US1866231A - Sound emitting device - Google Patents

Description

July 5, 193 J. SWALLDW 1,366,231

SOUND EMITTING DEVICE Filed May 27, 1929 Patented July 5, 1932 JOSEPH SVJALLOW, OF BERVYN', ILLINOIS, ASSIG'NOR TO TEMPLE CORPORATION, OF CHICAGO, ILLINOIS, A CORPORATION OF DELAXVARE SOUND EMITTING DEVICE Application filed May 27, 1929. Serial No. 366,433.

My invention relates to sound emitting devices, and particularly to reproducing units adapted to be employed in connection with loud speakers, or the like.

The inventionhas among its other objects the production of devices of the kind described that are durable, eflicient and simple in construction.

A. particular object of the invention is to provide an improved reproducing unit of the type in which an armature is employed.

A preferred form of the invention is embodied in a reproducing unit comprising a diaphragm which is operatively connected to a movable armature positioned within a winding, the winding being adapted to be subjected to telephonic currents. Improved means comprising a relatively flexible and resilient strip of metal is provided for mounting the armature.

Many other objects and advantages will appear as this description progresses, reference being had to the accompanying drawing, wherein:

Figure 1 is a rear elevation of a reproducing unit which embodies my invention;

Fig. 2 is a section taken on line 22 of Fig. 1;

Fig. 3 is a detailed view of an armature and an armature-carrying member which form parts of the improved unit shown in Figs. 1 and 2.

Fig. 4 is a section taken on line 4-4 of Fig. 3, and v V Fig. 5 is a section taken on line 5-5 of Fig. 3.

Referring to the drawing wherein I have shown a reproducing unit which embodies a preferred form of the invention, reference character designates a housing member provided with the usual neck 11, whereby the reproducing unit may be operatively connected to a loud speaker, or the like. A ring 12 riveted to the housing member 10 clamps the marginal edge of a diaphragm 15 to the housing member 10. The central portion of the diaphragm 15 is connected to an armature 16 by a pin 17, the armature 16' being positioned within an armature-carrying member 18 that is preferably formed from non-magnetic material.

,As best shown in Figs... 3, 4t and 5, the armature carryingmember comprises a back plate 20, side plates 21 which are formed inte ral with the back plate and inwardly turned flanges 22 formed integral with the side plates 21. The armature 16 is positioned between the back plate 20 and the flanges 22, and is secured to the flanges 22 by a strip 23 which is preferably formed from relatively flexible or resilient material and extends transversely of the armature. As best shown'in Figs. 3 and 4, the strip 23 is preferably formed with a plurality of lugs 25 which are soldered to the armature 16. The ends of the strip 23 are notched to receive the flanges 22 and arepreferably soldered thereto, although any other suitable means may be employed for securing the strip to the flangesflf it is so desired.

Disposed around the armature-carrying member 18 is a winding 25 which may be subjected to telephonic currents, or the like, from a radio-receiving set, or the equivalent. The winding 25 is disposed between pole pieces 27 and 28 provided upon a permanent magnet 30 which is secured to the ring 12 by bolts 32.

The operation of the above described device is substantially as follows: The winding 25 is subjected to a telephonic current derived from any suitable source, and this causes the armature 16 to vibrate, which vibrations are transmitted to the diaphragm 15 and translated into sound.

A feature of my improved construction I have found that by employing a strip of ill) metal substantially as described above for securing the armature to the armature-carrying member, the strip may be soldered to the armature-carrying member and to the armature in such manner that it will not work itself free.

While I have shown and described certain embodiments of my invention, it is to be understood that it is capable of many modifications. Changes, therefore, in the construction and arrangement may be made without departing frpm the spirit and scope of the invention as disclosed in the appended claims, in which it is my intention to claim all novelty inherent in my invention as broadly as possible, in view of the prior art.

WVhat I regard as new, and desire to secure by Letters Patent, is:

A device of the kind described comprising a diaphragm, a winding, an armaturecarrying member within said winding, said armature-carrying member being formed from sheet metal and being provided with inturned flanges, an armature disposed within said armature-carrying member, a strip of metal extending transversely of said carrying member and said armature and extending in a plane normal to said inturned flanges, the ends of said strip of metal being soldered to said flanges and said strip of metal being provided with integral lugs 6X- tending at right angles from it, said lugs being soldered to said armature, and means operatively connecting said armature with said diaphragm.

In witness whereof, I have hereunto set my hand and aflixed my seal, this 17th day of May, 1929.

JOSEPH SIVALLOWV.

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