Abstract: The present invention relates to a device for use on airplanes to permit visual identification and location by pilots of other aircraft in the vicinity so as to avoid mid-air collision. The device refracts and reflects light so as to make the plane visually observable by pilots, any other aircraft in the area. The device is formed as a tape and attached to various parts of an aircraft. Refracting elements redirect light towards reflecting elements for intensifying and directing it therefrom, creating a readily recognizable shimmering image.

Abstract: The invention relates to a bearing screw including a cylindrical shank and a screw threaded end portion in which at least part of the shank has a diameter which is less than the over-all diameter of the threaded end portion and this part of the shank is provided with a sleeve of synthetic resin. The part of the shank which carries the sleeve preferably has a diameter which is substantially equal to the root diameter of the threaded end portion while the maximum diameter of the sleeve is preferably substantially equal to the over-all diameter of the threaded end portion. The invention also relates to a spectacle frame hinge in which a bearing screw having a sleeve of synthetic resin arranged on its shank is used as a hinge pin. In such arrangement the threaded end portion of the screw is screwed into a threaded hole formed in an outer ear of the interfitting ears of the hinge knuckles while the shank of the screw with the sleeve thereon passes through plain holes in the other ears.

Abstract: A lug connecting device for a metal rim of a spectacle frame comprising a first lug formed on the rim and having a horizontal slit, a pin fixed to the first lug, a second lug on the rim and adjacent the first lug, a tie plate having an attaching portion inserted in the horizontal slit and a plate spring portion extending alongside the lugs, a bore formed in the second lug and having the pin fitted therein, and a stop provided on the second lug and engaged in an aperture formed in the plate spring portion, the plate spring portion being elastically deformable with torsion of the rim.

Abstract: A scanner using spatial modulation of the light profile incident upon an acousto-optic modulator in which the deflector clear aperture window is decentered from the optical axis of the system so that the light profile falls just within one edge of the deflector clear aperture window. One advantage of the decentering of the optical alignment is increased system frequency response due to transmission of only one sideband of the light profile, which in terms of a printing systems means increased resolution. Loss of laser light due to decentering of the optical alignment can be minimized by using a single sideband signal as the modulator drive signal instead of the conventional double sideband drive signal. Distortion of the light profile due to decentering of the optical alignment can be reduced by predistorting the single sideband drive signal supplied to the acousto-optic modulator.

Abstract: An anti-glare device for the display tube of a computer terminal or other video display tube wherein illuminated messages or images are presented on a highly reflective surface, comprising a microweave screen of fine black filaments in a fine mesh mounted in a flexible frame so that the screen conforms to and maintains contact with, the display tube. The frame is secured so that the screen covers the terminal tube, and substantially conforms to the surface thereof. The filaments are preferably approximately 0.0025 inch in diameter and there are approximately 150 filaments per inch.

Abstract: A transmission type illumination equipment for microscopes comprising a condenser lens for high magnification level and an aperture stop arranged in the vicinity of the front focal point of said condenser lens for high magnification level which are so arranged as to be replaceable with a condenser lens for low magnification level and an aperture stop arranged in the vicinity of said condenser lens for low magnification level respectively. Said illumination equipment for microscopes is so adapted as to form an image of the light source at the position of a corresponding aperture stop when it is switched for illumination between high and low magnification levels, thereby assuring illumination in favorable conditions from ultra-low to high magnification levels.

Abstract: A device for preventing the eyes from being dazzled by the lights of an oncoming vehicle comprises a spectacle-type frame which carries anti-dazzle lenses having parallel, non-transparent, light-intercepting layers which are inclined forwardly and downwardly. The angular position of the lenses can be adjusted about a horizontal axis to provide the required anti-dazzle effect.

Abstract: A recording optical system comprising a semi-conductor laser of substantially single mode as the light source, an objective lens of which the focal point is located substantially at the beam divergent position of said semi-conductor laser in a plane perpendicular to the junction plane thereof, an afocal cylindrical lens composed of an element having a refractive power only in a plane parallel to said junction plane, an imaging lens, an aperture limiting the beam entering said imaging lens, and a photosensitive medium positioned in the vicinity of the focal point of said imaging lens.

Abstract: A warning reflector construction is provided comprising a transparent plate having a rear surface opposite a light-entrance surface. The rear surface comprises toric surfaces arranged side-by-side and supporting an outermost reflective layer. The optical axes of the toric surfaces can be arranged at an angle to the perpendicular to the light-entrance surface. The warning reflector can be produced by injection moulding or stamping.

Abstract: To promote comfort and customized fitting of spectacles on individual wearers, an adjustable nosepiece formed of a thermoplastic is assembled with a nosepiece suspension frame by the optometrist after customizing the suspension frame for securement to either metal or plastic frame spectacles. The nosepiece can be heated by the optometrist for final shaping to individual nose contours and the nosepiece mounting lugs are pinched to secure the nosepiece in a selected adjusted position.

Abstract: Rectilinear drive apparatus for rapidly and accurately moving a driven component to a desired location with settling of vibration to be achieved immediately after reaching said location; including a frame, a stepping motor drive coupled to the driven component and bearing members slidably mounting the component to the frame. One of the bearing members includes a pair of rails with elongated bearing tracks, one rail mounted to the component and the other to the frame and with the tracks aligned along the direction of component movement. An elongated metal bar, preferably of brass or oil impregnated bronze is slidably mounted in the bearing tracks to slidably support the driven component. A ball nut assembly having a pair of high durometer rubber pads drivingly connects the stepping motor shaft to the driven component.An X-Y rectilinear drive apparatus includes an upper X and a lower Y drive stage.

Abstract: A laser beam scanner having a positive cylinder mirror located between the polygon scanner and the photosensitive surface. The positive cylinder mirror, which has power in the sagittal (cross-scan) plane but no power in the tangential (scan) plane, minimizes scan-to-scan spot position errors due to angular alignment errors between adjacent facets of the polygon scanner without introducing significant sagittal field curvature. Residual sagittal field curvature is compensated for by providing a negative refractive cylinder lens, with power in the sagittal plane, between the cylindrical mirror and the polygon scanner.

Abstract: The device is designed for attaching on the rear parts of automotive vehicles and serves, especially during the night, for visual informing of drivers about the presence, the distance, the width and the length of a preceding vehicle. The device consists of light-reflecting elements, for instance, reflex foil, or of light-emitting elements, for instance, lamps. The said elements 1 arranged in two rows, one above the other, with the same spacing between the said elements, form a single module 4, and a pair of such modules arranged one above the other form a double warning-information module 5. The number of modules in a single strip /FIG. 1/ and in a double strip /FIG. 2/ depends on the width of the vehicle.

Abstract: This invention discloses a bow and hinge mounting assembly for pivotally securing a bow to an eyeglasses frame having a upper frame portion and a lower frame portion. In one embodiment of this invention, a single mounting screw is used to secure the upper portion of the eyeglasses frame to the lower portion of the frame and to pivotally mount the bow to the eyeglasses frame. The lower portion of the eyeglasses frame has a lower mounting plate that protrudes outward therefrom. A mounting pin rigidly secured to the lower mounting plate is arranged to pivotally engage a hole in the mounting portion of the bow. The bow is kept in place on the mounting pin by means of a upper retaining plate. This plate protrudes outward from the upper portion of the eyeglasses frame and is arranged to contact the top of the mounting pin to thereby retain the bow in place upon the mounting pin.

Abstract: Synchronizing signals for a laser beam scanner are generated by applying first and second angularly spaced light beams 100,200 to the same reflecting surface 11 of a rotary, multi-surfaced mirror 10. When the first reflected light beam 110' is close to the start point 111 of the line 130, the second reflected light beam 210 is focused onto a photo-detector 30 whose output constitutes the synchronizing signal for the scan. Since both input beams 100, 200 are incident on the same mirror surface rather than impinging an edge thereof, jitter due to angle division errors, rotational speed fluctuations, and mechanical vibrations is eliminated.

Abstract: A pad of homogeneous material has a closed, substantially smooth surface. It is age-resistant, wear-resistant and gentle on the skin. It can be permanently connected to the material used for spectacle frames, made of translucent material and made with a lustrous surface. It has a Shore D hardness of 10 to 30 measured in accordance with DIN 53 505.

Abstract: A head-supported optic shield protects the eyes of the wearer and eliminates the need to wear glasses while working. The optic shield comprises a porous, ventilated cap having an annular supporting member or brim and an adjustable chin strap. The supporting member or brim includes an outwardly extending peripheral flange which cooperated with and supports the supporting flange portion of a cylindrical shield. The cylindrical shield is of clear, transparent safety glass or optical quality plastic with three lens portions, viz. clear, close magnification, and distance magnification. The supporting flange on the optical shield has a notch which cooperates with a positioning abutment on the brim so that the cylindrical shield may be rotated and temporarily fixed in a predetermined position with any one of the lenses in front of the eyes of the wearer. An auxiliary welding shield is provided.

Abstract: In a retro-reflective assembly comprising a base member in whose surface is contained a contiguous layer of exposed retro-reflective elements and a plurality of support elements upstanding from said base member, this invention contemplates forming such support elements from viscous adhesive material and applying the adhesive material in a precise pattern to the base member by utilization of screen printing techniques. The encapsulating transparent film may then be applied to the sub-assembly by adhesive engagement with the top surfaces of the adhesive supports, eliminating the need for the application of substantial heat and pressure heretofore required.

Abstract: The present disclosure is directed to a controlled reflection readout for information displays or targets such as digital or instrumentation panels for such apparatus as computers, compasses, watches, clocks and consoles wherein the display is not placed normal to the viewing plane and cannot be read at 90.degree. to the display. The display or specular transparent window is inclined to the line of sight and glare shielding means which extends forwardly from the top of the display or target to prohibit reading the display at a right angle thereto whereby reflections from the sun or lights in a room will interfere with reading through the optically transparent window in front of the target or display.

Abstract: An optical scanner capable of scanning parallel to two intersecting axes. The scanner comprises a single electromechanical transducer and a compliant link interconnecting the transducer with an optical element to which the two-axis movement is to be imparted. The link is selectively compliant to two planes containing the two axes and it is oriented to receive from the transducer force components in both planes. The transducer is driven at the frequencies of the resonances associated with the link compliances and the masses involved therewith. The link thereby imparts amplified motion to the optical element simultaneously in both planes, the resulting path described by the element thus being a Lisssajous pattern.