GB972462A - Electrical key switch - Google Patents

Electrical key switch

Info

Publication number
GB972462A
GB972462A GB17611/63A GB1761163A GB972462A GB 972462 A GB972462 A GB 972462A GB 17611/63 A GB17611/63 A GB 17611/63A GB 1761163 A GB1761163 A GB 1761163A GB 972462 A GB972462 A GB 972462A
Authority
GB
United Kingdom
Prior art keywords
key
piece
lever
moves
springs
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
GB17611/63A
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.)
PRATT READ AND CO Inc
Original Assignee
PRATT READ AND CO Inc
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 PRATT READ AND CO Inc filed Critical PRATT READ AND CO Inc
Publication of GB972462A publication Critical patent/GB972462A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/24—Contacts characterised by the manner in which co-operating contacts engage by abutting with resilient mounting
    • H01H1/242—Contacts characterised by the manner in which co-operating contacts engage by abutting with resilient mounting the contact forming a part of a coil spring
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Push-Button Switches (AREA)

Abstract

972,462. Retractive switches. PRATT, READ & CO. Inc. May 3, 1963 [May 29, 1962], No. 17611/63. Heading H2B. In a key-switch assembly, for example, for an electronic organ, a key-piece 12a connected to a channel-shaped arm 14a pivots about a wall 22, and when the key-piece is depressed, it rotates a lever 70 and moves an insulating member 60, to which coil springs 58 of phosphor bronze wire are connected. These springs 58 join a printed circuit panel 51<SP>1</SP> with the member 60 and complete a circuit with bus-bars 57 when the member 60 is moved, as shown in dotted lines. The key-piece engages lugs 38 and a stop member 37 at the limits of its movement and is biased to its horizontal position by a tension spring 44, attached to chassis member 20. The lever 70 carries felt or like material to deaden the sound of the key-piece engaging it. The member 60 is made of resilient material which flexes as it moves and returns the lever 70 to its original position when the key-piece is released.
GB17611/63A 1962-05-29 1963-05-03 Electrical key switch Expired GB972462A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US198670A US3251923A (en) 1962-05-29 1962-05-29 Keyboard operated electrical switches

Publications (1)

Publication Number Publication Date
GB972462A true GB972462A (en) 1964-10-14

Family

ID=22734305

Family Applications (1)

Application Number Title Priority Date Filing Date
GB17611/63A Expired GB972462A (en) 1962-05-29 1963-05-03 Electrical key switch

Country Status (2)

Country Link
US (1) US3251923A (en)
GB (1) GB972462A (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3317684A (en) * 1964-02-21 1967-05-02 Wurlitzer Co Stop tablet and filter assembly with improved separable resilient positioning means
US3378652A (en) * 1966-06-20 1968-04-16 Hammond Corp Keyboard switch assembly with improved contact means
JPS5232251B1 (en) * 1966-10-31 1977-08-20
US3536819A (en) * 1968-06-21 1970-10-27 Tokyo Shibaura Electric Co Electronic musical instruments with small tone generators adjacent key switches
US4272657A (en) * 1978-01-26 1981-06-09 Nippon Gakki Seizo Kabushiki Kaisha Keyboard assembly for electronic musical instruments
US4901614A (en) * 1986-10-06 1990-02-20 Yamaha Corporation Keyboard apparatus of electronic musical instrument
JP5228743B2 (en) * 2008-09-25 2013-07-03 ヤマハ株式会社 Keyboard device

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1521793A (en) * 1922-07-31 1925-01-06 Holmes Electric Protective Com Alarm device
US2567870A (en) * 1946-09-07 1951-09-11 Conn Ltd C G Switch for electrical musical instruments
US2641153A (en) * 1948-10-26 1953-06-09 Jaymar Specialty Company Hammer action for musical instruments
US2630503A (en) * 1951-03-05 1953-03-03 Central Commercial Ind Inc Electric switch
US2816181A (en) * 1955-12-07 1957-12-10 Chicago Musical Instr Company Switch organization
US3022447A (en) * 1956-12-13 1962-02-20 Vdo Tachometer Werke Adolph Sc Control panel for measuring instruments
US2963564A (en) * 1957-11-14 1960-12-06 Pacific Mercury Television Mfg Keyboard switch
US3013188A (en) * 1958-01-16 1961-12-12 Harry A Kohler Mechanically integrated circuit board and a method of making same by die forms

Also Published As

Publication number Publication date
US3251923A (en) 1966-05-17

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