US1191674A - Method of construction of talking-machines. - Google Patents

Description

P. B. DELANY.

METHOD OF CONSTRUCTION OF TALKING MACHINES.

APPLICATION FILED OCT. 21. I914.

Patented July 18, 1916.

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Originalepplication filedJuly 19, 1913, Serial No. 779,947.

PATRICK B. DELANY, OF SOUTH ORANGE, NEVJ JERSEY.

METI-I OD 015 CONSTRUCTION OF TALKING-MACHINES.

Specification of Letters Patent.

PatentediJuly 18, 1916.

Divided and this application filed October 21,

1914. Serial No. 867,709.

To all whom it may concern:

Be it known that I, PATRICK B. DELANY, a citizen. of the United States, residing at South Orange, county of Essex, State of New Jersey, have invented a certain new and useful Method of Construction of Talking- Machines, of. which the following is a specification.

This invention relates to improved methods of phonograph construction andforms a divisionalapplication from my co-pending application Serial No. 779,947 filed July 19, 1913, and also in pa t a continuation of my prior application No. 739,939, filed J an. 3, 1913.

The invention is designed to eliminate scratching orv scraping noise from the record and to improve the quality of recordations and reproductions. It is well known that even the smoothest surface revolving under the needle will produce quite a loud or observable noise emitted by the horn or amplifier. It has been found that this is largely due-to the method of construction in which a metallic vibrating arm connects the record andthe diaphragm of the sound box. Other methods employing vibrating arms of wood,

bone or other hard substance also produce the same effect to a modified degree. It has been sought to remedy such defect by rubber or other vibration deadening material interposed at' the point of contact between the vibrating arm andv the diaphragm; but on account of the elasticity of such materials, or for other reasons, the tone of reproduction has been greatly lowered and modified and, owing to the instability of such materials, particularly under pressure, the instruments soon become out of order.

I have devised a method of mounting the arm whereby metallic connection between therecord and diaphragm is entirely severed without appreciable loss of force but with marked suppression of the objectionable scraping sound, the result being apure and faithful reproduction.

The object of this invention is attained by a method of mounting the arm in cells,

one cell being interposed between the arm and its support and another cell interposed between the arm and the diaphragm, the cells being then filled with a mass of material of suitable density and stability to carry the major or sound producing Vibrations, and yet of such character as to suppress or eliminate objectionable extraneous, incidental and minor vibrations that produce the extraneous or scraping sounds in the tones produced by the diaphragm. The material of such mass may be a single material or a compound material composed, for instance, of rubber, asphaltum, tar, waxes of various kinds, etc, or compounds of any two or more of such simple materials.

The invention further comprises features hereinafter set forth.

The drawing is an elevation partly in section of a device constructed in accordance with my improved method.

1 indicates the sound box, 2 the diaphragm, 3 the vibrating arm, l the needle holder, and and-4 the needle.

On each side of the diaphragm is a circu lar gasket 12. These gaskets and-the pcriphery of the diaphragm are securely hold in the sound box by a meltable mass 16, which also firmly cements the gaskets to the diaphragm. In mounting the diaphragm, it is arranged with one or more retaining gaskets in the sound box and the gaskets and diaphragm are fastened to the sound box by the lneltablc mass while the latter is in a heated plastic condition. When the mass cools it hardens and the diaphragm and gaskets are securely held in place but the diaphragm is insulated from the sound box.

The arm has a lateral bar or rod 5 with a cross-head thereon adapted to be seated in, embedded or surrounded by a mass 8 of material, such generally as hereinbef'ore described, that absorbs, eliminates or suppresses secondary or minor objectionable vibrations, and is contained in a cell or container 7- attached to or integral with an extension from the sound box. Such a method of mounting the vibrating arm is disclosed in my application Serial No. 700,394, filed May 29, 1912. The upper portion of the vibrating arm is divided transversely. The end portion 9 is attached to the diaphragm in any ordinary or suitable way and the adjacent ends of the arm are mechanically united by means of a mass or compound 11 that fills a cell or container 10 carried by the end portion 9 of the arm and in which the adjacent portion of the vibrating arm is embedded. Interruption of the continuity of the arm by a body of material acting to suppress or eliminate minor undesirable vibrations therein affords marked improvement in character or quality and purity of tone.

The material, mass or compound used in the practice of this invention is by preference one that becomes soft and even viscous or semi-liquid under the influence of a suitable degree of heat and which at ordinary temperaturesroom temperaturebecomes and remains hard, meaning by that suflieiently rigid or stable to follow the primary vibrations of the arm. This arrangement permits of firm attachment of the inner section of the arm to the diaphragm, and, what is of great importance, while said mass is yet in a plastic state in the process of cooling or setting, the part attached to the diaphragm and the part attached to the sup port are allowed to assume positions in the connecting masses controlled by the normal position of the diaphragm in its mounting and of the support in its anchorage so that there is no warped or biased strain, a condition practically unavoidable in prior methods of construction and mounting. If, when the different parts are connected, or upon completion of the difl erent mountings, the sound box as a. whole be placed for a short time in a temperature suflicient to soften the mass in which the diaphragm and the gaskets are held and which fills the recessed portion of the case or cell, and also the mass in the container in which the arm support is anchored, and the mass in the container comprising the coupling of the parts of the arm, all the parts will yield to a position of unbiased coordination and establish a true and highly sensitive vibrating system. This equalization of strain between the various parts permitting them to assume normal unrestrained positions under action of heat forms an important feature of my method of construction.

It is obvious that under ordinary mechani cal skill changes could be made without departing from the spirit and scope of the invention. I therefore do not limit myself to the particular structure shown, which discloses only one of the many structures with which my invention may be carried out. In

my copending application for Patent No. 867,710 filed simultaneously herewith I have shown and claimed certain features of the invention which are herein shown but not claimed.

In my copending application No. 779,947 filed July 19, 1913 and No. 867,710 filed Oct. 21, 1911, I have claimed certain subject matter shown in this application but not claimed herein.

No claim is made herein to the apparatus herein shown and described as such subject matter is claimed in my copending application for Patent No. 867,710, filed Oct. 21, 191 1.

I claim 1. The method herein described of connecting parts of the reproducing mechanism of a talking machine, which consists in applying to the juncture of the diaphragm and soun box and to the juncture of metallically unconnected sections of the stylus arm ad'acent the diaphragm, masses of a suita 1e meltable material inert to vibrations and subjecting the assembled parts to heat, whereby the parts assume normal positions relatively to one another and are so permanently held upon the cooling of the connecting masses.

The method herein described of connectin parts of the reproducing mechanism of a talking machine which consists in applying to the juncture of the diaphragm and sound box, of the stylus arm support and the sound box and of the metallically unconnected sections of the stylus arm adjacent the diaphragm, masses of a suitable meltable material inert to vibrations and subjecting the assembled parts to heat, whereby the parts assume normal positions relatively to one another and are so permanently held upon the cooling of the connecting masses.

The method herein described of connecting parts of the reproducing mechanism of a talking machine which consists in applying to the juncture of the metallically unconnected sections of the stylus arm adjacent the diaphragm and of the arm support and sound box masses of a meltable plastic material inert to vibrations and subjecting the assembled parts to heat for the adjustment of the parts in operative positions.

41. The method herein described of connecting parts of the reproducing mechanism of a talking machine, which consists in applying to the juncture of the diaphragm and the sound-box and to the juncture of the stylus arm and its holder masses of a suitable meltable material inert to vibrations, allowing said masses to harden and then heating the material. to a suiiicient degree to allow the diaphragm and stylus arm to relax and find neutral or equalized positions.

5. The method herein described of mounting a vibratory diaphragm Which consists 5 in arranging the diaphragm With a retaining gasket in a supporting frame and in fastening the diaphragm to the gasket and to the frame by a meltable mass While in a heated plastic condition but Which hardens on cooling. 10

In testimony whereof, I have hereunto subscribed my name.

PATRICK B. DELANY. lVitnesses:

ANNIE M. DELANY, LAURISTON BUNKER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, I). C.

It is hereby certified that in Letters Patent No. 1,191,674, granted July 18, 1916, upon the application of Patrick 13. Delany, of South Orange, New Jersey, for an im rovement in Methods of Construction of 'lalkine-Machines errors a car in the printed specification requiring correction as follows; Page 2, strike out the paragraph contained in lines 6943; same page, line 116, claim 3, after the Word operative insert the Word normal; and that the said Letters Patent should be read with these corrections therein that the same may conform to the record of th case in the Patent Office.

Signed and sealed this 28th day of November, A. D., 1916.

[SEAL] F. W. H. CLAY,

Acting (Jammz'ssioner of Patents. Cl. 274-35.

Corrections in Letters Patent No. 1,191,67

Corrections in Letters Patent No. 1,191,674.

It is hereby certified that in Letters Patent No. 1,191,674, granted July 18, 1916, upon the application of Patrick B. Delany, of South Orange, New Jersey, for an improvement in Methods of Construction of Talking-Machines,errors appear in the printed specification requiring correction as follows: Pagev 2, strike out the paragraph contained vin lines 69-73; same page, line 116, claim 3, after the word operative insert the Word normal; and that Signed and sealed this 28th day of November, A. D., 1916.

" i F. W. H. CLAY,

Acting Commissioner of Patents.

[SEAL]

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