Thaddeus D. Misiura - Princeton Junction NJ Gordon K. Lambert - Starkville MS
Assignee:
Parker-Hannifin Corporation - Cleveland OH
International Classification:
F16L 1112
US Classification:
138149
Abstract:
A core element, as for example a pipe, tube, hose or the like, has thermal insulation applied thereto in the form of a plurality of layers of tape applied in a continuous process in which conditions are selected to deliberately create wrinkles thereby defining air spaces serving to further reduce the transmission of heat through the composite thermal insulation. The wrinkles may be introduced by wrapping the tape about the pipe at an applied angle greater or smaller than the angle required for a given effective diameter, overlap factor, and width of tape, At the outer surface of the wrap the tape is substantially wrinkle-free and a jacket of polyvinyl chloride or the like is applied thereto. The difference between a theoretical angle of application calculated to produce a wrinkle-free wrap, and an actual angle of application, is progressively lowered in a direction radially outwardly from the tube or other core element, thus causing the wrinkles to become, correspondingly, more and more pronounced in a direction radially inwardly from the jacket. In turn, the air spaces or voids are thereby caused to become progressively enlarged in the radial inward direction, becoming maximized at the surface of the core, that is, at the precise location which has the highest thermal gradient.
An improved electrical system for a recreational vehicle or the like including a first battery for starting the engine and the like, having a second or auxiliary battery for providing electric current to interior lights and the like. The improvement includes a link circuit for electrically linking the first and second batteries and a supplemental electric current source such as an independently powered generator or an electric utility current source, and control structure for allowing electric current to flow through the link circuit from the second battery and/or the supplemental electric current source to the first battery and the first battery load without allowing the flow of significant electric current from the first battery to the second battery or the second battery load.
C. Gordon Lambert (9 April 1919 27 January 2005) was an Irish art collector who, in 1992, donated over 300 paintings to the Irish Museum of Modern Art. He ...