초록 ▼

A variable width baffle assembly maintains constant, uniform impedance to the flow of cooling air across a vacant space on a partially populated electronic mounting frame for printed circuit board assemblies. The inexpensive but reliable baffle assembly includes end boards mounted on opposite sides

A variable width baffle assembly maintains constant, uniform impedance to the flow of cooling air across a vacant space on a partially populated electronic mounting frame for printed circuit board assemblies. The inexpensive but reliable baffle assembly includes end boards mounted on opposite sides of the space and a web member extending therebetween. The web member has a plurality of small apertures distributed thereover with a ratio of aperture area to web member surface area selected to approximate the impedance presented by populated portions of the frame. The web member may be mounted in arched, hinged, corrugated or sliding relationship to accommodate changes in the spacing between end boards so that a single model of baffle assembly can accommodate multiple sizes of vacant spaces.

대표청구항 ▼

An assembly comprising: an electronic mounting frame adapted to receive and maintain in parallel spaced relationship a maximum number of electronic elements; at least one and less than the maximum number of electronic elements, each occupying an amount of space; and a baffle assembly that is adaptab

An assembly comprising: an electronic mounting frame adapted to receive and maintain in parallel spaced relationship a maximum number of electronic elements; at least one and less than the maximum number of electronic elements, each occupying an amount of space; and a baffle assembly that is adaptable for insertion into the electronic mounting frame in place of a selectable given number of electronic elements, the baffle assembly being inserted into the electronic mounting frame in place of a selected given number of electronic elements and having a web member including at least one bend having an angle which may be varied to permit the web member to extend or retract as necessary to extend across a space that is occupiable by the selectable given number of electronic elements, the web member extending across a space within the electronic mounting frame that is occupiable by the selected given number of electronic elements, the web member having a plurality of apertures therethrough with a ratio of total aperture area to total web member surface area being approximately equal to a ratio of space occupied by one of the electronic elements to total space available for the one electronic element within the frame, the plurality of apertures presenting an impedance to a flow of cooling air through the electronic mounting frame which approximates an impedance which would be presented by the selected given number of electronic elements if said given number of electronic elements were inserted into the electronic mounting frame in the space occupied by the baffle assembly.