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| Number | Title | Issue Date |
| 6975213 | Whistle with light emitting device A whistle has a whistle member having a mouthpiece at a front thereof, a chamber therein, a passage communicated with the chamber, and an outlet at a sidewall of the chamber, and a light emitting device provided on the whistle member, which has a lamp, a battery and... | 12/13/2005 |
| 6252495 | Selector device A selector device which can select a target storage location only with a simple sound without visually confirming displayed contents. The selector device has a memory which can store stored information respectively at a plurality of storage locations. Spe... | 06/26/2001 |
| 6130605 | Vehicle security system with multi-sound pattern alarm and associated methods A vehicle security system includes an audible alarm indicator, and a controller to generate an alarm indication comprising a plurality of distinguishable sound patterns. The sound patterns overlap in time yet are audibly distinguishable from one another t... | 10/10/2000 |
| 5847648 | Alarm and intermittent alert system for vehicle operation A standard digital display alarm clock is provided which is driven by a 1.5 volt DC power source. A two-tone alarm device, whose sound level is adjustable from 60 dB to 100 dB, is electrically wired to the clock and sounds when the clock attains a predete... | 12/08/1998 |
| 5825280 | Portable safety light and audible signal apparatus A portable safety light and audible signal apparatus for placement in proximity to a building exit, to guide one or more fire fighters and emergency personnel to the exit during conditions of intense smoke and heat. The portable safety light and audible s... | 10/20/1998 |
| 5587705 | Multiple alert smoke detector The battery powered smoke detector of the present invention is designed to provide an early warning of the presence of an environmental condition of fire or smoke to persons in remote areas of a building with respect to the location of the environmental c... | 12/24/1996 |
| 5477205 | Combination outside light and audible/visual alarm An alarm system incorporates a three-position wall switch which replaces a conventional two position switch, connected in circuit with a conventional exterior light fixture. The conventional light bulb in the exterior fixture is replaced by an adapter to ... | 12/19/1995 |
| 5165107 | Electronic delay timer and alarm system A time delay and alarm system is provided to ensure safe operation of periodically activated apparatus having potentially dangerous moving parts. The system preferably employs a 555 type integrated timer circuit, a horn, and a pulse generator which causes... | 11/17/1992 |
| 5012221 | Emergency vehicle audible warning system and method An emergency vehicle audible warning system and method for improving emergency vehicle mission effectiveness and reducing the undesirable side effects of emergency vehicle audible warning systems. The audible warning system projects different selectable s... | 04/30/1991 |
| 4686504 | Pet operable annunciator An annunciator or signal which can be mounted adjacent a door and actuated by a pet to signal its desire to be let in or out includes a housing with an opening in the lower front thereof and with a lever projecting outwardly through the opening. When a pe... | 08/11/1987 |
| 4633515 | Emergency broadcast alert detector An emergency broadcast alert detector having a radio receiver scanning among several predetermined frequencies. The audio output of the radio receiver is connected to a noise detector that allows scanning to continue as long as noise indicative of no sign... | 12/30/1986 |
| 4555690 | Warning signal generating device for vehicle An oscillator and frequency divider provide a plurality of different frequency signals in response to any indication of vehicle abnormality. A plurality of switches indicate vehicle status such as a door, ignition and the like. A gate circuit having a plu... | 11/26/1985 |
| 4523058 | Ringer signal wave shaping circuit Improved ringer signal circuitry in a telephone handset modifies the leading edge of the ringer signal envelope causing ringer volume to gradually increase, over a period of time, to its maximum value.... | 06/11/1985 |
| 4276542 | Alarm system for dwellings An emergency signaling system using the existing two-wire circuit (10) between a switch assembly (15) located within a dwelling and an externally mounted lamp housing (20) includes a switch (25) having an "off" position (27), a "normally on" position (28)... | 06/30/1981 |
| 4196415 | Automotive turn signal flasher unit having integral acoustic signal means An automotive turn-signal flasher unit in which an astable transistor multivibrator periodically switches a flashing circuit through a switching relay is disclosed. The switching relay is formed as an electro-mechanical buzzer and thereby simultaneously p... | 04/01/1980 |
| 4074225 | Emergency detection alarm and evacuation system An emergency detection alarm and evacuation system adapted for use in a multi-storied building comprises a plurality of spatially distributed fire/smoke detectors and a plurality of exit signalling units respectively located adjacent the emergency exit do... | 02/14/1978 |
| 4057769 | Circuit for generating two distinctive tone bursts with exponentially decaying envelopes An electrical signal generator comprises an electric wave oscillator for producing oscillations at one or other of two predetermined frequencies, an attenuator device for attenuating oscillations produced by the oscillator in a manner which varies over a ... | 11/08/1977 |
