US2092917A - Phonographic apparatus - Google Patents

Description

Sept. 14, 1937. I c. HUENLI CiH ET AL 25092317 '2 1 PHONOGRAPHIC APPARATUS Filed Jan. 5, 1952 s Sheets-Sheeti- Fl 6. i

INVENTOR Charles Jfuerolr'ch, BY Heinrich, F Max Gramamo ATTOR N EY Sept. 14, 1937.

C. HUENLICH AL PHONOGRAPHIC APPARATUS Filed Jan. 5, 1952 :s Shets- Sheet 2 i NVENTOR Charles Huenl Leh- Heim-zch E Max Era/norm BY J ORNEY Sept. 14, 1937. c. HUENLICH ET AL PHONOGRAPHIC APPARATUS Filed Jan 5, 1952 3 Sheets-Sheet 5 INVENTOR Char/es Hue/witch. 514s inm'ch FMax Gramann.

A TORNEY Patented Sept. 14, 1937 PHONOGRAPHIC APPARATUS Charles Huenlich, Bloomfield, and Heinrich F. Max Gramann, Orange, N. 3., assignors to Thomas A. Edison, Incorporated, West Orange, N. 1., a corporation of New Jersey Application January 5, 1932, Serial No. 584,770

7 Claims.

This invention relates to phonographic apparatus and more particularly, to phonographic apparatus adapted for use as a dictating machine.

It is an object of this invention to provide ap- 5 paratus of the class described which is so constructed and arranged that the phonographic apparatus may be located at a distance from the dictators position, while under the dictators complete control. l l

10 o It is a further object of this invention to provide improved apparatus of the class described which may be easily and quickly shifted from recording to reproducing position and vice versa.

It is still a further object of this invention to 15 provide apparatus in which the shifting from recording to reproducing position may be carried out electrically and from a remote point if desired.

It is a further object of this invention to provide apparatus of the class described provided with back spacing or repeat mechanism which is so arranged as to be incapable of operation whenthe apparatus is in recording position.

It is a further object of thlsinvention to pro- 25 vide apparatus of the class described in which the back space mechanism may be operated electrically from a remote point if desired.

It is still a further object of this invention to provide apparatus of the class described in which 0 the back space mechanism is interlocked with the recording and reproducing mechanism in such manner that the back space mechanism cannot be operated when the apparatus is in recording position.

It is still a further object of this invention to provide apparatus of the class described which is so arranged that the feed screw mechanism cannot be disengaged when the apparatus is in either recording or reproducing position.

Still other objects and advantages of our invention will be apparent from the specification.

The features of novelty which we believe to be characteristic of our invention are set forth in the appended claims.

Our invention, itself, however, both as to its fundamental principles and as to its particular embodiments, may best be understood by reference to the specification and accompanying drawings, in which Fig. 1 is a circuit diagram of a system accord ing to our invention,

Fig. 2 is a diagrammatic view, partly in perspective, of mechanism and circuits in accordance with our invention,

Fig. 3 is a detailed elevational view showing one form of the apparatus in reproducing position,

Fig. 4 is a similar view showing the apparatus in neutral position in readiness for a change of records.

In accordance with our invention we utilize a 5 dictating machine which may be of any of the well-known forms.

For the purpose of simplicity in explaining our invention, much of the mechanism of the dictating machine is not shown or described for the reason that it forms per se no part of our invention, and is well known in the art. It will be understood that such a dictating machine as herein contemplated usually comprises a cylindrical record mounted upon a mandrel and arranged to be rotated at the desired speed by-any suitable source of power, such as an electric motor, although any type or driving motor may be employed for rotating the record.

The sound box and diaphragm construction herein shown is the usual form of sound box and diaphragm construction used on dictating machines of a certain make, and since this is well known in the art, it is not described in detail.

It will be understood, however, that other forms of sound box and diaphragm mechanism than that referred to may be employed if desired.

The usual form of dictating machine employs a feed screw mechanism which serves to carry the sound box and diaphragm mechanism along the record as the latter rotates, and since various forms of such feed screw mechanism are well known in the art, only so much of the feed screw mechanism has been illustrated as is necessary to show the application of our invention thereto.

Referring to the drawings, reference character i designates a record mounted for rotation upon shaft 2. The sound box and diaphragm construction is indicated generically as 3 ,(Fig. 2) and carries a reproducing stylus 4 and a recording stylus 5. For the purpose of simplicity, we have. shown the sound box 3 as being fed by an electric telephone 6 arranged to work into the sound box 3. The winding of the telephone 6 is supplied with current through a suitable 46 transformer I in series with a telephone receiver II, and a second transformer 8, the primary of which includes in its circuit a suitable microphone 9 and source of current ill. The exact circuit and mechanism employed for supplying 50 currents to the telephone 6 forms per se no part of this invention and therefore is not described in detail.

It will be understood, however, that microphone 9 may be of any suitable type, and if desired, an amplifier may be interposed between the microphone 9 and the telephone 6. For instance, the microphone 9 and receiver II may be of the so-called hand-set type and may be provided with a hook and switch contacts so that when the operator picks up the microphone 9 in preparation for dictation, the driving mechanism of the dictating machine is set into operation to cause rotation of the record. Such apparatus is described in the copending application of Louis A. de Berard and George T. Martin,

Serial No. 467,854, filed July 14, 1930) entitled- System of recording.

While we have shown the recording and reproducing mechanism as consisting of two separate and distinct parts, the telephone unit 6 of the sound box and diaphragm unit 3, it will be understood that any suitable mechanism may be employed for directly translating the electric currents in the telephone winding 6 into vibrations of a stylus, and conversely, in translating the stylus vibrations back into telephone currents. Such apparatus is shown, for example, in the Patent No. 1,762,175 to C. Huenlich, issued June 10, 1930, entitled Electrical sound recording and reproducing apparatus.

It will be understood that the apparatus shown and described in the said application and patent may be substituted for that herein shown without departing from the spirit and scope of our invention. 3 I

As already stated in the arrangement herein illustrated, the sound box 3 carries a diaphragm 4D, pivoted at point 4| and also carries a floating weight 42 likewise pivoted at point 4I. Mounted on the lower side of the diaphragm 4B is a stirrup or U-like member 45 at the lower point of which there is mounted the recording stylus 5. The reproducing stylus 4 is mounted on one end of a lever 43 pivoted at its intermediate point 44 on the floating weight 42, the

opposite end of said lever lying within the stirrup or U-like member 45; As already stated, this construction is well known in the art.

In Fig. 2 the apparatus is shown in recording position in which the floating weight 42 and the diaphragm 40 are both permitted to drop freely to their lower extremities of travel, the floating weight 42 resting upon the record and being supported by an advance ball, not shown, which is mounted on the floating weight and which contacts with the record. The recording stylus 5 makes contact with the record while the reproducing stylus 4 is out of contact therewith..

As the record rotates, itwil'. be understood that sounds supplied to the sound box vibrate the diaphragm 40 in the well known manner, and

thereby engrave the record through the medium of recording stylus 5. In order to reproduce, the diaphragm 40 is lifted up by appropriate mechanism until the recording stylus 5 no longer contacts with the record. As the diaphragm 40 is lifted the base of the stirrup 45 contacts with the free end of the lever 43 and lifts up the floating weight 42, and forces the reproducing stylus 4 into contact with the record. The vibrations of the reproducing stylus are then transmitted through the lever 43 to the stirrup 45 and thence to the diaphragm 40 producing sound waves in the sound box.

In the arrangement shown, ,in recording, the diaphragm of telephone 6 is caused to vibrate by currents produced by the speaker's voice, and the vibrations of such diaphragm produce waves which travel down into the sound box 3, impinging on the diaphragm 4D in the same manner as if the dictator had spoken directly into the sound box. Conversely, in reproducing, the sounds generated by vibration of the diaphragm 4O serve to set into vibration the diaphragm of the telephone 6 and the vibrations of the latter diaphragm cause a variation in the flux through the telephone windings and thereby cause the generation of currents.

Since all of the effects already explained are well known to those skilled in the art no further description is believed to be necessary for this part of the apparatus. I

In order to provide'for controlling the apparatus to shift from recording to reproducing position, and vice versa, at a distance, there is provided a cam 25, mounted for free rotation on shaft 26. The cam 25 has projecting therefrom an arm 21 which is in turn pivoted to one end of a link 28, the opposite end of which is pivoted to an arm 29 mounted for sliding movement upon a squared shaft 30, in such a manner that arm 29 may slide freely on shaft 30 but is caused to rotate therewith. The shaft 30- carries a commutator 59 which will hereafter be described and is connected to the oscillating armature 3|, having a pair of arms 32 and 33. The arms 32 and 33 are arranged to be attracted by the reproducing and recording magnets 34 and 35, respectively, the apparatus being shown in recording position.

A pair of switches or push buttons 36 and 31 are provided, the push button 36 serving to energize the reproducing magnet 34 and the push button 31 serving to energize the-recording magnet 35, through a suitable source of current, such as 38. If desired the switches or push buttons 36 and 31 may be provided in the form of interconnected switches so that only one may be closed at a time as indicated in Fig. 1. It will be understood that if the push button 36 is closed when the apparatus is in recording position, the magnet 34 will be energized, and will attract the armature arm 32 and cause counterclockwise rotation of the armature until the arm 32 is opposite the face of magnet 34. Conversely, if the push button 31 is closed and push button 36 open, magnet 35 will be energized and the apparatus will be returned to the position shown.

When the push button 36 closes the circuit through reproducing magnet 34, the shaft 30 is rotated counterclockwise thereby rotating arm 29, in the same direction and rotating cam 25 in clockwise direction. The cam is so arranged as to engage the diaphragm 40 and lift it upward,

bringing the apparatus into reproducing position A as shown in Fig. 3. Conversely, when recording switch 31 is closed the reverse operation takes place'an'd the diaphragm 40 is lowered, carrying reproducing stylus 4 out of contact with the record and bringing recording stylus 5 into engagement with the record.

If an amplifier is used, it is desirable to provide means for energizing the various amplifier circuits whenever the telephone is removed from its stand, and also to provide means for interchanging' the amplifier input and output circuits when changing from recording to reproducing position.

This may be accomplished by providing supplementary switch contacts I8I and I82. Switch contact I8I is secured to switch contact 36, and is movable therewith, by means of insulation I83, and switch. contact I82 is similarly secured to switch contact 31, by means of insulation I84.

Switch contact III is connected to the input terminal I12 of amplifier I15, and switch contact In is connected to the amplifier output terminal I15. Switch contacts I55 and I51 are connected together and through the voice winding of the recording and reproducing apparatus, diagrammatically indicated at I55, to amplifier output terminal I13, and to amplifier input terminal I'll and to ground. Switch contacts I55 and.|58 are connected together, and through the dictators telephone set to amplifier terminals HI and I13 and ground.

Amplifier I15 is supplied with operating voltage by the power supply unit I15, which in turn draws its voltage from any suitable source I19 through the transformer I18, The operation of the power supply unit is controlled by relay contact I15, actuated by coil I11 which is in series in conductor I50, which carries the motor current.

It will be seen that when the apparatus is in recording position, the dictators telephone is connected in the input circuit of the amplifier, while the recorder is connected in the output circuit of the amplifier, whereas when the apparatus is in reproducing position, these elements are interchanged.

In order to permit of back spacing or repeating small portions of the record during reproduction, a back space mechanism is provided which in the present arrangement is attached to the feed screw mechanism. The feed screw mechanism comprises feed screw I5 which is caused'to rotate whenever the record is in motion. In engagement with the feed screw I5 there is provided a continuous wormwheel I5 mounted upon shaft I1 and fixed thereon. The shaft I1 passes through a suitable bracket I8 mounted for sliding engagement upon shaft I9, and as will be understood, the sound box assembly 5 is secured in any suitable manner to the bracket I5 so as to be carried across the record by rotation of the shaft I5. The arrangement of feed screw mechanism and worm herein shown is that found in a well-known make of transcribing machine and more particularly described in Patent No.

1,979,829, granted November 6, 1934 on an application. of H. F. M. Gramann, and entitled Phonographs, to which reference may be had.

It will also be understood that cam 25 is mounted upon the assembly, driven by the' feed screw, and moves with the carriage across the record, For the purpose of providing for back spacing the shaft I1 may be provided with a ratchet 55 adapted to be engaged by pawl 5| pivoted upon armature 52 which in turn is pivoted at 53 and biased to its upward position by .spring 54. The back space magnet 55 when energized causes clockwise rotation of armature 52 and pawl 5| thereupon rotates the ratchet 55 clockwise, rotating shaft I1 slightly, and carrying the bracket I5 to the right, as shown in Fig. 2, thereby moving the carriage backward a few grooves upon the record. Ordinarily shaft I1 is held against rotation whereby rotation of the feed screw I5 causes record traversing movement of the bracket I5 as will be understood.

In order to prevent the possibility of the back space magnet 55 being energized accidentally, or otherwise, during recording, which would cause 7 dictation to be recorded upon a used portion of the record, an interlock is provided. This may take any number of forms, either mechanical or electrical, or'combinations of both, but for the sake of simplicity, we prefer to utilize commutator 59, carrying an insulating segment upon which power, suchas 51, a push button or switch and is completed through spring contact 55 to commutator 59 and thence from the shaft 59, or directly from the commutator, if desired, through back space magnet 55 to the source 51. The insulated segment 55 is so related in its position to the position of the armature 3| that the back space magnet circuit is interrupted by the commutator 59 except when the armature 3| is in reproducing position, in which case the spring 55 rests upon a conducting portion of commutator 59. When, however, the apparatus is in recording position the spring 55 rests upon the insulated segment of commutator 59 and the circuit is thus open at that point, thereby preventing actuation of the back space magnet even though the switch 55 be closed.

For the purpose of permitting change of records, it is desired to move the sound box assembly to one extremity of its travel and in order to do this, we prefer to disengage the feed screw mechanism.

However, it is undesirable to do this with the apparatus either in recording or reproducing position because of possible injury and it is undesirable to disengage the feed screw mechanism with the apparatus either in recording or reproducing position. Therefore, we provide means for lifting both the recording and reproducing styli out of engagement with the record into neutral position and we provide mechanism for disengaging the feed screw. Both of these mechanisms are provided with, an interlock which positvely prevents disengaging the feed screw mechhave been lifted out of engagement with the record. One form of such mechanism may comprise cam 15, positioned adjacent cam 25 and free for rotation on shaft 25. The cam 15 when rotated clockwise as seen in Fig. 2 engages the floating weight 52 and lifts it up out of contact with'the record, as shown in Fig. 4. As the floating weight moves upward it likewise engages the diaphragm 40 and carries the latter with it, thereby ,removing boththe recording stylus 5 and the reproducing stylus 4 from the record.

For the purpose of disengaging the feed screw mechanism there is provided a lever 55 secured on shaft 55, which is mounted for rotation. A link 51 is secured to the end of arm 55 and its lower extremity is pivoted to arm 58 engaging bracket I8. Theend of shaft 55 is placed in proximity to the lever 1| and carries secured thereto a plate 59 which is so related in size and position to arm 1| as to be engaged thereby and prevented from rotating except when the arm 1| is thrown to the position shown in Fig. 4.

Under such conditions the lever 55 may be depressed, rotating shaft 55 clockwise, lifting up link 51 which in turn rotates bracket I8 upon shaft I9 and lifts the worm I5 out of engagement with the feed screw I5, whereupon the carriage carrying the sound box and its associated mechanism may be slid freely across the record. When the record is replaced and levers 55 and 1| returned to initial position .as shown in Fig. 2, the lever 55 is then looked against rotation.

, Referring now more particularly to the circuit diagram of Fig. 1, we have shown a wiring diagram of a complete system embodying apparatus of the class described and arranged to be completely controlled by the dictator from a remote position.

The entire apparatus may be energized from line contacts 88 and BI. Additional contacts 82, 83, 84, 85, 86, 81, 88, 89, 98, 9|, 92, 93 and 94 are provided. Contacts 88 and 86 are arranged to be connected together as are contacts 8|, 82 and 81, and similarly contact 83 is connected to contact 94, contact 84 to contact 89 and contact 85 to contact 88. Contacts 98, 9|, 92 and 93 are all connected together.

The arrangement and operation of the various circuits will best be understood by considering-a typical series of operations carried on by the dictator. It will be understood that the telephone transmitter and receiver used by the dictator are installed at any convenient place and that the various switches utilized by the dictator for controlling the apparatus are placed in a position convenient to the dictator, as, for instance, on a panel board or box, or on the handle or base of the telephone. The phonograph apparatus itself may be placed in a convenient location not necessarily near the dictator.

Assuming that power is supplied to the phonograph apparatus through line contacts 88 and 8 I- and that a fresh record is on the machine, the armature 3| will be in recording position because switch 31 will be closed or will have been previously closed.

While the exact form of this switch may be varied it may comprise an operating cam I38 spring biased to the position shown and may be provided with a passing contact such that switch 31 passes through closed position whenever the cam I 38 returns to or is moved out of its normal recording position as shown.

Consequently, the apparatus is normally in position to record and is maintained out of recording position only when the dictator holds the operating cam I38 either in a position to reproduce or to repeat as will be described later.

Assuming that the dictator wishes to record a message he picks up the telephone T which may be the-conventional form of separate transmitter and receiver or may be a hand set as shown diagrammatically. When the telephone is removed from its stand, switches 91 and I8I which have previously been held in open position are closed in any suitable manner, for example, by means of springs. Closure of switch 91 energizes the circuit of microphone 9. Simultaneously the motor I2I which supplies power for rotating the record is set into operation. The motor circuit is as follows: From contact 8|, conductor I28,

motor I2I, conductor I23, contact 9|, contact 98, conductor I83, switch contact I82, switch arm I8I, conductor I88, contact 86 to line contact 88. The flow of current in conductor I88 energizes coil I11, closing relay I16 and supplying power to the power supply unit I15, which in turn energizes the amplifier I18.

Simultaneously, power is supplied from contact 8| through conductor I24, lamp I25 to switch I28, which is closed by a record when the latter is in operative position upon the mandrel but is otherwise open, thence through switch I21, thence to conductor I83, contact I82, switch arm I8l, conductor I88, contact 88, to line conductor 88. Switch I21 is associated with the movable friction brake disc of a conventional motor speed governor so that it will be closed by such disc when the motor reaches speed but otherwise-is open. Consequently, lamp I25 will be illuminated when the telephone is removed from its stand, 9.

record is on the mandrel, and the motor is operating at speed. Should any of these conditions not obtain, the lamp I25 will be dark and the dictator will be warned that the apparatus is not in condition to record.

Also, power is supplied to lamp I31A, thence through conductor I38, to commutator I39, thence through conductor I48, to conductor I83 and back to line contact 88. The commutator I39 may be mounted upon shaft 38 and is so arranged that when armature 3| is in recording position commutator I39 completes the circuit between conductor I38 and conductor I48, energizing the recording lamp I31A. If the armature 3| is in reproducing position commutator I39 opens the circuit through lamp I 31A and closes the circuit through the reproducing light I31B, conductor I4I, commutator I39 and conductor I48.

Therefore, after picking up the telephone the dictator will wait until --lamps I25 and I31A light, indicating that the apparatus is in readiness to record. He will also observe lamp I54 which is arranged to be lighted when the record is nearly completed, the circuit being as follows: conductor I24, lamp I54, conductor I55, switch arm I56, switch contact I51, resistance I58, conductor I41 to conductor I83, thence through switch IM to the other side of the line. If the lamp I54 is not lighted the dictator may begin his dictation. His first act will be to press the push button PB which may be mounted upon the handle of the telephone. The push button separates contacts I88 and I81 and closes contact I 88 against contact I 88, thereby completing a circuit which causes operation of suitable clutch mechanism (not shown) to connect the driving motor to the mandrel, causing rotation of the record. The circuit is as follows: contact 8| to contact 82, conductor I85 to contact I86, contact I88, conductor II8, contact 85, contact 88, conductor I I I through clutch magnet II4A, contact II3, switch arm II2, conductor II5, contact 92, contact 98, conductor I83 and thence to line terminal 88. The energization ofclutch magnet II4-A attracts armature and switch arm II2 moving it to the position shown in dotted lines and simultaneously interrupting the circuit through clutch magnet II4A and preparing the circuit through declutching magnet I I4B.

The clutch mechanism is not shown and the details of the armature and contact arm II2 are not shown since both of these are well known in the art.

Reference may be had to the Langley Patent No. 1,380,486, dated June 7, 1921, for details of the clutching mechanism.

The record is now rotating under the sound box and any material dictated will be recorded. If the dictator wishes now to hear what has been dictated he operates switch control I38 opening switch 31 and closing switch 38 against the contact 36A, whereby power is supplied through conductor I33, reproducing magnet 34 and conductor I32 to return conductor I 83, moving armature 3 I to reproducing position, thereby open-. ing the circuit through recording lamp I31A and closing the circuit through reproducing lamp I31B, and interchanging the input and output circuits of the amplifier. Further operation of the switch control I38 closes contact 36--A against contact 38-3, thereby supplying power to conductor I 34 to contact 83 to contact 94, conductor I35, through back space magnet 55 through commutator 59, conductor I38 to contact 93 to contact 98 and return conductor I83,

conductor I03, energizing the correction relay,

attracting its armature which is provided with a pencil or other suitable apparatus for marking upon a slip or index provided for the purpose. 15 Such apparatus per se is'described in Patent No. 1,278,565, to E. B. Basch ,issued September 10, 1918, to which reference may be had. After completing the correction the dictator continues. At the termination of the first message, to

20 indicate its completion, he closes switch contact I42 against contact I42, thereby supplying power to conductor I44 and energizing relay I45, attracting its armature and making a mark for the end of the message. Further operation of con- 25 tact I42 closes contact I48 supplying power to biased to neutral position so that normally none of these switches is closed. It may be in the form of a cam which when rotated in one direction causes closure of the correction switch and when rotated in the other direction from neutral posi- 35 tion first causes closure of the length switch and on further rotation, closure of the rush switch. The dictator may then continue with other messages as will be understood. As the carriage approaches the end of its travel on the record, 40 switch contact I56 is brought into engagement with contact I51 thereby closing a circuit through finish lamp I54 as already described, warning the dictator that the record is nearly finished. Further travel of the carriage closes contact I51 45 against contact I50, thereby short-circuiting resistance I50 and causing lamp I54 to burn more brightly indicating that no more dictation can be recorded upon the record in use. The dictator then releases push button PB permitting contact 50 I06 to separate from contact I08 and to close against contact I01, thereby supplying power to conductor I00, to contact 04, declutching magnet I I4B, through line I I to contact 92, to contact 00, to return conductor I03, energizing the de- 55 clutching magnet and returning switch arm and armature II! to the position shown in full lines, thereby interrupting the circuit through declutching magnet I I4-B and preparing the circuit through clutching magnet I I4--A and declutching 60 the-mandrel from the driving motor.

' The dictator then replaces the telephone upon its stand, opening switches 01 and IN, thereby de-energizing the microphone and driving motor andamplifler circuits respectively. The dictator 65 may then wait a few moments to permit time for an attendant to replace the completed record with a fresh record and may then take up the telephone in preparation for continuing his dictation.

While we have shown herein only a single ma- 70 chine, it will be understood that two phonographs may be utilized provided with interconnecting circuits for continuous recording as described in the copending application of C. Huenlich, Serial No. 581,870, assigned to Thomas A. Edison, In-

75 corpora-ted, by means of which the necessity for the dictator to hang up his receiver to permit of change of records is eliminated and continuous dictation over as long a period as may be desired is possible.

While we have shown and described certain 5 preferred embodiments of our invention, it will be understood that modifications and changes may be made without departing from the spirit and scope of our invention as will be apparent to those skilled in the art.

We claim: i

1. In a dictating machine, in combination, a record holder, sound recording and reproducing apparatus selectively shiftable to neutral, recording and reproducing positions with respect to a record on said holder, remotely actuatable con- I trol means operable to eiifect the shifting of said apparatus to either recording or reproducing position, a control device actuatable independently of said control means for shifting said apparatus to neutral position, feed mechanism for causing said apparatus to advance across said record upon rotation thereof, means for disengaging said apparatus from said feed mechanism, and means adapted to coact with said control device posi- 5 tively to prevent such disengagement when said apparatus is in recording orreproducing position.

2. In a dictating machine, in combination, a record holder, sound recording and reproducing 3 apparatus selectively shiftable to neutral, recording and reproducing positions with respect to a record on said holder, remotely actuatable control means operable to effect the shifting of said apparatus to either recording or reproducing position, a control device actuatable independently of said control means for shifting said apparatus to neutral position, feed mechanism for advancing said apparatus across said record with rotation thereof, means for disengaging said apparatus from said feed mechanism and comprising an actuating lever, and means associated with said lever and adapted to coact with said control device positively to prevent actuation of said lever when said apparatus is in recording or reproducing position.

3. In a system of the character described having a record support and a movable speed governor element, a phonograph, a dictators station comprising means for causing operation of said phonograph, an electrically operable signal, an energizing circuit for said signal, and a pair of normally open switches included in said circuit, one of said switches being associated with said record support so as to be closed by a record only when the latter is operatively positioned on such support, and the other of said switches being associated with such governor element and adapted to be closed by such element only when the latter reaches a position corresponding to suitable recording speed of the phonograph.

4. In a system of the characterdescribed, a phonograph having a rotatable record support and a speed responsive device, an energizing circuit for a part of said system, and a pair of normally open switches included in said circuit, one of said switches being associated with said record support so as to be closed by a record only when the latter is operatively positioned on said support, and the other of said switches being associated with said speed-responsive device to be closed by the latter when said phonograph is driven at not less than apredetermined speed.

5. In a system of the character described, a phonograph adapted to record and reproduce seor the. above numbered patent requiring correction as follows :v Page 5, second column, line 1+9, c1aim5, strike out the commiiiandwords a phonographw and a speed-responsive device, a dictators station comprising means actuatable to cause the operation of said phonograph and the termination of operation thereof and means operable to cause the shifting of said phonograph from re- "cording to reproducing position and vice versa,

when the phonograph is operated at not less than a predetermined speed.

- 6. In a system of the character described,

phonograph adapted to record and reproduce selectively and having a rotatable record support and a speed-responsive device, a dictator's station comprising means actuatable to cause the operation of said phonograph and the termination of operation thereof and means operable to cause the shifting of said phonograph from recording to reproducing position and vice versa.

P t nt-r0, 2,092,917.

lectlvely and having a rotatable record support,

means for giving at said station an indication that the phonograph is in the recording position, an independent signal at said station, an energizing circuit for said signal and a pair of normally open switches included in said circuit, one of said switches being associated with said record support so as to be closed by a record only when the latter is operatively positioned on such support and the other of said switches being associated with said speed-responsive device and adapted to be closed thereby when the phonograph is operated at not less than a predetermined speed.

7. In a system of the character described, a phonograph having a record support and a sound box carriage arranged for relative traversing movement in respect of a record on such support. a dictators station remote from said phonograph and comprising means for controlling the operation of said phonograph, electrically operable signaling means at said station, and apair of normally open switch devices disposed in the path of such traversing movement of said carriage at points respectively corresponding to proximity to the end of the record and to the end of the record, each of such switch devices being in circuit with said signaling means.

CHARLES HUENLICH. HEINRICH F. MAX GRAMANN.

, CERTIFICATE OF CORRECTION September 11+, 1957.

CHARLES HUENLICH, ET AL.

g a It is'hereby certified that error appears in the printed epecificati.on'

,insertthe same after "described in line 1 .7, same claim; and that the said L'etters Patent should be read with this correction therein that the sauce may ccnformto' the record of the case inthe Patent Office} I I Signed andsealed this 25rd day or November, A. D. 1937.

(Seal) Henry Van Arsdale Acting Commissioner of Patents.

' or the. above numbered patent requiring correction as follows :v Page 5, second column, line 1+9, c1aim5, strike out the commiiiandwords a phonographw and a speed-responsive device, a dictators station comprising means actuatable to cause the operation of said phonograph and the termination of operation thereof and means operable to cause the shifting of said phonograph from re- "cording to reproducing position and vice versa,

when the phonograph is operated at not less than a predetermined speed.

- 6. In a system of the character described,

phonograph adapted to record and reproduce selectively and having a rotatable record support and a speed-responsive device, a dictator's station comprising means actuatable to cause the operation of said phonograph and the termination of operation thereof and means operable to cause the shifting of said phonograph from recording to reproducing position and vice versa.

P t nt-r0, 2,092,917.

lectlvely and having a rotatable record support,

means for giving at said station an indication that the phonograph is in the recording position, an independent signal at said station, an energizing circuit for said signal and a pair of normally open switches included in said circuit, one of said switches being associated with said record support so as to be closed by a record only when the latter is operatively positioned on such support and the other of said switches being associated with said speed-responsive device and adapted to be closed thereby when the phonograph is operated at not less than a predetermined speed.

7. In a system of the character described, a phonograph having a record support and a sound box carriage arranged for relative traversing movement in respect of a record on such support. a dictators station remote from said phonograph and comprising means for controlling the operation of said phonograph, electrically operable signaling means at said station, and apair of normally open switch devices disposed in the path of such traversing movement of said carriage at points respectively corresponding to proximity to the end of the record and to the end of the record, each of such switch devices being in circuit with said signaling means.

CHARLES HUENLICH. HEINRICH F. MAX GRAMANN.

, CERTIFICATE OF CORRECTION September 11+, 1957.

CHARLES HUENLICH, ET AL.

g a It is'hereby certified that error appears in the printed epecificati.on'

,insertthe same after "described in line 1 .7, same claim; and that the said L'etters Patent should be read with this correction therein that the sauce may ccnformto' the record of the case inthe Patent Office} I I Signed andsealed this 25rd day or November, A. D. 1937.

(Seal) Henry Van Arsdale Acting Commissioner of Patents.

Images