US2008328A - Phonograph - Google Patents

Description

July M, 1935 J. M. I UCARELLE ET AL 2,008,328

PHONOGRAFH Original Filed Aug. 15, 1924 INVENToRs Patented July 16, 1935 PHoNo GRAPH Original application. August 13,/ 1924,r Serial No'.`

7315795. Divided and ber 2,v 19281- SerialNo.- 30,1932" this application Novem- 316;,792; Renewed-211113,'`

This invention relates' generally'V tophonographs, and more particularlyA to dictating machines. Y "2 `Itis an object offithis'invention:to;facilitatej the operation and"improve the Vperformancey of didtating ,machines by providing means for* controllingrthe position of the stylus' ielative'tothek carriage under certain; operatingconditions;

Other, objects yand Yadvantages ofthis inven-` "tion .wil11appear hereinafter."

This i, applicaticin is, a division of the United States applicationiforLetters Patent Serial No.V 7311795; filed Augustfl', 1924; for. ,which Letters' Patent; 1,759,654,1dated MayZO; 1930,':was grantedi.-

,A-v preferred embodiment of the invention selectedjifor` purposes offillustration is disclosed imthe..accompanyingdrawing,,in which'T li'is` amperspecti've View ofthecarriage of'` atranscribing machine havingA this' invention app1ied.thereto., .Y l

Eig, 2is adetailperspective View to slightlyreduced scale of certain ofgthe parts `shown irrl'g;4 252" Eig.; SisalV side -elevation to Yreducedfscale tand partlyinlsectiom of thecarriage. shown in'Fig, 1; showing,A additional;p,a1't's. .,offthev dictating machine. l Y,

Eig.` 4 is fasectionaLviem on :the line 4`-4 of F'g.;` L 3g1with. parts broken away to4 more clearly disclose theconstruotion.. l 'l Referring rstf. toY Fi'g,. 31. of. the drawing, mcuntedneanthe right 4front corner '.oif the base 3 n. plate, (not-shown) of 'a. dictating ,machine vof the transcribingv typenis.A an upwardly` projectingfl standards, I; only;A the upper= portion .oiwhichA Vis showm, A., similar. standard', (not .shownl is mounted Eneartheleft front corner of.the.said i basa plate,. and.Y these1v two., standards support A neanltheir upper l ends, a guide rod .2 which ex-` tends, along the front lofy the.4 machine. These two` standards, Iare provided. below.- the;- guide .rodf 2 withi': suitable aligned, bearings Afor; rotatably, supporting-5anfeedscrevw 3 iwhieh-F extends'paralleli:

to-fthegude-'erod 2: Y n

Near @the .rearicornersn of r: the ai'oremention,edV baseV plate two :other standardsfigzt only fone fof Whichlfisfushown; support a' secondriguidefrodSv which-extends parallel to rthe-first fguidevroduY The -base'-plateiis-also-providd with'. suitableI means;^ (not shown) forfsupporting; a 'v rotatable mandrel il, which-is adapted to-carryacylindriea:calphonographi record." The"mandrel'il and,

"" the feed screw 3"are"a1-rangedto"berctated"byF suitablefdrivng means, Knot shown)y -such as an and-record 8; and whichy slidably engages' they other guide 'rodf 5;' The'carriageliis` adaptedlto? be `movedfalong4 the guide Vrods -1andtliel record?L supported on the mandrel lf-by' means-of-thef feed screw 3.- Thefeedfserew'@normallyis-engaged bya` feed nut' Sionl onelend of 'alever III*` `which-is fixed' on'apivot member-` II rotatablyf supportedbythecarriage 6i Figl 3fshows itlieA lever I0 and its pivot 'member I I `v turned inr at counter-clockwise directionA Ato disengage fthe feed nut 9 from the eedfscreW-S.`

Referring to'Figs.- l and 3, theupper'portion or head` ofthe carriage 6 i supports a` sound box- |25* for reproducing sound recorded `on the record '8;"

Thefsound box"` I2 comprises `a'diaphragm |35- lever- I 5l' The other-end of the-lever I 5 'carriesa--- stylus f I 6 for engaging the recordf 8"-'carrid y toward and away-from the mandrel f T, to accommodate for `records-of differentV thicknessesA and` for irregularities `inthe `record surface-,v the stylus lever VI 5 is` pivotally` mounted intermediate its diaphragmland the stylus leverpassesth'rough anopening infthebe1l1c'rank |85 The bell'fcrank The arml of th'ebell crank-Iwhicli carries/.the v Y ried bythe sound box I2." This arrangement'permits awlimited movement offthe-bell crankfendI relative Ato the vcarriage "61f`toward and away fromthe record surface and to the left and right'relative to-1th`e-record 'groovesw This armof 'thebell cra-nkfn'ormally is moved4 downwardly by gravity*` tomaintain-the sftyluslin contact with the grooves` of the'record Biregardless Aof-the outside diameter" of the record- To insure Ithis contact'4 between the stylus and-therecord the'bellcrankmay be-'h connected by means of a* tension spring-2| ytol a downwardly :projecting-ear lof fthe* memberZIlf sov` as to bias theV bell cranliV about its pivot I 9 1"in a* eounterclockwise; direction: This ilexible-stylus mounting permitsthe vstylus tofmoveinV a'- direction towardandirom the record Surfacev1 within the-limits imposed-by members22 and 23; where-i` endsupon `theffork I'Icarriedlbyrone armiof alim bell crank lever I8. The wire I4 connectingwhe 2 by the stylus may follow any irregularities in the record withoutinterrupting the connection Vbetween the stylus andthe diaphragm I3.

In addition to the above-described function, the horizontal pivot I9 of the bell-crank I8 permits the arm ofthe bell crank carrying the stylus lever to be raised from record engaging position. yOrdi-- narily, it is preferred not to lift the stylus and again drop it on the record surface, because this operation pits the surface of the record, and these pits will cause undesirable noises lduring arsubsequentreproduction of the speech on the'record. For this reason, itis the usual Ypracticeto leave the stylus in contact with the record surface during backspacing movements, the freedom of movement of the stylus toward and from the record surface permitting it to ride over the ridges between the grooves. However, if the carriage is to be moved any great distance along the record, or if a record is to be removed from the mandrel or anew record placed thereon, the stylus should be raised from its record-engaging position.

As may be seen in Figs.- 1 and 3, this step mayv be accomplished by turning the bell crank I8 about its pivot I9 in a clockwise direction. The downwardly projectingarm of the bell-crank I8 may be turned in a clockwise direction by the.

camming action of the rear end of Va release lever 24 when the latter is turned in a. counter-clockwise direction. The release lever 24 is mounted on the carriage 6 so as to `turn about the axis of the guide rod 2, and preferably this lever will be arranged sothat the operator Amay conveniently turn thel lever 24 in a counter-clockwise direction by raising its forwardly projecting end.

'When the release leverV 24 is rocked in a counter-clockwise direction the rear end of this lever also engages the upwardly projecting rear` end of the feedV nut lever I0.

This action rocks the latter leverin a counter-clockwise direction to disengage the feed nut 9 from the feed screw 3. Thus it is seen that by lifting Athe forward `end of the lever 24, the stylus is raised from the record surface, Vand the feed unit is lifted from the feed screw, and the carriage 6 is free to move along its guide rods A2 and 5. For a more complete description of the action of the release lever 24 referenceshould be made to Patent No. 1,759,654 'of-which this application is a division, as set forth hereinbefore.

vReferring to Figs. 2 and 3, the member 2B is provided with a pin 25 extending substantially at right angles to the pivot I9. TheA pivot pin 25 is supported in thecasing of4 the sound box I2. The pivot pin 25 permits turning movement of the member 26 relative to the carriage and across the record grooves, and consequently provides for ymovement of the-stylus I5 across the grooves.

This freedomof movement of the stylus Vis limited backward Yto repeat 4a.A portion ofthe recorded ldictation, and. backspacingl means are .usually provided for this purpose. Such backspacing movement preferably is effected by sliding the stylus back over the record without lifting the stylus from the record surface. The stylus should be freeto movetoward `and. from the record' surface kduring such Abackward .movement of the carriage so that the stylus can ride over the ridges between the record grooves.

However, it has been found that if freedom of movement of the stylus across the record grooves relative to the carriage is also permited during the backspacing movement, the stylus will not be backspaced the same distance as the car-f riage. The frictional resistance to movement of the stylus out of one groove and into the next groove is greater than the frictional resistance to the turning of the member 20 about its pivot pin 25. As a result, the stylus may not be moved backwardly at all until the carriage has moved Vsufficiently to cause the side wall of the stirrup 23 to engage the Vpin 22 on the end of the bellV crank I8.

In most instancesrthe operator wishes to back; n

space the stylus only a short distance perhapsto pick up the last Word or two after an interruption, or to make certain that a word Was correctly understood. If the carriage is backspaced only a. small distance, the stylus may not be moved at all relative to the record. This is particularly true if the stylus has lagged behind its normal posi-V tion relative to the carriage 4during the forward movement of the carriage. Consequently, it may be necessary for the operator to backspace the carriage a relatively great distance in order to move the stylus back to repeat only a few words. This operation requires repeated actuation of the backspacing mechanism, ethermanually or by known power-operated means, and may involve a considerable loss of time. l In most cases, upon the completion of the backspacing movement the stylus is left at or near one end of its range of Amovement relative to the stirrup, thereby im-v peding free tracking of the stylus when the carjA riag'e again moves forward. Y .To overcome these objectionable features this invention provides means for preventing' relative 4 movement across the record'grooves-between the stylus and the carriage movement. l Y n Referring to' Fig. 3, the carriage 6 may be during backspacing forwardly projecting end of a lever 26. lever'r26 is integrally connected to a collar 29 which is pivotally mounted on an extending cylindrical portion ofthe carriage 6 which su1- j rounds the guide rod 2. Thus it is seen that the Lever 26 carries on its upper portion a pawl`21. The pawl'ZI is pivotally mounted on the lever 26, and preferably is provided with yielding means,

5011i; backspaced along the record by depression of the w 'I'his .lever 26 turns aboutlthe axis of the guide'rod 2.

(not shown) normally to maintain the pawl in a forwardly projecting position. For a further disclosure ofthe backspacing mechanism, reference may be had to United States Letters Patent No. 1,030,740 to T. I-LMacdonald, June 25,' 1912.

When the forward end of the lever 26 is dedistance back along the guide rod 2.

rlateral movement.

iniafcounterwlockwisedirection, Thi'sturning o1'` thepivot member "I I also turns the lever I0 which is'xed-,to the vmember II,- todisengage theA feed nut95fromfthe .feedfserew 3beforefthe pawl Z'I engages` the rack `28 to movethe `carriage 6 backwardly vralong the. guide -rod*2.

nsmay beseeninlfigs'. ,land 3', theerear end" of'f thele'ver Ill, hen turnedfin a counter-clocki-v to the kactual backspacingmoveiie'nt of "the 'carria'g"8. 'heflever '33"is'jpivotally mounted intermediate" its`"end`s"on^the"carriage 6 at 34, and engagement of the rear end of the lever I0 and the spring member 32 cams the lever 33 in a clockwise direction. The other `end 35 of the lever 33 is bent so as to lie substantially parallel and adjacent to the diaphragm I3.

As the lever 33 is turned in a clockwise direction, the end 35 of the lever is forced upwardly toward the diaphragm I 3. This movement causes the end 35 to engage frictionally a curved arm 36 integrally connected to the member 20. The frictional engagement of 35 with the curved arm 36 is effective to prevent any turning of the member 20 about its pivot pin 25. Thus itis seen that movement of the stylus relative to the carriage is prevented during backward movement of the carriage,

The arrangement described operates to x the position of the stylus relative to the carriage prior to backspacing movement regardless of the relative positions of the stylus and carriage, and consequently the stylus will always be moved backwardly the same distance as the carriage.

It will be understood that the invention may be variously modified and embodied within the scope of the subjoined claims.

We claim:

1. In a dictating machine, a carriage; a stylus 'mounted on the carriage and having tracking freedom of movement relative to the carriage and along a grooved record-surface; means for backspacing the carriage; and means for causing the stylus to be backspaced an amount equal to the backspacing movement of the carriage, irrespective of its position with respect to the carriage before the backspacing operation has been started. Y

2. In a phonograph, the combination of a support for a record, sound reproducing means comprising a stylus mounted for movement to track the grooved surface of a record carried on the record support; means for shifting the stylus back toward the beginning of the record by causing the same to skid or glide over the surface of the record; and means for causing the stylus to occupy, upon the completion of the backspacing movement, substantially the same position relative to the sound reproducing means which it occupied before the back-spacing movement was started.

3. In combination, a carriage, a stylus carrier on the carriage capable of being selectively supported in a raised or a lowered position and mounted for lateral movement with respect to the carriage when in said lowered position, and means eiective for locking said carrier in any occupied position within the range of its said "n.lmeombination;a carriage, a styius 'carrier mythe-icarriage-capableffbeing selectively sus# screedl in a raised er e lowered positiond m med `fer -isterai -mcvement witn te tive v'for locking said canf'ierv in any vec cn'pfi'ed' position Awit-nin the range of its said Ia'terai' movement.

'5' combination, acarriage rhfovableln aear"pathy a stylus-carrier supporti mounted `carriage for pivotal movement insplanef on paralisi te the fpath et travel of said bardage,

and controllable means for `holding said ,sup'poit'l in any`v oc'eupied position within yits rangen-of movement in a plane in which said stylus is capable of functioning, a lever mounted on the carriage and capable of engaging the support in any of its positions within saidY plane to hold the support in any such position against such pivotal movement, and means to control the operation of said lever.

'7. In combination, a carriage, a stylus carrier support mounted on the carriage for pivotal movement in a plane in which said stylus is capable of functioning, a lever mounted on the carriage and capable of engaging the support in anyof its positions within said plane to hold the support in any such position against such pivotal movement, and resiliently co-operating means for causing the lever to be operative;

8. In combination, a carriage; a stylus-carrier support pivotally mounted on said carriage; a feed nut mounted on the carriage; a backspace device mounted on the carriage; means operated by the backspace device for moving the feed nut to inoperative position; an operable lever for holding the stylus-carrier Ysupport against pivotal movement; and a spring tensioned by the movement of the feed nut to inoperative position .for resiliently operating said lever into holding relationship with said stylus-carrier support.

9. In combination, a frame; a record-support; a sound-box carriage mounted on the frame for to and fro movement; a sound-box; a sound-box stylus mounted for `tracking movement relative to the record; means for backspacing the soundbox carriage while the stylus remains in engagement with the record-surface; and means operated as an incident to the operation 0f the backspacing means for positively holdingrsaid stylus in any occupied position during backspacing movement of the carriage.

10. In combination, a frame; a record-support; a sound-box carriage mounted for to and fro movement; al sound-box; a sound-box stylus mounted for tracking movement relative to the record; means for backspacing the carriage stepby-step a predetermined extent at each step while :the stylus remains in engagement with the record-surface; and means operated as an incii carriage.

11.` The combination in a device of the character described, of a sound-box, a stylus, a stylus carrier support pivotally mounted on the soundbox so as to have a limited range of lateral movement relative to said sound-box inwa plane in which said stylus is capable of functioning, and means for locking said support against such movement relative to the sound-box at any pointl along a grooved record-surface, means for back-- spacing the carriage, and means operatively associated with the backspacing means for causing the stylus to be always backspaced an amount equal tothe back-spacing movement of-the car-.

riage. A t 13. In combination, a carriage, a stylus, a stylus carrier mounted for lateral movement onthe carriage in a plane nylwhich said stylus is capable of functioning, and means for locking said aooeael carrier in any occupiedfposition in said plane against lateral movement relative tothe carriage.

14. In a phonograph, the combination of a support for arecord, sound-reproducing means comprising a stylus mounted'for a range offree'move#` ment relative to the sound-reproducingmeans in which to track a record; means for shifting said stylus upon the record by causing the same to skid or glide over the surface of the record; and means operated by the means for shifting the stylus for causing the stylus to occupy `upon completion of the shifting movement substantially the sameV position Within itsrrange of freerinove-4 ment, that itl occupiedbefore the shifting movement was started., Y v

*Y JOSEPH MnLUCARELLE. v

, VJOHN E. RENHOLDT.,

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