Abstract: A method and apparatus for detecting presence of liquid in a pathway of known volume feature a molding with a sample receiving port, a pump connection port, at least one sample treating chamber and optionally at least one optical measuring chamber located between the sample receiving port and the pump connection port. The sample receiving port and the treating chambers are connected with each other through a pathway, which passes through the liquid detecting part, that has at least one air hole that is controlled to be in an open or closed state in response to the presence of liquid detected by the liquid detecting part. A sample is quantitatively fed from the sample receiving port into a sample treating chamber. Detection of the liquid involves projecting a light beam at an incident angle in a range of 42.degree. to 62.degree.

Abstract: In a method of measuring optical characteristics of a component in a liquid impregnated in a porous material with no affection by the porous material, a light beam having an absorbable wavelength which is absorbed by the component in the liquid and a light beam having a wavelength which is longer than the absorbable wavelength are projected to the porous material, and a quantity of light having the wavelength which is absorbed by the component in the liquid is compensated by a quantity of transmitted light having the wavelength longer than the absorbable wavelength.

Abstract: The biological fluid analyzing device for analyzing biological fluid by measuring optical characteristics of a sample has a sample receiving port 1 and a pump connection port 5. Between the sample receiving port 1 and the pump connection port 5, the analyzing device has either a combination of at least one sample-treating chamber 2a, 2b, 2c and at least one optical-measuring chamber 3a, 3b, or a combination of at least one sample-treating chamber, at least one optical-measuring chamber and at least one waste liquid reservoir 4. The sample receiving port 1 is connected with one sample-treating chamber; the pump connection port 5 is connected with a pathway 6 or waste liquid reservoir 4; and the sample-treating chamber and optical-measuring chamber are interconnected with the pathway, or the sample-treating chamber, optical-measuring chamber and waste liquid reservoir are interconnected with the pathway.

Abstract: A dc brushless vibrator motor employs a cylindrical coreless stator winding unit having at least three stator coils arranged at about an even pitch angle and a rotor that includes an axially extended eccentrically-weighted permanent field magnet that is magnetized so as to have alternate north and south poles about the rotational axis of the rotor. A cross-section of the field magnet in a plane perpendicular to the rotational axis has generally an arcuate or sectorial shape which is within an angular range of 180.degree. to 270.degree. about the rotational axis. The center of mass of the rotor, therefore, is off the rotational axis, thereby causing vibrations.

Abstract: A dc vibrator motor has a generally cylindrically-shaped magnetically conductive case, a ring-shaped permanent field magnet, and an armature rotor including a shaft. The field magnet has at least four and at most eight alternate north and south pole sections arranged at an even angular pitch coaxially with the shaft. The armature rotor has at least three armature poles having an angular interval of 60.degree. between adjacent poles and at most six armature poles having an angular interval of 30.degree. between any pair of adjacent poles and at least six and at most twelve commutator segments arranged at an even angular pitch coaxially with the shaft. A pair of commutator brushes have an angular interval of at least 45.degree. and at most 90.degree. . Since all of the armature poles are situated within an angular range of 180.degree. about the shaft, the center of mass of the rotor is radially off the shaft, thereby causing vibrations.

Abstract: A small dc vibrator motor for use in a wireless alerting device includes a housing, a non-rotatable shaft fixed to the housing, a cylindrical magnet fixedly mounted on the shaft, and a rotor which is rotatably mounted on the shaft. The rotor includes a cylindrical coreless winding assembly between the magnet and the housing, and eccentric bearings, or combinations of concentric bearings and eccentric weights, on both ends of the winding assembly. The eccentric bearings, or the combinations of concentric bearings and eccentric weights, cause vibrations when the rotor rotates.

Abstract: A flat coreless vibrator motor includes a casing for housing the motor, a shaft rotatably supported by the casing, a rotor mounted on the shaft and being generally in the shape of a sector, the shaft being disposed at the center of a circle, along which a generally arc-shaped outer periphery of the sector generally extends. At least three armature coils are provided on the rotor and are angularly arranged in such a manner that these armature coils do not overlap each other. A magnet is mounted on the casing so as to generate a magnetic flux. A commutator and brushes cooperate with each other to supply electric power to the armature coils. Since the rotor is eccentric, vibrations are produced during the rotation of the rotor.