Abstract: A rotary geared actuator for pivotally connecting a flap to a wing of an aircraft, includes at least two adjacent actuator slices rotatably coupled together, each actuator slice including a sun gear rotatably coupled to a drive shaft and having gear teeth with a curved profile to enable movement of the actuator slices with respect to each other in conformance with bending of the wing, planetary gears in surrounding and meshing engagement with the gear teeth of the sun gear, a movable ring gear in surrounding and meshing engagement with the planetary gears, and a fixed ring gear in surrounding and meshing engagement with the planetary gears on opposite sides of the movable ring gear, each fixed ring gear being in meshing engagement only with planetary gears of one actuator slice; at least one fixed side tie bar connecting each fixed ring gear with the wing; at least one movable flap side tie bar connecting each movable ring gear with the flap; securing pins for securing each fixed side tie bar to one fixed rin

Abstract: A rotary hinge actuator, for instance for rotating a wing flap relative to a wing in an aircraft, has a sun gear, several spindle gears around the sun gear and several annular gear sleeves around the sun gear and spindle gears. Each spindle gear has sections with external helical gear teeth which are slanted in the same direction and which respectively mesh with internal helical gear teeth on the annular gear sleeves. At least one of the sleeves is connected to the wing and at least another to the wing flap. Upon rotating the spindle gears the wing flap is rotated relative to the wing.

Abstract: Aircraft attitude along the pitch axis is controlled by inputting a velocity command to a pitch control subsystem that includes a velocity side channel and a gain side channel of a pitch servo amplifier. An output from each channel of the pitch servo amplifier is applied to a pitch servo motor for positioning a primary control surface. The velocity of the pitch servo motor is detected by a velocity detector that generates a velocity feedback signal and control signals for each channel of the pitch servo amplifier. Also responsive to the velocity signal of the detector is a pre-flight test circuit for pre-flight checkout of the pitch control subsystem. In each line from the output of the channels of the pitch servo amplifier is a current detector that is part of a pitch trim control subsystem that responds to the current through the pitch servo motor to generate a trim velocity command signal. This velocity command signal is input to a velocity side channel and a gain side channel of a trim servo amplifier.

Abstract: The bidirectional, torque-limiting, drive and brake mechanism has an input and output drive shafts and a helical spring which is normally in interference fit with the mechanism housing and, in the torque transmitting mode of operation, is disengaged to permit torque transmission by a direct mechanical coupling between the input and output drive shafts. The torque-limiting component, which functions to interrupt transmission of rotation from the input drive shaft to the output drive shaft upon a predetermined torque load, is adjustable to a selected predetermined torque load in the field.

Abstract: A dual function torque limiter/no-back device for limiting torque to an output member and for preventing transmission of torque from such output member comprising a casing, an input member supported for rotation in the casing and connected to a source of rotary power to be driven by the latter. Also an output member is supported for rotation in the casing and connected to a load to be rotated. A drive coupling assembly is connected to the input and output members for transmitting torque from the input member to the output member and having torque response means operative at a predetermined torque value. A brake assembly is disposed in the housing and is operative to positions of engagement and disengagement.

Abstract: A self-venting waterproof container includes upper and lower waterproof body portions along with a sealing mechanism to effect a seal therebetween. A pressure relief valve provides venting communication between the interior of the container and the environment in which the container is used when there is a differential in environmental pressure and the pressure in the interior of the container. A vacuum relief valve eliminates, when opened, any vacuum existing in the interior of the container. Deformable material used for the body portions allows the container to collapse around the equipment therein under environmental pressure.

Abstract: An apparatus is provided for testing semiconductor devices. The apparatus tests the impedance of the semiconductor devices in both conducting and non-conducting states to detect semiconductors whose impedance in the conducting state is too high or whose impedance in the non-conducting state is too low. The apparatus uses a battery source for low voltage d.c. The circuitry for detecting when the impedance is too high in the conducting state includes a lamp in series with the battery source and the semiconductor device, whereby the impedance of the semiconductor device determines whether sufficient current will flow through the lamp to cause the lamp to illuminate. A d.c. to d.c. converter is provided to boost the voltage from the battery source to a relatively high voltage d.c. The relatively high voltage d.c. can be connected by a switch to circuitry for detecting when the impedance of the semiconductor device in the non-conducting state is too low.

Abstract: A field replaceable silicon controlled rectifier (SCR) heat sink with reliable thermal and electrical connection to the SCR or other electronic device for an electronic circuit forming part of a vehicle control. The SCR heat sink includes two discrete heat sink blocks having opposed parallel faces between which an SCR or other electronic device may be properly clamped. At least one insulator hold down bar and an associated spring overlie a flange on the lowr end of each block and facilitate clamping the blocks to a base plate. The blocks are clamped to the SCR by a force distributing spring and bolts for properly applying a clamping force to the SCR or other electronic device.

Abstract: An oxygen supply system for human inhalation of oxygen at a constant oxygen flow rate is provided including an oxygen cylinder having a pressure regulator to provide a source of pressure regulated oxygen which is passed through a fluid restrictor nozzle having a metering orifice to provide a constant volume oxygen flow to an oxygen inhalation mask through a first oxygen hose connected to the cylinder and a second mask hose connected to the inhalation mask. An oxygen flow shut-off valve is provided in a normally open position to allow oxygen flow normally from the cylinder through the hoses and through an inhalation valve in the mask to the user. A fluid pressure responsive diaphragm is provided in association with the oxygen flow shut-off valve to shut-off oxygen flow to the mask when oxygen pressure buildup in the mask hose exceeds a predetermined amount, such buildup occurring when user exhalation closes the mask inhalation valve.

Abstract: Apparatus is disclosed for controlling the speed of an electric motor by selectively connecting a field weakening resistor across the field winding of an electric motor. A first means is provided for comparing the field voltage to a fixed reference voltage and for generating a first signal in response to the field voltage falling below a first predetermined value and a second signal in response to the field voltage rising above a second predetermined value. A second means responsive to the first and second signals is provided for selectively connecting a field weakening resistor across the field winding of the motor in response to the field voltage falling below the first predetermined value. The second means responsive also disconnects the field weakening resistor in response to the field voltage rising above the second predetermined value.

Abstract: The voltage of a battery connected to a load is monitored to provide a continuous instantaneous indication of the voltage level of the battery and to provide an indication that the battery voltage has fallen to some critical level. Means are provided for generating a control signal which is representative of the battery voltage when the apparatus is operated in the battery testing mode and an independent voltage when the apparatus is operated in the self-testing mode. A first indicator means responsive to the control signal is provided for continually indicating the instantaneous level of the battery voltage when the apparatus is operating in the battery testing mode and the instantaneous level of the independent voltage when the apparatus is operating in the self-testing mode.

Abstract: The voltage of a battery connected to a load is automatically indicated with respect to two voltage levels. A first indicating means indicates that the battery voltage is greater than a first voltage level, and a second indicating means indicates that the battery voltage is less than the first voltage level but greater than a second voltage level. A third indicating means indicates that the battery voltage is less than both the first and second voltage levels and disables the load connected to the battery.Means are provided for selectively generating a control signal either in response to the battery voltage or at a decay rate independent of the battery voltage. In a normal operating mode, the control signal is determined by the actual decay rate of the battery voltage whereas, in a self-test mode, the control signal decays at a fixed decay rate independent of the actual battery voltage. The first, second and third indicating means operate in response to the control signal.