Patent US4622880A successfully refreshed from Google Patents.
US4622880A
Expired / Lapsed
US
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Chording apparatus for stringed musical instrument
Assignee: Individual
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Filing: 1984-09-20
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Granted: 1986-11-18
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Expires: 2004-09-20
Abstract
Abstract A chording apparatus for stringed musical instruments is provided that automatically forms complex chording arrangements on the instrument keyboard in response to the simple depression of a single button. The chording apparatus hereof includes a unique arrangement of selection buttons, actuating arms, and string depressing hammers, to allow for the selection of a maximum number of chords with a minimum number of apparatus parts. The chording apparatus also includes a unique, one piece biasing plate that urges each of the string depressing hammers to their string clearing positions. The apparatus can be quickly attached or detached from the neck of a string instrument, is adaptable to keyboards of various widths, and is particularly designed for ease of assembly.
Inventors
- 👤 Marvin R. Glemming
- 👤 Walter I. Bieger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 23:03
CPC Classifications
G; G10; G10D; G10D3/00; G10D3/06; G10D3/08
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
158 words
A chording apparatus for a musical instrument having a plurality of strings extending along a keyboard, comprising means for manually selecting a chord to be played; a plurality of individual string depressing means shiftable between string clearing and string depressing positions, each of said individual depressing means being operably engageable with predetermined ones of said strings when in said string depressing position; actuating means responsive to said chord selecting means for shifting predetermined ones of said depressing means to said string depressing positions, at least some of said string depressing means being shiftable by more than one of said actuating means whereby said individual depressing means can be used in multiple chord combinations; and a biasing plate having a plurality of resilient biasing elements integrally molded as part of said plate, each biasing element being operably coupled with a respective one of said string depressing means for urging said respective string depressing means to said string clearing position.
Claim 2
Dependent Claim
158 words
A chording apparatus for a musical instrument having a plurality of strings extending along a keyboard, comprising means for manually selecting a chord to be played; a plurality of individual string depressing means shiftable between string clearing and string depressing positions, each of said individual depressing means being operably engageable with predetermined ones of said strings when in said string depressing position; actuating means responsive to said chord selecting means for shifting predetermined ones of said depressing means to said string depressing positions, at least some of said string depressing means being shiftable by more than one of said actuating means whereby said individual depressing means can be used in multiple chord combinations; and a biasing plate having a plurality of resilient biasing elements integrally molded as part of said plate, each biasing element being operably coupled with a respective one of said string depressing means for urging said respective string depressing means to said string clearing position.
Claim 3
Dependent Claim
42 words
The apparatus as claimed in claim 1, said string depressing means comprising pivotally mounted frames, said frame including at least one projection engageable with preselected ones of said actuating means, and an opposed projection engageable with a selected one of said strings.
Claim 4
Dependent Claim
39 words
The apparatus as claimed in claim 1, said string depressing means being arranged in spaced apart nested sets, whereby the string depressing means of each nested set engage said strings at different points along the length of said keyboard.
Claim 5
Dependent Claim
35 words
The apparatus as claimed in claim 1, said actuating means comprising a plurality of nested, pivotally mounted, U-shaped actuating arms, each of said arms operably coupled with a single one of said chord selecting means.
Claim 6
Dependent Claim
44 words
The apparatus as claimed in claim 1, said biasing elements including a base portion integrally molded with said plate and a tip portion spaced apart from said base portion, said biasing elements gradually narrowing in width from said base portion to said tip portion.
Claim 7
Dependent Claim
12 words
The apparatus as claimed in claim 5, said biasing elements being S-shaped.
Claim 8
Dependent Claim
32 words
The apparatus as claimed in claim 1, said apparatus including positioning means for receiving said keyboard in an aligning fit, said positioning means being selectively adjustable to receive keyboards of various widths.
Claim 9
Dependent Claim
35 words
The apparatus as claimed in claim 7, said positioning means including spaced apart, stepped brackets defining a keyboard receiving gap for receiving said keyboard and selectively detachable inserts for adjusting the width of said gap.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-11-17 | 1990-05-19 | 1990-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-11-17 | 1994-05-19 | 1994-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-11-17 | 1998-05-19 | 1998-11-18 | $7700.00 | Window Closed / Lapsed |