Abstract: The invention provides a process for production of powder of perovskite compound which comprises: the first step for obtaining an aggregate of perovskite compound which comprises at least one A group element selected from the group consisting of Mg, Ca, Sr, Ba and Pb and at least one B group element selected from the group consisting of Ti, Zr, Hf and Sn, and which is represented by the general formula ABO3 wherein A is at least one A group element and B is at least one B group element; and the second step for heating the aggregate of perovskite compound obtained in the first step in a solvent at a temperature in a range from 30° C. to 500° C. whereby disintegrating the aggregate.

Abstract: The invention provides a process for production of a composition comprising a perovskite structure compound, the process comprising: a first process to heat a hydrous oxide of at least one B group element selected from the group consisting of Ti, Zr, Hf, and Sn at a temperature within a range of 80 to 300° C. in the presence of an aqueous medium so as to dehydrate the hydrous oxide; and a second process to heat a reaction product obtained in the first process and a hydroxide of at least one A group element selected from the group consisting of Ba, Sr, Ca, Mg and Pb at a temperature within a range of 100 to 300° C. in the presence of an aqueous medium. The process provides a composition comprising an ABO3 compound in the form of uniform and fine spherical particles which have an average particle diameter of 1 ?m or less, preferably within a range of 0.01 to 0.5 ?m, high crystallinity, and a controlled A/B ratio as desired, as well as few internal pores in the crystalline particles.

Abstract: An electric motor 1 and a worm gear 11 were housed in a case, an output shaft 2 of the electric motor 1 and a fitting hole 11C of the worm gear 11 were fitted so as to be capable of freely transmitting torque and of freely moving relatively in a direction of an axis X, and a tip of the output shaft 2 and an inner end of the fitting hole 11C set a gap D of separation in the direction of the axis X. Furthermore, a support section 30 making contact with an end section of a shaft section 11A of the worm gear 11 at the side of the electric motor 1 thereof was provided inside the case, and a thrust force resulting from dynamic inertia of the wheel gear 11 upon stopping of the electric motor 1 and acting on the worm gear 11 was borne by the support section 30.

Abstract: This invention provides an automotive door lock device capable of securely preventing a dropout of an operation connecting portion of an operation device from an operating lever connecting portion of an operating lever member. The automotive door lock device includes a housing having a housing body including an opening portion and a cover portion formed integrally with the housing body for opening and closing the opening portion. An operating lever member is placed in the housing and has an operating lever connecting portion. The operation device has an operation connecting portion to be connected to the operating lever connecting portion. The cover portion of the housing has a projecting portion for preventing a dropout of the operation connecting portion of the operation device.

Abstract: A door lock apparatus includes: a link member interposed between a latch mechanism and an open lever and selectively operated between an unlock position and a lock position, the unlock position in which an operation of the open lever is transmitted to the latch mechanism, and the lock position in which the operation is not transmitted to the latch mechanism; and a lock operation lever including an active lever and a sub lever, the sub lever configured to operate integrally with the active lever when the link member is switched to the lock position and to cooperate with the active lever via a biasing member when the link member is switched to the unlock position. The lock operation lever is an assembly containing the active lever, the sub lever and the biasing member.

Abstract: An electric motor 1 and a worm gear 11 were housed in a case, an output shaft 2 of the electric motor 1 and a fitting hole 11C of the worm gear 11 were fitted so as to be capable of freely transmitting torque and of freely moving relatively in a direction of an axis X, and a tip of the output shaft 2 and an inner end of the fitting hole 11C set a gap D of separation in the direction of the axis X. Furthermore, a support section 30 making contact with an end section of a shaft section 11A of the worm gear 11 at the side of the electric motor 1 thereof was provided inside the case, and a thrust force resulting from dynamic inertia of the wheel gear 11 upon stopping of the electric motor 1 and acting on the worm gear 11 was borne by the support section 30.

Abstract: This invention provides an automotive door lock device capable of securely preventing a dropout of an operation connecting portion of operation means from an operating lever connecting portion of an operating lever member. In an automotive door lock device comprising a housing 10 having a housing body including an opening portion 13, and a cover portion 122b formed integrally with the housing body 12 for opening and closing the opening portion 13; an operating lever member 21 placed in the housing 10 and having an operating lever connecting portion 21c; and operation means 52 having an operation connecting portion 52a to be connected to the operating lever connecting portion 21c, the automotive door lock device of the present invention is characterized in that the cover portion 122b of the housing has a projecting portion 122c for preventing a dropout of the operation connecting portion 52a of the operation means 52.

Abstract: The invention provides a process for production of a composition comprising a perovskite structure compound, the process comprising: a first process to heat a hydrous oxide of at least one B group element selected from the group consisting of Ti, Zr, Hf, and Sn at a temperature within a range of 80 to 300° C. in the presence of an aqueous medium so as to dehydrate the hydrous oxide; and a second process to heat a reaction product obtained in the first process and a hydroxide of at least one A group element selected from the group consisting of Ba, Sr, Ca, Mg and Pb at a temperature within a range of 100 to 300° C. in the presence of an aqueous medium. The process provides a composition comprising an ABO3 compound in the form of uniform and fine spherical particles which have an average particle diameter of 1 ?m or less, preferably within a range of 0.01 to 0.5 ?m, high crystallinity, and a controlled A/B ratio as desired, as well as few internal pores in the crystalline particles.

Abstract: The invention provides a process for production of powder of perovskite compound which comprises: the first step for obtaining an aggregate of perovskite compound which comprises at least one A group element selected from the group consisting of Mg, Ca, Sr, Ba and Pb and at least one B group element selected from the group consisting of Ti, Zr, Hf and Sn, and which is represented by the general formula ABO3 wherein A is at least one A group element and B is at least one B group element; and the second step for heating the aggregate of perovskite compound obtained in the first step in a solvent at a temperature in a range from 30° C. to 500° C. whereby disintegrating the aggregate.

Abstract: A door lock apparatus includes: a link member interposed between a latch mechanism and an open lever and selectively operated between an unlock position and a lock position, the unlock position in which an operation of the open lever is transmitted to the latch mechanism, and the lock position in which the operation is not transmitted to the latch mechanism; and a lock operation lever including an active lever and a sub lever, the sub lever configured to operate integrally with the active lever when the link member is switched to the lock position and to cooperate with the active lever via a biasing member when the link member is switched to the unlock position. The lock operation lever is an assembly containing the active lever, the sub lever and the biasing member.

Abstract: A composition for producing ceramic dielectrics which comprises: a mixture of barium titanate which has average particle size of 0.1-1.5 .mu.m is amounts of 98-60 mole % and a perovskite type barium titanate solid solution which has average particle size of 0.1-1.5 .mu.m and a Curie temperature of 50.degree.-115.degree. C. in amounts of 2-40 mole %; and(A) at least one of niobium oxides and tantalum oxides in amounts of 0.3-2 moles % in relation to 100 mole % of the mixture; and(B) at least one of cobalt oxides, nickel oxides, magnesium oxides, manganese oxides, copper oxides and oxides of a rare earth metal in amounts of 0.1-2 moles % in relation to 100 mole % of the mixture.The composition provides a ceramic dielectric which has a large relative permittivity and still has a small temperature dependence of relative permittivity within .+-.15% over a temperature range between -55.degree. C. and +125.degree. C. taking a relative permittivity at 20.degree. C. as a standard.

Abstract: A process for producing a composition which includes a perovskite compound, the process comprising:(a) subjecting a mixture of a hydroxide of at least one A group element selected from the group consisting of Mg, Ca, Sr, Ba, Pb and rare earth elements and a hydroxide of at least one B group element selected from the group consisting of Ti, Zr, Hf and Sn, to the hydrothermal reaction in an aqueous reaction medium;(b) adding an insolubilizing agent to the resultant reaction mixture to insolubilize water-soluble compounds of the unreacted A group element dissolved in the aqueous medium so as to adjust the ratio of the group A element to the group B element in a resulting composition to a desired A/B ratio; or(c) filtering, washing with water and drying the resultant reaction mixture to provide a solid reaction product, dispersing the reaction product in an aqueous medium to form a slurry, adding to the slurry a water-soluble compound of the A group element, and then adding to the slurry an insolubilizing agent t