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 |
| 7388550 | PxM antenna with improved radiation characteristics over a broad frequency range A low-loss, high-efficiency, broadband antenna including both electric and magnetic dipole radiators is provided herein. The broadband antenna may be referred to as a “P×M antenna” and may generally include a ground plane; a magnetic radiator formed within the ... | 06/17/2008 |
| 7327320 | Broadband antenna arrangement The invention relates to a compact and robust broadband antenna, for the frequency range from about 800 MHz up to 9 GHz, in particular, for use on railways. The antenna includes a monopole antenna element, extending in a longitudinal direction essentially parallel t... | 02/05/2008 |
| 7123210 | Loop-type antenna The invention concerns an antenna for use as transmission/reception beacon (2), in a radio frequency identifying system, having a general upturned U configuration, located in a vertical plane, above the ground transversely to a passage (9), the vertica... | 10/17/2006 |
| 6774858 | Tapered, folded monopole antenna A folded monopole antenna uses two vertical monopole antenna elements one of which is tapered and resistively loaded to a ground plane. The tapered vertical monopole antenna element includes a series of operably coupled cylindrical sections that extend from a base e... | 08/10/2004 |
| 5357260 | Antenna scanned by frequency variation An antenna scanned by frequency variation, comprising: exciter means for producing a plane electromagnetic wave at a given frequency which is variable about a center frequency; and radiating means receiving the plane wave produced by the exciter means and... | 10/18/1994 |
| 5210541 | Microstrip patch antenna arrays A patch antenna array having multiple beam-forming capability is formed as a feed network (15) on a lower microstrip substrate with patches (13) overlaying these on an upper substrate. The patch array consists of a number of linear series-connected patch ... | 05/11/1993 |
| 5189432 | Radiating antenna cable apparatus A distributed antenna system for wireless communication inside enclosed areas such as buildings, tunnels, etc., includes an antenna cable and a termination circuit which provides a plurality of termination impedances for the cable, varying as a function o... | 02/23/1993 |
| 5140336 | Non-resonant antenna for wind profilers An antenna system particularly suited for wind profiling produces a radio beam which can be oriented in each of four directions and optionally in a fifth, vertical direction and four intermediate directions. The antenna has a single array of strings of co... | 08/18/1992 |
| 5123039 | Energy conversion using high charge density Disclosed are apparatus and method for obtaining energy from high electrical charge density entities. The energy may be received by the conductor of a traveling wave device positioned along the path which the propagating entities follow. Multiple travelin... | 06/16/1992 |
| 5111213 | Broadband antenna Wideband antenna systems may provide continuous coverage over the VLF, HF, VHF, and UHF frequency ranges. Matching transformers, insertion resistors and damping elements are integral parts of these antenna systems.... | 05/05/1992 |
| 5057848 | Broadband frequency meter probe A broadband frequency meter probe utilizes a high frequency antenna and a low frequency antenna to sense wideband electromagnetic energy wherein the different frequency band antennas are closely based monopole and disk antennas. A three-dimensional probe ... | 10/15/1991 |
| 5018180 | Energy conversion using high charge density Disclosed are apparatus and method for obtaining energy from high electrical charge density entities. The energy may be received by the conductor of a traveling wave device positioned along the path which the propagating entities follow. Multiple travelin... | 05/21/1991 |
| 4546358 | Large broadband free radiating electromagnetic test cell This disclosure sets forth a device which produces uniform electromagnetic ields in the medium frequency (MF) and high frequency (HF) regimes over significantly large test volumes. The device converts electromagnetic energy available from a standard radio-... | 10/08/1985 |
| 4536768 | Coaxial power dissipation line A termination for a VHF inverted-V half-rhombic antenna is described, consisting of a transformer terminated into a length of high attenuation coaxial cable acting as a power dissipation line.... | 08/20/1985 |
| 4161736 | Direction finding antenna and system A broad band antenna suitable for mounting on a ground plane comprises a pair of spaced-apart, linear hollow monopoles perpendicular to the ground plane and an air-dielectric coaxial transmission line extending linearly between the monopoles parallel to t... | 07/17/1979 |
| 4115780 | Direction finding antenna system An antenna consisting of three separate members, two members which are oriented perpendicular to a ground plane which function as short monopole antennas and a third member parallel to and above the ground plane which functions as a single conductor trans... | 09/19/1978 |
| 3984838 | Electrically small, double loop low backlobe antenna An electrically small, directive, low backlobe broadband antenna is described. The antenna comprises a pair of radiators. Each of the radiators comprises a pair of orthogonally oriented stripline sections carried on a thin substrate. In one embodiment the... | 10/05/1976 |
