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A fork with timer for providing a cue to a user after an elapsed period of time for indicating that another bite of food using the fork may be taken.
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| Number | Title | Issue Date |
| 4379212 | Electro-acoustic transducer An electrical acoustical transducer is provided having a piezoelectrical layer in a housing with a transducer plate. The transducer plate divides the housing into a front chamber and a rear chamber. In the rear chamber, there is provided a Helmholtz reson... | 04/05/1983 |
| 4379213 | Electroacoustical converter A barrel-shaped diaphragm comprising a plurality of barrel stave-like strips with slits forming gaps between them is mounted on the vibration coil of a vibration generator that is based on a housing. A traverse bar which is based on the housing extends up... | 04/05/1983 |
| 4376232 | Electro-acoustic transducer The invention concerns an electro-acoustical transducer with a transducer plate having a piezo electric layer and which subdivides the housing of the transducer into a front and back chamber. In the front chamber, means are provided for the attenuation of... | 03/08/1983 |
| 4313521 | Speaker housing An improved loudspeaker housing including a closed chamber in the shape of a triangular right prism closed at both ends. All of the three walls of the prism and rectangular in shape and two of the walls are at right angles to each other. A circular openin... | 02/02/1982 |
| 4297538 | Resonant electroacoustic transducer with increased band width response An electroacoustic transducer which includes a vibratile diaphragm operating at resonance has its narrow band width response characteristic increased by an order of magnitude by the use of a uniquely designed acoustic coupler in combination with the reson... | 10/27/1981 |
| 4231445 | Acoustic lens speaker cabinet A cabinet for improving the sound output of an amplifier including an upright housing with a speaker mounted on the front, the front having one or more baffle openings, a device herein called a sound lens inserted in the baffle opening, the vibration of t... | 11/04/1980 |
| 4220831 | Intrusion sensing device An intrusion sensing device includes a sound frequency discriminating micophone having a diaphragm coupled to the atmosphere through a closed end resonating chamber having a length equal to one quarter the median wavelength of a relatively narrow band of ... | 09/02/1980 |
| 4216650 | Alarm wristwatch An alarm wristwatch comprises a watchcase having a back with an inclined peripheral portion and a watchband attached to the watchcase at opposite sides. A transducer for generating an alarm signal faces a cavity provided in a rear portion of the watch cas... | 08/12/1980 |
| 4215761 | Bass sound projection systems A bass sound projection system comprises a cabinet containing at least one bass loudspeaker operating into a sound channel. The sound channel converges forwardly, relative to the direction of propagation of sound waves, of the loudspeaker to a throat and ... | 08/05/1980 |
| 4189627 | Electroacoustic transducer filter assembly An electroacoustic transducer assembly adapted to filter sound waves in a digital communication system incorporates a plurality of tandemly arranged tubular members and a transducer. Each tubular member includes an apertured plate end, a tubular cavity an... | 02/19/1980 |
| 4142603 | Adjustable speaker cabinet A cabinet for improving the sound output of an amplifier, the cabinet being in the form of an upright rectangular housing with a horizontal partition dividing the interior into an upper and lower portion, the partition having a speaker opening and a baffl... | 03/06/1979 |
| 4131179 | High fidelity speaker system A speaker system comprised of an enclosure with a partition inside. The partition, set apart from a wall of the enclosure, has an aperture in it. A loudspeaker, mounted at the wall, has a speaker cone projecting into the aperture in the partition.... | 12/26/1978 |
| 4029170 | Radial sound port speaker A speaker component mounted into a frame and related structure which is designed to reproduce sound in its most real and true form from an amplifier or other sound source and including a speaker mounting panel for the speaker component, a back wall, a fro... | 06/14/1977 |
| 3993162 | Acoustic speaker system A speaker enclosure for a stereophonic sound system is disclosed. The speaker is mounted in a chamber, the enclosure of which is connected to a tube of relatively long length and of circular cross-section. The construction is such that phase-inversion occ... | 11/23/1976 |
| 3980154 | Cabinet for improving the sound output of an amplifier A cabinet for improving the sound output of an amplifier including an upright housing having a horizontal partition dividing the interior of the housing into an upper portion and a lower portion, a speaker mounted in the horizontal partition and oriented ... | 09/14/1976 |
| 3930560 | Damping element A damping element comprising fiberous fuseable material shaped to form a cup-like member which may be inserted in the sound openings of an acoustic transducer to provide a selected acoustic resistance.... | 01/06/1976 |
