Bizarre Patents
Wearable Device For Feeding and Observing Birds and Other Flying Animals
A device for feeding and observing flying animals comprising a hat, a support mounted on the hat and extending outward from the hat, and a feeder mounted on the support.
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| Number | Title | Issue Date |
| 7570543 | Normally closed pressure-sensitive hydrophone switch A pressure-sensitive switch comprising an electrically-insulating base member having front and back surfaces with a through opening extending between the two at the center of the base member. Two electrodes are mounted on the base member's front surface and each hav... | 08/04/2009 |
| 7295493 | Pressure tolerant fiber optic hydrophone An interferometric hydrophone is disclosed that comprises a first mandrel defining an interior that is open to surrounding fluid. A sensing optical fiber is wound upon the first mandrel. A second mandrel is positioned in surrounding relationship with respect to the ... | 11/13/2007 |
| 7170822 | Laminated piezoelectric transducer and method of manufacturing the same The invention is illustrated as an underwater acoustic transducer comprising an active acoustic element for transducing sound and electrical signals; a front and rear housing element disposed on each side of the active acoustic element to define a corresponding fron... | 01/30/2007 |
| 6754136 | Hydrophone with automatic inhibition in case an adjustable immersion threshold is exceeded A hydrophone which is automatically inhibited when the immersion depth exceeds a predetermined threshold by action, on the push element (7) of a switch (6), of a flexible wall that bends under the action of the outside pressure. The hydrophone comprise... | 06/22/2004 |
| 6515940 | Electrodynamic transducer for underwater acoustics Disclosed is an electrodynamic transducer designed to emit acoustic waves in a sea environment while being capable of withstanding external explosions. The lower pole piece of such a transducer is drilled with vertical holes enabling air to circulate insi... | 02/04/2003 |
| 6483778 | Systems and methods for passively compensating transducers Systems and methods of the invention can equalize the pressure between an interior cavity and an environment exterior to the interior cavity, while providing for acoustic isolation between the two environments so that acoustic energy propagating through o... | 11/19/2002 |
| 6275448 | Pressure-compensated acceleration-insensitive hydrophone A generally cylindrical hydrophone configuration provides compensation for longitudinal accelerations by placing four identical solid piezoelectric transducer elements along its axis with each transducer element being bonded to a head member, two of which... | 08/14/2001 |
| 6122225 | Hydrophone with compensation for statical pressure and method for pressure wave measurement Device (20) for measuring pressure waves in a liquid medium (E), comprising; one or more sensor elements (23) permeable to optical radiation; one or more support members (22) on which a sensor element (23) is arranged in each case and which is at least sl... | 09/19/2000 |
| 6046962 | Electrodynamic transducer for underwater acoustics Disclosed is an electrodynamic transducer designed to emit acoustic waves in a sea environment. The dome of a transducer such as this is provided with a horn sliding in the body of the transducer with an adjutage whose clearance is extremely small. This r... | 04/04/2000 |
| 5828761 | Sound amplification system having a submersible microphone A sound amplification system includes an amplifier and a waterproof microphone. In an exemplary embodiment the microphone includes a transducer within a cavity covered by a resilient waterproof membrane. The system can monitor either the complete frequenc... | 10/27/1998 |
| 5784341 | Underwater acoustic transmitter for large submersion The invention relates to underwater acoustic transmitters intended to be submerged at large depths. It consists in threading the set of annuli forming the transmitter onto an internal tube (303) preferably made from a carbon/resin composite, which support... | 07/21/1998 |
| 5768216 | Flexitensional transducer having a strain compensator In a flextensinal transducer a drive stack provided inside the oval shell has a strain compensator that has a cylinder and piston. The cylinder is provided in the oval shell, and the piston is stiffly attached to the end of the drive stack. Inside the cyl... | 06/16/1998 |
| 5579287 | Process and transducer for emitting wide band and low frequency acoustic waves in unlimited immersion depths The present invention relates to a process and transducer for emitting wide and and low frequency acoustic waves in unlimited immersion depth. The invention is applied to tranducers comprising at least one electro-acoustic motor (1) causing any wall 3 of the sa... | 11/26/1996 |
| 5555221 | Device for picking up sound waves propagating in water A chain of elongate components (10, 20) are connected end-to-end. Each component (e.g. 10) comprises a sheath (1) closed at its ends filled with a dielectric liquid (e.g. kerosene). Sound detectors are located in the liquid as are electric conductors for ... | 09/10/1996 |
| 5450373 | Apparatus for transmitting two frequency signals with an acoustic projector An acoustic projector wherein a unitary acoustic resonator produces active sonar signals in more than one frequency band. The double-slotted resonator is coupled to a transducer which is capable of exciting the resonator in two, distinct, volumetric modes... | 09/12/1995 |
| 5361240 | Acoustic sensor A pressure compensated hydrophone assembly consists of a hollow mandrel that has an outer surface. The central portion of the outer surface of the mandrel defines a concavity. A flexible, resilient piezoelectric film is wrapped several times around the ma... | 11/01/1994 |
| 5349568 | Leak locating microphone, method and system for locating fluid leaks in pipes A leak detecting microphone inserted directly into fluid within a pipe includes a housing having a first end being inserted within the pipe and a second opposed end extending outside the pipe. A diaphragm is mounted within the first housing end and an aco... | 09/20/1994 |
| 5301170 | Ultrasonic sensor mounting device A device for mounting an ultrasonic transducer on user equipment for operation in a contaminating, ambient environment. A housing has a forwardly extending, profiled inner surface for promoting focusing along an axis of ultrasonic waves emitted by a trans... | 04/05/1994 |
| 5247490 | Pressure-compensated optical acoustic sensor There is described an optical acoustic sensor that is pressure-compensated for operation in high-pressure environments such as the deep sea and that may be employed in multi-sensor arrays. The sensor includes an acoustically responsive diaphragm that is i... | 09/21/1993 |
| 5243566 | Low noise transducer system An acoustic array of special utility in deep operating antisubmarine torpedoes comprises a plurality of individual transducer elements supported by a back-plate member. An acoustic window made of an elastomeric or plastic material is mounted against the f... | 09/07/1993 |
| 5222050 | Water-resistant transducer housing with hydrophobic vent An immersion-resistant housing adapted to receive a vibratable diaphragm spanning the interior of the housing to divide the housing into first and second chambers includes a first port communicating between the first chamber and the exterior environment. ... | 06/22/1993 |
| 5155709 | Electro-acoustic transducers A transducer for use in surface ship applications includes a prestress element for providing additional compressive force to an electromechanical driver disposed within the transducer. The transducer includes a shell having inner portions, an electromecha... | 10/13/1992 |
| 5140560 | Pressure compensated transducer system with constrained diaphragm An acoustic source apparatus has a acoustic transducer that is enclosed in substantially rigid and watertight enclosure to resist the pressure of water on the transducer and to seal the transducer from the water. The enclosure has an opening through which... | 08/18/1992 |
| 5132941 | Method and apparatus for sensing sound waves in a fluid medium A method and apparatus (10) for sensing sound in a fluid medium. The apparatus (10) includes an element (12) for generating polarized light having a predetermined plane of polarization. In addition, the apparatus (10) further includes an element (14) for ... | 07/21/1992 |
| 5103432 | Expendable sound source A low frequency, high powered underwater sound source includes a housing ing disposed therein, a loudspeaker, a bladder disposed over the loudspeaker for containing a pressurized non-liquid sound transmission medium, a fill system for filling the bladder... | 04/07/1992 |
| 5062089 | Sonar projector with liquid mass loading for operation at lower frequency A sonar projector having a pair of opposed oscillating pistons driven by an electromagnetic assembly is rendered capable of operating at reduced resonant frequency by providing liquid mass loading for the pistons. The mass loading is achieved by utilizing... | 10/29/1991 |
| 5043953 | Pressure compensation device for an immersed volume of gas, in particular for an underwater electroacoustic transducer This pressure compensating device for a volume of immersed gas is equipped with mobile or deformable walls and includes an immersed compensation bladder. The bladder is secured in a housing and communicates with the volume to be compensated. It is arrange... | 08/27/1991 |
| 5007030 | Transducer assembly for deep submergence A transducer assembly comprising: a diaphragm; at least one transducer elnt bonded by its head to the diaphragm; a pressure-resistant means, for supporting the transducer assembly; an acoustic isolator mounted about the transducer element and located bet... | 04/09/1991 |
| 5003285 | Transducer array A transducer array designed for towing at an extended distance behind a sace vessel includes electroacoustical transducer elements connected in opposition to the active elements of the array. A surrounding acoustic isolation structure effectively isolate... | 03/26/1991 |
| 4996675 | Signal sensor insensitive to static pressure variations A signal sensor automatically compensates for the variations of the static pressure of the medium in which it is placed. The signal sensor comprises one or two assemblies each formed of a piezoelectric sensitive element applied against one face of a flexi... | 02/26/1991 |
| 4991153 | Vibration type transducer The apparatus of the present invention detects the resonant frequency of a vibratory member in contact with a fluid. The detection of the resonant frequency enables the device to be used to detect the density of a fluid which it is in contact with and the... | 02/05/1991 |
| 4951698 | Process and devices for maintaining the gas contained in a submerged enclosure in pressure equilibrium with the outside This invention relates to a device for maintaining the gas contained in a submerged enclosure in pressure equilibrium with the outside, comprising a plurality of deformable bags which are immersed at the same time as said enclosure which are filled with g... | 08/28/1990 |
| 4926398 | Pressure compensated communication system The present invention provides a pressure compensated communication system having at least one audio transducer, the pressure compensated communication system comprising a fluid tight housing for the or each audio transducer, the or each housing having a ... | 05/15/1990 |
| 4918666 | Tubular piezo-electric sensor with high sensitivity A tubular piezo-electric sensor has at least one sensitive element disposed against an outer surface of a tubular support. A substance whose acoustic impedance is very different from that of the material forming the tubular support is disposed therein and... | 04/17/1990 |
| 4875199 | Deep water transient sound generator This invention relates to an underwater transient sound generator capable of operating at substantial depths. The pulse produced by the generator is used to determine subbottom terrain in underwater surveying. Essentially, the invention consists of an ele... | 10/17/1989 |
| 4872148 | Ultrasonic transducer for use in a corrosive/abrasive environment An ultrasonic transducer assembly capable of being operated in a corrosive and/or abrasive environment that might otherwise degrade transducer performance and/or damage transducer related components. The assembly includes an ultrasonic transducer of the t... | 10/03/1989 |
| 4868799 | Means for equalizing the internal pressure in an underwater transducer employing a vibratile piston to permit operation of the transducer at water depths in excess of a few hundred feet A deep-water low-frequency transducer employs a collapsible air chamber to equalize the internal transducer air pressure with the external hydrostatic pressure at the submerged operating depth. A capsule containing a highly pressurized gas is mounted insi... | 09/19/1989 |
| 4862430 | Wide pass band elastic wave omnidirectional transducer Wide pass band elastic wave omnidirectional transducer. It comprises a magnetostrictive material membrane (34, 36) provided with two electrical connections at two diametrically opposite points. The potential difference between these connections is proportional... | 08/29/1989 |
| 4853905 | Seal for marine seismic source A marine seismic vibrator includes a housing having first and second housing portions defining an internal chamber therebetween. A hydraulic cylinder or other energizing device is connected between the first and second housing portions. The first and seco... | 08/01/1989 |
| 4839871 | Underwater communication device An underwater speaker system having a pressure equalization system enabling the speaker to operate in its intended fashion over a wide range of water depths, e.g. from two feet up to sixty feet. Water pressure is applied to a diaphragm that forms one wall... | 06/13/1989 |
