GB974760A - Keying devices, particularly for electrical musical instruments - Google Patents

Keying devices, particularly for electrical musical instruments

Info

Publication number
GB974760A
GB974760A GB3962161A GB3962161A GB974760A GB 974760 A GB974760 A GB 974760A GB 3962161 A GB3962161 A GB 3962161A GB 3962161 A GB3962161 A GB 3962161A GB 974760 A GB974760 A GB 974760A
Authority
GB
United Kingdom
Prior art keywords
core
winding
coupling
saturated
permanent magnet
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
GB3962161A
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
Application filed by ADOLF HEINRICH MICHEL filed Critical ADOLF HEINRICH MICHEL
Publication of GB974760A publication Critical patent/GB974760A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
    • G10H1/00—Details of electrophonic musical instruments
    • G10H1/02—Means for controlling the tone frequencies, e.g. attack or decay; Means for producing special musical effects, e.g. vibratos or glissandos
    • G10H1/04—Means for controlling the tone frequencies, e.g. attack or decay; Means for producing special musical effects, e.g. vibratos or glissandos by additional modulation
    • G10H1/053—Means for controlling the tone frequencies, e.g. attack or decay; Means for producing special musical effects, e.g. vibratos or glissandos by additional modulation during execution only
    • G10H1/055—Means for controlling the tone frequencies, e.g. attack or decay; Means for producing special musical effects, e.g. vibratos or glissandos by additional modulation during execution only by switches with variable impedance elements
    • G10H1/0555—Means for controlling the tone frequencies, e.g. attack or decay; Means for producing special musical effects, e.g. vibratos or glissandos by additional modulation during execution only by switches with variable impedance elements using magnetic or electromagnetic means

Abstract

974,760. Electrophonic organs. A. H. MICHEL. Nov. 6, 1961 [Nov. 9, 1960], No. 39621/61, Heading G5J. [Also in Divisions H1 and H3] A non-contact making switch in an electrophonic organ comprises a transformer with a magnetic core providing a variable magnetic coupling between primary and secondary windings and core being saturated or de-saturated by means of a movable permanent magnet. The impedance of the secondary winding at least is varied along with the magnetic coupling. In Fig. 4 a permanent magnet normally saturates a ferrite core D. The coupling between windings A, B is restored as the magnet is shifted. The core D may have a stepped cross-sectional area so that only the part of the core D within winding B is saturated. The core may have a toroidal form, Fig. 6. The toroidal core may have a varying cross-sectional area, Fig. 7. In a known switch having no permanent magnet, a core D, Fig. 3 is shifted between primary and secondary windings A, B to control the coupling. A core F of electrical conducting material ensures that the reactance of winding B is low when the coupling is low. Coil C compensates for any disturbance induced by winding A in winding B when contact E is closed.
GB3962161A 1960-11-09 1961-11-06 Keying devices, particularly for electrical musical instruments Expired GB974760A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEM47075A DE1138995B (en) 1960-11-09 1960-11-09 Touch device for the transformer coupling of the oscillators of electronic musical instruments

Publications (1)

Publication Number Publication Date
GB974760A true GB974760A (en) 1964-11-11

Family

ID=7305807

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3962161A Expired GB974760A (en) 1960-11-09 1961-11-06 Keying devices, particularly for electrical musical instruments

Country Status (2)

Country Link
DE (1) DE1138995B (en)
GB (1) GB974760A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2159000A (en) * 1984-04-25 1985-11-20 Ici Plc Conrolled inductive coupling device
US4685395A (en) * 1984-04-25 1987-08-11 Imperial Chemical Industries Plc Controlled inductive coupling device

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3255293A (en) * 1963-10-30 1966-06-07 Walker Francis Lee Magnetic control means for an electronic musical instrument
US3637916A (en) * 1970-04-15 1972-01-25 Alvin S Hopping Electronic musical instrument employing differential transformer for signal coupling
DE4310642A1 (en) * 1993-04-01 1994-10-06 Lothar Freund Device for obtaining electrical signals

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR929578A (en) * 1946-06-21 1947-12-31 Electro-magnetic devices for adjusting the attack of sounds produced in electronic organs and similar instruments

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2159000A (en) * 1984-04-25 1985-11-20 Ici Plc Conrolled inductive coupling device
US4685395A (en) * 1984-04-25 1987-08-11 Imperial Chemical Industries Plc Controlled inductive coupling device

Also Published As

Publication number Publication date
DE1138995B (en) 1962-10-31

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