On a substrate is formed a crystalline electrooptic thin-film waveguide, on which are deposited interdigital electrodes extending in the y-direction and spaced apart from one to another in the z-direction. To the electrodes is applied a modulating signal voltage to form in the waveguide an electrostatic field which is spatially periodic in the z-direction having an intensity proportional to the modulating signal voltage and uniform in the y-direction. Coherent light is coupled into and out of th...

Elements for thin-layer chromatography are produced by suspending a finely divided sorbent in a liquid, adding a finely divided synthetic resin as a medium (with or without adding further liquid to the suspension), intimately stirring the mixture and producing a formable paste, forming the paste into the elements, preferably by applying this paste to a base and drying the same.

A stencil assembly integrally mounted on a business form wherein the assembly has a relatively flexible frame secured to the form with a pressure-asensitive adhesive.

A coherent, adherent, thin coating for metal surfaces is disclosed. The coating comprises a polymeric composition of a high vinyl content, liquid, hydroxy-terminated butadiene prepolymer, chain extended and cured by polyisocyanates and polyamines. The coating is sprayed onto an aluminum surface and after evaporation of solvent and curing for a short period at elevated temperature exhibits an adhesion to aluminum of between 0.2 lb/in to 2 lb/in, an elongation of 75% to 150%, and a tensile strengt...

Metal containers, particularly for beer, have been made from stainless steel which is compatible with beer or aluminium which is specially coated to make a compatible inner surface. The stainless steel container is expensive when the wall thickness is such as to withstand rough handling and the cheaper aluminium container has a limited life depending on the internal coating. The present invention provides a double wall container of which the inner wall is of thin stainless steel. The invention s...

The present invention relates to a number of layers of resistive materials superimposed upon an area of the substrate, the material of highest resistivity being deposited first, and therefore at the bottom of the stack, and the remaining layers being deposited in decreasing order of resistivity. Thereafter the layers are selectively trimmed to give required values.

A thin-film microcircuit on a metal substrate with an oxide film on which resistors, capacitors and their interconnections are formed, the metal substrate serving as an electrode for the capacitors, and simultaneously, as the ground as well as a heat sink.

Apparatus for handling thin walled containers including a handling unit comprising a plurality of individual container holders each adapted to hold a container in upright manner therein, means maintaining the holders in spaced relationship and defining an endless path, means for moving the holders in said endless path, each of said holders being split vertically to define two parts which are relatively displaceable vertically from a holder closed position to a holder open position in which a con...

A magnetically actuated switch capable of operating in a variety of modes utilizes a plated wire magnetic film switching element.

An expendable thin walled cup for liquids and the like is disclosed having a configuration which facilitates improved removal from the forming mold, insures more uniform wall thickness and prevents telescoping of the spacing means of a plurality of the cups when stacked in nested relation.