US972003A - Horn. - Google Patents

Description

E. A` LBET.

HORN.

APPLICATION FILED JAN.4, 1910.

Patented 0013.4, 1910.

UNiLTnD sTATnS EDWARD A. LEE'I, 0F NEW YORK, N. Y.

HORN.

Specification of Letters iPatent.

Patented Oct. 4, 19ML Application filed January 4, 1910. Serial No. 536,277.

It'o al whom it may concern:

le it known that I, EDWARD A. LnET, a citizen ot' the United States, residing in the borough of Manhattan, city, county, and State of New York, have invented certain new and useful improvements in Horns, of which the following is a. specification.

My improvements relate to the configuration of sound transmitting horns and are applicable to various uses, particularly for use in connection with phonographs, grainophones and similar instruments, and are designed to obviate iutert'iirenee and harshness, and to modulate and blend the various notes and tones in transit.

The invention consists in the specific constructioir and arrangement otl parts shown, described and claimed, distinguishing features being a concave dellecting surface which is essentially a quadrantal segment-in central .longitudinal section, situated obliquely opposite the inlet passage with the' axial line of the latter `in coincidence with the center oiLl said detlecting surface; and in a modulating chamber situated back of and coinciding with said concave detlecting sui'- face, substantially 'as hereinafter set forth, said modulating chamber being formed with one (n more openings through the anterior dctlcctiug surface which perform the saine function that the nasal passages do for the human throat by increasing resonance and relieving and oliviatiug all tendency to muttle the sund.l ln tact the modulating chainber and its openings through the anterior defiecting surface may be likened to the nasal cavities in that they. increase resonance while rendering the timbre more clear and distinct, at the saine time neutralizing and eounteracting stiffness and harshness emanating from the metallic diaphragm of a phonograph or otliei' source ot' sound vibiation.

In the accompanying drawings, Figure l, is a side elevation of a horn embodying my invention; Fig. 2, a central vertical section thereof. Fig. 3, is a section on plane of line 3-3-Fig. 2; Fig. 4', a diagram illustrating a modification. ,I

As before intimated myinvention is applicableio sound transmitting horns for numerous purposes, and l do not limit myself in this respect although I have herein for vconvenience of illustration, shown it as adapted to a gramophoue or phonograph horn.

lVliat I designate as the concave defiecting surface (l, forn'iing the upper hack port-ion lof the horn is et' peculiar coi'istruction in i that in central longitudinal sectioii,as shown in Fig. 2, it presents a quadrantal segment of a circle, disposed diagonally opposite the inlet i', the longitudinal axial line i', of whichl coincides with the center d', of the segment el.

l have found by investigation and experi? nient that this configuration and arrangement of detiecting surface with relation to the inlet ailords the best practical results, the interference or confusion of sounds and tones being reduced to the minimum, and the transmission being clear and 'distinct. y

I still further improve the quality ot' tone and render it more natural' and uniform by the use of a modulating chamber m, behind the concave deflecting surface (l, thereby eliminating the hard and harsh metallic sound emanating from the diaphragm when the horn is-used on a phonograph, for instance, and hence eliminating one of the principal objections to the use of such instruments.

One or more openings cl2, may be made through the anterior detleetiiig surface (Z, into the modulating chamber m, thereby increasing the. resonance, as well as the clearness and softness of timbre, and rendering the device analogous to the human throat and nasal cavities in the control and modulation of the sound vibrations received through the inlet passage z'.

In fact by the use of my improved horn I attain a full clear volume of sound in which the various notes are blended hai`- moiiiously, and in which hard metallic sounds are modulated and neutralized.

vWhat l claiin as my invention and desire to secure by Letters Patent is,

A horn for transmitting sound Vibrations formed with a concave deflecting surface disposed diagonally o posite the inlet, said concave deflectiner sur ace presenting in cen--l tral longitudinal n ection a quadrantal 'seg- Cil opening into the modulating chamber on each side of the axial line of the inlet passage, for the purpose described.

4 1 EDWARD A. LEET. Witnesses i D.l W. GARDNER, GEO. WM; MIAT;

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