US 2191055 A
Description (OCR text may contain errors)
Feb. 20, 1940. K. WENZKY TELEPHONE SET FOR COMMUNICATION IN AIRPLANES Filed Sept. 9, 1937 Patented, Feb. 20, 1940 UNITED STATES PATENT FFICTE Karl Wenzky,
assignor to Siemens Apparate und Maschinen Geseilschaft mit beschrtinkter Haftung, Berlin, Germany, a
corporation of Germany Application September M1937, SerialNo. 163,077
In Germany September 7, 1936 4 Claims.
The present invention relates to telephone sets for communication in airplanes, and more particularly to an improved casing for receivers used in connection with aviators helmets and is directed generically to the same subject matter as is disclosed in the copending application of Gerald Klein, Serial No. 150,429, filed June 26, 1937.
It is known to provide telephone receivers with a casing which encloses the ear and seals it against extraneous noises which might interfere with a clear undc rstanding. It further has been proposed to lessen the pressure which such enclosed receivers exert on the ear byemploylng intermediate rubber cushions or the like.
a According to the invention, a telephone re ceiver is enclosed by an outer shell-like casing and by an inner cover which surrounds the ear of the wearer and is so dimensioned that the car may freely lie therein. The cover has the shape of a cup or pot whose bottom is provided with one or more openings for the-passage of the sound and lies directly in 'front of the telephone system. The cover consists preferably of leather.
In the accompanying drawing is shown an em- 5 bodiment of the invention in a sectional view. In this figure, 5 represents the pu't'er portion of an aviators helmet or of a similar attachment}! the inner portion thereof consisting of a lining of yielding material, and 3 a telephone receiver sys- 1 tom. A casing l covering the receiver is secured to the helmet 5 by means of a spring ring 6. The casing has preferably the form of an oval shell,
in the central circular flange 2 of which are fitted the telephonesystem 3 and the diaphragm with 5 the cover 4." 'The lining 1 covering the inner side of the helmet 5' extends only to the edge oithe casing I, so that the opening of the casing remains free. This opening is closed by a potshaped cover 8 of leather or similar absorbing material. The cover 8 is firmly secured between the lining I and the helmet 5 as shown in the drawing and the bottom thereof lies directly in front of the telephone system 3,'from which pass the sound wavesto the ear of the userthrough an 5 opening 9 arranged in the bottom of the cover 8. As will be seen the 'cover is so dimensioned that the ear with the helmet on the head of the user is completely enclosed by the cover and lies freely therein. Thereby the ear is sealed against any j noises which might interfere with a clear understanding without a pressure being exerted on the ear.
The shape of the casing las well as the arrangement of the receiver may be ditlerent from that shown and described. Also the cover may have another shape.
What is claimed is:
1. In combination, an aviators helmet having an opening therein, a telephone receiver, holding means for said receiver acoustically sealing one W side thereof, means attaching said holding means to said helmet, a cup-shaped member, an opening in the bottom of said member aligned with said receiver and means attaching the rim of said member to said helmet with the open end of said it member facing the interior of said helmet and the cup-shaped part exteriorly of said helmet whereby a receptacle is formed for the ear of the aviator surrounding the same and separated therefrom. I 29 2. In combination, an aviators helmet, a lining therein, said helmet and lining having, an .opening therein, a cup-shaped member having a flange at the open end thereof, said cup-shaped member extending exteriorlyvof said helmet; means hold- 25 ing said flange betweensaid lining and helmet, a casing, a receiver, means in said casing holding said receiver whereby said receiver is acoustically shielded at one side thereof, and melans attaching said casing to said helmet with the other side, of 30 said regeiver adjacent said cup-shaped member. said member having an opening aligned withsaid receiver.
3. In combination, a helmet member having an ear opening therein, a pair of internested members 35 attached to said helmet, the inner member being shaped to provide an ear receptaclesurrounding and separated from the ear of a wearer of said helmet and a receiver held between said internested members, said inner member having an 4 opening therein.
the wearer of said helmet, and a receiver between said members, said. outer member acoustically sealing said receiver to said helmet.