US2279227A - Phonograph - Google Patents

Description

April 7, 1942. o. M. DUNNING ETI'AL PHONOGRAP'H Filed Sept. 3, 1938 3 Sheets-Sheet Ap 1942- o. M. DUNNING ET AL 2,279,227

' PHONOGRAPH Fil ed Sept. 3, 1938 3 Sheets-Sheet 3 N E TORS- OMQZQ MJJunnmg L'ouzs Z. laFores'r TORNEY Patented Apr. 7, 1942 PHONOGRAPH Orville M. Dunning, Glen Ridge, and Louis Z. La Forest, Orange, N. J., assignors to Thomas A. Edison, Incorporated, West Orange, N. J., a corporation of New Jersey Application September 3, 1938, Serial No. 228,272

6 Claims.

This invention relates to phonographs, and more particularly to improved means for controlling the translating devices in phonographs of the type intended primarily for both the recordation and the reproduction of dictation.

A phonograph of the class mentioned comprises a record support, typically in the form of a mandrel, and a sound translating device mounted for movement along the record support and selectively adjustable into an inoperative condition and respective operative conditions for recording and reproducing. In a common form of sound translating device there are provided one or more elements movable into and out of record-engaging position as the device is adjusted into its operative and inoperative conditions. Such record engaging elements are of a delicate construction requiring careful handling in order to avoid damage being done thereto. In this and other similar arrangements wherein a record may be mounted on or removed from its support by a movement thereof relative to the translating device, serious damage may be done to the record and translating device if an attempt is made to mount the record on, or remove it from, its support whenever the sound translating device is adjusted into an operative condition.

It is an object of this invention to provide improved means in phonographs for avoiding such damage to the records and sound translating deuse.

Another object is to prevent damage to the record and to delicate parts of the machine by the provision of means automatically operated as an incident to an operation which the operator normally performs as he starts and stops dictation.

It is another object of this invention to provide, in phonographs, improved means for adjusting the sound translating device into operative and inoperative conditions as the phonograph driving means are rendered operative and inoperative.

It is another object of this invention to provide, in phonographs, a selector mechanism for the sound translating device and automatic means for adjusting the sound translating device in accordance with the setting of the selector mechanism.

It is a still further object to provide, in phonographs, power operated and manually controlled means for adjusting the sound translating device into its respective operative and inoperative conditions.

Other and allied objects will. 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 top plan View of a phonograph in which a preferred form of our invention is in-' corporated;

Fig. 2 is a vertical cross-sectional view taken along the line 2-2 of Fig. 1 showing electrical means for adjusting the sound translating device, the translating device and a control lever therefor being shown in their respective inoperative positions;

Fig. 3 is a vertical cross sectional view of the carriage showing the sound translating device and the adjusting mechanism provided therefor in side elevation, the control lever for the sound translatingdevice being in recording position;

Fig. 4 is a horizontal cross-sectional View of a portion of the mechanism of Fig. 3-taken substantially along the line 4 '4 of Fig. 3, but show ing the control lever and associated parts in inoperative position;

Fig. 5 is a diagrammatic view, partly in perspective, of mechanism and circuits in accordance with our invention.

Reference being had to Figs. 1 and 2, in particular, there will be seen a form of phonograph to which our invention is especially well adapted.

This phonograph comprises a base I having integrally formed therewith the left and right upright standards 2 and 3 and the intermediate standard 4. There is journalled in the standard 4 a shaft 5 bearing a record support or mandrel 6 which removably carries a cylindrical record 1. The mandrel 6 is preferably of a form comprising a tapered cylinder having a contractible and expansible chuck 8 at its open or rightward end which is adapted to be operated by imparting axial movement to a handpiece 8'; such a mandrel is disclosed in Gramann Patent No. 2,010,717, issued on August 6, 1935, and entitled Phonograph. The left and right standards 2 and 3 support forward and rearward longitudinal rods 9 and won which a carriage II is slidably mounted for movement along the record I. The carriage has a forwardly extending arm ll supporting a sound translating device [2 which, in its usual form, is selectively adjustable for sound recording and sound reproducing. For conducting the sound waves to and from the sound translating device I2 there is provided a flexible tube l3 carrying, at its far end, a handpiece [3 usable as a mouthpiece for recording, and as an earpiece for reproducing. On the handpiece l3 there front left-end section thereof, wherein there is provided an inclined raised portion l', carrying a pivot screw which the arm l extends. The arm l5 islresiliently maintained in an .upward position,.as

shown in Fig. 2, and is arranged to swingidownwardly when the handpiece .|3'- is placedthereon to operate a switch l6 serially connected in a power circuit I1, which circuit is connected to l5 about which the arm I5 is pivoted and having a suitable opening through of electromagnets "terminal positions in that mentioned type is shown diagrammatically in Fig. 1 and comprises two sets of electromagnets 38 and 38' operating the armatures 39 and 39', of which the armature 39' is coupled to the lever 33 by the link 33'. As appears in the mentioned Langley patent, when a circuit is established to cause current to flow through one set of electromagnets, both armatures are swung in the direction of that set to operate the clutch. When the armatures have substantially reached their movement, a suitable switch is operated to break the circuit of the set through which current has been passing and toprepare the circuit of. the

the phonograph with a suitablepower sourceby way of a plug H, as schematically shown in Fig. 5.

During operation of the machine, the carriage I is moved steadily along the record 1 longitudinallythereof by means of a feed screw l8 journalled in the left and right standards 2 and 3 and coupled to the shaft 5 by a train of gears I9. On the carriage N there is provided a feed nut which is arranged to couple the carriage to the feed screw l8. The feed nut 20 may be aptly located in the rearward hollow portion of the carriage and may be secured to a bracket 2| pivotally connected to the carriage by a pin or rod 22 supported by the side walls of the carriage. In order that the carriage may be readily disconnected from the feed screw l8 and be manually movable along the mandrel at will, there is provided'on the bracket 2| a forwardly extending arm 23 having a cam face 23' co'acting with a lateral pin 24 provided on the hub 25 of a control lever 26. The control-lever 26 is pivotally mounted'on a carriage sleeve 9 embracing the rod 9, the control lever extending upwardly through a slot 21 in the carriage. When the lever 26 is in its central or neutral position the bracket 2| is maintained in its most counterclockwise position by the coaction of the cam face 23' with the pin 24, the feed nut 20 then being free of the feed screw l8. Forward and rearward rocking movementsof the control lever 26 from" its neutral position, however, act to free the pin 24 of the cam face 23 so that the bracket 2| may turnin a clockwise direction, as by reason of a tension spring 28, tobring the feed nut 20 into engagement with the feed screw l8. The mandrel 6 is rotated by a motor M, shown schematically in Fig. 5, which may be coupled as bya belt to a pulley 29. This pulley is rotatably mounted on the inner side of the standard 2 and is axiallyinline with the shaft 5 to which it is adapted to be connected by a clutch. This clutch may comprise a toothed member 30 secured to the pulley'29, and another toothed member 3| splined to the shaft 5for movement into and out of engagement with the member 30. Such movement of themember 3| may be effected by imparting a rocking movement to a lever 33 pivotally mounted on a bracket. 34 secured to the standard 4 by the screws 35. The lever 33 carries a pin 36 engaging an annulargroove 32 provided in the clutch member 3|, and extends downwardly therefrom beneath the base plate I to make connection with suitable actuating means, this means being preferably of the form described in Langley Patent No. 1,380,486, issued June '7, 1921, andentitled Controllingdevice. -A clutch-actuating mechanism 31 of the aforeother set of electromagnets for operation. When the other set of electromagnets is energized, the reverse operation takes place, the clutch bein shifted to its other position, the circuit through the last mentioned set of electromagnets being broken, and the circuit of the first set of electromagnetsbeing again prepared for operation. In Fig; 5 there is shown the circuit diagram of the phonograph control circuits, including the electrical circuits incorp'orated in the herein disclosed embodimentof :our invention. From this diagram it. will be seen that the switch It controls the power supply to all of the power-operated' mechanisms of the phonograph, and that the operation of themotor M is fully controlled by this switch. When the handpiece I3 is resting onthe' arm. 15, the switch I6 is opened to disconnect the phonograph from its power source; but when the handpiece I3 is removed from the arm l5, as when the phonograph is to be put into' use, the switch I6 is closed to'put the motor M in operation and to render the other power-operated mechanisms operative. The pulleyn29, which is coupled to the motor M, thus moves continuously during the use of the phonograph. 1

The switch l4 on the handpiece I3 is arranged to control the clutch-actuating mechanism 31 shown diagrammatically in a simplified form in Fig. 5. The switch I4 is of the single-pole twoway type comprising a pole member 39 and the contact members 40 and 4|. The switch has a base portion integral with the handpiece l3, and a relatively movable portion or cover 42 secured to the handpiece by a pivot screw 43, as shown in Fig. 1. The cover 42 is preferably resiliently maintained in its upward position in any convenient manner, as by an upward bias of the pole member 39; in this position the pole member 39 makes electrical connection with the contact member 40. As the cover 42 is moved downwardly the pole member 39 breaks contact with the contact member 40 and thereafter makes contact with the contact member 4|.

The switch I4 is suitably connected to the actuating mechanism 31 by means of a, three-wire cable 44 extending along and within the flexible tube Hi to the sound translating device I2, at which point the cable is suitably extended onwardly within a flexible protective casing 45 to the actuating mechanism 31. The cable 44 is connected so that the contact members 40 and 4| are associated with the respective sets of electromagnets 38 and 38 of the mechanism 31. When the cover 42 of the switch I4 is resting in its outward position, with the pole member 39 making connection with the contact member 49, the clutch -is adapted to be in disengaged position, the circuit of the electromagnets 38' then being open so that no current will vpass through the mechanism 31. But as the switch 14 is operated to make connection between the pole member 39? and the contact member 44, current Will pass momentarily" through the electromagnets 38 sov as to operate the mechanism 31 to engage the clutch. When the switch is again operated to make connection between the pole member 39 and the contact member 40, current will pass momentarily through the el'ectromagnets 38 to operate the mechanism 3? to disengage the clutch. The rotation of the record and the movement of the translating device along the record for recording thereon or reproducing therefrom are thus readily controlled by the hand switch M.

The sound translating device i2, which is well known in the art, comprises an inverted cup member 46 (see Fig. 3) provided withan upwardlyextending neck 46 to which may be suitably connected the flexible speaking, tube l3. The:

' member 46 has also a downwardly extending lug 41 which carries a cross pin 48 having conical end portions forming pivots for a pair of angular spring arms 49 attached to a sound box 50 disposed substantially concentrically with, the cup member 46. The sound box 50 carries a stirrup bearing a recorder stylus 52. The sound chamber of the sound box 50 communicates with the neck 46' by means of a tube 53 which forms a universal joint with an apertured dome 50- of the sound box 50. By this arrangement any swinging movement of the sound box 50'is caused to be accompanied by a sliding movement of the tube 53 within the neck 46, the sound box, 55. being thus maintained in communication with the speaking tube l3 throughout such swinging movement.

The translating device I2 is also provided with a biasing weight 54 which is normally used-only during the operation of reproducing. This weight is disposed. between the sound box 50 and the record 1 and is pivotally secured to an arm 55 by means of a shoulder screw 56, the arm 55 being pivotally mounted on the cross pin 48. The weight 54 is thus free to Swing in a transverse direction about the screw 56 and. in a vertical direction about the pin 48. The weight 54 is suitably apertured to permit the stirrup 5| and the stylus 52 to extend freely therethrough during the recording operation. The weight 54 carries. a cross-pin 58 on which is pivoted an angular stylus lever 51, shown in Fig. 3. The outer or lower end 57 carries a reproducing. stylus'59 and the inner end 51"' is positioned within the stirrup 5| at all times.

Inthe adjustment |2 for recording, both the sound box 50 and the weight 54 are permitted to move downwardly, the weight 54 moving to a position in which it may be suitably supported by the record 1, and in which it plays sound box 50 moving downwardly until the recorder stylus 52 engages the record l. As so adjusted, sound waves conducted into the chamber of the sound box 50, by way of' the. tube I3, will actuate the recorder stylus 52 to form on the record, as the record 1 is'rotatedand the carriage H is moved steadily'forwardly therealong, a continuous groove having modulations in accordance with the sound waves.

In the adjustment of the translating device |2 for reproducing, the sound box 50 is moved into an upward position wherein the recorder stylus 52 is free of the record I and the weight 54 is left in a free floating condition. The rearward end 51" of the stylus lever 51, which lies of the translating. device no'part in recording, and thespeaking within thestirrup, 5|, is thus also moved upward.- lywith the latter. The weight 54, being in a free floating condition, urges the reproducer stylus lever 51 downwardly so a to bias the reproducer stylus 59 against the record I. The weight 54 moreover provides suflicient inertia so that vibrations imparted to the reproducer stylus 59, as it tracks a modulated groove of a rotating record, are almost wholly transmitted to the sound box Sound waves will thu 'be created within the sound box 50, in accordance with the modulations of the groove being tracked, and these waves will be conducted outwardly by way of the tube t3.

In the adjustment of the translating device I2 to inoperative condition both the sound box 50 and biasing weight 54- aremoved upwardly to free the styli 52 and 51 of the record supported .by the mandrel 6, as shown in Fig. 2. It is only when the translating device I2 is so adjusted that a record may be safely mounted on, or removed from, the mandrel 6'. Heretofore it has been customary to adjust the translating device by means of the control lever 26, this adjustment being arranged so that recording and reproducing adjustments are effected when the control lever 25 is in its respective forward and rearward positions, and so that a neutral or inoperative adjustment is efiected when the lever is in its neutral or central position. In this known arrangement there was no protective means for preventing the operator from accidentally manipulating the record with respect to the mandrel 6 while the translating device was adjusted in an operative condition. The record and translating device were thus subjected to the hazard of being damaged. vAs a protective means against such hazard it has been customary to partially obstruct the free mountingofia record on the mandreL or its removal thereirom,'whenever the translating device is adjusted in' an operative condition. This operation has not been altogether satisfactory, since it does not guard the mandrel sufficiently to prevent the operation of its ejecting mechanism, the operator being thus permitted to at least partially remove a record from the mandrel while the translating device is adjusted in an operative condition.

In our invention we provide means for automatically adjusting a sound translating device into operative and inoperative conditions, as an incident of putting the phonograph into and out of operation. example, be responsive toi. e., called into play by the manipulation of-the means controlling the record rotation and/or the carriage movement, such means being in the present instance the switch 14. This adjusting means may be operated in various suitable Ways, such as by the power means of the phonograph or by a separate actuating mechanism. Whenever the sound translating device is of a combined form adapted for both recording and reproducing, we provide a manually or otherwise operable selector mechanism which is adapted to limit and control the function of the adjusting means. This selector mechanism is preferably provided with an inoperative or neutral position and an operative position for each function of the translating device. When the selector mechanism is in neutral position the translating device is rendered inoperative; however, when the selector mechanism is set in an operative position; the translating device is adjustable, as by the automatic adjusting means provided therefor, between i'n This adjusting means may, for- 4 operativezcondition and that operative condition'which'corresponds to the setting of the selector mechanism. I

In Figs. 1, 2, 3 and 4 there is shown an embodiment of our invention comprising a selector mechanism controlled .by the manually operable lever 26, and an actuating mechanism 66 for adjusting, .or shifting the adjustment of, the translating device in accordance with the setting of the selector mechanism. In this arrangement the translating device 12 is adjusted to its various positions by the suitable operation of a pair of angular liftingarms 61 and 62 fulcrumed on the rod 22 and arranged to engage with respective lifting tabs 50" and 54" on the sound box 50 and the biasing weight 54. The arm 6|,controlling the sound box 56, is extended upwardly from its pivoting axis and there connected .with a tension spring 63, the spring 63 making. connection at itsother end with a rod 63 on the carriage, so as to bias the ar 61 in an upward direction. The control lever 26 controls the movement of the arm 6| through a cam 64 on the arm 61 and the pin 24 on the hub of the control lever 26. This cam is arranged to maintain the arm 6| in its most downward position when the control lever 26 is in its forward or recording position. As the control lever 26 is returned to neutral or inoperative position, the arm 61 is moved in an upward direction, as by the force of the spring 63, to place the sound box 50 substantially in its most upward position when the control lever 26 reaches neutral position. As the controllever is moved into its most rearward or reproducing position, the pin 24 moves pasta detent 64 onthe arm 61, which serves to yieldably retain the control lever in its reproducing position; the arm 6| is,v however, retained by the spring 63 in an upward position wherein to effect an upward biasing of the sound box 50 against the frame 4601? the translating device.

The arm 62, controlling the biasing weight 54, is mechanically free of the control lever 26 and is operated by the actuating'mechanism 66 controlled by the hand switch 14, such control being, however, restricted by the control lever 26, as is hereinafter explained. The actuating mechanism 60 (seeFigs. 2 and 3) is in all respects similar to the actuating mechanism 31 and comprises two sets of electromagnets 65 and65' having the respective cores 66 and 66 and operating the pivoted armatures 61 and 61. The armatures 61 and 61- are respectively provided with coacting cam portions 61a and 61a resiliently maintained in engagement by a tension spring 68. In operation, the armatures are alternately actuated, the cam portions 61a and 61a; being adapted so that the unactuated armature remains locked in position until the actuated armature reaches the end portion of its travel. At this time the lock on the unactuated armature is removed and this armature then moves by the force of the spring 68 toward the other into a position for subsequent actuation. Such movement of the unactuated armature serves to lock the armature last actuated. When the electromagnets corresponding to the armature unactuated in the last operation, are now energized the reverse process takes place.

Interposed between the armatures 61 and 61 is an insulatedly and pivotally mounted arm 69 carrying a vibration and sound absorbing'pad 10, commonly made of felt. The arm 69 is connected with a switch arm 11 serving as a pole member for, alternately making connection with a pair of contact members 12 and 12. As the armatures are alternately actuated the switch arm 1| remains in position until the unactuated armature moves, the switch arm 11 then being rocked to its other position. When the mechanism 60 is in the position shown in Fig. 2, the armature 61 having been last actuated, the switch arm 11 makes connection with the contact member 12' which is connected with one side of the electromagnets the contact member 12 bein connected with the electromagnets 65, as shown in Fig. 5. If the electromagnets 65' are then energiz ed by way of a circuit including the contact member12' and the switch arm 11, the armature 61 will move to its rightward position (see Fig. 2) and then the armature 61 will move rightwardly and thereby break the circuit of the electromagnets 65'. If the electromagnets 65 are then energized by way of a circuit including the contact member 12 and switch arm 11, the reverse operation takes place, the armature 61 moving to its leftward position and the armature 61'then moving leftwardly to break the circuit of the electromagnets 65.

In order that the mechanism 60 may be properly controlled by the hand switch l4 the sets of electromagnets 65 and 65 are connected, on the sides opposite to those making connection with thecontact members 12 and 12, to the respective contact members 40 and 4| of the handswitch, and the switch arm 1| is connected to the power source on the side opposite to that making connection with the pole member 39 of the hand switch l4. By this arrangement the armatures 61 and 61' are caused to be in their respective leftward positions, as shown in Fig. 2, when; the switch 14 is in its normally outward position with the pole member 39 making con: nection with contact member40, and the armatures 61 and 61 are caused to be in their respective rightwardpositions when the switch 14 is thrown to its other position.

The armature 61 is connected to the lifting arm 62 by means of a link member 13. This member is suitably connected to the arm 62 by a stud 14 secured to the arm 62, extending rightwardly of the carriage through an opening 14' and pivotally connected to the member 13 by means of a shoulder screw 13. The link member is also pivotally connected to the armature 61 by a shoulder screw 15, and is of a length such that the lifting arm 62 will be in its upward position when the armature 61 is in its leftward position, as shown in Fig. 2. The biasing weight 54, controlled by the arm 62, is then maintained in its upward position, and consequently the sound box 56, disposed directly above the biasing weight, is then necessarily in its upward position. When the actuating mechanism 60 is operated so that the armature 61 is moved rightwardly, the lifting arm 62 moves downwardly to permit a free downward movement of the biasing weight 54 into a position wherein'it is supported by the' record. With this arrangement there may be desirably provided means for locking the control lever 26 against movement from one position to another while the translating device is in an operative condition. Such locking means may comprise an upward extension 62' on the arm 62, which engages with the teeth 62" on the hub 25 of the control lever 26 when the arm is in a downward position. The operation of the adusting mechanism of the translating devic I2 is thus as follows:

With'the control lever 26 in recording position.

as shown inFig. 3, the translating device may be adjusted between inoperative and recording conditions. The arm 6| is then in its downward position, permitting free downward movement of the sound box 55 until the recorder stylus 52 engages the record. With the hand switch I4 in normal inoperative'position, as shown in Fig. 1, the armature 61 is in its leftward position, the arm 62 being then in its upward position, and the biasing weight 54 and sound box 50 therefore being in an upward or inoperative position. When the switch I4 is operated downwardly to start rotation of the record and forward movement of the carriage, the mechanism 60 is operated to bring the arm 62 into a downward position. The weight '54 and sound box 59 may then move downwardly into suitable positions for recording. When the switch I4 is again operated to stop the movement of the carriage and the rotation of the record, the mechanism 60 is operated to move the weight 54 and sound box 53 into inoperative positions.

When the control lever 26 is in its rearward or reproducing position, the translating device may be adjusted between inoperative and reproducing conditions. The arm BI is then in its upward position for supporting the sound box 59 in the position in which it is adapted to be located for reproducing; whereas the arm 62 is again operated between upward and downward positions, as the switch M is operated to start and stop movements of the record and carriage, for respectively adjusting the translating device into its inoperative and reproducing conditions.

In order to insure that the translating device will be maintained in inoperative condition when the control lever 26 is in neutral position, the actuating mechanism 50 is rendered inoperative to move the lifting arm 62 downwardly while the control lever 25 is in such neutral position. This inoperation of the mechanism 60 is effected by means of a switch 16, shown in Fig. 1, which is serially connected in the circuit of the electromagnets 65, this switch being open when the control lever 28 is in neutral position. The

switch 76 comprises a pair of normally open contact arms 71 and 18 which are insulatedly supported preferably in a molded frame 79 resting on the carriage I l. Pivotally secured to the control lever 26, intermediately thereof, is a bar 80 having a longitudinal slot 8| through which passes a shoulder screw 82 threading into the frame 19. The bar is thus adapted to slide forwardly and rearwardly as the control lever 28 is moved into recording and reproducing positions. Insulatedly connected to the bar 88 is a pin 83 slidably contacting a cam portion 11' of the adjacent contact arm 11 for moving the arm rightwardly into contact with the arm 78, as the control lever 26 is operated from neutral position to either recording or reproducing position. The mechanism 50 is thus fully operable when the control lever 26 is in recording and reproducing positions but it is restricted so that it cannot shift the translating device from an inoperative condition to an operative condition when the control lever 26 is in neutral position, the mechanism 60 being, however, operative to shift the translating device from an operative condition to an inoperative condition when the control 26 is in such neutral position.

Although we have shown and described our invention in terms of a certain embodiment, it will be understood that many modifications and changes may be made therein without departing from the scope of our invention, which we undertake to express according to the following claims;

WelClaim:

1. 'In a phonograph having. record rotating means}: in combination, means for controlling said record-rotating means; a sound translating device adjustable from an inoperative condition into respective operative conditions for recording and reproducing; a manually controllable. selector. mechanism for said translatin device having at least recording and reproducing settings; means, responsive to the means controlling said record-rotating' means, for effecting adjustment of said translating device between inoperative condition and the operative conditioncorresponding to the setting of'said' selector mechanism; and means for locking said selector mechanism against movement from one setting to another while said record-rotating means is in operation.

2. In a phonograph: in combination, a sound translating device adjustable between an inoperative condition and respective operative conditions for recording and reproducing; selector means for said translating device, characterized by a neutral position and respective operative positions for recording and reproducing; means, operable when said selector means is in an operative position, for adjusting said translating device between inoperative condition and the operative condition corresponding to the setting of said selector means; and means, influencing said adjusting means while said selector means is in neutral position, for restricting the adjustmentof said translating device from operative to inoperative conditions only.

3. In a phonograph including record-support rotating means: the combination of control means controlling said record-support rotating means and operable either to render the latter operative or inoperative; a translating device and means associated therewith for adjusting it, in relation to a record on said support, either into inoperative condition or respective operative conditions for recording and reproducing; and an operative connection between said control means and said adjusting means and effective when the control means is in position to render the record-support rotating means operative, for rendering said adjusting means inoperative.

4. In a phonograph having means for rotating a record and means associated with the latter for controlling the same: the combination of a translating device and means cooperating therewith to adjust it in relation to the record into operative and inoperative conditions; means, connecting said record-controlling means with said adjusting means, for causing said translating device to be adjusted into operative and inoperative conditions upon the starting and stopping of record rotation; manually operable means selectively movable either to render said adjusting means eiiective or to maintain said translating device in inoperative condition; and means operatively connected with said adjusting means and rendered efiective in the actuation of the same to place said translating device into operative condition, for locking said manual means.

5. In a phonograph having record-support rotating means: the combination of control means associated with said record-support rotating means for rendering the latter operative and inoperative; a translating device adjustable in rotating means:

same to render it efiective to from operative to and controllable to restrict the' tive operative conditions for recording and reproducing, said adjusting mechanism including means to shift said device between operative and inoperative conditions and selector means movable from a neutral position into recording and reproducing positions to select the operative condition effected by said shifting means; means to lock said selector means while said shiftin means isin operative position; and means, rendered efiective by said selector means in the movement thereof into neutral position, for restricting actuation of said shifting means to movement from operative to inoperative positions only.

'ORVILLE M.*DUNNING.'

LOUIS Z. LA FOREST.

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