Abstract: A method and apparatus for processing a character for anti-aliased display on a raster output device. A set of density values is computed for a set of raster positions to represent the character and the density values of the set are scaled to extend their range upward toward a maximum density value, whereby generally at least one of the density values of the set becomes the maximum density value. In one embodiment, the set of density values is computed from a rendering of the character at resolution higher than the resolution of the output device. In another embodiment, the character is created by a font having font metrics including a reference dimension, and the density values are scaled by computing adjusted values as a non-decreasing function of the original values, the function being defined to compute a maximum adjusted density value for at least one non-maximum density value.

Abstract: A high speed pseudo-, 8-, 16-, or greater, ported cache memory, and associated effective address generation scheme. Based upon either two-port building blocks, or twice as many single-port building blocks, which are interleaved, the cache memory is arranged as a functional equivalent to a true 8-, 16-, or greater ported interleaved cache memory.

Abstract: A circuit breaker is equipped with a current limiting arc runner for effective overcurrent interruption without additional heating under quiescent operating conditions. Upon contact separation, an arc is drawn with the endpoints of the arc being initially rooted on the set of open contacts. Further opening of the contacts commutates the arc onto the current limiting arc runner to suppress the circuit current.

Abstract: Systems are provided for saving register data in a pipelined data processing system, and for restoring the data to the appropriate register in the event of an exception condition. One embodiment concerns a latch feedback assembly, such as a SRL, which includes multiple series-connected latches having a feedback connection between last and first latches. The latches are clocked to temporarily reserve a delayed backup copy of data from the first latch on the last latch. Upon detection of an exception, the backup copy is first preserved by disabling writes to the last latch; then the backup copy is copied to the first latch to restore the first latch to its state prior to occurrence of the exception. Another embodiment involves a register file save/restore mechanism, in which an additional bank of registers, called a "backup register", is coupled to a register file. When data is stored in an address of the register file, the address and its data content are also stored in the backup register.

Abstract: Compile and/or run time instruction scheduling is used in a multiprocessing system to reorder memory access instructions such that a strongly consistent programming model is emulated in a fashion transparent to the programmer. The multiprocessing system detects potential shared memory conflicts, avoiding these conflicts by restarting operation of the affected processing unit at a predetermined previous state, previously archived in a rollback register set, and resuming instruction execution from that state.

Abstract: A compact current limiting circuit breaker is equipped with a current limiting shunt for effective over-current circuit interruption. The circuit breaker trip unit responds to long time, short time and instantaneous over-current conditions by opening a set of contacts to isolate the protected circuit. Upon contact separation an arc is drawn, with the endpoints of the arc being initially rooted on the pair of open contacts. Further opening of the contacts commutates the arc into the current limiting shunt to redirect the current away from the trip unit and suppress the arcing current until the circuit breaker contacts are sufficiently open to isolate the protected circuit.

Abstract: A compact current limiting circuit breaker utilizes a polymer current limiter, an arc rail and an arc gap for effective overcurrent protection. Upon the occurrence of contact separation an arc is drawn between the circuit breaker contacts and driven toward an arc rail. Commutation of the arc from the stationary contact to the arc rail effectively changes the current path to incorporate the polymer current limiter which rapidly suppresses the overcurrent. Circuit isolation is achieved by extinction of the arc within the arc gap between the movable contact and the arc rail.

Abstract: A memory architecture and method of partitioning a computer memory. The architecture includes a cache section, a setup table, and a compressed storage, all of which are partitioned from a computer memory. The cache section is used for storing uncompressed data and is a fast access memory for data which is frequently referenced. The compressed storage is used for storing compressed data. The setup table is used for specifying locations of compressed data stored within the compressed storage. A high speed uncompressed cache directory is coupled to the memory for determining if data is stored in the cache section or compressed storage and for locating data in the cache.

Abstract: A CPU of a computer system utilizing a VLIW architecture comprises an instruction register, an instruction sequencing unit, a bank of data registers, a set of arithmetic/logic units (ALUs), and instruction decode logic. The bit positions in the instruction register correspond to a set of parcels or fields, each parcel corresponding to a different respective one of the ALUs. The operation, if any, performed by each ALU during a machine cycle is specified by the parcel corresponding to the ALU. Each parcel of an instruction may contain such information as an operation code (op code), source and destination registers, special registers, immediate data, storage addresses, etc. In order to reduce the total number of bits required to store an instruction, at least some of the bit positions required to specify such information to the instruction decode logic are implied by the position of the parcel within the instruction word. Preferably, multiple-way conditional branches may be specified in each instruction word.

Abstract: Systems are provided for saving register data in a pipelined data processing system, and for restoring the data to the appropriate register in the event of an exception condition. One embodiment concerns a latch feedback assembly, such as a SRL, which includes multiple series-connected latches having a feedback connection between last and first latches. The latches are clocked to temporarily reserve a delayed backup copy of data from the first latch on the last latch. Upon detection of an exception, the backup copy is first preserved by disabling writes to the last latch; then the backup copy is copied to the first latch to restore the first latch to its state prior to occurrence of the exception. Another embodiment involves a register file save/restore mechanism, in which an additional bank of registers, called a "backup register", is coupled to a register file. When data is stored in an address of the register file, the address and its data content are also stored in the backup register.

Abstract: A single-sized circuit breaker electric isolation block provides both electric insulation between the circuit breaker operating mechanism as well as mechanical support to the circuit breaker contact arm assembly over a wide range of circuit breaker ampere ratings. The isolation block is formed from a plastic composition and is shaped to receive the circuit breaker operating mechanism connector link for each phase of a multi-phase circuit breaker assembly. The positional relationship on the block accommodates the connector links used with a wide range of circuit breaker ampere ratings.

Abstract: Each pole of a multi-pole circuit breaker is equipped to individually separate the circuit breaker contacts within each pole upon overcurrent occurrence. A digital processor within the circuit breaker trip unit determines the occurrence of zero current crossing of phase current within the individual poles and initiates contact separation at zero current values.

Abstract: A magnetic flux concentrator trip unit for molded case circuit breakers in the form of a flux concentrator magnet arranged round the load strap at one end of the circuit breaker is positioned in magnetic proximity to an armature. Current transport through the load strap generates attractive magnetic forces to articulate the circuit breaker operating mechanism when the current exceeds a threshold value.

Abstract: A high strength operating cradle assembly for an industrial rated circuit breaker operating mechanism wherein the rotational action of the cradle about its pivot is controlled by interconnected operating mechanism links is disclosed. Axial positioning of the cradle on its pivot is maintained by the capture of a positioning track on the cradle pivot within a pair of guide rails on a guide pin extension on the cradle.

Abstract: A high speed register file is provided for use with Very Long Word Instruction (VLIW) and N-way superscaler processors. The high speed register file includes a selected number of copies of a general purpose register (GPR) building block. The GPR building block includes at least two interleaved sub-banks of registers. Each of the sub-banks includes a number N of write ports and a number M of read ports. The sub-banks are interleaved by write ports and have non-interleaved read ports.

Abstract: A fully automated circuit breaker saddle assembly in the form of a plastic support base having modular components that define the end and central sections of the support base. The components are snappingly fitted together and are retained by means of formations on the ends of the respective components. The metal circuit breaker stab assemblies are attached to the base by connectors integrally-formed in the base.

Abstract: A molded case circuit breaker and current suppressing unit protects an electric motor without tripping during motor current reversal. Upon the occurrence of a short circuit within the protected circuit, the current suppressing feature rapidly suppresses the let-through current until the circuit breaker responds to isolate the protected equipment. Power is restored to the protected equipment without the need to replace any of the current suppressing unit components.

Abstract: The contact depression effected between the fixed and moveable contacts in a high ampere-rated circuit breaker is fixed after assembly of the current carrying components by the provision of a multi-dimensional contact carrier support bearing. The selection of the support bearing dimension fixes the height of the movable contact arm and the attached movable contact relative to the subjacent fixed contact. Control of the contact depression improves circuit interruption efficiency and extends the operating life of the circuit breaker contacts.

Abstract: An industrial-rated circuit breaker includes an electronic trip unit for long time, short time and instantaneous overcurrent protection. Current transformers contained within the circuit breaker enclosure sample the circuit current and supply the trip unit with signals indicative of the circuit current in real time. Upon receipt of an overcurrent condition the trip unit actuates the circuit breaker operating mechanism to separate the circuit breaker contacts for circuit interruption. A supplemental magnet trip actuator interacts with the current transformer and the operating mechanism to provide enhanced short circuit response.

Abstract: An optical fiber element includes an optical fiber having a numerical aperture ranging from 0.08 to 0.34 and a protective coating affixed to the outer surface of the optical fiber. The protective coating has a Shore D .?.hardnees.!. .Iadd.hardness .Iaddend.value of 65 or more and remains on the optical fiber during connectorization so that the fiber is neither damaged by the blades of a stripping tool nor subjected to chemical or physical attack.