GB1367014A - Musical instrument keying assembly - Google Patents

Musical instrument keying assembly

Info

Publication number
GB1367014A
GB1367014A GB5354572A GB5354572A GB1367014A GB 1367014 A GB1367014 A GB 1367014A GB 5354572 A GB5354572 A GB 5354572A GB 5354572 A GB5354572 A GB 5354572A GB 1367014 A GB1367014 A GB 1367014A
Authority
GB
United Kingdom
Prior art keywords
strip
strips
musical instrument
assembly
spring
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
GB5354572A
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.)
Opsonar Organ Corp
Original Assignee
Opsonar Organ Corp
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 Opsonar Organ Corp filed Critical Opsonar Organ Corp
Publication of GB1367014A publication Critical patent/GB1367014A/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
    • G10H1/32—Constructional details
    • G10H1/34—Switch arrangements, e.g. keyboards or mechanical switches specially adapted for electrophonic musical instruments
    • G10H1/344—Structural association with individual keys
    • 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
    • G10H2220/00—Input/output interfacing specifically adapted for electrophonic musical tools or instruments
    • G10H2220/155—User input interfaces for electrophonic musical instruments
    • G10H2220/265—Key design details; Special characteristics of individual keys of a keyboard; Key-like musical input devices, e.g. finger sensors, pedals, potentiometers, selectors
    • G10H2220/275—Switching mechanism or sensor details of individual keys, e.g. details of key contacts, hall effect or piezoelectric sensors used for key position or movement sensing purposes; Mounting thereof
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/02—Contacts characterised by the material thereof
    • H01H1/021—Composite material
    • H01H1/029—Composite material comprising conducting material dispersed in an elastic support or binding material
    • Y—GENERAL 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S84/00—Music
    • Y10S84/07—Electric key switch structure

Abstract

1367014 Electrophonic musical instruments OPSONAR ORGAN CORP 20 Nov 1972 [24 April 1972] 53545/72 Heading G5J [Also in Division H1] In a switch assembly for the keyboard of an electronic musical instrument, a conductive strip 26, Fig. 2, of resilient material such as silicone rubber impregnated with carbon is deformed to give a progressively increasing area of engagement with wire contacts 22, 24 mounted on a support base 28. The strip 26 is permanently connected as one input to an amplifier (18), Fig. 1 (not shown), and is supported above an apertured separator plate 30 by means of an earthed resilient conductive strip 38 of similar material to which it is fixed by a double-sided adhesive insulating tape 40. The strips 26 are progressively rolled edgewise on to the wires 22, 24 by leaf springs 45, Fig. 3, fixed to pivotedkeys 34 whereby the full width of the strips 26 is not engaged until the keys 34 and springs 45 are fully depressed. The progressive engagement is stated to reduce microphonic noise. In a modification the switches are actuated by chord buttons (70) Fig. 10 (not shown) which depress the ends of spring (76) cut integrally in a spring strip (78) and mounted above the assembly. The contacts may be lubricated with graphite to reduce sticking and consequent microphonic noise.
GB5354572A 1972-04-24 1972-11-20 Musical instrument keying assembly Expired GB1367014A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US24705672A 1972-04-24 1972-04-24

Publications (1)

Publication Number Publication Date
GB1367014A true GB1367014A (en) 1974-09-18

Family

ID=22933372

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5354572A Expired GB1367014A (en) 1972-04-24 1972-11-20 Musical instrument keying assembly

Country Status (6)

Country Link
US (1) US3769869A (en)
JP (1) JPS4955318A (en)
CA (1) CA981070A (en)
DE (2) DE7243122U (en)
GB (1) GB1367014A (en)
IT (1) IT975817B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2178237A (en) * 1985-06-24 1987-02-04 Alps Electric Co Ltd Push button switch

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3941023A (en) * 1974-06-14 1976-03-02 The Wurlitzer Company Chord button assembly
US4153987A (en) * 1974-12-09 1979-05-15 Texas Instruments Incorporated Method for assembling keyboard
US3995128A (en) * 1975-01-10 1976-11-30 Texas Instruments Incorporated Pushbutton keyboard system having preformed recessed support with contacts mounted on face and in recesses
US4160400A (en) * 1975-09-29 1979-07-10 Marmon Company Touch responsive keying unit for electronic musical instruments
US4035593A (en) * 1975-10-09 1977-07-12 Northern Engraving Company, Inc. Flexible pressure sensitive switch actuator module adaptable to a keyboard surface having fixed contact array
US4365536A (en) * 1980-10-27 1982-12-28 Whirlpool Corporation Sliding actuator membrane switch for organ keyboard
US4373124A (en) * 1981-01-26 1983-02-08 W. H. Brady Co. Capacitance switch
US4373122A (en) * 1981-01-26 1983-02-08 W. H. Brady Co. Capacitance switch
US4367385A (en) * 1981-01-26 1983-01-04 W. H. Brady Co. Capacitance switch
US4456800A (en) * 1983-05-25 1984-06-26 Allen-Bradley Company Planar contact array switch having improved ground path for dissipating electrostatic discharges
US4678880A (en) * 1984-04-18 1987-07-07 Omron Tateisi Electronics Co. Keyboard switch
US4843197A (en) * 1986-10-31 1989-06-27 Idec Izumi Corporation Bush switch and method of production thereof

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2497661A (en) * 1948-06-10 1950-02-14 Gen Electric Electronic musical instrument
US2575230A (en) * 1948-07-03 1951-11-13 Baldwin Co Electrically noiseless progressive contact means
US2873637A (en) * 1954-03-26 1959-02-17 Rca Corp Touch control for polyphonic musical instruments
US2959693A (en) * 1955-12-30 1960-11-08 Baldwin Piano Co Key switching system for electrical musical instruments
US3041568A (en) * 1959-08-07 1962-06-26 Baldwin Piano Co Renewable switch construction
US3328507A (en) * 1963-06-28 1967-06-27 Richard H Peterson Electronic musical instrument
US3626350A (en) * 1969-02-20 1971-12-07 Nippon Musical Instruments Mfg Variable resistor device for electronic musical instruments capable of playing monophonic, chord and portamento performances with resilient contact strips
US3657459A (en) * 1970-11-02 1972-04-18 Mattel Inc Musical instrument with variable amplitude
US3694559A (en) * 1970-11-04 1972-09-26 Nippon Musical Instruments Mfg Electronic musical instrument employing variable resistor fingerboards
US3643041A (en) * 1970-12-30 1972-02-15 Unidynamics Phoenix Pushbutton diaphragm switch with improved dimple actuator and/or capacitance-type switch contact structure
US3668337A (en) * 1971-01-18 1972-06-06 Thomas & Betts Corp Matrix switch with improved flexible insulative spacer arrangement
US3657460A (en) * 1971-01-22 1972-04-18 Mattel Inc Organ keyboard switching system
US3715447A (en) * 1971-05-13 1973-02-06 Nippon Musical Instruments Mfg Electronic musical instrument with a keyboard device capable of producing special musical effects upon key depression

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2178237A (en) * 1985-06-24 1987-02-04 Alps Electric Co Ltd Push button switch

Also Published As

Publication number Publication date
JPS4955318A (en) 1974-05-29
DE2257553A1 (en) 1973-11-08
DE7243122U (en) 1973-05-24
CA981070A (en) 1976-01-06
US3769869A (en) 1973-11-06
IT975817B (en) 1974-08-10

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees