US199516A

US199516A - Improvement in cornets

Info

Publication number: US199516A
Authority: US
Publication date: 1878-01-22
Anticipated expiration: 1895-01-22

Description

' 3 Sheets-Sheet 1.v G. G. CONN & E. DUPONT,

' Cornet. No. 199,516. Patented Ja n; 22,1878.

3 Sheets-Sheet 2. O. G. CONN 8v E. DUPONT.

Cornet.

No. 199,516. Patented Jan. 22,1878.

null-nu WITNESSES PQPETERS, FHOTOUTHOGRAPHER, WASHRQGTQH, D

3 SheetsSheet 3.

0; G. CONN & E. DUPONT. Cornet. No. 199,516. Patented Jan.- 22, 1878.

( f if) Mag Rs additional piping.

UNITED STATES-PATENT OFFICE.

CHARLES G. CONN AND EUGENE DUPONT, OF ELKHART, INDIANA.

IMPROVEMENT IN CORNETS.

Specification forming part of Letters Patent No. 199,516, dated January 22, 1878; application filed January 17, 1877.

To all whom it may concern:

Be it known that we. CHARLES Gr. CONN and EUGENE DUPONT, both of Elkhart, in the county of Elkhart and State of Indiana, have invented certain new and useful Improvein ent-s in Cornets and other lVind Instruments, of which the following is a specification:

e construct a cornet or other slidin g-valve instrument so that it may be changed from a higher to a lower key by the introduction of To this end we employ valve-slides of such length that they may be drawn out to the'necessary extent when the main piping is increased, and to compensate for the length which is added to the valveslides to admit of drawing them out, as aforesaid, we apply to the valves bends corresponding in length to the added length of the valveslides, which bends form parts of the windpassage when open tones are produced, and are closed by the depression of the valves to produce valve tones.

The invention further relates to the use of graduated valve-slides, in combination with the aforesaid compensating-bends, as hereinafter described.

The objects of our invention are to provide a cornet or other wind-instrument which may be adapted to play in different keys at the will of the performer; and, further, to construct a cornet or other analogous instrument which will produce open tones and valve tones of the same quantity and quality by avoiding a change in the direction of the air-current when the valve tone is substituted for the open tone.

In the accompanying drawing, Figure l is an elevation of the front side of a cornet illustrating our invention, with the slides extended and a long crook applied, also showing detached views of other crooks employed for changing the key. Fig. 2 is an elevation of the working parts thereof with the slides in. Fig. 3 is an elevation of the rear side. Fig. 4 is a horizontal section, looking upward, on the line 4c 4., Fig. 2. Fig. 5 is a detached view of the several valves, illustrating the course of the air-current when open tones are produced.

For the purpose of illustration, we shall describe our invention as used in connection with a comet in which the air from the mouth-piece and pipe passes first through the third or farthest valve, then through the first valve, and lastly through the middle or second valve, and thence to the bell. In this case the air enters the portion of the instrument shown at a, and leaves it at 2, as indicated by the arrows.

\Vhen the valves are up open tones are produced, and when the valves are down valve tones. The air-current, when the tone is open, passes into and through the third valve A, into the compensating-bend B, from this again into and through the lower part of the valve A to a connecting-pipe, O, which conducts it to the first valve, 1), thence through the first valve and the compensating-bend E of the same, again through the upper portion of the first valve, thence through the connecting-pipe F into and through the second valve, G, thence through the compensating-bend H thereof, again through the second valve, Gr, and thence through the curved pipe I to the bell of the instrument.

\Vhen either valve is depressed the coinpensating-bend belonging thereto is closed by the said valve, so that the air-current does not pass into the compensating-bend, but into the valve-slide proper, K, L, or M, as the case may be. It will thus appear that the passage of the air-current for the valve tones is the same as that already described in relation to the open tones, except that it does not enter the compensating-bends, which are cut off by the valves, but passes through the valveslides proper instead.

The valve-slides are constructed of an additional length to make up for the use of the compensating-bends. This enables us to tune the instrument in different keys. The adjustment of the valve-slides is indicated by graduated scales thereon, as shown at 1 2 3 in Fig. 1, which shows the adjustable portions of the valve-slides extended.

The disposition of the wind-passages can be altered to suit the fancy or preference of the The connections of the valves need maker. not be the same as we have described. e prefer at present to connect the first valve with the third vclve, and the second valve with the first valve, as we think this the best disposition of the wind-passages.

The compensating-bend is not used to change the horn in different keys; but it is used for the purpose of allowing us to add to the length of the valve-slides, that we may draw them to suflicient length to put the instrument in perfeet tune when the pitch of the instrument is lowered by additional length of pipe. We lower the pitch of our cornets by substituting longer crooks in the mouth-pipe of the main instrument. Our principle is this: We'first build a comet in E-flat, which may be lowered pitch. This bend on the valves is a part of the body of the instrument when the open tone is used, but is cut off and its equivalent transferred to the valve-slides when the valve tones are produced.

Thisconstruction enables us to use a lighter piston, and to make a perfectly free and clear bore through the pistons with a much shorter stroke or action. By the use of the additional pipe to the valve-slides proper we can set the instrument in different keys and tune the valve tones perfectly with the open tones. The direction of the air-current is not changed when the valve tone is substituted for the open tone. Hence we have both valve and open tones of the same quantity and quality.

. The division of the holes in our register- Having thus described our invention, the

following is what we claim as new and desire to secure by Letters Patent:

1. The combination of a compensating-bend with the valve of a comet or other wind-instrument, arranged so as to be closed by the depression of the valve to produce a valve tone, as and for the purpose herein set forth.

2. The valve-slides graduated for adjustment, as herein described.

3. The combination of the valves, the compensating-bends, and the graduated valveslides, asand for the purpose set forth.

4. A cornet or other wind-instrument constructed with a compensating-bend connected with the valve and arranged to be closed thereby when a valve tone is produced, and with avalve-slide of correspondingly-increased length to admit of drawing the said slide out when the instrument is changed from a higher to a lower key by the introduction of an additional len gth of pipe, substantially as described. 7 p CHARLES G. CONN. EUGENE DUPONT.

Witnesses:

E. O. BICKEL, J. T. G. WARD.