Abstract: A heterocyclic compound of the formula, ##STR1## wherein A and B are each hydrogen, halogen, alkyl or alkoxy, R.sup.1 is alkylene having upto 6 carbon atoms, X is direct linkage or divalent group such as --O--, --S--and the like, T and U are each hydrogen or alkyl, l is 0 or 1 to 3, Q is 5-, 6- or 7- membered saturated or unsaturated heterocyclic residue, and Y is hydrogen, halogen, alkyl, alkoxy or ##STR2## and B are taken together with each other to form methylene-dioxy, which is useful for dyeing or printing hydrophobic fiber materials with superior dyeability to give a dyed or printed product of a red color excellent in fastness properties, particularly those such as washing fastness.

Abstract: A benzodifuranone compounds of the formula, ##STR1## wherein R.sup.1 and R.sup.2 are each independently a naphthyl group or an unsubstituted or substituted phenyl group, which is useful for dyeing or printing hydrophobic fiber materials, is prepared in high purity and high yield by allowing benzofuran compounds of the formula, ##STR2## wherein R.sup.1 is as defined above, to react with acetonitrile compounds of the formula, ##STR3## wherein R.sup.2 is as defined above, and then carrying out an oxidation reaction to give the benzodifuranone compound.

Abstract: A heterocyclic compound which is useful for dyeing or printing hydrophobic fiber materials and which has the following formula (I), ##STR1##wherein A.sub.1, A.sub.2, A.sub.3 and A.sub.4 are each hydrogen, halogen, alkyl, alkoxy or alkenyl, X.sub.1 is --O-- or the like, R.sub.1 is a methylene or the like, X.sub.2 is a direct linkage or a divalent group of --O--, --S--, --SO--, --SO.sub.2 --, ##STR2## in which R.sub.3 is a hydrogen atom or a C.sub.1-4 alkyl group, ##STR3## in which R.sub.3 is as defined above, T and u are each independently hydrogen or a C.sub.1-4 alkyl, l is O or an integer of 1 to 3, Q is an unsubstituted or substituted 5-, 6- or 7-membered saturated or unsaturated heterocyclic residue, Y is hydrogen, C.sub.1-4 alkyl, a C.sub.1-4 alkoxy group or the like.

Abstract: The present invention relates to a pedal movement control and recording apparatus for an automatic music playing piano in which the pedal displacement corresponding to sequentially changing pedal control signals is determined in order to generate a pedal position conversion table, and which provides means for generating position data normalization tables and reverse normalization tables, whereby music performed on one piano can be replayed on a second automatic music playing piano, correcting for the unique response characteristics of each piano, thereby preserving nuances of pedal movement during replay.

Abstract: A heterocyclic compound of the formula, ##STR1## wherein A and B are each hydrogen, alkyl or alkoxy, Y is hydrogen, alkyl, alkoxy or --O--R.sup.2 --X--R.sup.1, or Y and B are taken together with each other to form methylenedioxy, R.sup.1 is alkyl, phenyl or alkenyl, R.sup.2 is unsubstituted or substituted alkylene, and X is --O--, --S--, --SO--, --SO.sub.2 -- or ##STR2## in which R.sup.3 is hydrogen or alkyl, with the proviso that R.sup.1 is C.sub.3 or C.sub.4 alkyl or alkenyl, or C.sub.1 -C.sub.4 alkyl when R.sup.2 is unsubstituted ethylene or propylene, respectively, X is --O-- or --S--, and Y and B don't form methylenedioxy, which is useful for dyeing or printing hydrophobic fiber materials with superior dyeability to give a dyed or printed product of a red color excellent in fastness properties, particularly those such as washing fastness.

Abstract: A monoazo compound of the formula, ##STR1## wherein D is a heterocyclic or carbocyclic compound residue such as benzothiazolyl and phenyl, X is hydrogen, alkyl, alkoxy, halogeno, acylamino or the like, Y is hydrogen, halogeno, alkyl, alkoxy and the like, R.sub.1 is alkyl, R.sub.2 is C.sub.2 -C.sub.4 alkylene, B is a bridging group such as ##STR2## --O--, --S--, C.sub.1 -C.sub.6 alkylene and the like, and W.sub.1, W.sub.2, W.sub.3, Z.sub.1, Z.sub.2 and Z.sub.3 are independently hydrogen, alkyl, halogeno or the like, which is useful for dyeing hydrophobic fiber materials to give dyed or printed product of a deep color excellent in fastness properties, particularly those such as washing fastness, even after various finishing treatments of the product.

Abstract: A monoazo compound of the following formula, ##STR1## wherein X is a hydrogen or halogen atom, or a C.sub.1-4 alkyl, C.sub.1-4 alkoxy, C.sub.1-4 alkylsulfonyl, C.sub.1-4 alkylcarbonyl, C.sub.1-4 alkoxycarbonyl, nitro, cyano or trifluoromethyl group, Y is a hydrogen or chlorine atom or a methyl or acylamino group, and Z is a hydrogen or chlorine atom or a methyl, methoxy or ethoxy group, which is useful for dyeing or printing hydrophobic fibers with superior level dyeing and build-up properties to give dyed products of a brilliant color superior in fastness properties.

Abstract: In construction of a key musical instrument such as a piano, a swingable element such as a hammer is accompanied with a pneumatic damper having an air vent so that, when impulsive load is applied by motion of the swingable element, fluid viscous resistance caused by flow of air in the pneumatic damper well absorbs shock, thereby greatly suppressing undesirable bound of said swingable element on return to its initial rest position.

Abstract: In an optical sensor for displacement speed/displacement of a movable element in a musical instrument, light emitted from a light-emitting element is guided to a sensor head through a transmission optical fiber and is further guided to a light-receiving element through a reception optical fiber. The sensor head is located at a position corresponding to a shutter movable in accordance with the movable element in the musical instrument. The shutter controls photocoupling and nonphotocoupling between the transmission and reception optical fibers. The sensor is of transmission or reflection type.

Abstract: A key-driving/detecting mechanism for performing automatically a keyboard instrument is constituted by a plurality of keys arranged on a key bed, each key being rotatable about a balance pin secured to a balance rail, and an electromagnetic device interposed between a lower surface of each key and the key bed at a position to the rear of the balance pin. Each electromagnetic device comprises an electromagnetic oil mounted on the key bed and a permanent magnet secured to a rear surface of the key. The simplicity of the key-driving/detecting mechanism is implemented by this disposition of the electromagnetic device. In a modification a pair of electromagnetic devices are provided in front of and in rear of the balance pin.

Abstract: In a solenoid actuator for use in an automatic performance keyboard instrument of the type comprising a key bed and a plurality of keys mounted on the key bed through seesaw mechanisms, electromagnetic actuators respectively corresponding to the keys and having a common yoke are disposed between the key bed and the keys. Each of the electromagnetic actuators independently actuates the corresponding key. The yoke and the electromagnetic actuators are assembled into a compact unit, thereby being readily incorporated between the key bed and the keys.