US1689286A - Talking machine employing large diaphragm - Google Patents

Description

L. LUMIERE Oct. 30, 1928. I 1,689,286

TALKING MACHINE EMPLOYING LARGE DIAPHRAGM Filed Nm r. 4, 1924 '2 Sheets-Sheet 1 Oct. 30, 1928. 1,689,286

L. LUMIERE TALKING MACHINE EMPLOYING LARGE DIAPHRAGM Filed Nov. 4, 1924 2 Sheets-Sheet 2 Patented Oct. 30, 1928.

UNITED STATES 1,689,286 PATENT OFFICE.

LOUIS LUMIERE, OFLYON, FRANCE.

TALKING MACHINE EMPLOYING LARGE DIAPHRAGM.

Application filed November 4, 1924, Serial N0. 747, 860, and in France November 28, 1923.

This invention relates to improvements in talking machines employing large diaphragms. In my application for patent Serial No. 744,036, filed in the United States October 16, 1924, and filed in France November 16, 1923, entitled Talking machines employing large diaphragms, I have described a method of mounting the diaphragm of talking machines employing large diaphragms, so that it can occupy substantially a vertical position, at right anglesv to the record, durmg playing, while when not in use it may be ar ranged to lie horizontally substantially parallel with the diaphragm, so that the lid of the 1' talking machine casing may be closed.

The present invention relates to alternative means for carrying out the invention which forms the subject of the above mentioned application.

According to thepresent invention a carry ing arm is pivoted to a fixed point, for example on the cabinet of the machine, and upon the end of this arm the diaphragm is mounted with a double articulation.

The invention is illustrated in the accompanying drawings, in whichFig. 1 is an elevation showing the diaphragm in the playing position, i

Fig. 2 is a plan view of the same, while Figs. 3 and 4 are respectively elevation and plan views of the diaphragm in the non-playing position.

Figs. 5 and 6 illustrate the details of construction on a larger scale, Fig. 5Jbeing a side tween two metal rings, or in a single metal rim (Figs. 5 and 6) the edges of which are bent over and clamped on the. edge of the diaphragm, so as to forma rigid ring 7*. On one face of the ring r is fixed a star shaped support, by 'means of its radiating arms a, which meet at the middle in a boss 0' (Fig. 4.) On the inner face of this boss is mounted so as to oscillate, a bell crank, not shown in the draw-' ing, and one arm of this bell crank is connected to the diaphragm cl while the other is connected to a transmission member y which in turn is connected to the oscillating needle tion is that the diaphragm d is mounted at one part of its circumference upon the free end of a horizontal arm 1), the other end of which is mounted to turn about a vertical axis f, with a ball hearing if desired, which is fixed at a suitable point upon the top board 2' of the case of the machine, Figs. 1 to 4.

The diaphragm is mounted upon this carrying arm 72 with a double articulation, as will be seenfrom the drawing, Figs. 5 and 6. On the opposite sidesof the ring r to that which carries the star shaped support 0, c, a cross bar It is fixed by means of screws or bolts, the bar at extending across between the ends of two of the arms 0, between'i which is mounted tlie needle holder, carryingjthe needle .12. On the outer face of this crossbar t is fixed a stub shaft 0 perpendicular to the plane of the cross bar and of the diaphragm and situated between the transmission member 3 and the rear end of the cross bar at (Fig.5).

The diaphragm d is able to rock onthe'free end p of the arm p by meansof the stub shaft 0 which turns freely in an eye formed in a lug m on a sleeve m which is mounted to turn on the end 9 of the arm p. The sleeve m lies at right angles to the lug m and the stub shaft 0. In Figs. 5 and 6, it will be seen that the end 19 of the arm p is reduced in diameter and that the sleeve m is held thereon by means of a Washer s and a screw 1). While one type of means has been illustrated for mounting sleeve m it is to be expressly understood that the invention is not limited to the particular embodiment illustrated. The vertical shaft f about which the arm p turns is mounted at a convenient point on the board 71 with regard to the record disc D, Fig. 2, in order that the plane ofthe diaphragm in the playing position may be able to turn through an angle, between the limits generally accepted in relation to a tangent to the sound groove at the point of contact of the needle :0 with the disc D.

The point at which the stub shaft 0 is mounted on the cross bar it, and consequently the position of the diaphragm, is selected ac-' cording to the weight of the latter, in order that the pressure of the needle on the disc is within the limits permissible. This point 0- may not lie within the circle of the diaphragm as will be readily understood by those skilled in the art.

The pressure of the needle 00 upon the disc D may also be regulated by means heretofore employed in the art for this purpose.

The arrangement described allows the diaphra 1n d either to occupy a vertical position, for p aying, as shown in Figs. 1 and 2, or to occupy a horizontal position, as shown in Figs. 3 and 4, when the machine is not in use. The latter position is obtained by causing the diaphragm to oscillate first of all about the stub shaft 0, so as to raise the diaphragm from the disc record, and then folding the diaphragm down by turning the sleeve m about the end of the arm 1).

The plane of the diaphragm may be parallel to that of the arm p or it may form with it any desired angle, without any departure from the present invention.

The form of the carrying arm 1) may be varied, as also the manner in which it is mounted.

I claim:

1. In combination with a casing, a horizontally swinging arm pivoted to said casing, a diaphragm adapted to occupy a substantially vertical playing position, a peripheral mounting for said diaphragm, and means including a pivot member secured to the mounting adjacent the periphery thereof for securing the mounting to said arm, said means permitting movement of the diaphragm about said arm in two planes.

2. In combination with a casing, a horizontally swinging arm pivoted to said casing, a diaphragm'adapted to occupy a substantially vertical playing position, and pivotal means for securing the diaphragm to said arm, and permitting movement of the diaphragm in its own plane and also in a plane at right angles thereto, the major portion of said diaphragm being located above said arm when the diaphragm is in playing position.

3. In combination with a casing, a solid arm mounted'for pivotal movement in a horizontal plane on the casing, a diaphragm adapted to occupy a substantially vertical playing position and a substantially horizontal non-playing position, and means including a horizontally disposed pivot member secured to the arm above the latter for attaching the diaphragm to said arm.

1. A. mounting tor a diaphragm comprising, in combination with a casing, a horizontally swinging arm pivotally secured to said casing, a diaphragm, and means for pivotally securing said diaphragm to said arm ineluding a pivot member eccentrieally secured to, said diaphragm, said means permitting pivotal movement of the diaphragm about two axes at right angles to one another.

5. A mounting for a diaphragm comprising, in combination with a casing, a horizontally swinging arm pivoted to said casing, a diaphragm adapted to occupy a substantially vertical playing position, a peripheral mounting for said diaphragm, and means including a pivot member secured to the lower portion of said mounting for securing the mounting to said arm. I

6. A mounting for a diaphragm comprising, in combination with a casing, a diaphragm adapted to occupy a substantially vertical playing position, a peripheral mounting for said diaphragm, a horizontally swinging arm pivoted to said casing, said arm being approximately tangent to the lower edge of said diaphragm, and means including a pivotmember secured to the lower portion of said mounting for securing said mounting-to said arm.

7. In combination with a casing, a horizon tally swinging arm pivoted to said casing, a diaphragm adapted to occupy asubstantially vertical playing position and a horizontal non-playing position, a stylus for said diaphragm, and means'pivotally connected to the diaphragm, adjacent the lower edge of the same when the latter is in playing position, and pivotally secured to said arm for adjustably mounting said diaphragm on the arm.

8. A mounting for large diaphragms comprising, in combination with a casing, a horizontally swinging arm mounted on the easing, a sleeve rotatably mounted on the free end of said arm, said sleeve being provided with an opening therethrough, the longitudinal axis of which is disposed at substantial- 1y right angles to the longitudinal axis of said arm, a diaphragm, a frame secured to said diaphragm, and a pivot member secured to said frame and ositioned in said opening.

9. A mounting or large diaphragms comprising, in combination with a casing, a diaphragm, a substantially rigid peripheral frame for said diaphragm, a supporting bar extending across the lower portion of said diaphragm and secured to said frame, a shaft extending from said bar at right angles to said diaphragm, a horizontally swinging arm mounted on said casing, a sleeve rotatably mounted on said arm, and a lug on said sleeve forming a bearing for said shaft, the longitudinal axis of which is disposed at substantially right angles to the longitudinal axis of said arm.

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