Abstract: A fluid compressor comprises a rotary member, a cylinder, and a closed casing for receiving the rotary member and cylinder. The rotary member and cylinder are relatively turned so that a fluid is drawn into work chambers through a suction port, successively compressed and conveyed toward a discharge port through the work chambers, and discharged outside. The fluid compressor is provided with a control valve means. When pressure in the work chambers exceeds a predetermined value during the compressing process, the control valve releases the pressure through a discharge or suction end of the cylinder, or to the inside of the casing.

Abstract: Fuel contacting elements for gas turbines comprise high temperature alloys having a coke inhibiting layer of titanium carbide, titanium nitride, titanium boride, or mixtures thereof.

Abstract: A multi-purpose retainer is provided for use in association with a drive mechanism for retaining a housing thereof to a support. The mechanism has a nut disposed therein which is accessible through an opening formed in the housing. The retainer has a body portion positionable across the opening for serving as a cover therefor and nut locking device provided on the body portion and extendable into the opening. The retainer is securable in any of a plurality of angular positions relative to the nut to permit the placement of the nut locking device in constraining relation thereabout to lock the nut in substantially any desired rotational position so as to prevent its inadvertent loosening during operation.