Abstract: A reflective road sign made of a transparent tempered glass consisted of a cylindrical base, and a dome connected above the cylindrical base, the cylindrical base having a peripheral outside wall coated with an inner layer of light-permeable color covering, an outer layer of corrosion resisting coating, and an intermediate layer of reflective metal coating between the inner layer of light permeable color covering and the outer layer of corrosion resisting coating.

Abstract: A reflector road sign includes a reflector body received within a casing, the reflector body being made of a tempered glass and having the lower half part covered with a reflector paper, the casing having a corrugated inside surface covered with a layer of bonding resin for binding the reflector body and a plurality of recesses spaced around the outside wall thereof for binding to the mounting hole on the road by a bonding resin.

Abstract: An improved bicycle wheel reflector having two equal sized wings, of rigid plane construction coated with reflective material of different colors, so that the color of the surface of one wing is the same as the opposite surface of the other wing, the wings extending from their apex at a fixed 10 to 20 degree angle from horizontal, and being of rectangular shape, and being of sufficient length to extend beyond the radius of the bicycle tire, yet short enough so as to not interfere with the free travel of the wheel, and being provided an alternating pair of slots at the apex of the wings so as to engage the spokes of any bicycle wheel, so that the lights of on-coming traffic are reflected in a flashing pattern for better visibility of the bicycle in darkness.

Abstract: A light transmissive, including reflective and refractive visual warning device for attachment from the handle grips of a bicycle or motorcycle, to indicate the presence of the user to car drivers, is carried upon a short flexible suspension means, such as a pigtail or a ball chain or rotatable connector, permitting unrestricted motion and displacement, by which in the case of the ball chain or other rotatable connector permits spinning and other displacements due to motion. The device, preferably in the form of a double-faced triangle or multi-faced planar or curved fin shape may have one reflective face of reflective microspheres or retro-reflective micro-prisms and the other a holographic metallized mirror having an arrangement of multi-faceted reflective patterns possessing light refractive characteristics. One embodiment comprises a bicycle handgrip incorporating a wind-driven spinner rotatably mounted in the rear end of the grip, and having at least one light reflective, rotatable surface.

Abstract: An improved hollow retroreflector assembly with a hard mount assembly is provided, comprising a hollow retroreflector assembly adhered onto a mounting member. The hollow retroreflector has three plates having optically flat reflective surfaces disposed at right angles to each other and non-reflective surfaces opposite to the reflective surfaces of the plates. Each of the plates has first and second sides disposed at right angles to each other, the first side of each plate abutting and being adhered to the reflective surface of the plate adjacent to it. The mounting member has first and second receiving surfaces disposed at right angles to each other. The first receiving surface has adhered to it a portion of the first side of one of the plates, and the second receiving surface has adhered thereto a portion of the second side of the same plate. The mounting member also has a base member having a threaded bore extending therein for receipt of a correspondingly threaded member extending from a support.

Abstract: A retroreflective sheet comprising a monolayer of retroreflective elements partially embedded in and partially protruding from the front surface of a binder layer and a backing bonded to the back surface of the binder layer wherein the backing is elastic and comprises a highly conformable and deformable nonwoven web comprising melt-blown microfibers having multiple layers of a relatively low modulus material and a high modulus material.

Abstract: Flexible layered reflecting and luminous material is provided which combines the advantages of a light reflective component and a luminescent component. The material includes a first layer of prismatic light reflective plastic material having an underlying surface formed with a plurality of minute prism-like formations projecting therefrom at regular spaced intervals and an overlying substantially smooth light transmissive surface. The material also includes a second layer of plastic luminescent material attached to the underlying surface of the prism-like formations. The layers are joined at a first region as by heat sealing, ultrasonic welding, sewing, or stapling into a unitary structure such that the prism-like formations are substantially destroyed. A second region is thereby defined at which the first layer and the second layer are physically distinct.

Abstract: A cover for a propeller is disclosed which is intended to be used while a boat on which the propeller is mounted is being transported on a trailer. The cover is either made of a reflective material or is covered with a reflective material and is intended to reflect light from headlights of vehicles following the trailer to provide an added safety factor when a boat is being towed by a vehicle.

Abstract: Flexible visibility enhancing material combines the advantages of a light reflective component and a luminescent component. The material includes a first layer of prismatic light reflective plastic material having an underlying surface formed with a plurality of minute prism-like formations projecting therefrom at regular spaced intervals and an overlying substantially smooth light transmissive surface. A second layer of plastic luminescent material is contiguously and integrally attached to the underlying surface of prism-like formations and generally coextensive therewith. The visibility enhancing material simultaneously radiates luminescent light from the second layer through the underlying surface of prism-like formations and through the smooth light transmissive surface and reflected light from the prism-like formations through the smooth light transmissive surface.

Abstract: Methods and apparatuses are disclosed for setting the nodal point of a retroreflector such as a corner-cube prism. The apparatuses permit rotation of the retroreflector about a stationary first pivot axis and motion of the retroreflector along its optical axis relative to the first pivot axis, wherein the first pivot axis is perpendicular to the optical axis. Methods comprise using the retroreflector to produce a reflected image of a stationary reference object, and pivoting the retroreflector about the first pivot axis and moving the retroreflector along the optical axis to a position at which the reflected image remains stationary as the retroreflector is pivoted. Thus, the retroreflector is adjusted so as to produce a reflected beam that is exactly parallel to a corresponding incident beam even when the optical axis of the prism is not exactly parallel with the propagation vector of the incident beam.

Abstract: The marker has a pair of upwardly converging reflectant planar panels facing approximately in opposite directions. In its correct attitude on a support surface the panels slope at 2.degree.-6.degree. to the vertical if the marker is intended for assisting the landing of fixed wing aircraft and at 8.degree.-10.degree. to the vertical if the marker is intended for assisting the landing of helicopters. The reflectant panels are preferably retroreflectant.

Abstract: A retro-reflective target tape comprising a lower sub-laminate having an upper transparent thick mylar backing about 2 mils thick, a release sheet therebeneath and a pressure sensitive adhesive therebetween; and an upper sub-laminate having an upper light reflective sheet with a thin, transparent mylar backing about a half mil thick therebeneath and with a pressure sensitive adhesive therebetween and with pressure sensitive adhesive beneath the thin mylar backing, the upper sub-laminate being cut to form a plurality of circular reflective targets and removed from the lower sub-laminate except for the plurality of circular reflective targets, the pressure sensitive adhesive above the release sheet remaining with the thick mylar backing upon the removal of the adjacent release sheet. Also disclosed is a method of fabricating such tape.

Abstract: A reflector has 3 planar reflecting surfaces with the upper and lower surfaces each intersecting the central plane at an angle between 145.degree. and 150.degree., each reflecting surface being composed of individually imperceptible cube corner reflectors.

Abstract: An omnidirectional optical reflector structure (41, 52, 61) is made by forming a plurality of holes in a solid body (11) so as to result in a face-centered cubic lattice. Conventiently, the desired structure can be made by three successive steps of microfabrication, e.g., in the presence of a mask layer (12). Preferred reflector structures can be used, e.g., as external mirrors as filters, and as cavity materials of communications lasers with improved signal-to-noise ratio.

Abstract: A reflectant surface of retro reflective material comprises a plurality of parallel convex outward ribs having a center-to-center spacing of between 3/8" and 1/16". The retro reflective surface preferably employs an arrangement of triads mutually perpendicular surfaces, which triads and surfaces are indistinguishable at normal minimum viewing distances.

Abstract: Flexible, self-supporting, air-permeable retroreflective sheeting comprising a two-sided, self-supporting, air-permeable web of thermoplastic filaments with retroreflective elements partially embedded in the filaments on one side of the web. On the other side of the web, the surfaces of the filaments are substantially free of retroreflective elements. In some embodiments, the web may be used as a bonding agent to secure the sheeting to a desired substrate.

Abstract: A truncated pyramidal pylon, has retroreflectant side walls each sloping at 8.degree.-10.degree. to the vertical for helicopters and 3.degree.-6.degree. to the vertical for fixed wing aircraft. The pylon may be constructed as a permanently erected unit or as a collapsible arrangement from hingedly connected flat surfaces, with a surface corresponding to each side, foldable to provide the assembled pylon.

Abstract: An apparatus in association with a bicycle tire and the like which may be retractably secured to the tire, whereupon an elongate strip formed with spaced cut-outs permit securement of the elongate strip to an exterior side wall of the tire, wherein the strip is formed of a multi-layered, multi-colored strip organization to effect reflection of the tire in use within an associated bicycle. Triangular reflective segments may be adhesively and retractably mounted into the cut-outs in securement of the organization to the associated tire.

Abstract: The signalling baton consists of a cylindrical tube made of unbreakable transparent material and sealingly closed at its ends by a handle and a plug. this tube contains a plurality of reflectors arranged in the form of a prism and retained between the handle and the plug.

Abstract: An optical tape for use decoratively includes a back portion of a first color, a serrated front portion made of a clear plastic. The serrations include alternating wide and narrow grooves such that a side of a wide groove adjoins a side of a narrow groove at an angle of substantially 90.degree.. The sides of each narrow groove have a second color. When the tape is viewed from a distant point, only the first color of the back portion is seen, but when viewed from up-close, substantially only the second color of the narrow grooves is seen.

Abstract: A target for use in photogrammetry and automated theodolite systems comprising a rigid body having a support surface, a retro-reflective member comprised of a tape-forming substrate having normally a rearward surface and a forward surface an adhesive provided on the rear surface thereof for securing same to the support surface of the target; there being light reflective discrete particles secured adhesively on the forward face of the retro-reflective member; and a mask-forming member having a rearward surface and a forwrd surface, the mask forming member being of greater area than that of the retro-reflective tape and the light reflective means provided thereon. The mask is secured in overlying in relationship upon the light reflective particles and provided with an opening with predetermined area less than that of the light reflective particles so that a predetermined portion of the latter is exposed therethrough.

Abstract: An improved skateboard having roller trucks attached to the underside of the skateboard deck. The trucks are insulated from the skateboard deck by riser pads of sufficient thickness to receive and house self-contained battery operated lamps. The lamps are positioned to direct light beams from beneath the deck in fore and aft directions. Switch means in the lamps are operable to turn the lamps on and off.

Abstract: An optical system is provided for traffic signal devices. The optical system includes an illuminating source for emitting light; a prismatic reflector for receiving and reflecting the emitted light; and a lens for receiving and for redirecting the reflected emitted light. The illuminating source and the reflector are aligned along a first axis that is vertically inclined relative to a central horizontal axis of the traffic signal device in a range between approximately 2 degrees and 4 degrees. The reflector has a substantially parabolic contour and has a plurality of substantially vertical critical angle prisms formed on an outside surface of the reflector. The prism have included angles of greater than 90 degrees but less than or equal to 95 degrees, or included angles of greater than or equal to 85 degrees but less than 90 degrees.

Abstract: This is a device for locating the ski tips of a snowmobile by reflecting the beam of light from the headlight of the snowmobile back to the operator by a reflection material applied to the ski locator device and adjusting the locator to provide maximum reflection back to the operator.