초록 ▼

One electrode of the probe is its tubular outer sleeve (3), and the other is its central rod (4). The insulators (9,16) separating the two are attached rigidly to the central rod, whereby the outer sleeve may slide off the probe for cleaning and servicing purposes. The outer sleeve is held in place

One electrode of the probe is its tubular outer sleeve (3), and the other is its central rod (4). The insulators (9,16) separating the two are attached rigidly to the central rod, whereby the outer sleeve may slide off the probe for cleaning and servicing purposes. The outer sleeve is held in place simply by friction from the O-ring seals (12,30). When the sleeve is removed, the central rod, insulators, etc., remain as a structurally complete sub-assembly. Electrical contact with the outer sleeve is made through an expandable canted coil spring (20), mounted on an insulator. The central rod is formed with a massive center section (7), for weighting the probe. The probe is supported on a graduated tape (36), in which are embedded the electrical leads (38) to the probe. The leads are securely attached and sealed in place by means of heat-shrinkable material (50), which is wrapped around the leads, heat-shrunk, and compressed into a pocket (27).

대표청구항 ▼

Liquid sensing apparatus, wherein: the apparatus includes two electrodes, and the apparatus is of the kind in which, when the electrodes are in the liquid, the liquid provides a conductive path between the electrodes; the apparatus includes an insulator means, which is effective to hold the two elec

Liquid sensing apparatus, wherein: the apparatus includes two electrodes, and the apparatus is of the kind in which, when the electrodes are in the liquid, the liquid provides a conductive path between the electrodes; the apparatus includes an insulator means, which is effective to hold the two electrodes electrically apart during operation of the apparatus; one of the two electrodes, termed the central electrode, is elongate and rod-like in form; the other electrode, termed the sleeve electrode, is hollow-cylindrical, and surrounds the central electrode along its length; the apparatus includes a means by which the insulator means and the central electrode are attached firmly and rigidly to each other, and together form a sub-assembly; the sleeve electrode is mountable upon, and separable from, the sub-assembly; the said means by which the insulator means and the central electrode are attached to each other is such that the central electrode and the insulator means remain attached rigidly together even when the sleeve electrode is separated from the sub-assembly; the sleeve electrode is separable from the sub-assembly by virtue of sliding the sleeve along sub-assembly, in the direction along the length of the central electrode; and the sleeve electrode is mounted upon the sub-assembly, the mounting being such that the sleeve electrode remains firmly attached to the sub-assembly during normal operation of the apparatus, and also being such that a person may slide the sleeve electrode along the sub-assembly by grasping the sleeve electrode in one hand and the sub-assembly in the other hand.