Abstract: A system for providing multiple traversal illumination of a region with a beam of radiation wherein the illumination provides substantial but not complete overlap at each repeated pass of the beam throughout the region. Because there is a slight shift in direction of the beam on each traversal of the region, it is possible to apply the beam and extract it after a predetermined number of traversals, and means are provided for this purpose. In addition, more than one beam may be applied to the same region, each having a different, predetermined number of traversals before extraction. In this manner, a form of beam combination is achieved.

Abstract: The muffler has an inner exhaust gas pipe and an outer casing. The inner pipe has a diameter which expands conically by about 6% between the input to the output ends of the casing. The inner pipe is also provided with longitudinal wall slots measuring about 30 mm by 2 mm and having a lip extending outwards toward the casing. The space between the inner pipe and the casing is filled with stainless steel wool. High frequencies of the vibrations in the exhaust gas are passed through the slots without appreciable gas flow through the slots, and their energy is dissipated in the wool. The wool is held in place by a metal strap wound helically on its edge about the inner pipe and welded to it. The casing is in two split halves which are held together against the inner pipe by a friction clamping element to permit differential expansion between the inner pipe and the casing.

Abstract: The present invention relates to a road sweeping broom constituted by a handle and a bundle of fibres fixed at one of its ends; according to the invention, the fibres of the bundle are constituted partly by synthetic fibres and partly by vegetable fibres. These fibres are bound together at one of the ends of the bundle and at least in one other zone distinct from said end. The invention finds particular application in the domain of highway equipment.

Abstract: A yoke assembly for an aviation flight simulator capable of generating the appropriate control signals and mechanical responses for realistic flight simulation, including trim adjustment. In a preferred embodiment, the assembly comprises a rotatable and axially movable yoke shaft extending in an axial direction; a pair of sliding blocks mounted to be movable in the axial direction; a first spring rotationally coupling the yoke shaft with a first sliding block for simulating the rotational restoration force on an aircraft yoke; a second spring axially coupling the yoke shaft to the second sliding block for simulating the axial restoration force on an aircraft yoke; and adjustment means for adjusting the axial position of the second sliding block for simulating the effect of trim adjustment of an aircraft.

Abstract: For use in an electronic security system for detection of a resonant tag, an antenna system has a transmitting antenna and a receiving antenna at least one of which includes two or more twisted loops lying in a common plane with each loop being twisted 180.degree. to be in phase opposition, and a conductive shield enclosing each twisted loop antenna. The conductive shield has a grounded shorted turn portion enclosing the periphery of the antenna, and a shield portion enclosing the crossed conductors of each pair of twisted loops, this latter shield portion being insulated from the shorted turn portion to prevent current flow in the crossover shield portion.

Abstract: A CO.sub.2 laser capable of emitting at 16 microns in the transition from the 02.degree.O to the 01'0 energy levels. The laser is particularly adaptable for use in laser enrichment to photoexcite uranium hexafluoride molecules. The CO.sub.2 medium is originally excited to many levels above and including the 02.degree.0 level. De-excitation to the 02.degree.0 level is induced from several upper levels populating it highly for improved laser gain. The transition between the 02.degree.0 and 01'0 levels at 16 microns is then permitted by depopulating the 01'0 level with 5 micron radiation from a CO laser. In the preferred case, excitation of the CO.sub.2 medium is by an electronic discharge, and all levels are excited from the ground state by the discharge without selectivity. The pumping from the terminal 01'0 level maintains the inversion for 16 microns lasing.

Abstract: A system for correcting misalignment and divergence in a long, propagating beam of radiation as is typically applied through a plurality of chambers to produce isotopically selective photoexcitation in a system for isotope separation. The corrective apparatus comprises a reflective relay system placed at predetermined intervals along the path of propagation of the radiation where correction of alignment and/or divergence are required. The reflective relay includes a concave mirror employed to correct divergence and which receives radiation directed at it by a first plane reflective surface which in turn responds to the radiation on the path of propagation. The concave mirror reflects toward a second plane mirror which in turn reflects the radiation back onto the path of beam propagation with correction of alignment and divergence.

Abstract: The disclosed treatment is for the removal of hydrogen halide constituents of an exhaust gas by means of a dry scrubbing agent to which the gas binds. The agent is sprayed into the gas in finely divided form just prior to flow of the gas through a register located at the entrance to a filter chamber. The agent is thus distributed evenly over the input of the filter and performs its binding function primarily while on the filter. The agent may be sprayed as a finely divided solid or as a fluid which rapidly dries to leave a coating of finely divided agent on the filter.Also disclosed is an apparatus for practicing the method, including a nozzle casing with a plurality of spray nozzles located in the gas passageway at the input side of a register at the entrance to the filter chamber housing an electrical filter.

Abstract: An antenna system for an electronic security installation comprising a pair of substantially identical planar multiple loop antennas respectively connected to the transmitter and receiver of the security system and providing an electromagnetic field of high intensity only in the interrogation region of the system while also discriminating against interferring signals originating outside of the interrogation region. Each planar antenna includes two or more loops lying in a common plane with each loop being twisted 180.degree. with respect to each adjacent loop to be in phase opposition. The transmitting antenna and receiving antenna are substantially identical in size and configuration, and each antenna has a total loop area of one phase equal to the total loop area of opposite phase.

Abstract: Capacitance measurement apparatus in which an output signal representative of the capacitance of a capacitor under test is provided without requirement for absolute measurement of the voltage level or absolute measurement of time interval. A first signal is provided representing the voltage difference between the charge levels of the capacitor. A second signal is provided representing the average current from the capacitor during the time interval that the capacitor undergoes a change in its charge states. The ratio of the second signal to the first signal is representative of capacitance.

Abstract: A subminiature rotary coded switch having a dual-in-line configuration. Flexible contacts making electrical connection with the dual-in-line terminals of the switch are mounted within a stationary body. A drum-shaped detenting cover has printed circuitry on its inner cylindrical surface, typically in the form of a flexible printed circuit board. The cover rotates the flexible board with respect to the body, producing a wiping action with respect to the flexible contacts, thereby producing the desired switching operations. Each such switch can be electrically equivalent to four single-pole double-throw switches and two of the switches of this invention can be mounted in one conventional 14-terminal dual-in-line array of holes in a printed circuit board.

Abstract: A ventilator, in particular for an air shaft of a space to be ventilated on board a vessel, said ventilator comprising a box-shaped housing that is at least partly open downwards, and a hood-shaped part continuous with said housing and in open communication therewith, which hood-shaped part is open outwards on one side. In order to substantially decrease, or fully prevent the ingress of water in the air shaft through the ventilator, there are provided in the housing at least one horizontal longitudinal partition and at least two transverse partitions continuous therewith and extending in substantially vertical and opposite directions, said partitions dividing the housing in two parts, said longitudinal partition having an opening therein that can be closed by means of a float.

Abstract: The chair has a hinged seat which can be pivoted into an upright position and a tubular frame with a configuration permitting stacking of chairs when the seats are upright. The upright tubular frame portions have telescoped sections on each side to permit vertical adjustment of the chair. Seat support clamps attached to the outer tube have locking pins for holding the desired vertical position. A pair of telescoped tubes are hinged to each clamp and a seat fixed to the outer ones. The inner tubes of the pairs are connected together parallel to each other by a transverse member. A turnbuckle is connected under the seat between the middle of the cross transverse member and the seat to permit forward and backward adjustment of the seat. Particular features are disclosed for the seat support clamps for making the adjustments easier.

Abstract: The booklet has a refillable binder in which there are writing sheets and opened envelope-forming sheets with a gummed perimeter region bound to the cover by demountable binding rings passing through slots in a stub section. Each sheet and each envelope is separable from the stub section by a perforated tear line. The sheets, as well as the envelopes, are provided with embossed fold lines such that with a sheet lying on an envelope, the folding of the sheet and the folding of the envelope about the sheet can be done simultaneously. Sheet and envelope are torn in assembled form from the binder in a single tearing motion along a perforated line. Another perforated line is provided along one end of the envelope for opening after it is sealed.Also described is a plastic binding ring which is made up of two identical halves of extruded plastic having interlocking butt joints which snap together.

Abstract: Method and apparatus for measuring cardiac output in which a traceable signal in the form of thermal energy or an injectate is applied to the blood flow through the heart having a plurality of frequency components with the traceable signal detected at a heart output vessel and analyzed at the plural frequency components to provide cardiac output rate and ejection fraction information. The traceable signal is preferably heat energy applied as a very low frequency modulation of a high frequency signal at a fundamental and further harmonic or as a square wave in which multiple harmonics are present. At least two frequency components of the square wave are then separately analyzed. A multiple frequency system in addition to permitting analysis of previously undetectable heart output characteristics additionally permits determination of whether the source of the traceable signal is properly located within the heart such as in the ventricle.

Abstract: An electrical contact adapted to be mounted in a plated-through hole and having means to improve solder wicking and degassing. A conical transitional surface between the bottom of the contact body and the solder tail is provided with a plurality of projecting ribs. When inserted in a plated-through hole, because the body is larger than the hole, the ribs rest on the rim of the hole and provide degassing paths between them. The contact may be mounted individually in electrical panel boards, or in arrays in insulators wherein the contacts receive the leads of dual-in-line packages or other electronic components.

Abstract: For use with a resistance level and temperature sensor, operative to provide a measure of the level and temperature of a fluent material, a readout and alarm system operative to provide a numerical readout of material level and temperature as well as visual and audible indications of alarm conditions. The system is contained within a portable housing which can be employed in hostile environments and which can provide intrinsically safe operation in explosive atmospheres.

Abstract: An electroacoustic transducer especially for use in intrusion alarm systems and comprising a metal diaphragm having a thickness-poled piezoelectric ceramic disk bonded to the center thereof and having an electrode surface in contact with the metal diaphragm. An integral tab outwardly extends from the diaphragm to provide one electrical terminal, while the other electrical terminal is provided by a flexible electrical ribbon connection to the other electrode of the ceramic disk. An acoustically massive clamp ring attached to the periphery of the diaphragm defines the area of vibration. The vibrating assembly is mounted within a plastic housing having a chamber configured and dimensioned to improve the electroacoustic performance of the transducer structure. Various pattern directors can be employed with the transducer to achieve shaping of the pattern.

Abstract: A system for reducing higher order nonlinearities in the linearized output of a dimension gauging probe in which the dimension gauging probe provides an output varying inversely with the physical dimension gauged which is in turn linearized to a signal varying proportionally with the physical dimension. Higher order nonlinearities, an error condition, which deviate the correspondence between the gauged dimension and the output from a linear or straight-line function, are reduced by feedback of the linearized output to the probe and, preferably, by feedforward of a portion of the probe output signal to the linearized signal.

Abstract: A pair of parallel clamping arms hold an adjustable loop, which when applied to the limb, provides a device for puckering the flesh for injections. The parallel clamping arms extend from a pair of bent arms which have a spring attached thereto at the lower portion thereof. The spring serves to push the clamping arms inwardly and to maintain the clamping arms in a normally pressed together condition. The adjustable loop is formed of two cooperating interlocking strips which overlap one another. The loop is adjustable by varying the degree of overlap of the two strips.