Abstract: A picture post card, which comprises a card body having one surface kept cleared and an opposite surface provided with an image; a translucent hard synthetic resin film laminated on one surface of the card body, enabled for entry of an address and message; and a transparent hard synthetic resin film laminated on said opposite surface of the card body for maintaining quality of the image.

Abstract: A Fresnel lens in use for a projector lens comprising a glass plate, a Fresnel lens body integrally formed on one surface of the glass plate, and a reflective layer formed on an annularly grooved surface of the lens body. The present invention provides a Fresnel lens, fabricated with a low cost, having sufficient hardness as a document support and free from any of ghost images or image distortions when used in a projector.

Abstract: An ion source for a quadrupole mass spectrometer comprises, from the upstream end to the downstream end in the axis of the quadrupole, an ionization chamber with heated filament and electrostatic field associated with an electron-optical system provided with an electron convergence device. A uniform magnetic field is superimposed on the electrostatic field of the ionization chamber. The electron-optical system comprises a first extraction electrode having a downstream surface which is at least approximately spherical, a second coaxial electrode in the form of a disk having a central orifice of relatively substantial width and, at a short distance, a third electrode in the form of a disk having a relatively small central orifice, the potentials of the electrodes being so adjusted as to form hemispherical equipotential surfaces between the first and the second electrode.

Abstract: A mass spectrometer with quadrupole filter comprises a spectrometer chamber containing the ion source, its associated electron optical system, and a quadrupole filter. The chamber is designed in the form of a hollow sleeve closed at one end by a removable leak-tight cover mounted on a longitudinally-sliding motor-driven carriage which also supports the ion source and its optical system. The carriage is capable of selective displacement in translational motion between a closed position in which the ion source is in the work position and the cover is in the closed position, and an open position in which the carriage projects outside the casing at least to a partial extent and allows access to the ion source and its associated optical system.

Abstract: A connecting pipe part of a resilient material for connecting a closet bowl to a drain conduit comprises on one end a female part for receiving an outlet of a closet bowl and on the other end a male part to be received into a drain pipe or conduit, while a sealing sleeve connected with the female part extends within the female part.Said sealing sleeve merges through a discontinuously thinned transition. Into the female part, the thickness of the sleeve being thinner than the thickness of the female part.The transition is preferably located halfway in a plane parallel to the inner wall of the female part, said plane being located midway between the inner side of the female part and the extension of the inner side of the male part.End part support members extend in the direction of the male part.

Abstract: An electrolytic type level sensor is secured atop spaced posts of a ceramic pedestal by applying epoxy only about the periphery of each post where it contacts the glass container of the level sensor and so that the glass container otherwise rests upon the posts. A thermal shunt of flexible braided copper is disposed about the glass container and is urged snuggly thereagainst by heat shrinking a plastic tube about the thermal shunt. The ceramic pedestal is received in an opening of a mounting plate and is urged by a spring pin against a "v" block type seat formed in the opening to establish points-of-contact therebetween. Epoxy is applied between the pedestal and opening to secure same together except at said points-of-contact. Plastic insulation is disposed about the sensor and pedestal and otherwise fills spaces in a housing for same and attached to said mounting plate.

Abstract: Fibers and fabrics formed from polypropylene as well as other polyolefins and high polymers, are rendered flame retardant by the addition of a bromophenyl compound having the following formula: ##STR1## wherein n is 0 or 1; X is bromine, hydrogen, hydroxyl, or alkyl; and wherein the alkyl portion of these groups may contain hydroxyl and/or oxygen; and wherein the alkyl is preferably a lower alkyl (C.sub.1 -C.sub.4); and wherein there is at least one bromine for each phenyl radical; and a tris (hydroxybenzyl) isocyanurate, particularly tris (3,5-di-t-butyl-4-hydroxybenzyl) isocyanurate. The composition of formula (I) and the isocyanurate are blended into the polymer in the forming operations and the polymer blend is thermally extruded to form a fiber which fiber exhibits exceptionally high flame retardancy, as well as a good white appearance upon extrusion so as to be readily dyed without grey overtones.

Abstract: A chair for human dental or medical treatment and having an improved adjustable headrest support. The chair features a flat curved linear strip member which extends between the headrest and the main frame of the chair. The strip member is guided by at least one, and preferably two pairs of opposed cylindrical guide rollers which contiguously straddle the strip member, so as to guide the motion of the strip member along its longitudinal axis, as it is displaced along its axis and towards or away from the frame, typically by a hydraulic mechanism. This makes possible vertical direction of movement of the strip member. The hydraulic mechanism, or two mechanisms in tandem, are a pivoted floating mounting for the strip member which facilitates ready adjustment of the headrest support relative to the main frame and seat of the chair. At least one tension spring is provided to produce smooth backdown of the piston plunger and piston head when hydraulic fluid pressure in the cylinder is reduced.

Abstract: A cable or other linear length of flexible material, such as high strength wire, is initially wound on a reel, and is unwound by the application of a force, typically a movable object moving downwards through the air under the influence of gravity. The motion of the cable in unwinding from the reel is effectively braked, or slowed, by providing a cable brake system or systems which generate resistance to the unwinding of the cable. One system entails the provision of frictional control means consisting of a soft, tough, material matrix disposed about the reel, so that the cable is imbedded in the matrix. Payout of the cable, as the reel revolves, requires the cable to be torn out of the matrix. The other system entails immersing the reel, and associated cable wound on the reel, in a viscous fluid, so that the unwinding of the cable from the reel causes the reel to turn about its axis in the viscous fluid, thereby producing resistance to motion and a braking action.

Abstract: The present invention discloses an apparatus for the alignment of bottles, which apparatus has no moving parts, and includes an assembly of trough and slide surface. The trough is substantially parallel to the major axis of the bottles. The bottles descend the assembly under the influence of gravity. Bottles which are aligned proceed as directed by the trough whereas non-aligned bottles are diverted away from the trough.