Abstract:
A cast resin for optical use is obtained by polymerizing 40 to 89 wt % of a diallyl phthalate component represented by the formula (I) ##STR1## wherein --R.sub.1 is a hydrogen atom or a methyl group, --OR.sub.2 is a dihydric alcohol residue having 1 to 5 carbon atoms and m is an integer of from 0 to 20, 10 to 59 wt % of an alkylene glycol bis-allyl carbonate component represented by the formula (II) ##STR2## wherein --R.sub.4 is a hydrogen atom or a methyl group, --OR.sub.3 is a dihydric alcohol residue having 1 to 10 carbon atoms and n is an integer of from 0 to 10, and 1 to 30 wt % of a vinyl compound represented by the formula (III) ##STR3## wherein --R.sub.5 and --R.sub.6 stand for a hydrogen atom or a group ##STR4## wherein X and Y each indicate a hydrogen atom or a halogen atom other than a fluorine atom.
Abstract:
As N-substituted maleimide polymer composition contains 20 to 90 parts by weight of an N-substituted maleimide polymer and 80 to 10 parts by weight of a thermoplastic resin selected from a polycarbonate polymer, a polysulfone polymer, a polyphenylene ether polymer, a polyarylene sulfide polymer, and a modified polymer of the polymer or polymers, a polyoxymethylene polymer, a polyester polymer, a polyamide polymer and mixtures thereof.
Abstract:
Disclosed herein are aluminum alloy fin materials useful for heat exchangers which consists of, in weight percentage, 0.8 to 1.8% Fe, 0.3 to 3.0% Zn, up to 0.3% Cu and at least one element selected from the group consisting of 0.05 to 0.25% Zr and 0.05 to 0.25% Cr, with the balance being Al and unavoidable impurities, wherein Mn in the unavoidable impurities is 0.3% or less. The fin material being characterized, after brazing, by its superior thermal conductivity and beneficial sacrificial anode effect. The fin material is also suitable as a core of a brazing fin material in combination with an Al-Si alloy brazing material in which the Al-Si alloy brazing material is clad as an outer cladding layer onto both sides of the core. The above unclad or clad fin materials can provide heat exchangers having high corrosion resistance and good heat transfer characteristics in combination with a fluid passage material made of brazing sheet or an extruded tube of pure aluminum or an aluminum alloy with not more than 0.5% Cu and/or not more than 0.5% Mn.
Abstract:
A novel peroxydicarbonate containing a non-conjugate type unsaturated bond, represented by the general formula: ##STR1## (wherein R.sub.1 stands for a hydrogen atom or a methyl group and n for an integer of the value of 1 or 2) is particularly useful as a polymerization initiator.
Abstract:
In a sewing machine which has a conventional needle amplitude adjusting device and a conventional fabric feed adjusting device are used as a detector for receiving an input of an information of a stitch coordinate, and an connector member is provided which is adapted to move said devices vertically and laterally. The operating member is attached to the sewing machine. When the operating connector member is moved and this movement is designated to be stored, a value of each of vertically and laterally crossing components of said member is detected, respectively, in said devices, and each of said values is stored in a random-access-memory. If the operating connector member traces a desired pattern sample and the memory designation is operated, the data of a continuously stitching coordinate of said desired pattern are stored.
Abstract:
A computer sewing machine having a plurality of sewing related operating functions and including voice generating components driven by a drive signal and producing voice information concerning various information items including at least malfunctioning and their explanations and handling and their explanations for the sewing machine, process designation input components for producing signals for starting the process of the information items produced from the voice generating means, response input components including at least two switches selectively operated to produce signals to affirm or negate the information items produced by the voice generating components, reception/discrimination components for receiving the signals from the process designation input components and from the response input components to discriminate the designation of the information items, a stitch control device, malfunction diagnosing components for diagnosing malfunctions of the sewing machine on the basis of control operation of the stitch control device to produce signals indicating a malfunction of the sewing machine, specifying components for receiving the signals from the malfunction diagnosing components and from the reception/discrimination components to specify the information items, a language signal storing memory containing language signals, and language synthesizing components operated by the signal from the specifying components.
Abstract:
A displacement - electricity transducer contains a movable magnetic core and a fixed magnetic core oppositely arranged so as to have predetermined gaps or clearances in at least two places. Two substantially closed magnetic circuits, each including one of the gaps, are formed by both magnetic cores, so that when the movable magnetic core is displaced relative to the fixed magnetic core while maintaining a predetermined spacing therefrom, the substantially opposite area of the gap portion in one of the magnetic circuits increases, while the substantially opposite area of the gap portion in the other magnetic circuit decreases. A first coil is wound around a part common to the two magnetic circuits, while a second coil is wound around a part not common thereto. By applying an alternating current to the first coil, an output responsive to the displacement of the movable magnetic core is derived from the second coil.
Abstract:
Provided is an alkaline developable photosensitive resin composition which does not contain crude particles, has excellent storage stability, can avoid the deterioration of working environments, and contains few substances toxic to human bodies. The alkaline developable photosensitive resin composition is characterized by comprising (A) a resin containing a carboxyl group, (B) a photopolymerization initiator, (C) a compound having at least two ethylenically unsaturated groups per molecule, and (D) a dibasic acid ester.
Abstract:
In a hot press molding method for press-molding a heated material and cooling the material while holding the material in a mold, during press molding of the material, shape changes including a portion that curves with respect to a longitudinal direction of the material are molded at longitudinal opposite end portions of the material and resistance to thermal contraction force of the material in the longitudinal direction during cooling is imparted. In one embodiment of the present invention, the shape changes molded on the material during the press molding are minute protrusions provided on surfaces of the longitudinal opposite end portions of the material. The invention makes it possible to suppress thermal contraction of the material during cooling in hot press molding to thereby prevent defects associated therewith.
Abstract:
A heat sink including a base section, connection fins, and parallel fins. The base section includes: a first base plate configured to be mounted with a heat generating component on its outer surface; a second base plate disposed to face the first base plate in a parallel manner, configured to be mounted with a heat generating component on its outer surface; and a third base plate disposed perpendicular to the first base plate and the second base plate, which secures the first base plate and the second base plate along a junction line. The base section includes first and second regions arranged in the direction of the junction line. The connection fins are disposed on the first region to connect inner surfaces of the first and second base plates and to be parallel to the third base plate, and the parallel fins are disposed on the second region from an inner surface of the third base plate to be parallel to the first base plate.