Abstract: A groove (3) having a V-shaped section is provided on a bonding surface (1a) of an IC chip (1) being as a first small part, while an elongate projection (4) having a V-shaped section to engage with the groove (3) of the first IC chip (1) is provided on a corresponding portion of a bonding surface (2a) of an IC chip (2) being as a second small part (2). Then, the IC chips (1, 2) are bonded together by the action of a holding force resulting from fitting the elongate protection (4) of the second IC chip to the groove (3) of the first IC chip (1), together with a bonding force produced between the bonding surfaces by interatomic force and metallic bond.

Abstract: A pneumatic bearing motor with a pneumatic bearing capable of being downsized without lowering the mechanical rigidity thereof. A stator of the pneumatic bearing motor comprises a slot-less stator core and winding which is formed by winding a wire on the stator core into a toroidal shape in a maimer of regular winding. Since the stator does not have projections as exist in conventional stators, it is not necessary to form counterbores in a housing and make wall thickness of the housing large for bearing stress concentration caused by the counterbores. Thus, it is possible to reduce the wall thickness of the housing of the motor and downsize the motor.

Abstract: A stator structure for a motor of high precision by suppressing influence of electromagnetic noise between windings and a distribution pattern layer in a printed board. A shield is provided between the windings and the distribution pattern layer of the printed board to shield the electromagnetic noise and suppress the influence of the electromagnetic noise to thereby enable precise control of the motor. A multilayered printed board is arranged on an axial end face of the stator core and the windings are formed around the stator core and the multilayered printed board to enfold them toroidally in a regular winding manner. The multilayered printed board comprises a distribution pattern layer for connection with the windings and a shield layer for shielding electromagnetism between the distribution pattern layer and the windings.

Abstract: A winding of a motor is formed by coiling a wire around a slotless stator core with combination of troidal coiling and array coiling. The toroidal coiling is carried out in a manner such that the wire is coiled without any intersecting turns in one direction for the formation of the winding as it is coiled rotating spirally. By this coiling method, the accuracy of the position of the winding in the direction tangent to the surface of the stator core can be improved. The array coiling is carried out in a manner such that the winding is formed in layers that are stacked on one another. By this coiling method, the accuracy of the position of the winding in the direction normal to the surface of the stator core can be improved. Thus, the overall thickness of the winding can be made uniform.

Abstract: A plurality of electrostrictive elements 30 are located about the perimeter section of a table 2. The table is fixed to a table fixing member 3. The table fixing member 3 is prohibited from rotating by guide pins 19. When a servo motor 4′ constituting a rotational drive mechanism 4 is driven by passing a current through a stator 6 therein, the rotor 7 rotates. Thereby, the table fixing member 3, which has a female screw thread 10 that engages with a male screw thread 9 formed in the rotor 7, moves in a vertical direction. The table 2 also moves in a vertical direction and can be registered in a desired position. Inclination of the table 2 caused by processing errors in the male screw 9 and female screw 10 is adjusted to a horizontal position or a desired angle, by driving the electrostrictive elements 30.

Abstract: A winding of a motor is formed by coiling a wire around a slotless stator core with combination of troidal coiling and array coiling. The toroidal coiling is carried out in a manner such that the wire is coiled without any intersecting turns in one direction for the formation of the winding as it is coiled rotating spirally. By this coiling method, the accuracy of the position of the winding in the direction tangent to the surface of the stator core can be improved. The array coiling is carried out in a manner such that the winding is formed in layers that are stacked on one another. By this coiling method, the accuracy of the position of the winding in the direction normal to the surface of the stator core can be improved. Thus, the overall thickness of the winding can be made uniform.

Abstract: An oscillating device is fixed to the lower end of a column of a profiling electrical discharge machining apparatus, and an electrode holder for holding a tool electrode is attached to the oscillating device. The oscillating device is composed of a block formed of a material with suitable elasticity and right- and left-hand piezoelectric elements embedded under a pilot pressure in the block. By alternately driving these piezoelectric elements, the tool electrode is subjected to a motion such that a displacement much smaller than the size of a gap between the tool electrode and a workpiece is repeated during a machining operation with a short period in a predetermined direction and a direction substantially opposite thereto.

Abstract: An electric discharge machining apparatus generates an electric discharge by applying a voltage across a tool electrode and a workpiece. Axial movement amounts for controlling the tool electrode are first input into a plurality of corresponding position loop control sections and speed loop control sections to thereby control corresponding servomechanisms. An electric discharge machining condition corresponding to a gap between the tool and the workpiece is then detected by a gap condition detector. To maintain an appropriate electric discharge machining condition, a detected value and a target value of the tool are subtracted to produce a deviation value. The deviation value is then multiplied by axial components of a direction vector to produce retraction speed commands. Integrators integrate the retraction speed commands to produce correction movement amounts which are then added to the axial movement amounts and input into corresponding position loop control sections.

Abstract: An electric discharge machine designed to prevent an impactive high-speed motion generated upon actuation of an electrode actuator from propagating to a quill, as well as to enable the rapid retreat of a tool electrode by the electrode actuator to be performed efficiently. The tool electrode is attached to a quill through an elastic supporting element and a piezoelectric actuator, with the elastic supporting element disposed on the side of the quill. The elastic supporting element has an elasticity whose degree is set so as not to adversely affect normal positioning of the tool electrode, and the piezoelectric actuator facilitates rapid retreat of the tool electrode. A support body includes a counter weight having a weight large enough to absorb the component of the impactive high-speed motion of the electrode actuator which acts toward the quill.

Abstract: A magnetic recording medium is disclosed which comprises a non-magnetic support and a magnetic layer comprising a ferromagnetic powder having a specific surface area of not less than 55 m.sup.2 /g and at least two kinds of resins each containing repetitive units having a polar group selected from the group consisting of a --SO.sub.3 M group, a --OSO.sub.3 M group, a --COOM group and a --PO(OM').sub.2 group, wherein M is a hydrogen atom or an alkali metal atom, and M' is a hydrogen atom, an alkali metal atom or an alkyl group, and the glass transition points of said two resins are different not less than 60.degree. C. from each other. The recording medium is improved in the dispersibility of the ferromagnetic powder in the magnetic layer and has a satisfactory surface smoothness, high electromagnetic conversion characteristics and a satisfactory running durability.

Abstract: A magnetic recording medium is disclosed which has a magnetic layer comprising a ferromagnetic powder and a specific polyurethane resin as a binder. The polyurethane resin has a weight average molecular weight of not more than 30,000, a glass transition point of not higher than 0.degree. C. and a -SO.sub.3 M group, wherein M is a hydrogen atom or an alkali metal atom, in an amount of not less than 0.35% by weight in terms of sulfur atom. The recording medium is excellent in the dispersibility of the magnetic powder in the binder and has high running stability.

Abstract: There is disclosed the method of preparing a magnetic recording medium having an improved running durability and the excellent electromagnetic conversion characteristics, wherein the magnetic paint for a magnetic layer is prepared by the steps of:kneading the ferromagnetic powder of 100 parts by weight, the first binder of 3 to 15 parts by weight, and a solvent of 10 to 60 parts by weight under a load of a power consumption of 0.05 to 0.5 KW per kg of the ferromagnetic powder to prepare a mixture thereof;kneading the second binder and the mixture under the load of the same power consumption to prepare a coating solution.

Abstract: An electrophotographic photoreceptor containing titanyl phthalocyanine that has a maximum intensity peak of the Bragg angle 2.theta. at 27.3.degree..+-.0.2.degree. with respect to characteristic X-rays of Cu K.alpha. at a wavelength of 1.541.ANG. and which has a maximum intensity peak of 6.8.degree..+-.0.2.degree. in the 2.theta. range of 6.degree.-8.degree. is disclosed.

Abstract: The present invention relates to an electrophotographic photoreceptor containing titanyl phthalocyanine in a crystalline state that has a maximum intensity peak of the Bragg angle 2.theta. at 27.2.degree..+-.0.2.degree. crystal planes corresponding to diffraction lines at 9.6.degree..+-.0.2.degree., 11.7.degree..+-.0.2.degree. and 24.2.degree..+-.0.2.degree. in a diffraction spectrum obtained with characteristic X-rays of Cu K.alpha. at a wavelength of 1.541 .ANG., and that also has an aggregated state such that a visible and near infrared absorption spectrum has a maximum absorption in the range of 780-860 nm, said photoreceptor further containing an ethylene copolymer resin and/or a polyamide resin in an intermediate layer provided between a light-sensitive layer and an electroconductive layer or an electroconductive substrate.

Abstract: Process for preparing 2-alkyl-5-haloacetylbenzenesulfonamide represented by the general formula (1), ##STR1## (wherein R.sup.1 is an alkyl group having 1 to 5 carbon atoms; and X is a chlorine atom, bromine atom or iodine atom), characterized by halogenating a 5-acetyl-2-alkylbenzenesulfonamide represented by the general formula (2), ##STR2## (wherein R.sup.1 is the same as defined above) in a lower alcohol represented by the general formula (3),R.sup.4 --OH(wherein R.sup.4 is an alkyl group having 1 to 5 carbon atoms).

Abstract: Process for preparing 2-alkyl-5-haloacetylbenzenesulfonamide represented by the general formula (1), ##STR1## (wherein R.sup.1 is an alkyl group having 1 to 5 carbon atoms; and X is a chlorine atom, bromine atom or iodine atom), characterized by halogenating a 5-acetyl-2-alkylbenzenesulfonamide represented by the general formula (2), ##STR2## (wherein R.sup.1 is the same as defined above) in a lower alcohol represented by the general formula (3),R.sup.4 --OH(wherein R.sup.4 is an alkyl group having 1 to 5 carbon atoms).

Abstract: Disclosed is a photoreceptor for electrophotography comprising a conductive support and a subbing layer thereon made of a hydroxystyrene polymer or copolymer. A photosensitive layer is formed on the subbing layer and may comprise a carrier generator layer and transport layer. Optionally, a surface protective layer may be present.

Abstract: An electrophotographic photosensitive member having a photesensitive layer containing an azo compound represented by the following Formula [I],Formula [I] ##STR1## wherein Y.sub.1, Y.sub.2, Y.sub.3 and Y.sub.4 each is a hydrogen atom, an alkyl group, an alkoxy group or a halogen atom; A.sub.1 and A.sub.2 each represents ##STR2## wherein Z is a group of atoms necessary to complete a substituted or unsubstituted aromatic carbocyclic ring of a substituted or unsubstituted aromatic heterocyclic ring; Q.sub.3 is substituted or unsubstituted carbamoyl group or a substituted or unsubstituted sulfamoyl group; R.sub.1 is a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted amino group, a substituted or unsubstituted carbamoyl group, a carboxyl group, a carboxyl group or ester group thereof, or a cyano group; A' is a substituted or unsubstituted aryl group; and R.sub.2 and R.sub.

Abstract: A photoreceptor is disclosed which comprises a photosensitive layer and an electrically conductive support. Said photosensitive layer contains a carrier generation material and a carrier transport material, said carrier generation material being a trisazo compound of the present invention, or said photosensitive layer may consist of a carrier generation layer containing said trisazo compound and a carrier transport layer containing said carrier transport material with or without an intermediate layer being provided between said support and said photosensitive layer.

Abstract: Photoreceptor for electrophotography comprising a conductive support and an overlaying photosensitive layer thereon, said photosensitive layer containing at least one azo compound of Formula I or II ##STR1## wherein Ar.sub.1, Ar.sub.2, Ar.sub.3 and Ar.sub.4 each is an aromatic hydrocarbon ring radical or an aromatic heterocyclic ring radical; R.sub.1, R.sub.2, R.sub.3 and R.sub.4 each is an electron attractive group or hydrogen provided that at least one of R.sub.1, R.sub.2, R.sub.3 and R.sub.4 is an electron attractive group; and A is ##STR2## wherein X is a hydroxy group or a group represented by the formula: ##STR3## wherein R.sub.6 and R.sub.7 each is hydrogen or an alkyl group, and R.sub.8 is an alkyl or aryl group; Y is halogen, an alkyl or alkoxy group, a carboxy group, a sulfo group, a carbamoyl or sulfamoyl group; Z is an atomic group necessary for making an aromatic hydrocarbon ring or an aromatic heterocyclic ring; R.sub.