Jan. 14, 1947. ' c. w. DANN m; ' 2,414,140 PHONOGRAPH ARRANGEMENT Charles M Dam: Richard M?omers _ _ I > attorney; Jan. 14, 1947.v ' c. w. DANN- ETAL PHONOGRAPH ARRANGEMENT Filed Nov. 8, 1943 ‘ k-m 2,414,140 ‘ ‘ 2 Sheets—Sheet 2 ' N Izar-Zes W. .Da'rzrz Rz'chardM.Smzer.s Otfqrneg Patented Jan. 14, 1947 2,414,140 UNITED STATES PATENT OFFICE'_ 2,414,140 PHGNOGRAPH ARRANGEMENT Charles W. Darin, Orange, and Richard M. Scmers, West Orange, N. 1., assignors to Thomas A. Edison, Incorporated, West Orange, N. 3., a corporation of New Jersey Application November 8, 1943, Serial No. 509,518 13 Claims. Our invention relates to phonograph arrange ments wherein two or more phonographs arerin tercoupled for sequential operation, and relates particularly to a unitary system for intercoupling a pair of separate phonographs of the dictating machine type, which system is adapted so that it may be readily attached to the machines and be readily detached when the separate dictating (Cl. 274-18) 2 then enclosed by a. small closely-?tting cabinet. Our invention is particularly applicable to this type of phonograph such as is now manufactured and sold, for it may comprise a, pair of intercon nected control or ‘coupling units that may be mounted on the machines in the‘ place of the speaking tubes, which coupling system" may be adapted to interconnect the control systems of the machines are to be used singly. two phonographs so that, on completion of a trav; Many establishments have as part of their 10 ersal of vthe sound-translating device across the‘ O?lCe equipment two or more‘dictating machines which are normally used singly during odd hours of the day for dictating reports, letters, memo randa, etc. At these same establishments there record of one machine, the other machine will be ~ automatically started, and vice versa, whereby to provide a continuous phonograph operation. As an additional feature of this particular applica may be occasional need for a machine for 15 tion of our invention, there may be provided an recording and reproducing matters of a con; electro-acoustical transducer in each coupling" ' tinuous character such as conference proceed unit for conditioning the acoustical machine forv ings, telephone conversations, etc.; but it may recording electrical sound-representing signals. not appear economically justi?able to purchase a This conversion of the machines for recording and special dual machine just for this purpose. By 20 reproducing electrical signals is highly important our invention, however, two such single machines because sequential phonograph arrangements are on hand may be readily interconnected for re used commonly for recording conference proceed~ cording and reproducing relatively continuous lugs and the like, wherein a large ampli?cation of ' matters. This is accomplished by providing a cou the voice energy is needed to obtain a satisfactory pling apparatus of relatively small cost which can 25 level of recordation on therecord. be readily attached to two separate dictating ma~ Our invention contemplates that the coupling‘ chines to interconnect them for sequential‘ opera units be interconnected by a ?exible means, and tion and be also readily detached so that the that this means may be either of a mechanical or . separate machines may be used singly as needed. electrical type. ,We preferably employ, however, . It is accordingly a general object of our inven 30 a ?exible mechanical connection—-suitably, for tion to enable normally singly-used dictating ma example, a Bowden wire-for we ?nd this type of chines to be interconnected for sequential opera connection permits a great simpli?cation in the tion by the mere attachment of a simple unitary structure of the coupling system, provides a wide coupling system thereto. latitude in control of the phonographic machines Our invention has been adapted to acoustical 0: Ca and assures a dependable operation. tF/pe phonographs such as are disclosed in Langley It is an object of our invention to provide im" Patent No. 2,150,554, and we do herein illustrate proved means for intercoupling phonographs for and describe our invention in connection with this sequential operation. type of phonograph. It will however be under It is another object to provide phonographs with stood that we intend no unnecessary limitation 40 a unitary intercoupling system therefor which of our invention to this type of phonograph for may be readily attached to interconnect a plu l e broader aspects of our invention have applica rality of the phonographs for sequential opera tion to phonographs generally. tion, and may be detached to permit the separate Acoustical-type phonographs, or dictating ma phonographs to be used singly, as desired. chines, are provided with speaking tubes and on It is another object to provide a unitary cou these speaking tubes there are provided manually operable controls for putting the machines into and out of operation. accordance with the abovementicned Langley patent, the speaking tube and a?ixed controls each have a separable connection with the phcnographic machine by which they may be readily detached as a unit, this facility for detachment having been provided pling system which is adaptedfor attachment to phonographs as now constructed for interconnect- . ing pairs of phonographs for. such sequential op eration, and which may be readily detached to ‘ permit the separate phono-graphs to be used singly, as desired. . . ~ It is another object to provide a unitary sys tem for intercoupling phonographs for sequential so that the speaking tube may be removed when. operation which permits the ‘separate phono—. thehmachine‘ is not in use and the machine be .55 graphs- to be used singly, as desired. 2,414,140 3 4 and a feed nut 56 which is pivoted to the carriage l for movement into and out of engagement with the feed screw. This abovedescribed mechanism for producing a relative progressive movement between the translating device 2 and record 5 It is another object to provide a unitary system for interco-upling phonogra-phs for sequential op eration which permits the phonographs so inter coupled to be differently positioned relative to one another as may be convenient. _ that is, a rotation of the record and concomitant It is another object to provide a unitary at tachable systems for“ interconnecting a pair of" traveling movement between the‘transla-ting de~ vice and the record?weiherein‘ reierto as the phonographs‘ for sequential operation and for operating or drive mechanism of the machine. concomitantly converting the audio systems of In the usual acoustical-type phonograph the such phonographs for recordation and reproduc 10 tion of electrical sound-representing. signals. power referredsupply to as circuit it in Figure for the 19, motor seriaily iii, which includes It is a further object to provide improvedv means for intercoupling phonographsifor, sequene a so-called hook. switch l8. This hook switch comprises a pivoted arm 49 which projects for~ tial operation, which is simple in constructiom flexible in control and dependable in operation. These and other objects of our invention‘will i more fully appear from the following. description and the appended claims. In the description of our invention reference is had to the accompanying drawings, of which: Figure: 1.- is a. partial elevational view of an acousticaL type phonograph to which" the dis~ closed: illustrative embodiment of our invention is adapted. to i be: applied; FigurerZ is a: top plan view of the sound-trans lating device; of‘ such phonograph as seen with the; speaking tube detached; FigureyB is a vertical sectional view or such acoustical-type phonograph, taken» on the line 3-3 of Figure 9‘but with parts broken away, and showing one. of the coupling; units of ourinven 1 wardly from the frame I and serves as a sup port, during non-use'of the machine; for a speak ing tube 20, this tube being provided for con~ ducting sound to and from the translating de vice 2 as is shown in Figure 1. The weight of the tube on the arm 49 serves to hold the switch I8 open and keep thev motor [El idle‘during non use of the machine, but when the tube is re moved the arm 19 is moved upwardly under the influence‘of a spring (not shown) to close the circuit ll and start the motor‘ running. The clutch i3 is controlled by an electromag» netic clutch device 25 mounted underneath the frame 1. This device is coupled to the clutch by way of a link 22 and a lever ‘23 which is shown 30 in Figures 3 and 9. The clutch device is prefer ably constructed according to U. S. Langley Pat~ ent No. 1,380,486, to which reference may be had Figure‘ 4. is a’ partial bottom‘ view‘ of one such for details of its construction.. For the present coupling; unit‘ with a' cover' part removed to show purpose, the clutch device is su?iciently described 35.7 by the statements that it comprises a pair of the. interior" construction.- thereof; Figure? is a partial sectional view of one such start and stop electromagnets 24 and 25 (see Fig coupling 'unit- taken on the lined-4'» of Figure 4; ure 10), a pivoted armature 26 which is con Figure: 6" is a" top plan View, with the cover nected to the aforementioned link ‘22 and at removed-,1 of; one: such coupling unit; tractable alternately by the electromagnets upon Figure 7.. is a‘ detailed sectional view taken on their respective energizations, and circuit means the line: 'I.—-'li of Figure 6; for automatically opening the circuit 01‘ the elec Figure:8:is: a- detailed view taken on the line tromagnet last energized upon attraction of the 8-8 1 of Figure 6; armature thereto and for concomitantly prepar Figureig-is a partial-front View of two phono . ing the circuit of the other. electromagnet for I graphic machines as. intercoupled'by our inven ' next energization. This circuit means may com tion;;. prise'a single~pole double~throw switch having Figure: 1.0.is adiagrammatic'view of thecircuits a pole member 2? connected to one side of the and mechanism of a-Jdual phonograph arrange power supply line i? and operated directly by ment according- to. ourinvention; and the armature 2%,. and cooperating switch con Figure 11 is‘ a» perspective view’ of the rotary 50 tacts 28 and connected serially to the respec switch structure of. one" of the coupling units. tive electromagnets and so positioned that the tion applied thereto; In; the: drawings there is. shown a common. variety of acoustical-type vdicta-ting machine. Asw contact connected to'one electromagnet is en‘ which is. mounted" slidablyi'on a pair of cross rods 3 and 3a fortravelingmovement- along a record support 4. The record support is" typically of a and vice versa. support or mandrel has a. central shaft 8 jour nalled: at‘ one end. to an: intermediate standard 9 of theiram'e:v ‘i. Rotation" of the mandrel is connected to one side of the power line I‘! which theitrans'latingdevice along-the record. 5.. This supplied momentarily to thesstal‘t‘ electromagnet gaged by the pole member 2.? when the armature appears in’ Figures l, 3 and 9 this machine has.» ' a carriage l for a sound-translating device 2,. . has been attracted to the other electromagnet, For controlling the clutch device 2|, there is provided a. manual single-pole double-throw switch 31) which is typically placed on the outer mandrel‘ type adapted for supporting a cylindri cal'record 5. The crossrods are carried-byup 60 portion of the speaking tube 20 as is shown in Figure'l. This switch has its pole member. 3| right‘ side standardsti ofiaframe liandathe record - is opposite to that to which the pole member 21 is connected and has itsswitch contact members produced by. a motor i0; (only-diagrammatically 65 32 and 33 connected. respectively to the start and stop electromagnets, 24 and,25. The, pole mem show-nv in. Figure 10). which: transmits? its; power ber of this manual switch is biased to stop posiby‘ way; of‘ a.be1t‘ H; to. a: drive. pulley-‘l2: This tior_—that is, a position wherein it is closedwith: , pulleyisijournalled tothe leftzstandard. 6 of. the the-contact memberconnected. to thestop coil. frame and"; 183001113186. by way: of: a clutch is. to. the. mandrel shaft; The. motor. It alsohasa 70 Ondepressing the pole member 3! to make con-1 tact with. the. other contact member, current is drive connection to the carriage. !. for: feeding.v drive connection is completed. by way or a. feed. ‘screw? l4. that is: journalled to the standards; 5. and coupled by gearing; I15: tothe. mandrel shaft; and the. armature is actuated to engage the clutch; vice.versa,. on releasingthe pole. member‘ 3! current. is supplied momentarily'to; the». stop; 2,414,140 5 electromagnet andthe armature is attracted to disengage the clutch. The sound-translating device 2, which may telescope on the tubular neck 34 exteriorly there of. The details of construction of this tube 54 have any suitable construction, is herein illus trated as being of the type described in Dunning et al. Patent No. 2,279,227 to which reference may be had for details of its construction. For the present purpose the device is suf?ciently described as havingr a tubular neck 34 for conducting sound to and from the device, recording and reproduc ing styli 35 and 36 for cooperation with the record 5, and a pair of lifting ?ngers 31 for selectively raising and lowering the styli into and out of engagement with the record. These lifting ?n gers are pivoted to the carriage l and controlled 15 same as of the corresponding part of our inven by a cam member 38 that is splined at 39 to the cross rod 3 (see Figure 3). To control these ?ngers, there is a hand lever 39 which is pivoted are not shown in the drawings since they are the tion hereinafter described. For the present, it may be noted that this tube 54 is typically made of an insulating material such as of Bakelite, that it has four equidistantly spaced arcuate ter minals set into the exterior surface thereof and connected to the manual switch} 30 and signal lamp 50 in the manner aforementioned. and that When the cap 54 is in mounted position these terminals contact the buttons 52 to complete the connections from the manual switch 39 and signal lamp 50 to the power supply circuit i5 and clutch device 28. Additionally, it may be noted that for releasably retaining the cap 53 swivelingly to the translating device, the tube 54 is provided with at 40 to the carriage and coupled by a link 4! an exterior annular groove which the contact to the cam member, the rod 3 being journalled 20 buttons 52 engage under their spring pressure, in the standards 6 to permit the cam member and that for limiting the range of swiveling move to be rocked back and forth by the hand lever. ment of the speaking tube the cap thereof is pro The control action of the hand lever is typically vided vn'th a front ?n 53a which engages a wide such that when the lever is in the raised posi notch 4122 provided in the ?ange 41 of the trans- ‘ tion it occupies in Figure 1, the reproducing . lating device. stylus is in engagement with the record; that It will be understood that the apparatus here-y when the hand lever is in a lowered position inabove described is common to dictating ma indicated by dash-dot lines in Figure 1, the re chines such as have been heretofore manufac cording stylus is in engagement with the record; tured and sold, and that this apparatus forms a and that when the lever is at a mid or neutral position both styli are held raised from the record. The hand lever 39 is also adapted to disengage the feed nut Hi from the feed screw l4 when the lever is in the neutral position abovementioned. In order that the feed nut may be so controlled, it is mounted on a lever 42 which is pivoted at 43 to the carriage I as shown in Figure 3. ,A spring 44 acts on the lever 42 and urges the feed nut into engagement with the feed screw. When the hand lever 39 is in recording and reproduc ing positions, the lever 42 is under the sole in ?uence of the spring 44 and the feed nut is then engaged. However, when the hand lever is moved to neutral position, a pin 45 on the cam member 38 ‘engages a forwardly-extending arm 42a of the lever 42 and cams this lever against the re straining force of the spring 44 to disengage the feed nut. - ‘ ‘ ‘ part of our invention only by way of its combi nation with the apparatus hereinafter described. In accordance with our invention, we provide a unitary coupling system for phonographs which comprises two identical control or coupling units 55 having a ?exible interconnection 56 as shown in Figure 9. These coupling units are adapted to be attached to the respective phonographs. In the present illustrative embodiment of our invention, these units are attached to the phono graphs in the place of the detachable speaking tubes 24, and by that attachment the two dictat ing machines are intercoupled for automatic se - quential operation and are adapted for recording and reproducing electrical sound-representing signals, as aforementioned. Each coupling unit 55 has a frame 51 made suitably of stamped ?at metal parts and a cover 550. On the bottom of this frame there is secured a hollow cylindrical Bakelite housing '58 from which projects a central tube 59 adapted to tele Surrounding the tubular neck 34 of the sound translating device 2 is a cylindrical housing 46 (see Figure 3) made of an insulating material scope over the tubular neck 34 of the sound such as of Bakelite. This housing ?ts into the translating device, this being the tube corre lower part of a circular upstanding ?ange 41 spondlng to the tube 54 of the speaking tube. provided on the frame of the translating device This tube 59 has four equidistantly-spaced arcu 2} It is held in place .by pins or screws 4511 as 55 ate terminals 55 embedded in the exterior surface shown in Figure 2. This housing has four equi thereof and has an annular exterior groove 6| distantly spaced spring terminals 48. Three of as shown in Figure 3. When the coupling unit these terminals are connected to the clutch device is in mounted position, the contact buttons 52 2| by the leads 49, these being the leads which engage the groove Bl under their spring pressure connect the manual switch 30 to the clutch device to make contact with the respective terminals 60 as aforementioned; a fourth lead 49 shown in and to detent the coupling unit to the sound Figure 2 serves with the lead to the pole of switch translating device. The terminals 50 extend up 38 to supply power to a signal lamp 55 typically into the housing 58 and are therein provided with provided on the speaking tube 20 as shown in Wings 52 which are bent over and anchored by Figure 1. From the housing 48 these leads ex pins 53 to the upper part of the housing as shown. tend through an apertured boss 41a of the ?ange in Figure Zl. Across the bottom of the housing 58 41 and then through a cable 5| along the side is an annular closure plate '54 (see Figure 5) of‘ the carriage l to below the frame ‘I. The which is held in place by screws 65. spring terminals 48 respectively carry contact buttons 52 which extend radially inwardly through the housing 46. On the inner part of the speaking tube 25 there is a circular cap 53 which is adapted to ?t swivelingly onto the ?ange 47. Extending down from the central portion of this cap is a short tube 54 which is adapted to Mounted directly above the bottom plate of the frame 51' is an electroacoustical transducer 65 shown in Figure 5. This transducer may typi cally comprise a headphone of the piezo-electric or magnetic type, the former being however pre ferred as it is typically" very thin. This trans- ' ducer has a tubular sound outlet 51, preferably 2,414,140 7. 3 arms ‘i2 is connected to the stop: electromagnet 25. ' When theshaft TI is in a most counterclockwise position-—a position wherein the crank 11a ducer and translating device. The transducer is thereof is inclined downwardly and to the right secured to the frame ‘5’! by an overlying bracket as shown in Figure 9-the forward switch arm 68 which. engages an upturned apertured lug 61a of the frame at one end and is‘ held to the frame by a screw 59 at the other end. . start electromagnet 24, and therback one.v of th of a. conical-exterior shape, which is‘ adapted to ‘ ~ engage the" upper inner‘ edge, of‘ the tubular neck‘ 34, and extend into the neck to form a substan tially closed sound’ coupling between the trans- - ‘l2 engages the respective switch contact member 85. and a closed circuit is formed from the central Electrical con nection to the transduceris made by means of a 10 or pole arm '82 through the front arm 12 to the cable 19. start electromagnet, this being the start position ' for the switch ‘H. Provided of course the hand Mounted above the transducer 66- is a single lever 35 is in recording or reproducing position and the hook switch I8 is closed, which it nor This‘switch has three ?at spring'arms 12 mount ed insulatedly in‘ cantilever fashion on a ?at 15 mally will be, the left machine of the phonograph. arrangements shown in Figures 9 and 10 will now. plate 1-3 that is supported by a bracket ‘M of the be in operation and thetranslating device thereof frame 51. The‘ arms are spring-biased down will be advanced gradually across the rotating wardly against a pivoted switch structure "It record 5. When the translating device nears the shown in Figure ll. This switch structure in cludes a shaft ‘El jo-urnalled in a pair of aper 20 end of its rightward travel—which we herein term its terminal position—the crank ‘Ha is im tured lugs ‘E8 of the frame 51, which shaft has pinged against the right standard 6 and the shaft~ an extending end portion thereof offset to form pole. double-throw: switch ‘H of the rotary type. TI is turned gradually in a clockwise direction. On the (In order that the coupling unit 55 will be re shaft ‘ll between the lugs 18 there are secured front and back insulating plates 19 and 80 which 25 strained against being turned by the force ex erted by the standard 6 against the crank 11a, have sector shapes such as are indicated in Fig the coupling unit has a bracket 95) on its frontv ure- 7. These insulating plates are secured rigidly lower portion which engages the notch 41b of the. together but in spaced relation along the shaft ?ange M.) As the shaft '5'! is so turned thefront by means of two rivets 8! and pairs of inter vening spacers $2‘ on. the rivets. Each of the in 30 switch arm 72 ?rst breaks'connection with the respective switch contact member 85 and enters, sulating plates has. a peripheral surface at con onto the dwell 83 of the insulating plate 19, but it stant radius relative to the shaft ‘H, or dwell 83, a crank Tia. for the switch structure. will be understood ‘that this break in the circuit and a receding peripheral surface or recess 84. rfhe recess on the. front insulating plate 19 is at connection between the front and middle arms gular range between the recesses there is a sub ically as an incident of the engagement of the clutch. Both the front and back arms now. ride on the dwells 83 of the respective insulating plates 19 and 88, but in a further continued ad the clockwise end of the dwell 83 thereof while 35 '12 produces no direct control action because, as afore-explained, the circuit of the start electro the recess of the back plate 89 is at the counter magnet is already open, being opened automat-l clockwise end of the dwell thereof, and in the an. stantial overlap of the dwells of the respective insulating, plates. At. the recesses of the respec tive insulating plates. there are secured identi cally vshaped switch contact members 85. The contact surfaces. of these switch members extend vance of the carriage the shaft 11 is turned fur- ~ . ther clockwise to cause the back arm ‘#2 to ride onto the respective contact member 85. This closes the circuit between the central and back beyond the recesses and form an even arcuate ex tension of the dwells of the respective plates. These switch contact members are held to the in arms 72 and supplies current to the stop electro magnet to cause the clutch it to be disengaged. sulating. plates by the rivets 8! but, being identi caily shaped, they are pointed in. opposite direc The connection 58 between the coupling units is for intercoupling the rotary switches 11 so that tions. Between the spacers 82 on each rivet 8! there is clamped a third switch contact member 50 the operation of either of these switches willcause the other to be automatically operated. Prefer 8!}. having. a dwell along its full peripheral sur ably, the connection 56 is of Bowden-wire type face. The rivets SI. spacers 82 and switch con comprising a ?exible armored cable 9! which is tact members 85 and 86 are all made of a con-_ anchored at the ends into rigid tubular parts ductive material such as of brass, and are ac cordingly electrically connected together. It is 55 511) provided on the frames 5'5, and a. ?exible wire 92 which extends through this cable. The ends against the dwells of the insulating plates 19 and S8 andof the switch contact members 85 and 86 of this wire are connected to arms 93 secured to. the shaft W, and the length of the wire is so selected that, with the wire taut, the following, two conditions will be ful?lled: (1) the rotary switch ll of one coupling unit will be in stop position when that of the other unit is in start‘ position, and (2) the said one switch will enter startposition when the other has been moved that the arms 72 slidably bear. The. switch arms 72 are connected to three of the arcuate terminals 63 of the coupling unit by a three-wire cable 88; the fourth one of the terminals Eil-the one contacting the contact but-. tonv 52 that connects to the lamp 5!} when the speaking, tube 29 is attached—being not used. This. cable. 8!! may fold over the side of the cou 65 midway from start to stop position. - It will be‘ pling unit, and enter through a ferrule 89 into the cylindrical housing 58 wherein the. leads thereof are soldered to the. three respective ter minals just mentioned. These leads are so con nected tothe terminals 63 that when the cou pling unit is in mounted position the central one of the arms ‘i2--which is the pole member. of.‘ the, rotary switch lie-is connected.‘ directly to. one side offthe powersupplylin'e H. (‘see Figure 10.) ,> the. front) one . of‘ the. arms. .72 is. connected‘. to the. 75; understood that the start position of each switch begins when initial contact ismade between the: front switch arms 72 and respectiveswitchmem~ bore 85, and that to ful?ll condition ('2) without imposing strain on the interconnection 56, the. ' forward arm 12 of the rotary switch ‘H: of the. machine last. started is permittedto, move beyond startpositicn, with the arm riding across the. face of, the-respective. contact member85‘as ap pearsin. Figure I7,.while therotary switch ‘ll of. ‘ 9 the other machine is moved from mid to stop position. The sequential operation of the two phono taln an entirely dependable. and stable operation of the phonographs without ever encountering any instable or chattering, conditions of the clutch-operating mechanisms 2| such as will sometimes occur should they be electrically in terconnected. Also, the use ofa mechanical type of interconnection permits a wide ?exibility in control over the phonograph arrangement, such as is described in the two foregoing paragraphs, i0 by the addition of very simple means. graphs in the dual arrangement above described will be understood to be as follows: First, sup_ pose that the carriage of the idle machine is rest— ing in initial position and that the carriage of the operating machine is being driven across the rec ord, the operating machine being in this case the leftward one of the two machines shown in Fig ures 9 and 10. When the carriage of the operat ing machine nears terminal position to cause the switch ‘H thereof to be moved from start position to mid position, the switch ‘H of the other ma chine is moved from stop position into start posi tion and the idle machine is thereby started. Both machines will then be in operation while the switch 'H of the ?rst-operating machine is being It will be understood that the cables l0 to the ‘ transducers 66 constitute the signal input circuits for the phonographs when they are to be oper ated for recording and the signal output circuits when the phonographs are to be operated for re producing. Thus, when the phonographs are used to record from and to reproduce into elec moved onwardly from mid position to stop posi tion, whereupon the ?rst-operating machine is ~ automatically stopped. During the traversal of the carriage of the second machine across the record, the attendant. will shift the hand lever 39 of the ?rst machine to neutral position, manually trical sound systems involving electrical ampli?_ cation, the cables 10 will be connected to the out put of the ampli?er of such sound system during recording and to the input of the ampli?er dur ing reproducing, such ampli?er and circuit con trol connections as may be provided being not return the carriage to initial position, replace the ~ used record,'and then return the hand lever 39 back to operating (recording or reproducing) po sition. When the carriage of the second ma chine nears its terminal position, it will start the herein necessary to show. i We have herein particularly shown and de scribed an embodiment of our invention as ap plied to an existing type of dictating machine. This embodiment illustrates clearly the broader ?rst machine and thereafter stop itself. Since 30 aspects of our invention as well as speci?c details vided a continuous phonograph operation by the of one ‘preferred construction thereof, but no un necessary limitation of our invention to the de tails of this embodiment or tothe details of con struction of the dictating machine to which our combined machines. invention is herein applied is intended. It will, in this procedure there is an overlap of opera tion of both machines at the transition in oper ation from one machine to the other, there is pro- ‘ ‘ for example, be understood that our invention is In order that there may not be any heavy applicable to phonographs wherein the relative strain imposed on the Bowden wire 92, or carriage feed mechanisms of the machines, should the at progressive movement between the record and tendant let the carriage of one machine rest in translating device is produced by moving either its terminal position, with the feed mechanism 40 the record or the translating device with respect of that machine engaged, while the otherma to the other, that the drive or operating mecha chine is moved into its terminal position, there is provided a yieldable coupling between the units 55 which comprises a torsion spring 95 connected between the arm 93 and shaft 11 of each unit. The arm 99 may have a hub portion in the form of a bail (see Figure 6); and adjacent this hub portion there is an arm 96 which is rigidly se cured to the insulating plate '19 of the rotary switch structure ‘Iii by a stud 99a and provided , with a turned-over lug 91 that overhangs a short arm 98 of the bail. The spring 95 is hooked be tween this lug and the arm 93, and normally yieldably presses the short arm 99 against the lug 91. However, on moving both switches ‘H into stop position at the same time, this spring 95 yields so as not to impose any heavy strain on the intercoupling between the two units 55, In some instances it may be desired to have both switches ‘H placeable simultaneously into start position so that both machines may operate at the same time. In order that this may be done the Bowden wire is linked to the arm 93 through a one-way coupling 98 shown in Figure 3. For instance, the ends of the wire may con nect to rigid links 99 which pass slidably through apertured studs I00, that are pivoted to the arms 93, and then terminate in heads I01. In normal operation the studs bear against the heads to provide a tension coupling between the pivoted switch arms 93, but when both switches are shifted simultaneously to start position the studs I00 will slide downwardly along the links 99. By interconnecting the coupling units 55 with a mechanical means as above described We ob nism may be controlled by wholly electrical or mechanical means, and that the audio system for the machine may be wholly or the acoustical or electroacoustical type, for the adaptation of our invention to phonographs differing in these and other respects will be readily apparent to those skilled in the art from the foregoing dis closure. Also, it Will be understood that the em bodiment herein disclosed may be modi?ed in other ways without departing fro-m the scope of our invention, which we endeavor to express ac cording to the following claims. 55 We claim: 1. In a dual phonograph arrangement compris ing two separate phonographic machines respec tively including a rotatable record support, a phonographic translating device and an operat ing mechanism for rotating said support and con comitantly producing a relative progressive movement between said support and translating device: a detachable unitary system intercou pling said machines for sequential operation com prising two control units respectively detachably mounted on said machines and adapted for starting and stopping said. operating mecha nisms respectively; a coupling between said con trol units, including a ?exible operable portion permitting independent movement of said ma chines relative to one another, for causing either unit to be placed into start position upon the other being operated into stop position, and. vice versa; and means, coupled to each translating device and operated by the relative progressive movement between said record support and the o "2,414,140 11 ‘12 , including a rotatable record support, a movably mounted phonographic translating device and an anism into and out of operation, said'system com prising a pair of control units; separablemeans for detachably mounting said control units .onto said machines respectively and for concurrently effecting operative control connections of the units to said devices, each of said control units operating mechanism for rotating said support and concomitantly moving said translating device stop positions to control the respective one of said translating device for causing operation of the respective control unit. ' 2. A dual phonograph arrangement comprising , two separate phonographic machines respectively having a control member movable into start and devices; and a flexible Bowden wire coupling be from initial to terminal positions: a detachable tween the control members of said unit, permit unitary system intercoupling said machines for se ting independent movement of said machines quential operation comprising two control units re relative to one another, for causing either control spectively detachably mounted on said machines member to be moved into start position upon and adapted for starting and stopping said op the other control member being moved towards erating mechanisms respectively; means coupled to said units and operated by said respective 15 stop position. 8. ‘In an arrangement for intercoupling a pair translating devices in the movements thereof into of phonographic machines for sequential opera terminal positions for placing the respective units tion, said machines respectively including a rec into stop position; and-a coupling between said ord support, a phonographic translating device control units, including a flexible operable por tion permitting said machines to be moved 20 and an operating mechanism for producing a traveling movement of said device relative to said independently of one another for causing support: the combination of a control unit for either unit to be placed into start position upon each of said operating mechanisms; separable the other being operated into stop position. means for detachably securing saidvcontrol units 3. A detachable system for coupling for sequen tial operation two phonographic machine-s each 25 to said respective phonographic translating de vices and for concurrently eifecting operative having an operating mechanism and a device for control connections of said units with said oper putting the mechanism into and out of operation, ~ating mechanisms respectively; control members ,said system comprising a control unit for each 1 of said devices; separable means for detachably mounting said control units onto said machines respectively and for concurrently e?ecting opera tive control connections of the units to said de vices respectively; a control mechanism on each on said units movable into start and stop posi tions to put said operating mechanisms into and out of operation; ?exible means intercoupling said control units and permitting independent movement of said machines relative to one an" other for moving the control member of one unit of said units movable into start and stop positions to put the respective operating mechanism into 35 into start position upon the other control mem ber being moved to stop position; and members and out of operation, each of said units and re on said machines for abutting against said con spective devices being adapted to maintain the ' trol members and moving the same between start respective operating mechanism in operation and stop positions in response to the traveling during movement of the respective control mem ber from start to stop position and to maintain 40 movement of said respective translating devices. 9. In an arrangement for adapting a pair of the mechanism out of operation during move separate acoustical-type phonographic machines ment of the control member from stop to start for recording electrical sound-representing os position; and means intercoupling said control cillations and intercoupling said machines for se units, including a ?exible operable portion per quential operation, said phonographic machines mitting independent movement of said machines respectively comprising a record support, a sound relative .to one another, for causing either control translating device, an operating mechanism for member to be move-d into start position upon the producing a progressive relative movement be other control member being moved through a tween said support and translating device and a first portion of its travel from start to stop po control connection for said operating mechanism sition. terminating at said translating device: the come 4. The subject matter as set forth in claim 3 wherein said intercoupling means comprises a ?exible mechanical connection between said con trol members, and wherein each control member has a freedom of movement beyond start posi tion to permit either control member to be moved freely through the ?nal portion of its travel from bination of a pair of coupling devices each in cluding an electroacoustical transducer and a control unit, said coupling device-s being adapted for detachable mounting onto said respective sound-translating devices in position wherein each transducer feeds into the respective trans lating device; means for connecting said control start to stop position. units with said respective control connections 5. The subject matter as set forth in claim 4, upon mounting said coupling devices, said con wherein said intercoupling means comprises a trol units being operable into start and stop posi mechanical connection between said control mem tions for putting said respective mechanisms into bers and yieldable means in said connection for and out of operation; and a coupling between permitting either control member to be moved said control units, including a flexible operable onwardly into stop position while the other con 65 portion permitting independent movement of said trol member is retained in stop position. machines relative to one another, for moving 6. The subject matter as set forth in claim 3, either unit into start position upon the other wherein said intercoupling means comprises a being moved to stop position. ’ mechanical connection between said control 10. In an arrangement for adapting a pair of tion for permitting both control members to oc 70 separate acoustical-type phonographic machines for recording electrical sound-representing oscil cupy start positions at the same time. lations and intercoupling said machines for se 7. A unitary detachable system for coupling -members and a one-way coupling in said connec quential operation, said phonographic machines for sequential operation two separate phono respectively comprising a record support, a sound graphic machines each having an operating mechanism and a device for putting the mech 75 .translating devicei a sound-transmission tube 13 2,414,140 14 extending from said device, an operating mech means terminating at said device: a unitary de anism for producing a progressive relative move tachable apparatus intercoupling said machines ment between said support and translating. de- _ for sequential operation and adapting the ma chines for operation with electrical sound-repre senting audio systems, comprising a pair of cou pling units detachably connected to said trans-g lating devices, each of said coupling‘ units in cluding an electroacoustical transducer coupled spective sound tubes, an electrical switch and cir- V acoustically with the respective translating de cuit means for connecting said switch to the said 10 vice, and a control device having operable coupling respective circuit leads upon mounting the trans with said control connections when’ the unit is ducer, said switches being movable into start and so mounted, said control devices being operable stop positions to put said respective operating, into start and stop positions to put the respec mechanisms into and out of operation; a ?exible tive drive means into and out of operation; a cou operable connection between said switches, per pling between said units, including a ?exible op mitting independent movement of said machines erable portion permitting independent movement relative to one another for moving either switch of said machines relative to one another, for into start position upon the other being moved causing one control device to be moved into start to stop position; and means for causing said position as the other is moved into stop position, switches to be operated by a relative progressive 20 and vice versa; and means for causing said con movement of said respective translating devices. trol devices to be operated by relative traveling 11. An attachable system for coupling acous movement between said respective translating de vice and control circuit leads for said operating mechanism and terminating at said sound-trans lating device: the combination of a pair of cou pling devices each including an electro-acoustical transducer detachably mountable onto said re tical-type phonographs having movable sound translating devices, operating mechanisms for moving said translating devices from initial to vices and record supports. , l 13. In a dual phonograph arrangement com prising two separate 'phonogr-aphic machines re spectively including a phonographic translating terminal positions, and control circuits for said mechanisms terminating at said respective trans lating devices, said system comprising two elec troacoustical transducers adapted to be mounted device and an operating mechanism adapted for producing a traveling movement of said device between initial and terminal positions: a detach on said translating devices respectively; a pair ‘ able unitary system intercoupling said machines of switches carried with said transducers respec tively; circuit means for automatically electrical ly connecting said switches to said respective con trol circuits upon mounting said transducers; means interconnecting said switches for causing ; for sequential operation comprising two control units respectively detachably mounted on said machines and adapted for starting and stopping said operating mechanisms respectively; a ?ex ible coupling between said control units, permit~ ting independent movement o£~said machines relative to one another, for causing each unit to be operated by the other; and means, compris either to be operated by the other; and stationary means on the phonographs for cooperation with said switches respectively to operate the switches into stop positions in response to movement of said respective translating devices into terminal positions. 12. In a dual phonograph arrangement com prising two separate phonographic machines each including a rotatable record support, a rec ord cooperable translating device of the acoustical type, drive means for effecting a relative travel ing movement between said translating device and support, and control connections to said drive ing an element coupled to each translating device [ill and a respectively associated element mounted on the machine in the path of movement of said ?rst-mentioned element, for causing operation of the control unit of each machine in response to a traveling movement of the respective translat ing device. CHARLES W. DANN. ‘RICHARD M. SOMERS.