US867836A - Trumpet or horn of sound-reproducing instruments. - Google Patents

Description

No. 867,836. PATENTED OCT. 8, 1907.

R. REVELL.

TRUMPET OR HORN OF SOUND REPRODUGING INSTRUMENTS.

APPLICATION FILED JULY 21, 1906.

WITNESSES INVENTOR W M RMMW ATTORNEYS UNITED STATES PATENT OFFICE.

ROLAND REVELL, OF WEST HAHPSTEAD, LONDON, ENGLAND, ASS'IGNOR- TO THOMAS KNIGHT BARNARD, OF STROUI), ENGLAND.

Specification of Letters Patent.

Patented Oct. 8, 1907..

Application filed July 21, 1906. Serial No. 327,233.

To all whom it may concern:

Be it known that I, ROLAND REVELL, a subject of the King oi- Great Britain and Ireland, residing at Shirland Lodge, Goldhurst Terrace, West Hampstead, in the county of London, England, composer of music, have invented certain new and useful Improvements in Connection with the Trumpets or Horns of Sound- Reproducing Instruments, of which the following is a specification.

This invention relates to horns for sound reproducing instruments, and particularly to deflectors for such horns.

The object of my invention is to provide a satisfactory deflector which may beattached at the mouth of the horn and is so constructed as to afford an annular aperture through which the sound issuing from the horn is deflected practically horizontally in all directions at once. In connection with the deflector, I prefer to add also a sounding board which may, for effect, he perforated. I

In the accompanying drawings Figure 1 is a vertical section of a horn provided with my deflector with its accessory sounding board; Fig. 2 is a vertical section of.a horn showing my deflector without a sounding board; F ig. 3 is a vertical section of a modified form of my deflector; while Fig.- 4 is a vertical section of the same, provided with a sounding board.

At present the full power of sound from sound reproducing instruments is only heard when a person is in front of the trumpet, or horn, the sound waves being driven almost in a direct line, or only radiating to a limited extent, the result being that, if a sound reproducing instrument employing a trumpet or horn to increase the volume of sound, be played in a room, and the person listening to the sound be directly in front of the trumpet, or horn, the power or blast from the 'trumpet or horn is generally too great to be pleasant, and if a person be behind, or atthe side of, the trumpet or horn, that person does not hear the full effect of the instrument, in consequence of the sound waves being driven forward from the front or bell of the trumpet or born. The consequence is the volnine of tone is very unequally distributed about the room. My deflector distributes the sound waves from such instruments more equally and also, to a great extent, prevents the unpleasant blast which now exists with the ordinary trumpet or horn.

Referring to the drawings, it will be seen that I insert or mount inside or over, or both inside and over, the mouth or hell of the trumpet or horn 1, a bell-shaped cone or other deflector 2, so as to leave an annular space for the passage of sound waves. The said bell-shaped cone, or deflector, can be held in position in or on the trumpet or horn by stays 3, or

other suitable means, which will prevent it from entering too far into, or will support it above, the mouth of the trumpet or horn. The effect of the said cone or deflector is to cause the sound waves to pass equally through the said annular passage and so be better distributed.

Instead of fitting the trumpet or horn to the sound reproducing instrument in a more or less horizontal position, as has been hitherto customary, I prefer to arrange the said trumpet or horn, in a vertical or nearly vertical, position, with the opening of the bell orlarge end of the trumpet or horn directed upwards.

The cone or deflector may be solid, or it may be hollow, and it may be constructed of any suitable material, such for example as metal, wood, celluloid,- or the like. If it be made hollow, it may be provided with an opening, or openings 4, and then it will form a sound chamber, or act as a soundboard, and improve, or modify, the sound.

In Fig. 2 I have shown a trumpet or horn made with a horizontally extended lip 5 upon which the struts 3 support the deflector 2, which is made with a small conical central part directed downwards at the mouth of the trumpet, or horn l, the outer part of the deflector extending parallel with the lip. 5.

The same trumpet or horn can, if desired, be used in recording, or an ordinary trumpet or horn may be used for that purpose.

, I claim as my invention 1. In combination with the trumpet or horn of a sound reproducing-instrument, a sound deflector arranged at the mouth of the horn and secured to the latter and providing an annular aperture through which the sound is projected in all directions simultaneously in a plane practically at right angles to that at which it would normally issue from the born.

2. In combination with the trumpet or horn of sound reproducing instruments, a sound deflector arranged at the mouth of the horn and secured to the latter and providing an annular aperture through which the sound is projected practically horizontally in all directions simultaneously.

3. In combination with the trumpet or horn for sound reproducing instruments arranged to discharge the sound in an approximately vertical direction, a sound deflector arranged at the mouth of the horn and secured to the latter and providing an annular aperture through which the sound is projected practically horizontally in all directions simultaneously.

4. In combination with the trumpet or horn of sound reproducing instruments, a sound deflector arranged at the mouth of the horn and secured to the latter and providing an annular aperture through which the sound is projected in all directions simultaneously in a plane practically at right angles to that at which it would normally issue from the horn, and a sounding board coiiperating with said deflector.

5. In combination with the trumpet or horn 01' sound reproducing instruments, a sound deflector arranged at the mouth of the horn and secured to the latter and providing an annular aperture through which the sound is projected in all directions simultaneously in a plane practically at right angles to that at which it would normally issue from the 'horn, and a perforated sounding board cooperating with said deflector.

6. In combination with the trumpet or horn of a sound reproducing instrument having a flared lip; a sound deflector arranged at the mouth of the horn and haying its 1 deflecting surface substantially parallel to the lip of the 10 horn, and providing in connection therewith an annular aperture through which the sound is projected in all di rectio'ns simultaneously in a plane practically atjright angles to that at which it would normally issue from the signed this specification in 15

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