US2072316A - Teledictaphone - Google Patents

Description

March 2, 193.'.7. o. H. scHuLz TELEDICTAPHONE Filed Aug. 28, 1934 2 Smets-sheet 1 Imi.

Qc?? ATT RNEY March 2, 1937.

TELEDICTAPHONE y Filed Aug 28,' 1954 2 Sheetsv-Shee't 2 N54 INVENTOR I BY Patented Mal?. 2, v1937 1 UNITED.l STATES PATENTy OFFICE v TELEnIcTAPHoNE 'otto n."scnu1z,'oak`1ana, Cain.' Application August 28, 1934, Serial No. 741,165 l i 22 claims. (ci. 11e-s) v This invention, an automatic tele-dictaphone,

l combines al1 of the advantages of the telephone and dictaphone, automatically converting the -usual telephone into a voice recording device 5 when the party called does Ynot answer the telephone, and permitting a message'to be delivered `inthe absence of the party called.

Thisinvention is useful in many ways and under many conditions,since it is designed'to y .l permit the delivery of messages, telegrams, leta record of their-call, an executive may dictatev v letters from his home `orany remote point to his oilice, or a telegram may. be` recorded without.

waiting for an Aanswer to the telephone. i Under existing methods it is necessaryto arrange specialA connections, suchv as connecting the j l in its simplest -iorm as associated with a twotelephone receiver to' a dictaphone, -or'set predetermined switches-to obtain a record of a call,-

necessary connections when two telephone sets provided with this invention are llinked together either directly of through a central station.

' The voice recording device may be remotely located relative to the telephone or may be installed inthe same cabinet with the telephone, and after a message is recorded, the entire arrangement resets itself to normal position ready iii for another call. l y

The objects of the invention are as follows: First; to link two telephone sets together with necessary equipment for automatic recording of `me`ssages in the absence of the party called. 40 Second, To associate a telephone anda voice recording device in such manner thatwhenno answer is obtained from a party called on the telephone within a predetermined period or number of signal impulses, thatvthe voice recording devices. will be automatically, coupled to the` callers telephone set, sov that a message may be delivered to a record in the form o! a cylinder, disc, orillm.

50 Third, To provide means for disrupting the operation of the voice recording device at any.

erative position ready for anotherV call when the caller hangs up their receiver. r Fifth, To provide meansi'or couplingvsuch voice recording device to any type of wired or wireless telephone or telegraph for operation by a pre' 5 determined vsignal or series of impulses.

Sixth, To provide' means where great amplitude is required, foramplifying the voice modulations to the recording' device.

Seventh, Toprovide means for automatically q() maintaining the recording device or recorder out of contact with the recording medium at all times when the recording device is not controlled by a callers telephone. Y

l Other objects and advantayesof the invention will become apparent as the/'following description is read on the drawings forming a part of` this spec cation, and in which similar reference characters are used to designate similar parts through-A out the several views, of which: 20

Fig. l' is a wiring diagram of the invention shown subscriber magneto line of the bridging type. Fig. 2 is a detail view of the operating pawlV connection.

Fig. 3 is a fragmentary view of the selector disc showing the teeth and idle space for limiting the movement of the disc or ratchet.

Fig. 4 is a4 modifiedfo'rm of wiring diagram adapting the invention to telephone circuits which include aseries condenser. f

. Fig. 5 is an amplifying diagram for amplifying the voice modulations.

Fig. 6 is a wiring diagram of a wireless'or radinl receiving circuit with the invention applied 35 thereto. v l The invention includes any type of wired or wireless telephone circuit, such as magneto, common battery, automatic, or other modified forms and is applicable to any type or arrangement by 40 modification of the equipment andwiring to suit the specific hook-up, and consists of a switching arrangement automatically actuated by the signaling system or the telephone set or readio transmitter of the caller or person calling, con- 45 *necting a voice or sound recording device in circuit with the callers telephoneset or radio v transmitter, so. that a vmessage may be delivered without the presence of anyone at the answer phone or receiving circuit. 1

I3, the central oflice equipment not being shown other than the above-mentioned plugs, cords and jacks. The radio circuit consists of a transmitter, anda receiver tuned to the same frequency.

The two telephone sets are identical, one telephone set consisting of a transmitter I4', a receiver I5, a receiver hook I6 and such other apparatus, coils, condensers and batteries as may be required for the particular type of circuit, and is designated as the Caller phone, and the same parts on the Answer phone are designated by the characters I1, I8 and I9, the caller telephone being designated by the letter .C, and the answer phone by the letter A, The circuit between the two telephone sets is completed through the wires 20, 2l, 22, and 23.

The circuit also includes the call bells 24 and 25 for telephone operation over wired circuits, and which bells may be operated by the magneto 26 or by the central station operator, or automatically, depending on the system of wiring.

In the wiring diagram, Fig. 1, it will be noted that the caller's receiver I5 is removed from the hook I6 permitting the hook to bridge the circuits to the transmitter I4 'and receiver I5 through -contacts 28 and 29, while the answer telephone hook I9, being depressed by the weight of the receiver I8,` maintains the circuit to the transmitter I1 and receiver I8 open, contacts 30 and 3l being open. Obviously, the hook actually operates a switch Afor making these contacts and which switch is omitted for purposes of clarity.

Ihe parts so far described are standard and do not form a part of the invention except in the combinations described and claimed, and the circuit so far described is only modified for this invention by the inclusion of selector means in the signaling circuit andy the extension of the main line circuit.

The automatic selector means may be applied i I to one or both telephones, as it is not necessary for any telephone set to have the selector to operate the selector of another phone, however, in the wiring diagram, both sets are shown equipped therewith, so asto fully explain the mutual operation between two sets.

.The automatic I'selector means is identical for each telephone set where the voice or sound recording device is installed land consists respectively of the relays 32 and 33 having one terminal connected through wires 34 and 35 respectivelyA to the terminal telephone lines 20 and 2I as indicated at 36 and 31, their 4other terminal being in series with the respective contacts 38 and 39 through wires 40 and 4I. It will be noted that no source of current is included directly in the circuit between the two relays 32 and 33, and when the two hook levers I6"and I9 are both depressed, that both relays are grounded by cooperation of these levers through a ,suitable switch (not shown) with the contacts 38 and 39.

'I'he primary circuit for the relays consists of the respective batteries 42 and 43 having one terminal connected respectively to the connections 34 and 35, and the other terminal connected to the contacts 44 and 45 which cooperate with the receiver hooks in their raised or released position. Thus the battery 42 completes a circuit current can only iiow when one receiver hook is depressed and the other released;

The relay secondary circuits consist of the armatures 46 and 41 which are respectively connected through wires 48 and 49 to contacts 50 and 5I for cooperation with the receiver hooks I9 and I6 in depressed position, and the armature contactsV 52 and 53 are connected through the respective batteries 54 and 55 to one terminal of the respective electro-magnets 56 and 51 through wires 58 and 59, the other terminals 60 and 6I being connected to ground 62. The armatures 63 and 64 are normally retracted by the springs 65 and 66, the armatures normally maintaining the respective stop pawls 61 and 68 and operating pawls 1I and 12 out of engagement with the respective selector ratchets 69 and 10.

The pawls cooperate with the armatures through the connectors 13 and 14, which are slotted at one end as shown at 15 in Fig. 2, the pawls beingurged by the springs 16 to cooperate with the ratchetsv when brought into association by the armatures.

The pawl operating mechanism consists of the respective electro-magnets 11 and 18 connected through wires 19 and 80 in series with the signaling or bell ringing circuits 8I-82 and through wires 83 and 84 to the return or ground side' 22-23 of the vtelephone circuit. The respective pawls 1I and 12 are connected to the terminal ends of the armatures 85 and 86 of the electromagnets 11 and 18 and are reciprocally operated thereby.

The ratchets or selector discs 69 and 10 are each provided with a multiplicity of fine teeth 81 as shown in Fig. 3, the pitch being approximately equal to the stroke of the armatures at the point of connection whereby'each impulse advances the ratchet one tooth. These discs are resisted by' springs 88 and 89 which return the ratchets to their normal position when the pawls are released.

'I'he switching mechanism for the voice or sound recording device'consists of quick-throw switches 90 and 9I, which cooperate with the pins 92 and 93 on the respective ratchets 69 and 10 and close to contacts 94 and 95, these switches being connected to one terminal of a source of current, such as a power line 96, the other terminal 91 of which is connected to the respective contacts 94 and 95 through the respective primaries 98 and 99 of transformers |00 and IOI. It will be understood that battery circuits may be used, and all magnets and relays are adapted to the specific currentvused, whether direct or alternating, and the speciflc current will be used which is best adapted to the specific circuit, since in some cases an alternating current may be desirable using alternating current magnets and relays, while other cases may be best suited to direct current with direct current magnets and relays.

The voice or sound recording means consists of recording devices |02 and |03, which1 may be' of the Dictaphone type or any othenwell known type such as a magnetically actuated diaphragm operating recording needles or points |04 which cooperate with the record blank, such as cylinders |05 and |06, and which cylinders are driven by the respective motors I01 and |08, these motors being shown as driven through the medium of the secondary current set up in the secondaries 2109 and IIO of the transformers I00 and IOI,

fthrough wires III and II2, suitable reduction gearing (not shown) being provided between the motor and the cylinder, this recording means being l emana.

of conventional type and not requiring detailed descriptiom In connection with the above, it will be understood that photographic film may also be used for the record blankwith the record formed through the medium of a photo-electric cell, and which process is also well known.

The recording devices I02 and II|3 are normally maintained out of cooperation with the record blank or cylinders I t5 and |06 by means ofv armature levers II3 and IIIi which are pivotally .mounted at H5 and II6 and retracted by the springs |I1 and IIt, these armatures being in cooperative relation to the electro-magnets II@ and 'which'are connected in circuit with the isecondaries I 09 and III) of .the transformers It@ and IilI as shown.

I The voice recording circuit consists of relays IZI and I22 which are also connected' in circuit with the secondaries It!! and |Ili of the transfarmers IUI) and IIJ I, the armatures of these relays closing a circuit across the telephone circuit 2li- 2i and 22--23 through wires |23 and' l IM, and |25-I26.

The circuit so far described is but one form of circuit using both direct' and alternating current electro-magnets and relays, and showinga completely operative circuit, the operation 1 of whichv 1 is' as follows; 2,

With both receivers I5 and I8 hung on their respective receiver hooks, all circuits are broken. One receiver I5 is removed from the hook It, as shown, closing the circuit to the receiver I5 and transmitter I4, and coincidently closing the circuit through contact 45, battery d3, line 2 I, calling the operator O at'the central station, who completes the circuit through'v jacks I2-'I3 by means of cords I I and plugs It, (or the circuit is automatically completed with automatic systems) 40 through wire 2|), wire 34, relay 32, contact 32,

hook I9, line 22-23 or ground, to hook It.

Energization of relay 32 closes the 'circuit through hook It, wire 48, armature 46, contact 52, battery 54, magnet 56, wire 60, to ground 52,.

drawing armature 63 down and releasing pawls 61 `and 1I to cooperate with ratchet 69. Caller C or operator O vthen by suitable means, such as' magneto 21 rings subscriber or answer party A in the usual manner, the impulse passingthrough the signal or bell circuit 25, 4wire 8I-19, through magnet 11 and wire 83 oscillating armature 85 and pawl 1|, rotating disc 69 against the resistance of spring 88, the 'pawl 61 retaining the disc against retrograde movement. It` during the courseof the ringing receiver I8 should be lifted, the circuit to magnet 56 will be broken at contact '5t and the spring 65 will release the pawls from the ratchet' and the ratchet will immediately return to its normal position under the urgence of 28.

60 I'f the call is not answered and the receiver remains on the hook, the ratchet is rotated untilv pin 92 engages the switch 90 which is urged until the shifting spring |21 throws-the switch to contact 94, following'whch, the pawl 61 rides in the idle space |69, preventing further movement of the ratchet, but preventing its release, and as this' pawl 'does not pick up the stroke of the pawl 1I, I the ratchet/idles in its position, and remains in that'position until either the receiver I8 is lifted off its hook, or the receiver I5 is placed on its hook. Switch 90, closing tocontact 94 lcloses the main power circuit through the primary 98 of transformer' |00', inducing a current in the secondary which starts and operates motor |01, coincidently,

rotating theirecord |05. simultaneously energizthe f ace of the blank I o5, the recording dispara @br coil and point together with the frame .IM which is hinged at Iza, gravitationally cooperatir'ig with the cylinder or blank |05.

. i ing magnet I It, which draws armature I Ido'wn', 1 bringing the recording point IIIA in contact Coincidently, magnet I 2| is energized, closing the voice or sound circuit to the recorder through wire I23, contact i3d, armature I3I, recorder IM,

and wire mi to une r2.

The recording device is now in operation and caller C delivers their message which is recorded on the cylinder, after which caller hangs up their receiver' I5, therebyA breaking the circuit at d5, de-energizing relay 32, breaking circuit at 52 and through magnet v56, releasing armature 63 which is retracted by spring 65, retractinggpawls 61 and lI, eleasing ratchet t@ which is lcounter-rotated by spring tt, p in t2 in its counter-movement engaging the opposite side of lever |32 and reversing switch tt, breaking contact at et, disrupting e operationy of motor IIN, releasing armature I Itto interposed condenser i3d will not permit operation of the recorder selector byV direct current, such la circuit requiring an alternating current for operation of thevselector.Y

The modication also includes manually con-y trolled means fonoperating the selector.

This modication consists of the usual transmitter I1, Areceiver It, hook I9, together -with the line IM having the condenser |33 in series. The selector means consists of the alternating current magnet Ict which is connected in series through contact |56, wire Itli, battery |38, magnet |35, wire |39, armature III), make-'and-break'` contact Iti, primary IM of transformer M3, switch IM to ground or lever M5. Each time switch I M is 0H the hook, a series of impulses is Ptransmitted to operate the selector. at the other stationthrough the secondary-- Idt, line Idd and conden ser |33, operating the magnet 1t. The balance of the circuit is similar to that described for Fig. l. f v

In Fig. 5, a modication is shown in which the voice modulations areamplified, the modulations being transferred from the induction coil primary Itl to the secondary IM which is tuned to a predetermined frequency by thecondenser H9', the modulations being impressed on' the grid |50 of theradioamplifying tube I5'|,Jthe incoming' s closed while receiver I 8' sov modulations being amplied inthe customary y manner, the plate |52 being connected through suitable audio frequency transformers |53 and succeeding stages of amplification to the recorder W2, a suitable current supply 54 being provided. v This diagram also shows a r producer |55 which vmay be incorporated for manual cooperation', the usual operating means and switch means (not es I shown) being incorporated therewith. With this arrangement, the messages may be reproduce without removal of the record. Fig. 6 is another modification showing the invention as applied to radio or wireless transmission, using any standard transmitting and receiving circuits, and modifying them to suit the particular hook-up, a simple radio frequency receiver being shown. u

A simple arrangment is shown in which a carrier wave |56 is first impressed on the antennae |51 and transferred from the antenna coil |56 to the grid coil `|59 which is tuned by means of the condenser |60 to the frequency of the incoming wave and left at this setting, this incoming carrier current being amplified through suitable radio tubes |6| and |62 and transformer |63 to plate 64, the circuit so far described being standard, and well known in the art. v

When the receiver hook I9 is depressed, plate |66 is connected in series with a sensitive relay |65, battery |66, electromagnet 11 to ground |61, closing a circuit through the receiver hook I9, armature 46, battery 54, electromagnet 56, bringing the pawls 61 and 1| into engagement with the disc or ratchet 69.

The frequency of the incoming wave is too high to affect the driving pawl 1|, and the eifective pull of the electromagnet is made. such as to operate the vpawl only under intensified current and therefore is actuated only by modulations or audio frequency impulses.

When a series of dots |66 or impulses, (which may be made kin the form of a specific signal if desired) is impressed on the antenna, the audio frequency fluctuations and intensity of current set up by the modulations operate the selector magnet 11, operating the selector as previously described.

In all other respects the device is operated similarly to those previously described. After the selector has attained a predetermined position after throwing the switch, it cannot be moved farther due to the omission of teeth at one point |69, which prevents operation of the pawl, and

y voice, sound, code, or telegraph signals may be recorded.

When the wave length or frequency of the transmitting station is changed, the device automatically returns to its normal position, resetting itself, and lifting of the receiver hook automatically disrupts operation of the selector.

It will be noted that with the receiver on ho'ok I9, (Fig. 6), a circuit is closed from plate |64 through wire |10, switch |1|, contact |12, through magnet |65 and recorder |02 in parallel to battery |66, and coincidently, with energization of magnet |65, another circuit is closed through the receiver hook i9, armature 46, battery 54 to place the pawls in cooperation, and that when the receiver hook is released, the circuit to the magnet |65 is broken as also to magnet 56, and a circuit completed through plate |64, through switch I1 contact |13, receiver or loud-speaker |14 to battery |66, so that the recorder is made inoperative when the message is audibly received.

It will be understood that variations in method, circuits, adaptation, arrangement and equipment, which variations are consistent with the appended claims, may be resorted to without detracting from the spirit or scope of theinvention or sacrificing any of the advantages thereof.

I claim.

1. In. combination, two telephone sets and a circuit therefor, a voice recording device includ- `ing an electrically actuated recorder in cooperative relation to one set, means made operative by release of the receiver hook of the other set and inoperative by the release of the receiver hooks of both sets and actuated by electrical impulses set up in the signaling system for the one set electrically associating the other telephone set with the recorder of saidrecording device when the receiver of the one set remains unreleased for a predetermined signaling period, and made inoperative and causing the means to return to normal position when the receiver hook of the other set is depressed.

2. In combination, two telephone stations each including transmitter, receiver, signaling device, receiver hook, a sound recording device including an electrically actuated recorder, and selective means selectively associated with the depressed and raised positions of the receiver hooks and actuated by electrical impulses in the circuit of the signaling device, associating one telephone set exclusive of sound recording device with the recording device of the vother set and exclusive of the transmitter and receiver thereof when the signaling device of the other set remains unanswered for a predetermined oscillatory period of said signaling device.

3. In combination, two telephone stations each including transmitter, receiver, signaling device,

receiver hook, a sound recording device including an electrically actuated recorder, and selective means selectively associated with the depressed and released positions of the receiver hooks and actuated by electrical impulses in the circuit of the signaling` device associating one telephone station exclusive of its sound recording device with the recording device exclusive of the transmitter and receiver of the other station when the signaling device of the other station remains unanswered for a predetermined oscillatory period, and disrupting the operation of the selective means and permitting its return to normal position when the signaling device of the other station is answered, and means for returning the selective means to its normal position.

4. In combination, two telephone stations each including transmitter, receiver, signaling device, receiver hook, a sound recording device including an electrically actuated recorder, and selective means selectively associated with the depressed and released positions of the receiver hooks and actuated in association with electrical impulses in the circuit of the signaling device associating one telephone station exclusive of its sound recording device directly electrically with the recording device of the other station exclusive of the other elements of the other station when the receiver of the other station remains inoperative for a predetermined signal period, and disrupting the operation and resetting the selective means to normal position when the receiver of the other station is operated, and disrupting the operation and resetting the selective means when the cooperative relation of the two stations is terminated.

5. In combination, two telephone sets and a circuit therefor, each set including a transmitter, a receiver, a receiver hook and a signaling system, a sound recording device including an electrically actuated recorder and a record blank for each set, a selective switch for each set controlling the recording device associated therewith andy with the recording device of the one set and opertem.

` Verating the device C Y ating the device through a suitable source of cur- 'rent controlled by the selector switch.

6. In combination, two telephone sets and a circuit therefor, each set including a transmitter, a receiver, a receiver hook and a signaling sysa voice recording device including. an electrically actuated recorder and a record blank for each. set, a. selector switch for each set controlling the recording device associated therewith and controlled by the receiver hooks, said selector switch lbeing actuated by electrical impulses set up in the' signaling system of one set, said selector switch automatically electrically connecting the one set directly with. the recorder of said recording device oi the other set and opthrough a suitable source of current controlled by the selector switch, and

y:means rescttingsaid selector switch k-to normal position and disrupting the current when operation of the Ione set is discontinued. 7. in combination, two telephone sets and a circuit therefor, each set including a transmitter, a4 receiver, a receiver hook and a signaling system, a sound recording device inpluding an electrically actuated recorder and a record b for each set, a selector switch ior each set conytrolling the recording device associated therereceiver hooks, said with and controlled by the selector switch being actuated by electrical impulses set upin the signaling system ofthe other set, said selector switch automatically electrically connecting the other set directly with the recorder oi' said recording devlceioi the one set and operating the recording device through a suitable source oi current @controlled by the selector switch oli, the one set, and meansresetting the selector switch to normal position and disrupting the source of current when the receiver ho'ok or the one set is released as by answer of the signal of the si system oi the other set. i

8.1m combination, two circuit therefor, each set including a transmitten; a receiver, a receiver hook and a signaling system, a sound recording device including an telephone sets .and a A electrically.actuatedrecorder and a record bl hooks are in any o pressed position oi the one set and the raised posifor each set, a selector switch for each set con-I trolling the recording device4 associated therewith and controlled by the receiverV hooks, said selector switch being actuated by electrical impulses set up in the signaling system oi" the other set, said selector switch automatically electrically connecting the other set directly with the recorder of said recording device oi' the one set and operating the recording device through a suitable source oi current controlled by the selector switch of the-one set when the si system remains unanswered, and means resetting the selectorswitch to normal position and disrupting the source of current when the receiver ther position than the detion oi the other set. 4

v9. In combination, two sound transfer sets,` each including sound' transmitting means and sound receiving means and associated talking circuit, signaling each set in circuit with the talking circuit: sound recording means including anv electrically actuated recorder i'or each'set; connective means' for each set controlled by the control means and actuated byelectrical impulses oi the signaling mean electrically connecting one set exclusive of its recording means directly with the recorder of the other set through means and control means iorr the talking circuit after ,sie 5 a. predetermined number ci impulses, while the other set, exclusive of-its recording means is in normal inoperative relation, said connective means being made inoperative through the control means by` any change in electrically coop- 5 erative relation of the sets from that o f the one set calling and the call being unanswered by the other set.

l0. In combination with two stations linked by ga talking circuit including a signaling sys, lo and a switch ior each station controlling the talking circuit, control means in parallel with each station and controlled by the switches of both stations, asound recor system including an electrically actuated 4recorder ior each i5 station, a current supply ior each recor system, a ,selector controlled by each control means and electrically actuated in'circuit with the signaling systemL completing circuit between the recording system and its current supply at one go station and coincidently cutting the recorder directly in circuit with the ng circuit to the other station, saidcontrol means disrupting opb eration of the recording system when the switches at both stations are both in either open or closed 2s position, and permitting actuation oi' the selector .means only when the switches are respectively in own and closed positions.

11. In combination with two telephone stations -linked by a talking circuit and including a siggo naling system and a receiver hook tor each station; a sound recording system including an electrically actuated recorder, a record, and a current supply for each station, means actuated in circuit with the signaling system completing gg circuit from the current supply tothe recording system and coincidently cutting the recorder directly into the circuit at one station when the receiver hook at said one station remains depressed and the receiver hook other station is released and means resetting th'e selector means when saidrecelver hooks are both, either released, or depressed. l2. lnoombination with two telephone stations v i byl a talmng' circuit and including a signal- 45 ing system and a receiver hook ior each station, a sound recording system including an electrically actuated recorder, a record, and a current supply, ior each station; means actuated in circuit with current supply to the recording system and coincidently cutting the' recorder directly into the talking circuit at one station and moving said recorder into cooperation with said record when the receiver' hook at said one station remains de- 55 pressed and the receiver hook at the other station is released, and means automatically resetting the selector means and moving the recorder out ci cooperation with the record when said receiver 'boom are both, either released, or depressed.

. i3. In combination with two telephone stations linked by a talkingcircuit and including a signaling system and' a receiver hook for each' station;v a sound recording system including an electrical Y actuated recorder, a record, and a current supply, @5

ior each station, control means electrically associated with each station controlled by the receiver hooks ol both stations, selector means actuated in circuit with the signaling system and controlled by the control means, completing circuit from the 70 at the 40 i. t 1 ng .system completing circuit trom the 50 tot 2,072,816

means resetting the selector means when said receiver hooks are both, either depressed, or released.

14. In combination with two telephone stations linked by a talking circuit and including signaling means and a circuit therefor and a receiver hook for each station; a sound recording system including an electrically actuated recorder, a record, and a current supply for each station, control means electrically associated with each station and controlled by the receiver hooks of yboth stations, selector means actuated in circuit with the signaling means and controlled by the control means completing circuit from the current supply to the recording system and coincidently cutting the recorder directly into the talking circuit at one station and moving said recorder into cooperation with said record when the receiver hook at said one station remains depressed and the receiver hook at the other station is released, and means resetting the selector means and moving the recorder out of cooperation with the record when said receiver hooks are both, Ieither released, or depressed.

l5. In combination with two telephone stations including a talking circuit and a signaling system, and a switch having two sets of contacts associated with each station; an automatic sound recording system including an electrically actuated recorder, a record, and a current supply, for each station; means electrically associated with the signaling system and controlled by the switches of both stations connecting the sound recording system of one station with its current supply and coincidently connecting the recorder of said one station directly across the talking circuit after a predetermined period of signaling from the other -station while the switch vof said one station is closed to one set of contacts and the switch of the other station is closed to the other set of contacts, changing the relation of either or both switches automatically returning the sound recording system to normally inoperative position and reset for a future call.

16. In combination with two telephone vstations including a talking circuit and a signaling system, and a receiver-hook-actuated switch having two sets of contacts associated with each station; an automatic sound recording system including an electrically actuated recorder, a record, and a current supply, for each station; control means electrically associated with the talking circuit and controlled by the switches of both stations; sclector means including switch means and `electrically associated with the signaling system and controlled by the control means associated therewith connecting the sound recording system of one station with its current supply and coincidently connecting the recorder of said one station directly into the talking circuit after a predetermined period of signaling from the other station, and coincidently moving-the recorder into cooperation with said record, and maintaining said kconnections while the switch of said one station is closed to one of its sets of contacts, and the switch of the other station is closed to the other of its set of contactsychanging the relation of 'either or both switches automatically returning the sound recording system and associated control and selector means and recorder to normal inoperative position and reset for operation with a future call.

17. In combination with two telephone stations including a talking circuit and a ringing circuit, and a receiver hook for each station; a magnetically actuated ycontrol in circuit with each station end of the talking circuit and controlled by the receiver hooks of both stations; a selector operated in electrical association with the ringing circuit and associated with each control means and controlled thereby; a sound recording system having an electromagnetic recorder, a record, and a current supply, and controlled by said selector tooperate the sound recording system and connect the recorder directly into the talking circuit, said selector operating only at one station at which the receiver hook is depressed.

18. Automatic, sound recording means for telephone systems comprising in combination with two telephone stations linked by a talking circuit and including a ringing circuit, and, a receiver hook for each station; a recording system including a record and an electro-magnetic recorder; means actuated by electrical impulses in the ringing circuit and controlled by the receiver hooks of both stations automatically connecting the recorder directly electrically into the talking circuit, coincidently moving the recorder into cooperation with the record and causing operation of therecording system after a predetermined period of ringing when the receiver hook at one station remains depressed and the receiver hook at the other station is released.

19. Automatic sound recording means for telephone systems comprising in combination with two telephone stations linked by a talking circuit and including a ringing circuit, and, a receiver hook for each station; a. recording system including a record and an electro-magnetic recorder and means for driving said recording system; means actuated by electrical impulses in the ringing circuit and controlled by the receiver hooks of both stations automatically connecting the recorder directly electrically into the talking circuit, coincidently moving the recorder into cooperation with the record and actuating the driving means after a predetermined ringing period when the receiver hook of one station remains depressed and the receiver hook of the other station is released, andv means automatically disrupting operation of, and returning and resetting the recording system to normal inoperative position when the lrelation of the receiver hooksv is changed from that described.

20. Automatic sound recording means comprising, in combination with two telephone stations linked by a-talking circuit and including a signaling system and, a receiver hook for each station; a sound recording system including a record, driving means, and an electro-magnetic recorder, for each station; means actuated in series with the signaling system and controlled through the talking circuit by the receiver hooks of both stations electrically connecting said recorder directly into the talking circuit, and coincidently moving the recorder into cooperation with the record, and starting operation of the driving means i'or operating the recording system at one station'after a predetermined period of signaling when the receiver hook of said one station is depressed, and the receiver hook at the other station is released/,and means automatically disrupting operation of said recording system, disconnecting the recorder from the talking circuit, and moving the recorderout of cooperation with the record when the relation of the receiver hooks is changed from that described;

tion; a mechanical type record, a recorder operable to cut a recordvtrace thereon', for one station; means to effect recording movement of both the record and recorder, and automatic means controlling the vmeans to effect recording movement in such a way that movement or neither the record nor recorder takes place when the receiver hooks of both stations are: simultaneously both in either released or depressed position, said automatic means automatically connecting the recorder directly into the talking circuit and being actuated by signal impulses therein when the receiver hook of saidone station remains depressed and the receiver hook of the .other station is released and the one station is signalled.

22. A recording system comprising a talking circuit including two telephone stations having each a receiver hook; recording means including a mechanical type record and operating means and an electrically actuated recorder therefor,

for each station; selector means at each station operated through the agency of signal impulses in the talking circuit and controlled by the receiver hooks of both stations automatically connecting the recorder of one station directly into vthe talking circuit, and starting the operating means to continuously operate the record when the receiver hook of the other station is released while the receiver hook of the one station remains depressed, and disrupting operation of the recording means when either the receiver hook of said one station'is released, or, the receiver hook of the other station is depressed while the receiver hook of the one station remains depressed.

OTTO H. SCHULZ.

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