US3761629A - Apparatus for providing delay of an electrical signal - Google Patents

Apparatus for providing delay of an electrical signal Download PDF

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US3761629A
US3761629A US00076358A US3761629DA US3761629A US 3761629 A US3761629 A US 3761629A US 00076358 A US00076358 A US 00076358A US 3761629D A US3761629D A US 3761629DA US 3761629 A US3761629 A US 3761629A
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coil spring
signal
spring
electrical
vibration
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US00076358A
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A Suzuki
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Nippon Gakki Co Ltd
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Nippon Gakki Co Ltd
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    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K15/00—Acoustics not otherwise provided for
    • G10K15/08—Arrangements for producing a reverberation or echo sound
    • G10K15/10—Arrangements for producing a reverberation or echo sound using time-delay networks comprising electromechanical or electro-acoustic devices

Definitions

  • ABSTRACT In audio signal delaying apparatus including a vibration transmission coil spring, an electro-mechanical driver means provided in the vicinity of one end of the spring, and a mechano-electrical pickup means for detecting a signal from the motion of the spring driver due to an input signal through the driver means, the improvement comprises a vibratile motion terminating means provided between the other end of the spring and the pickup means so as to prevent a reflection of vibration at the other end of the spring, said pickup means being movable along the length of the spring, and said coil spring being magnetized.
  • the arrangement can improve the frequency characteristics of the detected signal and enables the provision of an output signal having any delay time.
  • the present invention relates to an apparatus for providing delay of an electrical signal, and more particularly to an improvement in an electro-mechanical signal delay apparatus.
  • a signal delaying apparatus which comprises an electro-mechanical converter for converting an input electrical signal to a mechanical vibration at its input side, a mechano-electrical converter for converting the mechanical vibration to an electrical signal, a coil spring arranged between both the converters for propagating the generated vibration thereon, said both ends of the coil spring being connected to respective magnets of the converters mounted on support plates through support wires, whereby the magnet of the electromechanical converter causes a rotational vibration with an audio signal applied to the input converter, and the other magnet detects the rotational vibration propagated on the spring into an electrical signal.
  • the principal object of the present invention is to provide an improved signal delaying apparatus utilizing a mechanical vibration and capable of easily providing an electrical signal which is arbitrarily delayed in time as desired.
  • Another object of the invention is to provide a novel signal delaying apparatus in which a delayed signal having good frequency characterstics without distortion can be obtained.
  • a further object of the invention is to provide a novel signal delaying apparatus which is simple in constitution, easy to manufacture, and low in manufacturing cost.
  • a still further object of the invention is to provide a novel signal delaying apparatus capable of producing a frequency modulated signal from a non-modulated input signal in addition to delaying the latter.
  • FIG. 1 is a view illustrating the construction of an embodiment of an apparatus for providing delay of an electrical signal according to the present invention
  • FIGS. 2a, 2b and FIGS. 20, 2e are views of sections taken along lines IIA-IIA, IIB-IIB and IIC-IIC shown in FIG. 1 respectively;
  • FIG. 2d is an enlarged view of another example of a damper portion shown in FIG. 1;
  • FIGS. Zfand 2g are diagrams showing the frequency characteristics according to the present invention and the prior art, respectively;
  • FIG. 3 is a view showing another embodiment of the invention.
  • FIG. 4a is a sectional view of another embodiment showing driver means and/or pickup means taken along line IVA-IVA shown in FIG. 3, and FIGS. 4b and 4c are diagrams for illustrating the functions of the invention;
  • FIG. 5 is a view showing a driving device for mechan' ically actuating a mechano-electrical pickup means used in the present invention
  • FIGS. 6a to 6d are diagrams for explaining the operation of the invention.
  • FIGS. 7 to 9 and 12 to 15 are views of modifications of FIG. 1, using the device shown in FIG. 5;
  • FIGS. 10 and 11 are views of modifications of FIG.
  • FIG. 16 is an enlarged perspective view showing a support for supporting an intermediate portion of a coil spring used in the invention.
  • FIG. 17a is a view showing an apparatus according to another embodiment of the invention.
  • FIGS. 17b to 17d are perspective plan and side views of an essential portion of the embodiment shown in FIG. 17a, respectively.
  • FIGS. 18a to 18d are diagrams for explaining the operation in phase of the apparatus shown in FIG. 170.
  • numeral 1 represents an elongated coil spring formed with minute wires made of stainless steel, bicalloy, cunife, cunico, or the like, which is magnetized throughout the length thereof or in an appropriate intermediate portion thereof along its length.
  • One end of the coil spring 1 is connected to a support wire 3 having a pillar-shaped magnet 2 and the other is connected to another wire 3
  • These support wires 3 and 3 are fixed to support plates 4 and 4 mounted on a mount K, respectively, between which the coil spring 1 are subjected to tension to an extent that they are not energized against each other.
  • a U-shaped magnet core 6 around which a coil 5 is wound is arranged to position the magnet within the U- shape of the core, thus forming an electro-mechanical converter 7 at the input side.
  • Numeral 8 represents a damper located at the side of the other end of the coil spring 1, which includes, for example, a substrate 9 and an electrically implanted pile surface formed thereon, said piles 10 being made of acrylic fibre and substantially long. The pile surface is arranged in contact with the side of the coil spring.
  • the portion of the coil spring located close to the other end may be provided, on the respective turns, with electrically implanted piles 10a formed thereon by the use of an adhesive agent in such a way that they contact with each other and that thus they absorb substantial portion of the rotational vibration reaching said

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Vibration Prevention Devices (AREA)

Abstract

In audio signal delaying apparatus including a vibration transmission coil spring, an electro-mechanical driver means provided in the vicinity of one end of the spring, and a mechanoelectrical pickup means for detecting a signal from the motion of the spring driver due to an input signal through the driver means, the improvement comprises a vibratile motion terminating means provided between the other end of the spring and the pickup means so as to prevent a reflection of vibration at the other end of the spring, said pickup means being movable along the length of the spring, and said coil spring being magnetized. The arrangement can improve the frequency characteristics of the detected signal and enables the provision of an output signal having any delay time.

Description

United States Patent [191 Suzuki 1 APPARATUS FOR PROVIDING DELAY OF [73] Assignee: Nippon ,Gakki Seizo Kabushiki Kaisha, Shizuoka-ken, Japan [22] Filed: Sept. 29, 1970 [21] Appl. No.: 76,358
[30] Foreign Application Priority Data 9 Sept. 30, 1969 Japan 44/93334 Sept. 30, 1969 Japan 44/93335 Sept. 30, 1969 Japan 44/93336 Sept. 30,1969 Japan 44/93337 Oct. 25, 1969 Japan 44/101374 Oct 3-1, 1969 Japan 44/103493 Oct. 31, 1969 Japan..... 44/103494 Oct. 31, 1969 Japan 44/103495 Oct. 31, 1969 Japan 44/103496 Oct. 31, 1969 Japan 44/103497 [52] US. Cl. 179/1 J, 84/1.24
[51] Int. Cl. GlOh l/02 [58] Field of Search 179/1 J; 84/124, 84/126, 1.13, 1.14, 1.16; 333/30, 71; 332/2, 26, 5
[56] References Cited UNITED STATES PATENTS 2,089,171 8/1937 Beauchamp 84/1.15 3,199,053 8/1965 Bunger 179/1 J 3,159,713 12/1964 Laube 179/1 J 3,136,853 6/1964 Bissonette 179/1 J MDRIVE my AMP 11] 3,761,629 [451 Sept. 25, 1973 3,472,943 10/1969 Kawabata 84/116 2,493,638 1/1950 Olson 179/1 J 2,437,445 3/1948 Stack 179/1 .1 3,436,482 5/1969 Piess 179/1 J 3,267,198 8/1966 Hurvitz... 34/124 3,463,868 8/1969 Laube 84/124 3,069,956 12/1962 Bode 84/124 3,391,250 7/1968 1(1aiber.... 179/1 J 2,026,841 l/l936 Lesti 84/].15 FOREIGN PATENTS OR APPLICATIONS 1,176,145 2/1967 Great Britain 84/1.16
716,055 1/1953 Great Britain 179/1 J Primary Examiner-Kathleen H. Claffy Assistant Examiner-Jon Bradford Leaheey Att0rney-Cushman, Darby & Cushman [5 7] ABSTRACT In audio signal delaying apparatus including a vibration transmission coil spring, an electro-mechanical driver means provided in the vicinity of one end of the spring, and a mechano-electrical pickup means for detecting a signal from the motion of the spring driver due to an input signal through the driver means, the improvement comprises a vibratile motion terminating means provided between the other end of the spring and the pickup means so as to prevent a reflection of vibration at the other end of the spring, said pickup means being movable along the length of the spring, and said coil spring being magnetized. The arrangement can improve the frequency characteristics of the detected signal and enables the provision of an output signal having any delay time.
5 Claims, 35 Drawing Figures PATENTED 8925MB SIEET 010? 1B NdI INVENTOR. BY 2 W, V W
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INVENTOR- PATENTEU 35725975 sum 07 nr 18 v- Good-W FHrmA/Evs' PATENTEDSEPZBW 3.761.629
sum as or 18 AMP FIG;
FEED BACK DRiVE AMP PATENTEUS PZSIBH PATENTED 3EP25\975 sum 150$ 18 IOBb INVENTCR.
MM Aim/$7 M PATENTED 3925373 3,781 @829 mm 15 HF INVENTOR.
APPARATUS FOR PROVIDING DELAY OF AN ELECTRICAL SIGNAL BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for providing delay of an electrical signal, and more particularly to an improvement in an electro-mechanical signal delay apparatus.
2. Description of the Prior Art In the prior art apparatus of this type, there has been proposed a signal delaying apparatus which comprises an electro-mechanical converter for converting an input electrical signal to a mechanical vibration at its input side, a mechano-electrical converter for converting the mechanical vibration to an electrical signal, a coil spring arranged between both the converters for propagating the generated vibration thereon, said both ends of the coil spring being connected to respective magnets of the converters mounted on support plates through support wires, whereby the magnet of the electromechanical converter causes a rotational vibration with an audio signal applied to the input converter, and the other magnet detects the rotational vibration propagated on the spring into an electrical signal. In such a delaying apparatus, however, a wave propagating the converted vibration is reflected at the termination of the spring and the reflected wave causes an interference with the forward wave, with a result that there occur remarkable variations in the frequency characteristics of the output signal detected by the mechanoelectrical converter. Also,-the apparatus is disadvantageous in that, since the delay time of the signal thus obtained has been made constant with the length of the coil spring, no output signal having any delay time can be produced.
SUMMARY OF THE INVENTION Therefore, the principal object of the present invention is to provide an improved signal delaying apparatus utilizing a mechanical vibration and capable of easily providing an electrical signal which is arbitrarily delayed in time as desired.
Another object of the invention is to provide a novel signal delaying apparatus in which a delayed signal having good frequency characterstics without distortion can be obtained.
A further object of the invention is to provide a novel signal delaying apparatus which is simple in constitution, easy to manufacture, and low in manufacturing cost.
A still further object of the invention is to provide a novel signal delaying apparatus capable of producing a frequency modulated signal from a non-modulated input signal in addition to delaying the latter.
Other object, features and advantages of the present invention will become apparent from the following description of preferred embodiments when taken in conjunction with the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view illustrating the construction of an embodiment of an apparatus for providing delay of an electrical signal according to the present invention;
FIGS. 2a, 2b and FIGS. 20, 2e (a modification) are views of sections taken along lines IIA-IIA, IIB-IIB and IIC-IIC shown in FIG. 1 respectively;
FIG. 2d is an enlarged view of another example of a damper portion shown in FIG. 1;
FIGS. Zfand 2g are diagrams showing the frequency characteristics according to the present invention and the prior art, respectively;
FIG. 3 is a view showing another embodiment of the invention;
FIG. 4a is a sectional view of another embodiment showing driver means and/or pickup means taken along line IVA-IVA shown in FIG. 3, and FIGS. 4b and 4c are diagrams for illustrating the functions of the invention;
FIG. 5 is a view showing a driving device for mechan' ically actuating a mechano-electrical pickup means used in the present invention;
FIGS. 6a to 6d are diagrams for explaining the operation of the invention;
FIGS. 7 to 9 and 12 to 15 are views of modifications of FIG. 1, using the device shown in FIG. 5;
FIGS. 10 and 11 are views of modifications of FIG.
FIG. 16 is an enlarged perspective view showing a support for supporting an intermediate portion of a coil spring used in the invention;
FIG. 17a is a view showing an apparatus according to another embodiment of the invention;
FIGS. 17b to 17d are perspective plan and side views of an essential portion of the embodiment shown in FIG. 17a, respectively; and
FIGS. 18a to 18d are diagrams for explaining the operation in phase of the apparatus shown in FIG. 170.
DESCRIPTION OF THE PREFERRED EMBODIMENTS In the description of the following embodiments, same reference numerals and symbols indicate same parts.
Now, by referring to FIG. 1, there is shown an apparatus according to an embodiment of the present invention, in which numeral 1 represents an elongated coil spring formed with minute wires made of stainless steel, bicalloy, cunife, cunico, or the like, which is magnetized throughout the length thereof or in an appropriate intermediate portion thereof along its length. One end of the coil spring 1 is connected to a support wire 3 having a pillar-shaped magnet 2 and the other is connected to another wire 3 These support wires 3 and 3 are fixed to support plates 4 and 4 mounted on a mount K, respectively, between which the coil spring 1 are subjected to tension to an extent that they are not energized against each other. Close to the magnet 2 a U-shaped magnet core 6 around which a coil 5 is wound is arranged to position the magnet within the U- shape of the core, thus forming an electro-mechanical converter 7 at the input side. Numeral 8 represents a damper located at the side of the other end of the coil spring 1, which includes, for example, a substrate 9 and an electrically implanted pile surface formed thereon, said piles 10 being made of acrylic fibre and substantially long. The pile surface is arranged in contact with the side of the coil spring. Alternatively, as shown in FIG. 2d, the portion of the coil spring located close to the other end may be provided, on the respective turns, with electrically implanted piles 10a formed thereon by the use of an adhesive agent in such a way that they contact with each other and that thus they absorb substantial portion of the rotational vibration reaching said

Claims (5)

1. An apparatus for providing delay of an electrical signal comprising at least one magnetized coil spring means for supporting said spring under tension at both ends thereof, electro-mechanical driver means having an electrical input terminal and provided in the vicinity of one end of said coil spring for vibrating said spring in accordance with a signal applied to said input terminal, vibration absorbing means provided at the side of the other end of said coil spring for preventing reflection of the vibration and at least one mechanoelectrical pickup means located intermediately of the length of said coil spring between said ends untouchably therewith for magnetically detecting the vibration of the spring and converting it to an electrical signal, said pickup means having an electrical output terminal, and means for moving reciprocally said pick-up means along the length of said coil spring to thereby produce a frequency modulated signal at the output terminal of said pick-up means.
2. The apparatus according to claim 1, which comprises a feedback circuit connected between the input terminal of said driver means and the output terminal of said pickup means.
3. The apparatus according to claim 1, which comprises a mixing circuit for superposing the input signal on the frequency modulated signal derived at the output terminal of said pickup means.
4. The apparatus according to claim 1, which comprises a first and a second electro-acoustic transducers connected with said input terminal and said output terminal respectively, said first and second transducers generating sounds from said input signal and said frequency modulated signal respectively so that said sounds are mixed.
5. An apparatus for providing delay of an electric signal comprising: a magnetized coil spring supported under tension at both ends thereof; electro-mechanical driving means having an electrical input terminal and provided in the vicinity of one end of said coil spring for vibrating the latter in accordance with a signal applied to said input terminal; vibration absorbing means provided at the side of the other end of said coil spring for preventing reflection of the vibration; a plurality of mechano-electrical pickup means located intermediately of the length of said coil spring untouchably therewith for magnetically detecting the vibration of the spring and converting it to an electrical signal, each of said pickup means having an electrical output terminal; and actuating means for reciprocally moving said pickup means along the length of the coil spring.
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3939436A (en) * 1973-12-07 1976-02-17 Itt Industries, Inc. Reverberation device
US3939437A (en) * 1973-12-07 1976-02-17 Itt Industries, Inc. All-pass reverberator with an MOS delay line
US4119933A (en) * 1976-03-26 1978-10-10 Telediffusion De France Mechanical artificial reverberation apparatus
US4449234A (en) * 1981-02-13 1984-05-15 Sony Corporation Reverberation apparatus

Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2026841A (en) * 1935-06-05 1936-01-07 Lesti Arnold Electric translating-device for musical instruments
US2089171A (en) * 1934-06-02 1937-08-10 Electro String Instr Corp Electrical stringed musical instrument
US2437445A (en) * 1944-11-07 1948-03-09 Twentieth Cent Fox Film Corp Sound reverberating device
US2493638A (en) * 1946-06-22 1950-01-03 Rca Corp Synthetic reverberation system
GB716055A (en) * 1952-02-12 1954-09-29 British Thomson Houston Co Ltd Improvements in and relating to sound reproduction
US3069956A (en) * 1960-04-21 1962-12-25 Harald E W Bode Electronic apparatus
US3136853A (en) * 1961-04-12 1964-06-09 Baldwin Co D H Music enhancing systems
US3159713A (en) * 1961-03-10 1964-12-01 Hammond Organ Co Artificial reverberation device
US3199053A (en) * 1964-09-18 1965-08-03 Baldwin Co D H Tapered spring reverberation delay line
US3267198A (en) * 1964-03-04 1966-08-16 Hurvitz Hyman Music enhancement
US3391250A (en) * 1964-12-21 1968-07-02 Wurlitzer Co Reverberation unit
US3436482A (en) * 1964-04-16 1969-04-01 Akustische Und Kino Gerate Gmb Microphone assembly with self-contained power supply
US3463868A (en) * 1966-06-02 1969-08-26 Hammond Corp Electric musical instrument reverberation nonlinear control system
US3472943A (en) * 1965-10-15 1969-10-14 Nippon Musical Instruments Mfg Pickup and circuit for stringed musical instrument
GB1176145A (en) * 1966-02-26 1970-01-01 Baldwin Burns Ltd Improvements in or Relating to Magnetic Pick-ups for Stringed Instruments

Patent Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2089171A (en) * 1934-06-02 1937-08-10 Electro String Instr Corp Electrical stringed musical instrument
US2026841A (en) * 1935-06-05 1936-01-07 Lesti Arnold Electric translating-device for musical instruments
US2437445A (en) * 1944-11-07 1948-03-09 Twentieth Cent Fox Film Corp Sound reverberating device
US2493638A (en) * 1946-06-22 1950-01-03 Rca Corp Synthetic reverberation system
GB716055A (en) * 1952-02-12 1954-09-29 British Thomson Houston Co Ltd Improvements in and relating to sound reproduction
US3069956A (en) * 1960-04-21 1962-12-25 Harald E W Bode Electronic apparatus
US3159713A (en) * 1961-03-10 1964-12-01 Hammond Organ Co Artificial reverberation device
US3136853A (en) * 1961-04-12 1964-06-09 Baldwin Co D H Music enhancing systems
US3267198A (en) * 1964-03-04 1966-08-16 Hurvitz Hyman Music enhancement
US3436482A (en) * 1964-04-16 1969-04-01 Akustische Und Kino Gerate Gmb Microphone assembly with self-contained power supply
US3199053A (en) * 1964-09-18 1965-08-03 Baldwin Co D H Tapered spring reverberation delay line
US3391250A (en) * 1964-12-21 1968-07-02 Wurlitzer Co Reverberation unit
US3472943A (en) * 1965-10-15 1969-10-14 Nippon Musical Instruments Mfg Pickup and circuit for stringed musical instrument
GB1176145A (en) * 1966-02-26 1970-01-01 Baldwin Burns Ltd Improvements in or Relating to Magnetic Pick-ups for Stringed Instruments
US3463868A (en) * 1966-06-02 1969-08-26 Hammond Corp Electric musical instrument reverberation nonlinear control system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3939436A (en) * 1973-12-07 1976-02-17 Itt Industries, Inc. Reverberation device
US3939437A (en) * 1973-12-07 1976-02-17 Itt Industries, Inc. All-pass reverberator with an MOS delay line
US4119933A (en) * 1976-03-26 1978-10-10 Telediffusion De France Mechanical artificial reverberation apparatus
US4449234A (en) * 1981-02-13 1984-05-15 Sony Corporation Reverberation apparatus

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