An interferometer for measuring the degree of deformation of an object, wherein alignment detection is facilitated by producing a moire pattern. An image signal data for reference fringes is compounded with interference fringe data that has been used for alignment detection. In generating a moire pattern, the interference fringe image signal data is process using the reference fringe data as a filter, resulting in improvement in visibility of the moire pattern.

Articles are described which utilize a unique photochemical property of a certain class of heterocyclic compounds. These heterocyclic compounds are the mono- and bicyclic aziridines. Oriented crystals of these heterocyclic compounds are photochromic in an unusual way. The effect of the excitation radiation and the strength of the resulting absorption band responsible for the appearance of color depend on the polarization of the radiation. These articles contain at least one optically smooth surf...

Heat exchanger comprising a tower in which hot gases of combustion and a cold exchange fluid sprayed at the top of the tower flow in counter-current manner and a tank for recovering the fluid in the lower part of the tower connected to means for conducting the fluid to a circuit of utilization. Perforated baffles are placed in the upper part of the tower and an inclined solid non-perforated baffle is placed in the lower part of the tower above the inlet of the combustion gases and has a lower fa...

Homohedral construction is a building and truss system based on the regular icosahedron. It is analogous to the standard building or truss system based on the cube, which is characterized by 90.degree. corners and edges on its struts and planar surfaces.

The present application relates to insecticidal materials containing 2,2 dichlorovinyl dimethyl phosphate and paradichlorobenzene.

An insecticidal material comprising a porous ceramic carrier impregnated with a liquid mixture of 2,2-dichlorovinyl dimethyl phosphate and hexachloroethane, naphthalene, camphor and quinone.

Certain thioureas of the class of 1-aryl-3-(2-hydroxyethyl)thioureas are shown to exhibit significant tranquillizing and antidepressant activity.

The average radiance obtainable from an illuminator comprising a plurality of separate spaced light sources, such as laser diodes, which individually radiate light that is at least partially coherent, is increased by means of a recorded hologram which, when illuminated by the spaced light sources, derives a single resultant output light beam.

This invention relates to a tap employing deformation of matter, wherein it comprises a body which bears three rotating cylinders mounted idly and provided with annular threads each distant by the value of the pitch of the threading to be made. These three cylinders are regularly distributed and are inclined axially by an angle equal to the helix angle of the thread to be made.

A shutter, adapted for use in a system for the radiation curing of a line of articles, includes a number of adjacent baffle units, the blades of which are configured and spaced to substantially prevent the passage of radiation, while permitting the flow of air through the shutter. To minimize the tendency of thermal expansion to distort the shutter, the units are expandably mounted along the length of the supporting frame, and the blades extend transversely thereof.