# US 7,608,767 B1 · Dual use trombone

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- Number: US 7,608,767 B1
- Document ID: US7608767B1
- Status: Granted
- Kind: B1
- Application number: 12/156,044
- Filed: 2008-05-29
- Granted: 2009-10-27
- Earliest claimed: 2008-05-29
- Assignees: Gemeinhardt Company LLC
- Inventors: Richard G. Barth
- Web page: https://patentgrep.com/patent/US7608767B1

## CPC

- G10D 7/10: Lip-reed wind instruments, i.e. using the vibration of the musician's lips, e.g. cornets, trumpets, trombones or French horns
- G10D 9/03: Cupped mouthpieces
- 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

In a large bore symphony tenor trombone having a detachable and interchangeable bass mouthpipe, the improvement comprising, interchanging the bass mouthpipe with a tenor mouthpipe that will accommodate a tenor shank mouthpiece at its proximate end and that tapers from its proximate end to its distal end to the straight bore dimension of the large bore symphony tenor trombone, whereby an acoustically shaped air column is created between a tenor shank mouthpiece and the straight bore dimension of the large bore symphony tenor trombone, and whereby the tenor mouthpipe changes the acoustical and playing characteristics of the large bore symphony tenor trombone to those of a small bore tenor trombone.

## Claims

### Claim 1

In a large bore symphony tenor trombone having a detachable and interchangeable bass mouthpipe, the improvement comprising,
interchanging the bass mouthpipe with a tenor mouthpipe that will accommodate a tenor shank mouthpiece at its proximate end and that tapers from its proximate end to its distal end to the straight bore dimension of the large bore symphony tenor trombone, whereby an acoustically shaped air column is created between a tenor shank mouthpiece and the straight bore dimension of the large bore symphony tenor trombone, and whereby the tenor mouthpipe changes the acoustical and playing characteristics of the large bore symphony tenor trombone to those of a small bore tenor trombone.

### Claim 2 (depends on 1)

The improvement of claim 1, wherein the length of the tapered tenor mouthpipe from its distal to its proximate end is from 10 to 28 inches.

### Claim 3 (depends on 2)

The improvement of claim 2, wherein the rate of taper of the tenor shank mouthpipe from its proximate to distal end is about 0.010 inches of taper per inch.

### Claim 4

A dual use large bore symphony tenor trombone, comprising,
a large bore symphony tenor trombone having a detachable and interchangeable bass mouthpipe that receives a bass shank mouth piece at its proximate end, and
a detachable and interchangeable tenor mouthpipe that receives a tenor shank mouth piece at its proximate end, and that tapers from its proximate end to its distal end to the straight bore dimension of the large bore symphony tenor trombone, whereby an acoustically shaped air column is created between a tenor shank mouthpiece and the straight bore dimension of the large bore symphony tenor trombone, and whereby the tenor mouthpipe changes the acoustical and playing characteristics of the large bore symphony tenor trombone to those of a small bore tenor trombone.