A quartz oscillator temperature sensor which measures temperature based on the change in resonance or oscillation frequency of a quartz oscillator with the change in temperature the oscillator can be constructed by cutting a piece of quartz from a wafer with a thickness of about 80 to 150 .mu.m by rotating the plane of the crystal defined by the electrical and mechanical axes 15.degree. to 25.degree. about the electrical axis and then forming the wafer into a quartz tuning fork. The tuning fork ...

The invention provides an improved apparatus for supporting a workpiece during the manufacturing process involving the workpiece. The apparatus includes a holding device for maintaining the workpiece in a predetermined orientation during performance of the manufacturing process. The holding device includes a plurality of members. The improvement comprises at least one member of the plurality of members including a plurality of indicators arranged in a predetermined order to establish an identify...

A shock absorbing insert for protecting a fragile quartz crystal includes a Teflon carrier with sloping walls which carries a number of dimple or rib shaped springs. These springs have varying spring rates increasing as they get farther from the base. The carrier is supported by a cushion spring system having a lower spring rate than that of the dimple or rib springs. This structure allows the force of mechanical shock to be distributed across the entire surface of the crystal rather than being ...

A sensor device has a quartz tuning fork and an analysis circuit arranged on a common board inside a common housing. The quartz tuning fork has its own, second housing within the common housing for acoustically decoupling the tuning fork from the analysis circuit. The second housing also has an opening for equalizing the pressure and temperature between the second housing and the rest of the common housing. The analysis circuit, which is connected via the electrical wires to the quartz tuning fo...

A temperature-compensated quartz oscillator having a first plate of quartz that carries a first electrode which displays a sensitivity to temperature that exceeds that of the piezoelectric quartz wafer which comprises a first resonator which vibrates at a reference frequency f.sub.M. The first plate cooperates with the first electrode and a third electrode to form a second quartz resonator. Means for applying to the first and third electrodes an excitation electric power to drive the active port...

This invention concerns itself with a method for producing single crystal, seed material for use in growing synthetic quartz crystals. This seed material comprises a Z-faced seed crystal cut or sliced from the X-plus growing region of a synthetic quartz, single crystal boule.

Quartz crystal vibrators of small size which vibrate in the shear mode consist essentially of a vibrating portion and a support portion, both of which lie in the same plane. As a consequence, they are readily manufactured on a production basis and can be shaped so as to minimize the effect of variation in ambient temperature.

Since etching of a crotch portion of quartz vibrator defined by segment 18, first segment 13, and second segment 17 advances in accordance with the crystal orientations of quartz, the shape of side surfaces of two quartz vibrating bars opposite to each other with this crotch portion in between can be made symmetric, whereby stress applied on the two quartz vibrating bars can be equalized.

A quartz crystal resonator is provided in which a simple rectangular quartz crystal is cut at the respective corners thereby to have a wedge shape in cross section at the respective corners, and the length and thickness of the quartz crystal resonator along the line connecting the centers of the respective opposite sides thereof are the same as those of the rectangular quartz crystal.

A mounting adapted to support and provide a two-terminal connection to a flexural mode quartz crystal vibrator having two opposed surfaces with two electrodes disposed on at least one of the opposed surfaces is provided. The mounting includes a non-conductive member having first and second spaced apart conductive surfaces, the non-conductive member having a lesser thermal coefficient of expansion than the quartz crystal vibrator. At least one metallic plate is disposed between one of the conduct...