Abstract: An expansion joint for bridges and similar structures comprising an elastomeric sealing element, anchoring means gripping the sealing element and resin mortar connecting the anchoring means to the structure. The resin mortar is comprised of a mixture of ureide and epoxy resins and aggregate. The anchoring means has rods embedded in the resin mortar to distribute stresses therein.

Abstract: An economical retro-reflective roadway marker of high strength plastic materials having a reflective top assembly having a resilient portion that is curved to raise the reflective top assembly and a recessed base assembly or roadway depression. The reflective top assembly comprises a series of steps having reflective tape or other reflective material on the step risers. The steps interconnect spaced apart, parallel curved sidewalls that raise the steps above a road surface. The curved sidewalls serve to guide snowplow blades, or the like, over the steps as the resilient portion of the top surface is flexed downwardly. An end base plate forms a continuation of the steps. When it is only necessary to provide reflection for one-way traffic, the end base plate is secured to the road surface and a depression is made in the road surface to receive the top assembly.

Abstract: A belt tensioning device for an endless drive belt for a vehicle accessories drive system. A sheet metal bracket is adapted to be mounted on an engine in a stationary position adjacent the drive belt and has a lever plate pivotally mounted thereon. An idler pulley is rotatably mounted on the lever plate and is movable into belt tensioning engagement by coil springs mounted on the bracket and engaged with the lever plate. A pair of pockets is formed in the bracket, each of which has an inclined surface which extends upwardly toward the lever plate. A camming block formed of a friction material is movably mounted in each pocket. Each block has an angled surface which is slidably engaged with the inclined surface of the pocket and has a planar coupling surface which frictionally engages the lever plate. The friction blocks provide a damping force on the lever plate when the lever plate attempts to move in the non-belt tensioning direction.

Abstract: A speed bump for use on roadways which imparts a controlled jar to vehicles as they pass thereover. A retarding force is imparted to a downwardly depressible member responsive to the speed of the vehicle.

Abstract: An expansion joint seal for closing a gap between spaced-apart structural members has an elongated body including longitudinal side edges, an upper corrugated treadway surface, a lower undersurface, and an internal web structure including a plurality of laterally spaced vertically disposed webs each having an upper pair of cross-bars extending upwardly and outwardly therefrom and connected to the upper treadway and a lower pair of cross-bars extending downwardly and outwardly therefrom. An additional lower cross-bar extends from each side edge downwardly and inwardly to a pair of curved surfaces, and a vertically disposed web extends between the juncture of the curved surfaces and the centermost cross-bars. An upper cross-bar extends upwardly and inwardly from each side edge to the upper treadway surface.

Abstract: Each road surface element (1) has a cut-out portion (3), which is delimited by means of section (4b) of a plate (4). The cut-out portion (3) is traversed by a bolt (6). A locking piece (2), which has two catches (26) on its lower side is inserted into the chamber formed by the cut-out portions of two adjacent elements and is then rotated so that the catches (26) come to rest beneath the bolts (6). The two elements are then locked together and forces are transmitted through the two locking portions and the catches (26) to the bolt (6) and thus from one element to the other. The upper surface of the locking piece (2) is level with the surface of the two elements.Application more particularly to the production of temporary road surfaces, for example, during road detours or for use in construction excavations.

Abstract: A brake mechanism particularly suited for snowmobile applications wherein an engine drives a primary clutch which is in belted communication with a secondary clutch mounted to secondary clutch shaft, the secondary clutch shaft has a brake disc fixably mounted thereon and has a radial extension into a brake carrier. The brake carrier is slidable on a chain housing having a pair of brake plates including brake pads suspended between opposing carrier walls. By causing one brake pad to contact one side of the brake disc, the carrier housing is moved to bring the other brake pad into contact with the other side of the brake disc.

Abstract: A resilient, deformable, adhesive-free sealing strip for expansion joints in concrete comprises an elongated central core with a reinforcing web embedded therein. First, second and third pairs of fins extend from opposite sides of the central core, the first pair being shorter than the second and third pairs, the first pair disposed at the top of the strip and the second and third pairs being disposed at spaced intervals down the elongated core. Each pair of fins has a combined width greater than the width of the joint to be sealed. Upon insertion of the strip, the second and third pairs of fins are substantially deformed in the direction opposite insertion, exerting pressure against the concrete void walls, and through the central core, against one another, firmly locking the strip in place. The first pair of fins are only moderately so deformed, sealing the open top of the joint.

Abstract: A gear drive has two closely spaced parallel output shafts driven by a single input shaft. One gear train connects the input shaft to one of the output shafts which has a thrust bearing at one end to absorb thrust loads. A second gear train connects the input shaft to the second output shaft. The second output shaft mounts a double helical pinion which is in engagement with two double helical gears on a pair of spaced shafts. The spaced shafts are each mounted in thrust bearings to absorb the thrust on the second output shaft which is transmitted through the meshings double helical gearing to the pair of shafts. A linkage engages the ends of the pair of shafts to equalize the thrust load on each of the two shafts.

Abstract: A bridge pier is constructed from a number of serially gradated cribs nestable one within the other for transportation and manually mountable one upon the other in order of decreasing size on arrival at a site by the use of rotatable davits attachable to each upper-most crib in turn. When used for dry gap bridging the cribs are assembled upon a pair of adjustable length telescopic legs each pivotally connected to a load-spreading grillage and adjustable for use on slopes of up to 1 in 20. Both initial levelling and subsequent adjustment for ground settlement can be achieved by adjustment of the telescopic legs. When required for use in deep water bridging the cribs may be mounted directly upon a pontoon.

Abstract: An improved, portable, lightweight vibrator which is an integral unit and is easily and quickly removably secured to a screed board to vibrate it. Only a source of electrical power is required to operate it. Virtually any 2.times.4, 2.times.6 or larger boards of wood or metal such as aluminum or magnesium up to 20 feet in length can be used as the screed board. When properly installed on the screed board, the vibrator will walk or pull the screed board toward the rough pour, to save time and labor in leveling concrete.

Abstract: A power transfer device including a gear box which is rotatably driven from a suitable power source and provided with an output shaft for transmitting power to a desired location at a predetermined speed in relation to the input rotational speed of the gear box and a stationary shaft projecting from the gear box in which the stationary shaft and output shaft have bevel gears on the inner ends thereof in meshing engagement with bevel gears journaled on independent parallel shafts extending transversely of the gear box with each of the bevel gears on the parallel shafts including a spur gear connected therewith and in meshing engagement with an idler gear or idler gears on an idler shaft with the spur gears having a predetermined ratio for determining the output shaft speed. The specific arrangement of components is such that rotational movement of the gear box is necessary to produce output shaft movement whereas the output shaft cannot be rotated when the gear box is not being driven.

Abstract: This invention relates to a device for spanning expansion gaps in bridge decks or roadways. The invention provides a small, simple and low cost edge channel member of U-shape which may be welded to one type or a variety of different commericially available steel sections in accordance with any particular needs. Screws accessible from above are provided to retain the edge portions of an elongate body of flexible resilient elastomeric material which spans the expansion gap. Thus, the invention permits the installation of expansion joints for any desired thickness of the wearing course and any type of fastening to the concrete base course.

Abstract: Reflectors for indicating, for example, the dividing line between traffic lanes and road edges include an above-the-road housing portion that has a spherical contour rising gradually from the road in all directions. Impact, resistant solid metal shoulders have between them a light channel with divergent side walls and an upwardly and outwardly sloping upper surface. Bridges across the channel, from shoulder to shoulder protect reflective lenses from tires and lift narrow two wheel vehicle tires up and over the lenses. A removable assembly retains the lenses latched in place. Wash openings directly above the lenses expose the lenses to direct impact by rain and reservoirs collect water for splash washing. Bases for the reflectors can be surface mounted, imbedded for new road construction, or anchored by bolts in a shallow recess. Extension below the road surface level of the assembly retaining the lenses permits larger reflector lenses in the housing of the reflectors imbedded and bolted in a shallow recess.

Abstract: A bearing assembly for structures composed of two main elements each of which forms a portion of either the supported structure or the supporting structure or foundation. One of these main elements is formed in a "U" type shape and provided with flutings on the interior sides facing each other. The other main element is formed to fit into the interior of the other "U" type main element and is provided with flutings on opposing sides of said element. As one main element is inserted into the other, the flutings of both elements can be aligned to face each other, and complementary cores inserted. Two or more of such cores inserted at opposing sides of the inserted element, would position the inserted main element securely into the other main element, the cores filling the flutings of the "U" type main element and thus providing a secure positioning to the supported structure.

Abstract: A floatable bridge element for briding obstacles, especially bodies of water. Automatically latching coupling elements are provided along one longitudinal side and along both end faces in such a way that the bridge element can be widened with a further, identically or correspondingly embodied bridge element into a bridge, or with further bridge elements can be extended into a "single-track" or "dual-track" floating bridge. The bridge element includes a flat hollow compartment panel filled with foam and simultaneously serving as a roadway, and below which extends a buoyancy body likewise filled with foam and rigidly connected therewith. The buoyancy body, for reducing the impact pressure in flowing waters, is inclined or angled-off along the lower edge of that longitudinal side of the bridge element not provided with coupling elements.

Abstract: A torsionally elastic power transmitting device is described having respective rotatable hub and rim members coupled in torsional driving relation through resilient cushions. The improvement is directed to the radial bearing surface which is formed directly between the hub and rim members along their respective outer and inner peripheries.

Abstract: A road post or reflector formed of two identical disk shaped members each having a bottom wall, two longitudinal side walls and an end wall at at least one end. One side wall and half of the end wall having a projection and the other wall and other half of the endwall having a groove enabling the two members to be assembled by snap engagement.

Abstract: A motorized traffic-way controller wherein a retractile curb barrier and locking lift means operate by motor drive means that is recycled by closing a mode switch through cam controlled "stop" and "go" switches responsive to the position of a motor drive means at the side of the traffic-way, the preferred installation being above grade and comprised of low profile modules with retractile curb configurations that project as tire barriers, the modules and drive means being adapted to coupled engagement one with the other when assembled.

Abstract: A first elongated steel frame has a dowel mounted thereon at right angles. The dowel projects through an aperture in a compressible filler board thence through a registering opening in a second elongated steel frame. The long dimensions of the two frames are parallel and each frame abuts an opposite surface of the filler board. A cap-like shield covers the free end of the dowel with end clearance to accommodate longitudinal thermal expansion and contraction. The two steel frames are free to move toward and away from each other but are constrained to move in unison in a direction perpendicular to the dowel. By bonding each frame to a respective concrete slab of a pair of adjoining slabs with the filler board co-planar with the joint, the slabs partake of the same freedom of motion in one direction and the same restraint in the other two directions.