摘要:
An optical system includes a front group which is fixed in position in a direction substantially perpendicular to an optical axis, and a rear group which has a positive refractive power and is movable in the direction substantially perpendicular to the optical axis. The optical system satisfies:1.45
摘要:
A photographic film cassette assembling method includes the steps of joining shell halves together by ultrasonic welding, to form a cassette shell, while accommodating a spool in the cassette shell. A film connection sheet is secured to the spool before the spool is mounted in the cassette shell. A free end of the film connection sheet is placed outside the cassette shell through a film passage mouth of the cassette shell. A strip of a photographic film is connected to the spool by attaching a trailing end of the photographic film to the free end of the film connection sheet and wound about the spool by rotating the spool. The photographic film may be directly secured to a spool having an engaging member formed therein and a film guide member formed integrally therewith. A free end or free ends of the guide member protrude slightly from the film passage mouth to the outside of the cassette shell. The trailing end of the photographic film is guided along the film guide member into the cassette shell toward the engaging member of the spool, thereby to bring the end of the photographic film into engagement with the engaging member.
摘要:
A plurality of shapes each having a fundamental construction of a flange are vacuum formed on a continuous sheet of thermoplastic resin. When blanking each of the formed shapes out of the resin sheet into an individual flange, a spool core is placed coaxially with the formed shape placed in the blanking position. The flange just blanked out of the resin sheet is moved in the blanking direction toward the spool core, to be fit on the spool core. The shapes are formed in a double line along the resin sheet, and thereafter, the resin sheet is slit along the longitudinal direction into two sheet branches each having the formed shapes arranged in a single line. The back side surfaces of the two sheet branches are opposed to each other, and the spool core is disposed between the sheet branches and oriented in a direction perpendicular to the back side surfaces of the sheet branches. The formed shapes are blanked out of the sheet branches in opposite directions toward opposite ends of the spool core.
摘要:
A curing agent for a two-component type polyurethane, containing as a main constituent a polyisocyanate derived from hexamethylene diisocyanate, the polyisocyanate having a viscosity of lower than 1,400 mP.a/25.degree. C. in substantially free from monomeric hexamethylene diisocyanate and a solvent, having a uretidine dione dimer content of more than 10%, and having an isocyanurate cyclic trimer content of less than 60%.
摘要:
A high tensile steel sheet excelling in workability and stretch flanging formability, which is of a composite texture composed of a ferrite phase and a 2nd phase selected from the group consisting of martensite, bainite, pearlite, retained austenite and cold-transformed ferrite, wherein the volume fraction of the 2nd phase is not less than about 1.3 times higher at an outer region of the steel sheet than the volume fraction of the 2nd phase in a central region of the sheet thickness.
摘要:
An internal focusing telephoto lens includes, in succession from the object side, a first lens unit of positive refractive power having at least a positive first lens component, a second lens unit having negative refractive power and movable along the optical axis for focusing, and a third lens unit having positive refractive power and having an imaging function. The first lens unit forms a substantially afocal system with the second lens unit, and is designed to satisfy the following conditions:0.43
摘要:
Benzo[5,6]cyclohepta[1,2-b]pyridine derivatives of the following formula: ##STR1## wherein R.sup.1 represents a cyano, carbamoyl, alkylsulfoxy, alkylsulfonyl, tetrazolyl or sulfonic acid group, and R.sup.2 represents a hydrogen atom, a cyano, phenyl, aralkyl, alkoxycarbonylalkyl, aminoalkylcarbamoylalkyl or lower alkyl group, or a group ##STR2## or --X--R.sub.4, X being an oxygen or sulfur atom, R.sup.3 standing for a hydrogen atom or a substituted or unsubstituted lower alkyl, phenyl or aralkyl group, and R.sup.4 being a substituted or unsubstituted lower alkyl, phenyl or aralkyl group or an aminoalkyl group, and salts thereof. Antiallergic and antihistamic agents containing one of the above derivatives or salts as an active ingredient are also described.
摘要:
A device for detecting an electrical abnormality in an electrical device filled with insulating gas. A surface on a light reflecting prism placed within the electrical device carries a color indicator material. The color indicator material changes color when acidic gas is present. This gas is formed when an electrical abnormality such as a short circuit occurs in the presence of the insulator gas. A light source provides light to the prism which reflects light back having a color which varies according to the color of the color indicator material. The color of the reflected light is analyzed to determine if an electrical abnormality is present.
摘要:
A thermoplastic polyurethane resin is prepared by the reaction of(A) p-phenylene diisocyanate,(B) a hydroxyl terminated poly(hexamethylene carbonate) polyol having a molecular weight of 850 to 5000 and(C) a short chain polyol having 2 to 10 carbon atoms as the chain extending agent,the molar ratio of (B) : (C) being 1:2 to 1:0.05, and the molar ratio of isocyanate groups : total active hydrogen groups being 0.93:1 to 1.20:1.
摘要:
An expectorant comprising a hydroxyalkylcysteine derivative of the following formula (I) is disclosed. ##STR1## wherein n represents an integer of 1 to 4. The expectorant is stabile, has little side effects and toxicity, and exhibits an excellent expectorant effect.