Abstract: A cartridge which contains two spools. The supply spool has wound about it a printing ribbon and the take-up spool being used for wrapping the used ribbon. The cartridge has a ribbon exit at one location and a ribbon entry at a remote location to define a path for the ribbon to pass therealong. Two drive gears are engaged with each other and a pressure roller. The drive gears are located and their lower portions are configured to engage the respective drive shafts of various printers. When the first drive gear is driven by a printer, the second gear, which includes the drive wheel, rotates in the opposite direction of the drive shaft of the printer. When the second gear is driven, the integral drive wheel rotates in the same direction as the drive shaft of the printer. The pressure roller is provided with internal flexible spokes, or springs, and provides a self-adjusting bias against the drive wheel to drive the ribbon and provides an extremely efficient pinching action.

Abstract: An annular rotary RF coupler for installation about a vertical support structure, such as the mast of a ship. Two annuli are divided into circumferential increments providing a cellular structure of individual waveguide cross-sections. A lower annulus (stator) remains fixed, the individual waveguide sections therein being fed from a power-divided, equal-phase, feed configuration. The oppositely facing upper annulus (rotor) rotates with respect to the lower one about the common mechanical center of rotation of a mechanically rotating antenna system. Connection to the rotating waveguide sections may be through power combiner/divider means, or individual subarrays may be discretely connected to one or more waveguide sections in the rotating annulus. For power tapering across an antenna array aperture, the waveguide section dimensions in the circumferential direction within the rotating annulus are appropriately tailored.

Abstract: A daisywheel printer having interchangeable modules for different respective communications with alternate corresponding plug-in connections.

Abstract: An annular rotary RF coupler for installation about a vertical support structure, particularly the mast of a ship. Two annular volumes are regularly divided into circumferential increments providing a cellular structure of individual waveguide cross-sections. A first annulus (stator) remains fixed, the individual waveguide sections therein being fed in equal phase from individual solid-state transmit/receive modules. The oppositely facing annulus (rotor) rotates with respect to the first annulus about the common mechanical center of rotation both share with a mechanically rotating antenna system. Connection to the rotating waveguide sections may be through power combiner/divider means (more than one rotor cell per antenna element or subarray), or individual antenna elements or subarrays may be discretely connected to corresponding waveguide sections in the rotor.

Abstract: A densitometer for use by itself or in a net oil computer. The densitometer includes two differential pressure units to detect the difference in pressure between two corresponding pairs of points and the differences substracted to provide a corrected density output signal. This output signal is then essentially independent of viscosity and/or other variables.

Abstract: Located adjacent to runways, taxiways, and approach ramps are secondary radar interrogators which radiate the P1 and P3 pulses and the P2 pulse via different directional patterns into sectors to be monitored which are individually assigned to each interrogator. Direction finders at different locations determine the directions of arrival of SSR reply signals radiated by an airborne SSR transponder in a sector to be monitored. From the directions of arrival and the locations of the direction finders, the respective transponder position is determined. The interrogators require no central control. Alternatively, the arrival times of the SSR reply signals are measured at several points; an evaluating device forms the differences in arrival time, and the intersection of the hyperbolic lines of position determined in the evaluating device is the position of the transponder.

Abstract: A bluff body is placed in a fluid pipe with one flat face facing the oncoming fluid. Vortices are then generated and shed alternately from opposite edges of the body. This body is of a scalene triangle cross section, and in one version a hole extends transversely therethrough. A longitudinal hole intersects the first hole at right angles thereto. The vortices cause oscillations in the transverse hole. A light beam is provided in the longitudinal hole. The light beam is modulated as it crosses the path of the transverse hole. Hence by measuring the frequency at which the beam is modulated and by suitable calibration, one gets a good and reliable indication of fluid flow rate. In a second version the transverse hole is formed into a blind hole at the foot of which is an etalon (a Fabry-Perot interferometer). The effect of the fluid oscillations due to vortex generation influences the etalon so that its output is a measure of the fluid flow rate.

Abstract: A tool is disclosed for helically winding the strength member of a fiber optic cable around a clamp sleeve and thereafter pushing a crimp sleeve over the helically wound strength member while holding the strength member in place on the clamp sleeve.

Abstract: The metal substrate of an electrophotographic member is provided with a selenium-tellurium alloy layer containing 5-30% tellurium, 10-5,000 ppm of a metallic element of the fifth main group, and 10-100 ppm of a halogen. A preferred embodiment contains 15% tellurium, 40 ppm arsenic, and 40 ppm chlorine. The addition of the metallic element of the fifth main group to the selenium-tellurium alloy results in a stabilization of charging potentials in multicycle operation.If the metal substrate is an aluminum drum, the electrophotographic member can be used as a copying drum in high-speed copiers.

Abstract: A monitor located about 100 m from the ILS localizer determines whether the DDM alarm threshold was exceeded due to an equipment error or to an error caused by an overflying aircraft. To accomplish this, either the maximum of the frequency spectrum of the variation with time of the differentiated DDM signal is located, or the frequency spectrum of the variation with time of the DDM signal or of the differentiated DDM signal is compared with one or a plurality of spectra typical of equipment errors or of errors caused by overflying aircraft.

Abstract: Two STC configurations for precision control of RF attenuators, each configuration utilizing a log-scale electronic attenuator, are disclosed. The first configuration includes a D/A converter/linear-to-log module combination to provide a log range ramp; the second configuration utilizes a log table ROM/D-A converter to provide a precision log range ramp, the range so generated controlling the log-scale electronic attenuator utilized in the radio frequency receiver.

Abstract: An optical switch comprising a controlled ferroelectric light permeable ceramic provided with electrodes. To simplify the manufacture and to realize a larger switch, the invention provides a baseplate with electrodes and the ferroelectric ceramic is secured thereon in the form of one or more strips.

Abstract: An internally electroded smectic liquid crystal display cell having a layer of a smectic material sandwiched between two electroded plates having electrodes that overlap at least in part wherein each said electrode is covered with an electrically insulating coherent layer whose surface has been treated to provide it with a rough texture provides a liquid crystal display cell of low voltage threshold characteristics.

Abstract: A quartz tuning fork in a chamber adjacent a gas pipeline carrying a turbine flowmeter. The chamber is connected across the flowmeter turbine to receive a gas at a flow rate high enough to cause the tuning fork to vibrate. A main output frequency is developed which is directly proportional to the product of a function of the tuning fork period of vibration and the turbine meter output signal frequency. The main output frequency is then counted and is displayed on an indicator, the constants of the circuit being so selected that the indicator displays total flow in units of mass. The density sensor measures the gas density at the turbine flowmeter rotor location. This obviates the requirement for expansion factor corrections.

Abstract: A modulator for RF class C amplifiers particularly suitable for transistor power stages employing FAIL-SOFT. Automatic modulation control operates to independently adjust the gains of a pair of controllable amplifiers whose outputs are then combined, filtered and applied to a class C stage. The output of the class C stage is sampled, linearly detected and processed to produce gain control time-voltage functions which compensate for class C pulse distortion so that a preserved amplified waveshape can be obtained.

Abstract: A directive antenna feed arrangement providing for multiple selectable beam locations and with the ability to provide multiple and independently locatable nulls in specific angular directions in the sidelobe structure of the radiation pattern. An antenna having a plurality of independent antenna elements linearly deployed is coupled to a beam-forming network such as a Rotman lens feed. Main beam directivity is controlled by selection of the Rotman lens ports corresponding to the desired beam direction. Other angles corresponding to the directions of unwanted signals, especially those received on the major sidelobes, are effectively nulled by a phasing network discretely connected to the Rotman lens port at the appropriate angle, the phase control receive signals being mixed with the main beam signal energy. Angle tracking and beam-steering circuits are depicted and described for control of the main beam angle and positioning of the nulls generated.

Abstract: A geophysical connector is disclosed which may be utilized in extreme climatic conditions that is readily field repairable without disrupting the sealing characteristics of the connector. The connector employs an auxiliary harnessing system for coupling the conductors of a cable to the contacts of the connector.

Abstract: Apparatus used in conjunction with printer document feed mechanisms for allowing the dynamic adjustment of the feed mechanisms while paper feed is occurring, thus adjusting paper tension. The apparatus has a linear adjustment capability over its total range. In particular, adjusting levers are attached to the feed mechanism support shaft, pinions being attached to each end of the shaft. The pinion teeth mesh with the teeth of racks attached to each side plate of the feed mechanism. As the adjusting levers are moved, the support shaft and pinions rotate. The rotation of the pinion meshing with the rack causes the support shaft (and feed mechanism) to move, changing the distance between the feed mechanism and the printer platen. This distance, and paper tension, vary linearly with the angular position of the levers. The paper tension can be adjusted while the feed mechanism is operative.

Abstract: A submersible pumping system especially adapted to cryogenic storage systems which includes a single fluid transmitting casing extending from the top to near the bottom of the storage container, a normally closed spring biased foot valve on the bottom of the casing, a sealing gland closing the top of the casing having a shiftable portion, and a pump and motor unit suspended through the shiftable portion of the sealing gland in the casing and adapted to open the foot valve. The pump and motor unit is centered in the casing and aligned with the foot valve by mating frusto-conical collars associated with the pump and motor unit and with the valve assembly. The shiftable sealing gland allows the pump and motor unit to be lifted off the foot valve so as to close the valve without venting the casing.