Abstract: Disclosed is an electrophotographic photoreceptor which is high in sensitivity and endurance and which comprises an electroconductive support and, provided thereon, a photosensitive layer which contains a hydrozone compound represented by the following formula [I], [II], or [III]: ##STR1## wherein the various subgroups designated by R or A are as described in the specification.

Abstract: This invention provides an electrophotographic photoreceptor which is high in durability and high in sensitivity. This photoreceptor comprises an electroconductive support and, provided thereon, a photosensitive layer containing an azo pigment represented by the following formula [I] or [II]: ##STR1## wherein A represents a hydrogen atom, an alkyl group, a phenyl group or a heterocyclic ring group, m and n each represents 0 or 1, X represents a hydrogen atom, a lower alkyl group, a cyano group or a halogen atom and Cp represents a coupler residue, or ##STR2## wherein Z represents an alkyl group, a phenyl group or a heterocyclic ring group, X represents a hydrogen atom, a lower alkyl group, a cyano group or a halogen atom and Cp represents a coupler residue.

Abstract: Disclosed is an electrophotographic photoreceptor which is high is sensitivity and high in endurance and which contains in photosensitive layer a novel stilbene compound represented by the following formulas [I], [II], or [III]: ##STR1##

Abstract: The present invention provides an electrophotographic photoreceptor which comprises an electroconductive support and, provided thereon, a photosensitive layer containing at least one hydrazone compound represented by the following formula (I): ##STR1## wherein R.sup.1 and R.sup.2 each represents an alkyl, alkenyl, aralkyl, aryl or heterocyclic group which may be substituted, and at least one of R.sup.1 and R.sup.2 is an alkenyl group and R.sup.3 and R.sup.4 each represents a hydrogen atom, an alkyl group, an alkoxy group or a halogen atom.

Abstract: There is provided a seal device for a face protector such as respirators used in a state fitted closely to a user's face which includes a seal member formed by using the user's face as a mold, an airtight elastic member provided between the seal member and the face portector and an airtight elastic member secured to the surface of the seal member on the side of the user's face. There is also provided a face protector having this seal device mounted on a face protector main body which is worn by a user in a state fitted to the user's face.

Abstract: This invention provides an electrophotographic photoreceptor which is high in durability and high in sensitivity. This photoreceptor comprises an electroconductive support and, provided thereon, a photosensitive layer containing an azo pigment represented by the following formula [I] or [II]: ##STR1## wherein A represents a hydrogen atom, an alkyl group, a phenyl group or a heterocyclic ring group, m and n each represents 0 or 1, X represents a hydrogen atom, a lower alkyl group, a cyano group or a halogen atom and Cp represents a coupler residue, or ##STR2## wherein Z represents an alkyl group, a phenyl group or a heterocyclic ring group, X represents a hydrogen atom, a lower alkyl group, a cyano group or a halogen atom and Cp represents a coupler residue.

Abstract: A bicycle ergometer includes an eddy current brake having a rotor assembly including an iron material having a carbon content of 0.12% or less and a silcon content of 0.35% or less, a stator provided in the rotor assembly, a plurality of exciting coils provided on the stator, and a power source for energizing the exciting coils. The ergometer includes an input panel for inputting physical attributes of the user, e.g., age and sex, a pulse sensor for measuring the heart rate of the user at rest and during exercise on the ergometer, an arithmetic control circuit for calculating a training program and heart rate range and for controlling the eddy current brake to present a load to the user which will maintain the user's heart rate in a predetermined range. The method of using the ergometer enables a user to select a physical strength program and a weight reduction program with the selected program reflecting the age, sex, and the present physical condition of the user.

Abstract: A bicycle ergometer includes an eddy current brake having a flywheel rotor assembly including an inner part of iron material having a carbon content of 0.12% or less and a silicon content of 0.35% or less, a stator provided inside the rotor assembly, a plurality of exciting coils provided on the stator, and a power source for energizing the exciting coils. The outer part of the flywheel rotor can be made of concrete. The ergometer includes an input panel for inputting physical attributes of the user, e.g., age and sex, a pulse sensor for measuring the heart rate of the user at rest and during exercise on the ergometer, an arithmetic control circuit for calculating a training program and heart rate range and for controlling the eddy current brake to present a load to the user which will maintain the user's heart rate in a predetermined range.

Abstract: An electrophotographic photoreceptor excellent in properties after repeated use and durability is provided by containing a bis-azo pigment represented by the following general formula [I] or [II] in the light-sensitive layer on the conductive support: ##STR1## wherein X represents --O--, --S--or >N--R.sub.4 wherein R.sub.4 represents a hydrogen atom, an alkyl group or an aralkyl group, R.sub.1, R.sub.2 and R.sub.3 each represent a hydrogen atom, an alkyl group, an alkoxy group, an aryl group or a group of atoms necessary to form a condensed ring by combination of two or them, Y.sub.1 and Y.sub.2 each represent a hydrogen atom, a halogen atom, an alkyl group or an alkoxy group, A represents a coupler residue necessary to produce an azo pigment and n is 0 or 1; ##STR2## wherein Y.sub.1 and Y.sub.2 each represent a hydrogen atom, a halogen atom, an alkyl group or an alkoxy group, R.sub.1 and R.sub.

Abstract: There is disclosed an electrophotographic photoreceptor comprising an electroconductive support and, provided thereon, a photosensitive layer containing (A) a trisazo pigment formed by the reaction between a coupler component represented by the following general formula (I) and a diazonium salt represented by the following general formula (II) or (B) a bisazo pigment represented by the following general formula (III): ##STR1## wherein Z is a substituted or unsubstituted hydrocarbon ring or a group of atoms necessary to complete a substituted or unsubstituted hetero ring, R is oxygen, sulfur, or --NR'--, Y is a chain hydrocarbon necessary to complete a 5- or 6-membered ring, and R' is hydrogen or an alkyl, benzyl, or aryl group which may have a substituent; ##STR2## wherein A is a trivalent moiety whose carbon atom is bonded to nitrogen atom forming azo group and X.crclbar.

Abstract: A bicycle ergometer includes an eddy current brake having a rotor assembly including an iron material having a carbon content of 0.12% or less and a silicon content of 0.35% or less, a stator provided in the rotor assembly, a plurality of exciting coils provided on the stator, and a power source for energizing the exciting coils. The ergometer includes an input panel for inputting physical attributes of the user, e.g., age and sex, a pulse sensor for measuring the heart rate of the user at rest and during exercise on the ergometer, an arithmetic control circuit for calculating a training program and heart rate range and for controlling the eddy current brake to present a load to the user which will maintain the user's heart rate in a predetermined range. The method of using the ergometer enables a user to select a physical strength program and a weight reduction program with the selected program reflecting the age, sex, and the present physical condition of the user.

Abstract: A closed-circuit type respirator includes an oxygen enriching valve provided in an exhalation system of the respirator, preferably at the lower front end of a respirator mask. This oxygen enriching valve comprises a housing having a passage communicating to the exhalation system and a passage communicating to the atmosphere, a first valve which is provided in the passage communicating to the exhalation system and opens only when pressurized for exhalation and a second valve which is provided in the passage communicating to the atmosphere and is opened for a desired period of time by an external force such as manual operation so that the space inside the housing communicates with the atmosphere.

Abstract: An electrophotographic material comprises a conductive support and a light-sensitive layer containing at least one of the azo compound of the formulas [I]-[III]:formula [I]:Cp.sub.1 --N.dbd.N--A--N.dbd.N--Cp.sub.2A represents a divalent residue which bonds through C atoms to N atoms which constitute azo and Cp.sub.1 is a group of by the formula: ##STR1## Z represents a substituted or unsubstituted carbocyclic aromatic ring, a substituted or unsubstituted heterocyclic aromatic ring or a unsaturated monocyclic hydrocarbon ring and R represents an aryl group containing one or two CF.sub.3 groups and Cp.sub.2 is a coupler residue different from said Cp.sub.1 and is selected from following formulas (a)-(f): ##STR2## Z.sup.1 and Z.sup.2 represent a substituted or unsubstituted aromatic hydrocarbon ring or substituted or unsubstituted hetero ring, R.sup.1 and R.sup.2 represent substituted or unsubstituted alkyl, aralkyl, aryl or hetero ring group, R.sup.3 represents an alkyl or carboxyl group or an ester thereof, R.

Abstract: A rhodanine derivative having the following general formula (I): ##STR1## wherein R is an acyclic alkyl group having 2 to 10 carbon atoms which may be substituted by a halogen atom or an acyclic alkenyl group having 2 to 19 carbon atoms which may be substituted by a halogen atom; or a nontoxic salt thereof. The rhodanine derivative has potent platelet aggregation inhibiting activity and aldose reductase inhibiting activity and therefore is useful as a therapeutic agent for diabetic complications.

Abstract: Disclosed is an electrophotographic photoconductive material excellent in sensitivity and durability which comprises an electroconductive substrate and, provided thereon, a photosensitive layer containing a trisazo pigment represented by the general formula ##STR1## wherein R's, which may be the same or different, represent each a hydrogen atom, halogen atom, substituted or unsubstituted alkyl group, alkoxyl group, or nitrile group; n is an integer of 1 or 2; and A represents ##STR2## wherein Z represents a group of atoms necessary to complete a substituted or unsubstituted aromatic carbon ring or a substituted or unsubstituted aromatic hetero-ring; X represents a hydrogen atom, an alkyl group, or a group of atoms necessary to complete a substituted or unsubstituted aromatic carbon ring, a substituted or unsubstituted aromatic hetero ring, or a substituted or unsubstituted hetero ring; m is 0 or 1; B represents a group of atoms necessary to complete a substituted or unsubstituted aromatic carbon ring, a subst

Abstract: Disclosed is a silver halide photographic photosensitive material which contains at least one dye analogous to a diaminotriphenylmethane dye having sulfo group but which contains, instead of the phenyl group which is not an aminophenyl group, a benzo]b]furan or benzo[b]thiophene which prevents irradiation and halation without discoloration or change during preparation of coating solution or emulsion and giving any adverse effects on photographic characteristics and which is completely and rapidly decolorized during photographic processing procedure.

Abstract: An apparatus for applying a mixture of air and vapor to the face or hair includes an evaporator comprising a closed tank partially filled with water to leave a residual space thereabove and provided with an electric heater immersed in the water for generating a steam which fills the residual space. A first downwardly sloping tube connects the an attachment, located higher than the tank and adapted to fit on the head or face to be treated, to the residual space. A upwardly sloping second tube connects the outlet of a fan positioned lower than the tank to the residual space. Both the temperature and the flow of the vapor-air mixture can be varied by changing not only the power of the electric heater but also the rotational speed of the fan.

Abstract: Photosensitive element for electrophotography which comprises(a) a photosensitive layer composed of (1) a binder resin and (2) particles of photoconductive material being dispersed in said binder resin and each particle comprising a photoconductive zinc oxide particle having been encapsulated over its surface with an encapsulating resinous material;(b) an electroconductive support for said photosensitive layer; and(c) an intermediate layer being located between said photosensitive layer and said support, and composed of a water-soluble polymer.The water-soluble polymer preferably is a casein, and a sensitizing agent preferably is adsorbed by the surface of the zinc oxide particle and or included in the encapsulating resinous layer.

Abstract: A photosensitive material for electrophotography which comprises a conductive support and two or more superimposed photosensitive layers where each layer comprises photoconductive powder and a binder, the particle size of the photoconductive powder in an upper layer being greater than that in a lower layer. Both high photosensitivity and high resistance to electrical impact are imparted to the photosensitive material.

Abstract: A photosensitive material for electrophotography which comprises a conductive support and two or more superimposed photosensitive layers where each layer comprises photoconductive power and a binder, the particle size of the photoconductive powder in an upper layer being greater than that in a lower layer. Both high photosensitivity and high resistance to electrical impact are imparted to the photosensitive material.