|Publication number||US437602 A|
|Publication date||Sep 30, 1890|
|Publication number||US 437602 A, US 437602A, US-A-437602, US437602 A, US437602A|
|Inventors||Ferdinand P. Kaiser|
|Export Citation||BiBTeX, EndNote, RefMan|
|Referenced by (4), Classifications (1)|
|External Links: USPTO, USPTO Assignment, Espacenet|
I. P. KAISER.
No. 437,602. Patented Sept. 30, 1890.
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UNITED STATES PATENT OFFIoE.
FERDINAND P. KAISER, OF ST. LOUIS, MISSOURI.
SPECIFICATION forming part of Letters Yatent No. 437,602, dated September 30, 1890.
Application filed March 17, 1890. Serial No, 344,161. (No model.)
T0 (0% whom it may concern:
Be it known that I, FERDINAND P. KAISER, of the city of St. Louis, in the State of Missouri, have invented a certain new and useful Improvement in Ear-Muflles, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of thisspecification.
The object of this instrument is to prevent sound entering the car. It is specially intended for use by a person receiving a telephone-message, being placed upon one ear while the telephone-receiver is applied to the other. It is found that when one ear is muffled the eificiency of the other ear is increased, as the nervous energy is concentrated upon it. The device is supported entirely by the ear.
Figure I is an inside view of the device. Fig. II is a vertical section showing the de- Vice applied to the left car, which is shown in front view.
1 is a sheet of rubber, celluloid, or any other suitable material. This sheet is molded to fit and cover either the right or left car, as the case may be.
2 is a flange, which extends around the top and back of the sheet 1, and which extends around the rim 3 of the ear at the top and rear and engages on the said rim, so as to support the instrument upon the ear. The
part 4 of the edge between the ends of the flange 2 is curved inward, so as to lie against the cheek to check the entrance of sound to the orifice of the ear.
The orifice of the ear is closed by a plug 5,
which extends inward from the part or sheet 1. This plug is intended to be made of rubher or othersuitable flexible or inflexible ma- 4o terial and of such form as to substantially close the orifice of the car.
In some cases I attach to the part 1 a disk, fringe, or border (3, extending from the part 1 all around and curved inward, so that its edge 7 is in contact with the side of the head, as seen in Fig. II. In most cases the border 6 would not be required; but in cases where there is much noise or the listener is very sensitive this border will be found advan- 5o tageous.
I claim herein as new and of my invention 1. The conibinatioinin an ear-muffle, of the sheet 1, covering the ear, and the plug 5, entering the orifice of the ear, substantially as set forth.
2. The sheet 1, covering the ear and having a flange 2 engaging the rim of the ear, in combination with the plug 5, adapted to fit the orifice of the ear.
3. The combination of the sheet1,adapted to the outer side of the ear, the flange 2, adapted to engage the rim of the ear, and the border 6, extending from the sheet on all sides, substantially as and for the purpose set forth.
i. The combination, in an ear-Inuffie, of the sheet 1, carrying a plug 5 and havinga flange 2 and the border 6, all substantially as and for the purpose set forth.
FERDINAND P. KAISER. In presence of- THos. KNIGHT, E. S. KNIGHT.
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