Abstract: In an elevator system, so as to avoid unwanted safety gear tripping, the kinetic energy, which is caused by inertia of the overspeed governor rope to the lever arm, is dissipated by implementing fluid viscous damping to dampen the rotary movement of the spindle shaft to prevent unwanted safety gear tripping in the event when the upwards movement of the moving mass is decelerated by a machinery brake to perform a quick stop of the moving mass. The fluid viscous damping is effected by a viscous fluid damper which is arranged in the synchronization linkage mounted to the moving mass.

Abstract: A multi-throw reciprocating pump is provided. The pump provides active stroke control. Fluid flow is controlled by canceling out at least a portion of a discharge stroke of one plunger with a suction stroke of another plunger. Controlling the degree to which the discharge stroke is cancelled out is used to control the actual volume of fluid being pumped.

Abstract: An assembly (20) for controlling movement of an elevator car (12), which includes a sheave (18), a first mass (32a, 48a), a second mass (32b, 48b), and a coupler (54) that provides a releasable non-elastic connection between the masses. The sheave (18) is configured to rotate about an axis of rotation (30) at a velocity related to a velocity of the elevator car (12). The first (32a, 48a) and second (32b, 48b) masses are attached to the sheave (18) at first and second pivot points (42a, 42b) radially spaced from the sheave axis of rotation (30). The coupler (54) that provides the releasable non-elastic connection between the first (32a, 48a) and second (32b, 48b) masses is configured to prevent pivotal movement of the masses at sheave angular velocities less than a first velocity and to permit pivotal movement of the masses at velocities greater than the first velocity.

Abstract: Disclosed is a brake timing control method and apparatus for use with a press machine including a press slide driven through a crank shaft by a variable speed motor to stop the moving press slide at its top dead center regardless of the speed of rotation of the crank shaft. The motor speed is detected and converted into a voltage proportional to the motor speed which is then integrated as a first voltage. A second voltage is provided in accordance with a line or curve representing as a function of motor speed the approximation of the slip angle through which the crank shaft will continue to rotate after braking is initiated. The first and second voltages are additively combined and compared with a reference voltage to provide a stop signal for initiating braking on the press machine when the sum of the first and second voltages reaches the reference voltage.

Abstract: A shut-off unit is disclosed. The shut-off unit is to be used to shut off a drive unit which drives a tubular shaft, the latter shaft being employed, in turn, to wind an awning or a roller blind up and down. More particularly, the drive unit includes an electric motor and a step down gear drive axially aligned therewith and the shut-off unit is adapted to be arrangeable in the drive unit so that the step down gear lies between it and the motor. Additionally, the shut-off unit includes switches for stopping the drive and members for operating such switches which have presettable positions dependent upon presettable positions of a driven part of the electric motor. In accordance with the invention, the aforesaid members are in the form of cams which have lobes and which are adapted to rotate as a function of the movement of the element to be wound and to be drivingly connectable to the central output shaft of the step down gear.