Abstract: The present invention relates generally to laboratory apparatus and more particularly to disposable suspended magnetic stirrers. An apparatus having a stirring vessel closure and a stirring vessel is disclosed. The stirring vessel closure includes a suspended magnetic impeller, the elevation of which is adjustable by a moveable bearing. The invention is particularly suitable for applications in which solids must be suspended in a liquid medium with a minimum of shear forces, such as in the suspension of tissue cell cultures in a growing medium. The disclosed stirring vessel closure has inclined access ports to allow improved pipette accessibility to the interior of the stirring vessel while also providing improved close packing of stirring vessels during usage or storage.

Abstract: A "hi/lo" headlight beam selector switch system having a "flash-to-pass" mode, including a terminal block having a back panel with a set of profiled terminal pads mounted thereon, at least one, linearly movable carrier having on its side facing the pads at least one contactor having multiple contact dimples thereon, the dimples being drawn linearly across the back panel interconnecting two or more pads as the carrier(s) move(s) along side them. In a first embodiment (FIGS. 1-3B) two separable carriers, the lower, "hi beam" one of which can be latched down in place, have two return springs, a weaker one positioned between them and a stronger one under the bottom of the "hi beam" carrier; while in a second embodiment (FIGS. 4 & 5) a single carrier working with only three terminal pads compared with four pads is used.