US3924560A - Whistle - Google Patents

Abstract

A whistle for simulating bird calls having a water-filled vertically elongated chamber which is closed at its upper end by a perforated cap to enable exhaust of air from the chamber, and a whistle tube extending through the cap, having its lower end immersed in the water in the chamber and having a mouth piece at its upper end.

Description

United States Patent [191 Kaftan Dec. 9, 1975 WHISTLE [76] Inventor: Alojz Karol Kaftan, 7531 Elwell St.,

Burnaby, British Columbia, Canada [22] Filed: Sept. 30, 1974 [21] Appl. No.: 510,425

[52] US. Cl. 116/140; 46/179; 84/330 [51] Int. Cl. G10K 5/00 [58] Field of Search 116/140, 137 R, 24;

[56] References Cited UNITED STATES PATENTS 232,075 9/1880 Secor 46/179 FOREIGN PATENTS OR APPLICATIONS 312,598 11/1933 Italy 46/179 17,349 2/1882 Germany 46/179 Primary ExaminerDonald O. Woodiel Assistant Examiner-Marcus S. Rasco Attorney, Agent, or Firm-Carver and Company [57] ABSTRACT A whistle for simulating bird calls having a water-filled vertically elongated chamber which is closed at its upper end by a perforated cap to enable exhaust of air from the chamber, and a whistle tube extending through the cap, having its lower end immersed in the water in the chamber and having a mouth piece at its upper end.

3 Claims, 3 Drawing Figures U.S. Patent Dec. 9, 1975 3,924,560

WHISTLE BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to whistles and in particular to whistles of the kind which simulate the call of a bird.

2. Prior Art In whistles of the type which produce a trilling sound when blown, it is common to use some means to alter the configuration of the tube below the whistle opening thereby varying the lenght of the column of air, and hence, obtaining pitch alteration. In some whistles a ball or pea is inserted in the sound chamber so that as the ball moves, vibrating the column of air is affected.

In other whistles of this type, the end of the whistles tube is closed by a fluid, alteration of level of which alters the length of the column of air in the tube and effecting a change in pitch. In whistles of this latter type, the lower end of the tube is usually immersed in a body of water so that, as the whistle is blown, air bubbles out of the lower end so that the level of water fluctuates rapidly and provides a pitch fluctuation, the resulting tone closely simulating the trill of a bird.

In whistles of the last mentioned type, the end of the tube which is immersed in the water usually terminates in a square cut end which results in a trilling whistle which is more or less of a uniform nature and which therefore is not an exact duplication of the nonuniform warble of a bird.

SUMMARY OF THE INVENTION The present invention provides a whistle of the water type which more closely simulates a birds warble than conventional whistles of this type.

The whistle of the present invention is also relatively inexpensive to produce from many known materials.

The whistle of the present invention has a chamber which is adapted to be filled with water and which is closed by a perforated cap. A pipe having a mouth piece at the upper end extends through the cap and is immersed at its lower end in the water. The lower end, in one embodiment of the invention is bias cut, and in another embodiment of the invention has a plurality of vertically spaced holes.

A detailed description following, related to the drawings, gives exemplification of apparatus according to the invention which, however, is capable of expression in means other than those particularly described and illustrated.

DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view of the whistle of the invention.

FIG. 2 is a central sectional side view of the whistle.

FIG. 3 is a central sectional view of another embodiment of the whistle of the invention.

DETAILED DESCRIPTION Referring to the drawings and in particular to FIGS. 1 and 2, there is illustrated one embodiment of the whistle of the invention.

Whistle 10 has a cylindrical chamber 11 which is open at its upper end and closed by a cap 13 having an opening 14. A pipe 15 extends through the cap and is soldered thereto and extends at its lower end 16 to near the bottom of the chamber. At its upper end 17 the 2 tube is formed as a whistle having a mouth piece 19 and a whistle opening 21. As seen in FIG. 2 the lower end of the tube is bia cut, approximately at a 45 angle, so that one side of the opening is higher than the other side.

The chamber is, in use, partially filled with water to a level above the lower open end of the tube so that when air is blown into the mouth piece bubbles issue from the lower open end and air blown into the chamber exhausts through the opening in the cap.

As with all whistles the length of the sound chamber, that is the length from the whistle opening to the open end of the tube, determines the length of the column of vibrating air in the tube, the pitch of the whistle tone depending upon the length of the vibrating air column. Due to the bubbling action, when the whistle is blown, the level of water in the tube fluctuates resulting in fluctuation of the vibrating column of air which in turn causes a variation of pitch.

It is seen that, with the lower end of the tube being bias cut average liquid level in the tube will vary considerably depending on the air pressure so that it is possible to obtain wide variations in pitch by blowing softly or by blowing very hard.

Another embodiment 30 of the invention is shown in FIG. 3.

Whistle 30 has a water chamber 31 and a cap 32 which are the same as chamber 11 and cap 13 of whistle 10. Whistle 30 also has a tube 33 with a mouth piece 34 at its upper end which extends at its lower end 35 to near the bottom of the chamber. Whistle 30 however, has a plurality of vertically spaced openings, severally 36, which extend upwards from near the lower end thereof and which are normally immersed in the water within the chamber. The openings, it is seen, increase in diameter, from top to bottom.

Variation in pitch is more pronounced in whistle 30 than in whistle 10. When only sufficient air is blown into the tube to result in bubbles issuing from the upper one of the holes, the level of water inside of the tube will not fall below the lower edge of the upper hole. With increasing air injected into the tube so that air bubbles issue from the lower holes, the level of the water inside the tube is correspondingly lowered so as to alter the pitch of the whistle. With variations in air pressure, therefore, wide variations in pitch can be obtained.

I claim:

1. A whistle comprising:

a. a chamber open at its upper end adapted to contain water,

b. a perforated cap closing the upper end of the chamber,

c. a tube extending through the cap and having the lower end which is bias cut immersed in the water in the chamber,

(1. mouth piece and whistle opening at the upper end of the tube.

2. A whistle as claimed in claim 1 including a plurality of vertically spaced openings formed in the lower immersed portion of the tube. a

3. A whistle as claimed in claim 2 in which the diameter of the openings vary, increasing in diameter from the upper opening to the lower opening.

Claims (3)

1. A whistle comprising: a. a chamber open at its upper end adapted to contain water, b. a perforated cap closing the upper end of the chamber, c. a tube extending through the cap and having the lower end which is bias cut immersed in the water in the chamber, d. mouth piece and whistle opening at the upper end of the tube.

2. A whistle as claimed in claim 1 including a plurality of vertically spaced openings formed in the lower immersed portion of the tube.

3. A whistle as claimed in claim 2 in which the diameter of the openings vary, increasing in diameter from the upper opening to the lower opening.

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