Abstract: A charge controlling agent for electrostatic image development, which is a compound of the formula (I):Ar.sub.1 --(X--Ar.sub.2).sub.n (I)wherein each of Ar.sub.1 and Ar.sub.2 is a substituted or unsubstituted aromatic ring residue, X is a member selected from the group consisting of --CONH--, --NHCO--, --SO.sub.2 NH-- and --NHSO.sub.2 --, and n is an integer of at least 2, provided that a plurality of Ar.sub.2, or a plurality of X, are the same or different groups from one another, and toner and charge-imparting material employing the charge controlling agent.

Abstract: An electrostatic image-developing toner comprising at least a resin and a colorant, which further contains at least one compound of the following formula (I): ##STR1## wherein R.sub.1 is a C.sub.1-24 substituted or unsubstituted alkyl group or a substituted or unsubstituted aralkyl group, each of R.sub.2, R.sub.3 and R.sub.4 is a C.sub.2-24 substituted or unsubstituted alkyl group or a substituted or unsubstituted aralkyl group, and A is an aromatic ring residue which may have substituents.

Abstract: An imaging apparatus comprising a counterfeiting prevention arrangement and reliably preventing counterfeit reproduction of currency, negotiable certificates, and other registered documents is provided by preventing modification or removal of the counterfeiting prevention arrangement. Modification or removal of the counterfeiting prevention arrangement is prevented in this imaging apparatus by integrating circuit elements or components of the counterfeiting prevention arrangement with circuit elements or components of the image processors of the imaging system in a single chip, or sealing these components in a single mold, effectively preventing modification or removal of the counterfeiting prevention arrangement without disabling the imaging system.

Abstract: An electrophotographic photoreceptor comprising an electrically conductive substrate and a photosensitive layer formed thereon, wherein said photosensitive layer contains an arylamine compound of the following formula (I): ##STR1## wherein X is a hydrogen atom or a group of the formula (II): ##STR2## Y is a group of the formula (III) or (IV):--O--A.sup.1 --O-- (III)--A.sup.2 --O--A.sup.3 -- (IV)wherein, the substituents are defined hereafter.

Abstract: An electrophotographic photoreceptor comprising an electrically conductive substrate and a photosensitive layer formed thereon, wherein the photosensitive layer contains at least one member selected from the group consisting of compounds of the formula (I), (II), and (III) as defined in the specification.

Abstract: A toner for development of electrostatic images containing one or more compounds of formulae (I) and (II): ##STR1## where A and R each represent an aromatic ring residue, and the hydroxyl group and the amido group in the formula are bonded to the aromatic ring A at the adjacent positions, ##STR2## where A.sup.1, A.sup.2, R.sup.1 and R.sup.2 each represent an aromatic ring residue, and the hydroxyl group and the amido group in the formula are bonded to the aromatic ring A.sup.1 or A.sup.2 at the adjacent positions; and n represents an integer. The toner is highly safe and has sufficient charge properties and charge stability.

Abstract: In a starter for internal combustion engines, a tubular pinion gear support shaft 8 is rotatably supported by a casing, and coupled to a drive shaft of a motor so as to be rotatively driven by the motor, and an annular pinion gear 3 is fitted on the pinion gear support shaft in axially slidable but rotatively drivable relationship. A push rod 9 is axially slidably received in the tubular pinion gear support shaft and provided with a free end engaged with a free end of the pinion gear for transmitting a shifting force for driving the pinion gear into meshing with a ring gear of an engine from a shift lever to the push rod. A shift spring 15 consisting of a compression coil spring is coaxially received in the pinion gear support shaft and interposed between an associated end of the shift lever and a base end of the push rod. Thus, the assembling of the starter is simplified while the action of the shift spring is stabilized, and the design of the starter is made compact.

Abstract: There is provided a method to be applied to a tape recorder of the type for storing and retrieving reference signals on a plurality of tracks of a magnetic tape by a magnetic head comprising, as integral parts thereof, writing sections and reading sections arranged at a given pitch for at least two channels for detecting a signal on a reference position of a track by a related one of the reading sections of the magnetic head for each channel. This is done by moving the magnetic head in order to detect the positional relationship between the related writing and reading sections of the magnetic head and the track on the magnetic tape for each channel.

Abstract: An electrophotographic photoreceptor comprising an electrically conductive support and a photosensitive layer formed thereon, wherein said photosensitive layer contains an arylamine compound of the formula (I): ##STR1## wherein each of Ar.sup.1, Ar.sup.2, Ar.sup.3 and Ar.sup.4 which may be the same or different, is an aryl group which may have substituents, or a heterocyclic group which may have substituents, each of R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5 and R.sup.6 which may be the same or different, is a hydrogen atom, a hydroxyl group, a halogen atom, an alkyl group which may have substituents, an alkoxy group which may have substituents, or a phenyl group which may have substituents, and each of R.sup.7 and R.sup.8 which may be the same or different, is a hydrogen atom, a halogen atom, an alkyl group which may have substituents, or an alkoxy group which may have substituents.

Abstract: An error removal system to be applied to a tape recorder of the type that stores and retrieves data in and from a plurality of tracks of a magnetic tape by means of a magnetic head includes the steps shifting the position of the magnetic head and detecting the center line of the target track from the data being retrieved by the magnetic head so that the magnetic head can be correctly placed on the center line of the target track and the data retrieval operation can be correctly resumed. With such an arrangement, the magnetic head of the data backup tape recorder can effectively and surely regain the target track even if an error is found in the retrieved signal due to an off-track condition. Other errors may be removed by employing a series of microstep adjustments to the magnetic head.

Abstract: An electrophotographic photoreceptor is formed by a photosensitive layer containing a naphtylhydrazone compound of the formula: ##STR1## wherein X and Y are independently a hydrogen atom, lower alkyl group, lower alkoxy group, phenoxy group or arylalkoxy group; R.sup.1 is a naphtyl group; R.sup.2 is a hydrogen atom, lower alkyl group, allyl group, substituted or unsubstituted phenyl group, or aralkyl group; and l and m are 1 or 2. The photoreceptor thus formed is not only highly sensitive but resistant to ozone deterioration, which markedly improves the durability thereof.

Abstract: An electrophotographic photoreceptor comprising an electrically conductive support and a photosensitive layer formed thereon, wherein said photosensitive layer contains at least one member selected from the group consisting of hydrazone compounds of the formulas (I), (II) and (III): ##STR1## wherein X is a hydrogen atom or a group of the formula (IV):--C(R.sup.8).dbd.N--Q.sup.2 (IV)Q.sup.1 is a group of the formula (V), (VI), (VII), (VIII) or (IX); Q.sup.2 is a group of the formula (VI), (VII), (VIII), (IX) or (X); each of Q.sup.3 and Q.sup.

Abstract: An electrostatic image-developing toner comprising at least a resin and a colorant, which contains at least one compound selected from the group consisting of a hydroxynaphthlenecarboxylic acid compound, a hydroxyanthracenecarboxylic acid compound, a bishydroxynaphthalenecarboxylic acid compound a bishydroxyanthracenecarboxylic acid compound, and a metal compound of a pamo acid-type compound.

Abstract: In a starter system for an internal combustion engine using a planetary reduction gear unit, the internal gear of the planetary reduction gear unit, the center bracket accommodating the internal gear and the pinion cover are joined together so as not to rotate relative to one another by using radial projections provided in the outer circumferential surface of the internal gear which are passed through openings provided in the center bracket and received by associated recesses provided in the pinion cover. The three members are thus prevented from rotating relative to one another with a simple structure which is also easy to assemble. The projection of the internal gear may also be used for securing an annular seal member interposed between an axial end surface of the internal gear and the corresponding shoulder surface of the center bracket.

Abstract: In a starter system for an internal combustion engine, an input member of an overrunning clutch is provided with an annular shoulder surface abutting an annular end surface of a cylindrical boss portion of a reduction gear unit casing when the overrunning clutch is at a rest position, and a cylindrical sleeve portion extends from the annular shoulder surface towards the reduction gear unit so as to be closely fitted on the cylindrical boss portion of the reduction gear unit casing. Thus, water and other foreign matters are not only shut off by these mutually abutting annular surfaces, but also prevented from reaching this region by the cylindrical sleeve portion closely fitted on the cylindrical boss portion of the reduction gear unit. Also, the centrifugal force prevents water and other foreign matters from reaching this area when the starter is actuated and the two annular surfaces are not in contact.

Abstract: An electrophotographic photoreceptor comprising an electrically conductive support and a photosensitive layer formed thereon, wherein said photosensitive layer contains an arylamine compound of the formula (I): ##STR1## wherein each of Ar.sup.1 and Ar.sup.2 which may be the same or different, is an arylene group which may have substituents, each of R.sup.1, R.sup.2, R.sup.3 and R.sup.4 which may be the same or different, is an alkyl group which may have substituents, an aryl group which may have substituents, or a heterocyclic group which may have substituents, provided that R.sup.1 may, together with R.sup.2 or Ar.sup.1, form a ring containing the adjacent nitrogen atom, and R.sup.3 may, together with R.sup.4 or Ar.sup.2, form a ring containing the adjacent nitrogen atom, each of R.sup.5, R.sup.6, R.sup.7 and R.sup.

Abstract: An electrostatic image-developing toner comprising at least a resin and a colorant, which contains at least one member selected from the group consisting of compounds of the following formulas (I) and (II): ##STR1## wherein each of R.sup.1, R.sup.2, Ar.sup.1 and Ar.sup.2 is a substituted or unsubstituted alkyl group, or a substituted or unsubstituted aralkyl group, and A is (B) (SO.sub.3.sup..crclbar.).sub.2 or MX.sub.6.sup.2.crclbar., wherein B is ##STR2## (wherein each of R.sup.3 and R.sup.4 is a hydrogen atom, an alkyl group, a hydroxyl group or an amino group), M is a titanium atom, a zirconium atom or a silicon atom, and X is a fluorine atom, a chlorine atom or a bromine atom.

Abstract: A starter system for an internal combustion engine having a casing provided with a mounting circumferential surface adapted to be substantially closely fitted into an associated mounting bore provided in the engine or a transmission housing associated therewith, and a mounting flange extending radially from the casing and provided with a mounting end surface perpendicular to a longitudinal line of the output shaft of the starter system and spaced from the mounting circumferential surface along the longitudinal line. Because of the presence of the distance between the mounting end surface of the mounting flange and the mounting circumferential surface of the starter casing closely fitted into the mounting bore, the reaction force acting on the pinion is prevented from being amplified and transmitted to the mounting surfaces by means of an undesirable lever action.

Abstract: A method of detecting an edge of a magnetic tape, using a magnetic head device with a magnetic head capable of reading after writing and having a read gap and a write gap, and a switch for selectively electrically connecting the write gap to a write circuit and a read circuit. The steps of the method are: running the tape while moving the magnetic head from a predetermined initial position in the widthwise of the tape until the magnetic head reaches the edge of the tape to record a signal on the tape; subsequently rewinding the tape to the predetermined initial position to return the magnetic head to a position of the tape where the signal has been recorded; subsequently, under the condition of electrically connecting the write gap to the read circuit to cause the write gap to serve as a read gap, running the tape while causing the magnetic head to follow the signal recorded on the tape to read the signal; and subsequently comparing the read signal with a reference value to detect the edge of the tape.

Abstract: An organic electroluminescent device having an organic hole injection transport layer and an organic luminescent layer formed between two conductive layers constituting electrodes, wherein the organic hole injection transfer layer contains a hydrazone compound of the following formula (I): ##STR1## wherein A is a monovalent or bivalent organic group containing at least one aromatic hydrocarbon ring or aromatic hetero ring which may have a substituent, each of R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sup.5 is a hydrogen atom, or an alkyl, aralkyl, aromatic hydrocarbon or heterocyclic group which may have a substitutent, each of R.sup.6 and R.sup.7 is an alkyl, aralkyl, aryl, aromatic hydrocarbon or heterocyclic group which may have a substituent, l is an integer of 0 or 1, m is an integer of 0, 1 or 2, and n is an integer of 1 or 2, provided that A, R.sup.1 and the carbon atom to which R.sup.1 is bonded, or R.sup.6, R.sup.7 and the nitrogen atom to which R.sup.6 and R.sup.