Abstract: One aspect of the present disclosure is a stand for supporting one or more panels of sheet material. The stand preferably includes a base portion configured to be disposed on and supported by a floor surface, an upright portion extending relative to the floor surface at a predetermined angle when the base portion is disposed on the floor surface, and wherein the upright portion and the base portion are configured to support the one or more panels of sheet material in a vertical orientation based on the predetermined angle.

Abstract: Washers partially coated with a thermochromic material are incorporated into bolted electrical connections to monitor or record temperature changes undergone by the electrical connections as indications of the performance or integrity of the electrical connections. For monitoring ongoing performance, the color changes undergone by the thermochromic coated washers can be compared to each other within a common field of view or to a common datum, such as a nearby thermochromic coated washer mounted in a bolted non-electrical connection. Irreversible thermochromic materials can be used to record elevated temperature events such as approaching or reaching a design temperature limit or a fault condition. Different thermochromic materials can be combined within the same washers to monitor different ranges of temperature or to record multiple threshold events.

Abstract: Washers partially coated with a thermochromic material are incorporated into bolted electrical connections to monitor or record temperature changes undergone by the electrical connections as indications of the performance or integrity of the electrical connections. For monitoring ongoing performance, the color changes undergone by the thermochromic coated washers can be compared to each other within a common field of view or to a common datum, such as a nearby thermochromic coated washer mounted in a bolted non-electrical connection. Irreversible thermochromic materials can be used to record elevated temperature events such as approaching or reaching a design temperature limit or a fault condition. Different thermochromic materials can be combined within the same washers to monitor different ranges of temperature or to record multiple threshold events.

Abstract: A data acquisition system senses current and voltage from a common electrical circuit supplying a power to load branch circuits containing loads that undergo changes in load condition, such as starting and stopping. Transmitters connected to the load branch circuits identify the loads that undergo load condition changes. A data processor receives information from both the sensors and the transmitters to link the sensed current and voltage information from the common electrical circuit to the particular loads that undergo changes in load condition.

Abstract: Directional control valves are arranged with restrictable center passageways connected in series to a fixed displacement pump and with restrictable power and exhaust passageways straddling loads connected in parallel to the same fixed displacement pump. Pressure responsive valves located between the loads and the restrictable exhaust passageways reduce interactions between the loads. Another pressure responsive valve located between the fixed displacement pump and the restrictable center passageways maintains an appropriate division of flow between the restrictable center passageways and the restrictable power and exhaust passageways.

Abstract: A power sensing regenerator includes a pair of displacers (24 and 26) connected in tandem for dividing a flow of fluid from a pump (12) into predetermined proportions for servicing one or more loads (42). Flow control valves (32 and 34) regulate respective flows from the displacers (24 and 26) to the one or more loads (42). A control system, which includes differential pressure regulators of the flow control valves (32 and 34), responds to a difference between discharge pressures of the displacers (24 and 26) for reducing discharge pressure of the pump (12).

Abstract: A regenerator for a fluid power system is arranged to control flow rates while converting pressure drops accompanying resulting changes in flow rates into useful work. A gang of displacers are incorporated into a fluid flow network that also includes an array of selectable flow paths through the displacers. A control system, responsive to changes in demand for the flow of fluid, selects among the flow paths to operate the displacers in various combinations as motors, pumps, and recirculators for dividing the flow of fluid into two variably sized portions. One portion of the flow is sized to match the demand for fluid flow, and the other portion of the flow is converted into useful work.

Abstract: A regenerator for a fluid power system is arranged to control flow rates while converting pressure drops accompanying resulting changes in flow rates into useful work. A gang of displacers are incorporated into a fluid flow network that also includes an array of selectable flow paths through the displacers. A control system, responsive to changes in demand for the flow of fluid, selects among the flow paths to operate the displacers in various combinations as motors, pumps, and recirculators for dividing the flow of fluid into two variably sized portions. One portion of the flow is sized to match the demand for fluid flow, and the other portion of the flow is converted into useful work.