedge-sha ed ortion to contact for substantially its w ole ength with the active surface of the record, the portions of said A stylus.

.surface of the record, and havin stylus adjacent either side of said wedgesha ed portion forming guides to feed the sty us across the record.

7. As an article of manufacture, a fiattened reproducing stylus provided with a substantlally rectangular notch in the end thereof, the bottom of said notchx'being sharpened to form a wedge-shaped portion to contact for substantially its whole length. with the active surface of the record, the portions on either side of said wed e-shaped portion forming guides to feed the stylus across the record.

8. A reproducing stylus having its engaging extremity beveled down to a straight edge, the said beveled portion being situated between a pair of adjacent surfaces project' ing beyond said edge.

9. A reproducing stylus havin the middle portion of its engaging end beve ed down to a straight edge and its side portions projecting beyond said edge.

10. A stylus having a portion provided with a straight edge adapted L-o en 'agetho undulatory surface of the record an s aced projections for limiting the lateral p ay of the stylus.

11. A reproducing stylus having a portion provided with a straight edge, and a ortion projecting beyond said edge to gui e said 12. A reproducing stylus having a portion rovided with an edge ada ted to contact for substantially its full lengt with the active s aced projections for limiting the latera p ay of the stylus upon said surface.

'13. A reproducing stylus having a straight edge to enga e the undulatory surface of the record, and liaving means for limiting the lateral lay of said stylus.

14. g reproducing stylus having a substantially straight edge extending substantially at ri ht angles to the longitudinal axis of said sty us, and having a ortion extending longitudinally of said sty us beyond said edge to guide said stylus.

15. A reproducing stylus having an edge adapted to contact with the active surface of the record, and having s aced projections for limiting the lateral p ay of the stylus upon said surface.

16. The combination with a stylus of s aced projections for limiting the lateral p ay of the stylus.

June, 1903.

' GEORGE K. CHENEY.

Witnessesz J. E. Pnnnsor,

W. H. PUMPHREY.

Signed at New York, Y. this 4th day of v

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