GB1006095A - Keying devices, particularly for electrical musical instruments - Google Patents

Keying devices, particularly for electrical musical instruments

Info

Publication number
GB1006095A
GB1006095A GB4623961A GB4623961A GB1006095A GB 1006095 A GB1006095 A GB 1006095A GB 4623961 A GB4623961 A GB 4623961A GB 4623961 A GB4623961 A GB 4623961A GB 1006095 A GB1006095 A GB 1006095A
Authority
GB
Grant status
Application
Patent type
Prior art keywords
impedance
transformers
controlled
connected
series
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
Application number
GB4623961A
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.)
ADOLF HEINRICH MICHEL
Original Assignee
ADOLF HEINRICH MICHEL
Priority date (The priority date 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 date listed.)
Filing date
Publication date

Links

Classifications

    • HELECTRICITY
    • H03BASIC ELECTRONIC CIRCUITRY
    • H03KPULSE TECHNIQUE
    • H03K17/00Electronic switching or gating, i.e. not by contact-making or -braking
    • H03K17/94Electronic switching or gating, i.e. not by contact-making or -braking characterised by the way in which the control signal is generated
    • H03K17/965Switches controlled by moving an element forming part of the switch
    • H03K17/97Switches controlled by moving an element forming part of the switch using a magnetic movable element
    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10HELECTROPHONIC MUSICAL INSTRUMENTS
    • G10H1/00Details of electrophonic musical instruments
    • G10H1/02Means for controlling the tone frequencies, e.g. attack, decay; Means for producing special musical effects, e.g. vibrato, glissando
    • G10H1/04Means for controlling the tone frequencies, e.g. attack, decay; Means for producing special musical effects, e.g. vibrato, glissando by additional modulation
    • G10H1/053Means for controlling the tone frequencies, e.g. attack, decay; Means for producing special musical effects, e.g. vibrato, glissando by additional modulation during execution only
    • G10H1/055Means for controlling the tone frequencies, e.g. attack, decay; Means for producing special musical effects, e.g. vibrato, glissando by additional modulation during execution only by switches with variable impedance elements
    • G10H1/0555Means for controlling the tone frequencies, e.g. attack, decay; Means for producing special musical effects, e.g. vibrato, glissando by additional modulation during execution only by switches with variable impedance elements using magnetic or electromagnetic means
    • HELECTRICITY
    • H03BASIC ELECTRONIC CIRCUITRY
    • H03KPULSE TECHNIQUE
    • H03K17/00Electronic switching or gating, i.e. not by contact-making or -braking
    • H03K17/94Electronic switching or gating, i.e. not by contact-making or -braking characterised by the way in which the control signal is generated
    • H03K17/965Switches controlled by moving an element forming part of the switch
    • H03K17/97Switches controlled by moving an element forming part of the switch using a magnetic movable element
    • H03K2017/9706Inductive element
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S84/00Music
    • Y10S84/07Electric key switch structure

Abstract

1,006,095. Electrophonic musical instruments. A. H. MICHEL. Dec. 27, 1961 [Jan. 13, 1961], No. 46239/61. Addition to 974,760. Heading G5J. [Also in Division H3] In a keying circuit for an electrophonic musical instrument, circuits are coupled by transformers connected either in cascade or with their secondary windings in series. The transformer cores are soluble and are controlled by permanent magnets operated by keys. The impedance of an output winding is changed as the coupling between transformer windings changes. The coupling and the impedance being reduced or increased together. In Fig. 3, a signal source Tn is coupled to an output circuit V by transformers K 1 to K n which, as indicated, are controlled by permanent magnets. An additional core Z connected in series with secondary and primary windings of successive transformers may or may not be controlled by a permanent magnet. When transformers K 1 , K n are coupled and the impedance of output circuit V is high, the impedance of Z is reduced by saturation. In Fig. 4, the secondaries of transformers K 1 , K 2 are connected in series, only one of the transformers being controlled. A controlled impedance Z is connected across the secondaries. In the uncoupled condition of the keying device, the impedance of Z is low.
GB4623961A 1961-01-13 1961-12-27 Keying devices, particularly for electrical musical instruments Expired GB1006095A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEM0047686 1961-01-13

Publications (1)

Publication Number Publication Date
GB1006095A true true GB1006095A (en) 1965-09-29

Family

ID=7305993

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4623961A Expired GB1006095A (en) 1961-01-13 1961-12-27 Keying devices, particularly for electrical musical instruments

Country Status (2)

Country Link
US (1) US3353030A (en)
GB (1) GB1006095A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105845405A (en) * 2016-06-02 2016-08-10 福州大学 Discrete magnetic element coupling circuit and control method based on the circuit

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3594488A (en) * 1968-03-18 1971-07-20 Nippon Musical Instruments Mfg Electronic musical system with magnetic field responsive switch and volume control
US3590134A (en) * 1968-03-29 1971-06-29 Nippon Musical Instruments Mfg Electronic musical system with magnetic field responsive switch and volume control
US3617600A (en) * 1968-03-30 1971-11-02 Nippon Musical Instruments Mfg Magnetic field responsive key switch device for producing attack effect in electronic musical instruments
US3598890A (en) * 1968-06-25 1971-08-10 Nippon Musical Instruments Mfg Electronic musical instrument with magneto-sensitive elements and movable permanent magnet providing glissando
JPS4815866B1 (en) * 1968-08-13 1973-05-17
US3708605A (en) * 1969-06-28 1973-01-02 Nippon Musical Instruments Mfg Magnetically operated keying device for an electronic musical instrument with touch responsive control
US3793532A (en) * 1970-01-26 1974-02-19 Vilinsky M Multiple pulse generator
US3637916A (en) * 1970-04-15 1972-01-25 Alvin S Hopping Electronic musical instrument employing differential transformer for signal coupling
JPS5040781Y2 (en) * 1971-02-25 1975-11-20
US3828643A (en) * 1973-02-20 1974-08-13 Chicago Musical Instr Co Scanner for electronic musical instrument
US4627292A (en) * 1984-07-03 1986-12-09 Randek Inc. AC transducers, methods and systems

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2781503A (en) * 1953-04-29 1957-02-12 American Mach & Foundry Magnetic memory circuits employing biased magnetic binary cores
NL209920A (en) * 1955-08-26

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105845405A (en) * 2016-06-02 2016-08-10 福州大学 Discrete magnetic element coupling circuit and control method based on the circuit
CN105845405B (en) * 2016-06-02 2018-06-12 福州大学 Species discrete coupling circuit and a control method for a magnetic element

Also Published As

Publication number Publication date Type
US3353030A (en) 1967-11-14 grant

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