US842028A - Sound-recording and reproducing mechanism. - Google Patents

Description

I No.842,028. PATENTED JAN. 22, 1907 E. P. SHUB.

- SOUND RECORDING AND'RBPRODUGING MECHANISM.

- APPLICATION FILED SEPT. 18, 1905.

' which a flatdisk isemployed'for receiving a 'diaphraginfor a sullici'ent d'istance to pre- To all whom it n'my conceive rsafrhs PM I NT EFICE.

EDWARD-F." s nus, or WASHINGTON, nis'r uc'r oFcoLu eiA.

iLSOUND-RECQRDING AND REPRODUGiNG MECHANISM.

Specification of Letters Patent.

Patented than. 22, 1907.

Applicaticii filed September 18, 1305. Serial No. 278,968.

'1 3e itknown that. I, ED ARD F. Seen, a citizen of" the -Unitedl States, residing at 1Wiishi1igton, District of (Lolumbia, have in.-

ventedfnew and useful I'm irovemcnts ll].

r o .v i J bound Record ngand Repro ucing Mecham,

"isms; of whichwhe "following is a specification. v

"This invention relates to talking; ma- 011111168, more particularly to that type in record in the form ofa laterally wavy spiral groove of uniform depth cutinto the disk by a stvlus operated, by a vibrating diaphragm.- The oblejctoftheinventiou [to improve the reproduction of recorded soundfbyproviding'suitable means of simpl construction attached to the diaphragm of a e and positive talking-fmlachinewhich wit l cause the recording or'trans'cr bing stylus to travel in a direc- "tion at a right anglc to the vibratory movement ofthe diaphragm and with a shorter l -amplitude of"vihration. [With this construction is combil'icd' a straight, uninterrupted passage 'for the sound-haves from the italking nachine with my invention applied thereto. Fig. Q'isa plan View of the same. Fig.3 is a front'view of cording'and reproducing mechanism on enview ci a detail of the intention.

Fig. 41s a sidefview of the.

5 is a plan Fig. 6 is a sectional View on the line (1/0. oflFigi .4.

the sound-box and restantially in the planeof the diaphragm 7 is 'ournaled a vertical pivot or shaft 14, preterably contained within a casing] The ends ofsaid pivot are pointed and rest in sockets formed in the ends of adjustingscrews 16,.

passing through the top and-bottom of. the casing 15. In place of the casing lugs may project from the side 01 the sound-box to receive'the screws. Secured to, the Vertical pivot His a stylus-]e*ver 25, one arm 17 extending horizontally in front of the diaphragm 7 and-attached thereto at its center and so shaped that it Will\ pass around-the edge of the sound-box without touching it. A SGCUIldl or stylus arm 18 projects downwardly and forwardly at an angle to said pivot/in the direction ofrotatich of the record-disk and forms a right angle with the arm 17 when seen in plan- The stylus-arm 18 carriesa styl us 19, adjustable within said arm 18 and secured thereto by a-thumbscrew 20. The stylus-arm 18 and stylus 19 are in the same vertical plane as the pivot 14, but n tan angle thereto, as clearly illustrated in Figs'l and 4. A's'thus arranged the stylus 19 as it follows the wavy groove in the invention furtl'ier consists in the con- 5 combination; and arrangement of parts, such as will be fully described herein 3 after and pointed out in the 'cl record-disk oscillates the vertical pivot14 in a horizontal directi0n, which in turn vibrates the horizontal arm 17 and the diaphragm 7., to whichsaid arm is attached.

It is to be observed that the oint of attachment of the arm 17 to the diaphragm is I at a'gre'ater' distance from the axis of the pivot- 14 than is the point of the stylus 19.

This is important from the fact that-When 1 extend" d an anismtor rotating; recc'rdfdislg 2. I recording and reproducing mechanism is indicatedat 3, attached to thejhorn t or other normal position, -a flat sprmg 22, secured to sbuhdieceiver by means of a hall-j oint 5.

The i The recording and reproducing mechanj ism 3ccmpjrises a sound b'ox Got the usual cylindrical form ;"carrying a 'Vihratory dia- I phragm 7 and a' n from the rear 10f thefsound-bo'x in a straight line andbpening thereinto behind the dia- Ph m On'one side of the sound-box 6 and subtube 8 projecting central ly theiuachine is making a record the am litude ofvibrationof the stylus point is ess than. that of the: diaphragm, from Whiph it followsv that [when the record. is reproduced the stylus; has ajshorter' distance to travel thenwould'be the case if the arms 17" and 18 equal distancefrom their axis. By this construction a better and purer tone is produced and the life'of the record-disk is increased.

'To restrain the amplitude of vibration of the stylus. 19 and re'turn the diaphragm 7 to other soundere'ceiver an adapted; to slide or fit 'over'or within the tube 8; has secured to it one of the elements of the ball joint 5, the

other PlOI'HUH'l. it) hising attached to thesnmll nd ol the horn 4. The inner eltunent It) on tho slvovo 8'! consists ol a. thin splusro,

pi lvriihly ol liltiill, mounted on tho and of said slorvo whit-h [mSHs entirely through tho Silllflt, us indivutozl. in Fl 4', This outer t (-nuent H) is ol luunisplu-rioal form, with, projw-ting hugs il slightly thicker than this rest oi the (airmen! on ranch side and a sortkot or out-away portion 1! on tho top. Fig. rnngrd that vviu n assembled thov do not con tau-t oxorpt Ill. tho pivotod points and run ho wavy groove on the record-disk when repro- (liming sound and when inscrihing a record to lorm ii groove rxiiotiy in harn'iony with tho vibrating diaphragm. The find of the horn at its attachment tothe element .10- is slightly iurgrr than tho and of sleme 5-) 450 (Her: 'llnrlmi'u-nts 1!? and it)" are so m tors.

Having thus described my invention, I

or of tho disk it wiil describe an :i-rr (sou dotted lino, Fig. 2) passing through tluaxis of the record-(11s 2. It is to ho ohsvrvod that the stylus does not lie in tho axis ol' thr sound-box, but outsidv thereof, v wlzith zirrzingt-nuent tends to draw the rorordin; andreproducing dvvim: toward thr mentor of too rvrord-disk as tho luttor rotates.

From (hr ronstrurwtion iiiiovo drsnrihrd it will ho notvd that it straight unohstructvd pnssugo-wny for the sound-waves produrvri, trot lroin nurvvs and other impodiinonts vxhirh tend to-hreuk up and nudili: tho sound produced h the vibrating diaphragm. 'liu: joint 5 as lor'nrzl purniirs'tlustylus to mow: \vil ll grout i'roodoin in a vertical dirorclion, hut holds it lirinly against any side play,

sotlmt it ist-oinpr-llrd to :urrurutr-lv lollowtiw permit the sound-wows to on without obstruction.

'ilu: stylus i!) may he readily removed from the rr-oord-disk by swinging the recording and ro n-oducing nieohanisn'i 3 in an upward direction on tho joint 5, where it heid h tnie sookrt 1 1, into whit'h tho sleeve 9 entor the hairn oluini l. in it sound recording and reproducing HHPlIZLHiSlH, it sound-hox, a Vertically-tliw :osod diaphragm tnotlntif-ii therein, astylusl(\'('l' pivotzilly inountrd upon saidsonnd-hox and having its :ivotal axis in the samgplane its limit oi" the i'l iuphriigm, one arm of said levrr ('UIH'HN'iOIl to said diaphragm and the other or stylus :1 'moi said lever projecting downwardly at an :iuiite angie to thozixis of said pivot and having: its r220 find nearer to said pivotal axis than the free and of this lirst-nmntiorwd arm of said lover.

'2. in a sound recording and roproduriing inrolmnisin, u sound-box, o. vibratory diaphragm thorvin, a vertical pivot lying in the plznm of said diiipl'iragm, a styluslever mounted on said pivot, one arm of which levar is attached to the diiiplnugm, the other and shortor armmrrying a stylus, and a cen- Hiring-spring attachud at one mid to said sounrhhox and hearing at its other and against a flattened portion on the pivot.

,ln testimony whereof I tiiiiifi my signature in prcsrnoo of two subscribing witnesses.

- EIHYARD SilUl}. Witn A'SI Hunt )3. STERLING, if. (.I Brumsrt.

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