A variable orifice extruder head for extruding parisons whose wall thickness may be varied over the length of the parison. The extruder head comprises a die assembly movable with respect to a fixed mandrel for varying the die assembly orifice. The die assembly is supported by suspension rods from a fixed housing through which the mandrel passes and in relation to which the mandrel is also fixed. The suspension rods are threaded at their upper ends and have spur gears threaded thereon. An interna…

A device for determining the genuineness of documents, such as paper bills. The bill is clamped between two planes. One plane has spacing ridges which abut against the paper thickness outside the printed surface pattern, and a plunger abuts against the top of the printed surface pattern at some selected portion thereof to measure the height of the printed surface at that portion above the thickness of the paper.

The chronograph drum is mounted in fixed bearings at top and bottom so as to rotate in a fixed vertical axis. The drum can be driven at high or low speed by a motor.

In a hydraulically supported roll including a rotatable hollow cylinder and a stationary crosshead, transverse end seals are provided to seal a longitudinal chamber formed in the clearance space between the crosshead and the hollow cylinder. Each transverse end seal includes a roller bearing having a first bearing ring rotatable with the hollow cylinder and a second bearing ring mounted on the crosshead. The first bearing ring includes a first surface, which along with a second surface formed on…

An electrolytic composition is disclosed which comprises an electrolyte mixture and a fluorescent additive. The fluorescent additive should be stable at the pH of the electrolyte mixture. In the preferred embodiment the fluorescent additive is a pyrene compound at a concentration of 0.1% by weight of the final composition. An improved electrochemical cell is also disclosed which incorporates the electrolytic composition of the present invention. A method for detecting spillage or leakage of elec…

A sealing device for use in contact with a reciprocating member such as a piston rod of an automotive shock absorber has a plurality of seal lips with tips which make resilient sliding contact with the surface of the reciprocating member. Chambers are formed between the tips of adjacent seal lips. The seal lip closest to an internal fluid to be sealed is designed to facilitate flow of the fluid into the chamber between this seal lip and the adjacent seal lip, across the region of contact between…

A magnetometer device for measuring the magnetic fields caused by field sources includes a Dewar vessel that has an interior with access through a neck. The interior contains several superconducting gradiometers as well as corresponding SQUIDs. The Dewar vessel is arranged underneath or laterally to the field source. An insertion vessel for a liquid refrigerant which is thermally coupled to the SQUIDs and is located in the interior. The gaseous refrigerant taken from the insertion vessel is supp…

A throttle valve sensor having at least two switches for detecting different positions of a throttle valve. The setting of the switching conditions of the switches is such that these switches can not be made OFF simultaneously, over the entire range of the degree of opening of the throttle valve. A detachment of a connector connecting the sensor to a control circuit causes the corresponding port voltage level to be that obtained when all of the switches are made OFF, and as a result, a quick and…

A ferritic alloy steel with high ductility and high toughness, and a controlled microstructure for making pipe molds for centrifugally casting pipe consisting essentially of from about 0.12% to about 0.22% carbon, about 0.40% to about 0.80% manganese, about 0.025% maximum phosphorus, about 0.025% maximum sulphur, about 0.15% to about 0.40% silicon, about 0.00% to about 0.55% nickel, about 0.80% to about 1.20% chromium, about 0.15% to about 0.60% molybdenum, about 0.03% to about 0.08% vanadium, a…

The invention relates to an enzymatic composition and method of extending the shelf life of foodstuffs. The composition contains a glucose oxidase/catalase enzyme preparation. The method can be used both in normal and modified atmosphere packages.