US1908022A - Sound locating apparatus - Google Patents

Description

May 9, 1933. 1l Q KARNES 1,908,022'

SOUND LOCAT ING APPARATUS Filed Nov. 2, 1931 "INI/ENTOR. Jamas. I: Kam-LEE f@ BY M/m ffy/M ATTORNEY Patented May 9, 1933 JAMES C. KARNES, OF BUFFALO, NEW YORK SOUND Locarrive APPARATS Application filed November 2, 1931. Serial kNo. 5,727,544.

(GRANTED UNDER THE ACT or Manen s, 1883, As AMENDEnAPRrL' so,1 '1928; .37o o. 7 5?) i The invention described herein may be manufactured and used by or for the Government for governmental purposes without the payment to meot' any royalty thereon. e This invention relates to a sound locating apparatus of the type operating according to a system of binaural comparison in which the apparatus is directed at the source of sound and the listener reduces the phasediiierence l to Zero. 1

Such apparatus, as disclosed for lexample in Patent No. 1,7 7 4,826 of September 2, 1930, includes two pairs of horns arranged'on intersecting base lines to respectively afford l lateral and vertical'impressions of direction in azimuth and inl elevation.

The purpose of the present invention is to effect a reduction in the size and weight of the apparatus by eliminating one of the tour d@ horns. One of the lateral horns is common to both the lateral and vertical sets and in a modification each of the lateral horns may be grouped with the vertically spaced horn.

M With the foregoing and other objects in u View, the invention resides in the novel arrangement and combination of parts and in the details of construction rhereinafter described and claimed, it'being understood that changes in the precise embodiment of the invention herein disclosedmay be made withinV the scope of what is claimed without depart.

ing from the spirit of the invention. n

A practical embodiment oi the invention is illustrated in the accompanying drawing, wherein:

Fig. l is a View in front elevation, partly in section showing the improved apparatus pointed at zero elevation.

Fig. 2 is a View in side elevation thereof.

Fig. 3 is a longitudinal sectional View of the horn support. l Figs. 4 and 5 are diagrammatic views illustrating methods of pairing the horns.

Fig. 6 is a view in front elevation of the horns and their support and showing a modiiied arrangement.

Referring to the drawing by characters of reference. l

The apparatus comprises amount in which a base 5 rotatably supports a top carriage 6 top carriage and having al gear 9 meshing on the support 12 isv actuated by wormlgear- 60 ing lcarried bythe top carriage and provides means whereby the supportV is rotated about its axis. 'f 'f' f Y, y An arm 16 is fast onthe center of the'support and is positioned perpendicularthereto at a point midway between the arm 7 Vofthe, top 'carriage as shown in F ig. l or at one end of the support 12 as shown in Fig. 6.'

A pair of horns A and B arranged in 9 parallel relation are carried on theleXtremi- 70 ties of the support'. on the side opposite tothe arm 16. The horns are each attached to the support by meansrof a bracket 17 whose length is so determined that the -horns A and B will be counterbalance the arm 16 and i375 horn C on the extremity thereof- The trunnion members are hollow and while they may be utilized to forma part of the'horns as taught by the prior arty they are Y preferablyfemployed Vas a casing orhousing EA f i for-flexible sound conducting'tubes a-b-cleading respectively Vfrom thehorns A-B4C and passingthrough anVapertu-re 16a-in the arm 16. As'shown in' Fig. 4 the tubesa-b are connected to the head set 18 of the azilr85v muth listener, and -one of them, in the present instance the tube a is divided so that one V.of the branches is available for pairing with the v tube c on the head set 19 for the verticalV or elevation listener. As shown in Fig. 5by H0 also dividing the tubesk Z) and c, a third grouping b-cris availablefor ahead set 20 -ofpa i third listener who has' an opportunity to y check or listen for signals; The group b-c combines the lateral separation between the 595 horns of theazimuthlistener with the vertical separation between the horns of the eleva- 'Y tion listener. y

As seen in Fig. 1 the horn'C is of the type i y i shownin Patent No. 1,7 58,393 of May 13,5136V 1 are provided.

1930, in Which increased directivity is obtained by providing an eccentric throat 21 and a plane inner side 22 adapted to loaie non-frontal sound Waves. The horns A and B are each provided With the plane inner side 22 but since one or the other of them is additionally paired with the horn C, the side 23 nearest to the horn C and Which constitutes the inner side of the vertical or elevation group is likewise a plane surface. The position of the throat 21, looking into the horns A or B therefore at one corner.

I claim. Y Y

l. In a sound apparatus, a mount, a support trunnioned on the mount, spaced horns carried by the support, means for coupling said horns form a sound receiver set, an arm tastion the support at one end thereof and perpendicular thereto, a horn on said arm means' for coupling said horn to'each of the spaced horns to fornipsound receiver sets.

2. In a sound apparatus, a mount, a supporttrunnioned on the mount, spaced horns carried by the support, means for coupling said horns to forni a sound receiver set, an arm fast on the support and perpendicular thereto, a horn on said arm and means for coupling said horn to each of the-spaced horns to form sound receiverl sets.

3. In a sound apparatus, a mount, a support trunnioned on the mount, spaced horns carried by the support, means for coupling said horns to forni a sound receiver set, an arm fast on the support and perpendicular thereto, a horn on said arm and means for coupling said .horn to one of the spaced horns to formy a sound receiver set.

4;. In a sound apparatus, horizontally and vertically spaced sound receivers arranged on intersecting basel lines, and means for coupling one sound receiver from each baseline into a sound receiver set.

51. In `a sound apparatus, three sound receivers arranged on tvvo intersecting base lines and means for coupling each sound receiver with the `remaining sound receivers whereby three separate sound receiver sets 'JAMES o. KARNEs

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