US1471146A - Phonograph stop mechanism - Google Patents

Description

- w. w. DEAN PHONOGRAPH STOP MECHANISM Filed April 15. 1922 s Sheets-Sheet 1 HIS ATTORNEYS Oct. 16, 1923.

' w. w. DEAN PHQNOGRAPH STOP MECHANISM 3 Sheets-Sheet 2 Filed April-15, 1922 INVEN TOR.

' WILLIAM W. DEAN H\S ATTORNEYS ,Oct. 16 1923.

W. W. DEAN PHONOGRAPH STOP MECHANISM Filed April 15 1922 3 Sheets-Sheet 5 WILUAM W. DEAN INVENTOR.

ms ATTORNEYS To all whom may concern 'Pete ntedGct, 16, 1923.

iresfr time.

res a rier eerie s; p

ILLIAM w. been, or LOWELL, MASSACHUSETTS, assrenon'ro THE nsrloinnor ELECTRIC COBFORA'IIOIL'OF NEW YORK, N. Y'.,.A CORPDRATION OF NEW YORK.

rnonoeanrrr s'ror mnonnnrsia.

I A lic tion filed April 15,

Be it known that I, l/VILLIAM W; DEAN, a citizen of the United States, residing at Lowell, in the county of Middlesex and State of Massachusetts, have'invented cer ain new and useful Improvements in Phonograph Stop Mechanisms, of which thefollowingis a full, clear, concise, and exact description, such will enable others skilled in the art to which my invention appertains to make and use the same. p Z

' a ly invention relates to phonograph stop mechanisms, and particularlyto such stop p auisni operable under the controlot the said mechanisms as are known in this art as preset phonograph stoprnechanisnis I It is an object of the present invention to proyide a mechanism having an element adapted to be adjusted'prior to the playing of a phonograph record to a particular position in the path of the advancing tone arm, and which element comprises an electrical switch controlling member, such 'element having a handle portion projecting above the horizontal plane otthe tone" arnnand whlch'jhandle portion'ma y be grasped by the operator of thephonograph as for the purpose of adjustment. 7

Another object of my invention'is to pro vide such an elementas above referred to which is entirely sel'f contained, and which comprises an electrical switch and a switch i operating lever, same being enclosed in the 7 body of the stop element, and which switch is protected from dust and moisture which otherwise might interfere withthe proper working of the switch contacts. V

Anotherobject of my invention is to proride such a stopelement containing an eleca trical stopping switch, and in which the switch contacts are capable of ready access as for repair or adjustment, and which may be inexpensively manufactured and easily assembled, and which may be so made as to be presentable in appearance as well as efficient in operation when used.

Another object of my invention is toprovide such a stop element as'may be mounted on the upper face of the phonograph driving mechanism enclosing casing "of the well I phonographs employing disc-records. j {j 1 j i Another object of myinvention is toprovide'an electrically controlled automatically operated phonographfstopping mechanism comprising an actuating electromagnet mal stopping position under the control oi plate removed so as to ,trically controlled electroma.

1922'. Seria 1No .5 5 2,98 6.

adaptedl'to operate under the control ofth'e said switch, when the said switchis operated V at the termination of'a record which has been played. v p

Another object of my invention-isto provide such an electricallyoperated stop mech anisin which, with its enclosing. casting, is

so thin that it may be placednnder the I phonograph turn table on'the board comprising av wall ofthe motor enclosing cabinet. V

Another object of my invention is to provide such anelectrically opera-tedstop mechswitch, and which comprises a second'switch,

contacts when the operatorinoves the phonoi-ng lever isautoniatically restoredto norgraph motor starting lever, and which startthe said first switch, and the said electromagnet. q I

Other objects of my invention and the invention itself willbe' more apparent as the description of the embodiment thereof,

herein illustrated and described,-progresses,

- and which embodirnentis shown in the accompanying drawings forming a part of this specification; and in which drawings Fig. l shows'a top planview of aphonograph mechanism emliiodying my invention. Fig. 2 shows a sideelevational View of the supporting board, and phono raph elements together with the was secured to the under side of the supporting board of such a phonograph mechanism as illustrated in Fig. 1.

Fig. 3 shows a side elevation al view of the electrical'switch enclosing phonograph tone arm engaging stop element of my invention. Fig. 4 shows a top planpview of the said stop element shown in Fig. 3.

Fig.5 shows the stop element of Fig.3 in side elevation, but with the outside cover expose the inner I operative switch parts. I o l I p i Fig. Z6 shows a top plan view ofthe'elecv gnetically oper ated stop mechanism comprised in my inve1ition, but with the top cover plate therefor removed" so to expose the inner electrically con olled and controlling mechanism.

Fi J Y is a; sectionalviewtaken on. the line A-r thearrows shown for-the said line.

Fig. 5 shows a sectional View taken on the line B .l3 of Fig. 6 looking in the direction oil the arrows indicated tor the said line.

Fig. 9 shows'an ele'vational viewv of the terminal block-comprised in the apparatus of Fig. 6'. f

' Fig. 10 is a diagram of the'elect-rical circuits involved in the illustrated embodiment of my invention. I

Fig. 11 is a side elevational View of the apparatus of Fig. 6,'but with the cover plate therefor incplace.

Fig. 12 shows an elevational View of the i stop element ofllig Syrewed from the direction of the approaching tone arm.

Referring nowto all ot the figures 1n which like parts are indicated by like reference characters, atllis shown the top wall of a phonograph motor enclosing casing,

and which wall is commonly madeot wood and forms a supporting board for the phonograph-motor 2iwlnch is attached to ts underside, and which imotor, in the present embodiment of my invent-ion, is an'electrical motor. 7 i v The electrical motor 2 is adaptcdto rotate the phonograph mun-table by means of a turn-table shaitt +l supporting the said turntable and rotated by the motor 2 through suitable gearing, not herein shown, but well known in the art-f The electrical circuits for the electric motor Flare illustrated diagrammatically in Fig.

10 wherein at 5 are shown a pair of circuit 35' conductors leading from a source of electri cal current, not-herein shown, to the phonograph motor mechanism, the said electrical conductors 5 connecting in serial circuit, the

field windings 6 and the armature 7 oi the motor 2,,and an electrical switch contact set 8, said contact set when its contacts are closed being adapted to cause the energization of the said motor windings from the said source of current to operate the motor.

The electrical circuits shown in Fig, .10 comprisealso a branch circuit comprising an electro-magnet 9 adapted, when energized,- to interrupt the circuit closedby the con- ,tactsS, and an electrical switch comprising let in the phonograph stop pre-set member an outer 15,, the said member comprising casting of electrical nsulating material such as bakeli-te orfother cquii alent material for the purpose.

0f the nob 32,,or when pre-setting The stop element show-n in Figs. 3 t0 5 inclusive, comprises a base member 16, and an adjustablestop element member 15,-the said base member comprisinga bottom base portion 17 and upwardly extending flanges l8 and 19, the element being disposed be,-

' tween the iiianges 18 and 19 and secured there- 'to by a bolt 20 passing through an opening 21 of the element 15, and an aligned open .ing in the flange 18 being screw threaded into the other flange member 19; in this way the. element 15 frictionally, but rotatably held between the two flanges of the base men'iber 16. The springs 11 and 12 carrying the switch contacts 10 are secured by inaehine screws and 23 a wall of the enclo'singelement 15, each 01" said springs being-electrically insulated from the other.

Theswitchactnating spring 13 is snapped into place within a slot '25 disposed within the chamber 14 ofthe element 15 andnear the bottom of the said chamber, the slot being so shaped and the spring '13 being so termed that the spring 13' will be given a bias toward the wall 26 of the chamber 14; within the element 15.

The spring 18 carries near its free end a contact element 2'? of insulating material adapted'to Contact when'the spring 13 is deflected inwardly with the end of the spring 11 so asto cause the electrical contact 10 carried by the spring 11 to engage the electrical contact 10- carried by the spring 12 so as to ciosethe said contacts and establish an electricalcircuit between the circuit conductors 28 and 29 leading to the springs 11 and 12 respectively. Y

The spring 13 carries near its free end outwardly extending flange 30 which projects through a slot 31 in the wall 26 of the element 15. V The element 15 has anob handle end portion 32 adaptedto be manually grasped to rotate the element 1.5 about its supporting shaft, the bolt 20 disposed through the opening 21 of the said element. i

The elem-cut 15 is relatively long and need only be rotated through a small are in order to accommodate itself to any desired set position, orinoperatiye position. I am thus enabled to pivot the element 15 that it will rotate in a yerticalplane and, be mounted on the supporting board 1 oil phonographs varying widely in desiginand the element 15, moreover, so constructed, may be manually operated by the operator taking held before starting a record willbethrown toward the tone'arm manually, and then the tone arm I arm again reaching the end-of-record posi- C1011 will press the flange 30 of the sprlng l3 inwardly to fie the said spring to cause lts insulating contact Q'Ztc forcethe contacts 7 10 of springs Hand 12 together, thus closing as -circuit through th i contacts it for the phonograph stop, or tripping magnet 9'. The tripping mechanism comprising the inagnetQ is illustratedin F 6 to Q-inclu-V sive, in considerable detail Referring to thesaid figures, the magnet 9 is shown as being supported on the frames33 by machine screws 34 passing through turned over flange 35 of the base 33, and which screws 341- are screw threaded in the core36 of the magnet 9, said core progecting from the end of the magnet 9 sufiiciently for the purpose,

, The other end of the core comprising the being pivoted at 39 on a rod 40 secured to flange portion -12 thereof.

the base 33 at 41, and tore turned-over 'A rearwardly extending arm 43 of the armature 38 is adapted to he moved to en'- gage a notched portlon 4A of a starting and stop lever 45 which is pivoted at 46 on the said casting 33 in order to stop the phonograph motor whenever the electro-magnet 9 being energized, attracts the armature 38; An electric switch comprising a pair of normally opened contacts 8 is carried on the base 33 resilient springs 4-8 and 49, carrying the contacts 8 being mounted on a flange 50 of the base 33, the said flange being disposedat right angles to the said base, and the springs, beingsecured between inthrougha considerable angle about its pivot The pivot tfi consists of a'rivet havir hodylof the lever member 45 that thecontacpad 59, may, in-the position assumed e lever 45, as shown in Fig; 6, engage with the flanged run 6 of the turn-table3; a

v section of the said flanged rim being shown H1 Fig.8 with the friction pad 59 shown in rfrictional engagement therewith whereby the sa d turn-tahle. i v

flt will henoted that in such a position} the lever 453's disposed, at anflangle to a diameter of the turntablejzind in such a direction thatthe turn-table direction pad prevents the rotation ot'the Czi rotation, when the turn -table rim 46 engages theipad 59gtends to increase thisjangle so ---that abindinp; frictional"contact is had between'thesaid pad and the/said 'inr The operation of the mechanism of invention ishriefiy as toll0ws- The operator ilacesa phonograph recon, on the turn-table; and after 'de lecting'the element 15 toward. the tone'farnn moves the tonearm inwardl toward the center of the i r Y c recordiuntil the reproduoer 66 hastalrentnat positlon whi'ch it wlll later assinn'e when it freachesthe end of therecord and the tone arm 67 will have made contact with the con the said element to rotate rearwardly about sulating washers 15 by machine screws 52 its center of rotation 21, and thenthe operpassing through openings in the, i said ator having completed-what is termed the washers and somewhat ,larger openings in pie-setting operatiom manuallyrotates V the said springs, and through a clamping plate 53, the ends of the said screws being screw threaded into the Said: flange 505 the end 54 of the spring- 49 which I term the actuating spring is disposed at an angle to the body of the spring and is adapted to engage the outer peripheral surface55 of a. roller 56 loosely and rotatably carried on the end 57 of the lever 45 distant from the handle 58 or the lever handle. j

The handle 58 supported on the outer end of the lever 45 and projecting upwardly there-from carries on its inner upper end 60 f a friction contact element such as tlie felt pad '59, such padrbeing fitted tightly within a cylindrical recess Gliin the said handle 58.

' The lever 45 has its handle portion? errtending through an opening 63in. the cast ing 33, said opening being provided by the omission of a portion ofthe 'flangedside members 6201? the'base83; the-said side memhersprojecting upwardly from the said base. i r Y The '.o} nenin gg 63is madesufliciently wide as to permit the lever at to 'be' rotated the lever 58 counterclockwise.

Thiscauses the disengagement of the triction contact pad 59 with the turn-table 6? thus permitting the; tnrntahle to rotate when the electric motor 2 I motor 2 is started'hy the'movernent of the lever 58, since such movement causes a camming of the actuatingcontact spring 49% the rotatable roller 56 whose face 55 engages normally the turned end 5a of the said spring, so that the actuating spring is'nioved is started. The

to-jconta'ct closing: position wherein the coni tacts 8 are closed. The contacts 8 heingin the energizing circuit the motor 2, when closed, therefore connect the incoming; circult conductors 5 from the source o t energizing cnrrentftothe saidwindings of the said motor, and the motor is thereby started.

' f 'The 'motorwill-operate atsuhst'antially a constant eed und er the a control otthe gov erningi apparatus indicated genera-lly'hy the numeral 69 Fig; 10, and' the turntahle 3 being; freed from the'restr aint ofthe friction pad 59, w1ll he rotated by'the power otthe gsaldmotor transmitted to the tn'rn-table'hy its suitable reducing gear mechanism shown. The turn-table will continue to rer a pressure against the said lever to force x in Fin. (3 whereinthe contact pad 539 pleted from the scarce ot current, and niaenct will attract the pad 59, tend to so move the l tats and the spirallvgrooved record wil direct the tone arm toward the center of the record; thetone arm rotatingclock-wise until it engages with the contact piece flt carried on the spring 13 oi the element; 15,

and such engagement will flex the spring 1 5 its end of record playing position to operate the said switch. I

2.111 a pre-set phonograph stop mechanism, the combination with aphonograph until the spring carried contacts are armat rearwardlv intending 'arn armature will be rotated COUEitcr-clOClUYL about" a center 39, and will engage the notched portion 44' of the lever exert same in a clockwise direction about its center as. and utter a rertain amount of levcr movement under the power of the armature 38. the power oi the spring; ti will reini orce that appliedbv the armature mm 53 to accelerate'the rate ot movement oi h said lever 58 to cause it to be snapped turn-table rim engaging position as sho 1 v Lih tionallv engages the rim 6 i. 1 l

Also as has been explained, the clocl rotation of the turn-table before comm to rest will. bvi'rictional cima nient with this ufOEHGlll' the'pad will make even'closer enna and a tighter contact wit turn-table, so that the turn-table will quickly be broughtto rest and held against movement. the motor circuit, having been interrupted bvthe breaking-'0'? the i-ontacts 8 upon toe clockwise rotation oit i e said h ver 45, v v

rlavino' thus described my invention in a specific embodiment, I am aware that numcrous and extensive departures nia'v be made from the embodiment herein illustrated an d described, but without departing;-

from the spirit of my invention I claim:

1. In-aJpre-setphonographstop mechanism, the combination with phonograph 'starting lever, saidlever adapted to have normal and advanced'operative posi ions phonograph turn-table, motor means to rotate the said turn-table, said motor means starting lever, said lever adapted to have normal and advanced operative positions, a phonograph turn-table, motor means to rotate the said turn-table, said motor means being responsive to the movement of the said lever from its normal to its advanced posi-" tion to rotate the'said turn-table, electromagnetic means adapted when energized to restore thesaid lever from its advanced to its normal position, an electric switch controlling;- the energization of the said electro magnetic means and means responsive to the movementfoi thetone arm to substanh'the rim of the;

tiallvits end-o'f-record playing position to operate the said switch, said switch comprisinn a pairof normally open contacts, and an actuating lever "torthe said contactsadapted tone arm,'and adjusting means for the said ctuatin i lever adapted to adjust the said ever to different contact closing positions in the path of the said tone arm. 3. Ina pro-set phonograph stop mechanism, the combination witha phonograph start ng lever. said lever adapted to have normal and advanced operative positions, a

phonograph turn-table,motor means to rotate the said turn-table, saidimotor means being responsive to the movement of the said lever "from its 3101111211 to its advanced position to rotate the said turntable, electromagnetic means adapted whenenergized to restore the said lever from its advanced to its normal. po-

'on an electric switch controlling the ener gization of the said electromagnetic means,

said means responsive to the movement of the tone arm to substantially its end-of-record playing position to operate the said switch, a casing for the'said switch enclosheingr responsive to the movement of the said lever from its normal to its advanced posi tion to rotate the said turn-table, electromagnetic'means adapted when energized to" restore thesaidlever from its advanced to its normal'position, an electric switch con-- trolling the energization of the said electro magnetic means, and means responsive to the -movement of the tone arm to'substantially ing the same said casing comprising walls oi'insulating material, a base for supportlIlQiillQ- said casing, said casing being rotatably secured to the said base, means for irictionally holding the said casting in any preset rotative posit-ion an actuating element adapted to project through 'a wallof said casting and adapted to be disposed in the path or the advancing phonographtone arm said actuating elementwheu engaged hv the said "tone arm adapted to close the contacts of thesaid switch. p 7 r I I l, In a pre-set phonograph stop mechanism, the combination with a phonograph starting lever, sai d lever adapted to havenor-- mal and advanced o erative iositions' a phonograph turn-table motor means to rotate the said turntable, said motor means being responsive to the movement of the said lever from its normal to'its advanced position to rotate the said turn-table, electromagnetio means adapted when energizedto restore the to be disposed in the path of the advancing said lever from its advanced to its normal position, an electric switch controlling the energization of the said electro-magnetio means, and means responsive to the movement of the tone arm otojsubstantially ltSf end-of-record playing position to operate the said switch, said'lever in its normal position making frictional engagement with the saidturn-table to trictionally 'holdyit against rotation.

5. In a pre-set phonograph stop mechanism, the combination with a phonograph" starting lever, said-lever adapted to have non mal and advanced operative positions, a phonograph turn-table, motor meansto rotate the said turn-table, Sflidll'lOtOf means being responsive to the movement of the saidlev'er from its normalto its'advanced position to rotate the said turn-table, electro-inagnetic means adaptedwhen energized to restore the said lever from its advanced to its normal position, an electric switchco'ntrolling the energization of thesaid electro-magnetic means, and means vresponsive to the movement of the toneoarm to substantially its e-nd-of-rec ord playing positionto; operate the" said switch, aipair of normally open switch contacts adapted to begelosed responsive to the"- ITOOVGIIIBIlf/Of the said lever to motor starting position. I 4 '6. In a pre-set phonograph stop mocha:

nism,the combination with a phonograph starting lever,said lever aoapted to have normal and advanced'operat ve positions' a phonograph turn-table, motor means to ro-' tater the said turn-table, said motor means be-' ing responsive to the movement of the said lever from its normal to its" advanced position to rotate the said turn-table, electro-mgafnetic means adapted when energized to restore the said lever from its advanced toits normal position,.an electric switch controlliiig the energization of the said electro-magne tio means,

and means responsive'to the movement of the tone arm to substantially its 'end-of-record playing position to operate the said switch, said lever in its normal position making frictional engagement with the said turn-table to frictionally' hold it against rotation a pair of normally open switch contacts adapted to be closed responsive to the 'movement of the said lever to motor. startin position.- V

In a 'pre-set' phonograph stop mechanisrn, the combination with a phonograph. starting lever, said lever adapted to have nor mal and advanced operative positions, a phonographturn-table, motor means to s rotate the said turn-table, said motor meansbeing responsive to the movement of the said lever from its normal to its advancedposit on to rotate thesaid turn-table, electro-magnetic means adapted when energized torestore the said lever from its advanced to itsnormal position, an electric switch controlling the P 6 5 Sotative 'ener me I I I I means responsive to-the moveiiint oi the tone arm to substantially liZS'QIld",

tien the said electro-magnetic of recordplaying position to operate the saidaswitc a casting for thesaid switchenosing the same, said eastingficomprising ails of insulating material, a basefor sup-j the same casting, said; casting being tatablyseenred to the'said base, means for ctionallyholding thesaidoasting in any oosition, an actuating .ele-

ment adapted-to project through a walliof f gaged by the $5&i(i i10118'tlflnfldttptfid to close the, eontacts ot'the, said switch, said lever inits normal positionmalring frictional engagement with'the said turn table tofric tionaliy hol "against rotation, a pair. or" e normally open switch contacts adapted to fene saidcasting' and adapted to be disposed 1 a :tn eypath otthe advancing phonograph tone arm, said-actuat ng 'elementiwhen'en .1

he closed responsive to the movement of the s'aidlevei" to motor starting position.

'8 In a pre-set phonograph stop-mechanism,;the {comb nation with a phonograph starting lever, said lever adapted-to have normal and advanced operative positions,-

.phonogra'ph' "turn-table,- motor means to rotate the said turntable, said motor means bein res ionsive to the" movement of the" V ,-r. N: n sai lever from-1ts1normal toits advanced L I L i i I position o ro ate the said turn-table, elec: troonagnetrc means adapted when energized to restore the SttlClglGVfil fromits advanced to its normal position, anelectric switch 0011-. L'*oll1n. the ener ization of the said :electroo b operate the said switch, a spring associated Withthe said starting lever andiadapted to accelerate, its movement toward normal "inagnetic means, and means responsive tofl the movement ot the tone arm to substan ,t all y itsendpf-record playing position to positiomzsaid springoeing so disposed rela- Jtro-magnetic means adapted when energized to restore the said lever from its advanced to ts normal. position, an electric switch controll ng theenergization of the saidelec tro-niagneticf-means, and means responsive to theinovement or the tone arm to substan- -tially its end-of-record playing position to operate the said switch, a'zspring tending; to maintain lever in normal 'positiomsaid spring when saidlever is movedto said advenced position being adapted exert :i gmssureto maintain the solid lever in said otl need position.

1min -zi'pre-set phonograph stop mechani'sm, the combination with e phonograph stsrtinglever, said lever adapted to have normal end advanced operative positions, a V phonograph turn-t eble, motor means to rotate thesiiid t'liin-tsl)le,said mot rinezins being responi .ve to tlie movement of the said r lever from its normel'to its edvsneed posi- I ,tion to r tats thesaidturntable, electrotrolling the energnormal and advanced operative -,sziid lever from its normal to position to rotate the magnetic inc irestorethe its normal la-opted when energized to i lever from advanced to position, on electric svvitch eon- :tion of the said electromagnetic means, and in i'espons ive to the movement o the tone arm to substan- 'tially its ond-oi-i'ecorcl playing position to operate the said switch, and electrical motor elements for-the said motor, said switch eoniects being included in the energizntion ciroiiit of the said electrical motor elements.

11; in a preset phone ph stop, mesheism, the combination with iiphonogreph.

starting lever, said lever epted to hex-epositions, a giihonogrsph torn-table; motor means to 'ota'te the mid. turn-table, sand motor mes being responsive to the movement-of the l enee'd tijo magnetic means adapted when energized to restore the seid'lever from its advanced tofits normal position, on electric switch nontroll tro-magneoie means, and means responsive to theinoveinent of the tone arm to sub-i, 'stsntmlly its end-of-reoord playing positionsaid tnrn tsble, elee' the energizetionot the aid eleo 7 'iteh, spring associated .i er and adapted to rate its movement toward normal on, said spring being so disposed reluo the lever that it will he ineffeo to tend to move said lever from its fully winced record playing position, and electrical motor elementsifor the solid motor,

res'iiore the ssi'd lever from its advanced to 7 its normal position, an electric switch eon-i trolling the energizetion of-the said electroinegnet oniezins, and means responsive to the movement of the tone arm to substantially its en'dpl-i'eoord the said sw tch, 'a spring tending to 1n: .in teinjsaid' lever in normal-positicm suid. spring when said lever is moved'to said advanced i osition being adapted to exert :1 pressure to maintain the said lever in'ssid ,i ments for the said motor, said switch contacts being included 'in the 'enelgizin circuit of thesaid oleetrioal motor element.

Witness v-hereof, 'I have -hereunto signedmy name this Nth-day of April, 1922.

VIM; W; DEAN.

"phonograph stop mocha led to playing position to operate 7 advanced 'position, and electrical niotor'

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