Die vorliegende Erfindung betrifft eine Trillerpfeife (10, 30) mit einem Mundstück (11, 31), einem Resonanzkörper (12, 32) und einer Luftaustrittsöffnung (33), wobei sie mit einem Flaschenöffner (20, 40) versehen ist.

A whistle (1), particularly a sports whistle, which is generally in the shape of a mandolin and has two whistle element sound chambers (2,3) arranged side-by-side and each having a cross section which is asymmetrical, preferably part-circular and part square. The sound chambers (2,3) are arranged so that the blowing pressure required to generate a sound pressure level of 90DbA and a maximum frequency of about 3.9KHz is only 0.5 p.s.i. The sound chambers (2,3) are separated from one another at each air vent (4,5) by a fin (F) of generally narrow width, and the entrance to each sound chamber is defined in part by a respective inclined inner wall (10,11) near the central longitudinal axis of the whistle.

A multi-function handheld device includes a casing unit 10, a torch unit 30, a mirror piece 40, a magnifying lens piece 50, a thermometer 60, and a compass 70. The casing unit 10 includes lower and upper casing members 11, 12. Rear casing parts 112, 122 of the casing members 11, 12 cooperatively confine an air inlet 161. The rear casing part 112 of the lower casing member 11 is further formed with an air outlet 162 to permit generation of a whistling sound output. Front casing parts 113, 123 of the casing members 11, 12 are spaced apart so as to define a receiving slit 171 for mounting the mirror and lens pieces 40, 50 pivotally therein. The casing unit 10 further has receiving cavities 192, 191 for mounting the thermometer 60 and the compass 70 respectively therein. The torch unit 30 is mounted in torch receiving chamber 1231 of the front casing part 123 of the upper casing member 12, and includes a press member 135 that is operable to make electrical connection between a lamp member 32 and a battery set 31.

Die Neuerung betrifft einen Pfeifenkörper aus zwei Formhälften, wobei mindestens eine Formhälfte 2, 3 einen Reflektor 4 aufweist.

A whistle (1), particularly a sports whistle, which is generally in the shape of a mandolin and has two whistle element sound chambers (2,3) arranged side-by-side and each having a cross section which is asymmetrical, preferably part-circular and part square. The sound chambers (2,3) are arranged so that the blowing pressure required to generate a sound pressure level of 90DbA and a maximum frequency of about 3.9KHz is only 0.5 p.s.i. The sound chambers (2,3) are separated from one another at each air vent (4,5) by a fin (F) of generally narrow width, and the entrance to each sound chamber is defined in part by a respective inclined inner wall (10,11) near the central longitudinal axis of the whistle.

A combination whistle comprising a body (1) provided at each end with a mouthpiece (3',6) having an air passage which communicates with a sound chamber (4,5), the chambers each being provided with a vent (V₁, V₂) in which is located an air splitter arranged so that air blown into the chamber through the associated mouthpiece is directed to the air splitter. The two vents (V₁,V₂) open at opposite sides of the body (1) so that the whistle can be blown from either end with the associated air vent exhausting in an upward direction without the need when changing ends to turn the whistle about a vertical axis. One of the sound chambers (5) contains a pea and is provided with a protuberance (3c) arranged to project into the associated vent (V₂) to prevent the pea becoming stuck in the vent. This chamber is of conical shape at one end.

An apparatus for generating a noise sound, which is equipped in industrial electric cars with little or no driving sound and generates an appropriate amount of noise sound so that the nearby cars or pedestrians can notice their approch in a narrow pathway or stock room. The apparatus has a cornical air collector (1) installed in the car, a shutter (5) installed rotatably in the air collector (1) and controls the flow amount of air passing through the air collector (1), and a U-shaped tube (4) installed apart by a predetermined distance from a small diameter portion (9) of the air collector (1) and generates the noise sound by the air discharged from the air collector.

The invention provides a new whistle, intended for sports referees, and for small boat emergency use, where a loud piercing sound is required without the possibility of loss of sound by "over-blowing" or by sticking of the freely-moving ball used in conventional whistles. The profile of the new whistle preferably is of flat-topped "mandolin" shape in side elevation, so that it is familiar and readily acceptable by established users, and yet includes three separate fipple-type whistle elements in a single whistle body, each with its own air column chamber (24, 26, 28) and vibration-producing knife edge (24a, 26a, 28a), at least two of which chambers are of slightly different lengths, so as to produce complex harmonics and beats that increase the piercing quality and audibility of the sound. This is done by providing two elements (24, 26) side-by-side and parallel to one another, with the third also parallel and below (or above in an inverted shape) the other two protruding into the space between them. The body is provided with a rearwardly-­ protruding boss (18) into which the third column (28) extends, so that its knife edge (28a) can be set back from the others to retain the desired side profile, and yet it can be the longest of the three. The whistle is made as a three-part (32, 34, 38) moulding, two (34, 38) of which fit within the third (32), the moulding parts providing different parts of the three element chambers (24, 26, 28), their knife edges (24a, 26a, 28a), air-directing passages (24c, 26c, 28c) and the boss (18), so that all three parts can be moulded without the use of complex moulds and the whistle is complete when the three are assembled together.

The invention relates to a whistling device (1) comprising a rigid thin plate (2) folded to form two segments having an acute angle between them. Each of the segments has an aperture (3) located substantially opposite the other aperture. The whistling device is adapted to be placed in the mouth and produce a shrill sound when air is blown therethrough.

The invention relates to a whistling device (1) comprising a rigid thin plate (2) folded to form two segments having an acute angle between them. Each of the segments has an aperture (3) located substantially opposite the other aperture. The whistling device is adapted to be placed in the mouth and produce a shrill sound when air is blown therethrough.