Abstract: A mixture of tetraalkylsilanes is prepared by reacting a mixture of at least two organometallic compounds with a silicon tetrahalide or an alkyl silicon trihalide. The mixture of silanes is useful as a hydraulic fluid.

Abstract: This invention is directed to the preparation of certain arylene bis-silanols in highly purified form and to the preparation of five new arylene bis-silanols in particular, along with a procedure for polymerizing these and other arylene-type bis-silanols using phosgene as a polymerization promotor or catalyst, to obtain highly purified, high molecular weight arylene-siloxanylene polymers having the characteristic structure: ##STR1## where Y is an arylene or substituted arylene moiety; R and R' are the same or different alkyl group(s), substituted alkyl group(s) or a phenyl group, x ranges from about 1 to 3 and n ranges from about 300 to 1500; said polymers having molecular weights (number average) of 100,000 and higher.Preferred polymers are those arylenesiloxanylenecarbonate polymers which, when laminated to polycarbonate sheets or glass maintain their transparency, stability and adherence to said substrates at temperatures of up to and including 400.degree. F.

Abstract: An apparatus and method is provided for making endless multiple rib power transmission belts each comprising one or more pulley engaging sections by separating these belts from belt bodies having a greater number of pulley engaging sections. The apparatus comprises support means, a belt holding and rotating assembly mounted on the support means and a cutting assembly mounted on the support means.

Abstract: A synchronous belt is provided which has a plurality of angled ridges in the backing layer thereof. These ridges are oriented in a direction opposite the direction of the spirally wound tensile cord and the magnitude of the ridge angle is at least equal to the magnitude of the cord spiral angle. Also provided is a process for making this belt.

Abstract: An apparatus for and method of dispensing a powderlike material by gravity with substantial uniformity and a minimum contamination of the immediate environment is provided wherein the apparatus comprises a substantially horizontally disposed tubular body having opening means through a bottom portion thereof and conveying means moveable within the body for moving the powder-like material over the opening means enabling gravity flow therethrough and wherein the conveying means comprises a flexible conveying device which is moveable through the tubular body and a plurality of flights fastened in spaced relation on the device for engaging and moving the powder-like material along the tubular body and over the opening means.

Abstract: A raw-edge, endless power transmission belt is provided which comprises a plurality of layers. At least one of these layers is a fabric layer; another layer is composed primarily of elastomeric material; and at least one further layer is an elastomeric material having a heat-conducting amount of a pyrolytic graphite dispersed therethrough. The pyrolytic graphite-containing elastomeric layer is disposed between any two other layers in the belt and acts to conduct heat to the outside of the belt. Also provided is a method for making this belt.

Abstract: A curved mandrel, method of making same, and method of curing an uncured polymeric hose employing such curved mandrel are provided and the curved mandrel comprises a plurality of members disposed in end-to-end relation to define the configuration of the mandrel including a predetermined curvature therein, interlocking portions for interlocking the members in only one position to define the configuration and curvature, and a readily attachable and detachable device for holding the members axially against each other after interlocking wherein the members with the interlocking portions and holding device are adapted to provide a substantially straight mandrel for installation of an uncured straight hose therearound, define the configuration and curvature in the mandrel and uncured hose, and provide looseness and axial spacing between members to enable easy withdrawal of the cured curved hose from around the members.

Abstract: A synchronous belt drive system, particularly for small drive pulleys, and method of making such pulleys. The pulley has an optimum pitch radius for its belt teeth addendum circle which has a size between the limits of a maximum pitch radius determined by the radius of a circle through the points of a regular polygon having N equal sides and a minimum pitch radius determined by the radius of a circle having N arcs each equal in arcuate length to the length of each side of said polygon.

Abstract: A method and apparatus for continuously forming a reinforced, flexible duct or hose. The apparatus comprises an extruder for forming an elongated, flat strip of a polymeric material, a strip shaping means for shaping the flat strip to define a profiled strip, means for helically winding the profiled strip with adjoining turns having portions in overlapping relation, means for disposing a reinforcing wire in sandwiched relation between the overlapped strip portions, and means for bonding the overlapping portions.The method comprises the steps of extruding a continuous flat strip of a polymeric material, forming the flat strip to define a profiled strip, helically winding the profiled strip with overlapping adjoining turns, disposing a reinforcing wire in sanwiched relation between the overlapping portions, and bonding together the overlapping portions.

Abstract: An apparatus for and method of severing a continuous flexible reinforced elastomeric conduit supported on a plurality of elongated rigid mandrels disposed in connected end-to-end relation is provided with the apparatus and method enabling cutting through the conduit at each end of each mandrel so that each mandrel has a length of conduit therearound which is approximately equal to the length of the mandrel.

Abstract: A convoluted hose construction comprised of an elongated helically wound elastomeric strip is provided and has first and second connecting means defining opposite side edge portions of the strip for holding the strip in its helically wound relation; and, the connecting means assures that the hose construction is held together in a high strength manner with maximum flexibility while using a minimum amount of material.

Abstract: A cup-shaped wear resistant liner for a center plate structure of a railway vehicle is provided wherein such liner is defined by a planar disc-like bottom portion adjoined by a peripheral flange portion extending from the periphery of the bottom portion with each of the portions being made primarily of a polymeric material wherein one of the portions has a particular wear characteristic and the other of the portions has a wear characteristic that is different from the wear characteristic of the one portion.

Abstract: A polymeric hose and method of making same are provided wherein such hose comprises an inner base tube, a reinforcing braid made of aramid yarn disposed concentrically around the base tube with the aramid yarn having great affinity for water, a cover tube disposed concentrically around the reinforcing braid, and a moisture-impervious tubular film disposed between the braid and cover tube with the film isolating the aramid yarn and resulting in a tubular zone between the braid and cover tube free of water moisture created bubbles.

Abstract: A vacuum hose assembly, method of making same, and vacuum cleaner using same are provided wherein the hose assembly has a chamber in at least one of a pair of hose connectors thereof wherein such chamber is readily opened and closed and a protective device is disposed within the chamber and electrically connected to the electrical circuit of the vacuum hose assembly and the device is sensitive to practically every type of fault capable of causing injury to humans and operates to interrupt the electrical circuit therethrough upon detection of a fault.

Abstract: A stapling apparatus and method together with thermoplastic staples used therewith are disclosed and each staple is made entirely of thermoplastic material and has a bight and a pair of legs the outer portions of which are permanently heat shaped in clinched relation followed by immediate cooling.

Abstract: A tool for cutting a textile cot from an associated mandrel is provided wherein such tool is particularly adapted to be attached to one of a cooperating pair of machine components which are relatively movable toward and away from each other and a mandrel with a cot to be cut supported on the other component whereupon the cot is cut axially along its length upon relatively moving the components toward each other.

Abstract: A clamp for reinforced flexible hose made of a continuous member which is attached to the reinforcement at one or both ends of the hose. Application of force to the clamp expands the hose end to permit insertion or removal of an adjacent member, such as a coupling or fitting.

Abstract: A loop picker and method of making same are provided wherein such picker has a body provided with a picker stick receiving passage extending therethrough and a forward block, and the block and body are comprised of a single strip of laminated fabric consisting of a forward portion and a trailing portion with the trailing portion being disposed in wound relation and having an innermost turn which defines the major portion of the inside surface of the passage.

Abstract: A mailbox and method of making same are provided wherein such mailbox comprises a plurality of enclosing walls, shear pins fastening the enclosing walls together, and a readily opened and closed access door with each of the shear pins having a strength which is substantially less than the strength of the enclosing walls and door so that upon subjecting the mailbox to high impact loads the shear pins shear resulting in disassembly of the mailbox while keeping the enclosing walls and door substantially intact.

Abstract: A tensioning apparatus for an endless power transmission device is provided and utilizes the elastic properties of an elastomeric material to provide the tensioning action and such apparatus is supported adjacent the endless power transmission device to be tensioned and has components thereof operatively associated with the elastomeric material and with the device.