US1188509A - Stylus-lever for phonograph sound-boxes. - Google Patents

Description

H. TEICHLAUF. STYLUS LEVER FOR PHGNOGRAPH SOUND BOXES. APPLICATION F ILED JULY I3. I915 1,188,509. PdtentedJun-W, 1916.

:eN- nsmms "rarnn'r rriciE HARRY TEICHLAUF, or NEW YORK, n. Y. j

of the city of New York, borough' of Brook-,

lyn, in the county of Kings and State-o New York, have invented a new and Ira-- proved Stylus-Lever for Phonograph Sound- Boxes, of which the following is a full, clear,

and exact description. Y r

This invention relates to sound boxes for phonographs and has to deal more particu larly with the stylus lever and mounting therefor.

The invention has for its general objects to improve the construction of devices of the characterreferred to so as to be reliable and eflicient in use, comparatively inexpensive to manufacture, and so designed that the recording and reproduction of sounds is materially improved. A more specific object of the invention is the provision of a stylus'lever which has a longitudinally divided or V -shaped arm between the pivot or fulcrum of the lever and the point of connection with the diaphragm, whereby louder and clearer sounds and better tones are obtained than with a lever having a solid arm.

Another ob ect of the invention is to provide relatively adjustable bearings on thesound box body for the pivot points of the lever, whereby a fine adjustment can be obtained, so that the lever will not have detrimental vibrations due to unnecessary play. \Vith such objects in View, and others which will appear as the description proceeds, the invention comprises various novel features of construction and arrangement of parts which will be set forth with particularity in the following description and claims appended hereto.

In the accompanying drawing, which illustrates one embodiment of the invention and wherein similar characters of reference. indicate corresponding parts in all the views, Figure 1 is a front view ofla sound box with the improvement applied thereto. a portion being shown in section to illustrate the details of construction; FigLQ is a sectional view on the line 22, Fig. 1; Fig. 8 is a perspective view ofthe stylus lever; Fig. 4

is a perspective view of one of the bearings of the stylus lever; and Fig. 5 is an enlarged detail view of the mounting for the stylus lever.

Specification of Letters Patent. Patented June 27, 1916, Application filedtfuly 13,1915. SerialI No. 39,574. I

'1 Referring to the drawing; leiasignebes TEIOI-ILAUF, a I

the body of the sound. box in which is mounted ny suitable manner a diaphragm which the stylus lever B is connected. nsle'v'er has .a central block-like bodyj2 provided-with pivot points or studs 3 projecting axially from opposite ends, and these points engage in shallow depressions 4 in adjustable bearings 5. These bearings are L-shaped members fastenedto the periphery of the body A of the reproducer.

This body A has .a flat surface 6 provided with a longitudinal central groove 7, and in this groove tongues 8 on the base members of the bearings 5 slidably engage. Clamping screws 9 pass through slots 10 in the base members 11 of the bearings and screw into the body of the sound box, whereb the bearings can be clamped in any desired position of adjustment so that the lever can be accurately mounted. The lever B has an arm 12 which extends radially ofthe sound box from the hub or body portion 2, and the inner end 13 of the lever is connected with the center of the diaphragm 1. From this point the arm 12 is bifurcated, with the 1 members 14 gradually diverging to the body or hub 2 of the lever, where the branches are rigidly connected. 7 By actual test. it has been found that this V-shaped arm co'nduces materially to improve the sound reproduction.

The other arm 15 of the lever has the usual- 7 socket for receiving the stylus or needle It. It will be noted that the lever has considerable width at the hub or, body 2 and the connection with the accompanying drawing,

the advantages of the construction and method of operation-twill be readily under-- stood by those skilled in the art to which bearing points'are-wide apart. Thisis ad-.

ioregoing description taken A I the invention apperta'ins, and while I have described the principle of operation, together with the device which I now consider to be the best embodimentthereof, I desire to have it understood that the device shown is merely illustrative and that such'ehawges may be'made when desired fall within ,the scopeof the appended claims.

Having thus described my invention, I claim as new and desire to secure by Letters Patent: 4

1. A phonograph sound box comprising a body, a diaphragm mounted therein, a stylus j'lever radially disposed with respect to the diaphragm; and means for fulcrnming the lever on the periphery of the body, said lever having a needle-holding arm extending outwardly from the fulcrum and an inwardly extending arm composed of two members converging inwardly and integrally connected together, the inner end of the inner arm being rigidly connected to the center of the diaphragm.

2. A phonograph sound box including a body, a diaphragm, and a single lever fulcrumed on the body and directly connected withthe diaphragm and forming a stylus carrier, said lever including an arm extending inwardly from the periphery of the body, said arm being composed of two members converging inwardly toward the center oi" the diaphragm and united rigidly together, and the said members being located at opposite sides of a radial line passing through the center of the diaphragm.

3. A phonograph sound boX comprising a body, a diaphragm mounted therein, and a stylus lever consisting of a hub fulcrumed on the body and having a needle-enrrying arm extending in one direction and an oppositely extending arm composed of two members rigidly connected with the hub and converging therefrom toward the center of the diaphragn'i in. a plane substantially parallel therewith, and the outer enls of the members uniting to form a laterally bent extremity rigidly connected with the center of the diaphragm.

4-. A stylus lever for a phonograph sound box, comprising a hub, members rigidly connected therewith and converging therefrom to form an arm that is provided. with a laterally bent extremity for connection with a dia 'ihragm, and a needle-carrying arm connected with the hub and. projecting oppositely from the first-mentioned arm.

'In testimony whereof I have signed my nameto this specification in the presence of two subscribing witnesses.

HARRY TEICI-ILAUF.

Witnesses C. BRADWAY, PHILIP I). RoLLnAUs.

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