Did You Know...
...that in 1800 ether was first used by partyers as a fun diversion? Sniffing the gas led to hilarious and raucous laughter as people watched each other become more and more intoxicated and silly. Several doctors independently realized the value ether would have to anesthetize surgery patients. Of those who claimed rights to the "discovery," none had a happy ending. One had a seizure and died defending his rights. Another spent his life in an asylum because he had been denied acclaim. A third became addicted to chloroform and, in a New York City jail, he soaked a cloth in the drug, severed an artery and bled to death.
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| Number | Title | Issue Date |
| 4514844 | Duplex digital span transmission circuit arrangement In a telecommunications switching system, a thick film digital span circuit arrangement is connected between a digital span and a switching network of the switching system. The transmission circuit arrangement converts unipolar switching network data to b... | 04/30/1985 |
| 4511958 | Common bus access system using plural configuration tables for failure tolerant token passing among processors A data exchange system includes a plurality of data processing partners which communicate with each other via a common bus. Access to communication is sequentially transferred from one partner to another by the generation of an access-passing-on message w... | 04/16/1985 |
| 4502116 | Multiple processor synchronized halt test arrangement A hardware and algorithm synchronizing arrangement comprising a subsystem synchronization interface circuit is disclosed for controlling the testing of multiple interconnected processors. The circuit permits the pausing of one processor to cause the other... | 02/26/1985 |
| 4468734 | Method of purging erroneous signals from closed ring data communication networks capable of repeatedly circulating such signals A method of initializing non-synchronous peer-to-peer data communication rings, and for effecting error recovery in such networks. On detection of error, each station operates in a purging configuration to clear the ring. In the purging configuration the ... | 08/28/1984 |
| 4451916 | Repeatered, multi-channel fiber optic communication network having fault isolation system A repeatered, multichannel fiber optic communication network includes a plurality of full duplex fiber optic channels and one or more auxiliary channels. In order to supervise and control the operation of the network, for both data transmission and fault/... | 05/29/1984 |
| 4442518 | Channel switching system for use in a digital communication system A channel switching method and system for a digital communication system including a repeater station linked with first and second stations and including first and second regular channels and a standby channel in each direction between the repeater statio... | 04/10/1984 |
| 4435704 | Loop transmission system A loop transmission system including a plurality of stations connected in series in a looped transmission line to transfer data among the stations, wherein the stations include a supervising station and at least one terminal station and the transmission l... | 03/06/1984 |
| 4412285 | Multiprocessor intercommunication system and method A system using a sorting network to intercouple multiple processors so as to distribute priority messages to all processors is characterized by semaphore means accessible to both the local processors and the global resource via the network. Transaction nu... | 10/25/1983 |
| 4412281 | Distributed signal processing system A distributed, fault-tolerant, self-repairable, reconfigurable signal processing system with redundant elements comprising signal processors, mass memories and input-output controllers interconnected by redundant busses forming a high reliability system. ... | 10/25/1983 |
| 4410983 | Distributed industrial control system with remote stations taking turns supervising communications link between the remote stations A control system for controlling an industrial process includes a plurality of remotely located process control units (remotes) each coupled to an associated input/output device(s) and adapted to communicate with one another through a dual channel communi... | 10/18/1983 |
| 4402082 | Automatic line termination in distributed industrial process control system A control system for controlling an industrial process includes a plurality of remotely located process control units (remotes) each coupled to an associated input/output device(s) and adapted to communicate with one another through a dual channel communi... | 08/30/1983 |
| 4393492 | Digital subscriber carrier system including drop terminals and bypass and loopback means and alarm indication means A multi-channel digital subscriber carrier system for serving a multiplicity of subscribers one or more of whom may be located at points between the central office and the subscriber (furthest remote) terminal. One or more drop terminals are provided to s... | 07/12/1983 |
| 4390984 | Status check method for a data transmission system In a data transmission system with such a construction that a plurality of terminal units are connected to a first and a second loop transmission line for transmitting messages in a first direction and in a second direction which is opposite to said first... | 06/28/1983 |
| 4380067 | Error control in a hierarchical system A hierarchical communication system has multipaths for different levels of the heirarchy, each set of paths is assigned a criticalness to the successful operation of the system. Error rates for all of the paths are monitored. A threshold for defining an u... | 04/12/1983 |
| 4374436 | System for the monitoring and restoration of series terminals in a looped communication system A loop architecture modification is provided along with a monitoring and control device for unidirectional loop architecture such that failed terminals or loop interconnections may be detected and such that corrective actions may be automatically or manua... | 02/15/1983 |
| 4354267 | Data transmission system utilizing loop transmission lines between terminal units There is disclosed a data transmission system comprising a first and a second loop transmission line for transferring data in its clockwise and counterclockwise directions, respectively. In each loop transmission line a plurality of transmission control u... | 10/12/1982 |
| 4352103 | Industrial control system A control system for controlling an industrial process includes a plurality of remotely located process control units (remotes) each coupled to an associated input/output device(s) and adapted to communicate with one another through a dual channel communi... | 09/28/1982 |
| 4320508 | Self-diagnosing, self-correcting communications network A ring-configured network of multiple inter-communicating data stations in which each data station includes a fault sensing circuit, a test-pulse generating circuit and a switching circuit as well as a transmitter circuit and a receiver circuit, and the t... | 03/16/1982 |
| 4311882 | Method of and arrangement for testing traffic routes in telecommunication networks One central unit (NQTC) provided per network section controls a number of remote units (NQTR) distributed over the network section by transmitting to them all data needed for a sequence of test calls via a switched line. The remote units perform the test ... | 01/19/1982 |
| 4304001 | Industrial control system with interconnected remotely located computer control units A control system for controlling an industrial process includes a plurality of remotely located process control units (remotes) each coupled to an associated input/output device(s) and adapted to communicate with one another through a dual channel communi... | 12/01/1981 |
| 4279034 | Digital communication system fault isolation circuit There is disclosed, for use in a digital communication system, a fault detector circuit operable for removing faulty stations from the system. The disclosed circuit uses a distributed bypass isolation technique and may be used with individual stations or ... | 07/14/1981 |
| 4264894 | Fault bypass for data transmission system An automatic fault detection and modem bypass circuit for a standard land line data transmission system containing a plurality of series connected modems arranged in a conventional hub configuration is disclosed. A relay is located in a central collecting... | 04/28/1981 |
| 4257100 | Electronic data processing system for real time data processing An electronic data processing system for real time data processing compri a plurality of spatially distributed microcomputer stations which work simultaneously in real time especially for process control. The microcomputer stations contain gates between ... | 03/17/1981 |
| 4245343 | Automatic shunt device A system is provided for automatically bypassing an inoperative data terminal so that other data terminals connected in series therewith will continue to receive data transmitted from a central data processor. The system includes data terminal status indi... | 01/13/1981 |
| 4232206 | Signal transmission control system A control system for use with a data transmission system having a plurality of subscriber stations connected exchangeably to a pair of transmission paths comprises a transmission control station provided for each of the transmission paths which produce an... | 11/04/1980 |
| 4190821 | Self-healing loop communications system Primary and back-up closed loop unidirectional transmission lines transmit self-clocking data streams and null data, respectively, in opposite directions to a plurality of loop interface units (LIUs) connected to the primary and back-up lines. To protect ... | 02/26/1980 |
| 4186380 | Multi-terminal computer system with dual communication channels A communication system for linking a central computer to a plurality of remotely spaced terminals employs a single run of coaxial cable formed in a loop extending in the vicinity of each of the terminals with its two ends terminating adjacent the head-end... | 01/29/1980 |
| 4159470 | Data communications systems employing redundant series transmission loops A loop communication system includes a loop controller originating and terminating parallel output multiple bit message frames over a pair of trunks to remote stations, each of which includes a multiplexing connection means to the incoming trunk segments,... | 06/26/1979 |
| 4119815 | Central station system including secondary communication path established through commercial telephone network A central station system in which the central station is normally connected to one or more remotely located bridging points by a dedicated communication path, each bridging point having a plurality of output ports to which one or more remote station devic... | 10/10/1978 |
| 4093981 | Data communications preprocessor A microprogrammable data communications preprocessor exercises detailed control over a multiplicity of data lines communicating with a microprogrammable central processor while requiring central processor attention on a message basis only. Further minimiz... | 06/06/1978 |
| 4035770 | Switching system for use with computer data loop terminals and method of operating same A switching system for use with a plurality of data terminals connected in series in a loop, the ends of which are connected to a central computer so that the central computer may communicate with the data terminals, the system comprising a plurality of s... | 07/12/1977 |
| 4028676 | Control of peripheral apparatus in telecommunication Methods and apparatus are disclosed for controlling peripheral units in a telecommunication system by means of two or more like control apparatus, wherein the peripheral units are assembled in groups, each of which is associated with its own switching mea... | 06/07/1977 |
| 4017828 | Redundancy system for data communication A redundancy system for data communications upon two duplicate communication channels, each having transmission and reception circuits, characterized by a switching circuit for selecting one of said two communication channels, a single error detection cir... | 04/12/1977 |
