Abstract: A method for bonding valve seats for intake and exhaust valves to an engine cylinder head. Valve seats are brazed to an aluminum cylinder head using an Al--Zn type brazing material and a fluoride type flux. The brazing material contains 70 to 90 % by weight of Zn. The brazing is preferably carried out at a temperature of 470.degree. to 520.degree. C. To allow the brazing material and flux to be present between the cylinder head and each valve seat, the cylinder head contains U-grooves formed around the opening of each intake or exhaust port. The U-groove consists of an annular step formed along the opening of the intake or exhaust port and a bank extended along the inner circumference of the step. The valve seats are placed in the U-grooves, which are then filled with the brazing material and flux, to carry out brazing of the valve seats onto the cylinder head. After completion of the brazing, the banks are removed to complete bonding of the valve seats to the cylinder head.

Abstract: A brightening chemical polishing solution for a hardened steel article (e.g., a carburized and quenched gear) comprises hydrofluoric acid having a molar concentration of from 0.2 to 2 mol/l, hydrogen peroxide having a molar concentration of from 0.4 to 4 mol/l, and water, a molar ratio of the hydrofluoric acid to the hydrogen peroxide being from 1:1.5 to 1:2.8. The steel article is quench hardened and is chemically polished in the solution. A shot-peening is additionally performed, prior to the polishing.

Abstract: A brightening chemical polishing solution for a hardened steel article (e.g., a carburized and quenched gear) comprises hydrofluoric acid having a molar concentration of from 0.2 to 2 mol/l, hydrogen peroxide having a molar concentration of from 0.4 to 4 mol/l, and water, a molar ratio of the hydrofluoric acid to the hydrogen peroxide being from 1:1.5 to 1:2.8. The steel article is quench hardened and is chemically polished in the solution. A shot-peening is additionally performed, prior to the polishing.

Abstract: Novel polypeptide derivatives, acid-addition salts thereof and complexes thereof, having the activities for inhibiting bone calcium absorption, for lowering the blood level of calcium, as analgesics, for inhibiting secretion of the gastric juice.Pharmaceutical composition can be prepared by formulating, at least one of the novel polypeptide derivatives, acid-addition salts thereof and complexes thereof, together with a proteolytic enzyme inhibitors and/or pharmaceutically acceptable acids.The pharmaceutical composition are quite effective as agents for curing hypercalcemia, for curing Peget's disease, for curing osteoporosis, analgetic agent, anti-ulcerative agent and the like.

Abstract: A brazing flux comprises cesium fluoride, aluminum fluoride, and crystalline aluminum hydroxide or aluminum oxide or both which form a crystalline compound having the following composition and containing cesium in the form of a complex salt:x.multidot.CsF-y.multidot.AlF.sub.3 -1/2.multidot.z.multidot.[Al.sub.2 O.sub.3 .multidot.nH.sub.2 O and/or Al.sub.2 O.sub.3 ]where x+y+z=100, x/y.ltoreq.3, 42.ltoreq.x.ltoreq.66, and z.gtoreq.2in terms of mol %. The crystalline compound has a melting point of 440.degree. to 580.degree. C.The brazing flux is non-corrosive and safe to use, and well suited for a brazing aluminum materials with a high magnesium content and also for torch brazing.

Abstract: Novel synthetic polypeptide derivatives, i.e., novel calcitonin derivatives, having improved basic physiological activities of the corresponding natural calcitonins, i.e., the activity for lowering the blood level of calcium, the activity as an analgesic, as well as the activity for inhibiting the secretion of the gastric juice. Thus these synthetic calcitonins are effective as agents for curing hypercalcemia, analgetic agents, anti-ulcerative agents and the like.

Abstract: The present invention discloses a reticule device for a fire sighting scope. According to the reticule device of the present invention, it is possible to lighten brightly the entire surface of a scale facing an eyepiece by illuminating light thereto. A light source and a reflection frame are mounted at each prescribed position and further a conventional crossed scale is incorporated into the device as it stands. Furthermore, since a glass plate is not employed in the scale, dust etc. which might adhere on the scale can easily be cleaned or swept off.

Abstract: For the diagnosis of diabetes, a glucosylated protein in a sample is measured by subjecting the sample to a reducing treatment and then detecting a compound, which contains one or more reduced glucosylated lysine residual groups, in accordance with an immunoassay technique in which the reduced glucosylated lysine residual groups are used as an epitope.

Abstract: An antibody of a human leukemia virus-related peptide obtained by collecting an antibody produced in a mammal body by administering to the mammal an antigen prepared by reacting a human leukemia virus-related peptide selected from the group consisting of:(a) a peptide represented by formula (1):H-Tyr-Val-Glu-Pro-Thr-Ala-Pro-Gln-Val-Leu-H (1)(b) a peptide represented by formula (2): psR-Ile-Pro-His-Pro-Lys-Asn-Ser-Ile-Gly-Gly-Glu-Val-OH (2)wherein R is the same as defined above;(c) a peptide represented by formula (3):R-Thr-Trp-Thr-Pro-Lys-Asp-Lys-Thr-Lys-Val-Leu-OH (3)wherein R is the same as defined above;(d) a peptide represented by formula (4):H-Val-Val-Gln-Pro-Lys-Lys-Pro-Pro-Pro-Tyr-OH (4)(e) a peptide represented by formula (5):R-Met-Gly-Gln-Ile-Phe-Ser-Arg-Ser-Ala-Ser-Pro-OH (5)wherein R is the same as defined above; and(f) a peptide represented by formula (6):H-Tyr-Pro-Glu-Gly-Thr-Pro-Lys-Asp-Pro-Ile-Leu-Arg-Ser-Leu-OH (6)as a hapten, with a carrier in the presence of a haptencarrier binding agent.

Abstract: A riflescope including means for correcting the ballistic trajectory corresponding to the bullets being used. A magnification alteration ring drives a zoom lens system by a rotatable cam cylinder. An axially slidable cam member is coaxially rotatably mounted on the cam cylinder and in cammed engagement with said magnification alteration ring for effecting axial sliding thereof in accordance with the rotation of the magnification alteration ring, and the cam member is prevented from rotating during axial sliding thereof. The cam member has a plurality of sloped surfaces on the outer face thereof extending in a direction parallel to the axis of the cam member, one sloped surface for each different type of bullet to be used, and the sloped surfaces being adjacent the free end of the lens tube holding the zoom lens system. A changeover ring is rotatably mounted on the outside of the riflescope tube for stepwise rotation therearound and engaged with the cam member for effecting stepwise rotation of the cam member.

Abstract: A flux for brazing material comprising cesium fluoroaluminate or a mixture thereof with aluminum fluoride, and having an aluminum fluoride/cesium fluoride molar ratio of 67/33 to 26/74.

Abstract: A brazing flux having a composition corresponding to 0 (not inclusive) to 62 mol % of potassium fluoride, 2 to 74 (not inclusive) mol % of cesium fluoride and 26 to 67 mol % of aluminum fluoride, said flux including potassium and cesium as fluoro-aluminum-complexes and not including free cesium fluoride and potassium fluoride, thus having a melting starting point within the range of 440.degree.-580.degree. C.

Abstract: A method of brazing an aluminum material. At least a portion of the material is brought into contact with a coating solution containing cesium and fluorine ions, whereby a chemically coated flux layer composed of cesium fluoroaluminate or a mixture thereof with aluminum fluoride is formed on the surface of the material. Then, the material is heated and joined to another material with a brazing alloy.

Abstract: An antibody of a human leukemia virus-related peptide obtained by collecting an antibody produced in a mammal body by administering to the mammal an antigen prepared by reacting a human leukemia virus-related peptide represented by formula (1):R-Pro-Val-Met-His-Pro-His-Gly-Ala-Pro-OH (1)whereinR is a hydrogen atom or a group shown by formula, H-Tyr-;as a hapten, with a carrier in the presence of a hapten-carrier binding agent.

Abstract: Waterproof binoculars of the central focus wheel-type having transfer bars coupled to focussing lens groups within the body tubes, with the transfer bars being simultaneously moved longitudinally by the co-action of a groove on each bar with a flange on a screw-threadingly mounted lead ring turned by a screw-threaded shaft. Each transfer bar is water-tightly sealed in its bore.

Abstract: An antibody of a human leukemia virus-related peptide obtained by collecting an antibody produced in a mammal body by administering to the mammal an antigen prepared by reacting a human leukemia virus-related peptide selected from the group consisting of:(a) a peptide represented by formula (1):H-Tyr-Val-Glu-Pro-Thr-Ala-Pro-Gln-Val-Leu-H (1)(b) a peptide represented by formula (2):R-Ile-Pro-His-Pro-Lys-Asn-Ser-Ile-Gly-Gly-Glu-Val-OH (2)wherein R is the same as drefined above;(c) a peptide represented by formula (3):R-Thr-Trp-Thr-Pro-Lys-Asp-Lys-Thr-Lys-Val-Leu-OH (3)wherein R is the same as defined above;(d) a peptide represented by formula (4):H-Val-Val-Gln-Pro-Lys-Lys-Pro-Pro-Pro-Tyr-OH (4)(e) a peptide represented by formula (5):R-Met-Gly-Gln-Ile-Phe-Ser-Arg-Ser-Ala-Ser-Pro-OH (5)wherein R is the same as defined above; and(f) a peptide represented by formula (6):H-Tyr-Pro-Glu-Gly-Thr-Pro-Lys-Asp-Pro-Ile-Leu-Arg-Ser-Leu-OH (6)as a hapten, with a carrier in the presence of a hapten-carrier binding agent.

Abstract: A waterproof bodytube having a division in its intermediate portion to be used to insert a Porro prism into the binoculars. The construction of this invention is such that a male bodytube having a projection portion is fitted to a female bodytube by means of a packing, and a screw is tightened from its outer surface by means of a packing. For this arrangement, the head of the screw is positioned at the side surface of the bodytube, and this portion is normally covered with a film so that the exposure of the screw can be prevented.

Abstract: Human interferons related peptides and derivatives thereof, antigens, antibodies prepared therefrom, immobilized antibodies to be used for affinity chromatography, and novel method for assaying human interferons by using said affinity chromatography.

Abstract: A mechanism for longitudinally shifting a shiftable lens group in a zoom lens system, including a lever pivotally mounted in a frame having a rotatable pin on each end thereof, a terminal member mounted on the movable lens group having a groove therein extending perpendicular to the longitudinal axis of the lens system with one of the pins riding in the groove, a shift bar mounted in the frame movable only in parallel with the axis having a groove in one end thereof extending perpendicular to the axis with the other pin of the lever riding in the groove, and a rotatable mechanism in the frame for moving the shift bar longitudinally so that, upon such movement, the engagement of the pin in the groove of the bar pivots the levers so that the engagement of the other pin in the groove of the terminal member shifts the lens group longitudinally.

Abstract: A disc brake including a stationary member, a pair of friction pads at least one of which is slidably supported on the stationary member, a caliper slidably supported on the stationary member by at least one pin, a hydraulic piston provided in the caliper for pressing directly on a back plate of the one friction pad directly, and a lug formed on the back plate of the friction pad and engaging in a groove formed in the adjacent surface of the piston to prevent the rotation of the piston in the caliper. One of the side walls of the groove near the one pin is inclined such that the engagement between the lug and the groove can be released by rotating the caliper around the one pin.