Abstract: A ground from a printed circuit board to the frame of an electronic system is formed by a biaxially-compressible conductive spring that is captivated between the printed circuit board and a plastic stiffener to which the board is fastened. The spring makes contact with a ground pad on the underside of the printed circuit board. As the board is fully installed in the electronic system, standoffs attached to the system frame make contact with the conductive spring, completing the ground path. Keyhole-shaped cutouts in the printed circuit board secure the board without the use of tools. When the board assembly is lowered onto the standoffs, the head of the standoff passes through the circular opening of the keyhole. The board assembly is secured in place by sliding it on the standoffs to a position in which the head of the standoff is over the narrower slot portion of the keyhole.

Abstract: A ground from a printed circuit board to the frame of an electronic system is formed by a biaxially-compressible conductive spring that is captivated between the printed circuit board and a plastic stiffener to which the board is fastened. The spring makes contact with a ground pad on the underside of the printed circuit board. As the board is fully installed in the electronic system, standoffs attached to the system frame make contact with the conductive spring, completing the ground path. Keyhole-shaped cutouts in the printed circuit board secure the board without the use of tools. When the board assembly is lowered onto the standoffs, the head of the standoff passes through the circular opening of the keyhole. The board assembly is secured in place by sliding it on the standoffs to a position in which the head of the standoff is over the narrower slot portion of the keyhole.

Abstract: Lean flameout upon ignition in a turbine system including a turbine wheel (10) driven by motive gases including gases of combustion from a combustor (20) may be avoided by locating an orifice (130) downstream of the servo/.DELTA.P valve (52) that controls fuel flow to the fuel inlet (22) of the combustor (20).

Abstract: Improved control over the production of motive gas applied by a nozzle (16) to a turbine wheel (10) may be achieved by a method of (a) supplying fuel to a combustor (20), (b) simultaneously with the performance of step (a), supply insufficient oxidant for the fuel through a path (90) to the combustor (20), and (c) simultaneously with steps (a) and (b), supplying additional oxidant sufficient to effect desired combusiton of the fuel to the combustor (20) via a path (92) and at a variable rate.

Abstract: Improved control over the production of motive gas applied by a nozzle (16) to a turbine wheel (10) may be achieved by a method of (a) supplying fuel to a combustor (20), (b) simultaneously with the performance of step (a), supply insufficient oxidant for the fuel through a path (90) to the combustor (20), and (c) simultaneously with steps (a) and (b), supplying additional oxidant sufficient to effect desired combustion of the fuel to the combustor (20) via a path (92) and at a variable rate.