摘要:
Detection of liquid leaks and other changes in variables is disclosed. The event causes two elongate conductors to become electrically connected at a location which is determined by the event, thus creating a system in which the connection point can be located by measuring the potential drop from one end of one of the conductors (called the locating member) to the connection point. The system comprises a balancing component so that its sensitivity is not dependent on the location of the event along an elongate path. A fixed current flows through the connection, so that the result is independent of the resistance of the connection. The locating member can be a continuous resistive wire, coated with a conductive polymer; such a locating member can form part of a sensor cable in which the elongate components of the circuit are in a wrapped configuration. Alternatively the locating member comprises a plurality of discrete resistors. The system is arranged so that only connections within a certain range of resistance will activate the system. The voltage drop is calculated by comparing it to the voltage drop over a resistor of known size. Particular event-sensitive connection means are employed for the detection of hydrocarbons.
摘要:
An elongate sensor for detecting and locating presence of a liquid, e.g. water or a hydrocarbon. The sensor includes first and second elongate members which are spaced apart from each other and each of which is a metal conductor covered by a conductive polymer; a third, insulated elongate conductor; and an elongate insulating core. At least one of the elongate members is helically wrapped around the core. Presence of the liquid at any point along the length of the sensor causes the first and second members to be electrically connected at that point, creating a system in which the potential drop down one of the members can be measured and the location of the connection determined.
摘要:
Detection of events, e.g. liquid leaks and other changes in varibles. The event causes two conductors to become electrically connected, and thus creating a system in which the connection point can be located by measuring the potential drop from one end of one of the conductors (called the locating member) to the connection point. Preferably a fixed current flows through the connection, so that the result is independent of the resistance of the connection. The locating member can be a continuous resistive wire, preferably coated with a conductive polymer; such a locating member can form part of a sensor cable in which the elongate components of the circuit are in a wrapped configuration, or part of a cable in which the conductors are separated by a member shaped to prevent capillary action of a liquid from connecting the conductors. Alternatively the locating member comprises a plurality of discrete resistors. Preferably the system is arranged so that the sensitivity of the system is not dependent on the location of the fault and/or is such that only connections within a certain range of resistance will activate the system. The voltage drop is preferably calculated by comparing it to the voltage drop over a resistor of known size. Particular event-sensitive connection means are preferably employed for the detection of hydrocarbons and for the detection of acids.
摘要:
Corrosion protection systems which make use of a barrier which is placed between a corrodible substrate and a counter-electrode. The barrier can provide more uniform current distribution on the substrate, and/or enable the counter-electrode to be more easily maintained or replaced, and/or reduce the rate at which the current density on an elongate electrode changes with distance from the power source, and/or provide a controlled environment around the electrode to improve its efficiency.
摘要:
A pedestal comprising a pedestal base whose upper surface defines at least two pairs of open channels. Each pair of open channels is sized and spaced so that a support member of constant cross-section can be slidably fitted into the pair of channels. The pairs of channels are positioned so that, when a straight support member is fitted into each pair of channels, all the support members are parallel to each other and form a platform for supporting objects. The pedestals are particularly useful in the catering and hospitality industry for supporting food and beverage containers, tableware, flower vases and sculptures.
摘要:
A pedestal which comprises a horizontal component and one or more vertical components which fit into open channels or fit over straight projections in the upper surface of the horizontal component. The pedestals are particularly useful in the catering and hospitality industry for supporting food and beverage containers, tableware, flower vases and sculptures.
摘要:
A guiding catheter has incorporated toward its distal end, a flexible member capable of non-uniform elongation to cause the distal end portion to bend and straighten as desired so that it can be maneuvered through and accurately positioned in a tortuous, non-linear conduit containing branches, for example blood vessels. The flexible member comprises interconnected, and preferably braided, filaments with gaps between the filaments. The member has a first configuration that is axially lengthened and a second configuration that is axially shortened. Means are provided to move the member between its first and second configurations. Biasing means are provided to restrict axial lengthening along one side of the flexible member resulting in bending of the catheter tip.
摘要:
A conveyor system with an automatic operating capability is disclosed. The system is particularly adapted to conveying articles into a steam chamber, vessel, oven or the like and retrieving articles after treatment therein. The system includes a truck driven horizontally, preferably by a chain drive along tracks which extend from a pick-up point, into the chamber, or through the chamber, to a deposit point. The bed of the truck is elevated or depressed, preferably pneumatically, and the system further includes opposed rail members disposed parallel to the tracks, outboard of the tracks, and at an elevation slightly above that of the truck bed in its deflated or depressed condition. Articles to be conveyed are sequentially loaded on the forward end of the truck, the truck bed elevated, and the articles conveyed horizontally to a desired point. The truck bed is then deflated or depressed to deposit the articles on the opposed rails.
摘要:
A pedestal comprising (i) a pedestal base whose upper surface defines at least two pairs of open channels, (ii) horizontal lower support members placed in the channels, and (iii) at least one block component which is fitted slidably over one or more of the lower support members. Two or more block components can be used together, and upper support members can be placed in channels in the upper surfaces of the block components so that they are at right angles to the lower support members. The pedestals are particularly useful in the catering and hospitality industry for supporting food and beverage containers, tableware, flower vases and sculptures.
摘要:
A pedestal comprising a pedestal base whose upper surface defines at least two pairs of open channels. Each pair of open channels is sized and spaced so that a support member of constant cross-section can be slidably fitted into the pair of channels. The pairs of channels are positioned so that, when a straight support member is fitted into each pair of channels, all the support members are parallel to each other and form a platform for supporting objects. The pedestals are particularly useful in the catering and hospitality industry for supporting food and beverage containers, tableware, flower vases and sculptures.