US936646A - Graphophone. - Google Patents

Description

T. H. MAODONALD.

GRAPHOPHONE.

APPLICATION FILED APR.Z7,1907.

Patented Oct. 12, 1909.

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T. H. MACDONALD.

GRAPHOPHONE.

APPLICATION BI LED APR. 27, 1907. 936,646. Patented 001 .123909."

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T. H. MACDONALD. GRAPHOPHONE. APPLICATION FILED APR. 27, 1907. 936,646.

I ooNAunof Bridgeport, Connecticut, have inandhas for its object to provide a machine the sound-box .ing a mandrel 12.

' driven by bel't'1-6 extending from the motor.

broken away; Fig.

THOMAS H. maonormfin/ or BR'IDGEPQRT,

OFFICE.

CONNECTICUT, ASSIGNOR TO AMERICAN GRAPHOPHONE COMPANY, OF BRIDGEPOR'I", CONNECTICUT, A CORPORATION OF WEST VIRGINIA.

Specification of Letters Patent.

GRAPHOPHONE.

Patented 0ct.12, race.

Application filed April 27, 1907. Serial No. 370,563.

To all' whom itmay concern:

"Be it known that I, THOMAS H. MAC- vented anew and useful Improvement in Gra v hophones, which improvement is fully set. fdrth in the following specification.

This invention -relates to graphophone'a' of this charactelizwhich Shit-11y be simple in construction,

with a directconnection from into the amplifying horn used in such machines, withou any loose joints between the sound box an thehorni; to roe vide a rigid horn support, and general y a more compact construction. in that formfof machine which employs a cylindrical record, With these objects. i-Ir-view, the inventionconsi'sts of the arrangement and-combination of elements'hereinafter described and then pointed out in the claims.

One mechanical'expression of theinvcntive idea is, for the purpose of illustration, shown in t e accompanying drawings, in whichr Figure 1 is a top plan view with parts line 2-2,'Fig. 1; gitudinal section.

Referring to the drawings, 1 is a. suitable frame provided with a vertical upright-,3,

and provided with a suitable track or race way such as theledges 4,4. A carriage 5, preferably provided with wheels 6, 6, rests upon this track or racewasaid carriage having at one end a vertica upright 7. with an outwardly projecting and preferably hollow bracket p1'ece8, The upright 7 and the bracket piece 8 are provided with bearings 9 and 10 respectively, within which is mounted to turn, a hollow mandrel shaft'll su port- Thismandrel s a t'has,' on diametrically opposite sides of its interior, splinerooves13,1' 3*.

Turning in earings in the upright 3518a shaft. 14 having on its exterior end pulley 15 and Fig. 3 is a central lon- On the opposite end of'the shaftl i is a. pin 17 whose outwardly projecting ends extend into the spline-grooves1'3 on. the interior of the mandrelv shaft 11 with which; the propek lingshaftlisarraugedtotelescope; Beneath the mandrel, propelling screw; 18 is. mounted in the carriage 5, with one end}. projecting through the bearing in the c rriage, and: a; 1

-. End] is in position to lever- 29 is lifted, stood. 2 is a cross-section on the entinstance is.

more ,whereit joins the soundan. opening registering wi or opening sound-box.

" with a; stylus ;to. the frame which is connected .to

. train of gears 19,20 and 21 connect the mandrel shaft 11 with Pivoted to the bearing a nut 24 in engagement the propelling screw 18.

frame 1 at 22 is a lever 23 which nut is-nornially held withthe propelling screw 18 by'the spring-25 secured at one end to the lever'23-and at the other end to the frame of the machine,'as shown. Rigidly secured to and preferably integralwith the lever 23 is an upward-1y project ng arm 26,, whose upper of bell-crank-lever 27, pivoted; to the frame wipe against one armof the machine at 28, the other arm of the lever 27 7 being in position tolift the reprod'ucer, so as to throw the style out of engage- ;ment with the record when the lever 23 is operated against the tension of the spring ;25', by which operation the nut 24 is disengaged from'the propelling screw. As a convenient means for thus actuating the lever 23, a lever. 29 is"pivoted to the frame at 30 with i 23 when the outwardly projecting end of the as will be readily underv one arm in position to engage the lever Rigid-1y secured to the frame 1 is the sound boir 31 with the This connection in the pres-.-

amplifying horn 32' secured directly upon the back thereof, prefjerably so as to swing around, tothe end I that the horn may thesound- 1 box 31 within which the flanged end 33 of the horn snugly bozawith its inneredge projecting over the flange33 of the horn, as clearly shown in Fig. 2. For the purpose of'avoiding unnecessary friction, the end of the horn, or properly speaking, the elbow thereof, has an annular recess 35 formed therein.

The interior of the horn adjacent to the part conical, with its smallest point provided with tlra suitable hole 36 in the top or back of the The sound-box is provided with the usual or any suitable diaphragm 3 7', and bar or lever 38 pivoted at 39 and carrying a st lus lever 40 thed-iap iragnr, as by asuitable thread or other connection; The stylus bar or lever- 38 is normally held 'de box is tapered or pressed by the action of a spring etl, the outer end of said lever being in the path of the upward movement of the bell-crank-lever a previous application of mine, and need not, therefore, be further herein described in detail.

Operation: As shown in the drawings, the

parts are in the position which theyoccupy on the machine and engaging said screw, ,a

at 'tlu' time when the reproduction, of a record has begun, the nut. 24 being in engagement with the propelling screw 18, and the reproducing stylus being in engagement with the record. \Vhen power is applied to the shaft 14 it revolves the mandrel 12 by reason of the engagement of the pin '17 and the splines 13 of the hollow, mandrel shaft 11; and by reason of the chain'of gearings 19, 20"and 21 the propelling screw '18 i.s-re.-

volved; and by reason of the engagement of this screw with the nut 24: the carriage 5 is propelled along theways 4, l the shaft 14:

telescoping with the mandrel shaft 11 during this movement. WVhen-it is desired to stop the machine, the lever 29 is raised, thereby disengaging the nut from --the propelling screw and causing the lever 27 to elevate the 1 stylus to disengage it from the record.

It will be observed that there is thus provided a-very compact construction, with-a rigid horn support, which horn has direct connection with the sound-box, without any movable or loose joints between the horn and the sound-box which would interfere to a greater or less extent withthe correct transbox to the-amplifying horn.

What -I clainiis": v i

1. In a graphophone, the combination of a carriagegla mandrel shaft and 'operating screw mounted to revolve therein a recordcarrying mandrelon said shaft, a-nutfixed l l l power shaft operatively connected to said mandrel shaft and operating screw, a soundbox'fixedly mounted with relation to the mandrel, and an amplifying horn directly mounted on the sound-box.

2. In a graphophone, a frame, a track or way on said frame, a carriage movable on said way, a revoluble mandrel and an operating screw mounted to turn on said carriage, a power shaft having bearing on said frame and operatively connected to said mandrel, a train of gearlngbetwcen said mandrel-and screw, a nut on the frame engaging said screw, a sound-box fixed to the frame, and

an amplifying horn mounted directly on s id sound-box.

3. In a graphophone, the combination of a fixedly mounted sound-box, a hollow mandrel, a hollow mandrel shaft supporting the same, a bearing for said shaft projecting into said inandrel' a powershaft telescoping with and splmedto saidmandrel shaft, an

perating screw and nut one of which is fixed and the other of which moves longitudinally with the mandrel, and operative connections between the power shaft and the one of these elements which moves longitudinally with the mandrel.

4. In a graphophone, the combination of a fixedly mounted sound-box, a carriage, a

f revoluble inandrel and an operating screw mission of the sound waves from the soundspecification in the presence bf'two subscribon said carriage,.a lever, pivoted to the inachine frame and bearing a nut engaging said screw, a record on the mandrel, a stylus on the sound-box engaging the record, and

means operated by said lever when it is moved to disengage the nut from the screw,

which means lifts the stylus from the record. In testimony whereof I have signed this ,IV itnesses A. Gnmnn, B. NICHOLSON.

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