Abstract: The apparatus for detecting combustion timing includes: a microwave unit for generating a microwave of a predetermined frequency by a microwave oscillator and detecting the received microwave to convert the same into a low frequency signal; a probe comprising a microwave sensor for radiating the microwave into a combustion chamber and receiving a reflected wave and a light sensor for electrically detecting the light emitted upon combustion; and a processing unit comprising a peak detector unit for detecting peaks of the microwave signal, a luminous signal processor unit for detecting a peak value of the first peak of a luminous signal supplied by the light sensor in each cycle and also detecting the time when the luminous signal reaches an intensity having a predetermined proportion to the first peak value thereof, and an operating unit for operating a time difference between a midpoint between peaks of the microwave signal and the time when the luminous signal reaches an intensity having a predetermined prop

Abstract: A resistor composition for a resistor-incorporated spark plug, composed of glass, an inorganic aggregate and carbon, and adapted to be sealed in a centerbore in a ceramic insulator, at least 1% by weight of said aggregate being in advance mixed and calcined with an organic carbonaceous material to adsorb resultant carbonized carbon.

Abstract: An apparatus for detecting combustion timing in an internal combustion engine comprises: a microwave unit including a microwave oscillator for generating a microwave having a predetermined frequency, a transmission and reception separator for separating transmitted and received microwaves from each other, and a detector for detecting the received microwave so as to be converted to a low frequency signal; a probe including a microwave sensor for radiating the microwave from the separator into a combustion chamber and receiving a reflected wave, and a light sensor for electrically detecting light emitted upon combustion in the combustion chamber; and a processing unit including a peak detector circuit for detecting peaks of a microwave signal supplied by the detector, a luminous signal processor for detecting a peak value of a luminous signal supplied by the light sensor in each cycle and also detecting the time when the luminous signal reaches an intensity having a predetermined proportion to the peak value th

Abstract: A resistor composition for spark plugs comprises 100 wt parts of base mixture of 30-70 wt glass frit with the balance being an inorganic aggregate, 0.1-10 wt parts of carbonaceous material calculated as carbon, 0-30 wt parts of stabilizing agent for resistance under load and 0.1-15 wt parts of boron, boric acid and/or a borate. This composition reduces pores on sealing.

Abstract: A resistor composition for resistor-incorporated spark plugs, substantially consisting of 100 parts of a base mixture consisting of 30 to 70% of glass frit and the balance of inorganic aggregate; 0.1 to 7.0 parts, calculated on carbon upon sintering, of a carbonaceous material; and 0 to 30 parts of an agent for stabilizing resistance of the resistor under load, the glass frit containing 10 to 100% of lead glass having a PbO content of 30 to 88% and a softening point of 300.degree. to 600.degree. C. with the balance of a glass having a softening point exceeding 500.degree. C., each by weight ratio.

Abstract: An electrical self-purification ignition plug comprising a porcelain insulator ignition leg provided at its end surface opposed to a grounded electrode with a conical depression, and a center electrode exposed to the base surface of said conical depression and made integral with said porcelain insulator.

Abstract: A spark plug with a spark electrode prepared by mixing at least a matrix material of a titanium compound (e.g., TiO.sub.2, TiC, TiN, etc.) with an electrical conductivity-imparting substance (e.g., Pt and Pd, or a mixture of Pt, Pd and a noble metal, e.g., Au, Ru, Ag, Rh, etc.) and sintering the resulting mixture.

Abstract: A spark plug with a rivet-like tip center discharge electrode is obtained by melting powdery metal essentially consisting of noble metal Au, Ag and/or alloys thereof with Pd or the like charged in a small end bore formed at a discharge end bottom of a ceramic insulator then allowing to cool. Sealing and/or resistor incorporation together with setting (sealing) of a terminal rod may be done one-stepwise with the center electrode formation or two-stepwise after the center electrode formation. A resultant space in the center bore may be utilized for various purposes.

Abstract: A spark plug including an insulator body provided with a center bore and a bottom end defining a discharge end of the insulator body and a discharge center electrode formed in a region of the discharge end of the insulator body; a spark plug including thermal conductivity-controling material comprising spherical metal powder as an essential element thereof in the center bore providing function to control thermal conductivity of the spark plug. The conductivity controling material further comprises refractory powder and glass powder. The controling material is also composed of spherical metal powder coated with a ceramic layer of a mixture thereof with the spherical metal powder. The spark plug with the controling material permits an increasing conductance according to temperature rise to provide a thermally wide-ranged spark plug.

Abstract: A spark plug with a sphere-like center discharge electrode is obtained by pressing a sphere-like metal essentially consisting of noble metal Au, Ag and/or alloys thereof with Pd or the like set on a small end bore formed at a discharge end bottom of a ceramic insulator. Sealing of a sealing material and/or resistor material together with setting (sealing) of a terminal body may be done simultaneously with the pressing of the sphere-like metal on the small end bore by means of hot-pressing applied on the terminal rod head.

Abstract: Sliver weight unevenness correcting apparatus of a feed-forward type has: a sliver weight measuring section for detecting the variations in weight of a bundle of slivers; a correcting draft device having front rollers disposed downstream of the sliver weight measuring section relative to the direction of advancement of slivers, the front rollers being rotated at a constant speed, and back rollers disposed between the sliver weight measuring section and the front rollers, the back rollers being rotated at a variable speed; a rotation detector for detecting the number of revolutions of the front rollers; an unevenness correcting circuit having a ratio circuit for operating a ratio (E.sub.0 /E.sub.1) between a reference sliver weight (E.sub.0) and the detected weight (E.sub.1) thereof, a delay circuit for delaying the speed control of the back rollers of the correcting draft device for a predetermined period of time, and a contrasting operational circuit for multiplying the ratio (E.sub.0 /E.sub.

Abstract: A method and apparatus for controlling the sliver thickness variation in a carding machine. The thickness variation of the sliver delivered from the carding machine is measured and an electrical signal corresponding to the thickness variation of the carded sliver is issued. A difference signal is created by comparing the above-mentioned electric signal, and a control pulse signal in accordance with the difference signal is intermittently created at predetermined time intervals, each of said time intervals being shorter than a time required for a length of the carded sliver which length corresponds to a long term variation of the carded slivers thickness. The supply amount of fiber tufts to the carding machine is intermittently adjusted for reducing the above-mentioned control signal toward zero by said control pulse signal at each of said time intervals.

Abstract: A needle selection control apparatus for circular pattern knitting machines which controls the timing of selection of a series of needles mounted on a needle cylinder. Needle synchronizing signals produced by sensor means which senses each cylinder needle rotating with said needle cylinder are electrically processed so that input pulse signals are formed whose phases have angles of lead controlled by the apparatus in accordance with the number of revolutions of the needle cylinder, and the input pulse signals are also electrically processed so as to remove unnecessary contents of the signals due to the eccentricity of the needle cylinder therefrom. The input pulse signals thus obtained are supplied to needle selector means for actuating the same at very high rotating speeds of the cylinder without error.

Abstract: A synchronizing signal generator which supplies signals exactly synchronized with each of a series of needles mounted on a needle cylinder and rotating with said needle cylinder to actuate needle selector means of circular knitting machines with great accuracy, and includes first sensor means for producing signals synchronized with each cylinder needle rotating with said needle cylinder, second sensor means located in alignment with the first sensor means and for producing signals which represent the eccentric needle cylinder, difference operational circuit which processes those signals for difference operation, and a gain control circuit which controls the gain of the output of the difference operational circuit under the control of the signals produced by the second sensor means.