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| Number | Title | Issue Date |
| 7714700 | Ambient condition detector with selectable pitch alarm The pitch of tones within tonal patterns emitted by ambient condition detector units and systems in the alarm or testing state is not always optimum to be heard by a wide range of users. An ambient condition detector outputs an alarm comprising a tonal pattern where... | 05/11/2010 |
| 7605687 | Ambient condition detector with variable pitch alarm An ambient condition detector outputs an alarm comprising a tonal pattern comprising at least two distinctly different pitch tones in one embodiment of the invention. Another embodiment comprises a detector whereby a user can select a pitch tone to be output within ... | 10/20/2009 |
| 7605686 | Alerting system for a communication device An alerting system (202) for a communication device (100) is provided. The alerting system is designed to operate in a plurality of operating modes. The alerting system includes a transducer (204) and an electromechanical switch (106). Th... | 10/20/2009 |
| 7486173 | System and method for setting parameters from control panel Parameters defining operational characteristics of audible, visual or audible/visual alarm indicating output devices, can be transmitted to the respective devices from common output control circuitry to avoid having to set up the devices electromechanically in the f... | 02/03/2009 |
| 7369052 | Anti-theft alarm tag An anti-theft alarm tag comprises two parts (10,12) which shall be located on opposite sides of a product (11) with a pin (14) on one part (12) extending through the product and locked together with the other part (10). Said one pa... | 05/06/2008 |
| 7360294 | Method of assembling an inductive proximity sensor A method of assembling an inductive proximity sensor maintains inductive coil wound bobbins in fixed relation to an inductive core within a housing. The method includes configuring two inductive coil wound bobbins with an integral ledge cantilevered from an inside s... | 04/22/2008 |
| 7292136 | Audible signal device and machines using same An audible signal device which includes a DC to DC converter is provided. A group of work machines is further provided, including at least two work machines having electrical systems with different operating voltages. First and second audible signal devices are coup... | 11/06/2007 |
| 7227452 | Apparatus to deter birds with ultrasound Birds carry many parasites and other diseases, which pose a health risk to humans which come into contact with their habitat. However, ultrasonic waves agitate and deter birds and other pests from roosting in nearby areas. The disclosed device utilizes solar energy ... | 06/05/2007 |
| 7201996 | Sound generator for a portable device A sound generating device is mounted in a recess formed in a case, and a battery is mounted on the case. A pair of terminals are provided on the underside of the case. A pair of leads connect a pair of electrodes of the battery with the terminals. ... | 04/10/2007 |
| 7170385 | Inductive proximity sensor and method of assembling the same An inductive proximity sensor comprises: a housing including an opening on one side; an inductive core including two legs, each core leg including a foot portion; an inductive coil wound bobbin disposed about each leg of the core, each bobbin including an integral l... | 01/30/2007 |
| 7148789 | Handheld device having multiple localized force feedback An electronic device (100) comprises a housing (112), an input (118, 122) coupled mechanically to the housing for receiving data, an output (114, 118) coupled mechanically to the housing for presenting information to a user of the electro... | 12/12/2006 |
| 7093343 | Method of manufacturing an acoustic transducer An acoustic transducer design having a slotted oval-shaped shell and active transducer elements located on the inner surface of the shell is disclosed. The design provides a high power, ultra-low frequency oval projector having a number of applications, including un... | 08/22/2006 |
| 7088223 | Sound generator for a parking assistance system A sound generator, in particular for parking assistance systems for vehicles, has a housing (2) comprising a base part (4) and a top part (6), wherein the base part (4) defines a receiving space (8, 10), which can be covered by the... | 08/08/2006 |
| 7071816 | Audible alert device and method for the manufacture and programming of the same An audible alert device includes a pulse width modulated signal generator. The audible alert device and method for manufacturing the audible alert device also provides resonant frequency and decibel peaking capabilities. Resonant frequency and decibel peaking routin... | 07/04/2006 |
| 7038576 | Electropneumatic horn An electropneumatic acoustic horn is disclosed, comprising an electric compressor unit for generating compressed air and a sound wave generator comprising at least an acoustic chamber associated to at least a volute wound acoustic duct adapted to propagate the produ... | 05/02/2006 |
| 6809634 | Buzzer-driving apparatus A pulse signal, having a buzzer-driving frequency, for driving a buzzer (3) is generated by a free running timer of a timer management section of a microcomputer (1). The timer management section operates independently of software processing of the mic... | 10/26/2004 |
| 6809635 | Mobile terminal using a vibration motor as a loudspeaker and method of use thereof The present invention is a mobile terminal (102). The mobile terminal includes a vibration motor (108) which provides a silent vibration alert to a user of the mobile terminal during reception of incoming communications which include audio communicatio... | 10/26/2004 |
| 6710705 | Method and apparatus for pest deterrence A pest deterrent device attracts the attention of a pest with ultrasonic noise and then produces a series of flashes to drive off the pest. In one embodiment, the device continuously produces ultrasound, changing the ultrasound when a pest is detected. In another em... | 03/23/2004 |
| 6664892 | Device inventory by sound When a person first enters an unfamiliar work space, it is useful for that person to know what devices are present in the space and often the person will spend the first few minutes looking around, effectively carrying out an inventory of the devices pres... | 12/16/2003 |
| 6653934 | Electro-magnetic audio transducer for surface-mounted devices An electromagnetic audio transducer for SMD applications. The transducer comprises a lead frame with external terminals, which are formed into a predetermined shape. The transducer has a case with inside and outside surfaces, where the case is integrated ... | 11/25/2003 |
| 6617967 | Piezoelectric siren driver circuit A piezoelectric transducer driving circuit has a main oscillator stage, a buffer circuit, and a voltage-doubling circuit. The main oscillator stage includes a frequency-swept signal generator that can be configured to provide different outputs to the buff... | 09/09/2003 |
| 6617966 | Compound acoustic actuator drive circuit and portable information terminal In a signal generation circuit for a compound acoustic actuator that generates a sound and a vibration in response to a frequency of a signal input to the compound acoustic actuator, the signal generation circuit comprising a plurality of signal data stor... | 09/09/2003 |
| 6456193 | Controlling method and apparatus of constant-frequency sound-production of electrical horn A controlling method and apparatus of constant-frequency sound-production for an electric horn are described. These are achieved. And comprised by a monolithic-processor. It's characterized in that frequency pulse output from constant-frequency oscillator... | 09/24/2002 |
| 6342831 | Electronic apparatus Electronic apparatus incorporating a loudspeaker, wherein the loudspeaker comprises a bending wave panel member having a user-accessible surface, an electro-acoustic vibration exciter on the panel member to introduce bending wave energy into the panel mem... | 01/29/2002 |
| 6339368 | Circuit for automatically driving mechanical device at its resonance frequency A circuit for automatically driving a mechanical device at its resonance frequency is provided. To do so, the circuit detects non-resonance driving conditions of the mechanical device being coupled to and driven by such circuit. Based on such detection, t... | 01/15/2002 |
| 6317033 | Vehicle horn The present invention is structured so as to prevent a fixing part from becoming an obstacle when fixing a coil bobbin for a horn for a vehicle to a case. The structure of the present invention is achieved by forming a tubular through hole extending towar... | 11/13/2001 |
| 6310540 | Multiple signal audible oscillation generator A microcontroller is used to drive a piezoelectric transducer. Certain pins on the microcontroller are indicative of selection signals. The selector can be activated either by a user directly (e.g., by pushing buttons), by an offboard actuator (e.g., anot... | 10/30/2001 |
| 6288633 | Actuable audible display for bicycle handlebars An actuable audible display (10) for mounting on the handlebars (12) of a child's vehicle such as a bicycle includes a visual image (15) depicted on a plate-like member (16) affixed to the handlebars and an actuable sound unit (19) mounted on the back of ... | 09/11/2001 |
| 6259797 | Metal base design for a speaker A metal base assembly for speaker that combines with a magnetic circuit to produce a fluctuating magnetic field which drives an acoustic diaphragm into vibration to produce a warning alarm. The metal base assembly comprises a top pad, a middle pad, a bott... | 07/10/2001 |
| 6252496 | Animal warning alarm device An animal warning alarm device includes a housing having a hollow tube projecting forwardly therefrom and an electronic sonic generator attached to the housing for providing a sonic wave that is channeled out through the forward open end of the tube which... | 06/26/2001 |
| 6236305 | Interchangeable sound effect device An interchangeable sound effect device (1) that incorporates and plays sound effects that have been digitally recorded on interchangeable sound cartridges (4). This device (1) is designed to be used with entertainment and educational type products such as... | 05/22/2001 |
| 6188313 | Device for generating sound A device for regenerating powerful acoustic pressure comprises at least an arrangement for generating sound while utilizing the flextensional technique, i.e. having at least one surface element (2), the opposite ends (4, 5) of which are arranged to be inf... | 02/13/2001 |
| 6166623 | Modular alarm assembly A modular audible warning device includes a primary housing which houses the core components of an audible warning device: a transducer and control circuitry. In one embodiment of the invention, the primary housing is insertable within a variety of second... | 12/26/2000 |
| 6111497 | Buzzer with Zener diode in discharge path A relatively high voltage is developed across a buzzer by placing a resistance in the discharge path of an buzzer, e.g., by shunting one or more Zener diodes or LEDs across a switching transistor, the switching transistor being connected in series with th... | 08/29/2000 |
| 6081184 | Self-protected, low emission electronic device for driving a warning horn A self-protected, low emission electronic device for driving a warning horn includes a coil powered from a battery through a control push-button adapted for operation by a user and included in an electric connection between a terminal of the coil and the ... | 06/27/2000 |
| 6046670 | Interchangeable sound effect device An interchangeable sound effect device (1) which incorporates and plays sound effects that have been digitally recorded on interchangeable sound cartridges (4). This device (1) is designed to be used with entertainment and educational type products such a... | 04/04/2000 |
| 6016099 | Automatically active personal alert safety system A problem of accounting for firefighters at a fire scene and also assuring that a firefighter has his PASS device turned on is an ever pressing issue. A tally key and holder, each with an embedded magnet, are designed to magnetically infiltrate a reed swi... | 01/18/2000 |
| 5990784 | Schmitt trigger loud alarm with feedback An alarm system circuit comprises a logic array comprising a piezoelectric transducer driven by one or more Schmitt triggers. The logic array operates at substantially resonant frequency, and the circuit provides a feedback loop to sustain the oscillation... | 11/23/1999 |
| 5942815 | Programmable capacitive horn switch A flexible capacitor is used in a switch circuit arrangement for activating a vehicle horn. The switch circuit arrangement includes an astable circuit having a flexible capacitor. The astable circuit generates a signal having a frequency that varies in re... | 08/24/1999 |
| 5909169 | Electric bell having a mechanism for supporting electromagnetic unit An electric bell includes a base having two walls extended upward from the central portion for forming a casing. The walls each includes an upper portion having one or more projections. Two spring leaves are secured on the base. An electromagnetic unit is... | 06/01/1999 |