Abstract: A pre-fabricated warped pavement slab and a forming system for making the slabs. The forming system includes a plurality of forming sections which can be adjusted so as to form a warped-plane pavement slab. Also disclosed are methods for making the pavement slab and forming system. Also disclosed is a method for installing the warped pavement slab.

Abstract: A pre-fabricated pavement slab having a binder distribution system and an interconnection system formed for attachment of the bottom surface of the slab, wherein both the binder distribution system and the interconnection system are accessible from the top surface of the slab, such that the binder material may be injected into the binder distribution and interconnection systems from the top surface of the slab.

Abstract: A closed-cell polymer foam having a density of less than 100 kg.m−3 is described. The cells in the foam contain a foam blowing agent comprising (a) a blend of two or more hydrofluorocarbons, (b) a blend comprising a carbon dioxide and one or more hydrofluorocarbons or (c) a blend comprising dimethyl ether and one or more hydrofluorocarbons, and the polymer is a blend comprising at least 50% by weight of an olefinic polymer(s) and up to 50% by weight of a polar polymer(s) having a lower molecular weight than the olefinic polymer which when in the heat plasticised state is able to dissolve the foam blowing agent. A process for preparing the foam is also described.

Abstract: A pre-fabricated pavement slab having a binder distribution system and an interconnection system formed for attachment of the bottom surface of the slab, wherein both the binder distribution system and the interconnection system are accessible from the top surface of the slab, such that the binder material may be injected into the binder distribution and interconnection systems from the top surface of the slab.

Abstract: A self-propelled concrete finishing trowel has a power steering control system that steers the machine by tilting the driven shaft(s) of the rotor assembly or assemblies of the machine without requiring the imposition of fatiguing actuating forces by the machine's operator. The steering control system includes at least one electric actuator, such as a ball screw actuator, coupled to each rotor assembly of the machine and controlled by an operator-manipulated controller. The controller preferably includes at least one, and possibly two, joysticks that can be manipulated by the operator to steer the machine in the direction of joystick motion and preferably at a speed that is proportional to the magnitude of joystick movement. In the typical case in which the machine is steered by pivoting a gearbox of at least one rotor assembly about two axes, a separate actuator is provided for each axis of gearbox pivoting.

Abstract: A pre-fabricated pavement slab having a binder distribution system and an interconnection system formed for attachment of the bottom surface of the slab, wherein both the binder distribution system and the interconnection system are accessible from the top surface of the slab, such that the binder material may be injected into the binder distribution and interconnection systems from the top surface of the slab.

Abstract: A pre-fabricated pavement slab having a binder distribution system and an interconnection system formed for attachment of the bottom surface of the slab, wherein both the binder distribution system and the interconnection system are accessible from the top surface of the slab, such that the binder material may be injected into the binder distribution and interconnection systems from the top surface of the slab.

Abstract: A concrete finishing trowel has one or more driven rotor assemblies coupled to an engine or other power source of the machine by a novel torque transfer system including at least one flexible shaft and possibly including a variable speed ratio torque converter assembly. The flexible shaft, preferably comprising a flexible wound wire shaft, bends to accommodate tilting movement of the associated rotor assembly that occurs upon a steering operation, thereby eliminating the need for high-maintenance universal joints or other, less durable equipment. The torque converter assembly, preferably taking the form of a pair of variable speed clutches each having variable diameter sheaves, permits the speed and torque ratios of the drive system to change with increases in engine speed so that the same machine can be effectively used for both low speed/high torque floating operations and for high speed burning operations.

Abstract: A window regulator mechanism comprises an elongated guide rail member mounted within a vehicle door. A window moving structure engages the window panel and is slidably mounted on the guide rail member to allow the window panel to be moved generally vertically with respect to the vehicle door. An actuating mechanism slidably moves the window moving structure along the guide rail member. An elongated, flexible counterbalancing member applies a counterbalancing force to the window panel that opposes a force of gravity acting on the window panel. The counterbalancing member has a first end attached within the door, a second end attached to the window moving structure, and an intermediate portion extending over a guiding portion disposed above an uppermost position of the window moving structure.

Abstract: A window regulator assembly comprising a window panel, a track, a slider member, a slider moving assembly including a drive assembly and a coupling assembly. The track is constructed and arranged to guide the window panel during movement of the window panel between opened and closed positions. The slider member is constructed and arranged to be movable along the track between a first position wherein the window panel assumes the closed position and a second position wherein the window panel assumes the open position. The slider moving assembly is constructed and arranged to move the slider member between the first and second position. The coupling assembly of the slider moving assembly is constructed and arranged to couple an output movement of the drive assembly to the slider member. The drive assembly includes a drivable input structure and a driven output structure, which structures are rotatable about a common axis.

Abstract: The present invention is a window regulator mechanism for vertically moving a window panel mounted within a motor vehicle door. The mechanism comprises an elongated guide rail member mounted within the vehicle door and having a base portion with a pair of side flange portions. A first of the pair of side flange portions has a nose portion extending laterally outwardly therefrom. A second of the pair of side flange portions has a convex exterior surface. A window moving structure engages the window panel and has a base member and a pair of side leg portions extending from opposing sides thereof. One of the side leg portions has a nose-receiving groove formed in an inwardly facing surface thereof. The window moving structure is slidably mounted on the guide rail member. A manually operable actuating mechanism is constructed to slidably move the window moving structure vertically along the guide rail member.

Abstract: An on-glaze low expansion glass flux composition suitable for coating onto a glazed surface which is essentially free from lead and cadmium and comprises, in mole percent, SiO.sub.2 : 35 to 75%, Bi.sub.2 O.sub.3 : 4 to 12%, Al.sub.2 O.sub.3 : 2 to 12%, B.sub.2 O.sub.3 : 18 to 35%, at least one of Li.sub.2 O, Na.sub.2 O, K.sub.2 O : 0 to 12% (in total), and certain other optional ingredients with the provisos that BaO is not contained in an amount of more than 2 mole percent, the total amount of Bi.sub.2 O.sub.3 +B.sub.2 O.sub.3 +Li.sub.2 O,Na.sub.2 O and K.sub.2 O is in the range of from 25 to 45 mole percent, the total amount of Li.sub.2 O, Na.sub.2 O and K.sub.2 O is in the range of up to 10 percent by weight except when the only alkali metal oxide present is Li.sub.2 O, and the composition has a coefficient of thermal expansion in the range of from 4.0 to 7.0.times.10.sup.-6 /.degree.C.

Abstract: A public key cryptographic system uses Lucas functions as the basis for encoding and decoding messages. An encoding device and a decoding device are linked by a communication channel. The first device is able to be actuated by some message to be transmitted, M, as well as an encryption key, E, so as to form a cryptogram, C, so that C can be sent over the communication channel to a decoding device. The encryption key, E, is a pair of positive whole numbers, e and N, which match the decryption key, D, of the second decoding device. The message M must usually be broken down into blocks, M.sub.i, such that each is greater than or equal to zero and less than or equal to N-1. N is a composite number--i.e. it is made up of at least two prime numbers, p and q, such that N=p.multidot.q. The cryptographic transformation done by the encoding device can be described using the notation of Lucas functions. It is, for each ith block of message M which produces a matching ith block of the cryptogram C:C.sub.i =V.sub.e (M.

Abstract: An improved article and method for making and installing a bridge deck replacement system. Subsystem articles include a plurality of precast slabs which contain features, notably projections and plates which depend from the underside thereof, which are used to form both haunch forms/molds and grout engaging devices. When used in conjunction with the conventional and preestablished supporting structure subsystem, the slabs, though use of the various devices included and/or depending therefrom, non-shrink grouting and the improved method of installation, are securable thereto and, yet, may be severally and/or discretely removed at a later time and replaced with new slabs. The replacement facility is obtained concomitant with the attainment of an overall system having a truly composite action in that slabs and support structure subsystems function as a singular unit.

Abstract: A glass composition which is essentially free from lead and cadium comprises, in mole percent, SiO.sub.2 :35 to 75%, Bi.sub.2 O3:0.1 to 15%, Al.sub.2 O.sub.3 :0.1 to 10%, B.sub.2 O.sub.3 :1 to 30%, at least one of Li.sub.2 O, Na.sub.2 O, K.sub.2 O:5 to 30%, ZrO.sub.2 :0.1 to 10%, and certain other optional ingredients, with the proviso that BaO and ZnO are not contained in an amount of more than 2 mole percent. These glass compositions can be used as fluxes for mixing with pigments to provide compositions for the decoration of ceramic materials and/or glass.

Abstract: A stab joint coupling, for joining corrugated pipes, has a male connector and a female connector both having means for attachment to a first and second piece of pipe by engaging the corrugation of the pipe. A circumferential elastomeric sealing means is positioned between the joined coupling connectors to effect a substantial liquid seal for the joint. The coupling permits two pieces of corrugated pipe to be joined relatively inexpensively and quickly by workers in the field.

Abstract: The subject invention provides a rock catchment barrier comprising a plurality of modules. Each module comprises a concrete base having a top surface, a post, a concrete barrier, an aperture for connecting the post to the top surface of the concrete base, a connector for connecting the concrete barrier to either side of the concrete base, and a fence panel for catching rocks, the fence panel being attachable to the post, wherein when the concrete base is connected to the concrete barrier, and the post is connected to the concrete base and the fence panel for catching rocks, a resulting module is formed. The rock catchment barrier provides protection for use in a rock excavation or scaling site where there is a need to stop rocks which are projected away from the site, such as when the rock excavation or scaling site is adjacent to a flow to traffic.

Abstract: High speed turning of elongate confectionery bars through 90.degree. is executed in two stages. The bars are turned through an acute angle in a first stage by a timed blast of air from an air jet while the bar are in flight between first and second conveyors and through a further acute angle by a pair of diverging differential speed conveyors. The timing of the air blast is achieved by detecting the leading edge of the bar by sensors prior to projection. The orientation of the bar is checked by further sensors after initial transfer to the differential speed conveyors, and the relative speeds of those conveyors is adjusted if necessary to complete the turn.

Abstract: A system for producing asymmetrical barrier wall section assemblies from a combination of standardized precast concrete components of complex cross section and custom dimensioned precast components of simple cross section includes first and second half-sections having symmetrical inclined outer face portions, at least one filler block for supporting the second half-section so that its inclined outer face portion is vertically displaced above the inclined outer face portion of the first half-section, and a filler panel for filling a gap between the top of the first half-section and a top portion of the second half-panel. The at least one filler block and the filler panel are essentially rectangular in cross section, so that they can be cast with any desired height dimensions within a predetermined range in simple open-top box molds having one adjustable side.