US1123147A - Instrument for magnetically recording sound vibrations. - Google Patents

Description

J. c. SHERMAN.

INSTRUMENT FOR MAGNETIGALLY RECORDING SOUND VIBRATIONS.

APPLIGATION PILEDNOV. 21 1908- Patented Dec. 29, 1914.

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J. 0. SHERMAN. INSTRUMENT FOR MAGNETIGALLY RECORDING SOUND VIBRATIONS.

' APPLICATION FILED NOV. 21, 1908.

1, 1 23,147. Patented Dec. 29, 1914.

6 SHEETS-SHEET 2.

J. G. SHERMAN. INSTRUMENT FOR MAGNETIOALLY RECORDING scum) VIBRATIONS.

APPLICATION FILED NOV. 21, 190B. 1 1 2 3 1 47' I 4 Patented Dec. 29, 1914.

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I J. G. SHERMAN. INSTRUMENT FOR MAGNETIOALLY RECORDING SOUND VIBRATIONS.

APPLICATION FILED NOY. 21,1908- I, 1 23, 1 47. I Patented Dec. 29, 1914.

6 SHEETS-SHEET 4.

Jrz C. 8 7772 002 WI F J. 0. SHERMAN. INSTRUMENT FOR MAGNETIGALLY RECORDING SOUND VIBRATIONSF APPLICATION FILED NOV. 21, 190B.

1 1 23, 1 47, Patented Dec. 29, 1914.

6 SKEETSSHEET 5.

J. 0. SHERMAN.

INSTRUMENT FOR MAGNETIGALLY REGORDING SOUND VIBRATIONS.

APPLICATION FILED NOV. 21, 1908.

1,1 23, 147 Patented Dec. 29, 1914.

e SHEETS-SHEET s. =l l l ma I I STATES PATENT OFFICE.

JOHN C. SHERMAN, 0F BROOKILINE, MASSACHUSETTS.

i INSTRUMENT FOR MAGNETICAIJLY REGO RCDING SOUND VIBRATIONS.

To all whom it may concern: Be it known that I, JOHN Brookline, in the county of Norfolk and .State of Massachusetts, have invented cer- 5 tain new and useful Improvements in Instruments for Magnetically Recording Sound Vibrations, of which the following is a specification. v a

This invention relates to instruments by which articulate speech and other sounds are recorded by producing in a-record element varying degrees of magnetization corresponding to the sound vibrations.

' In particular, the invention relatesto the type of instrument known as the telegraphone, in which the record is produced upon a "steel wire which passes between electro-magnets of'which the coils are in circuit with a sound transmitting circuit, whereby the strength of the magnets is continually varied in proportion to the amplitude of the sound vibrations.

.=S uch machines of this character as have been constructed up to the'present time are operated and controlled entirely by electrical deviceswhich, with their-numerous circuits, are very complicated and liable to derangement. The slight'shocks incident to ordinary handling of such devices will frequently derangesome of the delicate adjustments and repairs to any one part which may be out of order cannot be made without affecting other parts, and requiring an overhauling of the entire system. In particular,

the motor which causes feeding of the steel recording wire are so intimately associated with the recording circuit wires which control reproducing, erasing and recording the wire through the bushings and guides which retain it in place between the magnet cores' It is frequently necessaryjin using these instruments to substitute one record for another, soflthat wires which are used Specification of Letters Patent.

C. SHERMAN, of

the' connections and controlling relays for functions that any slight disarrangement the receiving drum, and drawing the end of Patented Dec. 29, 1914.

Application filed November 21, 1908. Serial No. 463,737.

for dictation, for instance, may be kept distinct from those for recording telephone conversations, and so that different classes of records may be kept together in an orderly classified system. Whenever such a substitution of records is made, however, the wire is commonly withdrawn endwise as before stated, to clear it from the magnets, and a clamp placed over the coiled wire to keep it from unwinding. Then the substituted wire or the removed Wire, when it is re placed, commonly has its forward loose end threaded through the recording magnet cores and the bushings and guides, and fed along to the point at which the, previous record ends before it is used for taking the further records which are to be put upon it. As the wire itself carries no tallying device, there J on this substitute record at which to resume dictation, consumes a great deal of time, and

requires much patient labor, for the threading of the wire through the magnet cores, guides and bushings is itself a delicate and tedious operation. v

It is the object of the present invention to overcome these and other practical defects of the telegraphone as now constructed for commercial use, by providing, first, a direct drive for feeding the wire, which does not require to be reversed in direction and is .operatedwithout relay parts or circuits, and which may be quickly removed from the telegraphone box without the slightest disturbance of, or disarrangement in, the recording or erasing or reproducing system of the. instrument; second, by mounting the bobbins, drums or reels which carry the record wire upon a separate removable drum or bobbin carrier which can be readily connected to and disconnected from the body of the instrument to permitv immediate substitution-of one record for another, and by so arranging the recording magnets that they will permit insertion and removal of the record wire without requiring it to be withdrawn or threaded into the same endwise, and so without requiring any alteration of the position of the wire on it: bobbins as a preliminary to its removal or use after being replaced; thlrd, by providing a wire-tallying instrument which may be kept wire which remains unused and the points at which any separate records or parts of a record begin and end,'so that any particular part may be found without auditorily exploring the wire; and by other improvements hereinafter described in full detail and particularly pointed out in the claims.

In the drawings which illustrate an instrument embodying the essential principles of the improvements which constitute my invention, Figure 1 represents a longitudinal section of the main portion of the -instrument showing particularly the driving means for feeding the record. Fig, 2'represents a cross-section with the record holders removed. Fig. 3 represents a plan view showing the instrument with one of the record holders in place and the other removed. Fig. 4 represents a cross-section on. line 4-4 of Fig. 3. Fig. 5 represents a plan view of one of therecord holders detached from the instrument. Fig. 6 represents a sectional view of the same on line 66 of Fig. 5. Fig. 7 represents a cross-section of one of the record holders. Fig. 8 represents an elevation of one of the sets ofmagnets. Fig. 9 represents a sectional view of a set of magnets on an enlarged scale. Fig. 10 represents'a plan of one of the magnet cores. Fig. 11 represents a fragmentary sectional elevation of part of the swiveled and pivoted holder for the recording magnets. Fig.

12 represents a diagrammatic view illus trating the electrlc circuits for recording and reproducing sound. Fig. 13 represents an elevation of a dilferent arrangement of recording magnets and magnet holders. Fig. 14rep'resents a plan, and Fig. 15 represents a side elevation of the same. Fig. 16 represents a perspective view of one of the pole Fig. 17

pieces for this type of magnet. represents a diagram showing the electrical connections for the several parts of the in strument.

The same reference characters indicate the same parts in all the figures.

The apparatus as here embodied, com

prises. acentral box or casing 1 in which iscontained a motor 2 fastened to an end panel 3 of the casing. The motor has a vertical shaft 4 on which is a bevel'gear 5 driving a gear 6 on the shaft 7. 4 From this shaft the bobbins or reels which'hold the record wire are driven in either-direction through driving connections consisting of the gears 8 and-9 and the widefaced pinions 10 and 11, the latter being in mesh respectively with'gears 12 and '13 mounted upon. shafts 15 and 16 which are movable endwise 'tion of the for a pin-pose hereinafter explained, the

extra width of the pinions 10 and 11 permitting this movement without interrupting the engagement of the gears and pimons.

The shaft 15 carries friction clutch members as'cones 17 and 18 whichare adapted to enter and engage complemental clutch members, such as loose drums 19 and 20,

having recesses to receive said cones, and

themselves hearing against frictional sur-' faces 21 on the faces of disks 22 and 23 and so drive the latter frictionally. The cones is connected- The other shaft carries corresponding clutch cones 24 andj25, which engage drums 26 and 27 alternately and drive disks 28 and 29 through the friction surfaces 30. These disks are mounted on studs which carry disks 31 and '32 projecting through the side of the box 1 and adapted to drive thereels or bobbins on which the record wire is wound. Fig. 3 shows one pair ofthese bobbins in operative relation to the driving mechanism, such bobbins being represented by 33 and 34, and having connected with their shafts the disks 35 and 36 which carry facings 37 of frictional ma;-v

terial to bear against the outer faces. of

the di'sks 31 and 32 and effect a frictional clutchingengagement;

The wire drums 33 and '34 are mounted in a separate carrier or holder 38 which is removable from the body of the telegraphone and is adapted to be connected thereto in such a way that the record wire is carried from one drum to the other between the recording magnets, as will be presently .de=- scribed. When in place, the inner end of the carrier 38 rests upon a narrow shelf 39 of which there is one projecting from each i of the Wider sides of the box 1, and is held between the end flanges 4.0 of this shelf. It

is locked in place by a bar41 on its upperpart which projects through a hole in the side of the box 1 and which has a notch 42 receiving a locking plate 43. As shown in Fig. 7 this locking plate is mounted on the inner surface of the sidewall 44 of the box in such a mannerthat it can slide vertically ,through a slight distance, being held by screws 45 passing through vertical slots in the plate. There is .also a'hole. 46 through which, when the plate is elevated, the end of the bar 41 may pass, and it'is the porters the notch 42 of'the bar to loek thesame in position. When the bobbin holder 38 is thus attached to the telegraphone casing,

the record wire 47 passes between the re plate above this hole which en- I cording magnets which are mounted on the outside of the box, one oneach side thereof.

As shown in Fig. 9, a' set of magnets consists of two pairs mounted in holders 48 and 49 arranged on opposite sides of the record wire. The magnets are represented by-5O 51 52 53, those numbered 50 and 52 constitutina one pair arranged oppositely, and 51 and 53 the other pair similarly arranged. The magnets have central pole pieces 54 of which those of each pair are approximatelyin line andemb'race the record wire between them. The form of each pole piece is shown in detail in Fig. 10, being beveled to an edge at the end which is next the wire, and having a notch 55 to receive and partially surround the wire. By reason of this construction the poles of each pair of magnets surround the wire and produce a magnetic field of equal intensity on all sides thereof. The pole pieces are of such construction, being round bars, that they can be easily slipped out whenever this may be required, and when in place are removably held by pivoted locks 56 having fingers which embrace the end of the poles and enter grooves 57 therein. These grooves are parallel and in opposite sides of the pole, so that the fingers when embracing them, prevent the pole from rotating.

The magnet holders are carried by angular arms 58 and 59 whichjare pivoted to a stud 60 swivelly mounted in a sleeve 61, which in turn has a stud 62 entering a socket 63 which is fast to the outer side of the wall 44;, in which socket the stud 62 is secured by a thumb=screw 64. Each magnet holder is attached to its respective arm at a single point through a screw 65, so that it can turn rotarilyfabout the axis of the screw, and at the same time both magnet holders and the arms on which they are mounted can swivel about the vertical axis of the stud 60. Thus the magnets are enabled to adjust themselves to the varying d rections in which the record wire may extend. and need not deflect it from the straight ine between the devices which lay t upon the drums. For instance, as the wire 1sv wound upon one drum and unwound from the other, it constantly travels back and forth from side toside of the drum, and

lies at varying angles, as will be understood by comparing Figs. 3 and 5, and the swivel mounting of the magnets allows them to follow the angular movements of the wire.

Mounting the magnets as described upon pivoted arms 58 and 59 enables them to be widely separated to permit the ready insertion and removal of the wire from be tween them. In order that there may be no danger of damage being done to the wire or the magnets upon removal of abobbin holder from the instrument, I provide means for separating the magnets before it is possible to remove the holder 38, and for retaining them separated until one of he end of the locking plate 43. This lever con stitutes the only means by which. the locking plate may be raised to release the bobbin holder. Therefore before the bobbin holder may be removed from the instrument, the outer arm of lever 68 must be depressed. This causes the stud 69 to be carried downward and to bear against the cam plates, separating them and thereby moving the magnets apart. to release the wire. By the time the locking plate is raised sufficiently to unlock the bar 41, the magnets are far enough separated to permit the wire to be readily removed, this position being illustrated in Figs. 2 and 3. As soon as the bar 41 is withdrawn, a spring 71 which has a hook at its' lower end, catches under the inner arm of lever 68 and holds it in the last position. Thisposition is retained until a bobbin holder is replaced upon the instrument, when the bar 41 passing through the hole 46 in the locking plate strikes the spring 71 and releases it from the lever 68. Thereupon a sp ing 7 2 which is connected to thecam plates, draws the magnets and camyplates together;, causing the outer end oflevei-' 68 to rise/find allowing the locking plate to drop and engage the notch. in bar 41.- The lever projects near a'handle 73 by which the record holder 38 is grasped, so that at the same time that this handle is grasped, the lever may be engaged by the thumb of the operator and depressed. \Vhenever the magnets are freed from the wire they are restored to a position in which their pole pieces are parallel to the transverse plane ofthc instrument, by

means ofthe s )rin s 74 mounted n )on the stud 62 which embrace one of the magnetholding arms, as 58. Rotation of the magnet holder 48 about its pivot stud 65 is. resisted by a spring rod or wire 7 5 which passes through the cam plate 66-and has parallel legs embracing at their ends a stud 76 on the'magnet holder (Fig. 8), and

the holder 48 is compelled to partake of the movements of the holder 49 and be maintained in line therewith by spring rods 77 carried by the holder 49 and passing through a sleeve-78 on the holder 48. Movement of the magnets near enough to one another to press the pole pieces too firmly against the record wire is prevented by a cross bar 79 mounted so as to be vertically adjusted on a post 80, and arranged so that its'ends will been gaged was -..a..58 me 59 when the latter drawn together by spring 72..

When the magnets are: brought together to inclose a wire, the latter is positionedprop-' erly-with respect to the pole pieces by means ofifind'ers 82 and 83 carriedatjthe" epr ends of the magnet holders 48 and 9, and havingdiverging fingers. These finders i overlap one another, as shown in Fig. 7, and

the crotch between the fingers ends on the line of the notches 55 in'the pole pieces.

pairs of wire-holdingbobbms is connected. 15

From the foregoing it will be understood that when a holder .38 carrying one of the and locked to the bodyof the instrument, the record wire is properly engaged with the n1agnets,'and the bobbins engage with the disks 31 and 32 previously described frictionally, so that. they can be driven to feed the wire past the magnets.

The disk28 on the shaft ployed for forward driving during the recording and reproduction of the sound, and

the disk 29 is usedfor re-winding the wire previous to reproducing a record. To diminish the time of re- .winding, the drive drum 2'7 is'placed nearer to the center of disk 29 thanjthe'drum 26 is to the center of disk 30. The drums are also arranged on opposite sides of the centers of the disks,

that. is, theyarebetweenthe centers, so that while the drums both rotate in the. same direction, the disk will be driven in opposite directions 1 Thus the motor is enabled "without being 'itselfreversed indirection,

and there is no necessity for the additional circuits and relays which would have to be employed if the motor were to be reversed.

- 19-. 20, and the disks 22, 23.

- moved. Current being supplied .alte1'nately to the electro-magnets, causes the disks 28 and 29 to be alternately connected with the disks. These brakes consistof shoes 91 and 92 between the disks- 28 and 29 which bear" against the peripheriesthereof and are sup-.

e ported by pivoted arms-93 and .94. Be

, motor for forward'and reverse driving. I-

provide brakes for arresting the movement of the disks and wire-holding bobbins between the reversals thereof, and to hold .1

them stationary as-longas the clutches are not connected with either of the driving tween the brake shoes are toggle levers 915 96 to the knuckleof which is connected the Y r member of a second pair of toggle members 97 98.; This toggle exerts itsthrust i itjis in either ofits extreme of disk 31 is emwhich may be'engagedby a late to feed-the wire forward and rewind it I transversely to that ofthe toggle 95 96 and this knuckle is connected to the clutch shipper rod 85. The arrangement is such that when 1 the shipper is in .mid positi on,; as shown in Fig. 4, the brakes-are set,'.butwhen to connect either of the clutcl i g'the'to les are broken and the brakes released. y

suitable means, such as the springs 99,-bear-' ing on opposite sides of the tog le link 98, may be employed for returning e parts to mid-position when both of the electr0-mag-' nets are deene'rgizedji I also" rovide me- ,chanical means for shifting t e clutches. This consists of a bar 100 passin through the-stud on which the friction w eel 26 is loosely mounted,- and connected directly with the cone 24. This bar 100 passes through the end wall of the casing where it may be grasped and operated, and has a number of notches 101 in its upper edge hold it and the clutches in their extreme or mean positions. There is also an automatic contrivance jfor braking the wire bobbins when the latter are removed fromthe machine, an'dpreventing, the resiliency of the wire" from uncoiling it." This COQSIStS of a. spring plunger 103 contained in a tubular bracket 104 on the interior of the bobbin carrying frame 38, there bein one for each of the bobbins, and these p ungers being pressed toward the bobbins by springs 105. Each .of the tubular brackets has a lateral extension 106 to which is pivoted a lever 107 passing transversely through the shank of plunger .103. The levers from the two brackets extend toward one another, and their ends are engaged by the laterally extending arms or wings. 108 of a stop 10.9 which-projects from the socket 61. This engagement is effected whenever the bobbin holder is attached to the frame of the instrument so that when in this relation, the bobbins are released and are free to turn. But as soon as the bobbin holder is removed,

the brakes are applied to the bobbins and the.

with a worm wheel'112, thelatter driving a' spur gear 113 through a pinion 114. This gear carries a cam- 115 WhICh bearsupon the V,

arm-116 ofa bell-crank lever, the other. am

117 of which isattached' to a-slide 118 which -trai els upon atransverse guide rod 119 and" has a reye120 (Fig. 7) to receive the wire. A spring121-holds the arm 116 against the cam. T e construction of this mechanism is"- most clearly shownin Fig. 5, from whichitwill be seen that the cam .moves' thewireguiding eye outward a'nd'the spring draws it 115 during its winding upon the bobbins by the inward, the rate of movement being such as to lay the coils of the wire closely side by side without leaving spaces between them or allowing thefn'to over-ride. The wire-laying mechanism is all mounted upon the bobbin holder 38 so that it is removed from the.

telegraphone therewith and always is maintained in correct relation with the wire on the bobbins. One of the defects of the telegraphone as hitherto constructed is that in removing the bobbin from the apparatus the .wire must be disengaged from the laying or guiding mechanism, and its proper reengagelnent therewith can be effected only with difficulty. Consequently, in replacing a pair of bobbins in the machine, the wirelaying devices are frequently wrongly connected, and the convolutions 'of the wire caused to ride over each other. a

The apparatus here illustrated is duplex, having two sets of sound-recording devices, of which each is the duplicate of the other, and the description hereinbefore given of one set of such devices applies correspondingly to both, similar characters of reference being .applied in the drawings to both sets.

In addition to the tallying or registering device which is ordinarily connected directly to the bobbins by gearing more or less like thatwhich actuates the wire-laying mechanism, to show what proportion of the wire has been wound upon either bobbin, it is convenient 'to havea tally at a distance to indicate the same thing, and also show at what points particular parts of the record may be found, such as certain letters which may have been dictated. Such a tally is shown diagrammatically in Fig. 17, and designated by 122. It is operated electro-magnetica'lly in a separate circuit which contains the normally separated contacts 123 which are carried by the removable bobbin holder. -These contacts are engaged and brought together by the cam 115 in each of its rotations, so that for each double layer of wire wound [upon the bobbin, there is one actuation of the indicator of the tally;

The circuit which controls therecording magnets is illustrated diagrammatically in Fig. 12. Here there is shown a mouth-piece 124 in circuit with a battery 125 and a primary coil 126 of a transformer. A secondary coil 127 is in circuit with the windings of the recording magnets 50 and 52. When the switch 128 is closed and sound vibrations are directed into the mouth-piece 124, induced currents 'aresen't through the windings of the magnets, causing variations in the strength ofthe magnetic field through which the record wire passes, and thus magnetizing the latter in varying degrees, according to the character of the sound waves. These sounds are reproduced by closingthe switch 129 of another circuit, which is connected in parallel with the magnets and con- As illustrated in Fig. 17, the magnet cirrcuits are distinct from the circuit 131 of the motor, and also from the" circuits of the electro-magnets and the wire tally, and the circuits are also of a very simple character. All of these circuits have separated terminals which are so arranged that the circuits are. broken whenever the bobbin holder is removed from the body of the instrument,

but which are closed when the bobbin holder is placed in operative position. In an instrument adapted for two sets of bobbins, there are two separate talking and tallying circuits combinedwith a single motor, which, however, has two sets of separated terminals connected in the motor circuit in such a way that the circuit cannot be closed to drive the motor when both of the sets of record bobbins are removed, but can be so closed when either set is coupled to the instrument. In the motor circuit 131 there are connected in parallel two pairs of terminals 132 and 133,

the terminals of each pair being separate from one another. The bobbin holders carry coiiperating contacts, one of which is represented by 134 and the other by 135. These contacts. are either in one piece or more pieces electrically connected together, so as to bridge the gap between the terminals of each pair. Thus, when the holder carrying the contact 134 is in place, the contacts 132 are connected and the motor circuit is in condition to carry a current upon closingof the switch controlled by the operator. A simi-,

lar effect takes-place'when the bobbin holder carrying the contact 135 is in place, but whenboth contacts are removed, the motor cannot be operated.

Each magnet circuit terminates in contacts 136 which are separate from each other but are bridged by the complemental contacts 137 carried by the bobbin holders. Thus it is impossible to send a current through the magnets except when the bobbin holders are in place. The circuit for the tally also ends in separated terminals 138 and 139 with which are adapted to contact theterminals 140 141 of a circuit 142 carried by the hubbin holder in which are the contacts 123,

which, as shown in Fig. 17 are insulated. from each other and normally separated. When the bobbin holder is in place, the circuit 142 is connected with the tally circuit, and may be closed when the contacts 123 are brought together, as previously described. The character of the contacts is illustrated in Fig. 7, which shows an insulated bar 143 on which. these contacts-134 137 140 141 and any others which may be employed are mounted. These are simply sprang tongues which enter slots 144 in the.

wall 4.4 of the box and bear against the springs of which the contacts 132' 136 138 and 139 are made.

In Figs. 13 to 16, is illustrated a modified construction of recording magnet and holder therefor. The modification consists partly in a difference in shape of the arms which support the magnet, these arms being 158 and 159, respectively. The main difference, however, is in the construction of the ole pieces, these having lateral extensions w ich together form a tube 160 surrounding the record wire. Thedivision between 'theole pieces is a helicoidal surface which ena les 'ciency of the other parts. The motor may be removed bodily to be repaired or have an;

t of the other parts.

other one substituted, by simpl removing the end panel?) of the box- T e arrangement of the bevel gears 5 and 6 permits this to be done readily without deranging any Similarly, the electromagnets may also be made accessible by removing the panel at the-opposite end of the box, this panel carrying the magnets 89 and leaving the magnets 90 readily accessible.

I claim 1. In a telegraphone having bobbins upon which a recording element is wound, a motivemechanism comprising a motor of uniform speed and direction and means for transmitting the 'power of the motor to the bobbins, in combination with a panel or section of the containing box or frame, said detachable tomotor and said panel bein elng also relagether from the box and: tively separable.

2. a tele raphone, the combination of a motive me c amsm, forward and reverse dr1v1ng appllances n connection therewlth,

a single lever for operating the same,1recordmg-wire-holding bobbins, and mechanically operated brakes which'may' interrupt the ro-.

tationof the bobbins during the operation of said motive mechanism.

3. In a telegra hone, a motor, two wireholding bobbins 1n a'pa'ir, and a separate holder in which said bobbins are mounted,

said 'pair of bobbins constitutingav separately removable unit, and said separately removable unit being removable quickl and a.n; 1 b 1 1u i g the operation o the.

motor..

sounds, comprising motive mechanism, re-' 4. An instrument forrecordingarticulate frame and a pair of wire carrying bob rotatable on said frame bodily separable device for layin cording magnets, a wireholder includinga bms from the remainder of the instrument, and mechanical driving connections between said g otive mechanism and wire carrying bob- 5. An instrument for recordin articulate sounds, comprising motive mec anism, recording magnets having pole piecesgadapted to recelve between thema recording wire, a wire holder bodily separable from the .re-

mainder of the instrument, and a lock, preventing removal of the wireholder'u'ntil the said magnets havebeen disengagedfrom the wire.

6. An instrumentfor recording articulate sounds, comprising motive mechanism,-'recording magnets having pole pieces adapted.

to receive-between them a recording wire, and being movable apart to permit insertion and removal of the wire, a wire holder bodily separable from the remainder of the instrument, a lock for securing said holder motor mechanism, bobbins arra gedin. pairs,

and mechanical driving .connec IOIlS between said motor mechamsm and bObblIlS, with a smooth rows; said laying device being in constant relation to the wire and removable from the telegraphone jointly. with said wire, and without interference with the motive mechanism of the telegraphone.

wire on said bobbms 1n 8. An instrument 'for magneticallyi-recording sound vibrations, comprising motive mechanism, recording magnets, a removable bobbin holder, bobbins rotatably mounted therein and containing the record wire, means for transmitting rotary motion from the motive mechanism to'the'bobbins when the holderis inoperative relation to said mechanism, and wire-laying devices.

operated synchronously with the bobbins for laying the wire thereon in smooth rows, said devices being carried by the bobbin holder and maintained in correct relation with the wire. 9. instrument for magnetically recording sound vibrations, comprising motive mechanism,-recordin movable. bobbin holder, obbins rotatably .mounted therein and containing the record wire, means for transmitting rotary motion from the motivefmechanism to the bobbins when the operative relation to said mechanism,' a ;.w'ire, laying arm over magnets, a. re-.

tation of the bobbins for swinging said arms so as to lay the wire in smooth rows, said arms and gearing being mounted on the bobbin holder, whereby they remain in correct relation with the wire when the bobbins are removed from the instrument;

10. In a telegraphone, the combination of motor mechanism,bobbins in pairs, mechanically .operated braking mechanism, and

wire-laying devices in constant relationto said wire as wound on said bobbins, with an automatic braking device whereby said wire, when disconnected from the telegraphone, is prevented from uncoiling from its retaining bobbins through the holding power of said braking device upon said 7 bobbins.

11. In an instrument for magnetically recording sound, a separate bobbin holder, wire-containing bobbins or reels rotatably mounted in said holder, and spring-pressedfriction brakes arranged to bear against said bobbins when the holder is removed from the instrument.

12. In an instrument for magnetically recording sound, the combination with the main portion thereof, containing'the motor and recording devices, of a separate bobbin holder, wire-containing bobbins or reels rofor actuating them when the bobbin holder isin operative .relation with the main port1on, a shiftable clutch for transmitting motion exclusively to either of said disks, and

a brake operable simultaneously with the shifting of said clutch to stop the rotation of the disks between engagements of the clutch. j

14. Iii-an instrument for magnetically re cording sound, the combination with the main portion thereof having the motor and recording magnets, of a separate bobbin holder, wire-containing bobbins or'reels rotatably mounted in said holder, driving disks connectible with the several bobbins for actuating them when the bobbin holder is in operative relation with the main portion, a shiftable clutch for making said disks active alternately in opposite directions, and brakes arranged to bear on said disks and connected "withsaid clutch in such vmanner as to be engaged when the clutch is inactive, and released when the clutch is set to driveeither disk.

15. In an instrument for recording soun a main portion including 'a driving motor and sound recording devices, a separate carrier, a record eleme t, a holder therefor mounted rotatively in said carrier, the latter place said record element inoperative rcla-' tion with said recording devices, and a coupling automatically connecting said rotary holder with said driving motor when the carrier is connected to the main portion. 16. In an instrument for recording sound, a main portion including a driving motor and sound recording devices, a separate carrier, a record element, a holder therefor mounted rotatively in said carrier, the latter being connectible with the main portion to .place said record element in operative relation with said recording devices, reversible intermediate driving elements mounted in said main portion includingshifting clutch members actuated by said motor, whereby reversal may be effected while the motor rotates constantly in the same direction, and

being connectible with the main portion tomotion-transmitting members connectedrespectively with said holder and driving elements, engageable with one another when the carrier is connected with the main portion.

17 In an instrument for recording sound, a main portion including a driving motor andsound recording devices, aseparate carrier, a record element, .a holder therefor mounted rotatively in said carrier, the latter being connectible with the main portion to place said record element in operative reble intermediate driving elements mounted in said main portion including shifting clutch 'members actuated by said motor,

lation with said recording devices, reversiwhereby reversal may be effected while the motor rotates constantly in the same direction, motion-transmitting members connected respectively with said holder and driving elements, engageable' with one another when the carrier is connected with the main portion, and a brake mounted in the carrier arranged to engage and prevent rotation of the holder when the carrier is disconnected from the main portion and released when the carrier is connected thereto.

18. In an instrument for recording sound, a main portion including a driving motor and sound recordingdevices, a separate carrier, a record element, a holder therefor .mounted rotatively in said carrier, the latter being connectible with the main portion to place said record element in operative relation with said recording devices, reversible intermediate driving elements mounted in said main portion including shifting clutch members actuated by said motor, whereby reversal may be effected while the motor rotates constantly in the same direction, motiontransmitting members 'connected respectively with said holder. and driving elements, engageable with one another .when the carrier is connected with the, main portion, ai1d a brake operated siniultaneou'sly with said clutch for Stopping the movement of the driving elements and holder whenever the clutch efl'ect reversal'thereof; J

19. In an instrument for recording sound, a mam portion lncludlng a driving motor j and'soundrecording devices, a separate carrier, a record element, a holder therefor mounted rotatively 1n said carrier, the latter j being connectible with the'main portion to place said record element in operative relation with said recording devices, reversible intermediate driving elements mounted in said main portion including shifting clutch members actuated. by sa'id motor, whereby reversal maybe effected while the motor rotates constantly .in the same direction, mo-

tion-transmitting members connected. re-

spectively with said holder and driving elements, engageable with one anotherwhen the carrier is connected withthe main portion, and a brake operated simultaneously I with said clutch for stopping the movement of the driving'elements and record element holder'wh'enever the clutch is out of its motion-transmitting position.

2-0. Inga telegraphone, the combination of a constant-speed motive mechanism of uni form direction of rotation, and a braking device which operates without interrupting the rotation of the motor, with interchange- 40' i tion thereto -without interruption of said;

able pairs of wire-holding bobbins which may be quickly removed from said telegraphone' and similarly replaced in relamotor or said braking device.

- .21. In'a telegraphone, the combination of separately applied and interchangeable .bobbins in sets of two, each such set form ing a winding and unwinding unit with its wire-laying and wire-tallying devices in permanent connection therewith and -rela-" tion thereto, motive mechanism, a single member. operable to throw said bobbins out of or into engagement with said motive plane and connectible:alternately with the I motor by. the shifting of saidclutches so as mechanism in either forward or reverse direction, and brake shoes operable by said member to bring said bobbins to rest, dur

' ing an intermediate stage between two suc- -CSS1Ve engagements anlsm.

of the motive. mech- 22. In an instrument for a motor, driv ng clutches operated by said motor, a pair of "(lISkS arranged in one to rotate respectively in opposite directions, brake shoes between said disks adapted to bear on their peripheries, toggle links is shifted to recording sound,

between saidjshoes, adapted when in line to press the'shoes against the disks, a second pair of toggle links pivoted to the knuckle of the first said links and arranged to thrust transversely to the first links, and a clutch shifter connected to. the knuckle of said second pair of toggle links soarranged as to straighten the toggle when the clutch is out of engagement-and to break the toggle when set to drive either disk, whereby the' brakes'are set when the driveis disconnected, and released when either disk is driven.

23. In an instrument for recording sound,

a motor, driving clutches operated by said motor, a pair of disks arranged in one plane, friction drums bearing on the faces of the said disks on opposite sides of the centers of the latter and connectible a1- ternately with the motor by the shifting of said: clutches so as to drive the disks re spectively in opposite directions, brake shoes between said disks adapted to bear on their peripheries, toggle links between said shoes adapted when in line to press the shoes against the disks, 'a second pair of toggle'links pivoted to the knuckle of the.

first said links and arranged tothrust transversely to the first links, and aclutch shifter connected to the knuckle of said second pair of toggle links so arranged as to straighten the toggle when the-clutch is out of engagement and to break the toggle when set to drive either disk, whereby the brakes are set when the drive is disconnected, and

.ieleased when either disk is driven.

An instrument for recording sound, i

comprising a main frame, an electric motor mounted therein, sound-recording. devices also mounted on said frame, a removable frame connectiblefwith. the main frame, a

record element carried by said removable frame adapted to be placedin recording removable frame for closing said-. c1rcuit.'

25. An instrument for recording? sound, comprising a main frame an electrlcmotor mounted therein, sound-recording devices also mounted onsaid frame, a removable frame connectible with the main frame, a

record element carried by said removable frame adapted to be placed. in recording relation with said devices when the frames are connected, driving devices arranged to be put in connection with'th'e motor at the same. time, so asto feed said'element .past

the recordin 'devices contact' pieces coirnected with ifierent parts of the motor circuit and insulated from eachother, and-a bridge contact carried by the-removable frame-arranged to make contact with said electric motor, connections through which said motor drives the record-element holders when the frames are operatively connected together, an electric circuit for the motor, a plurality of pairs of terminals connected in parallel in said circuit and insulated from each other, and a contact carried by eachremovable frame adapted to connect one pair of terminals electrically when such frame is connected to the main frame, whereby the motor circuit may be completed when either removable frame is attached to the main frame, and is brokenwvhen none of the removable frames is so attached.

27. An instrument for magnetically recording sound, comprising a body, a set of recording electro-magnets mounted thereon, a frame or carrier, anda pair of bobbins or reels mounted .in said carrier and hearing a record wire, said frame or carrier being connectlble to and disconnectible from said body and the wire being operatively en- Y gageable with the magnets when the carrier is so connected.

28. An instrument for magnetically recording sound, comprising a body, a set of recording electro-magnets mounted thereon having opposed pole pieces arranged to em-' brace a record wire and magnetize the same in varying degree according to the fluctuating strength of the magnet, a-frame or carrier, and a pair of bobbins or reels mounted in said carrier and bearing a record wire, said frame or carrier being connectible to and disconnectible from said body and said magnets being separable, whereby the wire may be placed between said pole pieces {)vhile remaining undisturbed on the bob- 29. An instrument for magnetically recording sound, comprising a set of electro-magnets having pole pieces arranged toembrace a record wireand impart varying degrees of magnetization thereto, a pair of Wire carrying bobbins on which the wire is wound and between which it extends, and holders on which the magnets are mounted w1th provision for movement' ,apart so that they can be separated to permit insertion and removal of the "wire ina direction transverse to its length, said holders being swiveled to permit automatic adjustment of the magnets to accommodiate the varying angles'at which the Wire lies in the course of its transferrence from one bobbin to the other. r

30. In a telegraphone, the combination 0 'recording magnets and a pairof bobbins,- removable from the telegraphone without interruption of the motor or of the electrical circuit ofsaid magnets, with a swiveled'yoke or holder for said magnets by which said.

said bobbins takes place, and by which said magnets may be restored to proper relation to said wire when the operation of replacing said bobbins and Wire takes place.

31. In a telegraphone, the combination of recording magnets and a pair of bobbins, removable from the telegraphone without interruption of the motor or of the electrical circuit of said magnets, with a swiveled yoke or holder for said magnets by which said magnets are retained in proper relation to said wire when in use, and having a hinge permitting movement of the magnets away from said wire when the operation of removing said wire and said bobbins takes place, and by which said magnets may be restored to proper relation to said wire when the operation of replacing said bob-j bins and wire takes place; anddr'orked wirefinding fingers attached to said yoke beside the magnets and moving with its hinged members.

32. In a telegraphone, the combination of motive mechanism, removable bobbins, said bobbins being arranged in pairs, a control ling shaft for connecting said bobbins to said motive mechanism, disconnecting them therefrom, reversing the direction of said bobbins, and applying brakes to said bobbin members at the proper time, wire-laying demagnets having =pole pieces arranged to em-- brace a record wire and impart varying degrees of magnetization thereto, pivoted holders on which the magnets are mounted so that they can be separated to permit insertion and removal of the wire in a direction transverseto' its length, a separate bobbin holder, Wire-car'rying bobbins mounted on said holder, and capable of being placed so that the wire may extend between the poles of the magnets, and means carried by said bobbin holder whereby to separate said magnet holders and permit removal of the Cit tion transverse to its length, plates attached wire from the magnets without altering its position on the bobbins. A

34. An instrument for magnetically recording sound, comprising a set of electromagnets having pole pieces arranged to embrace a record wire and impart varying degrees of magnetization thereto, pivoted holders on which the magnets are mounted so that they can be separated to permit insertion and removal of the wire in a directo 'the respective holders having converging surfaces, a separate bobbin holder, wire.- carrying bobbins mounted on said holder,

and capable of beingplaced so that the wire may extend between the poles of "the magnets, and a lever mounted "on said bobbin holder and having a stud entering the V- shaped 'space between said plates, by ma-' vnipulation of which the magnets may be separated and .the wire inserted and removed without altering its positionon the bobbins. In a telegraphone, the combination of bobbins, a record element wound on said bobbins, a recording magnet past which said element is led, With a tallying indicator showing the proportion of the element 1 wound on each bobbin, located preferably at a distance from the box and contact members carriedand operated. by said bobbins for electrically actuating said tallying indi- -.cator.

86. A telegraphone comprising, in combination, a'motive mechanism, a holder therefor, a separate bobbin carrier, bobbins mounted rotatably on said carrier, means for detachably fastening the bobbin carrier tosaid holder, cooperating driving elements connected to the motive'mechanism, and bobbins respectively arranged to connect when the carrier is secured to the holder, whereby the bobbins are driven, an electro-magnetic sound recording device arranged' adjacent to v the wire wound on the bobbins for magnetizing the same, a-telephone circuit in circuit with said sound recording device and having switch contacts in saidholder, and a complemental contact or switch on the car- -rect relation to the drums and wire.

bins, a tallying device and cooperative contacts in the electrical circuit of said tallying device arranged to be brought into contact periodically by said'wire-laying mechanism to cause registering ofthe length of wire used.

38. The comb1nat1on,. 111 an lnstrument for magnetically recording sound, ofv recording magnets, a' record wire, a pair of bobbins or winding drums on which said Wire is wound, an independent holder for said drums, means for securing said holder with the stretch of wire betweenthe drums in operative relation with said magnets, and wire guiding mechanism for laying the convolutions of the-wire in regular order on the drums, said mechanism being always in cor- 39. The combination, in an instrument for magnetically recording sound, of recording magnets, a record wire, a pair of'bobbins or winding drums on which said wire is wound, an independent holder for said drums, means for securing said holder with the stretch of wire between the drums in operative relation with said magnets, and-wire guiding mechanism for laying the convolutions of the wire in regular order on the drums, said mechanism being mounted on said holder and thereby kept in correct relation to the drums and wire whether the holder-is removed from or in operative relation with the instrument.

In testimony whereof I have afiixed-v my signature, in presence of two witnesses.

Witnesses-r v ARTHUR H; BROWN," P. W. Pnzzsm.

JOHN C. SHERMAN.

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