US1001171A - Attachment for talking-machines. - Google Patents

Description

F; W.I SCHMIDT.

ATTACHMENT-FOR TALKING MACHINES.

nn'maxqmn FILED MAR. e, 1911. 1,001,171, Patented Aug. 22, 1911;

2 SHEETS-SHEET 1.

WITNESSES @cZ/W; QMW KM NVENTOR ATTORNEYS 50 "Similarnumerals of reference innnnnicx' 's'cniirinr; orrn nnnnnrnm, rnm isiznvnnm.

hmncmuniv'r roe. T'A KINe MAcniNna V Specification of Letters Patent. '22, 191i.

Application filed arch's, 191 1. Serial It'd-613,028,

rtelzfwlmemey 06mm 'Be' it known that I, FREDERICK W.

a citizen of'the' United: States, ie- I sid ng f in the city and county of PhiladelphiafState' of Pennsylvania, have invented Ilew and useful Attachment for framing- Machines,of hich the following is a specifi ti g My'in'vention consists of van improved at- Y whereby the machine is stopped when the stylus a --record; o

y It -further consists of such apparatus which may be attached to'a talking machine 'without rfequiring records of special constlfllctioninv f .5 I t' fin ther conists of other novel features of constructiom-all as will be hereinafter fiilly set forth. a

" 7 For the purpose of illustrating my inven- 'tion,- I have shown in the accompanying drawin s one formithereof which is at pres,

i cut pre erredby me, since thesame has been results,although it is to heunderstood that'the various instrumentalities of which my invention consists can he variously arranged and organized and thatmy invention is not limited to the precise arrangement and organization of these" instrumentalities as herein, shown and described. a V

Figure 1 represents a perspective view of as muhh of a-talking machine as will illustrate the application of my invention to the same. Fig. 2 represents: a .diagrammatic' Pla n-view." of the tone-tube, sound-box, turntable and record ofa talking machine, illustra'ting my improvement in place and dia grammatically illustrating the electrical connections. Fig. 3 represents a perspective view of the slotted finder bar of attachinent. Fig. 4 represents a perspective .view of the brake hox.-'- Fig. 5 represents agpl'an viewof the-'brake-mechanism. Fig. 6 represemen a'xialsection of the brake-cylinder,

brake-lolock and contacts: Big. 7 represents 'ga-verti'eal section of the postupon vvhich the slotted barisadjustably'secured;

indicate corresponding 'pairts in the figures Referring to the drawings,the numeral. indicates'the cabinet of atalking: machine, upon the top of which-is the record-carrier or turntable, 53, carrying the record, 3,- A

rrives at the end of the groove in the found in practice to give satisfactory and rethe cabinet and carries the tapering" tonetube,"6, and the horn-elbow, 6. A soundbox'; 7, is supportedat the free end "of the tone tube, ands'uit'ably carries the stylus. or needle, 8. All of these parts are of the usual or of any suitable construction, such as found in the"" well-known forms of talking I machines. 15 tachment for sound reproducing mach nes,

A hollow post,'9, is secured upon the top ofthe cabinet, and a split plug, 10,-having a shouldered head, 11', fits in the bore of said post, I A clamping thumb..-screw,z.12, is threaded into the top of the head of cl1e. plug, tmd serves to clampa'flat finder bar, 13, having? a longitudina1 slot, 14, with which it is 'mova'ble upon theshank ofthe screw. Near its "free end this flat bar can ries a stud,15, through which passesa con tact screw, 16. The'outer end ofjthe' flat, bar projects laterally, in L-shapey'ahd ahead,

17', is provided at [the extreme ofthe L, and

has a needle, .l8,-secured in it by asetscrew, 19.

A base-plate, 20, is secured upon'the top. of the cabinet and'tofoneisideof the;turn-I table, and hasa cover, 21;, forming area'- tangular brake-box. A brekecylinder, or casing, 22, is secured upon said base plate and in electrical contact with thesame .a'ndv a plunger,'-23, fits to slidewithin it and has a pin, 24,]projecting through a, slot, 25 ,gin

laterally projecting tooth,; 26, "which projects through a longitudinal slot in theside of -the cylinder. A brake-plug, 2?,-

of leather, fiber, or other suitable inateriahfits in a socket in the end of the piston,- to engage the rim=of the turntable to, stopits rotation when the piston is pforcedoutwardv hy a coiled spring,- 28, within the boreof the cylinder and bearing against the piston. 1 The opposite end of thebrakescyl-inder-is closed by- :a plug, which confines the springanda flanged sle eve, 30,, of insulating,

Inaterialfits in arterial bore in said;p lug..

pin, 3,1,.fits in the bore-offthisjsleeue and i has ,1 a contact-poi nt, 32, -up'on;.=its inner, end

and a "head/33, upon its ,outernend A headed pin, 34, has play inan,axialbore,35,

in the braliefpiston, and. is held from slip-i ping out at, the ;inner end of said-bore by the latter having .acontracted inner end. Said headedpin has a, contact point, 36,;at

I hi ackeue, projects upward from one side of i the upper side of the brake cylinder, and a to the contact-point of the stationary pin, and a spring, 37, serves to. force the head of the movable pin against the contracted end of the here. The laterally projecting} tooth upon the brakepiston will engage a detentuiotch, 38, in-the armature, 39, of elec.-.

' tro-1na nets 39* when the brake. aistonis moved inward. The cover for the brakemechanism has an opening, 4:0, in its-side, through which the end of the brake-p1ston and its plug may project, and a slot, 41, in

its top, thi' ough which the uprightpin upon 'the brake-piston projects and in which it slides. The end. of this pin is engagedby a slot in the end of a thumb-lever, 42, pivoted upon the cover, and by means of which lever the brake may be set. v

One terminal, 43, of a battery, 4:4,is con- 'nected to the head of the stationary'contact pin in the brake-cylinder, and the other terminal, 47, is connected to the tone-tube of the talking machine.. The slotted bar and its post is connected by a wire, 45,'to one terminal, d6',.of the; magnet windings, and the other terminal is grounded, at 48, to

the base-plate of the. brake-mechanismand thus to the brake-cylinder andpiston.

In practice, the slotted finder bar is adjusted by means of the clamp-screw to bring the pin. above the blank central space of the record. When a record, is placed on the turn-table, the finder bar is moved laterally until theneedle at "the end of-the bar can engage the end of the last groove upon the record when depressed, the needle being normally out of contact with the record. As

now the sound-box and tone-tube are moved inward by the needle-following the spiral groove in the record, the sound-box will at.

last make contact with the contact screw upon the bar, as the needle reaches'the end 'ofthe groove. -This will close the circuit 1 throughthe tone-tube'and slotted arm, causing the circuit to pass from the battery, through the wire, 4:7, to the tone-tube andsound-box, through the contact-screw and slotted arm and the wire to the electromagnets. As the brake-piston and plug have been retracted into the cylinder by means of the thumb-lever, the stationary and yielding contacts are in contact, so that the current passes through the magnet windings,

through the base-plate,- through the brakecylindcr, piston and contacts and back to the "battery through the insulated stationary contactand wire, 43. The magnets are'thus in contact. The yielding contact in the brake-cylinder admlts of the points remaining' in contact and the current remaining unbroken 'aftcr'the brake-piston has started forward, thereby preventing the armature from being released until after the tooth on the brake-pistonhas.fully cleared the de- Itent-notchf in the armature;

. By thepmployment of this'deviceya talking machinemay be, promptly stopped at 'the end. of the 'pieceit is playing, thereby preventing the hoarse-and rattling sound of thefnedle traveling over the blank portion of the rficord and saving the record, without obliging' the operator to watch the machine and stopping it at the end of the picce,the action here being entirely automatic. The distance between the pointer needle and the contact screw upon the slotted arm equals that between the point of the needle on the sound-box and the point where the latter contacts with the contact screw, so that the machine may be stopped with great accuracy if the pointer needle has been set over the end of the last turn of the spiral groove,

in the record before the machine is started. The contact-screw may be adjusted to adapt it to make contact with different styles of 1 sound-boxes at the proper point. After the bar has once been adjusted by means of the slot and the clamping screw, accordingftt the size of the machineto which it is'gapa plied, and after the contact-screw has been adjusted, there will be no need forfurther' adjustments of the bar, and all that is necessary to do when a record is changed is to bring the needle in register withthe end of the groove by swinging the arm across the record until, by depressing the end of the bar, the needle strikes such groove.

\Vhile a brake for the turntable has been illustrated and described it is evident that any suitable stopping device for "the machine may be substituted.-

- Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is

.1. In an electrical brake fora talking machine, an adjustable finder bar carrying a contact device adapted to predeterinine the actuation of the brake at the close of the reproduction automatically upon positioning of said finddr bar, a sound-box arm and an electric circuit connecting said contact device and sound box arm.

2.- In an electric brake for a talking machine, a normally open electric circuit having one terminal connected to the sound-box of a talking'machine, a finder bar pivoted at one. end upon a fixed portion of the machine to swing across the record and having at its free end a downwardly-pointing necdle which may engage the record when the bar is depressed and a contact at a distance from the point of said needle equalto the distance from the point of the stylus. of the sound-box to the point of the latter where it will engage such contact, said bar being connected to the other terminal of the en'- cuit, and an electrically actuated brake device in the circuits for stopping the machine.

3. In an electric brake for a talking machine, a normally open electric circuit having one' terminal connected to the soundbox of a talking machine, a finder bar pivoted at one'end'upon a fixed portion of the machine to swing across the record and having at its free end a downwardly-pointing needle adapted to engage the groove in the record when the arm is depressed, said bar being connected to the other terminal of the circuit, a contact-screw in said bar and adjustable to bring its point to a distance from the point of the needle equal to that between the point of the stylus in the soundbcx and the point of the latter where it engages the contact-screw, and an electrically actuated brake-device stopping the machine.

i. In an electric brake for a talking main the circuit for chine, a" normally open electric circuit having 'one terminal connected to the soundbox of a talking machine, a bar pivoted at one end upon a fixed portion of the machine to swing across the record-and having at its free end a downwardly-pointing needle which may engage the record when the bar is depressed and a contact at a distance from the point of said needle equal to the distance from the point of the stylus of the sound-box to the point of the latter where it will engage such contact,'said bar being connected to the other terminal of the circuit and having means for adjusting it longitudinally and forsecuring it in its adjustment, and an electrically actuated bra kedevice 111 the circuit for stopping the ma-

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