Abstract: The invention relates to the field of ice protectors for inhibiting atmospheric ice accumulation on aircraft structures. More particularly, the invention relates to the bonding of an ice protector to an aircraft structure. According to an aspect of the invention, a device for inhibiting atmospheric ice accumulation on an aircraft structure is provided comprising a flexible ice protector, an intermediate layer bonded to the flexible ice protector, and a pressure sensitive adhesive layer bonded to the intermediate layer. The pressure sensitive adhesive layer defines a bonding surface that bonds the ice protector to the aircraft structure.

Abstract: A thermal zone demand controlled dual cascade arranged heat pump system and system controller for building spaces, having first and second heat pumps and having an air circulation system for circulating air to and from said thermal zones and including a conditioned air chamber having first and second heat exchange refrigerant coils being connected in refrigerant circulating relation respectively with the heat pumps. A plurality of thermal zone blowers conduct conditioned air, heated or cooled, from the conditioned air chamber to respective thermal zones of the building space. Electronic controller circuitry of the system is coupled for thermal demand control of the heat pumps and the thermal zone blowers for operation of the first heat pump to accommodate a predetermined range of thermal load and for operation of the second heat pump along with the first heat pump to accommodate a greater thermal load.

Abstract: A method and apparatus for abrasively machining a workpiece (12) includes the establishment of an eddy-current in the workpiece (12) at an area (33) where an abrasive tool (14) contacts the workpiece (12).Cooling liquid is also directed over the working area.