A separator for a maintenance-free cell consisting of several layers and being sufficiently porous to serve as the electrolyte holder. At least one of the layers is micro-porous, resistant to migration of heavy metal ions, and proof against short circuits.

Described are setting and hardening accelerators for hydraulic binders and said binder comprising compositions that are free of sulfates, alkali metals and chlorides. The setting and hardening accelerators comprise, as main component, water-soluble fluoride comprising aluminum salts and optionally complexing agents and/or amines. In comparison with alkaline accelerators, said accelerators result in an essential shortening of the setting time and a fast development of compressive strengths. In co...

To provide a free standing bag of plastic material so that it will be useful as a grocery bag, a bag is formed folded with a triangular bottom insert to form a flat bottom having a central crease, the crease lines being pre-formed in the bag so that it can be erected and will have side walls completely free of creases; the side walls of the bags themselves are preferably embossed, striated, or quilted of double strength material, with embossing or quilted lines extending, preferably, in two vect...

An electro-mechanical free pistol wherein the barreled action, including the firing mechanism, does not greatly exceed the outside diameter of the barrel except for the bolt handle and sights, said barreled action serves as a platform upon which the grip and trigger switch are adjustably positioned and electrically connected.

A diaphragm-controlled carburetor having a fuel inlet valve and a diaphragm chamber particularly for location on small engines where the carburetor is subject to high vibration and close confinement so that there is a possibility of heat build-up and the provision of a vapor pump in the carburetor for removal of vapor from a high point in the metering diaphragm chamber where vapor can collect to prevent vapor lock and other malfunctioning of the carburetor.

The invention relates to a free cable winch. Each pair of jaws 11, 14 is guided by two pairs of rollers 18 which run in guideways 1a, 2a formed in the cheeks of the winch case to ensure rectilinear traction of the cable C, with substantially no flexing of the cable between the two pairs of jaws. The invention can be applied to powerful winches with consequent low wear of the cable.

A free wheel unit including a drive unit with an outer surface forming an inner race and having an annular groove in the axial center thereof in which is disposed an expandable split bearing ring, a driven unit or outer race provided with a plurality of circumferentially arranged ramped recesses in each of which is disposed a roller, the rollers being biased radially outward into engagement with the ramped recesses by the expandable split bearing ring, the split bearing ring providing friction c...

Free wheel drive comprises two concentric cylindrical races and wedging cams maintained in contact with said races by a cylindrical cage and resilient means. The wedging cams have two cylindrical surfaces, one in contact with each of said races. The axes of said cylindrical contact surfaces and the common axis of the two races are generatrices of a cylindrical locus, the diametral plane of which is defined by the common axis of said races and the axis of the cylindrical surface of one of the cam...

An antenna which is constructed exclusively of fiberglass, with the sole exception of the electrical conductors, couplings, and upper and lower ends, which may incorporate fiberglass or some other material, which antenna is constructed in a series of lengths, or in a single length in the case of a very short antenna, each of the lengths being essentially of hollow tubular construction, with the walls of the tube made up of alternate layers of glass fiber filaments, one such layer being made up o...

Milk-free margarines, unlike margarines having milk solids in the aqueous phase, have little tendency to discolor when used for frying but have the undesirable attribute of a reduced salt sensation, and the reduction is counteracted by the presence of very small amounts of sodium caseinate.