61results about How to "Accurate diameter" patented technology

A resonant tunneling diode, and other one dimensional electronic, photonic structures, and electromechanical MEMS devices, are formed as a heterostructure in a nanowhisker by forming length segments of the whisker with different materials having different band gaps.

The present invention provides a tampon pledget with one or more of the following properties: increased absorbency rate; high absorbent capacity and fluid retention; rapid expansion potential; and ease of ejection of the pledget from the applicator. Surprisingly, the one or more properties are achieved by using a modified dual cross-pad, folded, compressed tampon pledget design.

An endodontic probe system comprises a measuring kit of a plurality of flexible rods for insertion as probes into a root canal for determining the apical aperture diameter. Each rod has a tip end with a diametrally enlarged end ball structure so that a user obtains a precise tactile sensation when passing the end ball through the apical aperture. A variety of different end ball shapes are disclosed. Measurement of the apical aperture diameter is important to determine so that the root canal may be properly and entirely cleaned without unnecessary reaming or enlarging the diameter of the apical aperture.

From a light source (51), light beams (57) are directed tangentially through the hook body (17), the hook base (27), and the bobbin case (28), onto a light receiver (53). Using the time (t) or the position of angular rotation of the hook body (17) at the impingement of the first light beam (57), the diameter of the bobbin packing on the lower thread bobbin (29) can be calculated.

A multilayered gas sensing element includes a solid electrolytic substrate. A measured gas side electrode and a reference electrode are provided on surfaces of the solid electrolytic substrate. The measured gas side electrode is provided in a measured gas chamber. An introducing hole forming layer has an introducing hole for introducing a measured gas from an ambient atmosphere into the measured gas chamber and also providing a diffusion resistance to the measured gas introduced into the measured gas chamber. In manufacturing this gas sensing element, the introducing hole is formed by performing laser irradiation applied to the introducing hole forming layer.

A transparent tube is placed in a parallel laser light beam emitted from a light projector and reaching a photoreciever, and a detection signal indicating an amount of light received corresponding to a width direction position of the parallel laser light beam is obtained from the photoreceiver. Peaks formed in the detection signal by beams reflected by an inner circumferential surface of the transparent tube and incident to the photoreceiver are detected; width direction positions of two intersection points where the peaks cross a predetermined threshold value are detected; the width direction positions of the light beam reflected by the inner circumferential surface of the transparent tube are calculated from an average value of the two intersection points; and an internal diameter of the transparent tube is measured from the width direction positions.

A feeding apparatus comprises a rotatably supported turret arm for supporting a new web roll and an old web roll, and a turret arm turning motor for rotating the turret arm, and splices a web of the new web roll to a web of the old web roll, thereby continuously supplying a web. The feeding apparatus further comprises a web roll diameter measuring distance meter, provided at a position opposed to the circumferential surface of the new web roll when the new web roll stops at a diameter measuring position, for measuring the distance to the new web roll; and a control device for determining the diameter of the new web roll in accordance with an output from the distance meter, and driving the turret arm turning motor in accordance with the determined diameter of the new web roll to move the new web roll to a splicing standby position.

A flow control device (30) comprises a body (32) having an inlet (38), an outlet (40) and a passageway (36) therebetween. A wire (42) is positioned in the passageway (36) and a retaining means (44, 46) is provided for maintaining the wire (42) in the passageway (36).

An apparatus for inspecting a function of an endothelium of a blood vessel of a living being, by stopping, using an inflatable cuff wound around a forearm of the living being, a flow of blood in a blood vessel of the forearm, subsequently ending the stopping of the flow of blood, and causing an ultrasonic probe placed on a skin of an upper arm of the living being to emit, from an emission surface thereof, an ultrasonic wave toward a blood vessel under the skin, the apparatus including an elbow-portion support member which supports an elbow portion of the living being; and a hand-dorsal-portion support member which supports a dorsal portion of a hand of the living being and which cooperates with the elbow-portion support member to keep, in a space, the inflatable cuff wound around the forearm of the living being.

An objective lens for a plurality of types of optical discs is provided with a diffracting structure on at least one surface thereof. The surface includes an inner area including the optical axis and an outer area. The outer area includes at least one special annular zone. Part of a first beam (having a first wavelength for a first optical disc of lower data density) passed through the zone will be substantially in antiphase with part of the first beam passed through the inner area. The convergence angle θ of part of the first beam incident on the outermost part of the inner area measured after emerging from the objective lens and a design numerical aperture NA_ref of the first optical disc satisfy:

1.0<sin θ/NA_ref<1.1.

The effective NA of the objective lens for the first beam is substantially equal to the design numerical aperture NA_ref.

One can impart outstanding resistance against collapse under pressure to gas-filled microvesicle used as contrast agents in ultrasonic echography by using as fillers gases whose solubility in water, expressed in liter of gas by liter of water under standard conditions, divided by the square root of the molecular weight does not exceed 0.003.

A system and method are described for ballizing and measuring a workpiece bore hole. In one embodiment, a ballizing unit having a distal end removably coupled to a ballizing member moves the ballizing member from a first position within the bore hole to a second position. A metrology unit having a distal end removably coupled to the ballizing member moves the ballizing member from the second position back to the first position. A sensor detects a force exerted on the ballizing member by the workpiece at a third position, which is located between the first and second positions.

One can impart outstanding resistance against collapse under pressure to gas-filled microvesicle used as contrast agents in ultrasonic echography by using as fillers gases whose solubility in water, expressed in liter of gas by liter of water under standard conditions, divided by the square root of the molecular weight does not exceed 0.003.