US1675853A - Wave-energy-translating diaphragm and method of mounting same - Google Patents

Description

July 3, 1928. 1,675,853

H. C. HARRISON WAVE ENERGY TRANSLATING DIAPHRAGM AND METHOD OF MOUNTING SAME Filed July so, 1924 by My? 60 a concave-sha Patented July 3, 1928. a I UNITED: STATES PATENT OFFICE.

mBY C. HARRISON, OFPORT'WASHINGTON, NEW YORK, ASSIGNOB TO WESTERN ELECTRIC COMPANY, INCORPORATED, NEW YORK, I. Y., A COBPOBATIOI OI roux.

3 wavaannar-rmsna'rme 'n'mrnnaex m mn'rnon or nomnw am Application flledluly so, 192 4. Serial No. 729,002.

This invention relates to wave energy translating diaphra s and method of mounting the same. ore specifically it refers to a diaphragm mounting of a type .5 particularly well adapted foruse 1n telephone ,transmitters, receivers, phonographs andthelike' fl The object of this invention the provision of a diaphragm mounting which will '10 be simple, efiicient, cheap to manufacture andwherein the diaphragm is tensioned in a simple and ositive manner.

.A feature 0 the invention resides in the rovision ofmeans whereby the diaphragm I is tensioned and free to vibrate uniformly to each side of its normalrestmg plane.

Another feature is the provision of means whereby the dia hragm is tensioned progressively to its a justed period of vibration.

I) Another feature is the provision of means whereby the diaphragm is yieldingly held during the initial tig tening applied to its mountin for" removmg any unevenness 1n the blanE. a

Another feature is the rovision of a rin of yieldable materialv for orcing portions .0

' the diaphragm into circular grooves in the mounting for tensionin the diaphragm un formly to any desired equency.

80 Other features and advantages will appear from the following descri tion andby the claims appended thereto, re eren ce bem had to the accompanying draw ngs in whic Fig. 1 is an assembly view of the mounting as with the upper ring, the soft metallic-ringand the diaphragm partially cut away.

Fig. 2 is a sectional view ofthe mountingtaken approximately on line 22 of Fig, 1. Fi 3 1s a sectional view of the'mounting showing the diaphragm positioned between the grooved ring and the soft metallicring;

and

- showing the rin' in position when the dia- 46 phragm is'stretc ed to its required tension. Similar reference characters refer to similar arts throughout this description. The diaphragm mounting of this invention consists of a metallic ring 11 which has surface 12 and a guide portion 13 a apted for holding a soft metallic ring 14 in adjusted positionin the concave portion 12.

The diaphragm 15 is mounted between the Fig.4 is '1. view similar to that of Fig. 3,

- ring to tension the diaphragm.

rin 14 of relatively soft metal, such as lea and the ring 16 which is provided with a plurality of concentric corrugations or grooves 17 made of decreasing depth toward the center as shown in F i 2.

The ring 14 and the diaphragm 15 are 00 clamped between rings 11' and by means of a plurality of screws -18 dis osed in a circular row around the flange o rin 11 in engagement with similarly disposed t readed holes in the ring 16. The edge of the concave portion 15' is adapted to engage and force the periphery of t e diaphragm and ring 14 into t e outermost disposed groove 17 of ring 16 through a relatively slight tlghtenin of screws 18. This initial pressure resu ts in stretching the diaphragm uniformly and removes any unevennes in the blank partly due to the fact that the material used for ring 14 is sufliciently mal-- leable to permit a small amount of slippage between the effective surface of the ring 14 in contact with the diaphragm andthe corrugated rtion 17 in contact with the oppgsite si e of-the diaphragm. By applying rther pressure on "the clamping rings through the tightening of screws 18, concentric portions of the diaphragm are rogressively forced into the corrugations 1 The diap ragm is then positively held therein b means of the'soft metallic ring 14 whic gradually takes the form defined by the oooperating gripping portion of rings 11 and 2. In a mounting or a wave. energy 'translating diaphragm, the combination with superposed clamping rings, a ring of malleable material associated with said rings, a diaphragm interposed between one of said clamping rings and the malleable 10s ring, and means rmed in one of said rings for stretching said diaphragm uniformly.

3. In a mounting for a wave energy trans- 1 of the diap lating diaphragm, the combination witha concave-shaped ring, a superposed flat ring, a plurality of concentrlcallp disposed annularmembers formed in sai the flat ringi1 and means for forcing portions bi said members for tensioning said diap ra uniformly.

4'. a mounting having 1p 1ng ortions, a diaphragm and a ring o sofi matgrial disposed between said portions, ti htenin meansvassociate'd with said rings or forcmg portions of the soft material into said gripping ortions for stretching the diaphragm uniormlyr ,4

5. In a mounting'for-awave energy trans superposed clamping rings, ag-recessed portion in men said rings, a plurality of concentric corrugations formed in the other ring, a diaphragm fastening means for securing said diaphragm between said rings, and means interposed, between said :.dia-.

phragm and the recessed portion of thering for forcing portions of the diaphragm or ten-- into the grooves of said other ring sioning said diaphragm uniformly.

' 6. In a mounting, apair of superposed flat ring, a 'dia-. phragm interposed between the concave and ragm into the groovesformed for a wave energy trans lating diaphragm, a pairvof superposed rings ing-t e mounting-blocl;

hragm to take t e shape of 'one' of said gures for 'tensioning said diaphragm uni- .forrnlI ;i a mounting, a pair of superposed rings having cooperating portions shaped toform different eometrical figures, a wave energy translating diaphragm and. a ring of flmalleable material interposed. between said portions, and fastening means to cause the diaphragm to take the shape of one of said figures and the ring to take the shape 0% both of said figures for tensioning the dia p m lating diaphragm, the combination with T8.

uniformly. v he' method of mounting and tensioning wave energy translatingdiaphragms by subjectin the diaphragm and a ring of [soft corrugated and concave surfaces of" two clam ing rings, and ogressively' 'tightenfor-positively hold- .H lVRY 0.1 HARRISON.

:material to an miti'alpressure' between the '55 ing the diaphragm'ito its a j sted Position

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