A uterine controlling forceps particularly useful for manipulation of the soft post-abortal or post-partum uterus during laparoscopic sterilization consists of a pair of tips gently curved to rise about 90.degree. to parallel side-by-side shank portions, a pair of generally rectilinear handle members extending from the shank portions at an angle of about 20.degree. and diverging when the tips are closed an amount at least as great as the maximum divergence desired at the tips, a hinge connecting...

A fluid system for controlling the position of an output according to the position of an input and comprising a first variable flow control valve including a sensor arranged for sensing the position of the input and operative for generating a first fluid pressure signal dependent on the input position, a second variable flow control valve connected to the first valve and including a sensor arranged for sensing the position of the output and operative to produce a second fluid pressure signal dep...

Controllers (PID1 to PIDn) perform control so that the controlled variables of first to n-th control loops may agree with their preset values. A step response progress calculating section (C_R1) calculates the progress .alpha.1 of the step response of the first control loop where the variation of the controlled variable is the slowest. Control loop internal preset value calculating sections (C_S2 to C_Sn) correct the preset values of the second to n-th control loops according to the progress .al...

A fluid control circuit comprising a controller including a control element movable between first and second positions and operative for generating an output fluid signal dependent on the position of the control element, and first and second sensors arranged for sensing a pilot pressure, one of the sensors being operable for causing the control element to assume its second position when the sensed pilot pressure exceeds a predetermined upper level, and the other of the sensors being operable for...

Shunt motor field control for setting motor torque (and thereby controlling tension on a reeler or the like driven by the motor) comprising thyristor control gated by a comparator with a ramp-form voltage input compared to a reference level established by an operator setting of a potentiometer. The ramp-form voltage is generated by charging and discharging a capacitor and provides a spike voltage through the comparator when the reference level is exceeded. Means are provided to compensate potent...

A completely mechanically operated microscope bridge includes rapid rough positioning, fine positioning, coarse focusing and fine focusing with an automatic locking system locking the microscope at the position set by the operator whether power is on or off. In the focusing mechanism the drive slips when the microscope hits the viewing platen or if the microscope rhomboid is caught under the cross beam or overhanging arm on the light table while being raised. A brake prevents the microscope from...

A controlling transmission comprising a planetary gear mechanism in which at least one pair of intermediate gears are interposed to mesh with a sun gear and an internal gear and in which intermediate shafts respectively supporting the intermediate gears are fixed on a carrier. The indexing positions for fixing the intermediate shafts on the carrier are set such that a tooth surface contacting state, in which one of the intermediate gears meshes with the sun gear and the internal gear, and anothe...

D.C. motor control utilizing an input transformer with magnetic leakage and current control to allow power, whether generated occasionally or continuously from the motor (induced by load inertia and the like) to be smoothly returned back into the main A.C. power line, consistent with continuous smooth speed control (low form factor), low heating and low cost.

A generally figure-of-eight transformer core carries first, second and third toroidal windings spaced along its central leg and is formed with magnetic shunts across the gaps between central and outside legs in the planes between windings. A capacitor is connected across the second winding of value so that it coacts with the effective leakage reactances provided by the magnetic shunts so that the output load current provided by the third winding is directly proportional to the input voltage appl...

A temperature controlling system (10) is normally controlled by a thermostat that is superseded by a remotely controlled thermostat (21) in response to a remote control signal transmitted over telephone lines that retains control for eight hours established by an eight-hour clock (14). A response oscillator with warning thermostat (13) provides an answering signal indicating that the superseding thermostat is exercising control over the temperature controlling system of pitch which is varied to ...