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US4160401A Expired / Lapsed US ⏱️ 0.0 years remaining

String vibration transducer bridge for electric stringed instruments

Assignee: CHUSHIN GAKKI SEIZO KK
•
Filing: 1977-10-12
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Granted: 1979-07-10
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Expires: 1997-10-12
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Abstract

Abstract A string vibration transducer bridge for an electric string instrument including a plurality of string tension mechanism provided side by side in the bridge and which are adjustably movable along the direction of the string and includes a plurality of string supporting electrode parts which are slidably movable along the direction of the string and rotatable along a direction perpendicular to the string, a plurality of independent piezoelectric transducers which each engage with an undersurface of an electrode part, and a plurality of piezoelectric transducer pushing mechanisms for pushing the piezoelectric transducers against the electrode parts whereby the tension of the string may be adjusted by both the string tension mechanism and the transducer pushing mechanism and the vibration from each string is independently sensed.

Inventors

  • 👤 Michiaki Tomioka

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-27 09:26
CPC Classifications
G; G10; G10D; G10D3/00; G10D3/14; G10H; G10H3/00; G10H3/12; G10H3/14; G10H3/18; G10H3/185; G10H2220/00; G10H2220/461; G10H2220/465; G10H2220/481; G10H2220/485; G10H2220/525; Y; Y10; Y10S; Y10S84/00; Y10S84/24

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 165 words
A string vibration transducer bridge for an electric instrument having strings comprising: a bridge box; a plurality of independent string tension mechanisms provided side by side in said bridge body and which are adjustably movable along the direction of said string, said string tension mechanism further including a plurality of independent electrically conductive string supporting electrode parts independently slidably movable in said bridge body along the direction of said strings and independently rotatable along the direction perpendicular to said string; a plurality of independent piezoelectric transducers provided in said bridge box which each engage with an undersurface of an electrode parts to form an electrical connection therewith and are substantially perpendicular to said tension mechanisms; and a plurality of piezoelectric transducer pushing mechanisms provided in said bridge box for pushing said piezoelectric transducer against said electrode parts whereby the tension of said string maybe set by both said string tension mechanism and said transducer pushing mechanism and the vibration of each string is independently sensed.
Claim 2
Dependent Claim 165 words
A string vibration transducer bridge for an electric instrument having strings comprising: a bridge box; a plurality of independent string tension mechanisms provided side by side in said bridge body and which are adjustably movable along the direction of said string, said string tension mechanism further including a plurality of independent electrically conductive string supporting electrode parts independently slidably movable in said bridge body along the direction of said strings and independently rotatable along the direction perpendicular to said string; a plurality of independent piezoelectric transducers provided in said bridge box which each engage with an undersurface of an electrode parts to form an electrical connection therewith and are substantially perpendicular to said tension mechanisms; and a plurality of piezoelectric transducer pushing mechanisms provided in said bridge box for pushing said piezoelectric transducer against said electrode parts whereby the tension of said string maybe set by both said string tension mechanism and said transducer pushing mechanism and the vibration of each string is independently sensed.
Claim 3
Dependent Claim 24 words
A string vibration transducer bridge according to claim 1 wherein the output of each piezoelectric transducer is independently sent out from the transducer bridge.
Claim 4
Dependent Claim 30 words
A string vibration transducer bridge according to claim 2 further comprising a linear rheostats provided on said electric instrument and provided in series with the output of each piezoelectric transducer.
Claim 5
Dependent Claim 16 words
A string vibration transducer bridge according to claim 3 wherein said rheostats are sliding linear rheostats.
Claim 6
Dependent Claim 24 words
A string vibration transducer bridge according to claim 2 further comprising a pickup housing provided in said bridge body for holding said piezoelectric transducer.
Claim 7
Dependent Claim 30 words
A string vibration transducer bridge according to claim 5 wherein said bridge body is made from an electrically conductive material and said pickup housing is made from an insulative material.

References Cited (Backward Citations)

US2968204A Cited
US3178501A Cited
US3600497A Cited
US3530228A Cited
US3948138A Cited
US4069732A Cited
US4031799A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1982-07-09 1983-01-08 1983-07-10 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1986-07-09 1987-01-08 1987-07-10 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1990-07-09 1991-01-08 1991-07-10 $7700.00 Window Closed / Lapsed

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