Abstract: A coating composition which results from hydrolyzing 40 to 70 weight per cent tetraethyl orthosilicate and 60 to 20 weight per cent of certain silane is useful for providing abrasion resisting coatings for plastics after curing. Optionally, up to 20 weight percent of a silane having a reactive polar site or, in the alternative, a small percentage of a surfactant may be used to provide a dyeable coated article.

Abstract: A dispenser having a plurality of row-arrayed compartments each for releasably retaining a razor blade cartridge therewithin. The opposite ends of the compartments are respectively formed by a partition wall and yieldable, free-standing retention means positioned such that the end of one compartment is not in common with the opposite end of the next compartment, thereby making the compartments independent of one another to minimize the cumulative effects of oversize cartridge tolerances. The free-standing fingers also reduce the force required to manually load cartridges into the dispenser during assembly.

Abstract: A cutter for edging plastic lenses to desired finished shapes and sizes including a main supporting wheel having an effective cutting edge formed of a multiplicity of circumferentially spaced replaceable cutting blades for clean chip clearance and ready accessibilty to individual removal sharpening and/or replacement as needed.

Abstract: A solid water-soluble shaving aid incorporated in a disposable razor blade cartridge which gradually dissolves during the act of wet shaving. The shaving aid, in the form of a lubricant, whisker softener, razor cleaner, medicinal agent, cosmetic agent or combination of the above is embedded, dispersed into, formed as an integral component of, or otherwise affixed to the cartridge structure adjacent the shaving edge or edges of single or multiple blades supported therein.

Abstract: Light fatigue resistant, non-orange, photochromic mercury complexes of asymmetrical diarylthiocarbazones for use in making photochromic sunglass lenses, ski goggles, and the like. The compounds comprise the class of mono and bis mercury diarylthiocarbazonates wherein one aryl group is an aryl group substituted at the ortho position with an electron withdrawing group such as CF.sub.3 and the other aryl group is different from the first and can comprise variously substituted or unsubstituted phenyl or naphthyl groups.

Abstract: Improved slew recovery in a composite driving amplifier for driving a substantially reactive load including a feedback loop to the operational amplifier from the load for regulating the output of the amplifier, the composite amplifier has a predetermined resistance R1 in the feedback loop and includes a second feedback loop having a predetermined resistance R2. The second feedback loop extends from the output of the operational amplifier to the negative input and is substantially parallel with the first-mentioned feedback loop. To maximize the recovery of the amplifier from a slew condition, the relationship of R1-R2 should be as follows: ##EQU1## wherein: V.sub.o is the output voltage in the amplifier.Slope, is the slope of the load voltage curve during the overload condition, andDelay represents the period of time it takes the overload operational amplifier to respond to a feedback signal at a given overload condition.

Abstract: A defibrillator, or alternatively, paddles therefor adapted with the wave-forming inductance of the discharge circuit disposed between the two paddles of the discharge circuit of the defibrillator and is so disposed in the paddles as to couple in a cancelling manner when the paddles are placed face-to-face. In a preferred embodiment, the waveform inductance is split substantially equally in each of the two paddles wherein each of the inductors have a value of substantially half the total necessary inductance for the forming of the waveform for the defibrillating wave.The respective coils of the inductors are wound in reverse directions, one with respect to the other so that the total inductance generated in a discharge directly through the paddles is substantially nil.

Abstract: There is disclosed a glass ophthalmic lens including an ion-exchanged antireflection coating. Metal oxide films including TiO.sub.2, CeO.sub.2, ZrO.sub.2, La.sub.2 O.sub.3, Nd.sub.2 O.sub.3, Al.sub.2 O.sub.3, and SiO.sub.2 when evaporated on glass lenses in a vacuum chamber by electron-beam techniques form hard optical coatings which are chemically stabile at high temperatures and allow potassium and sodium ions to traverse the thickness thereof without changing chemical composition or physical integrity thereby enhancing ability of glass lenses to be ion-exchanged in a conventional ion-exchange treatment. This allows antireflection coated glass lenses to pass impact-resistant standards ANZI Z80.1 for prescription ophthalmic lenses and USAS Z87.1 for safety lenses.

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: Casting a contact lens directly to finished size, shape and edge configuration. Casting is accomplished between concave and convex mold halves which respectively provide lens front and base curve forming surfaces. The rim of the concave front-forming surface is circular and makes continuous line contact with a spherical surface extended annularly about the convex base curve-forming surface to produce a vanishing thin edge without flashing about the cast lens. Provision is made for modification of the cross-sectional configuration of the circular rim and/or annular mold surface according to changes in lens edge profile needed to meet particular requirements for optimum lens fitting comfort.

Abstract: Photometer means usable in scientific instrument having a video display means such as a scanning electron microscope including means for matching the intensity of the video display to the exposure time selected for photographing said video display taking into consideration such film characteristics as film speed, reciprocity failure and exposure time.

Abstract: A device for use in fitting lenses to spectacles frames wherewith ophthalmic measurements are applied directly to frames selected by patients. A frame without lenses is adjusted to fit the patient, the fitting device is applied to the frame and the whole placed upon the face. Measurements of distances from extreme lateral and inferior points on the frame rims to the patient's visual axis in the case of each eye are taken for use in edging the lenses to a size and shape which will locate their optical centers in coincidence with the patient's visual axes when the spectacles are glazed and put to use.

Abstract: The annular reflector for a dark-field, vertically-illuminated microscope objective must have a peculiar curvature to obtain a uniform distribution of the light on the object surface being viewed. Four reflectors are disclosed. Each reflector is suitable for use in a respective microscope objective.

Abstract: An injector-type razor into which a blade may be mounted by means of a blade dispenser. The razor comprises the two-part assembly of a plastic molded main frame with handle and a spring-tensioned blade seat.

Abstract: A support for a headrest characterized by an articulable arm having a locking system operable single-handedly for locking the arm at selected positions of adjustment and releasing for readjustment.

Abstract: A pair of identical bi-convex triplets, a mirror, and a pentaprism are used to extend the parallel light zone between the objective and the telescope lens of a conventional infinity corrected microscope system. Specific values for the components and spacings between the same are given.