Abstract: A coil has one or more layers of primary and secondary windings about a bore liner, with the primary and secondary windings separated by a winding of glass threads. The coil is heated in an oven to first drive off the volatiles of the binder forming part of the ceramic insulation for the primary and secondary coils and which volatiles pass through the winding of glass thread. The coil is further heated so that portions of the glass fibers forming the threads vitrify with the non-vitrified remaining portions retaining their well-defined, discrete fiber characteristics, whereby they extend through the vitrified glass to seal the coil, reinforce the coil against vibration and shock, and enable a dimensionally compact coil.

Abstract: A monolithic resonator structure for a vibrating beam force sensor, comprising an accelerometer and pressure transducer, is provided which comprises an outer structure including a mounting structure, a force transfer structure, a plurality of flexure beams extending between the mounting and force transfer structures; and an inner structure including a vibrating beam extending between the mounting structure and the force transfer structure. The monolithic resonator is non-planar in that the outer structure has a thickness greater than said inner structure.

Abstract: A monolithic resonator for a vibrating beam accelerometer is provided which comprises an outer structure including a mounting structure, a proof mass structure, a plurality of flexure beams extending between the mounting and proof mass structures; and an inner structure including first and second isolator masses, first and second isolator beams connected to one portion of the isolator masses, respectively, and a vibrating beam extending between other portions of the isolator masses. The monolithic resonator is non-planar in that the outer structure has a thickness greater than said inner structure.