US3691300A - Tone controlled dictation apparatus - Google Patents

Tone controlled dictation apparatus Download PDF

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US3691300A
US3691300A US468304A US3691300DA US3691300A US 3691300 A US3691300 A US 3691300A US 468304 A US468304 A US 468304A US 3691300D A US3691300D A US 3691300DA US 3691300 A US3691300 A US 3691300A
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circuit
signal
signals
tone
signal responsive
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Matthew P Langendorf
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International Business Machines Corp
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International Business Machines Corp
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
    • H04M11/10—Telephonic communication systems specially adapted for combination with other electrical systems with dictation recording and playback systems

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  • ABSTRACT The invention relates to tone control arrangements for dictating apparatus using mechanical reed generators and transistor-reed relay circuits.
  • the apparatus has a central dictation unit with an associated control unit.
  • the generators are operated by the dictator to generate tone signals of predetermined frequency [56] References Cited which are then transmitted and recognized by the con- UNITED STATES PATENTS trol unit in order to control the action of the dictating 2,826,638 3/1958 Large et a1 ..340/171 x apparatus 2,949,502 8/1960 Logan ..179/6 13 Claims, 13 Drawing Figures mar 2 L 'IIELEPHONEI 1 CONTROL UNIT L- l'l'l J I moucnon 1 UNIT I VOICE L i v 34 1 ON LISTEN REEDS CRADLE I SUPPLY RELAY RELAYR 1 RELAY R5 VR1 swncn (vom SOLENOID R2 DICWING TELEPHONE SERIES 1 HANDSET 2?
  • tone control arrangements disclosed herein are of special interest in connection with dictating apparatus involving telephone communication networks, but may also be adapted for other telecommunication systems or locally controlled machine environments.
  • tones are generated by actuation of mechanical reed generators and recognized in the central dictation equipment by reed relays that are selectively responsive to the generated signals.
  • a dictator may have dictated the numerical sequence: l, 2, 3, 5, 5, 6, 7, etc.. Subsequently, the dictator backspaces to the beginning of the sequence for review purposes and discovers that he inadvertently dictated the number 5 twice. If a magnetic record media is used, it is possible for the dictator to erase the first 5 and to record the number *4 in its place. In order to do this he will ordinarily backspace or reverse the equipment to the beginning of the sequence, listen to the numbers l 2, 3, stop the equipment and change its mode from Listen to Record, re-dictate the number 4, and again change the mode of the equipment from Record to Listen. The revised sequence then becomes 1, 2, 3, 4, 5, 6, 7, etc., as it should be, and is error-free.
  • the dictating apparatus respond rapidly to the control changes, such as mode changes from Record to Listen, or vice versa, or else the newly dictated material, such as the number 4, may overlap previously dictated material that should have been retained, thereby resulting in the recording of improper sequences or the loss of material entirely.
  • an object of the invention is to provide tone controlled apparatus with rapid equipment response to generated signals.
  • Another object of the invention is to provide dictating apparatus with tone generating and response facilities that requires a minimum of operator attention.
  • An additional object of the invention is to provide tone controlled dictating apparatus that is characterized by extremely accurate initiation and termination of functions.
  • Still another object of the invention is to provide tone control arrangements that are useful in either a system or machine environment.
  • a further object of the invention is to provide dictating apparatus with tone generation and response capabilities established in a simplified manner in connection with readily available machine or system components.
  • an object of the invention is to provide toneoriented arrangements for performing all functions normally required in a dictating application.
  • Still another object of the invention is to establish rapid response of apparatus to controlling signals while maintaining uniformity and accuracy of response throughout the operations of the apparatus.
  • dictating apparatus is arranged in a telecommunication environment with an auxiliary tone generating member adapted for installation on existing telephone handsets for generation of signals through the lines and novel circuits are provided at centrally located dictation equipment for selective response to generated signals in a reliable and rapid manner for effecting functions of the equipment according to the requirements of the user.
  • tones are generated from integrally provided signal generating members over private lines to effect functions through comparable selectively operated circuits or from a locally disposed operator handset either by direct wire or under control of signals radiated from the handset.
  • FIG. 1 represents several equipment configurations in which the invention may be incorporated.
  • FIG. 2 is a block diagram of various components at the receiving end of one of the configurations shown in FIG. 1, such as a dictation system using telephone communication network facilities.
  • FIG. 3 illustrates a signal generating unit that is useful in a system such as that in FIG. 2.
  • FIGS. 4a and 4b represent cross-sectional views of the signal generating unit of FIG. 3.
  • FIGS. 5a and 5b represent alternative signal generating apparatus.
  • FIGS. 6a and 6b represent waveforms of typical control signals that result from actuation of the apparatus of FIGS. 3, 4a, 4b, 5a and 5b.
  • FIG. 7 illustrates certain components and circuit connections provided in a central dictation apparatus such as that shown in FIGS. 1 and 2.
  • FIG. 8 illustrates certain principles of operation of response circuits provided in a control unit in the system of FIG. 2.
  • FIGS. 9a and 9b together represent a detailed circuit diagram of certain telephone equipment and control circuits in the block diagram of FIG. 2.
  • the dictating apparatus discussed herein, in all forms, makes use of a central dictation unit 1, FIG. 1, that is not shown in every detail but that is generally comparable to the dictation recording equipment disclosed in U. S. Pat. application Ser. No. 216,261, entitled Multiple Station Selection System with N. J. Albanes and M. P. Langendorf as inventors, filed Aug. 10, 1962 now U.S. Pat. No. 3,222,460 and assigned to the same assignee as the present invention.
  • the central dictation apparatus 1 has an associated control unit 2 that includes the major portion of the circuit shown in FIGS. 9a and 9b. Control unit 2 passes audio signals to and from the dictation equipment 1 and in addition recognizes tone signals for establishing various modes of operation and effecting various functional operations in unit 1.
  • FIG. 1 a number of possible machine and system configurations are illustrated in FIG. 1.
  • signals may be generated over direct wire 3 from microphone handset 4 with machine 1 and control unit 2 being physically located in close proximity to the user of the equipment.
  • tones can be audibly generated from a handset 4 for recognition by control unit 2 as indicated by symbols 5. While not involving tone generation or recognition, direct operator control of dictating equipment of the general type described is presented in the IBM Customer Engineering Manual Dictation Equipment, Form No. 24l507l, Revised Oct. 5, 1962. This equipment is similar in all basic respects to that taught in the Albanes, et a1. application, previously noted.
  • Recording apparatus of this type includes a volume control 6, a tuning control 7 forestablishing accurate tracking of recorded signals on a record media, such as a magnetic belt, a belt release lever 8 for loading and unloading magnetic belts, and an index assembly 9 for perforating an index slip 10 with secretary (SEC) instruction perforations or end of letter (LTR) perforations as dictation progresses.
  • SEC secretary
  • LTR end of letter
  • a remote microphone system such as that described in the IBM Customer Engineering Instruction Manual, Form No. 24l-5l70-dated Nov. 3, 1962.
  • stations 11 and 12 are interconnected with recording apparatus 1 by means of a direct wire communication facility 13.
  • the remote stations 11 and 12 have associated microphone handsets 14 and 15 that serve to control apparatus 1 by appropriate manipulation of buttons such as SEC-LTR button 16, Record- Listen-Review (REC-LIS-REV) button 17, and dictate bar 18 on microphone handset 14.
  • Remote stations such as stations 11 and 12, can be modified to generate tones of predetermined frequencies under control of buttons such as buttons 16, 17, and 18 or by the addition of separate tone generating buttons 19 and 20.
  • the generated tones can be recognized for selecting a particular central recorder, as well as controlling function of the recorder selected, as taught by the present invention.
  • Another system configuration involves telephone transmission facilities including transmission lines 21 and telephone units 22, 23, and 24. These units have associated transmitter-receiver handsets 25, 26, and 27.
  • dictating systems involving telephone transmission facilities have been developed in the past.
  • One such system is described in the IBM Customer Engineering Instruction Manual, Form No. 241-5099, dated June 5, 1962.
  • the system described in this manual makes use of PBX switching equipment.
  • PBX dictating system a number of remote stations are selectively connected by dial networks to a number of central recording units. In order to establish a connection an individual telephone unit is dialed in the conventional manner.
  • all of the functions of the dictating equipment are initiated by dialing particular predetermined digits on the telephone unit. In a typical case, the digits dialed are: digit 1 for dictate, digit 2 for secretary instruction perforation, digit 3 for playback, and digit 4 for end of letter perforations.
  • One of the purposes of the preset invention is to eliminate the necessity for dialing a particular digit in order to effect a related function of the dictating equipment 1, FIG. 1.
  • telephone units 22 and 23 communicate with dictating equipment 1 and control unit 2 through telephone unit 24.
  • Handset 27 is placed on an induction unit 28 for inductive pick-up of incoming and outgoing signals.
  • Induction unit 28 has an arm 29 that extends over the cradle to operate a switch actuating member, such as member 30 on telephone unit 24.
  • Connection of one of the units 22 or 23 to the dietating equipment 1 is performed in a manner similar to that in the PBX system with the operator at the remote station dialing a predetermined number.
  • the ringing of unit 24 in response to the dialling of the preselected number is recognized by induction unit 28 and control unit 2, whereupon arm 29 is raised to connect unit 24 to the calling station.
  • Handsets 25 and 26 are provided with reed signal generating units 31 and 32 that are shown in more detail in FIGS. 3, 4a, and 4b. Following the successful connection of a particular station to the central recording equipment 1, the generators 31 or 32, as the case may be, are operated by the dictator to generate tone signals of predetermined frequency which are then transmitted and recognized by control unit 2 in order to control the action of dictating apparatus 1.
  • telephone units 22 or 23 may be connected to the control unit 2 by a direct telephone unit 33.
  • FIG. 2 is a block diagram and FIGS. 9a and 9b are detailed diagrams of the central station apparatus ineluding induction unit 28, control unit 2, and dictating unit 1.
  • FIG. 9a should be arranged to the left alongside FIG. 9b to form a composite diagram.
  • Direct telephone unit 33 is also shown as an alternative input to control unit 2.
  • Induction unit 28 includes a reproducer 34, cradle switch solenoid 35 for operating arm 29 in FIG. 1, an induction coil 36 and a telephone cradle 28a for accommodating telephone handset 27. Certain of these elements are shown in detail in FIG. 9a.
  • Control unit 2 includes a power supply 37, a preamplifier 38, and amplifier 39, a tone generator 40 and a number of relays involved in operation of the control unit.
  • the relays are as follows:
  • Control unit 2 also has a number of reed relay sections as follows:
  • No Connection Control unit 2 serves to transfer speech signals durin g dictation from a remote handset, such as handset to dictating unit 1 and during a listen mode from dictating unit 1 to handset 25, and also responds to tones generated by the generator unit at the remote station, such as unit 31, to effect various functions in dictating unit 1.
  • the various speech and control signals are transmitted between control unit 2 and dictating unit 1 through the M terminals Ml-Mll.
  • generating unit 31 has a number of control buttons that are effective to generate predetermined tones for controlling dictating unit 1. These include: Record button 44, Review/Listen button 45, Secretary (SEC) button 46, and Letter (LTR) button 47.
  • a separate stop button 48 may be provided on unit 31 for stopping any action previously initiated under control of buttons 4447.
  • Unit 31 is retained on handset 25 by an elastic strap 49 having a clip 50 adapted for attachment to a stud 51 on unit 31. In operation, unit 31 is strapped to handset 25 at the transmitter end of the handset.
  • unit 31 has a number of resonant reeds, such as reeds 52 and 53 for generating tone signals required during operation.
  • Generating unit 31 has a resonator plate 54 for transmitting generated signals to handset 25 for transmission.
  • Keybutton 44 has extensions 44a and 44b. Extension 44a is positioned over a strap 55 that has a permanent magnet 56 attached thereto. Extension 44b is arranged adjacent the end of reed 53. The unoperated position of button 44 is shown in FIG. 4a.
  • button 44 is depressed as shown in FIG. 4b.
  • extension 44b trips past the end of reed 53, initiating vibration in the reed and thereby generating the Record tone.
  • extension 440 moves against strap 55 and thereby moves magnet 56 into contact with reed 52.
  • a flat spring 57 exerts pressure to restore button 44 upwardly to its normal position.
  • the extensions 44a and 44b also move upwardly. This permits strap 55 and magnet 56 to restore.
  • Magnet 56 exerts movement on reed 52 during the upward movement for an interval of time until the magnetic force exerted by magnet 56 can no longer hold reed 52 due to the tension exerted by strap 55.
  • reed 52 vibrates and generates another distinctive tone signal that is recognized by control unit 2 to stop the record function and to place control unit 2 in condition for recognizing subsequently generated signals. Only a single reed is shown for generating the stop signal in FIG. 4a and 4b, but in the preferred embodiment disclosed herein, two reeds are provided for the stop function for increased reliability.
  • FIGS. 5a and 5b An alternative generating unit for initiating reed signals electromagnetically is shown in FIGS. 5a and 5b.
  • the generating unit includes a number of tuned reeds 60-65 with associated contacts 66-71, as shown in the top elevation of the unit in FIG. 5a.
  • An electromagnet 72 develops signals that are transmitted to a sounding board 73 for pickup by a transducer 74. Relating the generator of FIGS. 5a and 5b to that shown in FIGS. 4a and 4b, the sounding board 73 corresponds to the resonator plate 54.
  • FIG. 6a represents the waveform of a typical signal resulting from vibration of a reed in one of the tone generators 31 or 32.
  • the resonant coupler 54 FIG. 4a, transfers reed vibrations to the telephone handset 25 thereby causing the telephone transmitter diaphragm to vibrate at the same frequency as the reed.
  • Electrical signals of l milliwatt (mw) or greater at 600 ohms with a frequency equal to the reed vibrations are induced on the telephone line.
  • the electrical signal induced has the characteristics of a ring, that is a large amplitude during the interval A to B, FIG. 6a, with a subsequent gradual decrease to zero level after approximately 300 milliseconds (ms).
  • Interval A to B represents about 50 milliseconds
  • interval B to C represents about 100 milliseconds
  • interval C to D represents about 100 milliseconds.
  • the circuits in control unit 2, FIGS. 9a and 9b are arranged to respond to the generated signal of FIG. 6a during the entire interval A to D but are effective to initiate or terminate a function only in response to a developed signal having a fairly constant amplitude as indicated in the interval B to C, FIG. 6b.
  • each of the vibrating reed relays VRl-VRS has an associated circuit including a transistor for insuring a rapid response to any signal of sufficient duration having the required frequency characteristics.
  • the principles of operation of the tone responsive circuits are illustrated in FIG. 8.
  • the circuit of FIG. 8 includes a resonant reed contact bank 80 with individual reeds 81-85 that vibrate at particular predetermined resonant frequencies.
  • the circuit includes two transistors designated Q1 and Q2.
  • Transistor Q1 is biased into class B operation by voltage divider resistors 86 and 87 so that only a small direct current flows through coil Ll.
  • Transistor Q2 is forward biased in a similar manner by resistors 88 and 89.
  • a tone signal having a frequency equal to the resonance of one of the reeds 81-85 relative to coil L1
  • resistors 88 and 89 When a tone signal having a frequency equal to the resonance of one of the reeds 81-85 relative to coil L1, appears at input 90, it is amplified by transistor Q1.
  • An alternating signal current flows through coil L1 inducing a flux in the magnetic circuit of L1 and the reed corresponding to that frequency oscillates.
  • additional base current flows through transistor Q1, switching Q1 into saturation.
  • Circuit branches are provided from the individual reeds 81-85 for controlling functions that maybe desired when the associated reeds are selected. These circuit branches are designated 91-95.
  • the circuit including transistor Q1 is a latching type circuit since it responds to a tone at input 90 and since it switches a particular circuit 91-95 and holds the same active even after the signal at input 90 terminates.
  • transistor Q1 latches, no signals subsequently received at terminal 90 will affect the circuit.
  • a tone signal having a frequency that corresponds to the resonant frequency of reed 96 appearing at input 90 is amplified by transistor Q2.
  • the alternating signal current flowing through coil L2 induces flux in the magnetic circuit involving coil L2, thereby causing reed 96 to oscillate.
  • Transistor Q1 collector receives its potential from terminal 97 and as soon as resonant reed 96 opens, the collector circuit to coil L1 and transistor Q1 is interrupted. The reed 81-85 that was previously selected releases and the circuit with transistor Q1 returns to its neutral state.
  • the circuit of FIG. 8 provides five control functions by lines 91-95 in response to five distinct tone frequencies. A greater or lesser number of functions can be provided for by having a corresponding number of reeds and related control frequencies.
  • a sixth tone frequency controls reed 96 and is used as a stop frequency to restore the circuit to a neutral condition.
  • Induction telephone unit 28 is connected to control unit 2 comprising the majority of the circuits of FIGS. 9a and 9b by mating connectors 101 and 102.
  • control unit 2 comprising the majority of the circuits of FIGS. 9a and 9b by mating connectors 101 and 102.
  • a direct unit 33 can be connected to control unit 2 by insertion of connector 103 with connector 102 instead of connector 101.
  • FIGS. 9a and 9b include various relays designated Rl-R6 and a number of other circuits including transistors Tl-Tl 1.
  • power supply 37 provides operating voltages from a source (not shown) through plug 104 and switch 105, which is closed at this time.
  • the resulting ringing current develops a signal in portion 36a of induction coil 36 which is applied to the base of transistor T4.
  • the ringing current is amplified by transistor T4 and is supplied to transistor T5.
  • the output of transistor T5 passes through transformer 106.
  • the positive portions of the ringing signal are applied through diode 107 and applied by a feedback loop to the base of transistor T4 for the development of automatic gain control (AGC).
  • AGC automatic gain control
  • a portion of the incoming ringing signal is divided by resistors 108 and 109 and provided by line 110 to the base of transistor T3.
  • the output of transistor T3 passes through transformer 111 to the base of transistor T2 resulting in the energization of the voice operated relay (VOR) R2.
  • VOR voice operated relay
  • the R2-2 contacts provide a path for energizing Sequence relay R6. This results in the closure of contacts R6-1 and R6-2.
  • Contacts R6-l are in a path designated x-x in series with the R2-1 contacts and a capacitor designated 112. Closure of contacts R6-1 in connection with the previously closed contacts R2-1 supplies a momentary DC potential of approximately 50 milliseconds duration to the base of transistor T1 and capacitor 112. Transistor T1 then switches on, energizing the Power On relay R1. Contacts Rl-l and R1-2 associated with rely R1 then close.
  • the R1-1 contacts complete a power path to dictating unit 1 by way of receptacle 114 into which plug 115, FIG. 7, is connected.
  • Relay contacts Rl-2 supply energizing potential to telephone solenoid 35 by line 116 and terminal connectors 7 in connector blocks 101 and 102. Solenoid 35 operates arm 29 thereby closing the cradle switch in unit 24, FIG. 1, and completing the audio signal transmission path from telephone unit 22 to the central recording apparatus.
  • the closure of contacts R1-2 also provides energizing potential to a side tone circuit including transistor T6 by line 117, relay contacts R4-2, and line 118.
  • the side tone is supplied through transformer 119, and terminals 8 of connector blocks 101 and 102 to transducer 34 for transmission to the calling party. This indicates to the calling party that the dictation machine is now in a seized condition.
  • the side tone also'indicates that the dictation machine is in a Stop mode.
  • the VOR relay R2 under control of transistor T2 continues to vibrate in response to any received voice signals or audio control signals, maintaining contacts R2-l and R2-2 closed.
  • the circuit associated with transistor T1, including capacitor 112 and resistor 120 has a time constant of approximately 25 to 30 seconds.
  • transistor T2 and VOR relay R2 drop due to the cessation of voice or audio control signals, transistor T1 and Power On relay R1 are maintained on an additional 25 to 30 seconds.
  • capacitor 112 discharges sufficiently, transistor T1 ceases conduction, relay R1 drops, and the equipment is restored to a standby condition.
  • buttons 44-47, FIG. 3, the first button depressed by the dictator is Record button 44. Depression of button 44 generates a 365 cps signal that is received by coil 36 and applied to the base of transistor T4. The signal is amplified by transistor T4 and further amplified by transistor T5. The signal is applied through transistor T3 by line 110 to keep the VOR circuit active.
  • Sequence relay R6 Associated with contacts R2-2 is a capacitor 121 that is normally charged through the R2-2 point. The appearance of the 365 cps signal transfers the R2-2 points and provides a discharge path by line 122 for capacitor 121 to energize Sequence relay R6. Sequence relay R6 is energized momentarily for a period of 90 to 100 milliseconds, closing contacts R6-1 and R6-2.
  • the 365 cps signal is transferred through a volume control 123, contacts R6-2, now closed, contacts R4-3, closed, and by line 124 to four capacitors designated 125, 126, 127, and 128.
  • Capacitors 125-128 serve as inputs to transistors T8-Tl1 and associated reed relays VR2-VR5 that control the Record, Listen, Secretary punch, and Letter punch, respectively.
  • Relay VR2 has a mechanical reed that responds to the 365 cps signal thereby vibrating contacts 129. This applies a charging potential from terminal 1 of block 43 to capacitor 133 thereby switching transistor T8 on. Transistor T8 saturates, pulling relay VR2 contact 129 fully closed and the circuit latches. The circuit remains latched until released by the receipt of Stop tone signals of 405 cps and 455 cps generated by release of record button 44 as discussed in connection with FIG. 4a, or by depression of a separate stop button 48 that may be supplied on generating unit 31, FIG. 3.
  • the other control circuits including transistors T9, T10, and T11 and associated reed relays VR3, VR4, and VR respond to signals of 490 cps, 455 cps, and 405 cps, respectively. These circuits have reed contacts 130, 131, and 132 and associated capacitors 134, 135, and 136 for initiating operation of the circuits.
  • the VR2 and VR3 circuits once activated, remain latched until potential is removed by energization of transistor T7 and reed relay VRl in response to the recognition of stop tones of 405 cps and 455 cps simultaneously.
  • the operation of the VR4 and VRS circuits is only momentary.
  • the automatic gain control serves this purpose, but since the AGC depends upon the received signal for its source of DC potential, the AGC action is not instantaneous.
  • the waveform of F 16. 6a the first portion of a received signal during the interval A to B has a larger amplitude than that portion of the signal from B to C.
  • The, time duration of the developed signal of FIG. 6b during interval A to B depends upon the reaction of the AGC network.
  • the circuit reaction to any applied tone control signal is delayed until the interval of B to C, FIG. 6b, during which the developed signal has a substantially uniform amplitude. This is accomplished by delaying the application of the signal for an interval of time until the AGC becomes efi'ective.
  • the average time for the AGC circuit to become effective is approximately 25 milliseconds.
  • the signal delay is accomplished by selecting an RC time constant for resistor 137 and capacitor 138, such as 40 milliseconds, that delays the response of transistor T2 to the incoming signal for a sufficiently long time period.
  • the latching of the Record circuit including transistor T8 and reed relay VR2 supplies energizing potential through diode D7 to energize Delay relay R4.
  • the closure of contacts R4-1 establishes a path for subsequent energization of Series relay R3 when a Stop signal is received.
  • Contacts R4-2 open, removing potential from transistor T6 thereby terminating the generation of the side tone during the Record mode.
  • Contacts R4-3 transfer, thereby opening the input circuit, including line 124, to capacitors 125-128 and transferring the input circuit to the base of transistor T7, instead.
  • a path is also established through terminal M3 of terminal block 43 to energize the Record relay, FIG. 7 and through terminal M4 to energize the clutch magnet, FIG. 7. This establishes a Record mode in dictating equipment 1 and initiates driving of the magnetic belt in order to record speech signals applied by terminals M9 and M11 to amplifier 42, FIG. 7.
  • Stop signal comprising the tones 405 cps and 455 cps.
  • the combined tones are supplied through contacts R6-2, R4-3, now transferred, to the input of transistor T7 and relay VRl which responds by vibrating the reed contacts and 141.
  • Contacts 140 and 141 are wired in series thereby insuring that both of the tones 405 cps and 45S cps must be present before the stop circuit responds.
  • the Listen tone signal of 490 cps is received after the equipment is placed in a Stop mode, as a result of depressing Review-Listen button 45, such signal results in the saturation of transistor T9 and the energization of relay VR3.
  • Potential is applied by terminal M8 of block 43 to energize the Backspace magnet, FIG. 7 which backspaces the head and record media in dictating equipment 1 for review of previously dictated material. Successive backspace operations can be performed by depressing button 45 as many times as desired. No circuit exists for energizing the Record relay, FIG. 7, so dictating equipment 1 is automatically in a Listen mode.
  • the clutch magnet, FIG. 7, is energized by potential through terminal M4 of terminal block 43.
  • Delay relay R4 is energized through diodes D9 and D10 and a path also exists for energizing the Record/Listen relay R5.
  • Relay R actuates contacts 145 and establishes the proper circuit connections for transmitting signals reproduced from the record media in the dictating equipment to the transducer 34 for subsequent transmission over the telephone communication facilities to the person using the equipment.
  • reed relays VR2 and VR3 The operation of reed relays VR2 and VR3 is attended by a concurrent operation of Delay relay R4 in order to set the circuits up for recognition of a subsequently received stop tone.
  • the tone signals of 405 cps and 455 cps are recognized respectively by transistor T and relay VR4 in combination, and transistor T11 and relay VRS in combination. Since only a momentary energization of the Letter solenoid or Secretary solenoid from terminals M10 and M2, FIG. 7, is required, it is not necessary that relay R4 be energized and the Secretary and Letter circuits, FIG. 9b, respond only momentarily to accomplish these functions.
  • the operation of the tuned reed circuits disclosed herein is performed in a rapid, efficient manner.
  • the circuit latching action previously described including the charging of capacitor 133 requires only 12 to 15 milliseconds, which in the case of the 365 cps signal involves only the first, second and part of the third alternating cycle of the generated signal for a fully latched condition.
  • the switching time involved has usually been in the order of I00 to 150 milliseconds which is approximately ten times slower than the reaction time of the circuits disclosed herein.
  • the direct telephone unit 33, FIG. 9a can be substituted for the induction type telephone unit 28 for cooperation with telephone transmission facilities if a direct hook-up is desired.
  • the novel circuit arrangements operate in either case in a comparable fashion and with comparable speed and accuracy.
  • a first circuit including a first signal responsive means responsive to a first distinct command signal and being coupled to initiate a stop mode;
  • a second circuit including a second signal responsive means responsive to a second distinct command signal and being coupled to initiate and latch a dictate mode into operation
  • inhibit means coupled from said second signal responsive means to said first circuit and said second circuit for enabling the first circuit to and inhibiting the second circuit from conducting signals to the signal responsive portion thereof when said second signal responsive means is operating and for inhibiting the first circuit from and enabling the second circuit to conduct signals to the signal responsive portions thereof when said second signal responsive means is not operating.
  • a device of the type for controlling a dictating machine having a first mode and a second mode, by means of command signals transmitted over a transmission link and means for coupling the transmission link to and decoupling the transmission link from the dictation equipment upon callup and hangup of the telephone line, wherein the improvement comprises:
  • a first circuit including a first signal responsive means responsive to a first distinct command signal and being coupled to initiate said first mode;
  • a second circuit including a second signal responsive means responsive to a second distinct command signal and being coupled to initiate said second mode into operation
  • a device of the type for controlling a dictating machine having the modes of stop and at least another mode, by means of command signals transmitted over a transmission link and means for coupling the transmission link to and decoupling the transmission link from the dictation equipment upon callup and hangup of the telephone line, wherein the improvement comprises:
  • first circuit including a first signal responsive means responsive to a first distinct command signal and being coupled to initiate a stop mode and a second circuit including a second signal responsive means responsive to a second distinct command signal and being coupled to initiate and latch said another mode into operation
  • a device of the type for controlling a dictating machine having a first mode and a second mode, by means of command signals transmitted over a transmission link and means for coupling the transmission link to and decoupling the transmission link from the dictation equipment upon callup and hangup of the telephone line, wherein the improvement comprises:
  • a first circuit including a first signal responsive means responsive to a first distinct command signal and being coupled to initiate said first mode;
  • a second circuit including a second signal responsive means responsive to a second distinct command signal and being coupled to initiate said second mode into operation;
  • a device of the type for controlling a dictating machine having the modes of stop and at least another mode, by means of command signals transmitted over a transmission link and means for coupling the transmission link to and decoupling the transmission link from the dictation equipment upon callup and hangup of the telephone line, wherein the improvement comprises:
  • a first circuit including a first signal responsive means responsive to a first distinct command signal and being coupled to initiate a stop mode;
  • a second circuit including a second signal responsive means responsive to a second distinct command signal and being coupled to initiate and latch said another mode into operation
  • a device of the type for controlling a dictating machine having the modes of stop and dictate, by means of command signals transmitted over a transmission link and means for coupling the transmission link to and decoupling the transmission link from the dictation equipment upon callup and hangup of the telephone line, wherein the improvement comprises:
  • a first circuit including a first signal responsive means responsive to a first distinct command signal and being coupled to initiate a stop mode;
  • a second circuit including a second signal responsive means responsive to a second distinct command signal and being coupled to initiate and latch a dietate mode into operation
  • a tone control arrangement comprising:
  • said apparatus having circuits for establishing a number of different operations in said apparatus;
  • a tone generating unit for generating signals of predetermined frequencies
  • control unit interconnected with said controlled apparatus, said control unit having circuitry for amplifying any received signal including an automatic gain control circuit;
  • said recognition circuits including a transistor and an associated tuned reed relay selectively responsive to said generated signals to provide control signals;
  • delay means in said control unit effective to delay transmittal of any received signal to said recognition circuits until the automatic gain control circuits have become effective to develop a signal of substantially constant amplitude from a said received signal;
  • a tone control arrangement for dictating apparatus, comprising:
  • dictation unit individual tone recognition circuits at said dictation unit, each of said tone recognition circuits having a transistor connected for energization in series with a tuned reed relay selectively responsive to said generated signals;
  • a stop tone circuit responsive to receipt of a predetermined stop tone signal for removing holding potential from any previously latched tone recognition circuit
  • a tone control arrangement for dictating apparatus comprising:
  • dictation unit having facilities for recording and reproducing signals on a record media and control circuits for establishing a number of modes of operation and initiating a number of functions in said dictation unit, including Record and Listen modes and Letter and Secretary indexing operations;
  • a tone generating unit said generating unit generating signals of predetermined frequencies in response to depression of related buttons;
  • each of said mode recognition circuits having -a transistor connected for energization in series with a tuned reed relay selectively responsive to one of said generated signals and holding circuit connections to latch any energized transistor into saturation;
  • each of said function recognition circuits having a transistor connected for energization in series with a tuned reed relay selectively responsive to said generated signals but connected only for momentary energization to initiate the function involved;
  • a stop tone recognition circuit responsive to receipt of a predetermined stop tone signal for removing holding potential from any previously latched mode recognition circuit
  • a transfer delay circuit responsive to energization of one of said mode recognition circuits to transfer connection of said signal path to the input of said stop tone recognition circuit
  • dictation unit having facilities for recording and reproducing signals on a record media and individual circuits for establishing a number of modes of operation and initiating a number of functions in said dictation unit including Record and Listen modes and Letter and Secretary indexing operations;
  • a tone generating unit at said remote station, said generating unit generating signals of predetermined frequencies in response to depression of related buttons;
  • control unit interconnected with said dictation unit
  • each of said mode recognition circuits having a transistor connected for energization in series with a tuned reed relay selectively responsive to one of said generated signals and holding circuit connections to latch any energized transistor into saturation;
  • each of said function recognition circuits having a transistor connected for energization in series with a tuned reed relay selectively responsive to said generated signals but connected only for momentary energization to initiate the function involved;
  • a stop tone recognition circuit in said control unit responsive to receipt of a predetermined stop tone signal for removing holding potential from any previously latched mode recognition circuit
  • a transfer delay circuit in said control unit responsive to energization of one of said mode recognition circuits to transfer transmitted signals to the input of said stop tone recognition circuit
  • said generating unit has a plurality of reeds selectively actuated by depressing associated buttons to generate the tones required;
  • a tone control arrangement comprising:
  • tone responsive apparatus said apparatus having control circuits for establishing a number of different operations in said apparatus;
  • a tone generating unit for generating signals of predetermined frequencies
  • said recognition circuits having a transistor connected for energization in series with tuned reed relays selectively responsive to one of said generated signals and holding circuit connections to latch any energized relay;
  • a stop tone circuit responsive to receipt of a predetermined stop tone signal for removing holding potential from any previously latched recognition circuit
  • a transfer circuit responsive to energization of one of said recognition circuits to transfer generated signals to the input of said stop tone circuit
  • a single transistor serves to energize any reed relay that becomes energized
  • stop tone circuit also includes a transistor and tuned reed relay responsive to two generated stop tones to remove holding potential from a latched recognition circuit.

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Telephone Set Structure (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
  • Dovetailed Work, And Nailing Machines And Stapling Machines For Wood (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Telephone Function (AREA)
  • Telephonic Communication Services (AREA)
US468304A 1965-06-30 1965-06-30 Tone controlled dictation apparatus Expired - Lifetime US3691300A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US46830465A 1965-06-30 1965-06-30

Publications (1)

Publication Number Publication Date
US3691300A true US3691300A (en) 1972-09-12

Family

ID=23859269

Family Applications (1)

Application Number Title Priority Date Filing Date
US468304A Expired - Lifetime US3691300A (en) 1965-06-30 1965-06-30 Tone controlled dictation apparatus

Country Status (10)

Country Link
US (1) US3691300A (xx)
JP (1) JPS4312694B1 (xx)
BE (1) BE682448A (xx)
CH (1) CH456184A (xx)
DE (1) DE1292214B (xx)
ES (1) ES328461A1 (xx)
FR (1) FR1485066A (xx)
GB (1) GB1087127A (xx)
NL (1) NL6608620A (xx)
SE (1) SE325060B (xx)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4517410A (en) * 1982-04-02 1985-05-14 Data Acquisition Services Automatic user selected variable telephone message record and playback system
US4677658A (en) * 1983-03-09 1987-06-30 Kolodny Gerald M Remote dictating apparatus

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4658097A (en) * 1983-05-18 1987-04-14 Dictaphone Corporation Remote terminal for use with central dictation apparatus

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE936879C (de) * 1952-07-15 1955-12-22 Heinrich Dipl-Ing Gerwig Selbstwaehlsystem
DE1065018B (de) * 1955-02-25 1959-09-10 Standard Elektrik Lorenz Ag Schaltungsanordnung zur Steuerung fuer an Fernsprechanlagen, insbesondere Fernsprechnebenstellenanlagen, angeschlossene Diktiergeraete
BE565637A (xx) * 1957-03-14

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4517410A (en) * 1982-04-02 1985-05-14 Data Acquisition Services Automatic user selected variable telephone message record and playback system
US4677658A (en) * 1983-03-09 1987-06-30 Kolodny Gerald M Remote dictating apparatus

Also Published As

Publication number Publication date
JPS4312694B1 (xx) 1968-05-29
BE682448A (xx) 1966-11-14
FR1485066A (fr) 1967-06-16
GB1087127A (en) 1967-10-11
NL6608620A (xx) 1967-01-02
SE325060B (xx) 1970-06-22
CH456184A (de) 1968-05-15
DE1292214B (de) 1969-04-10
ES328461A1 (es) 1967-04-01

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