A quartz probe apparatus having a plurality of quartz probe bodies and a metal pattern layer formed on each of the quartz probe bodies. A plurality of quartz probe bodies integrally incorporate a microprobe portion including a number of microprobes corresponding to electrode arrays of an object of examination, a pattern wiring portion connected with the microprobe portion, and an electrode pad portion connected with the pattern wiring portion. A plurality of quartz probe bodies are formed by etc...

A transducer for measuring a moment force as a related function of pressure and tension where a spirally wound bourdon tube has a confined end arrayed to apply a moment force to pretensioned metal vibratory elements. The change in tension in the pretensioned vibratory elements produces a change in frequency which is related to pressure in the bourdon tube. The vibratory elements are maintained at equally applied tension so that a temperature change changes the frequency of the vibrating elements...

A quartz oscillator device of the present invention comprises a quartz oscillating plate having two major surfaces, each of which is formed with an excitation electrode and lead electrodes drawn out of the excitation electrode, and electrode pads formed on a base, wherein the quartz oscillating plate and the electrode pads are electrically connected via a silicone-based conductive adhesive. Among the excitation electrode and the lead electrodes, at least each of the lead electrodes comprises a C...

A quartz pipe joint of the present invention can be used in a connection of, for example, a quartz pipe and a quartz pipe, or a quartz pipe 7 and a synthetic resin tube. The quartz pipe joint A has a joint body having a tapered pressing face a cylindrical sealing member 33 having a tapered receiving face 33, a lock ring which can deform to increase its diameter and deform to reduce its diameter and which can be fitted into an annular groove of the quartz pipe and a nut. When the lock ring fitted...

A quartz crystal gas pressure sensor senses a range of pressures within a gaseous environment, such as from 0.1 millibar to 1 bar. The sensor includes a quartz crystal connected to manifest a piezoelectric effect upon excitation by an alternating electric field and communicating with the gaseous environment, an oscillator circuit connected to the quartz crystal for generating the alternating electric field and including a feedback circuit for providing a signal for self-excitation at the resonan...

A length-extentional quartz resonator has a pair of linearly arranged longitudinal oscillating portions supported to undergo dominant length-extentional oscillation having an oscillating frequency in the range from 1.04 MHz to 1.06 MHz. A rectangular frame member is arranged to support and surround the oscillating portions and has the outer overall length of 4000 .mu.m.+-.200 .mu.m. The frame member has a pair of longitudinal frame portions connected to the oscillating portions through transvers...

In a conventional quartz crystal resonator, a sacrificial quartz layer attached to the mounting posts and between the active, vibrating quartz layer and the package base reduces mechanical stresses on the active quartz layer caused by thermal expansion coefficient differences. The intermediate quartz layer is a sacrificial layer which acts to maintain the spacing of mounting posts.

A vacuum gauge for measuring pressure of environmental gas includes a quartz resonator disposed in the gas, and undergoing oscillation having a resonant frequency dependent on its body temperature which is dependent on relatively low pressure and having a resonant current which is dependent on relatively high pressure. Heat source is disposed adjacent to the resonator for supplying heat to the resonator so as to maintain the body temperature thereof and resonant frequency thereof according to th...

A crucible for melting a silica for fusion of said silica into a desired shape. The crucible having a main body with inner and outer surfaces comprised of a refractory material. In addition, at least a portion of the inner surface includes a barrier layer comprised of a material selected from rhenium, osmium, iridium, and mixtures thereof.

By forming corner parts of transparent quartz plates and the glass plate in rounded arc shape, in a mirror-surface finishing to accurate plane, polishing powder grain can flow out smoothly and evenly from all the periphery of the plates, and thus the surfaces of those component plates are finished to accurate plate of mirror-surfaces, without making a recessed part at their central parts which has been observed in the conventional plates of rectangular form, and hence, a quartz optical filter ma...