Source: http://www.google.nl/patents/US4075921?hl=nl
Timestamp: 2013-05-20 11:54:36
Document Index: 575940303

Matched Legal Cases: ['art 19656', 'art 197411', 'art 1975', 'art 1990', 'art 2000', 'art 2009', 'art 1997']

Patent US4075921 - String instrument vibration initiator and sustainer - Google PatentenZoeken Afbeeldingen Maps Play YouTube Nieuws Gmail Drive Meer » Geavanceerd zoeken naar patenten | Webgeschiedenis | Inloggen Geavanceerd zoeken naar patenten PatentenAn apparatus for initiating and sustaining vibrations of a string in a musical instrument. A hand-held (or permanently mounted) device senses the vibration of the string and provides an output driving signal for sustaining the vibrations....http://www.google.nl/patents/US4075921?utm_source=gb-gplus-sharePatent US4075921 - String instrument vibration initiator and sustainer PublicatienummerUS4075921 APublicatietypeVerlening Aanvraagnummer05/746,690 Publicatiedatum28 feb 1978 Aanvraagdatum2 dec 1976 Prioriteitsdatum14 juli 1975 UitvindersGregory S. Heet Oorspronkelijke patenteigenaarHeet; Gregory S. Classificatie in de VS84/738984/375 Internationale classificatieG10D3/00G10H3/22G10H3/26G10D3/18G10H3/00 Co�peratieve classificatieG10H3/26 Europese classificatieG10H 3/26ReferentiesPatentcitaties (11) Verwijzingen naar dit patent (44)Externe linksUSPTO USPTO-toewijzing EspacenetString instrument vibration initiator and sustainerUS 4075921 A Samenvatting An apparatus for initiating and sustaining vibrations of a string in a musical instrument. A hand-held (or permanently mounted) device senses the vibration of the string and provides an output driving signal for sustaining the vibrations.
I claim: 1. An apparatus for initiating or sustaining the vibration of at least one string of a musical instrument having a plurality of generally parallel, spaced apart, coplanar strings comprising: a housing adaptable for being hand-held, said housing defining a channel; at least one pair of coils disposed within said channel of said housing; guide means comprising a pair of parallel guides defined by said housing and disposed on opposite edges of said channel such that when said pair of guides engage alternate strings said channel straddles at least one intermediate string; and, amplifier means having an input coupled to one of said coils and an output coupled to the other of said coils; whereby said intermediate string may be set in motion by said amplifier means and coils and said motion is sustained by said amplifier means and coils.
2. The apparatus defined by claim 1 including a battery disposed within said housing and coupled to said amplifier means.
4. An apparatus for initiating, sustaining and varying vibrations of strings in a musical instrument having at least a first and a second string comprising: a hand-holdable housing for manual manipulation adjacent to said strings; said housing including total circuit means providing electromagnet coupling between said apparatus and said strings for initiating, sustaining and varying the vibrations of said strings without additional electrical devices; said circuit means including coil means for picking up the vibrations of one of said strings and for driving said same string, amplifier means coupled to said coil means, and power supply means coupled to said amplifier; guide means coupled to said housing for positioning said housing with respect to said first string to permit manual manipulation of said housing with respect to said second string and for maintaining said coil means in alignment with respect to said second string during manual manipulation; whereby by the manipulation of said housing a plurality of sound effects may be obtained.
5. The apparatus defined by claim 4 wherein said coil means includes a pair of coils, one of said coils being a pickup coil, the other coil being a driving coil.
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