Abstract: An electrophotographic photosensitive member having a conductive substrate and a photosensitive layer thereon. The photosensitive layer contains a compound represented by the following formula (1): ##STR1## wherein Ar.sub.1 and Ar.sub.2 are the same or different and are each a substituted or unsubstituted bivalent carbocyclic aromatic group or a substituted or unsubstituted bivalent heterocyclic aromatic group; R.sub.1 and R.sub.2 are each a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aralkyl group or a substituted or unsubstituted aryl group; and A.sub.1 and A.sub.2 are each a coupler residue having a phenolic hydroxyl group, wherein A.sub.1 and A.sub.2 are the same or different.

Abstract: An electrophotographic photosensitive member having a photosensitive layer laminated on an electroconductive support, characterized in that the photosensitive layer contains a biphenyl compound represented by the following formula: ##STR1## (wherein R.sup.1 represents an alkyl group; R.sup.3 represents an aralkyl group; R.sup.3 and R.sup.4 each represent an aromatic ring group; Ar and Ar' each represent a divalent aromatic ring group).

Abstract: An electrophotographic photosensitive member comprises a conductive support and a photosensitive layer provided thereon. The photosensitive layer contains a fluorene compound represented by the following Formula (I): ##STR1## wherein R.sub.1 and R.sub.2 each represent an alkyl group; R.sub.3 represents a hydrogen atom, an alkyl group, an alkoxy group or a halogen atom; R.sub.4 and R.sub.5 each represent a hydrogen atom, an alkyl group, an aralkyl group or an aryl group.

Abstract: A photosensitive member for electrophotography, comprising an electroconductive substrate and a photosensitive layer disposed thereon, wherein the photosensitive layer comprises a pyrene compound represented by the following general formula (I): ##STR1## wherein Ar.sub.1 and Ar.sub.2 respectively denote and aromatic hydrocarbon group capable of having a substituent, or an aromatic heterocyclic group capable of having a substituent.

Abstract: A photosensitive member for electrophotography, including an electroconductive substrate and a photosensitive layer disposed thereon, wherein the photosensitive layer comprises a substituted amino compound represented by the following general formula (I): ##STR1## wherein X denotes --O--, --S--, or ##STR2## R.sub.1 denotes a hydrogen atom, alkyl, alkoxyl or halogen atom; and R.sub.2, R.sub.3 and R.sub.4 respectively denote an alkyl, aralkyl, aryl or heterocyclic group.

Abstract: A 5H-dibenzo [a,d] cycloheptenylidene derivative and a 5H-dibenzo [1,d] cycloheptenylidene derivative represented by the following general formula [I]: ##STR1## wherein X is --CH.sub.2 --CH.sub.2 -- or --CH.dbd.CH--; R.sub.1 and R.sub.2 are alkyl groups, aralkyl groups, aromatic groups or heterocyclic groups, R.sub.3 and R.sub.4 are hydrogen atoms, alkyl groups, alkoxy groups or halogen atoms; and Ar.sub.1 is an aromatic group or a heterocyclic group, process for producing those derivatives, and electrophotographic photosensitive member using the same.

Abstract: An electrophotographic photosensitive member comprises a photosensitive layer on a conductive support, wherein said photosensitive layer contains a compound, having structures (A) and (B) together in its structural formula and wherein said photosensitive layer contains a thioether compound represented by Formula (VI).

Abstract: A microwave planar antenna having an antenna body sandwiched between a radome and a rear cover, a plurality of clips for clipping the peripheral portions of the radome and the rear cover at a plurality of different points and then protective trims for covering the clips and the peripheral portion of the radome and the rear cover without using screws. Thus, productivity of assembly parts, such as the rear cover, protective trims and so on can be increased, efficiency in the assembly process can be increased and the waterproof property can be improved. In addition, it becomes possible to avoid having the protective trims become displaced.

Abstract: An electrophotographic photosensitive member which comprises a layer containing a compound represented by the formula (1) shown below: ##STR1## wherein A represents 1,2-, 2,3- or 3,4-benzocarbazolyl group; R.sub.1, R.sub.2 and R.sub.3, which may be the same or different, each represent hydrogen atom, alkyl group, aralkyl group, aryl group or heterocyclic group, with proviso that R.sub.2 and R.sub.3 cannot be hydrogen atoms at the same time.

Abstract: An animal motion toy wherein a toy body modeled in the form of an animal has movable arm frames on both sides, movable leg frames on both sides, an openable mouth portion, and a built-in sounding member. The arm frames are rotated by a first crankshaft incorporated in the toy body and the mouth portion is opened and closed and the sounding member makes a sound by a second crankshaft incorporated in the toy body. The leg frames are moved by a third crankshaft incorporated in the toy body. A gear changeover mechanism is connected to a motor which is turned on when a microphone provided in the toy body receives a sound generated by an external signal. The gear changeover mechanism is operative to drive either said first and second crankshafts or said third crankshaft.

Abstract: There is provided a method and apparatus for upwardly excavating a shaft through destructible underground rock. The cutting operation is carried out by full face boring without relying on blasting. An operation for supporting the shaft side wall is carried out by means of frame segments loosely following the advance of the bit. The cutting operation and supporting operation are independent from one another. The diameter of the bit is contracted after the cutting operation to allow the bit to be lowered down through the frame segments.

Abstract: There is provided a method and apparatus for supporting the wall of an upwardly excavated shaft. Cylindrical support frames which are successively thrust up through the shaft are respectively composed of several arcuate members and one or more disjointing members. A plurality of top supporting plates are provided on the top of the series of the cylindrical frames and are designed to fall inwardly toward the center of the shaft after the excavation of the shaft is terminated, thus constructing an umbrella like device for supporting the roof of the shaft.