# US 10,482,852 B2 · Button fretboard assembly for an instrument

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- Number: US 10,482,852 B2
- Document ID: US10482852B2
- Status: Granted
- Kind: B2
- Application number: 16/280,030
- Filed: 2019-02-19
- Published: 2019-10-10
- Granted: 2019-11-19
- Earliest claimed: 2018-04-05
- Applicants: William L. Douglas
- Inventors: William L. Douglas
- Web page: https://patentgrep.com/patent/US10482852B2

## CPC

- G10D 3/08: Fingerboards in the form of keyboards
- G10D: STRINGED MUSICAL INSTRUMENTS; WIND MUSICAL INSTRUMENTS; ACCORDIONS OR CONCERTINAS; PERCUSSION MUSICAL INSTRUMENTS; AEOLIAN HARPS; SINGING-FLAME MUSICAL INSTRUMENTS; MUSICAL INSTRUMENTS NOT OTHERWISE PROVIDED FOR (organs, harmoniums or similar wind musical instruments with associated blowing apparatus G10B; pianos, harpsichords, spinets or similar stringed musical instruments with one or more keyboards G10C; automatic musical instruments G10F; electrophonic musical instruments in which tones are generated by electromechanical means G10H)

## Abstract

An assembly for an instrument includes a fretboard having a width, a length, a top surface, frets projecting from the top surface and spaced apart along the length, strings arranged above the top surface across the width, and recesses formed into the fretboard between the frets and below the strings. A button is carried in each recess for reciprocal movement along an axis between a raised position and a depressed position. In the depressed position, the button is in contact with one of the strings and depresses the one of the strings against a proximate fret. In the raised position, the button is out of contact with the one of the strings.

## Claims

### Claim 1

An assembly for an instrument, the assembly comprising:
a fretboard having a width, a length, a top surface, frets projecting from the top surface and spaced apart along the length, strings arranged above the top surface across the width, and recesses formed into the fretboard between the frets and below the strings;
a button is carried in each recess for reciprocal movement along an axis between a raised position and a depressed position, wherein the button has a hole formed transversely through the button, and one of the strings is passed through the hole;
in the depressed position, the button is in contact with the one of the strings and depresses the one of the strings against a proximate fret; and
in the raised position, the button is out of contact with the one of the strings.

### Claim 2 (depends on 1)

The assembly of claim 1, wherein:
the recess includes a cavity and a peripheral slot in communication with the cavity;
the button has a body and a finger extending from the body; and
the body of the button is received in the cavity, and the finger of the button is received in the slot, wherein the slot limits movement of the button in directions other than along the axis.

### Claim 3 (depends on 1)

The assembly of claim 1, wherein the button is biased toward the raised position.

### Claim 4 (depends on 1)

The assembly of claim 1, wherein:
the button has a top and a bottom, and a post projecting from the bottom; and
a spring is captured on the post and disposed in the recess between a bottom of the recess and the bottom of the button.

### Claim 5 (depends on 1)

The assembly of claim 1, wherein the hole has a cylindrical inner surface.

### Claim 6 (depends on 1)

The assembly of claim 1, wherein the hole has a quasi-cylindrical inner surface and a flat upper surface.

### Claim 7

An assembly for an instrument, the assembly comprising:
a fretboard having a width, a length, a top surface, frets projecting from the top surface and spaced apart along the length, and strings arranged above the top surface across the width;
between adjacent frets, recesses formed into the fretboard below the strings;
in each of the recesses between adjacent frets, a button is carried for reciprocal movement between a raised position and a depressed position, wherein the button has a hole formed transversely through the button, and one of the strings is passed through the hole;
in the depressed position, the button is in contact with the one of the strings and depresses the one of the strings against a proximate fret; and
in the raised position, the button is out of contact with the one of the strings.

### Claim 8 (depends on 7)

The assembly of claim 7, wherein:
the recess includes a cavity and a peripheral slot in communication with the cavity;
the button has a body and a finger extending from the body; and
the body of the button is received in the cavity, and the finger of the button is received in the slot, wherein the slot limits movement of the button in directions other than along the axis.

### Claim 9 (depends on 7)

The assembly of claim 7, wherein the button is biased toward the raised position.

### Claim 10 (depends on 7)

The assembly of claim 7, wherein:
the button has a top and a bottom, and a post projecting from the bottom; and
a spring is captured on the post and disposed in the recess between a bottom of the recess and the bottom of the button.

### Claim 11 (depends on 7)

The assembly of claim 7, wherein the hole has a cylindrical inner surface.

### Claim 12 (depends on 7)

The assembly of claim 7, wherein the hole has a quasi-cylindrical inner surface and a flat upper surface.

### Claim 13

An assembly for an instrument, the assembly comprising:
a fretboard having a width, a length, a top surface, frets projecting from the top surface and spaced apart along the length, strings arranged above the top surface across the width, and recesses formed into the fretboard between the frets and below the strings, wherein the recesses include a cavity and a peripheral slot in communication with the cavity;
a button is carried in each recess for reciprocal movement between a raised position and a depressed position, the button having a body and a finger extending from the body, wherein the button has a hole formed transversely through the button, and one of the strings is passed through the hole;
in the depressed position, the button is in contact with the one of the strings and depresses the one of the strings against a proximate fret;
in the raised position, the button is out of contact with the one of the strings; and
the body of the button is received in the cavity, the finger of the button is received in the slot, and the slot limits movement of the button in directions other than along the axis during movement between the depressed and raised positions.

### Claim 14 (depends on 13)

The assembly of claim 13, wherein the button is biased toward the raised position.

### Claim 15 (depends on 13)

The assembly of claim 13, wherein:
the button has a top and a bottom, and a post projecting from the bottom; and
a spring is captured on the post and disposed in the recess between a bottom of the recess and the bottom of the button.

### Claim 16 (depends on 13)

The assembly of claim 13, wherein the hole has a cylindrical inner surface.

### Claim 17 (depends on 13)

The assembly of claim 13, wherein the hole has a quasi-cylindrical inner surface and a flat upper surface.