Bizarre Patents
Cloaking System Using Optoelectronically Controlled Camouflage
A Cloaking System designed to operate in the visible light spectrum, utilizes optoelectronics and/or photonic components to conceal an object within it.
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| Number | Title | Issue Date |
| 4387784 | Stethoscope with improved resonant cavity amplification One or more resonant cavities are selectively connected to the main sound passage of a stethoscope in order to selectively amplify frequency ranges of interest. The amplified frequency range is controlled by positioning a vent in a side wall of the resona... | 06/14/1983 |
| 4377727 | Stethoscope having means for measuring pulse frequency An improved stethoscope having means for measuring the frequency of a series of pulses, such as human heart pulses, is disclosed, in the use of which such pulses are detected simultaneously with detection of a series of timed detectable reference impulses... | 03/22/1983 |
| 4347911 | Acoustic headset An improved acoustic headset of the type used with sound reproduction equipment in airline entertainment systems. The headset has a yoke supporting a pin of curved sound-transmitting horns which terminate in soft tips for insertion in a passenger's ears. ... | 09/07/1982 |
| 4299303 | Noise attenuating stethoscope A noise attenuating stethoscope is coupled to a noise attenuating headset having first and second sound attenuating ear cups which are coupled to the ends of a headband. A pair of ear tubes extends laterally through an aperture in the side of each ear cup... | 11/10/1981 |
| 4270627 | Stethoscope with probe sound pick-up and resonant cavity amplification A stethoscope having one or more resonant cavities adjusted to amplify sound frequencies of interest, such as those of the heart or lungs of a patient, and including a pick-up head that contacts the patient through a probe.... | 06/02/1981 |
| 4239089 | Stethoscope chestpiece A two-microphone stethoscope chestpiece is dislcosed wherein the locking mechanism for securing the shaft within the body of the chestpiece against axial movement and the indexing mechanism for aligning the shaft with the selected microphone are combined ... | 12/16/1980 |
| 4232582 | Acoustical stringed musical instrument pick-up An apparatus for transmitting acoustical energy from a stringed musical instrument having a bridge and string anchor to a listener comprising an energy pick-up chamber, an energy transmission member and a means for transmitting said energy to a listener i... | 11/11/1980 |
| 4226248 | Phonocephalographic device A portable instrument for phonocephalography is provided having a pair of ear insertable microphones of sufficient sensitivity to detect sounds from the surface and cavities of the head. An amplifier is provided for increasing the output signal from each ... | 10/07/1980 |
| 4226162 | Attachment for musical wind operated instruments A device which consists of a hollow cylindrical member attachable to the end of a musical wind operated instrument. A stethoscope is located inside the hollow body and serves to pick up sounds issuing from the end of the muscial instrument. The hollow mem... | 10/07/1980 |
| 4212368 | Angularly related dual stethoscope head A stethoscope head having a bell and a diaphragm. The bell is offset from the diaphragm axis. The bell axis intersects the diaphragm axis at an acute angle of not less than twenty degrees or more than seventy degrees, and preferably at thirty degrees. A s... | 07/15/1980 |
| 4200169 | Stethoscope This invention relates to a stethoscope having improved acoustical properties. The improvement comprises twin, smooth-walled sound pathways extending from the chestpiece to the ear tips which are free of sound leakage and each pathway has a constant diame... | 04/29/1980 |
| 4177871 | Toy stethoscope A toy stethoscope having a resilient sound collector at one end thereof. The sound collector is soft and pliable so as to prevent injury to a person in the event the person is struck by the sound collector. The sound collector further comprises a damper f... | 12/11/1979 |
| 4167223 | Mechanically operable acoustic filter A mechanically operable acoustic filter for varying the acoustic spectrum of transmitted sound signals. Sound signals, e.g. from a patient's skin when the filter is incorporated into the chest piece of a stethoscope, are received at an inlet orifice which... | 09/11/1979 |
| 4149610 | Acoustic headsets An acoustic headset having a pair of elongated channel structures for carrying sound tubes which are provided with ear pieces situated adjacent upper end regions of the channel structures. These channel structures have distant from their upper end regions... | 04/17/1979 |
| 4112809 | Stringed instrument for play training A stringed instrument for training purposes resembles the usual instrument but comprises a body of sound-damping material which replaces the resonance-box to reduce exterior sound, the sound of the strings being transmitted to the ears of the user by a li... | 09/12/1978 |
| 4064965 | Stethoscope A stethoscope having a plurality of connector plugs positioned between the head set unit and the sound pick-up diaphragm unit wherein the connector plugs are removably attached to each other by a tubular yoke which provides communication between the head ... | 12/27/1977 |
| 4029169 | Acoustic yoke A "U" shaped yoke for retaining a pair of ear couplers to the ears of an individual at a minimum effective pressure in an acoustic system. A pair of right-angle horns carry the ear couplers and are rotatively mounted at the extremities of the U to allow o... | 06/14/1977 |
| 4011925 | Stethoscope The present invention relates to stethoscopes of the type commonly employed by air line passengers for use with entertaining sound apparatus and is concerned primarily with a stethoscope which may be adjusted for comfort when applied to and suspended from... | 03/15/1977 |
| 4007806 | Heated stethoscope A diaphragm type stethoscope for conveying sounds from within a patient's body to the ears of a medical examiner. A heating element is mounted within the hollow head of the stethoscope substantially adjacent the diaphragm member thereof for selectively he... | 02/15/1977 |
| 3999625 | Device for simultaneous modulation and amplification of low frequency sounds A device for simultaneously modulating and amplifying low frequency sounds which comprises a tubular member having an axial bore extending a distance interiorly of the inlet end thereof and tapering to a reduced axial bore in said tubular member. A genera... | 12/28/1976 |
| 3993161 | Acoustic headsets The described headsets have earpieces at the ends of acoustic tubing, the tubes being shaped about the wearer's head by a resilient frame that biases the earpieces against the wearer's outer ears. Pairs of spaced-apart strips form resilient arms of the fr... | 11/23/1976 |
| 3951230 | Multi-sound chamber stethoscope A stethoscope having a head wherein a diaphragm sound chamber is disposed within a housing which allows for the head to be used as a diaphragm sound chamber or a bell sound chamber without removal of the stethoscope head from the patient.... | 04/20/1976 |
| 3938615 | Stethoscope consisting of a stethoscope chest piece and a sound mixer An improved stethoscope for use in medical diagnosis as a listening device to detect sounds within the thoracic cavity is provided having improved sound reception and transmission characteristics. The improved stethoscope has an improved stethoscope chest... | 02/17/1976 |
| 3934674 | Acoustic headsets Acoustic headsets, especially for transmitting sound from stereo transducers to the listener's ears, include two tubes, earpieces at first ends of the tubes, and a frame for constraining the tubes into a convenient U-shape near the wearer's face. The head... | 01/27/1976 |
