Abstract: A voltage verification unit and method for determining the absence of potentially dangerous potentials within a power supply enclosure without Mode 2 work is disclosed. With this device and method, a qualified worker, following a relatively simple protocol that involves a function test (hot, cold, hot) of the voltage verification unit before Lock Out/Tag Out and, and once the Lock Out/Tag Out is completed, testing or “trying” by simply reading a display on the voltage verification unit can be accomplished without exposure of the operator to the interior of the voltage supply enclosure. According to a preferred embodiment, the voltage verification unit includes test leads to allow diagnostics with other meters, without the necessity of accessing potentially dangerous bus bars or the like.

Abstract: A cylindrical heated airflow sensor for a constant temperature anenometer has a solid or tubular fused silica substrate with leads or terminals connected to each end. The sensor has a central heated section densely wound with resistive wire or covered with a resistive film, and an unheated section between the heated section and each terminal. Due to low heat conductivity of the substrate, the unheated section insulates the heated section from the terminals to improve the accuracy of the sensor at low airflow rates.

Abstract: A mass air flow meter has a time lag which varies according to the air flow rate. A digital filtering method enhances the raw meter output signal by calculating a correction term based on varying time constants which are dependent on the instantaneous raw signal. The correction term is added to the raw signal. Alternatively first and second order time constants are used to calculate first and second order correction terms.

Abstract: A two-piece device for holding a plurality of toothbrushes which comprises a wall mountable unit having the overall shape and configuration of a hemisphere, an arcuate recessed groove extending midway through the hemisphere and a general arcuate and planar rack member having openings for holding a plurality of toothbrushes, the rack member engages the arcuate recessed groove of the wall mountable unit.

Abstract: Hand-held and hand-operable powder dispenser having a container including a handle/nozzle section terminating at its discharge end in an unobstructed powder dipensing opening, a hand gripping section, and a central, flexible bellows section coupled between the handle/nozzle section and the hand-gripping section. The bellows section is adapted to be collapsed and expanded axially to serve as a pump. The inside diameters of the handle/nozzle section decrease substantially linearly and continually as a function of the length of the handle/nozzle section in a direction toward the powder dispensing opening. The ratio of the length of the handle/nozzle section to the greatest value of its inside diameter is substantially greater than 1.4.

Abstract: In one form, a safety lock for a knob operated door includes an anchor block fastened to the framing stud of door frame. A flexible steel cable loop having a pair of parallel end portions permanently mounted in the anchor block has a cylindrical shank tightly encompassing its parallel end portions, the shank being situated in adjacent relationship to the anchor block. A cylindrical sleeve encompasses the shank and is in rotatable and longitudinally slidable relationship with respect to it. The anchor block is so situated that, when the sleeve is in encompassing, overlying relationship to the shank, the cable loop will just barely fit over the maximum diameter of the knob. With the loop aligned with the reduced portion of the knob, the sleeve is slid toward the knob to reduce the size of the loop so it cannot come back over the knob. The sleeve and the shank are so positioned as to be in alignment with the vertical slot between the door and the door frame when the safety lock is operative.

Abstract: Exchanger means for exchanging a first fluid with a second fluid, in varying proportions and employs a first duct, carrying the first fluid, a second duct carrying the second fluid, and a transfer chamber connected to both ducts, through which some, or all of the second fluid is able to be transferred back into the first duct, and variable control means in the form of first and second damper blade means in the chamber which can be swung together, thus dividing the chamber and preventing transfer, and which may be swung apart to procure varying proportions of such transfer. The chamber also has inlet means for inlet of the first fluid and outlet means for discharge of the second fluid.

Abstract: A dispenser for dry powders, and in particular for fire extinguishing powders, formed as a container having a handle/nozzle section to be gripped by one hand, a hand gripping section to be gripped by the other hand, and a central bellows section for alternate axial compression and expansion to pump the powder from the container and thereby to discharge it in repeated cloud-like bursts. By regulating the quantity of powder in the dispenser and the powder dispensing opening it is possible to repeatedly discharge fire extinguishing effective amounts of a fire extinguishing powder. In one preferred embodiment the handle/nozzle section is configured as an elongated conical member.

Abstract: A container dispenser including a reversible pouring spout and closure which in one position provides a closure for the container and which in the reverse position provides a spout for pouring liquid from the container. The dispenser includes a collar with an internal, annular gasket, the collar being mounted to a wall of the container, and a dispensing spout having an outer threaded end portion threadable from either end into the collar. The spout has an open end and a closed end with a side opening spaced from the closed end, the threaded end portion of the spout extending on either side of the side opening. When the spout is threaded from either end into the collar, the threaded portion of the spout sealing engages the gasket with the side opening of the spout open to the container interior.