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Magician Harry Houdini patented a "Diver's Suit" enabling the wearer to "quickly divest himself of the suit while being submerged and to safely escape and reach the surface of the water."
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| Number | Title | Issue Date |
| 4243399 | Method of producing a coupling element for an optical transmission fiber Method of producing a coupling element for coupling a laser radiation source to a monomode optical transmission fiber. The end of the fiber is monotonically flattened at a temperature at which the fiber's core has a viscosity of between 107 to ... | 01/06/1981 |
| 4163541 | Mold for the casting of resin ophthalmic lenses having a prismatic segment A mold for casting a resin ophthalmic lens is comprised of a glass disc defining a principal casting surface on one face thereof. The casting surface is a portion of a surface of revolution which has a first axis of symmetry and which has, at a location a... | 08/07/1979 |
| 4163655 | Method of manufacture of molds for resin ophthalmic lenses having a segment with prismatic optical effect A method is described for making molds for the casting of resin ophthalmic lenses having segments of prismatic optical effect. A first mold surface is formed in a first blank. A second blank, having a recess therein shaped to the outline of the desired le... | 08/07/1979 |
| 4143940 | Device for coupling a radiation source to a monomode optical transmission fiber with the aid of a resonant cavity A device for coupling a radiation source, i.e. a laser resonator to a monomode optical transmission fiber with the aid of a resonant cavity wherein the laser resonator forms part of the resonant cavity and the end of the transmission fiber adjoining the r... | 03/13/1979 |
| 4139677 | Method of molding glass elements and element made A method of molding glass elements requiring no further preparatory operations such as grinding or polishing before use wherein a portion of glass is heat-softened and subjected to pressure in a mold having molding surfaces formed of silicon carbide (SiC)... | 02/13/1979 |
| 4137060 | Method of forming a lens at the end of a light guide The jacket of a cored light guide is completely or partially etched away; or, if the light guide is a gradient fiber guide, it is etched to about the light guiding diameter. A lens is then adhered to the end of the fiber, the lens being made of a material... | 01/30/1979 |
| 4128411 | Glass compositions having fluorescence properties The invention relates to a method for producing glass, in which an oxide ss is mixed with a reducing agent and a combination of compounds which provide a dopant, donor-acceptor ion pair. This ion pair is selected from the group consisting of trivalent th... | 12/05/1978 |
| 4108621 | Process of producing soft aperture filter A process for producing a soft aperture filter having high acid and heat resistance as well as a desired colored layer thickness comprising heat-treating a glass, having a base composition of 55 to 72 mole percent SiO2, 15 to 35 mole percent Na... | 08/22/1978 |
| 4073579 | Ophthalmic lens with locally variable index of refraction and method of making same Ophthalmic lenses with locally variable indices of refraction produced from microporous glass bodies diffused with inorganic salts and rendered transparent by heat treatment. Local variations in refractive index result from differences in concentrations o... | 02/14/1978 |
| 4071343 | Method of making intraocular lenses Optical sections (lenses) of pseudophakoi having tangential holes are produced without drilling operations. A preform of lens material is drawn with embedded acid soluble rods and/or openings corresponding in diametral size and relative juxtaposition to t... | 01/31/1978 |
| 4067937 | Method for forming a light transmission glass fiber equipped with an optical lens An optical lens equipped glass fiber is formed by bringing at least one end of a glass fiber into contact with an optical lens forming liquid-like material with the liquid-like material deposited onto the end of the glass fiber in a manner to have a curva... | 01/10/1978 |
| 4065283 | Method for making a glass-based soft-edged aperture filters Glass-based soft-edged aperture filters having good thermal stability are produced by diffusing a coloring element such as Ag into a glass, thus providing a transmittance gradient in the colored portion thereof. A glass composition comprising a basic glas... | 12/27/1977 |
| 4031423 | Channel structure for multi-channel electron multipliers and method of making same An electron multiplier channel structure having channel walls formed of alternate strips of different glasses. One glass has optimum electrical conductivity properties and the other glass has optimum secondary electron-emitting properties. The strips are ... | 06/21/1977 |
| 4017292 | Process for making multifocal photochromic ophthalmic lens Multifocal photochromic opthalmic lenses are produced by nucleating potentially photochromic major lens blanks through heat treatment, combining the nucleated blanks with compatible button or segment glasses, and fusing the combined glasses at temperature... | 04/12/1977 |
| 4008061 | Method of making optical fiber optical power divider An optical power divider is disclosed for single mode optical fibers. The fibers to be coupled are inserted in converging bores in a lower refractive index glass block which is collapsed about the fibers and drawn down. In the drawn down region the fibers... | 02/15/1977 |
| 3980399 | Aspheric optical elements An optical element comprising a glass substrate on which a plastics material defining an optical surface is moulded. Shrinkage of the plastics material during curing is compensated for by allowing the glass substrate to deform due to the shrinkage, and op... | 09/14/1976 |
| 3976364 | Optical air lens system In an optical system the use of a plurality of air lenses set in an optical medium of higher refractive index than air at a predetermined distance from an object such that various optical aberrations are minimized or eliminated by using aplanatic optical ... | 08/24/1976 |
| 3975093 | Photochromic multifocal lenses A high index of refraction, low softening point, low expansion segment glass is fused into a countersunk photochromic glass blank of lower index of refraction. The high index of refraction segment is primarily composed of SiO2, B2 O | 08/17/1976 |
| 3975092 | Photochromic multifocal lenses A high index of refraction, low softening point, low expansion segment glass is fused into a countersunk photochromic glass blank of lower index of refraction. The high index of refraction segment is primarily composed of SiO2, B2 O | 08/17/1976 |
| 3966311 | Method of producing photochromic multifocal spectacle lenses A method of producing photochromic multifocal spectacle lenses by fusion of a reading segment with a photochromic major lens portion. The reading segment and the main photochromic portion of the lens are fused together at a temperature which does not adve... | 06/29/1976 |
| 3946982 | Adjustable mold for direct casting of plastic multifocal lenses Apparatus for finish casting of bifocal ophthalmic lenses from plastic material is described. No further surface grinding or polishing of the lens is required. The portion of the bifocal segment of the lens may be adjusted to any desired location relative... | 03/30/1976 |
| 3930824 | Method of forming laser components Glass compatible metal matrices are mounted in a glass forming boat and slugs of glass are applied to each. Heat is provided such that openings in the matrix are glassed, whereupon the entire sheet may be ground, polished, or otherwise processed as desire... | 01/06/1976 |
