Abstract: A core includes a plurality of core segments each of which has a tooth around which wire is wounded in the form of a coil. The core segments are designed to have the coils in a concentrated winding form and also in a m-series-connected-coil and n-parallel-connected-coil delta configuration where m is a natural number more than or equal to two, and n is a natural number or in a k-series-connected-coil and n-parallel-connected-coil delta configuration where k is an even number, and n is a natural number. The coils include U-phase coils working for a U-phase, W-phase coils working for a W-phase, and V-phase coils working for a V-phase. The U-phase coils, the W-phase coils, and the V-phase coils are arranged alternately in a first circumferential direction of the core. The winding also includes a plurality of power input wires and a plurality of coil-to-coil connecting wires.

Abstract: A drive device includes a reduction drive, an accommodation portion, and an output unit. The reduction drive includes at least two resin helical gears meshed with each other. The at least two helical gears include an output-side helical gear and another helical gear. The output-side helical gear is located closer to the output unit than the other helical gear in a power transmission path of the reduction drive. The housing cover includes a restriction portion located within a range that includes a straight line intersecting the first center axis and the second center axis. The restriction portion projects toward a bottom of the gear accommodation portion. The restriction portion is configured to allow for slidable contact with the output-side helical gear to restrict axial bending of the output-side helical gear.

Abstract: A drive device includes a reduction drive, an accommodation portion, and an output unit. The reduction drive includes at least two resin helical gears meshed with each other. The at least two helical gears include an output-side helical gear and another helical gear. The output-side helical gear is located closer to the output unit than the other helical gear in a power transmission path of the reduction drive. The housing cover includes a restriction portion located within a range that includes a straight line intersecting the first center axis and the second center axis. The restriction portion projects toward a bottom of the gear accommodation portion. The restriction portion is configured to allow for slidable contact with the output-side helical gear to restrict axial bending of the output-side helical gear.

Abstract: Disclosed herein is an optical filter comprising: a resin material obtained by copolymerizing a monomer represented by the following formula (I) and a monomer copolymerizable therewith; and a metallic compound mainly composed of a copper compound;PO(OH).sub.n R.sub.3-n (I)wherein R represents ##STR1## (wherein X represents a hydrogen atom or a methyl group, and m is an integer of 0 to 5), and n is 1 or 2.

Abstract: Disclosed herein is an optical filter comprising: a resin material obtained by copolymerizing a monomer represented by the following formula (I) and a monomer copolymerizable therewith; and a metallic compound mainly composed of a copper compound;PO(OH).sub.n R.sub.3-n (I)wherein R represents ##STR1## (wherein X represents a hydrogen atom or a methyl group, and m is an integer of 0 to 5), and n is 1 or 2.

Abstract: A data management method and system of memo information utilizing a data base can store personal memo information at a high storage efficiency and a high retrieval efficiency without adding a retrieval key to the data base. The data management system may be constructed by connecting a work station having a file for storing memo information to an existing data base system. The system has keys for indicating records of the data base and storage addresses of the corresponding memo information as a connective index file, and refers to it to store, retrieve or delete the memo information. A plurality of memo information for the same record may be displayed on a display of the work station in a time sequence and the memo information are paged.

Abstract: A resin-made heat-resistant optical fiber is formed of a core of a hardened thermosetting resin and a cladding of a polymer or copolymer having a refractive index smaller by at least 1%, preferably, at least 3% than that of the core. The thermosetting resin is selected from the group consisting of epoxy resins, phenol resins and urethane resins. The polymer or copolymer may preferably be a thermoplastic organic resin.

Abstract: A photochromic lens is composed of a lens member made of a lens resin; and a photochromic layer applied on at least one side of the lens member and formed of a resin of a three-dimensional network structure. The layer-forming resin contains a spirooxazine compound represented by the following general formula (I): ##STR1## wherein R.sub.1 means a hydrogen or halogen atom or a cyano, C.sub.1-6 alkyl or C.sub.1-6 alkoxy group, and R.sub.2 denotes a C.sub.1-6 alkyl group, --CH.sub.2).sub.n COOH, --CH.sub.2).sub.n CN, substituted arylalkyl group or --CH.sub.2).sub.n COOR in which R is a C.sub.1-6 alkyl group and n stands for an integer of 1-4. The layer-forming resin may additionally contain a phenol resin and/or a phenolic compound. A hard coat layer may optionally be applied on the surface of the photochromic layer.

Abstract: A halogen-containing resin lens material, having a refractive index of n.sub.D =1.55 or higher, an Abbe number of 27 or higher and good dyeable property and comprising a copolymer containing 10 to 90 wt. % of a monomer (I) represented by the formula (I) shown below: ##STR1## wherein: R.sup.1 represents hydrogen or CH.sub.3 group; X.sup.1 a halogen atom except for fluorin; and p the number of substituted halogens which is an integer selected from 1 to 5, and n is an integer selected from 1 to 4, R.sup.1 existing in plural number and being either identical or different, X.sup.1 when existing in plural number being either identical or different and 10 to 70 wt. % of a crosslinking monomer having two or more polymerizable functional groups (the percentages being based on the copolymer weight).

Abstract: Compositions each comprising a copolymer of a specific allylic or (meth)acrylic compound of an iodine-substituted benzoic acid derivative and a comonomer have a refractive index n.sub.D.sup.20 of at least 1.58 and an Abbe's number of at least 28 and are excellent starting materials for the production of high quality lenses.

Abstract: A lens material having a refractive index n.sub.D.sup.20 of at least 1.57 or more and an Abbe's number .nu. of at least 30, comprising: a copolymer comprising (I) 10 to 85% by weight of a halogen-containing monomer represented by the following formula (1), (II) 15 to 90% by weight of a halogen-containing monomer represented by the following formula (2), and (III) 0 to 20% by weight of a monomer copolymerizable with the above mentioned monomers, the composition of the copolymer being based on the total quantity of the monomers (I), (II), and (III): ##STR1## wherein: D represents ##STR2## in which n represents an integer selected from the group consisting of 0, 1, and 2; each R.sup.1 represents hydrogen or a methyl group; Y represents CHOH; and r represents 0 or 1; each of X.sup.1 and X.sup.