Abstract: In a system for evacuating fluids having vapor and gaseous phases, including a liquid ring pump, the seal liquid for which is provided in a closed system and is cooled by a heat exchanger through cooling liquid fed to the heat exhanger from outside the system, means are provided for diverting the seal liquid through a chiller when the temperature of the cooling liquid approaches the temperature of the gas/liquid mixture entering the pump. The chiller maintains the seal liquid temperature below the temperature of the cooling liquid in the heat exchanger and the cooling liquid is used in the chiller to receive the heat rejected from the seal liquid.

Abstract: In a two-stage liquid ring pump, gas leakage from the high pressure to the low pressure side of at least the first stage is substantially reduced and gas leakage from the second stage to the first stage is substantially reduced or eliminated by providing an annular seal member in the clearance between the first stage port plate adjacent the second stage and the adjacent end of the first stage rotor hub and supplying sealing liquid under pressure at least equal to the pump discharge pressure to substantially fill the portion of the clearance bounded by the annular seal member.

Abstract: One or more computational parameters in a digital weighing scale can be varied by the user of the scale. The normal digital display of the scale is used to successively display a plurality of messages indicating the parameters or parameter values selectable by the user, and the user selects the desired parameter or parameter value by operating one of the normal scale controls during display of the message indicating the desired parameter or the desired parameter value.

Abstract: Discharge or unloading orifices are provided in both stages of the two stage pump to bleed seal liquid under various vacuum conditions and to render the pump immune to the effects of variation in rotor speed and in the delivery rate of seal liquid.

Abstract: A high capacity evacuation system employing a precondenser receiving process fluids having liquid and gaseous phases, a first stage jet diffuser and a second stage liquid ring pump for handling the process fluids and in which system the motivating fluid for the jet diffuser is air; seal liquid is continuously fed from a seal liquid source outside the system; and the piping between the components of the system is unobstructed.

Abstract: A piece of machinery which, in an abnormal operating condition exhibits a vibration frequency characteristic of or peculiar to that condition, is monitored by securing a spring and mass unit to the machinery, the spring and mass unit having a natural frequency equal to said vibration frequency so that upon the occurence of the abnormal condition the magnified vibration of the spring and mass unit can be used to effect a control function or sound an alarm.

Abstract: A multiple fuse device having a multiple fuse assembly within the device rotatable about an axis in fixed directions through at least a certain predetermined angle and having at least two rotational positions in which at least one fresh fuse is connected between an electrical source and a load circuit, the improvement characterized by the assembly having a body with a conductor carrying portion having a plurality of radially extending angularly spaced apart separate conductors carried by said portion, at least three adjacent ones of said conductors being connected in a set in series each to its adjacent conductor by fuse means and at least one of the conductors in this set being connected with the source and an adjacent conductor simultaneously being connected with the load circuit to fusibly connect one line of the load circuit with the electrical source when the assembly is in a selected rotational position.

Abstract: A method of producing textile-like non-woven essentially binderless webs from fiber furnishes at least about 70% of which comprise man made non-fibrillatable low denier fibers having no large area flat surfaces and which are at least about 1/4 inch in length with a length to diameter ratio of between about 400:1 and 700:1. The method includes a wet laying system in which sufficient wetting agent is added to the water used in dispersing the fibers to wet the fibers completely and reduce the surface tension of the water to between about 30-35 dynes. It also includes agitating the dispersion vigorously to create tumbling water surface conditions in which up to, but less than about 4% by volumeof air is entrained in the water in the form of tiny air bubbles to create a water/air emulsion in which the fibers are dispersed without generating any substantial amount of surface foam.

Abstract: A method for winding wire strands onto toroidal cores in which a length of wire is fed along a radially inwardly facing channel in an arcular guide to form a loop. As the leading end of the wire completes this loop it hugs the channel's radial boundary to form a second loop radially inside the first as the wire feeding continues. A gap is provided in the radial boundary of the channel for receiving the core with the core's central aperture in this gap so as each loop is formed the wire in that loop passes through the core. The upper and lower boundaries of the channel are spaced apart so as to maintain the loops in a single concentric layer around the guide and through the core. When enough wire has been fed the feeding is stopped, but the movement of the loops around the guide continues and winds (tightens) at least one new turn of wire onto the core for every complete circulation of the loops around the guide.

Abstract: The disclosed apparatus includes a resectoscope with a novel working element stem, a novel cutting electrode for use with the stem and novel electrical features including a dielectric moving block element for reciprocating the electrode. The stem portion of the working element has a telescope channel member with a central axis and a pair of cutting electrode guide channel members spaced apart and mounted on opposite sides of the telescope channel member above its central axis. The cutting electrode consists of a single length of electrically conductive wire with a loop portion in the middle of the wire and a pair of substantially straight, flexible, parallel, spaced apart insulation covered arms having similar lengths and extending rearwardly from the loop in the same direction. The arms of the electrode are inserted within the cutting electrode channel members in the working element stem.