Abstract: A notification device includes: a notification-sound output portion provided in a vehicle and configured to output a notification sound toward the outside of the vehicle; a notification display portion provided in the vehicle and configured to output a notification display toward the outside of the vehicle; a notification controlling portion configured to control the notification sound of the notification-sound output portion and the notification display of the notification display portion; and a stop-state determination portion configured to determine whether the vehicle during the automatic driving enters a stop state or not. When the stop-state determination portion determines that the vehicle during the automatic driving enters the stop state, the notification controlling portion outputs a stop-time notification sound as the notification sound by the notification-sound output portion and outputs a stop-time notification display as the notification display by the notification display portion.

Abstract: A notification device includes: a notification-sound output portion provided in a vehicle and configured to output a notification sound toward the outside of the vehicle; a notification display portion provided in the vehicle and configured to output a notification display toward the outside of the vehicle; a notification controlling portion configured to control the notification sound of the notification-sound output portion and the notification display of the notification display portion; and a stop-state determination portion configured to determine whether the vehicle during the automatic driving enters a stop state or not. When the stop-state determination portion determines that the vehicle during the automatic driving enters the stop state, the notification controlling portion outputs a stop-time notification sound as the notification sound by the notification-sound output portion and outputs a stop-time notification display as the notification display by the notification display portion.

Abstract: The present invention provides a vehicle comprising: a detection unit configured to detect an obstacle invading a predetermined region in front of a self-vehicle; and an output control unit configured to control output of an alarm to the obstacle in a case where the obstacle is detected by the detection unit.

Abstract: Disclosed is an apparatus and method for providing asymmetric oscillations to a container. The container may include a fluid, a particle, and/or a gas. A vibration driver attached to the container provides asymmetric oscillations. A controller connected to the vibration driver controls an amplitude, frequency, and shape of the asymmetric oscillations. An amplifier amplifies the asymmetric oscillations in response to the controller. A sensor disposed on the vibration driver provides feedback to the controller.

Abstract: A centrifugal pump comprises a pump assembly, through which a fluid can be impelled. The pump assembly includes a fluid inlet and a fluid outlet, a fluid casing, and an impellor positioned within the fluid casing, the impellor being driven by a power source and being operable to generate fluid flow within the fluid casing from the fluid inlet to the fluid outlet. The pump assembly also includes a volute area formed on a periphery of the fluid casing, the volute area being operable to receive fluid pressurized by flow induced by the impellor. A pitot tube is positioned within the volute area, the pitot tube being operable to receive pressurized fluid from the volute area and pass the fluid through an outlet having an expanding geometry that increases the flow rate of the fluid as it passes through the outlet.

Abstract: A preferred siren including a base having a central axis and a peripheral wall circumscribed about the central axis to define an internal chamber. The peripheral wall includes a plurality of apertures in communication with the internal chamber. A rotor is disposed within the chamber and centrally aligned with the axis. The rotor includes a plurality of spaced apart fins radially disposed about the axis, each of the plurality of fins having an outermost portion at a peripheral edge of the rotor and an innermost portion located between the axis and the peripheral edge. An external housing cooperates with the base to enclose the rotor within the internal chamber, the external housing including a first plurality of ports and a second plurality of ports, the first and second plurality of ports being in fluid communication with the internal chamber of the base.

Abstract: A preferred siren including a base having a central axis and a peripheral wall circumscribed about the central axis to define an internal chamber. The peripheral wall includes a plurality of apertures in communication with the internal chamber. A rotor is disposed within the chamber and centrally aligned with the axis. The rotor includes a plurality of spaced apart fins radially disposed about the axis, each of the plurality of fins having an outermost portion at a peripheral edge of the rotor and an innermost portion located between the axis and the peripheral edge. An external housing cooperates with the base to enclose the rotor within the internal chamber, the external housing including a first plurality of ports and a second plurality of ports, the first and second plurality of ports being in fluid communication with the internal chamber of the base.

Abstract: A small light mechanical siren for mobile emergency equipment which utilize spiral rebound ramps in the rotor to produce a loud penetrating square form spiral sound wave, enabling effective warning without contributing to noise pollution.

Abstract: A small light mechanical siren for mobile emergency equipment which utilize spiral rebound ramps in the rotor to produce a loud penetrating square form spiral sound wave enabling effective warning without contributing to noise pollution.

Abstract: An audio signal is generated that sweeps from a lower frequency to a higher frequency in a substantially linear function. The circuit used to produce this sweeping audio frequency has a stable power supply, a square wave oscillator, a ramp generator, a voltage controlled oscillator, a drive circuit and an audio circuit. The square wave generator is composed of logic gates that generate a square wave with near instantaneous rising and falling edges. The ramp generator creates a sweep drive signal that is a substantially linear triangular waveform.

Abstract: An emergency response vehicle such as an ambulance is provided with a warning unit that provides a visual and audible warning signal. The warning unit is mounted in a recess or cutout in the hood which covers the engine compartment of the vehicle. This positioning of the warning unit avoids blockage of the air flow through the radiator required for cooling of the vehicle engine. Brackets or other suitable devices are used to mount the warning unit, preferably to a wall such as a radiator support, so that the warning unit remains stationary during opening and closing of the hood. The wall also serves to block rearward passage of the noise generated by the warning unit.

Abstract: A sound focusing device for use with a siren. The device is comprised of an adjustable baffle or damper reducing the velocity of air or sound eminating from a siren. The baffle or damper is positioned internal to the siren. A conical sound focusing trumpet is positioned co-axially and external to the siren. The baffle or damper is made up of two complementary disks forming at least one defined opening therein. The baffle or damper is selectively adjustable.

Abstract: A light bar system for a motor vehicle including a plurality of forward-facing lights and a plurality of rear-facing lights transversely spaced on a bar across a motor vehicle, sequentially operating the forward-facing lights in a pattern moving from one light to the next light in a pattern in a preferred direction, and simultaneously operating the rear-facing lights in a pattern moving from one light to the next light in a pattern in the direction opposite that of the forward-facing lights; and sequentially operating the lights with a frequency modulating ramp generator optionally driving an acoustic siren and producing an electrical ramp signal of changing frequency, including a means for selecting a series of time-spaced frequencies in the changing frequency ramp signal, and a means for operating at least one specific forward-facing light and one specific rear-facing light in the light bar at each selected frequency of the ramp signal.

Abstract: A distinguishable siren sound pattern is produced within an emergency vehicle by automatically alternating the siren sound pattern from among a plurality of distinguishable types of separate siren sound patterns. One of said plurality of distinguishable type of sound patterns may be continuously generated or alternatively through momentary contact in a horn switch, automatically swept among a plurality of the distinguishable siren sound patterns according to a predetermined pattern. In the illustrated embodiment wail, yelp, high-low or hetro siren sound patterns are producible either through microprocessor control or through discretely switched waveform generators. The siren sound pattern is automatically alternated between wail and yelp or between high-low and hetro according to manually switch configurations and momentary activation of a horn ring switch.

Abstract: An improved outdoor warning siren comprising an electromechanical siren together with a multi-segment horn which effects an exceptionally smooth transition from a small high pressure area at the horn inlet to a larger low pressure area at the horn outlet thereby producing increased sound output with reduced power requirements.

Abstract: A light bar system for a motor vehicle includes a plurality of forward-facing lights and a plurality of rear-facing lights transversely spaced on a bar across a motor vehicle, the forward-facing lights sequentially operated in a pattern moving from one light to the next light in a pattern in a preferred direction, and the rear-facing lights simultaneously operated in a pattern moving from one light to the next light in a pattern in the direction opposite the forward-facing lights.The lights are sequentially operated in patterns generated from varying audio frequencies of a siren signal generator producing wail or yelp signals of changing frequency, wherein selected lights are switched on at selected frequency bands in the changing frequency siren signal, and at least one specific forward-facing light and one specific rear-facing light in the light bar are energized at each selected frequency band.

Abstract: A siren comprises a compressed air supply which is deflected by stationary deflectors to exit radially through stator ports. A rotor with spaced ports rotates between the stator and deflector thereby opening and closing the stator ports. Stationary vanes are disposed at circumferentially spaced locations, and constitute together with the deflector plate and stator and rotor housing, plenums. There are fewer rotor ports than stator ports, which generates an out-of-phase acoustical pattern which creates an acoustic combination from the stator ports of an acoustic output at a distance from the siren which is more uniform spatially. The thermoplastic seal between the stator and the rotor has minimal clearance under operating conditions having been run-in and plastically deformed at a temperature higher than for normal operation.

Abstract: A pneumatic sweep generator for use as an audio source in tests near vocal frequency ranges. A horn, whose volume may be controlled by air pressure and whose tone may be controlled by air velocity, is connected to an air supply in a dual-circuit arrangement. Mechanical control devices, such as manual and pressure release valves, are located within the circuit to provide for tone and volume control. A reciprocating air cylinder continuously varies the air velocity within the horn to sweep the frequencies in an adjustable manner. Electromagnetic interference is totally eliminated by a complete absence of electrical devices in either the device or in necessary controls.

Abstract: An electric alarm siren of low power has a relatively high sound intensity and a good timbre due to a runner with arch-shaped blades.The electric alarm siren includes a central part which is divided by a partition wall into a driving part with a built-in motor being enclosed in a compact whole by a cover, and into an acoustical part comprising the runner and a front part.

Abstract: A siren comprises a compressed air supply which is deflected by stationary deflectors to exit radially through stator ports. A rotor with spaced ports rotates between the stator and deflector thereby opening and closing the stator ports. Stationary vanes are disposed at circumferentially spaced locations, and constitute together with the deflector plate and stator and rotor housing, plenums. There are fewer rotor ports than stator ports, which generates an out-of-phase acoustical pattern which creates an acoustic combination from the stator ports of an acoustic output at a distance from the siren which is more uniform spatially. The thermoplastic seal between the stator and the rotor has minimal clearance under operating conditions having been run-in and plastically deformed at a temperature higher than for normal operation.

Abstract: A siren comprises a compressed air supply which is deflected by stationary deflectors to exit radially through stator ports. A rotor with spaced ports rotates between the stator and deflector thereby opening and closing the stator ports. Stationary vanes are disposed at circumferentially spaced locations, and constitute together with the deflector plate and stator and rotor housing, plenums. There are fewer rotor ports than stator ports, which generates an out-of-phase acoustical pattern which creates an acoustic combination from the stator ports of an acoustic output at a distance from the siren which is more uniform spatially. The thermoplastic seal between the stator and the rotor has minimal clearance under operating conditions havign been run-in and plastically deformed at a temperature higher than for normal operation.

Abstract: A siren comprises a compressed air supply which is deflected by stationary deflectors to exit radially through stator ports. A rotor with spaced ports rotates between the stator and deflector thereby opening and closing the stator ports. Stationary vanes are disposed at circumferentially spaced locations, and constitute together with the deflector plate and stator and rotor housing, plenums. There are fewer rotor ports than stator ports, which generates an out-of-phase acoustical pattern which creates an acoustic combination from the stator ports of an acoustic output at a distance from the siren which is more uniform spatially. The thermoplastic seal between the stator and the rotor has minimal clearance under operating conditions having been run-in and plastically deformed at a temperature higher than for normal operation.

Abstract: An improved siren including means for producing and directing sound energy against a rotatable reflector which directs the sound waves out from the siren in a generally horizontal direction and which due to rotation of the reflector about a vertical axis causes such sound waves to be directed in all horizontal directions. One embodiment includes rotor and stator means which create sound energy that is directed generally downwardly in the manner of a ring radiator, together with a reflector mounted beneath the rotor and stator for rotation about a generally vertical axis, the reflector being tilted relative to its axis of rotation to intercept the downwardly directed sound waves and direct them out horizontally thereby providing a directional siren which covers a 360 degree area due to rotation of the reflector.

Abstract: An improved speaker grille for incorporation in the housing of a light/siren assembly of a type which is mounted across the roof of a police car or other emergency vehicle, the improved grille being designed to significantly reduce the drag coefficient of the light/siren assembly due to the unique location of the grille openings.

Abstract: A siren for an alarm adapted to be driven by a fractional horsepower motor and provided with a cup shaped rotor cooperating with a stator provided with perforations in the cylindrical flange thereof, and a drawn, cup-shaped screen or grille seated over the inlet to said stator and having a cylindrical flange extending over the perforations of the stator but spaced outwardly therefrom, the base of the screen being engaged on the stator rim. The intake air flow of the siren is restricted by the perforations of the screen which increases the velocity of the intake air, thereby increasing the efficiency of the siren which enables reduction of the current usage requirements. The harmonics of the output sound are increased by the perforated cylindrical flange of the screen thereby increasing the volume and pitch of the emitted sound.

Abstract: 1. An acoustical source for minesweeping operations comprising a stator ing outer and inner surfaces which are surfaces of revolution and an open port connecting said outer and inner surfaces, an external rotor adapted to be rotated around said outer surface of said stator and having outer and inner surfaces which are surfaces of revolution with at least one open port of non-constant cross-section connecting said inner and outer surfaces, said port being substantially larger in cross-sectional area at said inner surface than its cross-sectional area at said outer surface and, said rotor having appreciably greater thickness between said inner and outer surfaces than said stator; and drive means for rotating said rotor at a predetermined speed.

Abstract: A siren for an alarm adapted to be driven by a fractional horsepower motor comprising a cup-shaped rotor cooperating with a stator having rectangular perforations in a cylindrical flange, the cup-shaped rotor and the stator being both formed as stampings, the rotor having an integral base plate staked to a hub, the base plate having a plurality of shear-formed upstanding vanes of identical irregular polygonal configuration circumferentially arranged around the center of the base plate, the cylindrical wall of the rotor having rectangular perforations equal in number to the number of vanes and each vane having a perforation adjacent thereto at the identical respective location.