Abstract: An apparatus is provided for processing toxic materials in a safe manner. Two access ports in the apparatus are used for introducing and withdrawing the materials. In the apparatus, two valves pass the materials through a vial for mixing with a stored toxic material and a column for processing.

Abstract: Materials are labelled with a radioisotope by passing them through a column packed with (a) beads coated with an oxidizing reagent for coupling the radioisotopes to the materials, (b) as anion resin, and (c) a material for trapping elemental isotope, and flowing a mixture of the radioisotope and a solution of the material to be labelled through the column.

Abstract: Materials are labelled with a radioisotope by passing them through a column packed with (a) beads coated with an oxidizing reagent for coupling the radioisotopes to the materials, (b) as anion resin, and (c) a material for trapping elemental isotope, and flowing a mixture of the radioisotope and a solution of the material to be labelled through the column.

Abstract: Apparatus for generating an enveloped tone signal includes a digital portion for generating an alternating logical wave form at the desired frequency, and a start pulse for initiating the tone; and an analog portion responsive to the alternating logical wave form and the start pulse for creating the tone, the analog portion including a capacitor responsive to the start pulse for storing a charge and a switching device connected to the capacitor and responsive to the alternating logical wave form for repeatedly bleeding off a portion of the charge from the capacitor in synchronization with the alternating logical wave form, and a transducer connected to the capacitor for producing the enveloped tone signal.

Abstract: A drain plug for sealing the waste and overflow drain assemblies during construction and system testing. A threaded bolt extends through a rubber washer. The bolt is screwed into a tapped hole in the shoe assembly of the drain, providing a secure plug that will not blow out during system testing. A sleeve may be employed on the bolt to allow ease of access to the bolt when deep drains are plugged.

Abstract: A ground fault accessory for a molded case circuit breaker is provided by converting a shunt trip accessory to automatically trip the breaker when a ground fault occurs. A printed circuit mounted in the housing with the shunt trip eliminates the need for a separate ground fault relay. The ground fault relay and the shunt trip are made available in the same accessory requiring no additional mounting of equipment or external wiring while conserving space which is scarce in load centers and other locations where both ground fault and shunt trip are desired.

Abstract: A decontamination apparatus comprising a decontamination chamber for holding and treating articles to be decontaminated, a lid arranged to provide access to the chamber for installing articles to be decontaminated and for removal therefrom, an ancilliary chamber containing decontamination fluid supply and control means for the decontamination chamber, the decontamination chamber comprising at least two regions so as to provide one relatively deep region wherein elongate articles such as elongate flexible breathing tubes can be suspended, and a second relatively shallow region wherein smaller articles such as breathing masks can be held or suspended, at least a lower portion of the deep region being defined by a trough into which decontaminating fluid can drain from the decontamination chamber, the decontamination chamber further including support devices for holding articles to be decontaminated, spray devices arranged in both decontamination regions for spraying decontamination fluid into or over articles ar

Abstract: Cable retractor adapted to support and guide a slack portion of a cable connected between a stationary rack and a chassis which is slidable out of the rack. The cable retractor has brackets fixed to the moving chassis and to the rack, arms pivoted to each bracket and to a common pivot plate and standoffs to attach the slack portion of a cable to the arms so that a bend portion of the cable is positioned in spaced relation from the pivotal linkage between the first and second arms. The pivot plate linking the first and second arms has pivots which are suitably spaced to restrict the minimum bend radius of the slack portion of the cable.

Abstract: A system for detecting intruder motion in selectable zones of a defined area is disclosed. The system is principally used as a line protector to detect intruders in the vicinity of a fence or wall and may be used as a virtual fence by employing a narrow-beam antenna and deep range coverage to detect an intruder crossing its line of sight. The system utilizes a transmitter for periodically sweeping the area to be protected and a receiver incorporating a narrow band filter which is variable to select a plurality of overlapping zones within the protected area, the presence of a reflective target in a selected zone resulting in a corresponding output signal. Means are provided to store such output signals from each zone and to compare received signals with previously-stored signals to detect differences in the target pattern of each zone.

Abstract: A system for detecting and counting entry and exit of passengers. Transmitted high frequency sound beams define at least two zones through which passengers pass in sequence when entering or leaving a vehicle; the motion of a passenger through the zones produces signals at a receiver which are fed to logic circuits to produce appropriate counts. The logic circuits discriminate between moving human targets and other moving objects within the zones, and include range discrimination to prevent interference from outside the detection area. In one embodiment the sensor is located above the entry area to detect passengers' heads, while another embodiment is located at a level to detect passenger foot motion.

Abstract: An intrusion detector operating with electromagnetic sensors to detect intruder motion within large, defined areas is disclosed. The system provides an acceptably low false alarm rate by means of range discrimination whereby moving objects outside the protected area do not affect the system and by improving sensitivity to slow-moving targets even when located very close to the sensor location. The system incorporates a transmitter which is frequency modulated by a triangular or sawtooth wave and a receiver which produces an output signal that varies in accordance with the instantaneous difference between the transmitted and received frequencies. The frequency of this difference signal is the beat frequency, and is proportional to the range of the target. Storage means are provided to permit comparison of successively received signals over a predetermined period of time, and this comparison serves to reveal slowly varying changes in the return signal pattern.