US2509170A - Code practicing device - Google Patents

Description

y 23, 9 T. ROUSEY 2,509,170

CODE PRACTICING DEVICE Filed March 18, 1948 W mm unTiiggm INVENTOR.

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ATTORNEY Patented May 23, 1950 UNITED STATES 1 Claim. 1

The invention relates to a code practicing device and more particularly to a device for assisting in learning and/ or practicing the International Morse Code used in radio-telegraphy.

Unlike the American Morse Code which is produced by a click-clack sound, the International Morse Code uses a sound that has a continuous musical note for producing the code designations. I have found that a whistle that produces sound wave vibrations of eight hundred to twelve hundred cycles per second will closely simulate the actual sound of the radio-telegraphy (International Morse Code) as heard on the radio airwaves. The object of this invention is to use a whistle of the type above described in a code practicing or learning device to produce a device of very simple and inexpensive construction and one that does not require the use of electricity or other complicated and costly electrical equipment that has formerly been used for this purpose.

The invention further consists in the several features hereinafter set forth and more particularly described by claim at the conclusion hereof.

In the drawings:

Fig. 1 is an elevation view of a device embodying the invention, parts being broken away;

Fig. 2 is a vertical sectional view taken on the line 2-2 of Fig. 1;

Fig. 3 is a vertical sectional view taken on the line 33 of Fig. 2.

My code practicing device includes a whistle 5 and a bellows 6 controlled and operated by the operator for actuating said whistle.

As previously noted, the whistle 5 which may be of any suitable construction should be one that will produce a musical note or sound waves having vibrations of five hundred cycles per second, more or less, to simulate the actual sound of the International Morse Code note as heard on the radio air-waves. As shown, the whistle 5 comprises a sound box suitably formed of sheet metal and having oppositely disposed spaced openings 1 in the top and bottom thereof through which air is drawn and expelled, and to prevent this whistle from operating to produce a note on the intake of air, a plate 8 of sheet metal is secured at its corners to the top of the whistle in spaced relation to said top and the opening I therein.

The bellows 6 may be of any suitable construction and is preferably formed of two rectangular sections 9 of flexible material, such as cardboard or other suitable material stiff enough to be self-sustaining, whose peripheral edges H] are secured together by a suitable adhesive II, the top section having an opening I 2 to the underside of the sides of which the whistle 5 is secured and mounted at said opening in any suitable manner as by a suitable adhesive l3.

To move the bellows to a distended position spring members l4 oij flat spring steel and of bowed form are mounted in the bellows casing in spaced relation and engage opposite sides of said casing. The spring members [4 may be secured together by a cross portion or member 15 and be anchored to the top of said casing by rivets 16.

A key 11 of wood, plastic, or other suitable material may be mounted on the top section and be secured thereto by rivets l6, and to strengthen the casin at this point a piece of sheet metal 19 is interposed between the key I1 and the top of the casing through which the rivets 18 also pass, which piece I9 is preferably extended beyond said key and is secured by rivets 20 to a portion of the cross member l5, so that downward pres sure by the operator on the key I! acts to defiate the bellows and compress the springs I4 and produce a rush or blast of air through the whistle 5 to sound the code note, and release of pressure on the key permits the springs I 4 to return the bellows to a distended position during which time air is drawn into the bellows through the whistle which, however, because of its inlet being restricted by the plate 8 does not then give off a code note.

From the above it will be noted that my device is very simple and of inexpensive construction and may be used for practicing and learning the International Morse Code by service personnel and young boys and others who would be interested in learning the code.

I desire it to be understood that this invention is not to be limited to any particular form or arrangement of parts except in so far as such limitations are included in the claim.

What I claim as my invention is:

In a device for teaching International Morse Code, the combination of a whistle having a note to simulate the wave sound used in International Morse Code, a bellows for operating said whistle formed of a pair of flexible members secured together along their peripheral edges, a pair of bowed fiat spring members disposed within said bellows to act to move the same to a distended position, and an operator's key connected with the top of the bellows and with said spring members for operating said bellows.

THOMAS L. ROUSEY.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 52,481 Wilson Feb. 6, 1866 79,538 Anderson July '7, 1868 435,363 Millbourn Aug. 26, 1890 494,366 Callahan Mar. 28, 1893 1,116,756 Stuart Nov. 10, 1919 1,796,989 Hanselmann Mar. 1'7, 1931 2,011,287 Kelley Aug. 13, 1935 2,140,124 Banner et al. Dec. 13, 1938

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