US1824847A - Automatic phonograph stop - Google Patents

Description

Sept. 29, 1931. E.. TRAUB AUTQMATIAC PHONOGRAPH sToP Filed April 14. 1928 INVENTOR Em'l Qfau WITNESSI Q.

ATTORNEY Patented Sept.Y 1931 Y l n i 1 .uw nmf'lzHQNOGMm f nylipiieetielknleenpnlf 14, 1928. fse'r'ialrnogarogloaj- 5 'd n M y I This invention .relates't'o'f bereleasedjronithe record-table underthev in devices for 1 automaticallyldontrolling the-actionrof the lever-'spring operation of. sound reproducingapparatus, ,'Operatively connected'lwith the? brakes such as phonographs andthe likelfll 1 lever lis ,a I1.,-,e1eotric'-current transmitting@k 5; The primary-'object ofthe inventionisto" swltchfmexnber,fpys'fhich acts to 4bridge they V552 provide :an improved friction-vbiakeadapted lspaced contactamembersof-aa switch'in an; to engage :the `circumferentialperiphery electric-circuit;whenthe brake-lever swlngs,l

of the rotatable record-table-ofjsoilnd-reintoxreleaseaposition.` .Thiselectric-circuit. producingA apparatus, -rwhich friction-.brake may employed for transmitting :current`v 1o may, bysimple connections be :releasedyfrom l to aflnotor designed ,to operatefthe sound-v $6-- recordftablebrakin'g position; at5fa.f- .prede.freproducingyapparatus, or yitemaybe ems.

Y termined time-under lthefcontrolling:action ployedfor an other` purpose such Ias the Y of an alarm-clockwhich may *beffof anylighting' of a; amp.` Iniits complete form," ordinary commercial t pelfwuv z the;` pres'nt v-improvement also includesadf" A further `object o thisinvention-isz-to` justablemeans for automatically.swingiI1g..-esiE provide a ,friction-brake.,ofeeths :'characterf thewbrake-'lever into osition t0 arresto-the-y by means'offfwhich th@braking;i;im-,isinp` rotation of the recor -table by the inward-.- creased by any rotation tendencyyoffthe niovem'entfof the :tOne-arm'of; theapparatus record-table. 7 v ai 1;duringorat.thecompletion .of `thevplaying;

201 A still furthenobjeet .of this 'invention is f ofa recordu'pon'the record-table. 1 Y to providemeans whereby the,"automatic-ref` 11n; the accompanying ,drawings,` Fig. y1 leaseeof the friction-brake ycal'lsesltheclosin I is` altop-planview of a .portion of a `sound-Vv of anielectric-.circuit which-may beernployeo-r reproduclng:apparatuS.to which the present as a power factor'in;the.ope-rationzof the improvement. has: been-applied, thelrecord-A 25.sound-reproducing:apparatus or `forlighting table being :partlybroken away `adjacent 75"` a lamp, etc. Y 1 a f j in: thelibrakeslever' andthesWitCh-boxnframei: `Other objects ofthe-inventionxwillbeap: bei-ng Vshown'in section. "@Fig; 2 is an: enparent kfrom 'the followingwdesoripti and f largedv front-end elevation, partly in section; claims. l l of theupperportionfof the apparatus, omit-Vl 30. In a preferredembodiment: of fthe inventing the tonefarm. Figz is a side-elevation 8a tion, a friction-element carrying ffle've'rhas ofi the brake-leverand latch-arm .-asmount? its fulcrum `Within the circumferenceioi the"V edv upon the supporting-platetherefor. record-table andarearward ofha'record-table@ 4E is "a. rdetached:perspective ,'view"'of'the radius through the point ofengagement` of brakeslever."supporting-plate. Fig..'5 isv a` the friction-elnentzWithfthe.cironmferenfk side viewfof thev switehwiththe boicfthere-a 8'5` y talip'erphery .0f saidl tabla-whereby any. forfshownin' section. rotationftendencyin.thelproper direction'oii Thepresent improvement is applicable to v the record tableghas the effect of increasing any'o' the well-r known makes of sound-V the brakingaction by Said. level'. u reproducing' apparats and. any v ordinary? 40 Pivotally carried bythe brakeleverto alarm-clock#mayv be employedH to control 90 swing about an axis transverse to.theaxis .vtherelealseofthebrake. f OfSad leVeI'S all'armwhhmyfbltched :Referring'to the drawings,-the presentv 00 110161 the'brake-lever in reeordjtable en-f improvement 'isa illustratedas applied --to a* gaging `positlon 'against--thevactin Ofeza sound'-reproducin'g apparatus" including a y spring.` The pivotal'latch-arm.isonnected frame'f'orgcdsig. phavinggnear its upperl 951 by means `of a*leX1blefelement,1-such as a end'fa"casing-table 2. Spaced above and' 00rd, Wlth the .alarm 'wlnding-stem'of:`V auf parallel"tdthe-casing-table 2 is -a record-f alarm-clock whereby.'theplatchfarmmay bel fableif); whih-gm'ay befsupported and oper-I eaused to be"automatieally'trippedta.pref atedin any vusual mannenVA the present. in-v determined time to permit vthe brakej-l'evexgip. y'entionvbeig Aequally;'applicable '-toffelc-; 10o

` 29. the plane of the recorc1- table5' -Therbralie` 1ever,'which1in the resent insta-nceis maden llablank, inlay: .1 be .r of anyfa suitable construction. and: 2 betweenits,t ends` Vxeclly carriesal friction-element 13 innpost v 25 tion to' engage the `circurnferential periphery i Vdriven apparatus.

trically and mechanically operated motor- Capable of travelling across the record-table is the usual soundbox 4, carried by the free end of a tone-arm 5 swinging inwardly toward the axis of rotation of the record-table during the sound-reproducing process.

ot-screw 6 is a supporting-:plate 7 provided with an arcuate slot 8 entered"by*ase'clrir'xg- A screw 9, this construction providing. @rad-. justment of the supporting-plate'7"to'chan" e its angular position with respectto 1 -recon A- table radius. The supporting-plate 7 is provided with aithraded'aprture -10 entered-A by a pivot-screw ll constituting the fuloruil'l 1'.

of af brake-lever lwcapable o f swinging about its pivotal| axis'jinV a .plane 'parallel- .to

from ka sheetlmeta ment Aof the freer-mdy of the brake-leverdQ the record-table, which Idirection isindieated i by the arrow inFig, l oftliedrawngs, the

pivotal? axis 'of the brake-lever1'l2 is'ireardirection'. has `the' effect i of increasing the braking .actionv I"of the friction-element# Wear-01E the frictionselement Emay" befieadlyf taken up vby ythe before` "describedV adjust l ment of the supportinglplater. --The swi ing movement ofthe brake-leverinfy the -d1''..

rection to:` engage "-thefrcordtable isi pref-- era'blyl `limited by-fa vv'stop-eari141 'upturnedi from the f. supporting-plate- 7, said-,'-stop-.alfc beingy slightly spacedftrom the bralrelevr:v

in a normal braking positionofrsaid'lever v .i `Projecting upwardly from the .brakeer l2 is ua Vthumbpiece lfor manually swings.;

ing the levern into brakingk ositiornl ag`fai11st-` theA actionv of v a spring 16,' secured: 'upon the.:

plate 7 and yieldingly bariiig' against the;

lever to release it.: from brakingf pos whereby the brake-levermay be releasably latched in braking position.

Suitably connected with the free end of the latch-arm, through the intermediary of a coil-spring 19 is one end of a flexibleelement or cord 20 of which the opposite endisloonnected to a crank 21; afforded by Secured" -uponthe-easingtable 2 funden'k neath the record-table 3, by means ofa plv-k the aalarrn-Winding stem of l an alarm-clock 22. In the present instance, the alarm-clock Secured uponthecasing-table 2, for adi! justment: inthe direetiox'n:ofA the brake-lever is an insulator blockx2'5adjustably carrying spaced oontaetJmemberS, `asv .26, @the inner@ ends, as'l 27,;f .Whichrarefupturned and are*v inclinedx -withzfrespet toi-eachother. By suitablev y-brindingeposts,v these.- contact-inemf bersV areconnected-l with zcurrentleads, as 28,

of .2 an ,electric-circuit which may... constitute inggapparatusworimayf bey employed for any. otherldesired purpose, .Suitably connected 29; and an2fntermediat'a` insulatinglink 30 is a shiftable switchI-merilberil-o-currentf conducting materiali At its end nearest the fixed: contact`members; i. the'v switch-member.

. .'"31fi's termed-rasa;.Veshaped'bifidge 32 adapt- Considered' in lthe' directioni of 'rotation off 1 edto'isimultaneously engage.` the Vupturned ends 27 of said fixed contact-members, when 'the brakelleyerlfis vvs wu.1 1gaway from the l A recordftable': The gswitclr-member '31 is wai-dof a radiusfthrough the point 'of eni gagementof the1'friction-element-v withA the` re'cord-tablev andi-therefore. any rotation L tendenqyo'the recordtab'le in its p'roper` sho-waas guided by spacedY pin`s,`as 33, fixed upon the insulator-block Qfwhich ispreferably covered'bya cap-plate v '.In'ord'er to automatically swing the brakelever l2 into position to restrain the recordtable vv-vagainst :rotation-said brake-lever is connected'by-a cord Y'B5-o1' thelikef with the free end of an arm 36 secured upon thev lower. endX of 'an oscillatory, verti'cally-apertured block 37,161Fixed upon the casing.' table 2': adjacent the rear end fof the tone-arm 5 isla post .38 'upon whielx:tlieblocl` 37 oscillates, said;r blocky carrying r at its upper` end another 'arm '39.: i j Threaded-liuto the arm 89 is an adjustablevscrew .4Q provided with a buifer`-disk il :of suitableniaterial and posi tioned :tiche-engaged by the'tonesarm as the latter swingslinwardly vin the usual manner. operationfof? thej present deviceis so simplefthat t'i willybe. clearly understood freinsthe foregoing descriptiomj Suffice it tol mention that the brake-leveris held in record-table engaging 'positionby the latcharm 17 and'-llatclrll8ftores`ti-ain `said recordtable against -rjotaltion'i ffoperatedv by 'a mechanicalmotor y'and `tomaintain an open circuit if .'o eratedibylanelectric-inotor con necteci wit \-t:hedescribed'-fswit'ehvBy setting. aInrrh.-e1ock.:.swrautomatically trip witlthefbrkelevers :12 by. means of a link.. in one direef'fion.v The brakgfs'urface :eff the friction-element? is preferably".disposedfk tangential to the record-table at the time-ofi engagement of the. friction-elementi therethe latch-arm at a predetermined time, the spring 16 acts to release the brake-lever12 from engagement with the record-table and thereby shifts the switch-memberl in' a direction to cause its V-shaped end to bridge the spaced contact-members 27 and close the electric-circuit. The record-table beingnow free to rotate, the tone-armf` swings inwardly during the playing of a record and engages the buffer-disk 41 to swing, through the described connections,` the brake-lever into record-table engaging position.

Having thus set forth the nature of the invention, what Iclaim herein is: Y

1. In a sound-reproducing apparatus having a rotatable record-table, a swinging brake-lever having its pivotal axis within the circumference kof vsaid record-table, a friction-element carried by the brake-lever positioned to engage and release the circumferential periphery of said table in swinging movements of the brake-lever in opposite directions, means acting to shift said brakelever from braking to release positions and means for releasably'latching said V brakelever in braking position. Y

2. In a sound-reproducing apparatus having a rotatable record-table, a swinging brake-lever having itsv pivotal axis within the circumference of said record-table, a friction-element carried by the brake-lever positioned to engage and release the circumferential periphery of said table in swinging movements of the brake-lever in opposite directions, means acting automatically upon operation of the sound-reproducing apparatus for swinging said lever from release to braking positions, and ymeans for releasably latching said brake-lever in braking position.

3. In a sound-reproducing` apparatus having `a rotatable record-table, a brakelever, a pivotal support for said lever, a latch-arm pivotally supported by said lever,

i a friction-element carried by the brake-lever between its pivotal supportand said latcharm in position to engage and release the periphery of said record-table upon swinging movements of lthe brake-lever in opposite directions, a stop-element for holding said' latch-arm in record-table braking position of the brake-lever, and means' for automatically swinging said brake-lever from braking to release positions upon release of said latch-arm.

4. In a sound-reproducingy apparatus having a rotatable record-table and a swinging tone-arm, a brake-lever, a pivotal support for said lever, a latch-arm pivotally supported by said lever, a friction-element carried by the brake-lever. between its pivotal support and said latch-arm in position to engage and release the periphery of said record-table upon swlnglng movementsV of the brake-lever in opposite directions, a

otal axis of the lever, .a friction-element carried by the brake-lever in position to engage and release the periphery of ,said record-table upon swinging movements of the brake-lever in opposite directions, means for` latching said arm to hold said lever in record-table braking position, and a spring acting to swing said lever from braking to release positions upon release of said latch-arm.

6..In a sound-reproducing apparatus having a rotatable record-table, a frictionbrake member capable of being shifted to engage and release said record-table, spaced contact-members of an electric-circuit controlling switch, a spring acting to shift said friction-brake member from record-table engaging position, and means for bridging said spaced contact-members to close the electric-circuit upon shifting of said friction-brake member under the action of said spring to release the record-table.

7. In a sound-reproducing apparatus having a rotatable record-table and a swinging rtone-arm, a friction-brake member capable of beingr shifted to engage and release said record-table, spaced contact-members of an electric-circuit controlling switch, a spring acting to shift said friction-brake member from record-table engaging position, means for bridging said spaced contact-members to close the electric-circuit upon shifting of said friction-brake member under the action of .said spring to release the recordtable, and means rendered effective by in-v ward movement of said tone-arm for shifting said friction-brake member to engage said record-table and open said electriccircuit.

In testimony whereof, I have signed my name to this specification.

- v EMIL TRAUB.

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