Abstract: A process for the preparation of an N-substituted unsaturated carboxylic acid amide represented by the following formula: ##STR1## wherein R.sup.1 means a hydrogen atom or methyl group Y denotes a methylene group, oxygen atom or methylimino group, m and n stand individually for an integer of 0 to 5, and m+n is an integer of 3 to 5. The process comprises reacting a specified .beta.-alkoxy-substituted carboxylate with a specified cyclic amine to form a .beta.-alkoxy-substituted carboxylic acid amide compound and then removing an alcohol from the carboxylic acid amide compound in the presence of a basic catalyst to form an unsaturated group.

Abstract: A method of and an apparatus for molding a belt for transmitting power, comprise mounting a cylindrical unvulcanized rubber sheet on a mandrel, selecting a necessary mandrel of a plurality of mandrels on which unvulcanized rubber sheets are mounted, moving the mandrel to a cord layer forming unit, winding a cord on the cylindrical unvulcanized rubber sheet mounted on the mandrel, moving the cord wound mandrel to a laminated body forming and cutting unit, winding an unvulcanized rubber sheet on the cord wound mandrel to form a laminated body, cutting the laminated body, moving the cut laminated body to an unvulcanized rubber sheet mounting unit, and taking out the belt.

Abstract: A method of and an apparatus for molding a belt for transmitting power, comprise mounting a cylindrical unvulcanized rubber sheet on a mandrel, selecting a necessary mandrel of a plurality of mandrels on which unvulcanized rubber sheets are mounted, moving the mandrel to a cord layer forming unit, winding a cord on the cylindrical unvulcanized rubber sheet mounted on the mandrel, moving the cord wound mandrel to a laminated body forming and cutting unit, winding an unvulcanized rubber sheet on the cord wound mandrel to form a laminated body, cutting the laminated body, moving the cut laminated body to an unvulcanized rubber sheet mounting unit, and taking out the belt.

Abstract: A cutting device for use in cutting a cylindrical material around a mandrel into annular bodies of the desired width. This device has a first moving table to move in the axial direction of the mandrel, a second moving table to move on the first moving table in the radial direction of the mandrel, a cutter support carrying a first cutter adjustable in position in the radial direction of the mandrel and/or a second cutter adjustable in the axial direction of the mandrel, and a control unit with a device for detecting the position of each moving table, a device for receiving output signals from the detecting device and comparing the position with position data set beforehand and a driving circuit to move each moving table according to output signals from the comparing device.

Abstract: A video signal recording apparatus of reduced size for portability combines a video camera and helical scan video tape recorder in a single unit, in which the reduced size is obtained in part by having a tape guide drum of reduced diameter, which requires a tape wrap angle greater than the conventional 180.degree. and employs a pair of rotary tape heads that are arranged close together relative to the diametrically opposed conventional head arrangement. The timing of the heads in recording the fields of the video signals as tracks is controlled by a vertical synchronization signal having pulses that are delayed to account for the finite distance between the two rotary heads. The vertical sync signal then has a different time period for a first field than it does for a second field of one frame of the video signal. The camera has an image pickup portion that is caused to be scanned by the same synchronization signals utilized in the recording operation.

Abstract: Substituted propargyloxyacetonitrile derivative represented by the general formula (I) ##STR1## wherein R represents a hydrogen atom, a halogen atom, a lower alkyl group, a lower haloalkyl group, a lower alkoxy group, a methylenedioxy group, a nitro group or a cyano group, n represents an integer of 1 to 5 and when n is an integer of 2 or more, R's may be identical or different, R.sup.1 represents a hydrogen atom or a lower alkyl group, and R.sup.2 represents a hydrogen atom, a lower alkyl group, a lower haloalkyl group or a halogen atom, provided that R.sup.1 and R.sup.2 are not simultaneously hydrogen atoms.The compounds have herbicidal and fungicidal activities.

Abstract: Triurea grease compositions having excellent oil separation, shear stability, oxidation stability and structural stability of a thickening agent at a high temperature, which contains a triurea compound ##STR1## wherein R.sub.1 is a monovalent aliphatic hydrocarbon radical having 12-24 carbon atoms, R.sub.2 is a divalent triazine derivative radical, R.sub.3 is a divalent aromatic hydrocarbon radical having 6-15 carbon atoms or the derivative radical thereof, and R.sub.4 is at least one of monovalent aliphatic hydrocarbon radicals having 2-24 carbon atoms, derivative radicals thereof, monovalent aromatic hydrocarbon radicals having 6-10 carbon atoms and derivative radicals thereof, as a thickening agent in a usual lubricating base oil.

Abstract: A miniature helical scan video tape recorder (VTR) utilizes a reduced-diameter guide drum, but the video signals recorded thereby onto the tape have a standard track pattern and can be reproduced using a standard VTR having a guide drum of standard diameter D.sub.1. In the miniature VTR, the tape is wrapped for a tape wrap angle .alpha. (e.g., substantially 300 degrees) at a still angle .theta..sub.2, whereas the standard VTR uses a wrap angle of 180.degree. and a still angle of .theta..sub.1. In order to ensure that the miniature VTR achieves the same record track length l'.sub.N and recording angle .theta..sub.0 as the standard VTR, the diameter D.sub.2 of the miniature VTR is selected to satisfy the equation ##EQU1## where f.sub.V is the video field frequency. The still angle .theta..sub.2 satisfies the equation ##EQU2## the video signal to be recorded is given a non-standard horizontal scanning frequency f'.sub.H according to the relation ##EQU3## where f.sub.

Abstract: A polymethylene polyphenyl polyisocyanate composition comprising polymethylene polyphenyl polyisocyanates, a part of the isocyanate groups contained therein being substituted by a carbamate group, or said polymethylene polyphenyl polyisocyanates having the substituted carbamate group and polymethylene polyphenyl polyisocyanate not having carbamate group. The total amount of the carbamate groups contained in the composition is up to 10 percent by mole based on the total amount of isocyanate groups contained in the composition. The composition is useful for the preparation of rigid polyurethane which has many industrial applications. A process for the preparation of the composition is also disclosed.

Abstract: An intake air throttle valve control system for a diesel engine which greatly reduces vibration and noise and rough engine running at idling speeds. A throttle valve is provided in an intake passage in series with the intake air manifold of the engine with the valve operated by a negative pressure responsive actuator. The negative pressure responsive actuator is coupled to a source of negative pressure through a series-connected arrangement of a water temperature sensing valve, a vacuum cut-off valve and a negative pressure control valve. The water temperature sensing valve operates to connect or disconnect the source of negative pressure to the actuator in response to the temperature of the engine coolant. The vacuum cut-off valve vents the connections to the actuator to the atmosphere in response to an engine operating parameter such as the exhaust manifold pressure, the pressure in an oil line of the engine, or an output voltage of a generator which varies in response to the engine speed.

Abstract: An arc extinguishing chamber confined by a cylindrical housing of stainless steel, and an insulating chamber within a hollow cylindrical insulator, communicate with each other and are maintained in a vacuum with two contacts formed of an electrically conductive material having lower melting and boiling points than copper disposed in the arc extinguishing chamber. A pair of apertured shield plates disposed respectively at each end of the housing and another pair of shield plates mounted respectively on each contact rod are formed of stainless steel. The housing and the shield plates prevent the extinguishing and insulating chambers from overheating during exhaustion at a high temerature and also from being contaminated in operation due to the vaporization of the contacts. Two heating devices are used to heat the housing to a higher temperature than the insulating chamber during the exhausting operation.

Abstract: A process for preparing polymethylene polyphenyl polyisocyanates, in which N-phenyl carbamic acid esters are subjected to a condensation reaction with formaldehyde, and the reaction product containing polymethylene polyphenyl polycarbamic acid esters and unreacted N-phenyl carbamic acid esters is thermally decomposed to obtain polymethylene polyphenyl polyisocyanates.