US934843A

US934843A - Telegraphone.

Info

Publication number: US934843A
Application number: US42582508A
Authority: US
Inventors: Frederic Schaefer
Original assignee: AMERICAN TELEGRAPHONE Co
Current assignee: AMERICAN TELEGRAPHONE Co
Priority date: 1908-04-08
Filing date: 1908-04-08
Publication date: 1909-09-21
Anticipated expiration: 1926-09-21

Description

F. SGHAEFER.

TELEGRAPHONB. APPLIGATION FILED uns, 1908.

Patented Sept. 21, 1.909.

5 SHEETS-SHEET 1.

Annnsw. s. Gamm co. ramo-uwoamvnsas. wumemn. u c.

F. SGHAEFER.

TELEGRAPHONE.

APPLICATION FILED APR. a, 190s.

Patented Sept. 2l, 1909.

5 SHEETS-SHEET 2.

WM uw maw. s. GRAHAM co., rHoTc-LUMOGRAPHERS. wAswmGToN, D. c.

F. SCHAEER.

TELBGRAPHONE.

APPLICATION FILED APB.. 8 190B- 934,843. Patented Sept. 21, 1909.

5 SHEETS-SHEET 3.

me J SWW@ F. SGHABFER.

TBLEGRAPHGNE.

APPLICATION FILED APR. s. 1908.

5 SHEETS-SHEET 4.

Patented s611921, 1909.

iff/weones :J/ QM ANDREW. av Gamm co. umn-Llwoempnsns. wAsmNGTaN. n. c.

F. SGHAEFER.

, TELEGRAPHONE.

'APPLICATION FILED APR. a. 1908.

` Patented Sept. 21, 1909.

5 SHEETS-SHEET 5.

lru l l QZ; ma Sito/awa i! i.- A

Clt

UNITED STATES PATENT OFFICE.

FREDERIC SGHAEFER, OF WHEELING, WEST VIRGINIA, ASSIGNOR TO AIVIERICAN TELEGRAPHONE COMPANY, A CORPORATION OF THE DISTRICT OF COLUIVIBIA.

TELEGRAPHONE.

To all woo-m it may concern:

Be it known that l, Eiznonnic Soiiaiirnn, a citizen ot the if'uited States, residing' at Wheeling in the county of Ohio and State ot' llleit Virginia, have invented certain new and use't'ul linprovenieuts in Telegrai'ihones, ot which the followingis a full, clear, and exact description.

My invention relates to telegraphones and has ior its obj ect the provision of a niachine in which the record inediuni is in the forin ot' a disk rotatively supported and is par ticularly adapted tor connnercial work of various kinds such as the dictation and transcribing ot' letters, etc.

My invention comprises various improveinents in the ineans tor supporting` and rotating' the disk, ineans for supporting and inoving the magnets with respect to the disk, ineans for connecting and disconnecting the drivingi ineans with the disk support and with feed screw by which the carriage is inoved, and various details ot' construction as will he tully sety forth and claimed.

In order that the invention niay be inore fully understood, reference is hereby inade to the accompanying drawing, oi which- Eigure 1 a plan view ol the improved telegraphoue. 191g, 2 is a front elevation ot the saine, the supporting` cabinet being shown in section. Eig. 3 is an end elevation ot' the saine, also showing the cabinet in section. Eig. el is a plan view ot the body or bed plate with certain of the operating parts, the carriage being' removed theret'ron'i. Fig. 5 a plan view o the traveling carriage upon which the Aiagnets are supported. Eig'. o is a section on lino 6 6 ot' Fig. 5. Fig'. 7 is a central vertical section of the means 'for rotatively supporting the record disk. S is a plan view ot the table to which the said disk is applied and showing the inovable spring,l arinsfor clamping the disk upon the said table, said arins being shown in their extended or clamping` position. Fig. 9 is a plan view ot' the saine with the arnis retracted so as to perni it a disk to be applied to or i'einoved troni the said table. Fig. 10 is a bottoni plan view ot the knob used .tor securing the said spring arins in position. and the gear for operating said arins. Figi'. 11 a plan view ot the support secured to the traveling carriage and Carrying the magnets which operate uponv the upper surface of the record disk. Eig. 12

Specification of Letters Patent.

Application filed April 8, 1908.

Patented Sept. 2t, 1909.

Serial No. 425.825.

is a side elevation ot' said support and also ot the corresponding support. tor the inagncts which operate upon the lower surface ot the disk. Fig. 113 is an end elevation of the lower magnets and support of Fig. 1;). Eig. 14@ is a detail plan view ot the block to which the magnets are applied. Fig. 15 is a detail section oit said block, showing the magnets applied thereto and the traine in which said block is supported, the bottoin plate being oinitted. Figs. 16 and 17 are a side elevation and bottoni plan view, respectively, of a i'nodii'ied construction in which the inagnet block is provided with feet or supports which rest upon the record disk to minimize the wear upon the pole pieces of the magnet, and with wiping pads to reinove dustfrom the disk. Fig. 1S is an enlarged sectional detail of the lower end ot the pole piece with the jewel or supporting toot applied thereto and ot' special construction.

In all the views corresponding parts are designated by the saine reference numerals.

ln the structure illustrated 1 is a cabinet, preferably of wood, within which is situated the inotor 2 for driving the inachine or instrument and the set of batteries 3 for turnishingl current for the magnets which are carried by the traveling carriage. The bed plate ,Je rests upon said cabinet and supports the various operating parts, with the eX- ception of the inotor 2 and its governor 5. This inotor niay be ot any desired type, but I prefer to use an electric inotor driven from any suitable source of current. the gov ernor 5 being mounted directly upon the arniature shaft or' the inc-tor and comprising the. series otl centrifuoal weights G ysecured to the central portions ot' the. springs T, the latter being` secured at one end to a collar 8 tixed on the niotor shaft and secured at their opposite ends to a sleeve 9 slidable upon said shaft and lrovided with a friction disk 1t). There is also a sleeve 11 torined with an integral arin 12 which carries at its extremity a pad 13 ot' felt or other suitable material situated in such position as to be friction ally engaged by the disk 10 in order to regulate the speed of the inotor shaft. The sleeve 11 is slidable upon a pin 14 sei-,ured to the traine, of the inotor 2 and surrounded by a coil spring 15 which bears at ends against said inotor traine and said sleeve. re-

spectively, and presses the latter againstr the end of an adjusting screw 16 threaded in the bed plate 4 and provided with a circular notched head 17 for convenience in turir ing. lVhen the screw 16 is turned so as to move the same downwardly, it will cause the sleeve 11, arm 12, and pad 13 to move downward and thereby permit of increase in the speed of the motor shaft, and conversely an upward movement of the screw 16 will cause the motor to rotate at a lower speed. The upper surface 1S of the sleeve 11 is of suliicient extent to provide an abutment for the end of the screw 16 in any position of lateral adjustment of the motor 2 for the purpose of tightening the driving belt 19 which passes over the drive pulley 20 mounted on the motor shaft, and the pulley 21 which is mounted upon a bearing concentric with the vertical spindle 22 and which will be described later. The lateral adjustment referred to is obtained by supporting the motor 2 by means of screws 23 (see Figs. 2 and 3), said screws being threaded in the upright 24 which is bolted to the bottom of the cabinet 1, the washers 25 upon said screws engaging the flanges 26 which are in` tegral with the motor frame and are provided with notches 27 through which the said screws 23 pass. In previous construe` tions, the motor has been mounted with its shaft horizontal or at right angles to the spindle carrying the disk. This necessitates a turn in the driving belt and a special belt tightener and other complications which the present arrangement avoids.

The means for supporting and rotating the record disk comprise the vertical spindle which is supported on a ball bearing of which the cup 2S is secured to said spindle, and the cone 29 is carried by the bed plate 4 and which also carries the cup 30 of a second ball bearing whose cooperating part 31 is carried by the pulley 21. Secured within the bore of this pulley is another bearing cup 32 which cooperates with the cone secured to the spindle 22 to form a ball bearing, and the last mentioned bearing serves, not only to support the pulley 21 upon the spindle 22, but to support the spindle itself with respect to the bed plate 4, the adjustment of the cone serving to take up wear in each of the three ball bearings. Thus three sets of balls are made to furnish the bearings for two rotating elements, the sindle and the pulley, which ordinarily would require four. Locking nuts 34 are provided for securing the cone 33 in position.

The rim of the bearing cup is formed with a series of teeth which are adapted to be engaged by the teeth of a movable clutch member 36. said clutch member being slidable upon the spindle 22 and keyed thereto by a feather 37. A groove 33 is formed in said clutch member to receive the pins 39 which project inward from the arms of the operating yoke lever 40, said lever being pivoted at 41 to a lug or ear carried by the arm 42 which is secured to and depends from the bed plate 4. The lever 4() carries at its end a pin 43 which engages a slot 44 formed.

in the end of the link The other end of this link is pivoted at 46 to the end of one arm of the T-shaped lever 47 which is pivoted on a screw 4S threaded on the arm 42. There is another lever 49 pivoted on the screw 50 also threaded in the arm 42, and said lever is provided with a slot 51 which receives a pin 52 carried at the end of one of the arms of the lever 47. The levers 47 and 49 are connected by a tension spring 53 the ends of which are secured, respectively, to the pins 54 and 55, whereby the said spring tends to draw said pins together and to rotate said levers 47 and 49 about their axes in either direction after said pins 54 and pass the line connecting the axes of said levers. riihere is a stop for limiting the movement of said levers in one direction, in the form of a screw 56 threaded in a lug 57 integral with the arm 42 and held by a jamnut 58, said screw abutting against a lug 59 integral with the lever 49. The movement of the levers 47 and 49 into the opposite 'po sition or the position in which the spring 53 is on the other side of the line connecting the axes of said levers from that which it occupies in Fig. 2, is effected in a manner hereinafter described, to cause the engagement of the lower face of the clutch member 36`with a friction disk or ring 60 rigid with the extremity of the arm 42 and which acts as a brake upon said clutch member and therefore upon the spindle 22 when engaged by said clutch member.

The upper end of the vertical spindle 22 is provided with a table 61 which is secured thereto by a pin 62 and is provided with a shoulder 63 the diameter of which is equal to the diameter of the central opening formed in the record disk 64 of suitable material for receiving a telegraphone record, hard steel being preferably used. There is a vertical pin 65 projecting from the table 61 and adapted to engage a notch or hole formed in the said disk in order to transmit the driving torque thereto. Means are provided for pressing or clamping the disk upon the table 61, consisting of a plurality of spring arms 66 pivoted at one endY upon pins 67 rigid with the table 61, said arms resting upon washers 68 which surround said pins. Each of the arms 66 is provided with a segmental rack 69, the teeth of which mesh with a spur gear 7 O secured to a knob 71 which is journaled on the upper end of the spindle 22 and secured against removal by the jam-nuts 72. The ends of the spring arms 66 are depressed, as shown, and, when the said arms are in the position shown in Fig. S, their extremities press downward upon the surface of the disk 61, thereby clamping the same upon the table 61, the movement of said arms being limited by the pin (35. 1t is evident that a rotary movement of the knob 71 and gear 70 causes the spring arms 60 to be retracted into the position shown in Fig. 9, the space between the lower surface of the knob 71 and the upper surface of theI table 61 being sufficient to allow the spring arms to be housed therein. This retraction of the spring arms permits the disk G4 to be removed from the table o1 since the internal diameter of the central opening is slightly greater than the greatest diameter of the knob 71, so that all that is necessary, in order to remove the disk (5f-1 from the table ('31, is to rotate the knob 71 through a small angle in order to retract the spring arms 66, and the disk may then be removed from its support and a new disk applied thereto and secured by turning the knob 71 in a reverse direction so as to extend the spring arms GG into clamping position.

Upon the upper portion of the spindle and below the table (S1 is ixed a worm 73 which engages a worm gear 7st carried by a sleeve 75 loosely mounted on a horizontal shaft 76 which is formed with a feed screw 77. This shaft is mounted on centers 78 carried by the brackets 7 9 secured to the upper surface of the bed plate i. The sleeve 75 is provided with teeth S0 adapted to engage similar teeth formed on the clutch member 81 which is slidable upon the shaft 77 and adapted to drive the same through a spline S2.

The clutch member S1 is formed with a pair of collars 83 between which extends a pin S4; which extends upward from the end of a lever S5 secured to the upper end of a rock shaft- SG, and to the lower end of said shaft is secured a lever arm 87 which is pivoted at 88 to the end of an operating` rod S9 w lich may be controlled in any desired manner, but which is shown as being pneumatically operated, being connected to the piston of an air cylinder 90 and adapted to be operated by an air bulb 91 in oney direction, and by a spring in the cylinder in the other direction. There is another arm 92 secured to the rock shaft S6 in such position to engage` the end of a spring which carries an electrical contact 91 adapted to engage a similar contact carried by a spring 90, said springs being electrically connected to wires 97 and 9S, which wires form a part of the circuit of wires used in carrying the voice currents to the recording magnets and, in reproducing, carry the voice currents which are generated in said magnets so that an angular movement of the rock shaft 86 caused by the operating rod 89 simultaneously moves the clutch member S1, thereby releasing the shaft 70 from driving relation with the sleeve 75 and opening' the circuit which includes the recording or reproducing magnets. These magnets are carried by a traveling carriage 99 which is preferably in the form of a hollow rectangle, as shown in Fig. 5, one end of which is formed with an integral arm 100 extending upward from the plane of the body of said carriage and inward toward the center thereof, the disk, when mounted, standing between the arm and the main portion of the frame. This carriage is formed with front and rea-r longitudinal ways 101 and 102, respectively. 1l pon the bed plate l is formed a way 103 extending parallel to 101 and, at the rear of the bed plate, is a strip 10st which is formed with a. way 105, said strip being adjustable toward the carriage by means of adjusting screws 100 provided with jam-nuts 107, said screws being threaded in lugs 108 projecting upward from the bed plate 4E, said strip 101 being held against longitudinal movement by notches 109 formed in the lower surface thereof and engaging ribs 110 formed on the bed plate. Between the ways 101 and 10b are two steel balls 111, and between the

ways

102 and 105 is a single ball 112, which balls receive the weightof the carriage 99 and allow the same to travel longitudinally with respect to the bed plate with a minimum amount of friction. rfhe adjustment of the strip 10st provides for the elimination of any looseness between the ways and the roller supports, and the use of three balls insures even support of the carriage at all times. r1`here is a lug 111 extending inward from the rear of the carriage 99, and secured thereto by screws 112 is a block 113 having a bearing 111, and there is another bearing 115 formed at the end of the carriage 99, and within said bearings journaled a horizontal rock shaft 11G upon the outer end of which is fixed an arm 117 having an enlarged end 11S adapted to be pressed by the thumb or finger of the operator, the downward movement of the same being limited by an ear 119 formed as an integral extension of one corner of the carriage 99, said ear also acting as a handle by which to move the carriage by hand. lpon the inner end of the shaft 110 is a securing nut 120, and adjacent the bearing 114 is an arm 121 which is rigid with said rod 110. rEhe forward end of said arm is provided with a segmental nut 122 which is held in engagement with the thread of the feed screw 77 by a tension spring 12B one end of which (see Fig. is secured to the carriage 99, and the other end of which is secured to the ear 124 formed integral with the arm 121. 1t is evident that, upon depressing the end 11S of the lever 117, the

feed nut will be moved out of engagement with the feed screw, and the carriage 99 can then be moved by hand either to the right or left throughout its full range of movement, and, upon releasing the arm 117, the spring 123 will cause the arm 121 to be restored to its initial position with the feed nut in engagement with the feed screw.

The forward edge of the carriage 99 is provided with graduations forming a scale 125, and there is an index or pointer 126 secured to the bed plate 4 in proper position to coperate with the graduations of said scale in order to indicate the position of the magnets with respect to the record surface. Vhen the carriage is at its extreme left-hand position the pointer 126 will be opposite the first mark on the scale 125 (see Fig. 1) and the magnet below the disk will be at its extreme edge and in proper position for starting to record upon the disk, the magnet above the disk being near the center thereof and also in proper position for starting to record. 1t should be noted that the disk, the outline of which is shown in dotted lines in Fig. 1, is of sufficient size to cover almost the entire extent of the carriage 99 and that the scale which is carried by the said carriage is, for the most part, below the said disk, but, as the carriage travels toward the right in making a record, the scale moves with it, and the portion which is opposite the pointer 126 will always be visible so that a reading may be taken at any time.

There are two recording` magnets 127 and 128, respectively, and associated with each is an obliterating

magnet

129 and 130, respectively, one setof magnets being situated above the disk 64 so as to operate upon the upper surface thereof, and the other set being located below the said disk so as to operate upon the lower surface thereof. The advantage of using two magnets for recording or reproducing in connection with a record in the form of a rotary disk is that the disk may be caused to rotate at a uniform speed and, by causing one of the magnets to move from a faster moving part to a slower moving part of the disk and the other magnet from a slower to a faster moving part, the sum total of the magnetic effects produced by the magnets or the electrical effects produced in their circuits by the magnetism of the disk is constant, because, as the speed of the record surface upon which one of the magnets is operating diminishes, the speed of the surface upon which the other magnet is operating increases at the same rate, so that the sum of the effects of the two magnets is always the same, and greater than the effect of either magnet acting alone at any time.

1t has been proposed heretofore in Patent No. 893,277, granted July 14, 1908 to Harve R.

Stuart, to obtain this advantage by mounting the two magnets upon separate carriages traveling simultaneously in opposite directions, but 1 have found that the same advantage can be obtained by supporting both magnets upon a single carriage in such positions that one of the magnets starts at t-he edge of the disk and travels toward its center and the other magnet starts from a point near the center and travels toward the edge of the disk along a radius which is removed 180 degrees from the radius along which the first magnet moves, so that I am enabled to obtain exactly the same effect as would be obtained by the use of two carriages traveling in opposite directions simultaneously, with the magnets moving along the same radial line, but with only a single carriage.

The construction of magnets is as follows: There is a supporting frame 131, preferably of hard rubber', within which is set a block 132 of the same material. Tightly fitted within the latter is a pair of spool centersv 133 upon which are placed the spools or coils 134. The spool centers 133 are drilled to receive the

magnet cores

135 and 136. These cores are of wrought iron, and there is a spring plate 137 which is secured at its center to a supporting plate 138 and presses at c its ends against the upper ends of the

cores

135 and 136, the opposite ends or pole pieces of the cores being adapted to contact with the record disk. The supporting plate 138 is provided with a pair of curved slots 139 through which pass the screws 140 for securing said plate to the block 132. Said connection provides a slight angular adjustment of the said block with respect to said plate around the centers thereof, whereby the pole pieces may be set exactly the same distance from the axis of the record disk, whereby they will trace the same path upon the surface. The plate 138 is provided with a pair of downwardly extending ears 141, and the lower extremities thereof are pivotally connected to the frame 142 by means of adjustable centering screws 143. These screws provide an adjustment by which the distance of the pole piece supporting block 132 from the axis of the record disk can be slightly varied, whereby the path traced by one recording magnet can be accurately determined or may be caused not to register with the path traced by the other recording magnet, if desired. The frame 142 is pivoted upon a pair of oppositely disposed centering screws 144 threaded in the frame 145, and the latter is rigidly secured to the arm 100 of the traveling carriage 99 byV screws 146. There is a tension spring 147 secured at one end to the frame 145 by a screw 148 and, at the other end, to an arm 149 which is integral with the frame 142. This spring therefore tends to turn the frame 142 on its pivot,

thereby pressing the pole pieces of the map*- nets against the surtace ot'the record diskj the said spring` allowii o' the trame 142 to move up and down in order to accommodate itseli2 to any irregularity which might be present in the shape ot the disk. Eis the ccnter ot gravity ot the magnets and their supportinf l black above the centering' screws la??rr i provide a link 15( one end oi'' which phiotally secured at 151 to one oi the cars 1li. and the other end is formed with an opening ot somewhat greater diameter' than the piu or screw 15 which passes through id opening' and is rigid with the trame 11:5. rthis link tlieretorc prevents the magnet trom turning over when it raised troni the disk.

The magnets which operate upon the lower surface ot the record disk are exactly similar to the upper magnets, and the supporting means therefor is exactly the same, except that the link 150 is omitted since the center ot gravity ot the lower magnet is below its centering` screws.

The lower magnet and its support is clearly shown in Figs. 12 and 137 which views also illustrate a screw 154 which is threaded in the frame 1&5 and serves as a stop for limiting the pivotal movement of the trame let-2 by engagement oli an extension thereof, as shown. By removing screw the magnet can be swung upward sufiiciently to turn it upside down to facilitate the renewal ot the magnet cores. The trame 1l?) which ai-ries the lower magnet is secured to the carriage 99 by screws 155 (sce Fig. 1). The block 132 which carries the magnets (sce Fig. let) is provided with horizontal channels 15G. and the wires 15T which are electricallyY connected to the windings ot' the magnet coils occupy said channels. Said wires are tlexible and their outer ends are provided with lugs 15S which are secured to the binding` posts 159 carried by an insulatinpl block 16() secured to the frame 145. This arrangement oit the wires 158 allows `greater tlexiliiility in the pivotal movement ot the magnet support 132 about the centering screws 14.2% than any other arrangement which 1 have been able to devise. From the bindingl posts ot' the upper frame 145, the conducting' wires lead along;l the hollow underside ot the arm 10() ot the ciu-riapre and thence alongl a groove1 205 (Fig. tl) in the trout member ot the carriage and `finally join the wires trom the lower trame 145 to torni a cable 206 (Fig. llhis cable 'passes through a slot 20T at'ter which the individual wires lead to the batteryr` telcphonic ii'istruments and switches. The slot 20T permits the cable to move freely with the carriage without derangement.

ln 1G and 1T, a modification in the construction ot the magnet trame is shown.

t each end of the trame, pockets 200 are formed in which are placed wiping pads 201 adapted to rest upon the surface of the record disk and to clean said surface of any dust or foreign matter that .may be thereon. These pads may be pressed toward the disk by springs placed above them in the pockets, or any suitable adjusting,` deviccs may be used to hold them in etlective workin;l )osition. These figures also illustrate support4 ing feet 202 in the torni ot jewels which are set in suitable sockets in the bottom plate oli the magnet trame. These jewels are iixed at such a level that they will receive the larger part of the wear due to the pressure of the magnet trame against the disk, and at the same time permit the pole pieces ot the mag'- nets to make adequate contact with the disk withoutunduly .vearing them. These jewels may be located at any suitable points on the frame to evenly support it.

1n Fig. 18, the jewel is shown in the t'oim ot a collar surrounding' the pole piece, the view being enlarged to show the :toi-mation otl the jewel in which a cavity or annular space is attorded immediately around the extremity of the pole piece. This cavity, indicated by 203, formed in the jewel 204e, receives any dust or 'foreign matter that may get between the surface ot the pole and the disk. and become scraped olf into the cavity. It the jewel did notl have this cavity, but hanged the pole closely, there would be less escape tor foreign particles. with the result that they would be retained under the pole piece and interfere with the proper magnetic action.

A small plate 161 is provided (see Figs. 1 and 2) which is formed with a slot 162 and a depending arm which carries a roller 163. This plate is secured to the carriage 9i) by the screws itil which permit a longitudinal adjustment ot the said plate. T he roller 14.33 is so situated as to strike the arm 163 formed on the pivoted plate 1l), during` the forward movement ot the carriage. and to strike againstthe arm 166 during` the return cf the carriage in order to restore the plate 49 to its initial position. The latter arm extends rearward t'rom the body ot' the plate 4,9 so as to be situated below the longitudinal flange or rib 16T (F 3) which depends from the arriage 9). This rib prevents the pivotal movement ol the plate el) except when the carriage is in such position that the arm 166 is below that portion ot the carriage where the said rib 16T is cut away. as .shown at 16H in lig. 2. 'Therefore the plate Si cannot be moved to throw the clutch member 36 until the carriage is near its cxtreme righthand position. T he movement ot' the carriage to the right is limited by the engagement of the cross member 169, of the carriage, with the head oi the casting` which secured to the bed plate by said screws in direction. Said frame therefore rides upon surrotmds the spindle 22 (see Fig. 7), and t the movement of the carriage in the opposite direction is limited by the engagement of the end ofthe carriage with a lug 170 formed integral with the bed plate e.

The carriage travels a sucient distance to the right (Fig. 1) to enable the upper magnets to pass beyond the surface of the record disk 6% and, in order to support the magnets and prevent the pivotal frame 142 from being depressed by the spring 14:7 when in this position, means are provided for sup-. porting the said magnets in this position, which means, as shown, consist of a roller 171 (Figs. 2 and 3) mounted on the upper end of a rod 172, said rod being clamped to the bed plate 4 by a pair of nuts 17 3 and 174 threaded upon said rod. Obviously, the rod 172 may be adjusted longitudinally and any desired position of adjustment. The roller 171 is so situated as to engage the lower surface of the frame 142 (see Figs. 8 and 12) as the carriage is fed in a forward the roller and the magnets are thereby prevented from dropping below the level of the disk. This construction therefore provides a support for the magnets when in this position and allows the disk to be removed from its support and be readily replaced by another disk, after which the carriage may be moved to its extreme left-hand position, which is the position which it occupies at the beginning of a record.

1n order to afford an audible signal when the magnets are approaching the end of the record, a bell 175 is provided, the same being secured to the bed plate L1- and there is a hammer 17 6 which is pivoted at 177. A tension spring 17 8 is connected at one end to the base 179 of the bell and, at the other end, to the hammer 176, and the operating lever 180 is also pivoted upon the pin 177 and its forward end extends into the path of the projection 181 which is integral with the carriage 99 so that a movement of the carriage toward the right causes the long arm of the lever 180 to be moved toward the right and the short arm toward the left, which causes the pin 182 to press against the hammer 176 and turn it on its pivot, thereby raising the spring 178 under tension and, as soon as the projection 181 passes the lever 180, the spring 17 8 thrusts -the hammer against the bell and sounds the same. Upon the return of the carriage the projection 181 moves the long arm of the lever 180 toward the left but does not alter the position of the hammer 17 6 and, as soon as the projection 181 clears the lever 180, the spring 183, which connects the lever 180 with the hammer 176, restores the lever to its normal po sition.

The operation of the instrument is briey as follows The record disk is; appiedeto the rotary table 61 and the traveling carriage is brought to the position shown in Eig. 1, this being the eXtreme left-hand position of the said carriage. 1n this position the lower magnets are immediately below the outer edge of the disk and the upper magnets are as close to the center of the disk as will be effective. The motor 2 having been started, movement is imparted to the driving belt 19 and pulley 21, which, by its rotation, drives the clutch member 86 and, through it, the vertical spindle 22, table 61, and the record disk 64;. The worm 7 3 imparts rotation to the gear 7e and sleeve 75, and the latter, through the clutch member 81, rotates the feed-screw 77 and thereby imparts a progressive movement at uniform speed to the carriage 99. 1f therefore at this time voice currents be applied to the magnets, a magnetic record in the form of a spiral of decreasing diameter will be made by the lower recording magnet, and a separate record in the form of a spiral of increasing diameter will be' made by the upper recording magnet, said magnetic records being similar to each other but consisting of magnetic impressions ditferently spaced on account of the record surface operated upon by the two magnets, traveling at difl'erent speeds. These effects, however, can be added together when the records are reproduced, by connecting the reproducing magnets either in multiple or in series with each other or by connecting them in separate circuits connected with separate receivers, one of which may be applied to each ear of the listener. 1f at any time the person using' the instrument wishes to stop the feed of the carriage 99, as when he is pausing to collect his thoughts or prepare for further dictation, all that is necessary to do is to press the bulb 91, thereby operating the rod 89 and arms 87, 92, and 85, and thereby throwing the clutch member 81 out of engagement with the driving sleeve 80, thereby stopping the rotation of the feed screw 77 and simultane-V ously opening the circuits which include the magnets of the machine. Upon releasing the bulb 91 the clutch 81 will be restored to its former position by the spring in the air lcauses the upper magnet to be raised from the surface of the disk by reason of the eneerste gagement ot the traine li/lQ with the roller 171. During the period when the upper i magnet is raised, however, the lower magnet is still in operative relation with the sur- S tace of the disk and may be used tor recording the finishing Words ot a sentence, although the record produced Will he fainter than that which is produced as the resultant of the tWo magnets. Finally, the roller 163, which is in the path ot' the arm 165 of the pivotal plate e9, presses against the same and moves the latter to a sutticient extent to enable the spring 53 to throiv the plate 49 in such a Way as to throiv the lever Ll to move the clutch member 36 out ot engagement With the driving` pulley 21 and apply the same to the friction brake n0. rfhis removes the driving iovver from the vertical spindle practically simultaneously brakes the saine, and brings the said spindle to rest almost instantly, the motor 2 continuing to revolve and the pulley 21 rotating as an idler. rl`he record disk and supporting table being noiv at rest, the disk may be removed and replaced hy another disk;

The lever l 11T is then depressed by pressing ivith the linger or thumb upon its extension 118, whereby the feed nut 122 is moved out ot carriage may then be moved very readily to its initial or extreme lett-hand position, which nmvement, by reason ol'V the engages ment ot the roller i615 vvith the arm Vii/3G ot the pivotal plate #l-Q, restores the latter to its initial position, as shovvn in Fig. 2, and thereby operates the link and lever d() and moves the clutch member 3o from engagement With the braking ring 6U and into engagement with the clutch member ot' the drive pulley i1 so that the instrument is in position tor starting a neiv record.

The operation ot reproducing is carried on in a manner similar to that ot' recording,

the only,Y ditlierence boing in the ivell knoivn change ot connection bv which the magnets used tor recording are converted into regroducing magnets and the obliterating magnets l ung cut out ot circuit so as not to ctl'ace the record.

llt will be seen that in this machine. the disk ma)Y continue to run during the time that it is in use. and tl at it is stopped only to remove and replace it. During the operations ot recording` and reproducing, in the intervals vvhen speech is not delivered, or when the record is not listened to, the radial feeding movement ol' the magnets is the only movement that stopped. ln this way, the normal speed oiti the disk is in stantly available the moment the leed ot the magnets is renewed. and etiective recording and reproduction is assured over the entire availaljile surface ot the disk. ln machines Where either the motor or the disk, or both. are stopped and started at intervals during the recording or regroducing oiiierations, time is consumed in getting up to normal and it the dictation is commenced v i normal speed is reached, the record ivi be Weak or undiscernihle.

fhat i claim, is:-

l. in a telegraphone or similar machine, the combination ot a record medium support, a recording or reproducing device, feeding mechanism lor the latter, a motor driving means operated therebyv to drive the record medium support and iteeding mechanism, and a clutch tor connecting and disconnecting the feeding mechanism to and trom the motor vvithout ali'ecting the driving means tor the. record medium support.

2. ln a telegraphone or similar machine, the combination ot' a record medium, a recording or reproducing device in engagement with the suit'ace thereof, a carriage in which said device .is mounted, a teerA1 mechanism tor said carriage and means tor connecting and disconnecting the carriage to and trom the i'ced mechanism Without displacing the recording or reproducinfg` device.

il. lin a telegraphone or similar machine, the combination ol a rotary support lior sustaining a disk record, a carriage having a engagement with the feed screiv TT, and the A recording or reproducing device and movable. transversely with respect to the disk, and a scale carried by said carriage in such posh tion that the greater portion thereot regis ters vvith the disk during a part ot the travel ot the farriage.

l. ln a telegraphone or similar machine, the combination ot a recording medium in the form of a disk, means tor rotating said disk and means tor automatically stopping the disk when its surface has been entirely traversed b v the recording or re noducing device, said stopping means being reset by the return ot said recording or reproducing device.

o. ln a telegraphone or similar machine, the combination ot a record medium, a recording or reproducing device adapted to act thereon, a sere tor feeding said device across the record niediiun and means .tor stopping and starting the 'feeding screw Without ati'ecting the rotation otA the disk.

l. in a te1x graphono, a screiv shat't adapted to tecd the magnet arross the t; :e ot tho record medium, a motor adapted to drive said shaft, a clutch tor connecting and disconnecting the shatt ivith the motor. an electric sivitch controlling the circuit ot the magnet, and means tor simultaneously operating the clutch and throwing said switch, substantially as described.

T. ln a talking machine, the combination ot a rotating record medium. a recording and reproducing device cooperating therewith, means r lfeedii j the latter across the eurace ot the torn r. and means tor stopixiing and starting the feeding means independent of the record medium, and without removing the recording or reproducing device from operative position with respect to the record medium.

8. ln a talking machine, the combination of a record medium in the form of a disk, a recording or reproducing magnet arranged to cooperate with one surface of the disk and a similar maO'net arranged to cooperate with the other surface of the disk at a point not directly opposite the first magnet, a single carriage in which both magnets are mounted, and means for feeding said carriage so as to cause the magnets to move at equal speed across the respective surfaces of the disk.

9. In a talking' machine, the combination of a recording medium in the form of a disk, a carriage having' one portion extending along one face of the disk and another portion extending along the opposite face of the disk, a recording or reproducing device cr `ried by each portion of the carriage and not in line with each other in a direction perpendicular to the disk, and means for feeding the carriage, substantially as described.

lO. ln a talking' machine, the combination of a recording medium in the form of a disk, a recording or reproducing device located upon one face of the disk near its outer edge, a second recording or reproducing device located upon the opposite face of the disk near but on the opposite side of its center, a single carriage for supporting both recording or reproducing devices and means for feeding said carriage.

l1. In a talking machine, a record medium in the form of a disk, a traveling' carriage and a recording or reproducing device located upon each face of the disk and carried by said carriage in such positions that only one of the same is movable out of range of the disk to permit the removal of the latter from its supporting spindle.

l2. In a talking nnichine,` the combination of a record medium in the form of a disk, a carriage carrying a recording' or reproducing device, means for normally forcing said device toward the surface of the disk, and a support for the recording or reproducing device when in proper position for the removal of the disk.

1?). In a telegraphone, a recording magnet having a removable core and pole piece, a frame in which said magnet is mounted, and means for reversing the normal position of the magnet to facilitate the removal and replacing of the core and pole piece.

le. In a telegraphone, the combination of a` record medium in the form of a disk, two electromagnets cooperating with said disk, a frame in which said magnets are mounted in a line with each other substantially coincident with the direction of rotation of the disk, and means whereby the direct-ion of the essere line connecting the pole pieces of the magnets can be shifted, substantially as described.

l. In a telegraphone, the combination of a record medium in the form of a disk, a pair of magnets mounted in a single frame and adaptel to cooperate with said disk, a carriage in which the magnet frame is supported, and means for adjusting the magnetJ frame and carriage so to change the position of the magnets with respect to the disk in two directions.

16. In a telegraphone, a recording or reproducing magnet having a removable core in combination with a removable plate normally resting against the rear end of the core to prevent its removal.

17. En a telegraphone, a pair of magnets mounted in a single frame, each magnet having a removable core, and a spring plate pivoted at the rear of said magnets and normally preventing the removal of the cores, as described.

18. In a telegraphone, a frame, two electromagnets lmounted therein, and a plate to which said frame is attached and on which it. is supported, means for adjusting said frame in a` rotary direction upon said plate, and a carriage in which said plate is mounted.

19. In a talkingmachine, a carriage for the recording or reproducing device, a bed plate along which said carriage moves in parallel bearings, said bearings each comprising a hallway or groove, one bearing containing a single ball and the other' two balls and one of the. grooves being adjustable in width for the purpose set forth.

20. In a telegraphone, the combination of a bed plate or base, a carriage movable thereon, telegraphone magnets carried by said carriage, and electrical conductors eX- tendingl from said magnets through hollow portions of the carriage and thence through an opening in the base or bed plate in which the conductors have free movement during the traverse of the carriage.

21. In a talking` machine, the combination of a record medium in the vform of a disk, a rotating spindle upon which the same is carried, a motor for driving said spindle, a'

clutch for connecting the motor to the spindle, a brake for the rotating spindle, and means for automatically opening the clutch and applying the brake when the recording or reproducing devices have finished their traverse in one direction. v

In a talking` machine, the combination of a record medium in the form of a disk, a carriage carrying recording or reproducing devices adapted to cooperate with said disk, a rotating spindle carrying said disk, a driving motor, a clutch, a brake, a spring, means whereby the final movement of the carriage will store power in said spring and llO then release the same, and means whereby the spring will successively actuate the clutch and brake.

23. ln a talking machine, the combination of a record support, and means :tor retaining a record disk upon said support comprising a knob over which the opening' at the center ot the disk can be passed, a plurality ot arms adapted to be housed within the diameter of the knob, and means Jor extending said arms to overlie the disk.

24. In a talking machine, the coi/nbination of a record medium in the form of a disk, a spindle on which the same is carried, and means for retaining' the disk upon the spindle comprising a knob over which the opening` at the center of the disk can be passed, a plurality ot' spring arms adapted to be housed within the diameter ot the knob, and means for extending said arms to overlie the disk.

25. ln a talking machine, the combination ot a record medium in the torni oit a disk having an opening' at its center, a spindle on which said disk is carried, and means tor holding` the disk on the spindle comprising aknob adapted to pass through said opening, a plurality ot arms pivoted within the diameter of the knob, and means whereby the rotation ot' the knob will cause said arms to be thrown outward to overreach the disk or withdrawn to clear the opening in the disk.

ln a talking,` machine, the combination of a record medium in the form of a disk, and provided with a central opening, a spindle upon which said disk is mounted, and means for holding` the disk upon the spindle comprising' a knob adapted to pass through the opening,y in the disk, a gear wheel mounted to turn with the knob and a plurality ot pivoted arms each having' gear segments in mesh with said gear wheel and adapted to be thrown outward and inward with respect to the axis ot' the disk by the rotation of the knob.

Q7. In a talking, machine, the combination of a record medium, a carriage carrying a spring` pressed frame, a recording or reproducing device carried by said frame, and a foot or support adapted to rest upon the' surface of the record medium.

2S. 1n a talking` machine, the combination of a record medium, a spring' pressed frame, a record or reproducing device, and a toot or support whose bearing surface is a -iewel adapted to rest upon the surface of the record medium.

29. In a telegraphone, the combination with a telegraphone magnet having an iron core adapted to bear upon the record me` dium, said core being` itted with a jewel or other wear resisting material in the torni of a collar, a cavity being formed between the extremity of the core and the adjacent portion of the refractive collar.

30. In a talking machine, a traveling,` carriage comprising a body in the form of a trame-adapted to inclose the spindle of the record support, and an inwardly extending arm adapted to carry the reproduccr or recorder at or near its extremity.

31. ln a telegraphone, a magnet supporting' block 3Q having longitudinal grooves 156 for receiving' the flexible supply wires ot the magnets, said block being carried by a horizontal pivot transverse to said grooves.

ln a telegraphone, a traveling' carriage having a spring pressed rock shat't 116 journaled therein, and a handle 11T and "feed nut rigid with said rock shaft.

83. ln ay telegraplionc, the combination of traveling carriage, a spring pressed trame carried thereby, and a magnet pivoted to said trame, said magnet being angel-arly adjustable about to an axis perpendicular to its pivotal axis.

3l. ln a telegraphone, the combination ot a body and the -vertically adjustable rod 172: adapted to receive and sustain the recorder or reproducer in one oi' the extreme positions of the traveling' carriage.

ln a telegraphone, a traveling car` riage in the form of a rectangular frame, one of the sides ot' said frame being provided with a groove 205 i'or receiving' the magnet supply wires.

3G. ln a talking machine, the combination ct' a record support and means tor retaining a record disk upon said support comprising a handle over which the center openingl of the disk can be passed, and one or more arms movable by said handle from a position bounded by said opening' into a position overlying the disk.

37. In a. talking machine, the combination of a record support and means tor retaining a record disk having' a central opening` upon said support comprising; one or more arms movable from a position bounded by said opening into a. position overlying the disk.

38. ln a talking machine, thc combination of a record medium, a carriage carrying a spring' pressed frame, a recording or reproducing device carried by said trame, and a toot or support and pad adapted to resi upon the surface of the record medium.

In witness whereof, l subscribe my signature, in the presence ot two witnesses.

FREDERIC SCHEFER.

Witnesses:

WVM. D. Cocina, HARvE R. STUART.

horizontal.