Did You Know...
...that power steering was invented by independent inventor Francis W. Davis? As chief engineer in the 1920s of the truck division of the Pierce Arrow Motor Car Company, he saw how hard it was to steer heavy vehicles. So that he would be able to keep the profits from his future invention, Davis left his job, rented a small engineering shop in Waltham, Mass., and developed a hydraulic power steering system that led to power steering.
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| Number | Title | Issue Date |
| 7321729 | Optical ring network with selective signal regeneration and wavelength conversion An optical network includes an optical ring having a plurality of subnets. The subnets each include one or more add/drop nodes that are coupled to the optical ring and that passively add and drop traffic to and from the optical ring in one or more wavelengths. The o... | 01/22/2008 |
| 7295780 | Apparatus for detecting peaks of wavelength-division-multiplexed light, and apparatus for controlling said light Disclosed is an apparatus for controlling wavelength-division-multiplexed light wherein overall power of wavelength-division-multiplexed light is rendered constant through control for uniformalizing the level of only one wave of maximum power, and wherein the levels... | 11/13/2007 |
| 7187867 | Optical wireless communication system The present invention provides a bilateral communication network system, particularly, a optical wireless communication system communicating information frames via an optical node mounted on a mobile object and a plurality of optical repeaters connected to a wired n... | 03/06/2007 |
| 7133616 | Wavelength-selective routing using an optical add/drop architecture A wavelength-selective routing capability is provided in a single network element by configuring the network element using a combination of add/drop network elements to route individual optical channels of WDM signals among a plurality of optical transmission paths ... | 11/07/2006 |
| 6810215 | Optical repeater converting wavelength and bit rate between networks An optical repeater which includes a wavelength converter and a bit rate converter. The wavelength converter converts a wavelength of an optical signal from a first optical network to a wavelength of a second optical network. The bit rate converter converts a bit ra... | 10/26/2004 |
| 6784569 | Data bus for a plurality of nodes A data bus arrangement and method for connecting a plurality of nodes to one another through a star coupler arrangement of a data bus which uses a logical decision gate having a plurality of inputs corresponding to said plurality of nodes wherein the logical decisio... | 08/31/2004 |
| 5341232 | Star-shaped network for data communication between stations The invention concerns a process for data transmission between stations in a star-shaped network in which star couplers are arranged at the branches of the network. The active, asymmetrical star coupler used in the network transmit flows of signals receiv... | 08/23/1994 |
| 5210632 | Signal transmission system having a star coupled repeater A signal transmission system comprising an apparatus which inhibits the repeating in the opposite direction during reception and transmission of frames and which monitors the number of frames which were outputted in one direction from a repeater and the n... | 05/11/1993 |
| 5189414 | Network system for simultaneously coupling pairs of nodes A network system includes a plurality of low-order networks which each have a plurality of nodes coupled through data transfer paths and are mutually coupled by a repeater for data communication between the nodes. The repeater has a switching circuit syst... | 02/23/1993 |
| 4832434 | Network comprising a multitude of optical signal transmission lines connectible to one another via optical mixers For the purpose of expanding the connection capacities of optical mixers in order to form a large network, series connections of such optical mixers are provided. In such networks, such series connections are formed of optical mixers which produce signal ... | 05/23/1989 |
| 4826275 | Optical communication systems using star couplers Optical communication system having repeater amplifiers cascaded with plurality of optical star couplers wherein each star coupler is coupled to an associated set of terminals. Each star coupler has two mixing sections serially disposed between its input ... | 05/02/1989 |
| 4747094 | Signal coupling system for optical repeater system A signal coupler couples more than three transmitter-receivers through optical fiber cables and at least one repeater on a bit-multiplex system, by exchanging or reallocating each time slot according to a transmission station and the related destination. ... | 05/24/1988 |
| 4688260 | High-reliability fiber optic repeater A T-connection fiber-optical repeater employs redundant electrical-to-optical converters for generating optical signals to be distributed to terminal devices connected the repeater, and redundant optical-to-electrical converters for receiving optical sign... | 08/18/1987 |
| 4646361 | Optical star repeater An optical star network for an optical repeater which requires a reduced number of optical receivers. A star repeater receives optical signals transmitted from various communications terminals and checks for data collisions based on output signals of an o... | 02/24/1987 |
| 4644587 | Optical data communication system An optical data communication system using an optical star repeater which converts an optical signal transmitted from a terminal unit into an electric signal, amplifies the electric signal, reconverts the amplified electric signal into an optical signal, ... | 02/17/1987 |
| 4641373 | T-connection fiber-optic repeater A T-connection fiber-optic repeater is used in a fiber-optic network wherein the repeaters are connected by optical fibers to other repeaters and the repeaters are also connected to stars, in such a manner that an optical signal can move from repeater to ... | 02/03/1987 |
| 4581770 | Fail safe repeater for fiber optic bus distribution system Redundant repeaters are positioned along a fiber optic (FO) bus of a data transmission system, each comprising a first star coupler having an input port connected to the FO bus and having N output ports, a second star coupler having N input ports and an o... | 04/08/1986 |
| 4531238 | Statistical contention control for star configured communication networks An active repeater for a star configured communications network includes a threshold detector for collision detection. Whenever two or more terminals simultaneously feed data into the repeater, a threshold sensitive collision detector is triggered to logi... | 07/23/1985 |
| 4306313 | High reliability optical fiber communication system There is disclosed an optical transmission system which employs a plurality of receiver-transmitter pairs. One of the plurality of pairs is selected to propagate optical signals under control of switching means. The optical signal as propagated is monitor... | 12/15/1981 |
| 4257124 | Optical repeater for use in active multiport fiber optic data bus coupler A coupler utilizing a repeater. Dedicated transmit and receive lines interconnect transmitters and receivers with the data bus and, receive lines from other hybrid lines are optically isolated by approximately 23 db from the receiver in the repeater by fi... | 03/17/1981 |
| 4227260 | Electronic active star element for an optical data transmission system In order to more efficiently transmit optical data on an optical data bus to a number of members of an optical data transmission community, an electronic active star element which receives signals from each of a plurality of remote terminals, converts the... | 10/07/1980 |
| 4107518 | Optical repeater An optical repeater combines the functions of a passive star coupler and a signal regenerating amplifier. A divergence corrective device provides a means with which to more effectively utilize the optical energy radiated from a light emitting diode includ... | 08/15/1978 |
| 4002898 | Single mode laser multiterminal optical data communication system A multiterminal single mode communication system using single mode fibers d a single centrally located laser source. An electro-optical switch at the terminal switches pulses of light from the communication channel to a distribution channel comprising a s... | 01/11/1977 |
