Abstract: A propelling nozzle for an aircraft engine has an interior shroud of high thermal conductivity which is penetrated by a number of cooling ducts and is surrounded from the outside by a solid support shroud. A cast-in intermediate layer is provided between the interior shroud and the support shroud. This has the advantage that manufacturing tolerances of the interior shroud and of the support shroud may be compensated. Only very minimal demands must be made on the accuracy of shaping the interior shroud and the support shroud.

Abstract: A seal for a gap between two components which are displaceable relative to each other through limited distances in three spatial directions, the seal being formed by at least two partially overlapping corrugated, bellows-like seal elements which are arranged one after the other in the longitudinal direction of the gap. Each seal element is connected to one of the components at a fixed point of attachment and is slidably and guidably connected to both components. Adjacent seal elements can also be slidably and guidably connected to one another. The seal provides sealing action for comparatively large relative movements of the two components and, thus for greatly varying widths and shapes of the gap.

Abstract: A system for recording input electrical signals by positioning galvanometer pen styli relative to a chart paper device in accordance with the input signals. Each pen is mechanically linked to an optical mask. The optical mask in conjunction with an optical system provides a feedback light signal, which is converted to a feedback electrical signal for nulling the input signal. The ink application device includes structure for applying pressure directly to carbon paper, which in turn transfers the carbon or ink to the chart paper, thereby recording clear representations of the electrical signals.