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JPH02146344U |
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JPH0251209B2 |
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JPH02269928A |
PURPOSE:To reduce the noises of an instrument and to improve the measurement accuracy by allowing a vibration beam to oscillate itself at its natural vibration frequency in a nonlinear vibration area. CONSTITUTION:The vibration beam 2 is...
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JPH02266242A |
PURPOSE: To provide an inexpensive tuning fork quartz pressure gauge which is constructed in a solid structure, can limit the influence of interference, and can measure pressure with high accuracy by providing a mounting and supporting s...
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JPH0248852B2 |
The electric field detecting member includes a Pockel's cell made by appropriate cutting of a quartz crystal in that direction which avoids the piezo-electric phenomena. The light from the laser light source is applied to the electric fi...
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JPH02128549U |
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JPH02128550U |
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JPH02257030A |
PURPOSE:To improve the magnetic shielding effect, to take a stabilized measurement at all times even in a magnetic field environment and the ionization vacuum gage by using a superconductor as the shielding material. CONSTITUTION:A B-A-t...
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JPH02254333A |
PURPOSE:To obtain a highly accurate Penning gage by providing a switching means for both resistors of a discharge resistor and a low-voltage discharge resistor which is provided in parallel with the discharge resistor. CONSTITUTION:A swi...
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JPH02245632A |
PURPOSE:To measure the intensity of a molecular beam, by a method wherein a bias voltage is applied between a probe at one end of a cantilever and a substrate to let a tunnel current flow, and the tip of the lever is irradiated with the ...
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JPH0237056B2 |
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JPH02208531A |
PURPOSE:To enable the measurement of an average vacuum of a laser optical path as well as that in a specified area by adjusting a plurality of laser light so that it has the same optical axis to measure intensities of transmission light ...
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JPH02183135A |
PURPOSE:To enable measurement of intensity of a molecular beam in a fine area without requiring correction by measuring a change in a voltage applied to a piezo-electric ceramics element to determine a deflection of a metal foil by a mol...
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JPH02138843A |
PURPOSE:To maintain a prescribed negative pressure by a method wherein a negative pressure generated in a piping for generating a reference vacuum pressure is measured to control a flow rate of a gas with a regulation of a flow regulatin...
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JPH02130440A |
PURPOSE:To achieve a fast detection of vacuum breaking by mounting a thin film conductive pattern on an X rays transmission diaphragm to break the X rays transmission diaphragm by a change in an electric resistance value of the pattern. ...
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JPH0218384B2 |
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JPH0255146U |
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JPH0262929A |
PURPOSE:To attach/detach a gauge head without admitting air to a vacuum device by providing a housing which has a vacuum gauge head fitting hole, an air intake, and an air discharge path for vacuum device fitting, an air discharge valve,...
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JPH029294B2 |
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JPH0232030U |
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JPH0220133U |
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JPH024856B2 |
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JPH021255B2 |
A rotary measuring body for a gas-friction vacuum meter has its surface formed with a macroscopic roughness which provides a gas-friction coefficient minimally affected by the microscopic roughness of the surface. As a result, the output...
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JPH01313728A |
PURPOSE:To measure pressure from low one to ordinary one with one temperature sensitive crystal resonator by utilizing the temperature sensitive crystal resonator as a heat conductive type pressure sensor in a low pressure area and utili...
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JPH01312438A |
PURPOSE:To decrease heating electric power and to enhance stability in pressure measurement by arranging heat sources on a quartz resonator having a temperature sensitive characteristic. CONSTITUTION:A temperature sensitive quartz resona...
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JPH01311241A |
PURPOSE:To realize a high-sensitivity and high-stability pressure sensing crystal sensor by reading variation in air pressure as variation in the frequency of a crystal oscillation circuit. CONSTITUTION:A crystal temperature sensor 1 whi...
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JPH01301993A |
PURPOSE: To carry out vacuum measurement with molecular density at a high level by installing a filament and an ion collector inside the spatial portion in a circumferential groove provided on the rotary cylinder side of a screw pump. CO...
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JPH01301136A |
PURPOSE:To reduce a cost, to make compact and to improve a reliability by making three phases of detectors en bloc, providing an input part to make plural detectors en bloc and monitoring plural vacuum breakers en bloc. CONSTITUTION:When...
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JPH0138512Y2 |
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JPH01277698A |
PURPOSE: To make a working mode in an optional state selectable by making a second mounting part of a second vacuum pump free of attachment or detachment to or from a first mounting part of a first vacuum pump. CONSTITUTION: A mounting h...
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JPH0151011B2 |
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JPH01262432A |
PURPOSE:To remove reactive gas completely, to prevent corrosion in an instrument, and to improve the life of the instrument by admitting inert gas whose flow rate is controlled to between a diaphragm for pressure measurement and a baffle...
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JPH0134107Y2 |
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JPH01227033A |
PURPOSE:To detect the degree of vacuum inside a sealed bottle, by impressing a high voltage on the sealed bottle so that a discharge pulse be generated therefrom, and by measuring a time required from the start of discharge to the genera...
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JPH01210834A |
PURPOSE:To obtain a highly stable vacuum gauge by simple constitution by using a crystal resonator whose frequency is varied sensitively by a temperature, as a pressure sensor. CONSTITUTION:A crystal temperature sensor 1 and a filament 3...
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JPH0138257B2 |
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JPH01118337U |
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JPH0133015B2 |
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JPH01100361U |
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JPH01143928A |
PURPOSE:To reduce variance in measurement sensitivity by arranging a cylindrical spiral, or cage-shaped auxiliary electrode outside a grid and a filament. CONSTITUTION:An ion collector 13 which extends into a glass pipe 11 having an open...
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JPH0167544U |
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JPH01110232A |
PURPOSE:To enable the measuring of friction purely attributed to a gas viscosity while eliminating a mechanical friction, by mounting a blade and a disc made of non-magnetic material on a disc comprising a superconductive material to mea...
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JPH0121573B2 |
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JPS6474428A |
PURPOSE:To measure pressure which is not affected by variation in gas temperature by providing a temperature compensating means which compensates a pressure measured value from a pressure measuring means utilizing heat conductivity accor...
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JPH0115009B2 |
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JPS6438547U |
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JPH0113622B2 |
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JPH0113621B2 |
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JPS6434536U |
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JPS6433639U |
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