A strain transducer of the kind in which a plug is inset into a workpiece surface requires an accurate interface fit with a drilled hole. One method proposes an oversize hole (12) which first receives an annular insert (14) in whose aperture (15) the transducer plug is a precision fit. The outer cylindrical surface of the insert has axially parallel serrations (16) which bite into the sides of the hole. Another method also has an oversize hole (22) whose mouth is constricted by a cylindrical pun...

A strain gauge (10), comprising a silicon strain sensing element (14) for sensing strain with first and second load points (16) and provided with a pair of piezo-resistors (22) located between said load points such that, when said strain sensing element (14) is subjected to tension or compression at said load points, a first of said pair of piezo-resistors (22a, 22b) is subjected to compression and a second of said pair of piezo-resistors (22a, 22b) is subjected to tension, wherein a change in r...

A fixing member is composed of an upper washer and a lower washer; and a sensor substrate is sandwiched and held by the upper and lower washers. A strain-detecting element is disposed on the sensor substrate. A strain sensor as configured above is fixed onto a measurement target via the fixing member. Accordingly, the strain sensor does not generate an output signal when no external force is applied, demonstrating stable characteristics.

The elongation of a rope or cable under impact stress is measured by attaching a light emitting diode (LED) to a free-falling weight which loads the rope upon impact. The LED is turned on in response to a drive signal indicative of stress of the rope of greater than a given value. The lit LED and an adjacent scale are photographed to provide a record of the distance through which the LED moves, when on, and this indicates the amount of elongation of the rope to failure.

A strain relief for an electrical conductor cord is disclosed for distributing a bending stress acting on the cord. The strain relief includes a head portion and a flexible tail portion molded about a conductor having a major transverse axis of greater dimension than its minor transverse axis. A bending force acting on the cord in a direction to effect bending about a bend axis nonparallel to the major transverse axis of the cord induces both bending and torsional movement of the strain relief s...

A strain sensor providing an optical read-out that is suitable for use in electrically noisy environment or one subject to mechanical vibration consists of one or a set of single mode optical fibres wound round an expanding strain member. The principle of operation relies upon the fact that transverse straining of a single mode fibre destroys mode degeneracy thereby producing birefringence effects that can be rendered obversable using polarized light and a polarization analyzer.

New antibiotically active compounds having the basic structure of rifamycin S, namely 3-hydroxyrifamycin S (formula A: X=<C.dbd.O; R.sup.1 =OH; R.sup.2 =H), 3,31-dihydroxyrifamycin S (formula A: X=<C.dbd.O; R.sup.1 =R.sup.2 =OH) and 1-desoxy-1-oxarifamycin S (formula A: X=--O--; R.sup.1 =R.sup.2 =H) ##STR1## are formed by cultivating, under aerobic conditions, a strain of Nocardia mediterranei which is derived from Streptomyces mediterranei ATCC 13 685 as the parent strain and is character...

An improved strain relief device is disclosed for use in cooperation with a known electrical connector of the type having at least two parallel spaced rows of terminals separated by a slot. The subject strain relief device is snapped into the slot in the connector and has the conductors of the respective rows secured to the opposite sides thereof by means of a known bundle tie passing around the conductors and through a slot in the strain relief device.

A strain gage particularly suited for use in detecting and measuring mechanically induced strain in thermally strained specimens including an elongated link, adapted to be fixedly secured to the surface of a specimen, having thermal expansion characteristics matched with those of the specimen, and characterized by a differential capacitor employed for detecting strain induced motion as such motion is effected between the link and the surface of the specimen.

A strain relief bushing having camming strain relief means for grasping a cord located therein. The strain relief bushing may be rotatably engaged and disengaged. It may be applied to existing cord, located in an aperture for later cord application or applied contemporaneously therewith.