Abstract: The invention concerns a process for seismic exploration. It consists in simultaneously emitting disturbances from a plurality of sources S1 . . . Sn immersed at various depths and positions chosen so as to maximize the power transmitted vertically and to minimize the power transmitted in certain determined oblique directions. The reflected or refracted seismic signals are gathered by hydrophones. By this means certain parasitic refractions are eliminated.

Abstract: Apparatus for obtaining seismic data or information in the field comprises electrical communication paths established between seismic detectors distributed over the ground, and a digital seismic data recorder. Each of the paths comprises a pre-amplifier, various filters, a regulable-gain amplifier, and finally a digitizer, or the paths have these elements at least partly in common. The digitizer operates by carrying out random weighing; it comprises a pseudo-random generator and at least part of the contents of this generator is loaded in parallel into a register. The pseudo-random number thus obtained is converted into an analogue signal and is used for weighing a sample of the seismic signal in a comparator. This gives a single bit each time, which is then recorded in the recorder.

Abstract: A reducing agent such as ammonia, urea or hydrazine effecting selective reduction reaction with an exhaust gas from a gas turbine is injected into a duct of the turbine along with water, and at the same time compressed air from a compressor for the turbine is jetted in the duct to atomize the reducing agent. An amount of the water is controlled so that the surrounding temperature will be suitable for reduction of nitrogen oxides of the exhaust gas. The atomized reducing agent flowing in the duct is decelerated by silencers disposed in the duct, especially by a particular arrangement thereof, so that the reducing agent will be in good contact with the exhaust gas to sufficiently reduce the nitrogen oxides. Catalyst layers are used according to kinds of the reducing agent. The catalyst layers are disposed in the silencers or at the positions that the silencers are disposed.

Abstract: The 23 day physical biorhythmic cycle, 28 day sensitive biorhythmic cycle, and 33 day intellectual biorhythmic cycle are commonly plotted in phase relationship with each other from a point where they commonly start on the neutral axis representing birth through 100 years in 4 year groupings, with adjacent 4 year groupings being shifted 1 day corresponding to the presence of a leap year in each 4 year grouping. The chart containing the plots is provided with lines indicating day intervals and indicia representing year intervals consecutively from the beginning day of birth. A curve that is a composite of the three biorhythmic curves is vertically aligned and spaced adjacently throughout the chart.

Abstract: An elongate bar of electrically conductive material and having a generally U-shaped cross-section carries on the inner side of one of its legs a support with a resistance layer facing towards the other leg. A slider is guided between the two legs of the bar and has a contact spring, one contact tongue of the spring bearing on the resistance layer and another contact tongue bearing on the opposite, second leg of the bar forming a collector element. A nose formed on the slider engages a groove which exists between the resistance element and the bent free end of the one leg of the elongate bar, to guide the slider. A cover plate overlies the opening of the U-shaped cross-section of the elongate bar. An operating knob is disposed outside the cover plate and extends through a slot in the cover plate operatively to engage the slider.

Abstract: A propeller hub rotatable about an axis is provided with a plurality of airfoil surfaces peripherally arranged about the axis and defining a first pitch angle that is acute and adjustable with respect to the tangent on the circular arc described by rotation of the airfoil surface as seen in a plane perpendicular to the axis, and further by a second pitch angle being acute and ajustable and measured with respect to the axis of rotation within a plane containing the axis of rotation. Peripherally adjacent airfoil surfaces may have their first pitch angles oppositely oriented and second pitch angles oppositely oriented to respectively propel fluid inwardly and outwardly with respect to the axis of rotation. The air foil surfaces may be directly connected to the hub and extend conically outward or connected to the hub by means of arms that may be angled airfoil surfaces functioning as conventional screw propellers. The hub may be mounted coaxially adjacent a counter rotating screw.

Abstract: A fluid pressure actuated drive for providing for the closing unit of an injection moulding machine a to and fro traversing motion of a movable part of the unit with little force and a clamping of the closed unit with a greater force. The device has at least two double acting piston and cylinder devices which act in parallel and the pistons of which each have at each side a piston rod which passes through a seal in the responsive adjacent cylinder end. The piston rod on one side of at least one piston is thicker than that on its other side and the piston rod on one side, which corresponds to the same working side as one side of the one piston, of the or each other piston is thinner than that on its other side. Traverse in one direction is provided by applying fluid pressure to both sides of the one piston, and in the other direction by providing fluid pressure to both sides of the other piston. Clamping pressure is provided by applying fluid pressure to one side only of each of the pistons.

Abstract: A twin screw extruder comprising a cylinder having twin bores therein to receive the twin screw of the extruder and a circular casing with at least one passage to permit heating or cooling fluid to flow between the cylinder and the casing, in which the cylinder has a generally circular outside contour with a first set of grooves and a second set of grooves forming parts of said at least one passage, extending obliquely to the longitudinal axis of the cylinder and formed in the outer surface of the cylinder, the bottom walls of the grooves extending parallel to a plane which includes the two longitudinal axes of the twin bores with the first set of grooves lying on one side of said plane, and the second set of grooves lying on the other side of said plane, the inclination of said first set of grooves to said axis being opposite to the inclination of said second set of grooves to said axis, and the inside of the casing containing spaced recesses forming further parts of said at least one passage and, except for

Abstract: The infra-red heated spray paint booth has positioned in the roof thereof an infra-red heater which extends the length of the booth. The heater includes a black radiant pipe to which is supplied high temperature combustion gases at one end thereof while the other end has a vacuum pump to draw the combustion gases through the pipe. The pipe is comprised of three spaced sections, each of which is mounted adjacent the reflective surfaces of a reflector unit mounted on the roof of the booth. The reflector units cooperate with glass infra-red energy transmitting members to provide enclosed zones, with the black radiant pipe section positioned between each glass member and a reflector unit. The black radiant pipe emits infra-red rays which are focused in part by the reflector and pass through the glass infra-red energy transmitting member to impinge upon a freshly painted workpiece, for example, an automobile, in the paint booth below.

Abstract: A drive for submerged portions of floating bodies, i.e. watercraft comprising a pulsating nozzle including a control device for pulsating the nozzle by expansion and contraction of an open inner nozzle diameter portion. The control device contracts and expands the nozzle such that during expansion the front of the nozzle is expanded to a greater extent than the rear of the nozzle to produce a positive angle of attack, and during contraction the rear of the nozzle remains expanded to a greater extent than the front of the nozzle to produce a negative angle of attack.

Abstract: An improved heat and cold insulating flexible composite element comprises at least one radiation chamber with walls of flexible material having reflecting surfaces. Opposite walls of said chamber are resiliently spaced from each other by suitable spacing elements. Preferably the chambers are enclosed by an envelope which may also be formed of flexible reflecting sheets.

Abstract: The new cultivar Sunspot is especially characterized by its broadleaf evergreen foliage which has pronounced yellow centers with dark green margins of irregular depth, with the leaves inside the plant being of the same variegated color as the stem tips, thereby giving the plant as a whole a distinctive and striking yellow spotted appearance.

Abstract: A spider capitulum type of chrysanthemum plant which is a sport of the cultivar Splash, disclosed in our pending U.S. application Ser. No. 778,667, filed Mar. 17, 1977, and now U.S. Plant Pat. No. 4,218, Splatter being distinguished from the parent cultivar by its medium yellow ray floret color.

Abstract: An African violet known by the cultivar name Louisiana having light pink, single, non-dropping flowers with frilled edges, the flowers being carried on upright and relatively short stems. The flowers appear just above the rosette of dark green leaves. The cultivar also has a compact habit and excellent growth characteristics.

Abstract: An African violet known by the varietal name Kansas and a mutation of Delaware, characterized by strong upright flower stems each of which carries 4-5 flowers. The flowers are large, star-shaped, non-dropping and pure white in color, with a slight red hue in center. Kansas flowers continuously, is fast growing, and have a compact growth habit.

Abstract: An African violet known by the cultivar name Maine and characterized by large, single star-shaped flowers white in color, with violet-blue centers; strong, upright flower stems each carrying 4-5 flowers, and small, relatively light green foliage having serrated edges, with the flowers appearing just above the foliage crown.

Abstract: An African violet named Montana which is a mutation of Gigi, disclosed in U.S. Plant Pat. No. 3,146. Montana has white flowers with blue tinging in the centers. The flowers are carried on strong, upright flower stems, and the plant is fast growing and has a compact growing habit. Initial flowering is 7-8 weeks after potting. Montana has green leaves with smooth edges, the leaves having a hairy and velvety texture.

Abstract: An African violet named Kentucky having strong and upright stems each carrying up to 10 flowers which are non-dropping blue-violet in color, durable and of typical violet shape. The new cultivar has dark green leaves, and sturdy growth habit.

Abstract: An African violet named Wisconsin, which is a mutation of Cornelia. Wisconsin is characterized by its intensive blue-violet flower color and uniform flowering, with the flowers being long lasting and non-dropping. The plant is vigorous and fast growing, producing up to 11 or more flower stems, each carrying four to six flowers, thereby providing a full bouquet when the plant is in full bloom.

Abstract: Electroplating of the unprotected cut edges of sheet metal panels coated with an electrically non-conductive protective coating as said edges are formed on cutting the panels to shape, is effected in a highly economical manner by forming a pile of said panels so that the cut edge portions of said panels are substantially aligned with the edge portion of the electrically non-conductive protective coating, bringing at least one side face of said pile with the cut edges in contact with the electroplating electrolyte, connecting each single panel to an electroplating current source, and electroplating the cut edges of each panel. Sheet metal panels without coating or with an electrically conductive coating are electroplated in the described manner by interposing electrically non-conductive layers between the sheet metal panels at least at their margins to prevent penetration of the electrolyte between the panels and conductive contact of the panels with each other.