US3844512A - Arrangement for recording pulses - Google Patents

Arrangement for recording pulses Download PDF

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Publication number
US3844512A
US3844512A US00368669A US36866973A US3844512A US 3844512 A US3844512 A US 3844512A US 00368669 A US00368669 A US 00368669A US 36866973 A US36866973 A US 36866973A US 3844512 A US3844512 A US 3844512A
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US
United States
Prior art keywords
capacitor
pulse
pulses
circuit
motor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US00368669A
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English (en)
Inventor
P Fahlenberg
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Compur Werk GmbH and Co
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Compur Werk GmbH and Co
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Filing date
Publication date
Application filed by Compur Werk GmbH and Co filed Critical Compur Werk GmbH and Co
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Publication of US3844512A publication Critical patent/US3844512A/en
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Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
    • G11B15/02—Control of operating function, e.g. switching from recording to reproducing
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
    • G11B19/20—Driving; Starting; Stopping; Control thereof
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/012—Recording on, or reproducing or erasing from, magnetic disks
    • G11B5/016—Recording on, or reproducing or erasing from, magnetic disks using magnetic foils
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/26—Devices for calling a subscriber
    • H04M1/27—Devices whereby a plurality of signals may be stored simultaneously
    • H04M1/274—Devices whereby a plurality of signals may be stored simultaneously with provision for storing more than one subscriber number at a time, e.g. using toothed disc
    • H04M1/276—Devices whereby a plurality of signals may be stored simultaneously with provision for storing more than one subscriber number at a time, e.g. using toothed disc using magnetic recording, e.g. on tape

Definitions

  • a switching circuit is provided to control the energization of the electric motor and is controlled by a control circuit coupled both to the switching circuit and the pulse generator so that at the beginning of the first pulse, the switching circuit effects an energization of the motor and deenergizes the motor only after the expiration of a predetermined constant interval of time following the last to occur pulse in the pulse sequence.
  • This invention relates to an arrangement for recording electrical pulses or pulse sequences on a storage means, preferably a magnetic tape or a magnetic foil, driven by an electrical motor, the pulses being produced from a pulse generator by an actuating device which passes through different datum positions and being transmitted to the storage means by means of a recording member.
  • This object is achieved in the present invention by the fact that associated with the circuit of the electric motor is a switch circuit which is operated by a control circuit coupled to the pulse generator in such a way that at the beginning of the first pulse of a pulse sequence, it closes the circuit of the motor and only re-opens it again after the termination of a predetermined constant interval of time after the termination of the last pulse of the said pulse sequence.
  • the storage means is driven only during the recording of the pulse sequence and during the ensuing constant interval, in constrast to the time that it remains stationary when the actuating device is being moved to a new datum position.
  • the switch circuit comprises a transistor in the circuit of the electric motor, and this transistor is brought alternately into conductive and into nonconductive condition by the control circuit which is in the form of a mono-flop arrangement having an input characteristic similar to a conventional monostable multivibrator circuit and having an adjustable time delay pe riod.
  • a preferred embodiment of use of the arrangement for this invention is in the recording of a specific number or specific combination of numbers, for example telephone numbers, in an automatic telephone number selecting appliance.
  • the arrangement is so devised that the actuating device is in the form of a digit dial of a telephoneset and, thedial moves when back from the dialed (datum) position into the rest position, causes the pulse generator to produce a series of pulses at regular intervals and of a number corresponding to the selected digit.
  • FIG. 1 is a schematic illustration of an arrangement, particularly a block wiring diagram of the associated electrical connections;
  • FIGS. 2A0, 2B0, 2C0 and ZDo are diagrams relative to the pulse circuit and recording circuit, and;
  • FIG. 3 is a diagram of the control circuit associated with the pulse circuit.
  • a pulse generator is of a known form having associated therewith an actuating device 12 in the nature of a telephone number selector dial.
  • the selector dial 12 moving back from the abutment or dialed (datum) position towards its normal at rest position operates the pulse generator 10 to generate a pulse sequence composed of a plurality of d.c. voltage pulses.
  • the pulse sequence is composed of three pulses at equally spaced intervals, for example, of a 100 ms duration.
  • Choice of the number combination 342 produces the pulse sequence shown in FIG. 2 on the base A0.
  • the d.c. voltage pulses are converted into alternating voltage pulses by a transformer 16 connected to pulse generator 10 and these are recorded on a magnetic foil 20 mounted on a rotary plate 22 by means of a recording head 18.
  • the plate 22 is rotatably driven by an electric motor M through a drive train 24, which has only been diagrammatically depicted, connecting the drive shaft of the motor M with the rotary shaft 22a of the plate 22.
  • the motor M is energized by a battery B through a switch circuit Sw.
  • a control circuit St is coupled to the pulse generator 10 and with'circuit Sw in such a way that when a first pulse is received from the pulse generator 10, the control circuit St closes the control circuit Sw andholds it closed until a predetermined constant period of time has elapsed following the last pulse of the pulse sequence. Only then is the switch circuit Sw opened again.
  • the magnetic foil 20 is driven by motor M only so long as a pulse sequence is being recorded and thereafter a selected time delay period is imposed.
  • F IG; 3 illustrates the components of a control circuit St of this character which functions as a monoflop arrangement which can be triggered several times during its operation and having a characteristic similar to a monostable multivibrator.
  • This circuit St is coupled to the pulse emitter 10 through terminals K1 and K2.
  • the time delay RC circuit of the connection is defined by the adjustable resistance 26 and condensor 28 which can be short circuited and discharged through a transistor 30 which functions as a switch.
  • a pair of transistors 32 and 34 define a trigger circuit having regenerative bistable characteristic as does a Schmitt trigger, while another transistor 36 defines the switch Sw for the circuit controlling the motor M.
  • a pair of series connected resistors 38 are connected between the terminals K1 and K2 to define a voltage divider.
  • the base electrode of thetransistor 30 is connected to a junction between the resistors 38 and 40.
  • the emitter electrode of the transistor 30 is connected to the terminal K2 through a line 39.
  • the collector electrode of transistor 30 is connected through a resistor 42 to a junction point 41.
  • the condensor 28 is connected between the junction point 41 and the line 39.
  • a variable resistor 26 is connected through line 43 to the' positive terminal of a battery B.
  • the negative terminal of the battery B is connected to the line 39.
  • the trigger circuit 33 including the transistors 32 and 34 is arranged so that the base electrode of the transistor 32 is connected to the junction point 41.
  • the collector electrode of the transistor 32 is connected to the line 43 through a resistor 44 and to the base electrode of the transistor 34.
  • the collector electrode of the transistor 34 is connected through a resistor 46 to the line 43.
  • the emitter electrodes of both transistors '32 and 34 are connected through a resistor 48 to the line 39 and through a resistor 50 to the base electrode of the transistor 36.
  • the emitter electrode of the transistor 36 is connected to the line 39.
  • the motor M is connected in circuit between the line 43 and the collector electrode of the transistor 36.
  • the transistor 30 When the switching system is at rest, the transistor 30 is nonconducting and, therefore, the transistor 36 is alsononconducting and the motor M is deenergized.
  • the first pulse l (see diagram 'A0 in FIG. 2), produced by'choosing the number 3, arrivesat the base electrode of the transistor 30, the latter becomes temporarily conductive so enabling the condensor 28 to discharge therethrough (diagram B).
  • the transistor 36 is rendered conductive by the trigger circuit 33 so that the circuit of the motor M becomes energized and starts to rotate the plate 22 (diagram Co).
  • the pulses I and I subsequently received, prevent the recharging of condensor 28 and the motor continues to operate to rotate the plate 22.
  • a fast rotation motor is used as the drive motor M, so that the reception of the first pulse can follow almost instantaneously the commencement of movement of the storage means 20.
  • the invention is not to be limited to a use in the embodiment illustrated dealing with recording on a magnetic foil.
  • the principle of the invention namely the exclusion of idle times during pulse recording, can be used in a similar way in connection with other forms of storage means, for example, in relation to photo-electric recording.
  • a signal recording arrangement for recording signals from an actuating device which passes through different datum positions comprising:
  • pulse generator means responsive to said actuating device for producing electrical pulses or pulse se- 1 quences, said pulses being transmitted to said storage means'by means of. a recording member; means defining a capacitor charging circuit including a'chargeable capacitor and energy source means for energizing said capacitor charging circuit and charging said chargeable capacitor to a fully charged condition prior to the generation of said electrical pulses or pulse sequences; means defining a discharge circuit for discharging said capacitor, said discharge circuit means being responsive to said electrical pulses or pulse sequences-from said pulse generator means to effect a discharge of said capacitor immediately upon receipt;
  • regenerative bistable circuit means normally in one of two conditions and producing a first output signal in response to a discharge of said capacitor caused by a change of condition of said regenerative bistable circuit means to the other condition
  • said regenerative bistable circuit means being also responsive to a charging of said capacitor to return said regenerative bistable circuit means to said one condition to'effect a generation of a second output signal; and 9 switching means connected to said motor and adapted to effect a control on the energization of said motor, said switching means being responsive to said first and second output signals from said regenerative bistable-circuit means toturn said motor completely on and completely off, the time period for charging said capacitor determining a constant.
  • said switching means comprises a transistor connected in circuit with said electric motor, said regenerative bistable circuit means effecting a control on said transistor by rendering italtemately completely conductive and completely nonconductive, said regenerative bistable circuit meansincludingan adjustable time delay period;
  • pulse sequences identify a specific number or spe- 6 a signal storage device and support means for supporting said signal storage device for rotation;
  • said electric motor is adapted to drive said storage means for rotation.
  • said capacitor discharge circuit means includes a transistor, the collector-emitter path of which is connected in parallel therewith, the base electrode 10 thereof being responsive to said electrical pulses or pulse sequences from said pulse generator means.

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Stopping Of Electric Motors (AREA)
  • Control Of Direct Current Motors (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)
US00368669A 1972-06-15 1973-06-11 Arrangement for recording pulses Expired - Lifetime US3844512A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19722229240 DE2229240B1 (de) 1972-06-15 1972-06-15 Einrichtung zum aufzeichnen von impulsen

Publications (1)

Publication Number Publication Date
US3844512A true US3844512A (en) 1974-10-29

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ID=5847868

Family Applications (1)

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US00368669A Expired - Lifetime US3844512A (en) 1972-06-15 1973-06-11 Arrangement for recording pulses

Country Status (5)

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US (1) US3844512A (enExample)
AT (1) AT324439B (enExample)
CH (1) CH554043A (enExample)
DE (1) DE2229240B1 (enExample)
GB (1) GB1410888A (enExample)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4013839A (en) * 1974-09-10 1977-03-22 Telstop S.A. System for monitoring dialled telephone numbers
EP0003428A1 (en) * 1978-01-24 1979-08-08 Pendolan Systems Limited Telephone logging apparatus and process

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3004817A (en) * 1961-10-17 wapner
US3094700A (en) * 1959-11-23 1963-06-18 Gen Dynamics Corp Recording control circuit
US3587112A (en) * 1969-11-12 1971-06-22 American District Telegraph Co Electrically operated signal recording device for protective systems

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3004817A (en) * 1961-10-17 wapner
US3094700A (en) * 1959-11-23 1963-06-18 Gen Dynamics Corp Recording control circuit
US3587112A (en) * 1969-11-12 1971-06-22 American District Telegraph Co Electrically operated signal recording device for protective systems

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4013839A (en) * 1974-09-10 1977-03-22 Telstop S.A. System for monitoring dialled telephone numbers
EP0003428A1 (en) * 1978-01-24 1979-08-08 Pendolan Systems Limited Telephone logging apparatus and process

Also Published As

Publication number Publication date
GB1410888A (en) 1975-10-22
DE2229240A1 (enExample) 1973-08-09
AT324439B (de) 1975-08-25
CH554043A (de) 1974-09-13
DE2229240B1 (de) 1973-08-09

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