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A method for inducing cats to exercise consists of directing a beam of invisible light produced by a hand-held laser apparatus onto the floor or wall.
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| Number | Title | Issue Date |
| 7708112 | Waveguide phase plug An improved horn for a compression driver which has an interior foam plug for reducing the amplitude of unwanted non-fundamental wave propagation and better control over the sound radiation pattern of the device. ... | 05/04/2010 |
| 7387079 | Automatic horn shutter A horn assembly is disclosed. The horn assembly includes a shutter than can cooperate with a horn valve. The shutter disposed on an end portion of the horn assembly can help seal the horn assembly and prevent moisture, rain or debris from entering the interior of th... | 06/17/2008 |
| 7278513 | Internal lens system for loudspeaker waveguides This invention provides a lens system for a loudspeaker. The loudspeaker may include a driver unit and a waveguide attached to the driver unit. The loudspeaker further may include a lens system. The lens system may include a plurality of plates. The plates may be po... | 10/09/2007 |
| 7178629 | Electroacoustic public address unit with acoustic horn or waveguide A horn or waveguide public address unit, enabling to adapt the dispersion characteristics of the horn or waveguide. The unit is provided with at least one profiling component (21a, 21b) constituting a removable dispersion shaper, capable ... | 02/20/2007 |
| 7095868 | Phase plug with optimum aperture shapes A phase plug for optimally matching a drive-unit's diaphragm to the throat of a waveguide is disclosed. Specific embodiments of a circular diaphragm matched to an elliptical waveguide and a circular diaphragm to a rectangular waveguide are disclosed. ... | 08/22/2006 |
| 7044265 | Constant directivity acoustic horn An improved throat (2) for transmitting acoustic energy from a source driver unit (7) to a feeder section (3) of a directivity controlling acoustic horn is disclosed. The throat (2) comprises: a circular throat entrance (2i)... | 05/16/2006 |
| 6912290 | Speaker unit for low frequency reproduction The invention provides a speaker unit for low frequency reproduction wherein distortion is reduced and the orientation of a sound image of the lower side frequency region is augmented. To that end, the phase characteristic in an actually used frequency band is made ... | 06/28/2005 |
| 6909670 | Ultrasonic sensor assembly for a vehicle reversing radar An ultrasonic sensor assembly for a vehicle reversing radar has an ultrasonic sensor (10) with two electric wires (12). A sleeve (20) is made of rubber material and has a chamber (22) receiving the sensor (10). A cone-shaped openin... | 06/21/2005 |
| 6836239 | Method and system for displaying text on a radial display A method for displaying horizontally aligned characters on a radial display is disclosed. Each range bin for each scan line is associated with a rectangular grid location to determine the character located in the grid location and the background color and foreground... | 12/28/2004 |
| 6574344 | Directional horn speaker system A directional speaker system includes an enclosure having an inner surface, an outer surface, an open end, and a closed end, a speaker driver directed toward the open end and mounted near the closed end of the enclosure, an in-line phase plug mounted in f... | 06/03/2003 |
| 6549637 | Loudspeaker with differential flow vent means Differential flow vents allow airflow within a vent to be preferential. A flange disposed within a vent introduces non-linearities and causes a preferred direction of airflow into an expanding volume. The differential flow vents are used in conjunction wi... | 04/15/2003 |
| 6343132 | Loudspeaker The present invention provides a loudspeaker capable of matching a sound image and a picture image on a screen of an image reproducer with each other in simple construction and a simple method of installation. The loudspeaker is located above the image re... | 01/29/2002 |
| 6026928 | Apparatus and method for reduced distortion loudspeakers Method and apparatus applied to loudspeakers of the type having an electrically driven diaphragm in an acoustic housing to reduce distortion from two sources. 1. Loss of high frequencies when sound from different regions of the diaphragm travel paths of d... | 02/22/2000 |
| 6001132 | Preparation of aqueous solutions suitable for finishing cellulose containing textile materials Aqueous solutions of N-methylol compounds of carboxamides, urethanes, ureas and aminotriazines or of N-methylol ethers of these compounds that are suitable for finishing cellulose-containing textile materials are prepared by reaction of compounds having o... | 12/14/1999 |
| 5837890 | Jet engine test cell structure A jet engine test cell capable of dissipating infrasound. The test cell includes an engine test section, an augmentor and an exhaust stack having a structure near its open end for dissipating infrasound.... | 11/17/1998 |
| 5778084 | Loudspeaker with phase correction The invention concerns a loudspeaker with a diaphragm which is electromagnetically induced to vibrate and is made of a central dome-shaped part and a conical part surrounding the latter, and a phase-correction device, consisting of a cone fixed in the hou... | 07/07/1998 |
| 5740259 | Pressure wave transducing An electroacoustical transducing system for exchanging pressure wave energy with a medium that propagates pressure waves includes an electroacoustical transducer having a vibratile surface. At least one low-loss pressure waveguide has one end adjacent to ... | 04/14/1998 |
| 5404784 | Apparatus for modifying the percussive sound emanating from a drum An apparatus (32) for modifying the percussive sound emanating from a drum (10) includes a hollow skirt (34) having a first end (36) and a second end (38) that define openings (40) and (42) that are in opposition and communication with each other. The ski... | 04/11/1995 |
| 5351220 | Moving-coil electrodynamic electroacoustical transducer The present invention involves a moving-coil electrodynamic electroacoustical transducer, comprising a disk made of a hard, nonmagnetic material (12), which is superimposed on the diaphragm (11) and has openings for the output of sound, a power-factor-imp... | 09/27/1994 |
| 5163167 | Sound wave guide A wave guide fitted at the output of a loudspeaker, in front of the membrane or in front of the orifice of a compression chamber, along the axis of the transducer being considered, and comprising a conduit which expands from its input to its output. The a... | 11/10/1992 |
| 4975965 | Loudspeaker design A loudspeaker including a diaphragm for generating sound waves, the diaphragm being comprised of a peripheral conical portion adjacent to and surrounding a central domed portion, a flared horn adjacent to the diaphragm for receiving and projecting the sou... | 12/04/1990 |
| 4930596 | Loudspeaker system A loudspeaker system which comprises a loudspeaker unit for radiating a first sound, a horn unit having a throat coupled to the back of the loudspeaker for radiating a second sound, and an acoustic filter provided in the horn for causing an acoustic imped... | 06/05/1990 |
| 4882562 | Adaptor for coupling plural compression drivers to a common horn An improved adaptor for coupling a plurality of compression drivers to the throat of a common horn is disclosed. The improved adaptor of the present invention includes a passage coupled to each of the plurality of compression drivers, the passages extendi... | 11/21/1989 |
| 4840250 | Acoustic impedance inducing device An acoustical impedance inducing device is created for axial insertion into the longitudinal air column of a wind musical instrument. The device includes a first annular band of first predetermined thickness and a second annular band of approximately twic... | 06/20/1989 |
| 4790020 | Horn type loudspeakers A horn type loudspeaker comprises a drive unit, which is largely the same in structure and features as the conventional drive unit, and a horn member specially designed to effectively minimize its size and weight. Said horn member comprises a hollow disk ... | 12/06/1988 |
| 4776428 | Sound projection system A sound projection system for use in diffusing sound of a frequency ranging from 160 Hz up to 5 KHz over a relatively long distance with a substantially constant distribution of the sound over a wide diffusion angle, whereby the quality and intensity of t... | 10/11/1988 |
| 4718517 | Loudspeaker and acoustic transformer therefor A speaker system including a frusto-conical diaphragm, and a phase plug mounted within the volume formed by the diaphragm, the phase plug including a pair of substantially diametric open slots extending across the diaphragm and through the phase plug, wit... | 01/12/1988 |
| 4713799 | Ultrasonic horn with sidelobe suppressing centerpiece An ultrasonic horn assembly includes a horn with a bore tapering from a throat out to a mouth. An ultrasonic transducer is mounted in the throat of the horn. A beam narrowing insert includes a headpiece which tapers smoothly from a larger diameter base to... | 12/15/1987 |
| 4685532 | Constant directivity loudspeaker horn A high-frequency constant-directivity horn including a relatively large throat driver and a relatively large throat for receiving sound from the driver, further includes a pair of vanes mounted wholly within the throat, respectively above and below the lo... | 08/11/1987 |
| 4525872 | Amplifier An accessory for mounting on the receiver of a personal paging system. The receiver is normally worn below ear level and the accessory increases the sound of the paging signals reaching ear level.... | 06/25/1985 |
| 4390078 | Loudspeaker horn A loudspeaker horn which provides constant coverage angles in both the horizontal and vertical planes and affords proper driver loading and a smooth impedance curve down to the lowest frequencies of operation. The throat entrance of the horn is round, to ... | 06/28/1983 |
| 4325456 | Acoustical transformer for compression-type loudspeaker with an annular diaphragm An acoustical transformer or "phasing plug" for coupling the sound from an annular diaphragm to the throat of a compression-type loudspeaker. The phasing plug in the invention has the general shape of a doubly-truncated cone with an annular surface locate... | 04/20/1982 |
| 4310065 | Radial horn A speaker horn is adapted for coupling to a speaker drive assembly and for dispersing incident sound energy in a 360° radial pattern. The horn includes two sound-dispersing structures for making a passageway generally symmetrical about a longitudinal axi... | 01/12/1982 |
| 4181193 | Sound projection system A sound projection system comprising means defining a longitudinally extending acoustic channel which is acoustically open at a front end of the channel and acoustically closed at a rear end and at sides of the channel, a loudspeaker having a cone diaphra... | 01/01/1980 |
| 4091891 | Horn speaker A horn speaker comprising a diaphragm positioned close to a throat and side walls forming sound passages for radiating the vibrations of the diaphragm effectively as sound waves from the mouth of the speaker.... | 05/30/1978 |
| 4050541 | Acoustical transformer for horn-type loudspeaker An acoustical transformer or "phasing plug" for coupling sound from a speaker diaphragm to the throat of a horn. The phasing plug of the invention is in the general shape of a dome on one side and a truncated cone on the other, and has evenly spaced radia... | 09/27/1977 |
