Abstract: This invention relates to dynamic devices for insulating wall surfaces and especially surfaces including a window. A self-inflating solar curtain may be automatically raised and lowered in response to the direction of heat flow into or out of a confined space within which the temperature is to be controlled. This confined space could be a solar collector, a room in a house, or another enclosure requiring temperature control. The curtain comprises at least one double-walled, air-entraining envelope with vents at the bottom for enabling an inhaling or exhaling process which takes air into and expels air from the envelope as the curtain is heated or raised, respectively. The curtain may be wound upon and stowed on a roller driven by a motor or other suitable means. A comb-like structure separates the top of the air-entraining envelope to insure an internal spreading of the curtain all of the way up to its top.

Abstract: This invention relates to a self-inflating solar curtain and to the mechanism for automatically raising and lowering same between its operative and inoperative positions in response to the direction of heat flow into and out of a confined space within which the temperature is to be controlled. The curtain comprises at least one double walled air-entraining envelope folded along its lower edge to provide a cradle supporting a rigid combination spreader, weight and guide member effective to maintain a permanent air pocket at the base thereof. Vents are provided in the envelope for taking air into the pocket as well expelling air therefrom as the curtain is raised into its inoperative position through the gap left between a pair of pinch rollers mounted overhead. The sides of the envelope are left open but confined and sealed within the opposed channels of a pair of tracks mounted alongside thereof.

Abstract: This invention relates to dynamic devices for insulating wall surfaces and especially surfaces including a window. A self-inflating solar curtain is automatically raised and lowered in response to the direction of heat flow into or out of a confined space within which the temperature is to be controlled. This confined space could be a solar collector, a room in a house, or other enclosure requiring temperature control. The curtain comprises at least one double-walled air-entraining envelope with vents for enabling an inhaling or exhaling process which takes air into and expells air from the envelope as the curtain is heated or raised, respectively. The curtain can be wound upon and stowed on a roller driven by a motor or other suitable means which may be controlled automatically by sensors which detect and respond to temperature differentials on opposite sides of the curtain.