Abstract: Radiations of two different frequencies are transmitted through a fluid comprising a mixture of materials, wherein a radiation is absorbed in the range of the radiation absorption by one of the materials, and another radiation is not absorbed, and wherein the radiations operate with pulses of identical pulse repetition frequency and identical pulse intervals. The detected electrical signal from the monitored radiations passed through the fluid, the center frequency of which corresponds to the reciprocal value of the pulse interval, is filtered out with the aid of a filter. The concentration of the absorbing material in the fluid is measured from the amplitude changes of the filtered-out signal. By the use of filters, the bandpass ranges of which are respectively adapted to the occurring pulse repetition frequencies, and based on the interpretation of the measuring signal as a modulated signal, a high safety against noise signals is attained.

Abstract: Apparatus for the venting and isolation of an oil well test tool drill string comprises reference pressure gas release apparatus having two spaced pistons (7, 11) located at opposite ends of the reference gas chamber (10) and blocking both a gas vent (17) to annulus and a hydraulic liquid passageway (22) extending further up the test string, the pistons being held together by a shear pin (13) until the application of a predetermined higher pressure across those pistons causes the pin to shear, allowing sequential movement of the two pistons toward each other, firstly opening the gas vent to annulus, and secondly opening the passageway (22) to a chamber (24) of hydraulic liquid. The hydraulic liquid pressure within this passageway then causes actuation of ball valve apparatus for isolating the upper section of tubing, which in turn enables transfer of hydraulic pressure to apparatus for venting the contents of the tubing to annulus.

Abstract: The boat has a flap (1) forming a part of its V- or spoon-shaped bow and being unfoldable therefrom. This flap is supported by means of projections (9a,9b) arranged on both of its sides on swivel joints (13a,13b) set back into the inside of the boat with respect to the inner wall of the bow. Upon pivoting the flap (1) out of the bow opening (15), the flap is swung away from the bow wall portion with the uncovering of an interspace (2) between the flap and the bow wall portion which latter lies underneath the bow opening (15). The flap outside wall can be urged underneath the surface of the water and can be fixed in its position. The flap (1) is designed as a buoyant member, and when serving as a working or recreational platform, etc., can be folded back into the bow of the boat in such a way that the hydro- and aerodynamic properties as well as the esthetic appearance of the bow are not impaired.

Abstract: The fastening device (5) for the releasable fastening of a strut (3a-3d) to a column (1) comprises a retainer ring (7), attachable to the column (1), and a connecting element (9a-9d) for connecting the strut (3a-3d) to the retainer ring (7). The connecting element (9a-9d) has at one of its ends diametrically opposed jaws (33a, 33b) which extend around the lateral surfaces (16a) of the retainer ring (7) whereby the strut (3a-3d) is fastened to the column (1) safe from twisting even with respect to large torques and bending moments. The exact horizontal position of the strut or struts (3a-3d) can be adjusted by rotating the retainer ring (7).

Abstract: A child drowning protection guard for an open head, plastic industrial container to prevent a toddling child from toppling head first into the container containing a liquid. The guard is provided by a tapered tube integral with the bottom wall of the container and extending upwardly from the bottom wall, through the surface of the liquid, a distance at least one-half the height of the container, and having an effective diameter at the top so that the radial space between the tube and the inner side wall of the container is dimensioned to be less than the diameter of the head of a typical toddling child. The tube is hollow so that a plurality of empty containers can be stacked in nested relationship, and the side wall of the tube can be corrugated or fluted to conserve on the amount of volume taken from the container by the placement of the tube therein.

Abstract: In a receiver (3 ) for a DSSS signal (DSSS=direct sequence spread spectrum), an inverse filter (12) is utilized in place of a matched filter for detecting the symbols (B.sub.m). The inverse filter (12) is distinguished in that it responds to the predetermined pulse sequence as such with a pure Kronecker delta sequence. Preferably, the DSSS signal is generated with a pulse sequence realizing a maximum process gain.

Abstract: A child resistant closure for a medicine bottle wherein an outer cap is freely rotatable on an inner cap. A latch assembly including a slidable latch member and a latch post are positioned between the top walls of the inner and outer caps. An aperture is provided in the top wall of the cap for observing the position of the post preparatory to sliding the latch member into engagement with the latch post for interconnecting the inner and outer caps for removal of the closure from the bottle. The inner cap is provided with a cam surface engageable with the slidable latch member for automatically moving the latch member out of engagement with the post during the securing of the closure to the bottle, and a tamper evident tab is removably connected to the outer cap to prevent the unauthorized manipulation of the latch member.

Abstract: A re-winder box for an electronic game box wherein a pair of electrical cables are each connected between the game box and a respective player manipulative controller. The re-winder box is dimensioned to support the electronic game box on the top thereof, and is provided with a pair of wind-up spools for the controller connected cables, and a pair of recesses in the front wall thereof for storing the controllers when not in use. The re-winder box provides a neat and uncluttered appearance to the game box and surrounding area when the game box is not in use.

Abstract: In a multiple access method for the simultaneous exchange of several data streams ({B.sub.1,m }, {B.sub.2,m }, {B.sub.3,m }) among several participants of a transmission system, various data streams ({B.sub.1,m }, {B.sub.2,m }, {B.sub.3,m }) with the same spread sequence (s[.]) are expanded to a corresponding DSSS signal ({B.sub.1,m s[.]}, {B.sub.2,m s[.]}, {B.sub.3,m s[.]}. During transmission, the various DSSS signals ({B.sub.1,m s[.]}, {B.sub.2,m s[.]}, {B.sub.3,m s[.]}) are heterodyned to a single incoming signal. For detecting the various data streams in a receiver, the incoming signal is filtered in a filter that is inverse with respect to the joint spread sequence (s[.]). In order to permit reliable detection, heterodyning takes place in each case so that the spread sequence intervals pertaining to different data streams are chronologically shifted with respect to one another by a given minimum value (delta.sub.-- T).

Abstract: A laser output radiation with reduced energy noise components is produced which is also usable for the formation of short, stable laser pulses in the pico- and sub-picosecond ranges. The low noise components are obtained by superposition of the resonator wave in the active medium with its fed back output radiation lying on the order of magnitude of the spontaneous radiation emission of the oscillating resonator wave.

Abstract: The process for measuring the concentration of materials, wherein a radiation is absorbed in the range of the radiation absorption of the material, and another radiation is not absorbed, operates with pulses of identical pulse repetition frequency and identical pulse intervals. The detected electrical signal, the center frequency of which corresponds to the reciprocal value of the pulse interval, is filtered out with the aid of a filter. The concentration of the absorbing material is determined from the amplitude changes of the filtered-out signal. By the use of filters, the passband ranges of which are respectively adapted to the occuring pulse repetition frequencies, and based on the interpretation of the measuring signal as a modulated signal, a high safety against noise signals is attained.

Abstract: A multi-purpose, full service pipeline construction and testing machine wherein an internal combustion engine is mounted on a trailer adapted to be towed to a job site, the trailer having driven rollers for supporting pipe to be cut; a circular saw, a bevelling cutter and an abrasive wheel are rotatably mounted thereon for fabricating pipe to be assembled in a pipeline system. A water pump, hydrostatic pump and air compressor are also mounted on the trailer for testing the assembled pipeline for leaks. The internal combustion engine is operatively connected to the drive roller, circular saw, bevelling cutter, abrasive wheel, pumps and air compressor.

Abstract: A child's urinal for hanging on the outside of a toilet, wherein a basin having an integral back wall forming a splash wall is suspended from the side of a toilet, the back wall is dimensioned to positioned the basin in proximity to the floor adjacent the toilet to render the urinal accessible to a child. The basin and integral back wall can be detachable connected to a frame member suspended from the side of the toilet, and the frame member can include an adjustable feature for varying the position of the basin relative to the floor.

Abstract: A liquid soap dispenser and a mounting base for connection to a counter top on a sink in a public washroom to prevent the unauthorized removal of the dispenser. The dispenser includes a bottle having a spherical bottom wall which prevents the bottle from being self-supporting if removed from the mounting base.

Abstract: A self-storing maintenance stand for a scissor lift aerial work platform wherein a pair of arms are freely pivoted on each side of a stack of pivotally connected scissor arms at the medial portion thereof. An arcuate saddle plate is provided on each end of the pair of arms for engaging protruding end portions of the pivot pins of the next adjacent scissor arms. A weight is connected to the end portion of one of the arms so that the arms will freely pivot to a non-working or stored position.

Abstract: A decorative outdoor light fixture has an upwardly facing light source mounted in a pipe coupling substantially at or somewhat above ground level. The light source extends into a vertically extending nipple having a pipe union threadably mounted on the top thereof for securing a selected light filter and lens assembly to the upper end of the nipple. Each light filter and lens assembly emits a particular colored decorative light effect to the surrounding atmosphere, and each includes a top hemispherical lens.

Abstract: An electric steam humidifier having a water reservoir configured substantially as a right triangle, wherein the hypotenuse side of the reservoir can be selectively mounted on the exterior surface of the bottom wall and exterior surface of the vertical wall of an air duct of a forced air furnace.

Abstract: A plastic tank fitting having a circular flange portion molded integrally with the exterior surface of the plastic tank side wall adjacent to the tank bottom wall, and concentric with a drain opening in the tank side wall. Approximately 240.degree. of the upper portion of the flange is flush with the tank side wall, while approximately 120.degree. of the lower portion of the flange extends downwardly from the tank side wall adjacent the tank bottom wall. A flange and associated pipe fitting are bolted to the molded circular flange portion.