Abstract: An assembly including a host device and an add-on module, in which the host device and the add-on module include features to provide a rugged electro-mechanical interface or connection between the host device and the add-on module. The host device includes a body that has an open or non-enclosed docking bay on a side, and the module is placed into the docking bay such that a top side of its body mates with the inner surfaces and features of the docking bay. The interface is rugged so that the assembly is useful in the field, and the interface provides a secure attachment that can withstand dropping. A hook is provided on the top side of the body of the module, and the hook feature's shape, when combined with the location of fasteners on the module body that mate with threaded holes in the docking bay, is designed to withstand dropping.

Abstract: A method of generating steam by heating water in a steam generator comprising a plurality of steam generating channels, wherein water is supplied at a constant rate to each steam generating channel through respective water supply lines, and wherein a sufficient pressure drop is provided across each water supply line in order to prevent flow reversal in the plurality of steam generating channels.

Abstract: A method of generating steam by heating water in a steam generator comprising a plurality of steam generating channels, wherein water is supplied at a constant rate to each steam generating channel through respective water supply lines, and wherein a sufficient pressure drop is provided across each water supply line in order to prevent flow reversal in the plurality of steam generating channels.

Abstract: A burner for an external combustion engine using liquid or gaseous fuel, the burner being arranged for heat exchange between the inlet air to the burner and the exhaust air from the burner. The burner includes an external housing, a shroud within this housing, which shroud forms part of the centrally positioned combustion chamber. The burner includes air inlet apparatus and guide apparatus for guiding the inlet air to the combustion chamber, an igniter and fuel inlet apparatus and gas exhaust apparatus. The external housing, an element of the inlet apparatus, the guide apparatus, and heat exchange elements are formed as inverted shaped dishes or shells about the combustion chamber.