US663011A - Horn for use on talking-machines. - Google Patents

Description

Patantad v Dec. 4, I900.

J. n. QHALLEN, m.

HORN FOR USE ON TALKING MACHINES.

(Application fllod Juno 7, 1900.)

(No Model.)

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UNITED STATES HFFICE.

PATENT HORN FOR USE ON TALKING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 663,011, dated December 4:, Application filed June '7, 1900. Serial No. 19,361. lllo model.)

To all whom it may concern Be it known that 1, JAMES R. CHALLEN, Jr., acitizen of the United States, residing in Newark, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Horns for Receiving and Delivering Sound; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters of reference marked thereon, which form a part of this specification.

My invention relates to improvements in horns for use in receiving and concentrating sound and for delivering and amplifying sound, and is particularly applicable to recording and reproducing horns on talkingmachines.

The object of my invention is the controlling of sound-waves by means of a concentric spiral spine or rib which projects from the inside of the recording-horn and extends spirally from the smaller to the larger end thereof. By this device the direct sound-waves are caught at the orifice of the horn and instead of being deflected by the internal surface of the same at the usual angles which govern sound-Waves the sound-waves are given a circular or spiral direction, being deflected by the incline of the spiral, and strike the diaphragm with a concentrated force. Furthermore, it appears that the projecting spiral rib by controlling the sound-waves also eradicates the tendency to produce overtones and causes the material of which the recordinghorn is made to vibrate, and thus reinforces the volume of sound.

The horn for delivering and amplifying sound is dependent upon exactly the same feature for its improved action-that is to say, when in use upon a talking-machine the sound-waves leave the diaphragm and strike the spiral-rib which projects from the inside of the horn, thereby giving it direction and causing the entire horn to vibrate, thus greatly increasing the volume of the reproduction and making it clear and natural.

In the accompanying drawings, Figure 1 is a longitudinal view of a horn, in which my improvement is shown in dotted lines. Fig.

2 is a sectional view of a horn cut through on the lines 03 w in Fig. 1; and Fig. 3 is an end view of a horn, showing my concentric spiral improvement.

In describing myimprovement I shall call attention to the accompanying drawings, where like letters of reference indicate corresponding parts in the differentviews of the same.

A indicates the horn. The material of which it is made is not essential to specify, inasmuch as different materials can be used to advantage. B is a concentric spiral rib attached to the inner walls thereof and extending from the smaller to the larger end and increasing in width proportionately to the increase in diameter of the horn and inclined at an angle toward the smaller end. The rib B might be made of uniform width throughout its length and inclined at any angle without departing from the spirit of my invention.

The horn, with its concentric spiral rib B, is preferably made of brass, although it is evident that other well-known materials, such as papier-mach, metal, celluloid, 6170., might be substituted.

I have specified that the invention is particularly applicable to talking-machines, and it will therefore be obvious that this device is applicable to any instrument in which sound is received or delivered, so as to concentrate or amplify the sound.

It will of course be very evident in reviewing the very simple means used in my invention that in View of the very simple elements combined for the above-stated purpose I cannot and will not positively tie myself down to having the spiral rib attached on the inside of the horn, inasmuch as the spiral flange, as it might also be called, could in some suitable mechanical manner so pierce the side of the horn as to appear on the outside. The scientific reasons for that idea I cannot at the present time state, confining myself merely to suggesting that from a mechanical material point of view such a construction is possible. I furthermore do not limit myself to any definite shape of the horn, as the inventive merit of my sound theory as stated in my preamble will hold good just as well with a horn that is curved as with one that is shown straight, as in the drawings.

What I consequently claim in accordance with the above description, and desire to secure protection for by Letters Patent, is, broadly 1. The combination with a horn-shaped device for receiving and concentrating sound, of a concentric spiral rib or flange attached to the inner Walls thereof extending from the larger to the smaller diameters thereof, substantially as described.

2. The combination with a sound-horn of a concentric spiral rib or flange attached to the inner Walls thereof, extending from the smaller to the larger diameters of the said horn for the purposes described.

8. The combination with a sound-horn, of a concentric spiral rib or flange attached to the inner Walls thereof, extending from the smaller to the larger end and increasing in width proportionately to the smaller and larger diameters of the said horn, substantially as and for the purposes described.

4. In a horn for delivering and amplifying sound, a concentric spiral rib or flange attached to the inner walls thereof, and extending from the smaller to the larger end, increasing in Width proportionately to the increase in diameter of the horn and inclined at an angle toward the smaller end, substantially as described and for the purposes set forth.

5. The combination in a recording and reproducing sound-horn for phonetic purposes, of a concentric spiral rib or flange attached to the inner Walls thereof, said flange increasing in width proportionately With the minimum and maximum diameters of the horn, and inclined at an angle toward the sides of the said horn, substantially as and for the purposes described.

In testimony that I claim the foregoing I have hereunto set my hand this 2d day of June, A. D. 1900.

JAMES It. CHALLEN, JR.

\Vitnesses:

FREDK. O. FISCHER, HARRY G. WALTERS.

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