Abstract: An armrest retained a first pin that extends from a back member that is rotatable with respect to a base for a seat. A first lever located within the armrest defines a cantilevered beam with teeth thereon that mesh with teeth on a plate secured to the first pin. A second lever located on a second pin within the armrest positions a ball held in an opening therein in tangential engagement with the armrest and in contact engagement with the first lever. The second lever responds to an input force by pivoting on the second pin and apply a force through the ball to laterally move the teeth out of meshing engagement and permit the armrest to pivot on the first pin into a desired alignment with the base. On termination of the input force, the cantilever beam returns the teeth to meshing engagement to sustain the desired alignment.

Abstract: A tonneau cover for an open bed of a pick-up truck having a front panel, a center panel and a rear panel. Each panel is retained in separate frames defined by first, second, third and fourth reinforcing members which are held in a rectangular shape by corner members. Corner members on a first side of the frame of the center panel retain fixed pins that extend into corresponding openings in a first side wall extending from the open bed and corner members on a second side of the frame retain retractable pins which after being released from retraction extend into corresponding openings in a second side wall extending from the open bed to fix the center panel with respect to the open bed. The front and rear panels are joined to the center panel by rubber hinges.

Abstract: A test stand having a control chamber with a fluid pressure therein for simulating an operational parameter of a device. A doser system with a controller which receives an input representing a desired pressure Px in the control chamber. The controller supplies either a first or second solenoid valve with an actuation signal to allow fluid pressure from a source to enter the control chamber or fluid from the control chamber to flow to the surrounding environment to change the fluid pressure in the control chamber form Pc to Pc'. A pressure transducer supplies the controller with a feedback signal corresponding to the actual fluid pressure Pc' in the control chamber. The controller derives an error signal (Px-Pc') to define an update for the actuation signal. As Pc' approaches Px, the duration of the actuation signal correspondingly changes to assure that the desired fluid pressure for the control chamber is achieved without exceeding the desired fluid pressure in a relatively short time period.

Abstract: In a turbine engine (8) having a shaft (60) with turbine blades (24, 24', . . . 24.sup.N) thereon which rotate in a chamber (12) of the engine housing (10) to produce thrust in response to an operator input. A pneumatic sensor system (30) connected to said housing (10) for maintaining the space relationship between the tip (26, 26', . . . 26.sup.N) of the blades (24, 24', . . . 24.sup.N) and the wall (28) of housing 10 within set limits under varying operational conditions experienced by the turbine engine (8).

Abstract: A control system 54 for a doser type hydraulic actuator 56 is disclosed. The doser actuator includes a pair of unequal area pistons 18, 20 on a common shaft 16 which are moved incrementally by injecting into or removing from a control pressure chamber metered quantities or doses of fluid. The doses are metered by timed openings of solenoid valves 32, 34 connecting the control pressure chambered to a supply 44 or return 48 pressure sources. The control system includes a base pulse width signal generator 106 which pulse modulates the solenoids as a function of the error between a requested position and an actual position. The base pulse width is modified by a correction means 108, 110, 112 when the error is within a predetermined band width. The correcting means compensates for the reaction of the actuator when its response is uncertain with respect to the base pulse width.

Abstract: A system for cooling the bearings supporting the shaft of a rotor in a pneumatic motor powered with hot pressurized fluid. The rotor responds to the flow of hot fluid under pressure by moving to develop output power. The rotors which conduct heat from the hot fluid through the shaft and into the bearings have a series of peripheral axial slots adjacent the ends of the shaft. Fasteners engage the shaft to position the bearings over the series of axial slots. A manifold connects the slots to a discharge conduit. Some of the hot pressurized fluid is diverted through a nozzle in the discharge conduit to create a pressure differential between the manifold and the surrounding environment. This pressure differential draws air from the surrounding environment through the slots and into the manifold. The air on flowing through the slots absorbs heat from the shaft and the inside of the bearings to thereafter maintain the temperature of the bearing below the hot fluid.