Abstract: A force transducer angularly adjustable about an axis for producing an output signal proportional to the magnitude of an input force. A signal output member, cantilevered from a base through a spring flexure, is provided with a spindle, the center of which lies in the axis, receives the input force. The moment impressed on the flexure by the input force and the resulting displacement of the output signal member from a null or no-load position is a function of the magnitude of the input force and the angular adjustment of the transducer about the axis. Such angular adjustments can be made in-situ without disturbing the spatial position of the spindle.

Abstract: A force transducer producing two output signals having different proportionalities to the magnitude of a force applied to a force receiving platform cantilevered from a base through a C-shaped flexure producing a displacement of the platform proportional to the magnitude of the applied force, a first LVDT (Linear Voltage Differential Transformer) having a movable armature directly connected to the force receiving platform generating a first output signal proportional to the displacement of the force receiving platform and a second LVDT having a movable armature connected to the force receiving platform through a motion multiplying linkage generating a second output signal having a different proportionality to the displacement of the force receiving platform.

Abstract: A load control for a system comprised of a plurality of energy converters wherein increases in total energy demand from the system is compensated by increasing only the rate of energy conversion of that converter producing energy conversion at least cost and decreases in total energy demand from the system is compensated by decreasing only the rate of energy conversion of that converter producing energy conversion at highest cost.

Abstract: A force transducer for producing an output signal in proportion to the magnitude of an input force wherein an equal and opposite force is produced by a flexure assembly comprised of a compound leaf-spring flexure having opposed outer sections, anchored in and cantilevered from a fixed and a movable base respectively, which gradually decrease in cross-sectional area to a thin middle section wherein the movable base is constrained to linear displacement from a null or neutral position by having the force applied along a line normal to and passing through the center of the thin middle section and transmitted to the movable base through a rigid connection. A modified form of flexure assembly is disclosed comprised of parallel compound flexures each having a thin middle section and opposed outer sections which are anchored in and cantilevered from a fixed common base and a movable common base.

Abstract: A mechanism for the insertion into and withdrawal from a support structure of a circuit board having an array of male contacts mounted along a lateral edge for engagement with a mating array of female contacts in a zero insertion force connector mounted in the support structure. Means are provided whereby the female contacts must be locked in an expanded position before a circuit board can be inserted into or removed from the support structure.

Abstract: A load control for a system comprised of a plurality of energy converters wherein the energy output of all converters is adjusted in parallel to maintain the total rate of energy output from the system equal to demand and wherein during steady-state conditions the rate of energy conversion for that converter having the lowest incremental cost is increased and simultaneously the rate of energy conversion for that converter having the highest incremental cost is decreased a like amount.

Abstract: A system for inspecting the relatively long, thin-walled, small-bore tubes of a heat exchanger provided with support plates for holding the tubes in predetermined positions, comprising a composite scanner having a plurality of flexure springs contacting the interior surface of a tube for detecting and profiling tube abnormalities as the scanner traverses the tube and an eddy current sensor incorporated in the scanner for generating a unique signal as the scanner passes a contiguous support plate to assist in the accurate location of tube abnormalities.

Abstract: A system for the measurement and control of the rate of BTU input to a gas burner wherein a signal is generated corresponding to the square root of the product of the burner inlet pressure multiplied by the in-situ density olf the gas, which, multiplied by a signal of constant value, corresponds to the mass flow of gas to the burner. This signal is then multiplied by a second signal of constant value to generate a signal corresponding to the rate of BTU input to the burner and which is compared with a set point signal to regulate the mass flow of gas to the burner as required to maintain the rate of BTU input to the burner at set point.

Abstract: In a force transducer for producing an output signal proportional to the magnitude of a force applied to a force receiving platform cantilevered from a base through a compound flexure unit, comprising: (a) a C-shaped flexure having a thin, flexible middle section and opposed rigid outer sections engaging, respectively, the opposed surfaces of the platform and base and, (b) an auxiliary flexure spring system comprising parallel spaced apart leaf springs cantilevered, respectively, from the opposed rigid sections joined together at their free ends by a clamp adjustable to vary the effective length of the springs as required to calibrate the transducer to a predetermined force range.

Abstract: A compound shuttle for a broaching machine having a pair of spaced parallel broach trains carried on a common slide reciprocable in forward and reverse passes past a work-piece mounted on a compound shuttle for positioning the work-piece into the path of a broach train during a forward pass, away from the broach train during reverse passes and moving the work-piece from axial alignment with one broach train into axial alignment with the other broach train upon completion of a forward pass.

Abstract: A hybrid analog function generator producing an adjustable time delayed analog output signal varying in predetermined non-linear relationship with an analog input signal wherein the analog input signal is converted to a first digital signal addressing a programmable read only memory which is programmed to produce a second digital signal, corresponding to the predetermined function of the analog input signal, which is converted to a proportional analog output signal and wherein a selected digital number can be added to the first digital signal and wherein the quotient of a first analog input signal divided by a second analog input signal can be converted to the first digital signal and wherein an analog output signal can be generated which is proportional to the second digital signal multiplied by a third analog input signal.

Abstract: A delta-P transmitter generating a signal corresponding to the differential pressure produced by a primary element installed in a conduit through which a fluid flows, comprising the primary element and a transducer implanted in the primary element to generate a signal corresponding to the differential pressure with which may be combined the signals generated by a temperature transducer and/or an absolute pressure transducer to generate an output signal corresponding to the weight or mass rate of fluid flow.

Abstract: A meter of the heat transported by a heat carrier comprising a meter of the rate of flow of the carrier at specified design conditions of pressure, temperature or quality, and enthalpy compensated by a compound correction factor consisting of the product of a composite pressure correction factor and a composite temperature or quality correction factor for deviations of the carrier from design conditions.

Abstract: A system for inspecting the relatively long, thin-walled, small-bore tubes of a heat exchanger provided with support plates for holding the tubes in predetermined positions, comprising a composite scanner having a plurality of flexure springs contacting the interior surface of a tube for detecting and profiling tube abnormalities as the scanner traverses the tube and an eddy current sensor for generating a unique signal as the scanner passes a contiguous support plate to assist in the accurate location of tube abnormalities.

Abstract: A self-actuated flow control valve having a remote adjustable set-point established by varying the energization of a solonoid having an armature articulated to a piston provided with a fluid inlet orifice and reciprocable in a cylinder having an outlet port throttled by the piston upon an increase in flow above set-point and vice versa to restore the rate of flow to set-point.

Abstract: A method for deriving the eddy current signature of a flaw in a tube proximate a contiguous member which is obscured in the composite signature of the flaw and contiguous member by subtracting from the composite signature a reference eddy current signature generated by a facsimile of the tube and contiguous member.

Abstract: Apparatus including a portable manipulator for the axial alignment of an inspection or repair device with a selected tube in a heat exchanger. The manipulator is angularly positionable about a center toward and away from an arbitrarily chosen axis and radially toward and away from the center by remotely controlled servomotors. Incorporated in the manipulator are position feedback devices whereby the manipulator is positioned to the predetermined polar coordinates of the selected tube.

Abstract: A thrust-torque transducer for measuring the end thrust or torque of a rotating shaft comprising a thrust bearing producing an axial displacement of the shaft from a no load or null position and an LVDT (Linear Voltage Differential Transformer) having a movable core axially aligned with, secured to and rotatable with the shaft producing an output signal corresponding to thrust or torque. A feedback loop may be incorporated in the transducer to maintain the shaft in the no load or null position from which a signal may be obtained corresponding to thrust or torque.

Abstract: Apparatus for the in situ inspection of tubes which are submerged in a liquid such as the primary coolant of a nuclear reactor, wherein a sensor is withdrawn from a tube by a cable, including means for removing the liquid from and drying the cable and returning the liquid to the tubes thus preventing the spread of deleterious liquids to otherwise benign environments and the fouling of the drive mechanism used to control cable movements.