An aspheric lens for providing improved vision and a method for generating such a lens is described. The lens provides a sharp image focus while minimizing image aberrations. The method utilizes ray tracing techniques in conjunction with Modulation Transfer functions to accurately account for the total corrective lens-eye system. The lens may be in the form of a contact lens, an intraocular lens, ...

A carbonaceous article, e.g., a carbon or graphite crucible or mold, is provided with an oxidation prohibitive coating comprising a rigid, glassy, ceramic, refractory material containing mullite and silicon carbide or boron carbide or both. The carbonaceous article has a coefficient of thermal expansion which is greater than about 1.5x10-6 inch/inch/ DEG C.

Improvements are made in a panty protector (10) of the kind comprising adhesive attachment (16) and provided with transversely extending flaps (24). The peripheral shape of the protector is such that it is possible to produce the sheet of material of construction for the protector (10) and simply cut said shapes out of said sheets with minimal waste.

An optical information recording and reproducing apparatus comprises: a laser light source having a Gaussian intensity distribution of an emitted laser beam; an optical system for focusing the laser beam emitted from said laser light source, having a number of aperture NA represented by $where\; lambda\; is\; a\; wavelength\; of\; the\; laser\; beam\; emitted\; by\; said\; laser\; light\; source,\; and\; omega\; 0\; is\; a\; di...$

An apparatus is described for scanning an optical record carrier (1) in which a radiation beam (b) emitted by a source (4) is focussed by a lens system (6) and in which radiation reflected by the record carrier is focussed in two radiation spots (V1, V2) each co-operating with a separate detector pair (18, 19; 20, 21). Acombined beam-separating and beam-splitting element is constituted by a diffra...

To the transmission path (4) is applied a test signal (M') formed from a sequence (m) with spectrum components (S1 ... S10) equidistantly distributed in the frequency range by linkage to an additional function (ZSF). The additional function (ZSF) is selected in such a way that the test signal (M') contains additional spectrum components (ZS1 ... ZS21) besides the spectrum components (S1 ... S10) o...

A multiway valve, in particular a 4/2-way valve, has a housing provided with an axial hole having a plurality of steps to form four seat elements located one behind the other. The housing includes two end chambers and at least two intermediate spaces between these end chambers, with one of the valve connections opening into each. A spool-type drive pin carrying at least two closing elements is loc...

Electroconductive porous inorganic material (I) contains porous inorganic substance (II) and 0.1-50 (wt.)% semi-conducting metal oxide (III). Pref. (III) is SnO2, CO2 and/or ZnO. (I) may also contain 0.1-10% oxide of another metal with valency less than 4 and/or 0.1-3% oxide of a metal catalysing the reaction of CO to CO2. (II) is an aluminosilicate or Al phosphate. The metal oxides are applied to...

A filler for patterning of ceramics product, comprising a slip composed mainly of a ceramics base material having a binder and a pigment added therein formed into particulate.

A safety device for an internal combustion engine powered implement and for disabling the operation of the internal combustion engine by means of a brake. The safety device includes a braking lever (40) and a control lever (60) which are both mounted on a single pivot member (38). Two springs (46,66) are provided, the first of which normally urges the braking lever into contact with the flywheel (...

Mounting apparatus for expandable honeycomb insulation panels includes a head rail for anchoring the panel to a window jamb or wall and a sill rail at the opposite end of the honeycomb panel for contracting and expanding the honeycomb panel to move it upwardly and downwardly over the window surface. Lift mechanisms for the sill rail include a vertical drop cord lift system, a parallel bar cord gui...

The drop arm (4) has roller-bearinged and in the folded-in state is movable downwards to the stop body with which is engages, being pivotable outwards in this engaged position around a pivot axis (4.1). Out of engagement with the stop body it is movable upwards only in the folded-in state. The stop body (3) is a bearing shell body fixed to the guide rail (2) with a bearing shell (30) open to the p...

The fixture fillet (10) is releasably arrested in the holder (42,45) by a displaceable lock (41). One or more of the fixtures (42) of the holder has/have available a head extending out of the shaft wall (1). The fixture fillet (11), via a corresp. number of holes, has a head with an insertable bush (45) and extending over the dia. of the holes or a mouth-shaped opening directed towards the shaft w...

Textile floor covering, consisting of a raw textile cloth (2) and of a back coating (3) connected to the latter, the back coating (3) consisting of a textile surface cloth formed at least partially from textile fibres, the fibres (3a) of the surface cloth being connected completely or partially to the raw cloth (2) by needling, and the depth of penetration of the needled-in fibres (3a) being small...

The roll shutter/sunroof drive uses at least one driven gear to transfer force to a flexible textile traction element. The element should consist of a belt (18) which is guided in a clamping gap (44) between the opposing tooth flanks (30, 34) of two meshing gears (23, 24) so the belt is Z-formed positively in the gap. Pref. one of the opposing gears can adjust in a guide (42) so as to vary the cla...

The printer includes an array of jets (4). A dye tank (1) contains a high m.pt. dye. The dye is solid at room temp. and becomes fluid and contracts when it is warmed to its m.pt. The dye expands when the fluid is cooled to room temp. A dye supplying tube (3) has an inlet connected to the dye tank. An outlet is connected to the array of jets to supply dye to the array. The tube is formed from an el...

In order to provide a device for avoiding sunrays shining in directly through windows, by means of which device the situation where sunlight shines directly on working areas near the window is avoided and also sufficient light density is produced in areas of the room remote from the window, it is proposed that the window surface (2), in a region (6) which is at the bottom in the installed position...

2120766 9308221 PCTABS00021 Elastic substantially linear olefin polymers are disclosed which have processability similar to highly branched low density polyethylene (LDPE), but the strength and toughness of linear low density polyethylene (LLDPE). The polymers have processing indices (PI's) less than or equal to 70 percent of those of a comparative linear olefin polymer and a critical shear rate a...