US1391425A - Phonograph-needle and resonator therefor - Google Patents

Description

R. STEINERT.

PHONOGRAPH NEEDLE AND RESONATOR THEREEOR.'

APPLICATIQN FILED OCT. 25,1919- Patented Sept. 20, 1921.

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UNITED STATES PATENT OFFICE.

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PHON'OGRAPH-NEEDLE AND RESONATOR- THEREFOR- Specification ofLetters Patent. Patented Sept. 20, 1921.

Application filed October 25, 1919. Serial No. 333,286.

To all whom it may concem:

Be it known that I, RUDOLPH STEINERT, .a citizen of the United States, residing at New Haven, in the county of New Haven and State of Connecticut, have invented new and useful Improvements in Phonograph- Needles and Resonators Therefor, of which v crepitations so often found in using the ordinary needle, and which materiallydetract from the proper rendition of music, are practically done awa with or so modified as to,eliminate any disagreeable results.

' A further object of my invention is to so arrange the resonator relative to'the stylus as that it is held in properposition with respect to the inclined needle, so that 'it may be utilized with reproducing mechanisms now in use without the need of specially designed parts. v

I accomplish the objects aimed at by providing a resonator, preferabl formed as a thin metal shell, so shaped an disposed with I respect to the stylus as that it gives .the greatest amplitude of sound and clearness in reproduction, without in any way interfering with the tracking of the oint over the record or with the insertion oi the needle in the holder of the usual reproducing apparatus to which it is applied. I

In order that the invention may be clear to those skilled in the art, I- have, in the accompanying drawings, shown; two embodiments of my invention, but these embodiments are, it is to be noted, illustrative and in no-sense restrictive, as the invention may be embodied in other physical forms without de arting from my invention.

In the drawings 'Figure 1 is a view in side elevation of a resonator and needle made inv accordance with my invention, the. reproducing apparatus being conventionally shown.

Fig. 2 is .a sectional view of the resonator and needle.

wardly from the hood or dome 13.

soundcollecting edge is,

Fig. 5 is a viewof a reproducing apparatus conventionally shown, with the resonator attached to the needle holder.

Referring to the drawings by numbers, like numbers indicating like parts in the several views, 10 indicates the needle, which is made up of the stylus 11, of any desired type or form, and the resonator 12, Which, as shown, consists of the bell-shaped or dome-like hood 13, preferably, asshown in Fig. 4, of general elliptical form in plan, and having its lower edge 14 flared out- The stylus 11 passes through the top of the dome 13 man inclined direction and in line with the major longitudinal axis of the resonator, so as to bring the active point of the stylus substantially centrally of the mouth of the resonator and projecting below the lower flared edge 14 thereof a suflicie'nt distance to permit the point of the stylus 11 to engage the groove in the record, and, when the needle is in the socket of the needle holder, to maintain the lower edge of the resonator close and parallel to the plane of,

the surface of the record. The needle 11 -will be fixed in any suitable manner, as by compression of the resonator aboutit so as to maintain the parts in a state of relative ri 'dity.

t 'will be observed that the dome 13 is asymmetrical or distorted relative to the hell mouth, Being preferably inclined from the perpendicular 1n the line of the major longitudinal axis of the elliptical mouth so as to throw the to of the dome to one side of a line perpendicular to the base. This gives a structure in which needle-inclination necessary for fixing the needle in the usual reproducer is secured, and at the same time a central positioning of the point of the stylus relative to the mouth of the resonator is maintained Arranged n. this manner, the needle is free to vibrate under the irregularities of the groove, and the vibrations are, according to my present theory, concentrated and condensed by the resonator and transmitted to the needle in full amplitude, so as to clarify and intensify the sound and eliminate the false tones' which result from the use of a bare needle.

The.dome-like resonator with its 'flared it will be observed, in rigid relation to the needle, both in the form of the invention just described, and in that modification shown in Fig. 5,.pre'sently to be described, so that vibratlons are, by

such resonator element, transmitted to the It will be understood, of course, that such changes as. are within the scope of mechanical skill may be made without departingfrom the spirit of my invention.

I claim 1. In adevice of the class described, the combination of a hollow,'substantially domeshaped member; and a needle passing through the top of and traversing said member in a direction inclined to the perpendicular. f

2. In a device'of the class described, the combination of a hollow, dome-shaped member; anda needle passing through the top of said member and in a direction .inclined to the perpendicular.

3. In a' device of the class described, the combination of a hollow, dome-shaped member the top of which is distorted from the perpendicular; and a needle passing through a hollow, dome-shaped member having an open lower end; and' a needle -passing through the top of and traversing said member in a direction inclined to the perpendicular and with its record-engaging end disposed substantially centrally of said open lower end.

6. A stylus for phonographs comprising a hollow, dome-shaped member having a substantially elliptical, open, lower end; and a needle passing through the top of and traversing said member in a direction inclined to the perpendicular and with its record engaging end disposed substantially centrally of said open lower end.

7 A stylus for phonographs comprising a hollow, dome-shaped member having its top distorted from the perpendicular and a substantially elliptical, open, lower end; and a needle passing through the top of said member in a direction inclined to the perpendicw lar and with .its record-engaging end disposed substantially centrally of said open lower end.

In testimony whereof I have hereunto. set

my hand.

. RUDOLPH STEINERT.

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