摘要:
A thrust bearing adapted to be rotated reversibly in the normal and opposite directions comprises two flat disc elements disposed in face-to-face contact, one of the elements being provided with spiral grooves on its opposite side surfaces, one of which is reverse to the other with respect to the spiral directions, both elements having a dent formed centrally on their opposing surfaces, respectively, to form a small space in combination in which a core member of sphere is installed with a small clearance between the surfaces of the small space and the core member.
摘要:
A method for obtaining a composite color picture out of a plurality of original pictures and a camera employing the method are disclosed, wherein a plurality of original color picture are selectively exposed on a sheet of film one by one in a sequential manner with appropriate color compensation, magnification or reduction in size, and proper masking conducted upon each exposure. Both photographic film on which to duplicate composite picture and the original pictures are displaced across and on the optical center line of a camera in such a manner that, on the composite photographic picture thus obtained, the original pictures are laid out according to a plan.
摘要:
An automatic masking device for use in a printer, wherein a reproduction picture to be projected onto a photosensitive film sheet mounted on a holder is masked by a pair of masking plates which are separated at a certain distance away from the surface of the photosensitive film sheet, and are adapted to be movable over the surface of the film sheet so as to open and close the opening distance between the masking plates, and wherein the opening distance between the masking plates is settled by moving the masking plates depending on an magnification and a size of the reproduction picture.
摘要:
The present invention provides a thermoplastic polymer composition containing a particular phenol compound or organic phosphorous compound, glucose and a thermoplastic polymer, as well as a processing stabilizer containing a particular phenol compound or organic phosphorous compound and glucose. A combined use of a particular phenol compound or organic phosphorous compound and glucose can improve processing stability of a thermoplastic polymer composition.
摘要:
A granular composition comprising an organic compound having a melting point of 30 to 100° C., and a compound represented by the formula (1): wherein R1 and R2 independently represent a hydrogen atom, a C1-8 alkyl group, or a C5-8 cycloalkyl group, R3 represents a hydrogen atom or a C1-8 alkyl group, and X represents a single bond, a sulfur atom, an oxygen atom, a C1-8 alkylidene group or a C5-8 cycloalkylidene group.
摘要:
A resin composition having excellent dispersibility, discoloration resistance and antimicrobial properties by blending a resin (A) with an antimicrobial agent (B) in which at least one kind of metal ion selected from the group consisting of silver, copper, zinc and tin is supported on zeolite, and an antimicrobial agent (C) that includes a silver ion-containing phosphate as an active ingredient, or an antimicrobial agent (D) made of a soluble glass powder containing silver ion.
摘要:
The present invention provides a process for producing an alkanediol derivative represented by the general formula (II) from an ester compound represented by the general formula (I), safely without giving rise to racemization. The present invention lies in a process for producing an alcohol derivative represented by the following general formula (II): (wherein R2 and R3 are each independently a hydrogen atom or an alkyl group having 1 to 4 carbon atoms; X is a hydrogen atom or a protecting group for hydroxyl group; and n is 0 or 1), which process comprises reducing an ester compound represented by the following general formula (I): (wherein R1 is an alkyl group having 1 to 4 carbon atoms; and R2, R3, X and n have the same definitions as given above) with sodium borohydride in a mixed solvent of at least one kind of solvent selected from the group consisting of aromatic hydrocarbons, aliphatic hydrocarbons and alicyclic hydrocarbons and a primary alcohol.
摘要翻译:本发明提供由通式(I)表示的酯化合物制备由通式(II)表示的链烷二醇衍生物的方法,其安全而不引起外消旋化。本发明在于制备醇 由以下通式(II)表示的衍生物:(其中R 2和R 3各自独立地为氢原子或具有1至4个碳原子的烷基; X为氢原子或羟基保护基 基团; n为0或1),该方法包括还原由以下通式(I)表示的酯化合物:(其中R 1是具有1至4个碳原子的烷基; R 2, R 3,X和n具有与上述相同的定义)与硼氢化钠在选自芳烃,脂族烃和脂环族烃中的至少一种溶剂和伯醇的混合溶剂中。
摘要:
A seal or bearing comprising a combination of a movable member and a stationary member, either one of the movable and stationary members being made of a low thermal expansion coefficient material, and the other being made of a carbon containing material, wherein a sliding surface of the movable or stationary member which is made of the low thermal expansion coefficient material is irradiated with an ion beam consisting essentially of nitrogen ions at the same time as titanium is vacuum-deposited on the sliding surface, thereby forming a thin titanium nitride film on the sliding surface, which provide a seal or bearing which has a reduced coefficient of friction, and which is improved in wear resistance.
摘要:
A noncontacting face seal has a stationary sealing ring and a rotating sealing ring with opposed radially extending sealing surfaces for restricting a fluid flow from a high pressure fluid side to a low pressure fluid side. The rotating sealing ring is moved out of contact with the stationary sealing ring due to hydrostatic force from the fluid. The noncontacting face seal comprises spiral grooves formed in one of the sealing surfaces and extending from a low pressure fluid side to a high pressure fluid side in a radial direction so as to pump fluid from the low pressure fluid side towards the high pressure fluid side, and a spaced portion formed in one of the sealing surfaces and extending inwardly from one circumference of the sealing surface at the high pressure fluid side so as to introduce fluid in the high pressure fluid side between the sealing surfaces.