Abstract: Apparatus for dispensing a liquid utilizing surface tension of the liquid for control of amount dispensed.

Abstract: The organic photochromic composition of this invention comprises spiro [indoline-2,3'-[3H]-naphth [2,1-b] [1,4] oxazine] (SO) dye and an unconventional ultraviolet stabilizer. The ultraviolet stabilizer improves the light fatigue resistance of the SO dye and will not hinder the photocolorability of the photochromic composition.

Abstract: A test lens and a photo-detector array are fixed in position along an optical axis a fixed distance from each other. Light is reflected by the front and rear surfaces of the test lens through an objective lens and is detected by the photo-detector array. The detected light is processed to produce a pixel count by video processing electronics. Control electronics adjusts the focusing of the objective lens by incremental displacement along the optical axis during a measurement cycle and significant focus position data is obtained from the video processing electronics to determine best focus location from which test lens data is derived.

Abstract: A safety goggle including a one-piece wrap-around front with hinged temples continuing rearwardly therefrom. The goggle features improved anti-fogging ventilation and universal nasal area face fitting.

Abstract: A circular array of accordian pleated filter material is core and edge sealed, placed in a supporting shell, peripherally sealed thereinplace and capped. Core sealing of the array of filter material is accomplished with a fill of hot melt adhesive and edge sealing with application of a covering strip of the same or a similar hot melt adhesive. An overlay of heat shrinkable tape provides final tight sealing and rigidification of the structure.

Abstract: A cut and/or ground ophthalmic lens surface is finished to optical smoothness and clarity by direct coating with a transparent liquid material which is curable into a clear, tough and tenacious laminate.

Abstract: A lens surface is taped for protection during second side finishing and excess tape is trimmed from the lens with a heated cutting wire.

Abstract: A fixture for evenly distributing a predetermined clamping force about annular mating surfaces of a two-piece lens casting mold for avoidance of unwanted cast lens prism and/or edge flash.

Abstract: A container with a liquid-impervious, vapor-permeable membrane for sterilizing lenses and storing them using the buffered hydrogen peroxide saline solution. The container is also provided with catalytic means to decompose the hydrogen peroxide following termination of the sterilizing period with the membrane permitting escape of the gases produced by the decomposition while preventing passage of liquid therethrough.

Abstract: A lens is formed of a section of glass clad glass rod ground and polished to a spherical shape of radius of curvature equal to that desired of a face of the lens. Remaining leachable cladding glass is removed leaving the lens with finished spherically curved opposite ends and an adaptability to modification by transaxial cutting and flat face finishing for plano-convex applications.

Abstract: A respirator filter formed of a cast polymeric matrix having a controlled porosity and inclusion of toxic gas absorbing and/or neutralizing chemicals. The chemicals are introduced into the casting precursor or added after polymerization, e.g. by imbibition with a solvent carrier and deposition by solvent evaporation.

Abstract: A timer controlled container inverting apparatus is constructed and arranged to commence timing out for container inversion only after setting of proper inversion time and reception of the container in the apparatus e.g. a vial containing a contact lens in sterilizing solution and oriented for sterilizing process commences process timing only upon application of the vial to the timing apparatus. Shortening of proper sterilizing time is prevented and inversion is effected rapidly at completion of the sterilizing process.

Abstract: Organic photochromic materials comprising a photochromic dye and a resinous material can be stabilized with a protective coating which will protect them from deactivation by exposure to moisture, oxygen, various plastic host materials, reactive chemicals or even normal atmospheric conditions. Useful organic photochromic dyes include the spiropyrans, the spirooxazines, the metal dithizonates, the phenazines, the phenothiazines and other known photochromic compositions. Useful resinous materials include vinyl-type thermoplastics, cellulosic materials, polyesters, epoxy resins and aminoplast resins. The encapsulated photochromic materials of the invention comprise an organic photochromic dye in combination with an organic resinous material enclosed within an outer shell of an inorganic material and find use in the preparation of photochromic plastic films, sheets, ophthalmic lenses such as lenses for sunglasses and in camera lenses and filters.

Abstract: An array of gradient refractive index lenses designed to produce an erect image of an extended object. The lenses are supported in a matrix of light-absorbing cladding glass for stray light control.

Abstract: Photochromic compounds of the formula ##STR1## wherein one of R.sub.1 and R.sub.2 is halogen or lower alkoxy, and the other is hydrogen, R.sub.3 and R.sub.4 are hydrogen, lower alkyl, lower alkoxy, or halogen and R.sub.5 is an alkyl of 2 to 10 carbons, and their use in lenses are disclosed.

Abstract: A velocity profile analyzing device measures the change or non-linearity in the velocity of a system under test, and digitally displays the measured variation. The principle of operation is to determine any velocity differences that occur in relation to an ideal state, and to present via a digital display the difference value. The system derives from a linear encoder a velocity representative signal, which includes a grating output coupled to a first counter, and an index output for simultaneously starting the first counter and a second counter coupled to receive a reference frequency signal. The counter outputs are fed to a digital subtractor which provides a digital difference frequency signal for digital display and recording. The digital display may be scaled to directly indicate velocity difference, which can be analyzed for various cyclic or other perturbations without accommodating the whole range of deviation.

Abstract: Lower inhalation resistance in respirator cartridges designed for protection against aerosols is accomplished with lower production cost and improved design distributing aerosol loading over greater surface area of filter material.

Abstract: A four component 10.times. microscope objective having a concavo-convex negative triplet as the third element providing sufficient color correction to permit classification as a semi-apochromatic objective is disclosed.