|Publication number||US1365249 A|
|Publication date||Jan 11, 1921|
|Filing date||Apr 3, 1920|
|Publication number||US 1365249 A, US 1365249A, US-A-1365249, US1365249 A, US1365249A|
|Export Citation||BiBTeX, EndNote, RefMan|
|Referenced by (3), Classifications (4)|
|External Links: USPTO, USPTO Assignment, Espacenet|
E. H. KOEHLER.
APPLICATION min APR. 3 1920.
Patented Jan. 11, 1921.
fwd/we MM I EDWARD H. KOEHLER, OF CHICAGO, ILLINOIS.
Specification of Letters Patent.
Patented Jan. 11, 1921.
Application filed April 3, 1920. Serial No. 371,152.05.
To all whom it may concern Be it known that I, EDWARD H. KoEHLnR, a citizen of the United States, residing at 536 Fullerton Parkway, Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Pl1onograph-Horns, of which the following is a specification, reference being had therein to the accompanying drawing.
My invention relates to phonograph horns, and its object is to improve the tone quality and increase the volume and eliminate the metallic character of tone. The inven tion consists in the matters hereinafter described and then pointed out in the claims.
In the accompanying drawing, Figure 1 is a side view of a phonograph panel horn showing the panel construction to better illustrate the features of my invention. Fig. 2 is the front view of a phonograph panel horn.
In the drawings the reference numeral 1 indicates the width of the panels, all of which are the same width and may be varied according to the size of the machine. The numeral 2 shows the manner in which the panels overlap each other, a distance of from :1 to 1 according to the size of the panels. The numeral 3 shows the open space between each panel.
The numeral 4 shows the thickness of the panels, all of which are the same and may be varied according to the size of the machine. The numeral 5 shows the plug which separates the panels, thus allowing each panel to vibrate independently of each other. There are two of these plugs glued between each panel, thus also serving to hold the panels together. These plugs are of wood, thick, wide and as deep as the panels overlap each other, which varies from 1} to 1 according to the size of the horn. The panels are also of wood.
The numeral 6 is the throat opening. Any suitable number of panels may be provided on each side of the horn, with the shortest panels adjacent the throat opening and the succeeding panels increasing in length to-- ward the mouth of the horn.
1. A. horn for phonographs and like instruments with wooden panels of equal width and increasing in length from the innermost set of four to the outermost set, with two wooden plugs between each panel set at such a distance apart so as to allow an opening between each panel.
2. An amplifier for phonographs comprising a series of transverse frame like sections in spaced relation.
3. An amplifier for phonographs and the like comprising a series of transverse frame like sections, adjacent sections being held in overlapping spaced relation by means of small filler blocks.
4. An' amplifier for phonographs and the like comprising a series of wooden transverse frame like sections increasing in cross sectional area toward the mouth of said amplifier, each of said sections being spaced from adjacent sections, and supported by small filler blocks, said blocks being inserted between the exterior face of a section and the interior face of the adjacent larger section.
EDWARD H. KOEHLER'.
Witnesses KATE THOMPSON, ERNEST BYTHEM.
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