A printed circuit board (PCB) having an integrated strain gage. In one embodiment, a PCB includes a component footprint suitable for mounting an electronic component. A strain gage is integrated into the PCB in a location under the component footprint. The strain gage includes at least one electrical conductor that is accessible for resistance measurements.

A strain gage or a measuring transducer equipped with such a strain gage has, for supporting the measuring grid structure, a backing made of a polyphenylenesulfide film. Such a backing assures a plurality of desirable characteristics simultaneously and equally well for each characteristic.

The strain-wave transmission according to the invention is provided, for purposes of sealing between input and output parts on both sides of the strain-wave generator, with an overlying cup-shaped jacket which is stiffened from within against bulging by a likewise cup-shaped support member open toward the pressure side. For the purpose of sealing, the frontal edges of the strain wheel and of the support members are nonrotatably and sealingly interconnected and the input-side support member is fl...

An SOI substrate includes a thin diaphragm portion that is formed by removing a portion of the substrate from a rear surface side, and a thick outer frame portion that surrounds the diaphragm portion. A piezoresistive element that outputs an electrical signal in response to pressure is formed on the diaphragm portion, and an electrode that extracts the electrical signal from the piezoresistive element is formed on the outer frame portion. The electrode is disposed at a position on the outer fram...

A terminal and a method for making a terminal that includes a connector end and a terminal barrel, preferably formed from a sheet of metal. The terminal barrel includes a cylindrical wall having a first section corresponding to a first end and a second section corresponding to a second end. The thickness of the first section is reduced so that it is less than the thickness of the second section and the first section is flared to increase the diameter. The first end is flared after a nylon or pla...

A family of glasses from the rare earth alumino-silicate (RE.sub.2O.sub.3--Al.sub.2O.sub.3--SiO.sub.2) ternary system exhibiting high strain point and low liquidus temperatures; preferably the La.sub.2O.sub.3--Al.sub.2O.sub.3--SiO.sub.2 ternary system. The glasses are excellent candidates for electronics applications and have the following composition, expressed in mole percent and calculated from the glass batch on an oxide basis: 60-85% SiO.sub.2, 10-25% Al.sub.2O.sub.3, and 4-15% RE.sub.2O.su...

An optical fiber strain sensor is provided which remembers the maximum stn a structure has experienced in a given timeframe. A pair of multi-mode optical fibers with flat ends meet end-to-end within a microbore capillary tube with which the fibers have frictional contact. The fibers are fastened to the structure at two points a known distance apart on either side of the capillary tube. Increasing strain in the structure pulls the fiber ends apart in proportion to the amount of strain; however, w...

A foil strain gage or a transducer or load cell with such a strain gage has a backing to which a resistor grid is bonded, made of polyaryletherketone and preferably also a cover of polyaryletherketone.

A strain gage force measuring transducer is described in which distortion of measurements of a given strain on a given surface due to the interaction between the given strain and a second strain is eliminated by making a combined measurement of both strains on that same surface, equating the measured value of the second strain with the value of the distortion, and entering the so measured and equated value of the second strain into the combined measurement with a sign opposite to the sign of the...

A strain-limiting fastening apparatus for containing a source of potential energy in entrapped relation between a pair of axially separable members includes a plurality of fasteners securable to one of the members for substantially axially holding the other member thereto in opposition to the source of potential energy, and a plurality of stops on the other member for limiting the degree of maximum axial adjustment of an individual fastener to a predetermined incremental amount until all of the ...