Abstract: This invention relates to a composition of matter of a silica sol/water soluble cationic polymer mixture. The colloidal silica may also be conditioned by passing over a cationic exchange resin prior to addition of cationic polymer.

Abstract: A magneto-optical recording and reproducing apparatus achieving an improvement in high density recording and bit error correction rate. The magneto-optical recording and reproducing apparatus comprises coding and modulating means for (1,7) RLL encoding and then NRZI encoding a digital information series {A.sub.i }; recording and reproducing means for recording the encoded series {a.sub.i } to a magneto-optical recording medium, and reproducing an analog signal from the medium as elementary waveform sequence e(t) using an optical head; a transversal filter type waveform equalizer for waveform equalizing elementary waveform sequence e(t) by applying the transfer function (1+2D+2D.sup.2 +D.sup.3) of the PR(1,2,2,1) encoding method to the elementary waveform of the encoded sequences, where delay operators D have a delay time of the encoded sequence cell width T.sub.

Abstract: A magneto-optical recording apparatus capable of maintaining decoding performance even if the recording density at the magneto-optical recording is high. The magneto-optical recording apparatus comprises a modulator for RLL (Run-Length Limited) encoding recording data, an NRZI encoder for NRZI-encoding a RLL code from the modulator, an equalizer for equalizing a read-out analog signal obtained from a magneto-optical recording medium into a waveform (1+D).sup.n (n is a positive integer) assuming that the delay time for one bit period of the read-out signal is D, a low pass filter, and a Viterbi decoder that uses the difference between a sample value obtained by quantizing an output from the low pass filter and an expected value obtained from a theoretical value of a data column to make the most probable path to be decoding data.

Abstract: A recyclable vehicular cushioning material which is thermoformed from a web composed of three-dimensionally crimped polyester fiber having a fineness lower than 45 denier per filament and an initial tensile strength (IS) higher than 30 g/d and heat-bonding fiber containing polyester elastomer, as heat-bonding component, which are mixed and dispersed and, if necessary, interlaced, said cushioning material having a layer whose bulk density is 0.02-0.06 g/cm.sup.3.

Abstract: An improvement of a liquid pressure booster provided with a reaction piston is disclosed. A guide formed on a housing (plug) is caused to project into a tubular section of a power piston. A reaction piston is slidably supported by the guide, and an input shaft is slidably supported by the reaction piston. A spring which urges the reaction piston is disposed in a clearance defined between the outer periphery of the guide and the inner periphery of the tubular section of the power piston. In this manner, the guide, a sliding portion of the reaction piston, a sliding portion of the input shaft and the spring can be disposed radially of each other while overlapping each other in the axial direction to minimize the axial size of the liquid pressure booster.

Abstract: The invention relates to a hydraulic pressure booster which can be used to perform servo control of input and output at the preset servo ratio in, for example, a brake booster. In particular, the invention relates to a hydraulic pressure booster, which is designed to reduce the loss stroke of an input shaft in the initial stage of operation. This can be achieved by providing a stopper which directly abuts the input shaft when it is non-operational and which maintains the input shaft at the preset advance position separated from the detent in relation to the power piston.

Abstract: The present invention relates to an full-arc admission steam turbine having its output controlled by regulating the opening of a steam regulating valve. The full-arc admission steam turbine is run at a higher efficiency than that of the full-arc admission steam turbine of the prior art by improving the drop in the internal efficiency of the turbine due to the throttle loss of the valve. Moreover, a substantially constant high efficiency is maintained for the time period from the designed point of a partial load to the rated load if the second blade stage group is selected to provide an internal efficiency substantially equal to that of the blade stage group of the prior art.

Abstract: Fluorine-containing aromatic derivatives are produced by the reaction of di(haloacyl)peroxide represented by the general formula: ##STR1## (wherein X stands for a fluorine, chlorine, or hydrogen atom and n for an integer of the value of 1 to 10) with aromatic unsaturated monomers represented by the general formula: ##STR2## (wherein Y stands for hydrogen atom, methyl, ethyl, propyl, acetyl, propionyl, acetyloxy, propionyloxy, methoxy, ethoxy, propoxy, vinyl, isopropenyl, or nitro group, or a halogen atom, R.sup.1 for hydrogen atom, methyl, ethyl, propyl, or butyl group, R.sup.2 for hydrogen atom, methyl or phenyl group, and m for an integer of the value of 1 to 5).

Abstract: A ghost canceling apparatus provided with a reference waveform Fourier coefficient holding unit in which a normal ghost detection unit holds a Fourier coefficient produced by Fourier transforming a reference waveform; a nearby region Fourier transform unit for Fourier-transforming a nearby region of a reference waveform extracted from the received television signal and a normal Fourier transform unit for Fourier transforming a normal region of the reference waveform extracted from the received television signal; a calculation unit for dividing the output from the normal region Fourier transform unit by the output from the nearby region Fourier transform unit and then for multiplying a Fourier coefficient of the reference waveform Fourier coefficient holding unit; a reverse Fourier transform unit for reverse Fourier transforming the output of the calculation unit; a tap gain supplying unit for supplying the dummy normal ghost producing unit with the output of the reverse Fourier transform unit as a tap gain of

Abstract: A power piston assembly of a brake booster includes a power piston including a stepped cylindrical portion having a through-hole. A diaphragm is provided on the rear surface of the power piston. The diaphragm has an inner-circumferential bead which is connected to the rear end of the cylindrical portion of the power piston. The valve body has a stepped cylindrical portion which engages with the stepped portion of the power piston and is disposed in the through-hole of the power piston with the diaphragm bead in sealing contact with the valve body. A retainer is pressed fitted into the cylindrical portion of the power piston so as to abut the front surface of the valve body to secure the valve body in close contact with the power piston.

Abstract: A ghost canceling circuit comprising a Fourier transforming circuit for Fourier transforming a reference waveform contained in the received television signal while converting the analogue signal into digital form, a device for holding and outputting a reference waveform Fourier coefficient obtained by Fourier transforming the reference waveform contained in the television signal at the transmission side, a signal processing portion in which the outputted reference waveform Fourier coefficient is divided by the result of the A/D conversion, the divided Fourier coefficient is reverse Fourier transformed, and the reverse Fourier transformed Fourier coefficient is supplied to a transversal filter recognizing it as a tap gain.

Abstract: A parking maintaining apparatus includes a solenoid-operated open/close valve which opens or closes a constant pressure passage providing a communication between a valve mechanism and a constant pressure chamber of a brake booster. A relief valve is provided which relieves a pressure within the constant pressure passage into the constant pressure chamber when such pressure exceeds a given value. The provision of the relief valve allows the pressure within a variable pressure chamber to be maintained at or below the given value through the valve mechanism under a parking maintaining condition, whereby the pressure within the variable pressure chamber can be rapidly displaced as the parking maintaining condition is to be terminated, thus eliminating a partly braked condition.

Abstract: A pair of shells which form a booster are coupled together by an improved structure. One of either the inner periphery of the opening of the first shell or the outer periphery of the second shell is formed with a projection which projects radially toward the other shell and which is received in a recess formed therein. The engagement between the projection and the recess positively prevents a relative rotation between the shells, and thus avoids the sole reliance upon the resilience of a diaphragm held therebetween, as has been required in the prior art construction. A high accuracy in shaping the shells is thereby not required, facilitating the quality control and allowing a reduction in the manufacturing cost.

Abstract: A first shell in a booster enclosure is substantially cup-shaped, and a second shell is substantially plate-shaped and has an annular groove which opens radially outward. The second shell is fitted inside the first shell. The inner surface of the annular groove and the inner circumference of the first shell clamp an outer circumferential beaded part of a diaphragm. The second shell is prevented from disengagement from the first shell by engaging pawls formed on the first shell. A reinforcing cylindrical or conical portion is formed at the part of the second shell which is brought into contact with the engaging pawls of the first shell. This reinforcing portion improves the rigidity of this part and prevents the deformation of the second shell by the engaging pawls.

Abstract: In a brake booster a seal unit is provided which maintains a shell hermetically sealed in particular, in a region where a valve body reciprocates with respect to the shell and which guides the valve body in sliding contact with the shell. A portion of a seal member disposed between the shell and the valve body which is in sliding contact with the valve body is supported by a retainer to function as a bearing.

Abstract: An input pressure detecting device is arranged in an input side of a pneumatic brake booster, which comprises an elastic member having a given portion which expands when a pressure is applied to the elastic member, a pressure sensor for issuing, upon receiving a pressure, a signal representative of the intensity of the pressure applied thereto, and an axially movable piston intimately disposed between the given portion of the elastic member and the pressure sensor. Upon application of force to the elastic member due to depression of the brake pedal, the elastic member is compressed causing the given portion to expand and thus applying a corresponding but small pressure to the pressure sensor through the piston.

Abstract: A brake power servo booster in which a power piston is slidably disposed in a shell, a master cylinder is connected to the brake pedal side of the shell, an input shaft is used to actuate a valve mechanism in order to generate a pressure difference between the forward and backward sides of the power piston, an output shaft is used to connect the power piston and a piston contained in the master cylinder, and a stopper member is provided in the housing of the master cylinder for limiting the retreat position of the input shaft.

Abstract: A brake booster, in particular, a construction for strengthening the coupling between the brake booster and a master cylinder, is disclosed. A strengthening plate is interposed between the head of a bolt extending through an enclosed shell and the inner surface of the shell and the bolt head is ring projection welded to the strengthening plate, which is in turn projection welded to the shell while maintaining a hermetic seal therebetween at a location outside of the welding location of the bolt.

Abstract: A brake booster, in particular, a construction for strengthening the coupling between the brake booster and a master cylinder, is disclosed. The head of a bolt which extends through an enclosed shell is welded to the internal surface of the shell so as to maintain a hermetic seal, and a strengthening plate disposed around the bolt head is welded to the internal surface of the shell. Additionally, a reinforcing member fixedly connected to the strengthening plate is welded to the bolt head to improve the rigidity of the strengthening plate.

Abstract: A resin composition is resistant to heat and impact and comprises (a) a polyphenylene ether resin, (b) a rubber graft copolymer resin obtained from a rubbery polymer having a glass transition temperature of 0.degree. C. or lower, an aromatic vinyl monomer and an alpha, beta-unsaturated dicarboxylic anhydride monomer and (c) a block copolymer of an aromatic vinyl monomer and an aliphatic diene monomer. It may contain a mono-olefinic monomer having a nitril or carboxylic ester group as the rubber graft copolymer resin.