An apparatus for testing a weld seam between two overlapping sheets of polyethylene comprises a nozzle in air flow communication with an air pressure gauge and an air valve. A clamping device securely holds the nozzle within the air passage located between two parallel weld seams of the overlapped polyethylene sheets and maintains a closed air system. The closed air system is pressurized to a desired air pressure level and maintained at this level for a desired length of time. A drop in air pres...

A liquid crystal material which exhibits an antiferroelectric phase while the liquid crystal material is in a bulk state, is sealed between substrates. The liquid crystal layer sealed between the substrates exhibits a mixed phase wherein the liquid crystal layer contains liquid crystal molecules aligned in a plurality of alignment states which differ from each other in the alignment order of the liquid crystal molecules forming adjoining smectic layers. The direction of the director of the liqui...

The present disclosure is directed to a machine for making green sand molds by an impact mechanism which imparts an impact from an impact head driven by the explosive force of suddenly released compressed air in such a way that the molding head strikes the sand and imparts its kinetic energy by way of an impulse to the sand, thereby packing the sand around the patterns. It has been discovered that by using the impulse principle in molding, the sand is uniformly packed and uniform mold hardness r...

A CCD memory device having on a single chip a parallel multi-channel storage section into which data is fed by a serial input register and from which data is read by a serial output register. Although at least two storage electrodes are needed throughout the memory to store each bit of information, the total number of such electrodes required in the input and output registers is greatly reduced by alternately storing the input and output bits at even and odd numbered storage electrodes of the in...

A machine is process monitored and controlled for continuous bending of long products to a predetermined radius by using three parallel contact-free distance meters (laser transmitters) and by measuring the distances to the bent surface on the product, by calculating the actual bending radius based on the fixed distances between the meters and the measured distances, and controlling the adjustment of the machine in response to the relation between the calculated actual radius and the desired rad...

An object of the invention is to realize a gain monitoring method for an optical amplifier and an apparatus thereof, capable of detecting a gain for a signal light regardless of a noise light generated inside the optical amplifier. To this end, in the gain monitoring method according to the present invention, a part of a signal light input to an optical amplifier is branched as an input monitor light, and the input monitor light is modulated, and also a part of a light output from the optical am...

A sand mold forming machine has a cope frame aligned above a drag frame with a pattern arranged between, and within, the frames. A sand filling is positioned in each of the frames. The sand fillings are compacted by squeeze plates overlaying the open, upper and lower ends of the cope and drag respectively. The squeeze plates are moved towards each other to compress the sand within the frames and against the pattern. Each of the squeeze plates is made of numerous, separate sections that are mount...

Described are systems and methods for determining the gross weight of an aircraft. A flight regime is determined based on one or more inputs. A neural net is selected based on a flight regime. The neural net inputs may include derived values. A first estimate of the gross weight is produced by the selected neural net. The first estimate is used, along with other inputs, with a Kalman filter to produce a final gross weight estimate. The Kalman filter blends or fuses together its inputs to produce...

A housing has, on an outer circumferential surface thereof, a circumferential surface area, a toothed surface area complementary in shape to grooves and teeth of a boot of rubber, and a stopper engagable by tip ends of the boot of rubber and a boot of synthetic resin. The circumferential surface area, the toothed surface area, and the stopper are successively arranged in the order named in the direction in which the boots are installed onto a rotary joint. The housing has an outside diameter at ...

The invention relates to a process for the manufacture of an orthopedic sort in shoes, in the case of which the top-part is provided along its borders with a continuous cut-out section, so that for the final form-imparting processes of the orthopedic support, merely a border-part and a bottom-part have to be subjected to the grinding operations. This ensures that, also after longer usage, the orthopedic support shows a stability of form, since a material thickness of only a small order of magnit...