US1491723A

US1491723A - Sound box for talking machines

Info

Publication number: US1491723A
Application number: US593088A
Authority: US
Inventors: Nalbantian Karakin
Original assignee: Individual
Current assignee: Individual
Priority date: 1922-10-07
Filing date: 1922-10-07
Publication date: 1924-04-22
Anticipated expiration: 1941-04-22

Description

April 22 1924.- 1,491,723 K. NALBANTIAN f SOUND BOX FOR TALKING MACHINES Filed oct. v. '1992 Patented pr. 22, 1924.

UNITED STATES,

' SOUND BOX FOR TALKING vlVIACPIIlIiI'ES.`

f Applicationv filed October 7, 1922. Seriallo. 593,088.

To all whom it may concern.

Be it known that I, KARAKIN NALBANTIAN, a citizen of Armenia, and a resident of the city of New York, borough of the Bronx, in the county of Bronx and State of New York, have invented a new and Improved Sound Box for Talking Machines, of which the following is a full, clear, and exact description.

This invention relates to sound boxes for talking machines and has for an object to provide an improved construction which may be readily used with either zigzag or hill-and-dale records.

The object of the invention is to provide an improved construction or sound box ada ted to be used with the usual talking mac ine tone arm and adapt the tone arm to operate properly in association with either hill-and-dale or zigzag grooved records.

Another object is to provide a sound box in which the parts are so arranged that they may be readily removed but when in use are firmly clamped together.

In the accompanying drawings- Figure 1 is a side view of a sound box embodying the invention, the same being shown in connection with part of the tone arm of a talking machine.

Figure 2 is a view of the sound box shown in Figure 1 approximately on line 2 2.

Figure 3 is a sectional view through Figure 2 approximately on line 3 3, the 'same being on an enlarged scale.

Figure 4 is a sectional view through Figure 2 approximately on line 4--4, the same being on an enlarged scale.

Referring to the accompanying drawing by numerals, 1 indicates the goose neck of a talking machine and forming part of the tone arm structure, said goose neck not forming any part of the present invention but used in connection with the sound box 2, which sound box is connected with the goose neck in any desired manner, as for instance, by friction. The sound box 2 is. provided with a body 3 merging into a tubular flange 4 and into an annular flange 5 whereby a casing is provided. The flange 5 is internally threaded so as to readily receive the externally threaded washer or ring 6. A pair of cushioning rings 7 and 8 are arranged in the casing and on opposite sides of the diaphragm 9 which is preferably of sheet metal and which is provided with an aperture 10 for receiving the offset and preferably somewhat enlarged portion 11 of the projecting base 12 forming part of the stylus post 13. The post 13 is provided with a bore 14 and a clamping screw 15 whereby the needle may be rigidly secured in the post in a proper operative position.

It will be noted that by reason of the base 12, the oiset portion 11 is arranged centrally of the diaphragm k9 while the post 13 is otl'set from the center. Preferably, the enlargement 11 is merely iitted into the aperture 10 in such a manner as to produce a snug fit and is held in place by reason of the flat spring 16 which has a section 17 pressing against the base 12 while the ends of the spring are engaging the ring 6. It will be noted that the diaphragm 9 is resilient and also that the spring 16 is resilient whereby whenever the stylus is operated the diaphragm will be vibrated for producing the desired sound. By osetting the post 13 as setforth, the sound box may be used-y either with a hilland-dale or zigzag groovcd record.

What I claim is 1. A sound box for talking machines, comprising a casing, a diaphragm arranged in the casing, a substantially Z-shaped stylus post engaging the diaphragm and positioned with the center of the Z engaging flatwise said diaphragm, one leg projecting through the center of the diaphragm and the other leg projecting at right angles thereto, and a spring for holding the post in engagement with the diaphragm.

2. A sound box for talking machines, comprising a casing, a diaphragm arranged in the casing, a stylus post formed with a projection extending through the center of the diaphragm, and a body projecting laterally from said center, said body at the end opposite said projection having a stylus receiving opening and a spring engaging said body and pressing vthe same tightly against said diaphragm.

3. A sound box for talking machines, comprising a casing, a diaphragm arranged in the casing, said diaphragm having `an aperture in the center, a stylus post engaging the diaphragm, said post having a stylus receiving opening offset from the center of the diaphragm, said post vhaving a projecting base formed with an extension fitting into said aperture, and a spring engaging part of the casing and pressing against said extension for holding the same against said diaphragm.

4. A sound box for talking` machines, comprising a casing, a diaphragm arranged in the casing and providedfwith a centrally positioned aperture, a stylus post formed with a base adapted tobe engaged flatwise against the diaphragm, said base having a projection extending at right angles to the surface thereof and fitted into the aperture in the diaphragm, and a fiat spring engaging part of the casing and said base and acting to hold the base against the diaphragm and the projection in said aperture.

KARAKIN NALBANTIAN.