Bizarre Patents
Mouthguard made at least partially from an edible candy
A mouthguard includes a U-shaped upper bite plate which removably fits over upper teeth of a person, with the entire upper bite plate being made from a soft, deformable and edible gummi candy.
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| Number | Title | Issue Date |
| 4996119 | Speaker cone plate and method of forming A speaker cone plate is provided with an inorganic surfacial hard layer formed at least on a face of a metal substrate and is subjected to a reinforcing treatment by hot isostatic pressing, wherein the surfacial hard layer may be composed of a carbide, an... | 02/26/1991 |
| 4903308 | Audio transducer with controlled flexibility diaphragm An improved audio transducer includes a diaphragm having a pair of cylindrically-shaped webs that provide greater bandwidth, reduced distortion and greater horizontal dispersion of sound. The audio output of the transducer is further improved by forming t... | 02/20/1990 |
| 4899390 | Thin speaker having an enclosure within an open portion and a closed portion A speaker which is thin but which is capable of providing high-fidelity reproduction and ensuring a suitable level of sound pressure even when it is brought close to a wall. A closed chamber is formed behind one part of a diaphragm mounted in an enclosure... | 02/06/1990 |
| 4881617 | Radially arcuated speaker cone The present invention is directed to an improved acoustic speaker having a cone located about a transducer wherein the cone has a plurality a thin, pie-shaped segments radiating outwardly from the transducer with each of the segments having an accuated cr... | 11/21/1989 |
| 4837838 | Electromagnetic transducer of improved efficiency An electromagnetic transducer is disclosed wherein separate elongated strips of magnetic material are secured on both sides of a plane containing a flat flexible insulating thin-film diaphragm. Conductors attached to the diaphram extend primarily parallel... | 06/06/1989 |
| 4823907 | Balloon assembly A speaker system includes a thin plate type vibrating element mounted in, and brought into contact with, a balloon formed of a synthetic rubber or resin film. The balloon comprises a balloon member formed of a flexible film such as a vinyl chloride resin ... | 04/25/1989 |
| 4817165 | Acoustic speaker device with a diaphragm having a spider web type core A dome-shaped acoustic motor diaphragm having a core of aluminum foil in the form of a spider web configuration resulting in the dome shape, the diaphragm being in the form of an annular semi-dome outer diaphragm part and a dome-shaped cylindrical inner d... | 03/28/1989 |
| 4792978 | Planar loudspeaker system A planar loudspeaker system having an elongated and substantially planar enclosure, configured to house tweeter, midrange, and a pair of upper and lower woofer diaphragms in its median, longitudinal section. A pair of woofer labyrinths, acting as quarter-... | 12/20/1988 |
| 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 |
| 4699242 | Magnetic speaker A magnetic speaker equipped with a flat diaphragm comprising a straight-grain wood plate or a cross-grain wood plate, for instance, made of Sitka spruce having the specific gravity range from 0.25 to 0.8, presenting excellent acoustic properties, especial... | 10/13/1987 |
| 4655316 | Acoustic diaphragm An acoustic diaphragm is made of metallic sheet material forming a raised pattern of the material and unraised sectors of the material. The diaphragm is of the dome-shaped variety. The raised pattern incorporates sets of raised strip elements. There is a ... | 04/07/1987 |
| 4604792 | Method for making electro-acoustic transducer apparatus The method of making the diaphragm includes pressing on the front face of a film at spaced apart areas to deform it progressively into a series of closely-spaced generally U-shaped projections. A manufacturing device presses the sides of the projections i... | 08/12/1986 |
| 4585090 | Isotrophic loudspeaker An acoustic device in the form of a loudspeaker is described. An envelope consisting of many discrete parts is driven by an internal driven element so that the parts of the envelope move alternately in unison in an outwards direction and in unison in an i... | 04/29/1986 |
| 4567327 | Flat-diaphragm transducer and method of manufacturing such a transducer An electrodynamic transducer of the flat-diaphragm type in which the movement of the voice coil and coil former (2, 3) is transmitted to the flat diaphragm (1) via at least one auxiliary cone (8 or 20). The auxiliary cone is secured to a centering diaphra... | 01/28/1986 |
| 4544805 | Plane speaker A plane speaker comprises a frame having an opening; a diaphragm facing said opening and having secured its peripheral edge portion to the frame; an actuating plate attached perpendicularly to the back of said diaphragm; a coil mounted on the surface of s... | 10/01/1985 |
| 4527657 | Tapered tube impedance matching underwater voice communicator with bubble silencer An underwater voice communicator in which the preferred embodiment comprises a pair of tapered tubes in communication with a diver's mouth. The tubes are constructed of a material having a sound impedance similar to the sound impedance of water. Sound ene... | 07/09/1985 |
| 4473721 | High-frequency loud speaker A high-frequency loudspeaker has a movable diaphragm which is moved to and fro by an actuating unit. The actuating unit, under the impulses of a signal to be converted into sound waves, changes in dimension in at least two opposed directions. The diaphrag... | 09/25/1984 |
| 4472605 | Electrodynamic loudspeaker for low and medium sound frequencies An electrodynamic loudspeaker radiates sound in all directions and with a high output for a low and medium sound frequencies. It comprises two hemispherical movable diaphragms which are arranged on either side of a disc-shaped carrier part. The diaphragms... | 09/18/1984 |
| 4434203 | Diaphragm A diaphragm having a pattern of wrinkles adapted so that the diaphragm is both radially and tangentially expandable with respect to a reference point in that central portion.... | 02/28/1984 |
| 4379951 | Electro-acoustic transducer means An electro-acoustic transducer has a planar annular diaphragm suspended at both the inner and outer periphery. The transducer component is situated within the inner periphery and interacts with the diaphragm via outwardly extending connections.... | 04/12/1983 |
| 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 |
| 4354066 | Rigid-diaphragm transducer with plural coils A rigid surface transducer of the electroacoustic type more commonly referred to as an audio speaker. The transducer comprises an improved diaphragm and driver configuration and improved excitation modes. The improved features employ a rigid diaphragm whi... | 10/12/1982 |
| 4324312 | Diaphragm suspension construction An annular suspension for supporting an acoustic diaphragm around its edge and permitting axial diaphragm movement. The suspension is made of thin folded sheet material, such as aluminum, and includes inner and outer concentric circular fold lines having ... | 04/13/1982 |
| 4321434 | Electroacoustic transducer An electroacoustic transducer having a diaphragm apparatus. The diaphragm apparatus has an annular diaphragm and a pair of outer and inner edges respectively conjoining with the outside and the inside of the diaphragm. Both edges have sets of pleats arran... | 03/23/1982 |
| 4284167 | Sound reproducing device An improved sound reproducing device which includes a housing, an acoustic diaphragm and drive means for driving the acoustic diaphragm. Corrugated compliant coupling means is provided for supporting the acoustic diaphragm with respect to the housing in a... | 08/18/1981 |
| 4252211 | Loudspeaker A loudspeaker includes a flat plate diaphragm mounted in a speaker frame and which is driven by a plurality of magnetic drivers each having a magnetic gap, a voice coil bobbin connected to the diaphragm at a respective node portion of the divided vibratio... | 02/24/1981 |
| 4206832 | Drone acoustical transducer A drone acoustical transducer for a loudspeaker system has an improved means of interconnecting the generally conical speaker diaphragm and supporting basket. In conventional fashion, the acoustical transducer includes a generally conical speaker diaphrag... | 06/10/1980 |
| 4183422 | Underwater communications device A communications device for use under water by a human speaker. A tubular base member has a mouthpiece located at one open end thereof and an inflatable air bag mounted about another open end thereof. In use, the speaker places the mouthpiece around his m... | 01/15/1980 |
| 4160883 | Acoustic transducer and method of making same An acoustic transducer comprising a light weight diaphragm is disclosed in which the internal vibrational resonant modes of the diaphragm are prevented or blocked without damping effects by mounting of the diaphragm on a rigid base parallel thereto by mea... | 07/10/1979 |
| 4146756 | Moving voice coil transducer with diaphragm having concentric sections of opposite curvature An electroacoustic transducer in which a diaphragm of a loudspeaker for converting an electrical signal into an acoustic signal comprises a lower section and an upper section thereof which are split axially of a center pole of a magnetic circuit. The lowe... | 03/27/1979 |
| 4139733 | Electro acoustic transducer with improved diaphragm The invention relates to an electroacoustic transducer for the sound reproduction, comprising a substantially olive-shaped diaphragm body formed of a plurality of convexly pre-curved diaphragm segments capable of bending, damping material accommodated wit... | 02/13/1979 |
| 4107479 | Electro-acoustic transducer A loudspeaker comprising a plurality of stages extended along a predetermined direction, each stage of which includes a movable diaphragm having a resonance out of the frequency range of reproduction and movable within a support structure. The diaphragms ... | 08/15/1978 |
| 4086450 | Variable thickness cone for a dynamic speaker and quality control inspection method therefor A dynamic speaker including a cone, which is of relatively thin rigid truncated cone shape, having a number of radial ribs extending from the central opening portion toward the peripheral portion thereof, and being progressively diminishing, in respect of... | 04/25/1978 |
| 4029910 | Wide dispersion loudspeaker with flexing diaphragm An audio loudspeaker comprising a diaphragm which is rotationally symmetrical about an axis, the diaphragm including a sound propagating surface extending between a larger circular edge and a smaller circular edge spaced apart therefrom along the axis in ... | 06/14/1977 |
| 4003449 | Planar diaphragm A planar diaphragm, preferably for loudspeakers where, on the rear face side there is an asymmetrically shaped sound producing portion, surrounded by marginal and channel shaped portions to assure that sound waves generated by said sound producing portion... | 01/18/1977 |
| 3955055 | Dynamic loudspeaker A dynamic loudspeaker including a dome-type diaphragm having at least one convex surface and another concave surface, contiguous with the convex surface. Specifically, the concave surface is an annular portion surrounding the convex surface.... | 05/04/1976 |
| 3940576 | Loudspeaker having sound funnelling element An elliptically tapered tube or funnel shaped element is fixed to a loudspeaker so that its large diameter end overlies a central region of the loudspeaker diaphragm and such that its small diameter end extends away from the diaphragm. The loudspeaker dia... | 02/24/1976 |
| 3939942 | Electroacoustic transducers The present invention comprises a radially pulsating cylindrical surface operating as a wave transmission-line. The device is responsive to electrical means and may be practically utilized to generate pressure waves. A conventional electromagnetic driving... | 02/24/1976 |
| 3935400 | Oval dome type speaker A speaker assembly comprising a dome shaped diaphragm, the cross section along the plane containing the base of the diaphragm having an oval contour; a voice coil connected to the diaphragm; magnetic means operatively associated with the voice coil; and s... | 01/27/1976 |
