A memory element which is an improved version of the known FAMOS (floating avalanche-injection metal-oxide-silicon) memory elements in that memory erasure is effected electrically. The structure of the known FAMOS memory elements is modified by having at least one diffused region in the silicon substrate which is isolated from the elements gate and drain electrodes, which is of opposite conductivity type to the substrate, and which is situated adjacent to the channel region between the gate and ...

Projection of an image from a transparent photographic element onto a screen without deterioration or destruction of the transparent photographic element, by projecting a beam of light through a transparent photographic element bearing reflective image areas.

Heater assembly that may be used for heating a surface such as the glass rear windscreen (or window) of a motor vehicle comprises a heater element having a continuous metal strip of sinuous form. The element is sandwiched between two paper backing sheets which are adhesively secured to opposed surfaces of the metal strip. A first backing sheet is for removal prior to the mounting of the element on an automobile rear windscreen, and the other backing sheet is to be removed after the element has b...

Frictional braking elements comprising: 1. a pyrolytic graphite microcomposite comprising pyrolytic graphite crystallites containing embedded therein codeposited crystals of refractory carbide selected from the group consisting of silicon, zirconium, hafnium, titanium, tantalum, and niobium, and mixtures thereof. SiC, ZrC, and HfC are preferred. Particularly preferred are microcomposites comprising pyrolytic graphite crystallites containing embedded therein codeposited aciculae of crystalline si...

Article incorporating at least one tensile reinforcing element such as a metal ribbon twisted in helical fashion but having at least one edge thereof intermittently deformed out of its helical configuration.

A polyolefin filter for tobacco products and the like was prepared. The extruded element is an open-cell foamed polyethylene or polypropylene having a TPM filtration efficiency greater than 20 percent. The filter rod can be made by extruding polyethylene containing less than 0.2 moles of a volatile blowing agent per 100 grams of resin at a melt temperature between 130.degree.C. and 150.degree.C., the temperature of the die being between 120.degree.C. and 136.degree.C. Higher melt temperature and...

A refractory element, for example a floater or skim bar, for use in a glass melting furnace comprises a body of refractory material sheathed in a refractory metal skin with means on the top of the element for retaining a static pool of molten glass to minimize metal vaporization from the exposed surface of the skin.

An apparatus for the accurate placing of building elements such as bricks or blocks which has an assembly rotatably mounted on a support which is itself mounted for movement parallel and normal to a guideway. The assembly includes means for dispensing and placing jointing or packing material such as mortar prior to the placing of a building element and gripper means for transferring the building elements from a supply area to a predetermined placement point. The apparatus also includes means for...

A support structure for a pleated filter element is moulded of nylon and has parallel spaced bars joined at one face by the bases of frusto-conical fingers moulded integrally therewith. During manufacture of the element, the rows of fingers are engaged in the pleats of pleated filter medium from a pleating machine and the assembly is then curved into cylindrical shape.

An optical element and a method of forming such an optical element are disclosed. The optical element comprises a base of optically transparent material, a layer or several layers of material having selected physical and optical properties, and a coating integrally formed to the substrate and having substantially the same optical properties as the substrate so that the said layer or layers is or are effectively embedded therein. The layer or layers may be discontinuous e.g. formed as stripes, or...