Abstract: A vibrating fluid density transducer 10 provides a gas density measurement D, used in conjunction with a flowmeter signal f.sub.B to meter the mass of gas fed through a pipeline. D is subject to errors dependent upon the velocity of sound C in the gas. The errors are corrected to yield Da by application of a correcting formula (block 18) in which C is introduced by calculation (block 17) from a measurement of gas pressure P by a transducer P. The value of C may alternatively be measured directly, computed from a measurement of specific gravity or in the case of a liquid, be inferred from D or be preset.

Abstract: The effects of any errors in the preliminary tracking of a target, and of any subsequent changes in the velocity of the target, are included in simulated firing of a gun 3, by slewing a laser projector 2 in the simulator for the predicted shell time-of-flight at the rate assessed during the preliminary tracking and then scanning with the laser for hit/miss determination. The slewing is achieved either by having the gun control system slew at the required rate, or by having the gunner continue tracking the target, corrections for deviations from the required rate being automatically applied to the projector.

Abstract: Directional relay and method for monitoring at least one A.C. power transmission line to determine the position of a fault on the line with respect to a measurement location thereon.According to a representative embodiment characteristic parameters, typically the respective phases, of a first signal representing the difference of complex voltages after and before the occurrence of the fault and of a second signal representing the line current after the occurrence of the fault, are compared, the result of the comparison providing the desired indication.

Abstract: A single patch on an integrated circuit is arranged to patch any one of four different logical states into the circuit, according to whether the pin is grounded, floating, coupled to a supply rail via a resistor, or coupled to the supply rail directly. In one embodiment, the voltage thresholds of three transistors are arranged so that they switch on successively in response to successively higher voltages on the patch pin, thereby controlling the binary logic signals at each of two output points in the circuit; in the other embodiment, multi-emitter transistors are arranged with differing current thresholds to achieve the same result.

Abstract: For initial alignment of a simulator laser-projector with a weapon, the weapon is boresighted on a target, the projector is fitted and the laser beam is scanned stepwise across the target successively along orthogonal axes. The range of steps on each axis for which a return from the target occurs is sensed, and the step corresponding to the median of all the returns taken as the position for which the laser beam is centered on the target. These calculated positions are stored and used as the reference positions during simulated firing of the weapon. The detection of the position of a target for hit/miss determination is achieved with the same scanning and median selection procedure.

Abstract: The temperature of the condensation point of light hydrocarbons in a gas is quickly determined by heating a frosted mirror placed in a gas swept enclosure up to the evaporation temperature of all the heavy and light hydrocarbons. The mirror is first cooled as quickly as possible to a temperature higher than the presumed condensation temperature for the light hydrocarbons. Then is cooled much more slowly until the appearance of the first condensations on the mirror. Another cycle as described above is started, in which the presumed condensation temperature value is taken as being equal to the condensation start temperature value of the previous cycle.

Abstract: A high density solder tail connector assembly for leadless integrated circuit packages. The plastic connector package includes upper and lower header portions each having a plurality of mating terminal reception channels formed therein. The upper header portion includes probing holes to allow ready testing of integrated circuit packages mounted on the connector assembly. Each channel is designed to receive an inner and an outer type of S-shaped spring-beam contact. Each type of unitary contact includes a contacting portion, a generally S-shaped spring-beam portion, a probe portion, a base portion, and a solder tail or wire-wrap portion. The two types of contacts differ with respect to the location of the solder-tail portion.

Abstract: A high density double contacting connector assembly for leadless integrated circuit packages. The plastic connector package includes upper and lower header portions each having a plurality of mating terminal reception channels formed therein. The upper header portion includes probing holes to allow ready testing of integrated circuit packages mounted on the connector assembly. Each channel is designed to receive an S-shaped spring-beam contact. Each type of unitary contact includes an IC terminal contacting portion, a generally S-shaped spring-beam portion, a probe portion, a base portion, and a circuit board contacting portion. Each contact is provided with U-shaped pivot on the base portion for engaging a wall of the terminal reception channels. Preloading means formed in the upper header portions insure that all contacts are automatically preloaded when the upper and lower header portions are secured together.

Abstract: Character recognition apparatus and a method for identifying machine-printed and hand-printed characters. A character is optically scanned and converted to a rectangular matrix representation containing black and white points. The matrixed character is pre-processed by a non-iterative line-thinning technique so as to reduce the stroke width to no more than two points along the center line of the matrixed character. Isolated black points formed in the process of thinning the strokes are removed. Any gaps in the center-line of the matrixed character are filled and the edges of all long strokes are smoothed.The thinned character matrix is divided into a plurality of regions. One of a set of predetermined stroke features of the character matrix is extracted by scanning subregions of the character matrix such that the center position of the scanned subregions will have occupied all elements of the character matrix after one complete scan.

Abstract: An organization for a single chip calculator/controller which reduces the number of interconnections necessary in an integrated circuit chip. The single chip calculator/controller comprises an arithmetic logic unit (ALU) and a plurality of active storage elements all interconnected in parallel via an input bus and an output bus. Instructions contained in a read only memory (ROM) are read out into an instruction register. A first means is provided for decoding a portion of the instruction to generate a configuration signal for selectively configuring the logic elements of the ALU. A second means is provided for decoding the remainder of the instruction to generate a register select signal for selectively actuating a chosen storage element. The calculator/controller system also includes data clocking and input/output means. The centralization of the logic functions in the ALU allows any instruction to act upon the data contents of any active storage element.

Abstract: An adjustable magnetic bias field structure for magnetic bubble devices. A pair of parallel facing magnetically permeable plates are adjustably separated by a number of threaded magnetically hard cylindrical rods or slugs slotted at one end. Threaded plastic rings fastened around holes provided in the pair of permeable plates engage the threads of the slotted rods to provide the adjustment feature. A magnetic bubble device is placed between the two permeable plates.

Abstract: A structure for an easily testable single chip calculator/controller comprising an arithmetic logic unit (ALU) and a plurality of active storage elements all interconnected in parallel via an input bus and an output bus. Instructions contained in a read only memory (ROM) are read out into an instruction register. A first means is provided for decoding a portion of the instruction to generate a configuration signal for selectively configuring the logic elements of the ALU. A second means is provided for decoding the remainder of the instruction to generate a register select signal for selectively actuating a chosen storage element. Two test pins are provided, one placed in the input bus and the other placed in the output bus. The test pins are placed in the test mode by the application of a TEST signal to their terminals. Signals from the test pins will be routed to outside diagnostic or testing equipment.

Abstract: Bursting apparatus for continuous forms having modular guiding, trimming, bursting, and decollating units. A folding forms tray is provided to hold forms to be burst. Paper feeding and guiding is accomplished by the use of laterally adjustable curved, flanged guide means coacting with spring loaded hold-downs. Margin trim cutters and a center slitter are also provided. Forms width and margin trim adjustments are readily accomplished through the use of novel leaf-spring clamping means coacting with transverse guiding means.The bursting unit has fixed high speed rollers and movable low speed rollers with a bursting blade having plural arcuately shaped bursting areas attached thereto. The low speed rollers are mounted on a movable carriage which is adjustably spaced from the fixed high speed rollers by means of two parallel threaded rods.

Abstract: A system is described for testing electrical circuit units, particularly printed circuit cards having a plurality of plug-in connector terminals.The testing system is first operated in the Generation Mode wherein it generates a reference test pattern produced from a series of test stimuli applied sequentially to a reference card, and stores the pattern in a bulk memory, the pattern being in the form of a series of words identified by the part number of the respective card and containing the test stimuli and the responses thereto from the reference card. To test a production card, the system is operated in the Test Mode, wherein the stored test pattern generated from the corresponding reference card is extracted from the bulk memory and the reference responses are compared in a GO, NO-GO testing operation with the actual responses produced when applying the same test stimuli to the production card.

Abstract: Sheet handling device useful for handling sheets to be processed by data processing apparatus, such as a ledger accounting machine. The device includes a main hopper compartment into which documents to be processed are manually deposited, an auxiliary hopper compartment for blank documents, a main stacker compartment into which processed documents are automatically advanced, a stacker ram in the main stacker compartment to compact documents as they are stacked, an auxiliary stacker compartment for accumulating completely filled processed documents for subsequent manual removal, and a document hold station for temporarily storing partially processed documents pending the generation of data to be recorded in summary thereon.

Abstract: Described is a transducer head assembly for magnetic disk files, the assembly using the informational data itself recorded on the disk in the form of a plurality of annular tracks for precisely positioning the head assembly with respect to the individual tracks. For this purpose, the assembly includes an upper head cooperable with the upper face of the record disk and a lower head cooperable with the lower face of the record disk, the lower head being spaced from the upper head one-half the distance between a pair of adjacent tracks such that one head may be used for positioning purposes by centering same between two adjacent tracks on the respective face of the disk, while the other head, being thereby centered with a track on its respective face of the disk, may be used for recording, reproducing or erasing data with respect to the latter track.

Abstract: The recorded data is also used for positioning purpose, accordingly the data on adjacent tracks is recorded at different clock frequencies so that the data on one track can be discriminated from the data on the other track.

Abstract: A switching circuit for controlling the selective electrical energization of a resistive or inductive load by an AC power source such that a switching operation is performed only when the current from the AC power source is nearly zero. Pulses synchronous with the zero crossings of the AC power source are used to trigger one-shots to effectuate appropriately gated delay pulses when the switching circuit is ON and OFF, respectively. A latching circuit connected to an ON-OFF switch activates and deactivates the switching circuit.