US979245A - Mechanical horn. - Google Patents

Description

O; U. ARLITZ. MECHANICAL HORN.

APPLIUATION FILED JUNE 4 1910.

979,245, Patented Dec. 20, 1910.

UNITED Specification of Letters Yatent.

MECHANICAL Horus.

Application filed June 4, 1910. Serial No. 564,907.

To all whom 'it may "concern:

Be it known that I, OSCAR. C. Annrrz, a citizen of the'United States, residing at the borough'of Manhattan, in the city, county, and State of New York, have invented cer tain new and useful Improvements in Mechanical Horns, of which the following is a specification, reference being had therein to the accompanying drawings, which form a part thereof. y v

2 My invention relates to mechanical horns and more particularlyto a type thereof emplt iyling a ,mechanically flexed diaphragm.

provide a horn of this cliaracterwliichwill develop soundwaves in volume sufficiently great to adapt the device for signal-purposes 'n' connectionwith boats, marine protection stations, or infact any and all connections where, sound waves of high frequency are required-for the purpose of penetrating to substantial distances.

A stilli'fu her object is to provide a device of' this characteremploying a plurality of diaphragms actuated syntheticallyand projecting the sound waves through an amplifier common to both diaphragms without absorbing any substantial quantity of the sound Waves.

A still further 0 'ect is to provide a device employing a p urality of diaph'ragms which maybe operated by a simple and compact mechanism common to both of said dia-' phra'gms, thus" insuring uniformity in the actions of the diaphragms.

A still further object is toKso construct and arrange the diaphragms and the. mecha nism actuating same as to permit the free unobstructed vibration of both'diaphragms irrespective of the position of the actuating mechanism relative thereto.

,A still further object is to provide a horn of this character employing a plurality of oppositely disposed vparallel diaphragms and a rotary hammer, the axis of which is perpendicular to the axisof said dia 'ihragms, thus causing said hammer to impact with both diaphragms simultaneously to develop sound waves by 'simultai'ieous fiexurc of both diaphragms, wherein the said hammer is so constructed as to recede with the diaphragm in case of a loss of synthetic operation be-' tween either of'the diaphragms and the hammer. A still further object. is to provide in a horn of this' -character employing a diae-niaiiL-bbjectof theinvention is to.v

in case of 8.

upon the y and a sound outlet common to both of said and an amplifier communicat ng;

casing of the horn having at the Patented Dec. 20, 1910.

phragm anda rotary hammer, the axes of.

said hammer and diaphragm being perpem dicular to each other, wherein the impact? headof the hammer is capable of ,moven'ient axially of the diaphragm thus causing thecentrifugal force developed by the rotation of said hammer to aid in the restoration of the impact head to normal after it has been caused to recede with the di'a l'imgm.

' A still further object is to-pi ovide a horn of the character immediately ah'ove sp'ecified;

plemented means tendin 'pro ect they pact hej d .ofl fii its full operativeposition.

A-still further object isto provide; in a horn of this character agliammer impact.

:wherein .the.ce t -,if 1 forceifwin bays? I. 0. :normally I inember which is capable of receding with the diaphragm upon the reflex,

of .jthese parts, said impact n en'iber;

diaphragm; And' a-st-ill provide ahorn of ,.this character the cox-'1- on thereof loss of they-synthet --opera tion; being so .constructed and arranged as to not ,recede struction and design of which will be such as to permit of its production at a low cost.

The invention consists primarilyin 1a nae-1 chanical horn embodying therem.. a plu'' rality of parallel diaphragms, a;. rotary impactmembe'r arranged betweengang ladapted to impact with and vibratebothof said diaphragms, the axis of said imp I her being perpendicular .to-the axe" diaphragms, a casing. -liavir ig a outside of each said diaphragm of said chambers,

with said .sound outlet; and in" such otli'erf novel features'of construction and 'combinaiIOII Of parts as are hereinafter-setforth and.

In the embodiment of my invention shown in the drawings, I have shown at a the outer drawings 'fi- Figure 1' is a horizonta section through the diaphragm front there Qua-- of, the sound outlet opening Z, in communication with which is the amplifier orliorn proper c. Mounted within the casing a is a drum 4 carrying the rings 0 f, or other means securing the edges of the flexible diaphragms g g in relation to said drum. The

sole function of this'drum lsto support the diaphragms, and the motor actuating the hammer, although if desired,' in the interests of compactness of structure, said motor may be mounted within thecasing a exteriorly of,

said drum, said drum being provided with suitable bearings for the shaft of said motor.

This manner of mounting a diaphragm affords an inert body of a r of fixed volume rearwardly of each diaphragm thus limiting theprojection of the sound waves to a direction forwardly of said diaphragms.

Within the casing a and inclosing the ends of the drum (1, are casings forming the branch chambers h h containing the air "column, against which the dia'phragms g act, these chambers converging toward the sound opening I) so as to combine and prointo the amplifier c.

ject the sound waves through said openin It 'will be observe that by this arrangement the'conditions forwardl'y of each diaphragm are the same, and

' increase or impac said imp c the diaphra that the combined sound wave's'of both of said dia hragms are concentrated and de-' liver-ed rough the said sound opening I), the construction and arrangement of the walls forming the branch chambers h h tending. to amplify the sound wavesbefore their escape through the said opening. The branch chambers hf, of the chamber within the casing a, contalning the column of air against which the diaphragms act, afford a' constructionwherein the combined action of the two diaphra s is-on substantially the same column 0 air which when said diaphragms are vibrated, will result in an volume of sound waves of substantially the same frequency and duration and will avoid interference with either. diaphragm froin the other.

Each diap ra g g qc arries a wear plate em r i i' centrally thereof, member being of small dimensurethe maximum vibrations o from the engagement of the impact lneim er of the hammer therewith.

' Mounted within the casing a or within sions to th e drum d, as desired, is an or inaryelectric motor j, the terminal wires "j" j of which extend through the said drum and the casing-ato a bat ry or other source of ower not shown. VVlnle an electric motor is the preferred source of .power, owing to 'its being constantly in readiness foruse,

any other desired source of power may be em loyed.

arried by the motor shaft is are a plu= rality of radially extending hammer arms m m, preferably two in number, said arms,

owing to the fact that the axis of said shaft k is perpendicular to the axes of the diaphragms g g, extending into close juxtaposition to the impact members i i on the said di'aphragms.

To Insure the highest efiiciency it is essential to; provide clearance for the free vibration of the diaphragms g g as'interference withsuch vibrations from the hammer mechanism would lead to a loss in volumeof the sound waves resulting from the tlexure of the diaphragms by the actuation of the power mechanism. Inasmuch as it is necessary in' order to' flex the diaphragms, for

the development of the sound waves, that the impact member "should project to a pointbeyond the normal plane. of the impact members i i", it will readily be understood that,

owing to the highfrequency of the vibrations of said diaphragm, it .will' be practically impossible to synchronize the move ment of the hammer mechanisln with such vibrations. Hence it becomes necessary to construct and arrange the hammer heads 'ihat while normally projecting beyond the normal plane of said impact members so as to secure the-desired flexure of the diahragms, withthe operation thereof, said 'ammer heads, if'engaged by'the diaphragm upon the reflex action thereof, will'rec'ede from their normal position with the diaphragm, and thus avoid any material interference -with -the vibrations of the diaphrag'ms or the frequency-and duration of the sound waves resulting therefrom. To accomplish this result, I preferably use the arms mm bifurcated at the ends and form slots in the. fork thus formed, to accommodate the trunnions a on the hammer heads a,

thus permitting the reciprocation of said hammer heads and at the sametime permitting the rotation thereof under the force of the Impact in a manner to minimize wear on said head. Said heads a are preferably in.the form of disks'thus facilitating the rolling contact above referred to and at the a same time securin a cam-like action upon the diaphragm. iile the weight of the hammer heads and the rapid rotation of the arms m m will, through centrifugal force, tend to project these heads toward the diaphragms to the full extent permitted by the slots in which the. arbors a move, I have found that this. force unaided, will not restore these heads to normal after they'have been pushed radially toward the shaft 7; by

either diaphragm, rapidly enough to secure the uninterrupted, successive flexures of the diaphragm. To obviate this difficulty, I form in each arm m m below the head a a spring seat in which is mounted a light spring 0 tending to normally project its head a into a posit-ion where it will engage the impact members if.

In operating the device it is merely necessary to close the circuit through the terminals y" causing the motor j torapidlyrotate the shaft 70 and the arms'm, m, carrying the hammerheads 02. As these arms rotate, the said head-sfpassing the dermal plane of 4 the impact members 2' 2", simultaneously flex.

both diaphrams g: g to substantially the same extent, thus setting up vibrations in fof said diaphragms, the soundfii'vaves'iare not modified or afi'ectedin anyf wayfby the both diaphragms and developing sound waves forwardly of each, and within the branch chambers h h. Such vibrations will correspond in frequency and duration unit;

ingwithin the casing a adjacenttojt 1e sound opening Z) through which they pass to the amplifier c. -T he motor a'n'dthe hammermechanism not'being within the column of air influenced by; the vibrations or Jfie'xure actuation of this mechanismforlthe vibrat'ions incidental thereto'J'The' aXis of-ftheshaft k, being perpendicular'to the axes of the diaphragms g g, and the arms m when flexing the diaphragm, being in, su'b 'stantial alinement withthe axes of said diaphragms, it becomeszapparent that the diaphragms will'be under all conditions simultaneously flexed, although by a wiping action which will develop side pressure upon the arborfs 11; of the-hammer heads a to an extent to avoid such reactions upon said.

heads as to cause them to recede against the tension of their springs 0. If, howevjer,.. 1n

n addition to the side pressure above referred to, there is a pressure.exerted'substantially radially of the shaft k, upon the heads n by either diaphragm g gf upon its reflex action, this pressure, aetlng dlrectly against the said springs,,f.will cause the hammer heads to recede with the diaphragm, the

springs 0 restoring 'them to their normal pol sition immediately so that/before the completion of thehalf revolution between the impacts the heads will be restored to their operative position. r The arrangement of the diametrically opposite arms simultaneously Contacting with the paralle diaphragms,will with an ordi nary motor running at from twelve to eighteen hundred revolutions per ininute, 1m-

'parttlouble this number of vibrations to the diaphragm by a direct impact, thus increas-' ing both the frequency and volume of the sound waves developed over the use of a single diaphragm and a single impactmenn her. The' result is sound waves of high frequency and-high-powers of penetration coupled with large volume which in conjunction with an ordinary amplifier adapts the device to various uses as signals.

The long leverage at- WlllCl'l' the hammer heads 71 act furthermore insures .a sufl ieciently. sharp impact to insure -the rapid flexure of the diaphragm and .vibrati'ons of high frequency. thus increasing the volume' of the'sound waves developed witlithe con smnption-of a given quantity of power, in

addition to that incre'asein the volumeiof sound wavesincidental to the multiplication of diaphragms and the simultaneous fiexure .of-same. am awarethat it is old to develop sound I waves, by the mechanical vibration of a; dia- "broadly. I believe, however,- .it is broadly new to combine.aplurality'bf diaphragms with a hammer mechanism simultaneously flexing both diaphragmslwhich diaphragms act upon the same column-of air and/I in-i tend; to claim such broadly It is not my intention to limit th'ein'vr-m tion to the precise details -of- -con' struction A shown in the ac'companyin rdrawings, it

being apparent that such maybemodified I without departing-from the spirit andscope of the invention. v Having described the invention, what" I "claim as new, and desire'to haye protected by Letters Patent, is;*

r 1. A mechanical horn embodying therein a plurality of parallel diaphragms, a rotary imp'act member arranged between, andadapted to vibrate bothof, said diaphragms, a casing having a chamber upon the outside .ofeach' said diaphragm and a sound outlet comm ontoboth'of said .chambers,and an amplifiercommunicating with the Said sound outlet v r 2. A- mechanical horn embodying therein a drum the ends of which are inclosed by a inert column of air is formed between said dia'phragms, a rotaryimpact member, .arranged between, and adapted to-vlbrate both of, saidxdiaphragms, "a casing having a chamber-upon the outside of each said diaphragm anda sound'outlet common to both V of said chambers, and an amplifier communicating .with the saidsound outlet,-

' 3. A mechanical .horn embodying therein impact member arranged ,between, and

adapted to vibrate both of, said .di'aphragms,

a casing having a sound outlet,- a large chamber ad acent to said outlet and branch diaphragms whereby a singlecolumn ofi air is formed which is simultaneously displaced by both of said diaphragms, andsaid sound waves will be collected and simultaneously SOIInCl 'outlet.

(l; A mechanical horn embodying therein a; plurality of parallel diaphragms, a-rOtflIjV impact member arranged between, and adapted to vibrate both of, said d aphragms,

said impact member Cbmp'risiug. rotary stem and a hammerhead capanlmof' move- ,rl s chambers extending from-said last mentioned chamber forwardly of ,each of-sa-l'd.

discharged through said sound outlet, and an amplifier communicating with the s'ald c v 100; plurality of parallel diaphragms,.whereby an a plurality of parallel diaphragms, a rotary cment relative to said stem and normally proj ecting beyond the planes of said diaphragms,

of the latter, a casing having a chamber upon the outside of each of said diaphragms and a sound outlet common to both of said chambers, and an amplifier communicating with the said sound outlet.

5. A mechanical horn embodying therein a plurality of parallel diaphragms, a rotary impact member arranged between, and ada Jted to vibrate both of, said diaphragms, sai impact member comprising a plurality of'rotary stems each said stem carrying a hammer head capable of movement relative to said stem, and normally projecting beyond the planes of said diaphragms, whereby said head is adapted to recede with either of said diaphragms upon an engagement of these parts upon the reflex action of the latter, a casing having a chamber upon the outside of each of said diap'hragms and a sound outlet common to both of said chambers, and an amplifier communicating with the said sound outlet.

\ 6. A mechanical horn embodying therein I a plurality of parallel diaphragms, a plurality of oppositely disposed, simultaneously rotatable impact members, arranged between and adapted to simultaneously engage and vibrate both of, said diaphragms, a casinghavin a chamber upon the outside of each said diaphragm and a sound outlet common .to both of said chambers, and an amplifier communicating With the said sound outlet.

7. A mechanical horn embodying therein a plurality of parallel diaphragms, arotary impact member arranged between, and adapted to vibrate both of, said diaphragms, said impact member comprising a pair of oppositely disposed, radially projected stems and a hammer head on each stem capable of movement relative to said'stem and normally projecting beyond the planes of said dia phragins, whereby said head is adapted to recede with either of said diaphragms upon an engagement of these parts upon the reflex action of the latter, a casing having a chamber upon the outside of each of said diaphragms and a sound outlet common to both of said chambers, and an amplifier communicating With the said sound outlet.

8. A mechanical horn embodying therein a plurality of parallel diaphragms, a rotary impact member arranged between, and

. adapted to vibrate both of, said diaphragms,

of said diaphragms upon said impact member comprising a rotary stem and a hammer head capable of move ment relative to said stem and a spring acting on said head to normally project it beyond the planes of said diaphragms, whereby said head is adapted to reccde with either an engagement of these parts upon the reflex act-ion of the latter, a casing having a chamber upon the outside of each of said diaphragms and a sound outlet common to both of said "chambers, and an amplifier communicating with the said sound outlet.

9. A mechanical horn embodying therein aplurality of parallel diaphragms, a rotary impact 'member arranged between, an '1 adapted to vibrate both of, said diaphragms,

said impact member comprising a rotary stem and a hammer head rotatably mounted in and capable of movement relative'to said stem and a spring acting on said head to beyond the planes of normally project it said diaphragms, whereby said head is adapted to recede with either of said diaphragms upon an engagement of these parts upon the reflex action of the latter, a casing having a chamber upon the outside of each of said diaphragms and a sound outlet com mon to both of said chanibers and an amplifier communicating with tlie said sound outlet.

10. A mechanical horn embodying therein a plurality of parallel diaphragms, a plurality of oppositely disposed, simultaneously rotatable impact members arranged between,

and adapted to simultaneously engage and vibrate both of said diaphragms, rotation of said impact members being per pendicularto the axes of said diaphragms, a casing having a chz 'ber upon the outside of each said diaphragm, and a soundcoutlet common to both of said chambers and an amplifier communicating with said sound outlet. 1

11. A mechanical horn embodying therein a plurality of parallel diaphragms, a rotary impact member arranged between, and adapted said impact member comprising a shaft, the axis of'which is perpendicular to the axes of said diaphragms, a pair of oppositely disposed, radially projected stems and a hammer head carried by, and capable of movement relative to, each of said stems, and normally projecting beyond the planes of said diaphragms whereby said head is adapted to recede with either. of said diaphragms upon an engagement of these parts upon the reflex action of the latter, a casing having a chamber upon the outside of each said diaphragm, and a sound. outlet common to both of said chambers, and an amplifier communicating with said sound outlet.

. -12. A mechanical horn embodying therein a plurality of parallel diaphragms, a rotary impact member arranged between, and adapted to vibrate both of said diaphragms,

said impact member comprising a rotary stem the axis of which is at right angles to the axes of said diaphragms, a hammer head capable of movement relative to said stem, and a spring acting on said head to normally the axis of 7 to vibrate both of said diaphragms,

ber upon the outside of each of said dia-' phragms and a sound outlet common to both of said chambers, and an amplifier commu-' phragms and terminates within said drumin nicating with said sound outlet. I

13. A mechanical horn embodying therein a plurality of parallel diaphragms, a rotary impact member arranged between, and

adapted to vibrate both of said diaphragms, and impact member comprising a rotary stem, the axis of which is perpendicular to the axes of said diaphragms, a disk hammer jhead rotatably mounted in, and capable of. movement relative to, said stem, and a lspring actin on said head to normally pro- "of the latter,. a casin 1 adjacent to said branch chambers are 'inject it beyond the lanes of said diaphragms,

fwhereby said hea is adapted to recede with either of saidldiaphragms upon an engagement of these parts upon the reflex action closedby a pluralityoflpnrallel diaphragms having a chamber wherebyan inert column of air is formed between said diaphragms, and said. diaphragms when flexed outwardly, act "upon substantiallythe same column of air, raised impact members carried by said diaphragms respectively, a motor mounted within said casing, the shaft of which motor is substa1it-ially perpendicular to theaxes of said diasubstantial alinement with said diaph'raglns, impact'menibers' carried by said diaphragms respectively, a plurality of diametrically 0pposite, radially projected bifurcated arms I carried by said motor shaft, each said arm-I having mounted in the for]; thereof a disk hammer head having tru'nmons mounted in elon ated slots in said arms, whereby said rhea s are capable of movement relative to said arms, a spring normally projectingsaid head beyond the normal plane of either of said diaphragms, whereby-said heads, by a wiping engagement with said impact members of saiddiaphragms, will flex said dia-' phrag-nis, but will be caused to 'r'ecede with said die hragms by a substantially radial thrust tliereon through the reflex action thereof, and an' amplifier communicating with said Sound outlet. 7 v p In witness whereof, I have hereunto affixed mvsignature, this 20th day of May,

1910, int-he presence of two witnesses. OSCAR G. ARLITZ.

Witnesses OTTO MUNK, F. T. WENTWORTH.

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