Abstract: An amplification gain adjusting circuit in which the gain of an AC amplifier is controlled by a voltage dividing series connection of two resistors. One of the resistors is selectively shorted by a switching transistor. The DC bias of the switching transistor is set to prevent current flow through the base of the switching transistor at high AC levels.

Abstract: An automatic sound volume device which adjusts the volume of an audio signal in a vehicle to compensate for vehicle noise. A time constant circuit smooths the level output of a microphone to smooth the volume variations. However, the time constant is long for increases in noise but short for decreases in noise.

Abstract: The present invention provides a thermosetting alkyd resin coating composition consisting essentially of (A) an alkyd resin or a fatty acid-modified alkyd resin obtained by reacting a polybasic acid component with a polyhydric alcohol component using or without using a fatty acid conjointly with the components and (B) a crosslinking agent, the composition being characterized in that the polyhydric alcohol component comprises an alkanolamine having at least two hydroxyl groups in the molecule.

Abstract: A sound field correcting device for use in a stereophonic system intended for vehicular use. Speakers are installed on opposite sides of both the front and rear seats of the vehicle. The number of persons seated in the vehicle is determined and applied to a correcting unit. When plural persons are seated in the vehicle, the sound pressure levels in the high-frequency range of loudspeakers is increased. Also, the sound pressure levels of the speakers can be corrected in accordance with the positions at which persons are seated in the vehicle.

Abstract: An automatic gain control unit particularly adapted for vehicular use is disclosed. The ambient noise level inside the vehicle is detected, as is the level of the audio signal. A difference is formed between detection signals thus produced, and a frequency characteristic of a gain varying device, inserted in an audio signal path of the audio device, is varied according to this difference.

Abstract: An arrangement for facilitating correct coupling between a distributor and a cylinder head using a first to fourth alignment marks located either on the distributor or on a cylinder head. The first alignment mark is provided on a coupling claw arranged at the end of a distributor shaft for coupling with a coupling groove at the end of a driving camshaft, the second alignment mark is provided on a housing boss of the distributor, the third alignment mark is provided on a housing body of the distributor; and the fourth alignment mark is provided on the end of the cylinder head accommodating the driving camshaft.

Abstract: A mobile sound field correcting system for correcting an acoustic characteristic in a vehicle sound field formed by direct waves radiated from loudspeakers and reflected waves thereof providing satisfactory acoustic characteristics for different vehicles and different listening points within a vehicle. A first correcting means corrects a power spectrum of each loudspeaker in a frequency range above a frequency at which a decrease of starts of the power spectrum in a high-frequency range of each loudspeaker. Second correcting means corrects for irregularities in the frequency characteristic of each loudspeaker caused by interference of the direct waves with the reflected waves in a frequency lower than the drop-off frequency of this power spectrum.

Abstract: A process for preparing a stable dispersion in an aqueous medium of particles of polymer, said process comprising the steps of:(a) reacting at least one radically polymerizable monomer in an organic liquid in the presence of a dispersion stabilizer for the particles to form particles of polymer insoluble in said organic liquid and water, said stabilizer being a resin having in each of its molecules on the average at least 0.3 unit of a polymerizable double bond and a functional group that can be neutralized with an acid or a base, said resin being capable of being emulsifiably dispersed or dissolved in an aqueous medium by neutralization;(b) neutralizing with acids or bases the functional group of the resin as a dispersion stabilizer; and(c) replacing the organic liquid of the resulting dispersion of polymer particles with an aqueous medium.

Abstract: A rocker arm spring particularly suitable for use in a valve actuating mechanism of the type wherein a rocker arm is mounted to the cylinder head by way of a universal pivot and wherein an overhead cam shaft engages an intermediate portion of the rocker arm. The universal pivot (28) includes a support socket (30) and a pivotable shaft (40), with the part-spherical convex lower end of the shaft (40) received in the part-spherical concave bearing surface (38) of the socket (30). The rocker arm spring (50) has an upper arm (56) engaging the rocker arm (24) and a lower arm (58) having a forked end (68) engaging a circumferential groove (74) on the socket (30). The lower arm (58) is warped perpendicular to the plane thereof so that it is resiliently fitted without play within the groove (74).

Abstract: A cooling apparatus for cooling food products to be frozen from their both sides by putting said products between plural, vertically arranged cooling means comprises a rotary conveyor, a cooling means placed below the upper belt of the rotary conveyor and containing a low temperature cooling fluid to thereby cool the upper belt and at least one cooling vessel placed above the rotary conveyor so as to be vertically movable.

Abstract: A freezing apparatus is disclosed wherein a first and a second endless belt conveyor are disposed substantially horizontally put one upon another with a predetermined gap being left between the confronting runs of the conveyors, the conveyor belts being adapted to be separately cooled at their rear surfaces by means of cooled brine, and adapted so that products-to-be-frozen can be supplied into the gap from one end with their upper and lower surfaces being kept in contact with the exterior surfaces of the confronting runs of the moving belts to be conveyed towards the other end of the gap, whereby the products are quickly frozen by simultaneous cooling of their upper and lower surfaces. In this case, at least one of the belt conveyors is preferably composed of a flexible belt conveyor made of e.g. a thin rubber sheet.

Abstract: An apparatus for actuating valves consisting of a pair of main intake and exhaust valves and at least one auxiliary intake and/or exhaust valve, comprising cams on a single common cam shaft, for driving the associated valves, and rocker arms which can independently swing about fulcrum located in an alternate arrangement in an axial direction of the cam shaft, to transmit the movements of the cams to the associated valves so as to independently drive the valves.

Abstract: A supporting mechanism for a valve system such as an intake or exhaust valve assembly including a spherical projection provided on a rocker arm and a support member having a downwardly concave support surface which swingably and slidably supports the spherical projection. The support surface has a recess which can hold sludge at a lower portion of the support surface. The recess is communicated with the outer surface of the support member through a hole formed in the support member.

Abstract: A continuous freezing apparatus is provided with a flexible sheet conveyor arranged above products to be frozen placed on and carried by a steel conveyor so as to be in contact with the products and the flexible sheet conveyor is filled with cold brine, to thereby freeze said products through both upper and lower surfaces of contact. The width of the track of the flexible sheet is determined in such a manner that the track width is made substantially equal to the width of the flexible sheet at its turning areas where the flexible sheet does not in contact to the products and the track width is made narrow to the extent that a depressed slack sufficient to fill therein the cold brine is formed in the flexible sheet at a position where the flexible sheet is in contact with said products.

Abstract: An internal combustion engine having a plurality of cylinders each comprising a first intake valve, a first intake passage connected to the corresponding cylinder via the first intake valve, a second intake valve, and a second intake passage connected to the corresponding cylinder via the second intake valve. A second throttle valve is provided for each second intake passage and opens when the load of the engine is increased beyond a predetermined level. A blind common connecting passage is provided, which has a plurality of branch passages each being open to the corresponding second intake passage located downstream of the corresponding second throttle valve.

Abstract: A liquid separator in a refrigerating air conditioning apparatus to be provided in the pipeline connecting the compressor and the evaporator thereof is disclosed wherein a container having generally a horizontal cylindrical form with closed ends has its inside divided into two spaces by a rectangular partition plate elongating horizontally and secured at its three sides to the inside walls of the container, the other side being separated from one of the ends so as to leave a gap therebetween. Inlet and exit pipes for a refrigerant gas are secured to the outer wall of the container to be opened into the two spaces, a high pressure liquified refrigerant coil being disposed within the one of the spaces to which the inlet pipe opens so that its principal flow direction intersects orthogonally the direction of the inlet pipe.