摘要:
A method of directly precipitating a spherical amorphous silica in a high yield by adding a carboxymethyl cellulose (CMC) as a coagulation growing agent in a step of neutralizing the alkali silicate with an acid. The CMC having a particular etherification degree and a particular polymerization degree is added in an amount of from 1 to 100% by weight reckoned as SiO.sub.2 with respect to silica in the alkali silicate, whereby the whole silica particles turn into spherical amorphous silica particles having high sphericalness. There can be obtained spherical amorphous silica particles having a BET specific surface area of from 25 to 800 m.sup.2 /g, an apparent specific gravity of from 0.1 to 0.8 and a particle diameter of from 0.2 to 50 .mu.m cheaply and in a high yield.
摘要:
A data printing system has a controller which controls the printing of jobs from at least one input unit by a printer. When the controller receives a plurality of jobs, it establishes a sequential order of transmission and generates a display signal indicating the times at which the respective jobs will be printed. That display signal may then generate a display at the input unit(s) or at a display associated with the controller itself. In this way, users are given information about the times of printing. The sequence of printing of the jobs may be established on the basis of a priority associated with the jobs themselves and/or on the amount of material currently available for printing by the printer and/or on the maximum capacity of printed paper. Display may be associated with that amount and/or capacity.
摘要:
An optical disc having address information recorded in a wobbling manner is arranged to record or reproduce data at correct positions. A track is previously formed as a pregroove and is wobbled in accordance with address information. The track is divided into a plurality of sectors. A plurality of sync marks S are formed in each sector, and at least one of the sync marks in one round of the track is formed as a reference mark R different from the other sync marks S. To reduce overhead and to achieve highdensity random recording and reproduction, a method may also be used in which one cluster of data is formed of a data area and a link area located between data areas and consisting of two frames, in which each of the data area and the link area has a structure formed of unit frames separated by a sync signal (frame sync), and in which data is recorded or reproduced as unit clusters.
摘要:
An optical disc having address information recorded in a wobbling manner is arranged to record or reproduce data at correct positions. The optical disc includes at least one track on which data is recorded and which is previously formed as a pregroove wobbled in accordance with an address information, where the track has a plurality of frames wobbled in accordance with the address information, and further where a plurality of sync marks is formed in each of said frames by wobbling said pregroove at a center frequency of frequencies of wobbling with the address information.
摘要:
The present invention is directed to a magnetic recording medium comprising a non-magnetic support having provided thereon a plurality of magnetic layers composed of a lower magnetic layer comprising a ferromagnetic powder and a binder, and an upper magnetic layer comprising a ferromagnetic powder being provided on the lower magnetic layer, wherein the ferromagnetic powder contained in the upper magnetic layer has a length of major axis not longer than 0.30 .mu.m and a crystallite size not larger than 400 .ANG., the upper magnetic layer has a dry thickness of not more than 1.20 .mu.m, and the surface of the upper magnetic layer has a center-line average surface roughness (Ra) not more than 0.015 .mu.m.
摘要:
A low impedance amplifier include a matching circuit composed of passive elements and active elements for matching the input impedance of the amplifier to a piezoelectric and/or pyroelectric signal generated in a low impedance structure; and an amplifying circuit composed of passive elements and active elements for amplifying the input signal simultaneously as the impedance matching. The amplifier is capable of electrically amplifying low impedance electrical phenomena. Accordingly, the amplifier permits accurate detection of structural abnormality in various structures. As one application example of the above amplifier to structural abnormality detection, a method of applying the amplifier of the present invention to a musical instrument enables any existing musical instrument to be used as an electric instrument without changing its original sound quality and provides the possibility of realizing a new instrument.
摘要:
A scroll type compressor which includes a spacer between the fixed scroll base plate and the frame, with the spacer disposed about the orbiting scroll. The spacer is coupled to the fixed scroll and frame, and can be coupled to a center shell of the compressor, for example, by a shrinkage fit. Further, one or more bolts extend from the fixed scroll base plate through the spacer and into the frame. In addition, one or more bolts can be provided which extend from the spacer to the frame to provide for positioning of the spacer with respect to the frame.
摘要:
A scroll type compressor comprising: a crankshaft having an eccentric shaft portion formed thereon; an orbiting scroll which is given torque by the crankshaft through the eccentric shaft portion; and bearing means for rotatably supporting the crankshaft; wherein at least one of the eccentric shaft portion and the bearing means is constituted by a rotatably engaged bushing and a curved surface portion.
摘要:
An optical disc recording apparatus for recording information signals on an optical disc having an optical recording medium with a larger than normal thermal time constant, such as an organic dyestuff base material, by irradiating the disc with a recording light modulated by signals produced by eight/fourteen modulation of information signals, is disclosed. The apparatus includes a recording pulse forming unit for forming recording pulses from the eight/fourteen modulated signals, which recording pulses are of pulse widths shorter than the eight/fourteen modulated signals by a pulse width corresponding to the elongation from the regular length of a pit formed on the recording medium on the basis of the eight/fourteen modulated signals, and an optical head supplied with the recording pulses formed by the pulse forming unit for producing the light which has been pulse width modulated by the recording pulses.
摘要:
An apparatus for use with a compact disc for writing and reproducing data into an arbitrary sector or rewriting data of an arbitrary sector by allowing the selection of an interleave process similar to that in a music type compact disc or an interleave process of a length corresponding to one recording unit (sector) to thereby make possible sector-completion type encoding and decoding.