Bizarre Patents
A method of swing on a swing is disclosed, in which a user positioned on a standard swing suspended by two chains from a substantially horizontal tree branch induces side to side motion by pulling alternately on one chain and then the other.
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| Number | Title | Issue Date |
| 7292179 | Instantaneous passive range finding A method and apparatus for use in determining the range in a single time sample from a platform to a target are disclosed. The method includes receiving radiation emanating from the target at two points on the platform in a common time sample; detecting the received... | 11/06/2007 |
| 7205947 | Litzendraht loop antenna and associated methods The antenna includes a Litz wire loop having a plurality of individually insulated wires braided together and a plurality of splices therein to define distributed capacitors. A magnetically coupled feed loop is provided within the electrically conductive loop, and a... | 04/17/2007 |
| 7170440 | Linear FM radar A FM-CW radar system comprises a frequency modulated continuous wave digital generator that produces both in-phase (I) and quadrature-phase (Q) outputs to orthogonally oriented transmitter antennas. A linearly polarized beam is output from a switched antenna array t... | 01/30/2007 |
| 7123943 | Method of generating directional antenna beams, and radio transmitter A method of forming directional antenna beams, comprising: directing at least two antenna beam signals by means of a beam formation matrix and pre-phasing pre-determined antenna beam signals formed with an antenna array in such a way that the signal of at least one ... | 10/17/2006 |
| 7096120 | Method and arrangement for guiding a user along a target path An audio-based guide arrangement is provided for guiding a user along a target path by the use of virtual audio beacons. The user's current location is sensed and compared to the target path. Sounds are fed to the user, for example through stereo headphones, to simu... | 08/22/2006 |
| 7009559 | Method and apparatus for adapting antenna array using received predetermined signal A mobile subscriber unit includes a smart antenna having antenna elements for generating a plurality of antenna beams, and adjustable weight control components connected to the antenna elements for selecting any one of the antenna beam. A transceiver is connected to... | 03/07/2006 |
| 6606057 | High gain planar scanned antenna array An antenna array having a central active element and a plurality of passive elements surrounding the active element is disclosed. A dielectric substrate or other slow wave structure is disposed radially outwardly from the passive elements for slowing the ... | 08/12/2003 |
| 4833478 | Automatic direction finder antenna array An automatic direction finder antenna array having a plurality of pairs of oppositely positioned antenna elements arranged radially from a common center with each pair forming a cardioid radiation pattern when energized. Switching apparatus energizes succ... | 05/23/1989 |
| 4635065 | Antenna device for direction finders An antenna device for a direction finder includes a substantially grounded conductive base plate, a plurality of web-shaped antenna elements mounted in spaced relation on the base plate and having central portions extending in crisscross relation and insu... | 01/06/1987 |
| 4622540 | Security system status reporting Alarm system apparatus and method for optically transmitting information indicative of system operational status from an alarm detection unit to a remote receiver. The alarm detection unit includes a light emitting element for optical transmission of diag... | 11/11/1986 |
| 4510498 | Plate antenna for direction finder In an antenna device for a direction finder including an electrically conductive antenna plate of a configuration symmetrical around its center and disposed in parallel with a base plate with a predetermined distance maintained therebetween, a plurality o... | 04/09/1985 |
| 4475106 | High sensitivity portable radio direction finder A simple inexpensive, very effective high to ultra high frequency radio direction finder is disclosed utilizing two parallel antenna units with switching means for alternately connecting the antenna units to a conventional unmodified FM or NBFM receiver a... | 10/02/1984 |
| 4317120 | Sector scan ADF system An automatic radio direction finding system having inputs for a circular array with a plurality of directional antennas, each being switched in sequence producing a directional pattern in azimuth. The combined RF signal is carried through the receiver as ... | 02/23/1982 |
| 4263597 | Nondisruptive ADF system An automatic radio direction finding (ADF) system having inputs for four quadrature antennas each having a cardioid pattern. Each input is amplitude modulated in quadrature and then combined in a hybrid circuit to produce a nondirectional pattern. The com... | 04/21/1981 |
| 4028624 | Electronic switching arrangement for a homing and traffic radio system A switching arrangement which, in conjunction with a single radiating arrangement comprising two antennas, allows multiple functions to be provided, in particular reversals and switching operations corresponding to the operating modes represented by homin... | 06/07/1977 |
| 4025924 | Mobile direction comparator A Mobile Directional Comparator (MDC) used in combination with a communications receiver to process received signal information from a two port antenna system to drive a directional indicator. A radio frequency modulator modulates two received cardioid an... | 05/24/1977 |
| 3995236 | Double sideband modulator A modulator employs a pair of variable RF attenuators to produce a double sideband, suppressed carrier output. The attenuator devices are PIN diodes which are rendered alternately conductive in synchronism with the recurring half cycles of the audio frequ... | 11/30/1976 |
