Abstract: A force exerted by a load is determined in a force-measuring device (1) operating under electromagnetic force compensation. The device includes a measurement transducer (18, 118) with a coil (20, 120) movably immersed in a magnet system (19, 119) and a force-transmitting mechanical connection between a load-receiving part (12, 112) and the coil or magnet system. A position sensor (21, 28), also part of the device, determines a displacement of the coil from its settling position relative to the magnet system (19, 119) which occurs when the load is placed on the load-receiving part. An electrical current (24) flowing through the coil generates an electromagnetic force between the coil and the magnet system whereby the coil and the load-receiving part are returned to, and/or held at, the settling position. The magnitude of current and the amount of displacement are used to determine the weight force exerted by the load.

Abstract: A substance mass measuring system is applied to a microgravitational rotating apparatus vibration control system to easily measure the mass of an object placed in an experimental box. Recess portions (10a, 10b) are provided in a casing (10). Both ends of a rotary shaft (30) are supported by bearings (11, 12) in the recess portions (10a, 10b). A lower end of the rotary shaft (30) is connected to a motor (13). Four arms (24 to 27) arranged horizontally in the direction of X and Y axes, are at their one ends fixed to the rotary shaft (30) and at the other ends fitted with experimental boxes (20 to 23). Experimental objects are placed in the boxes (20 to 23) and rotated for experiments in space. Vibration of the rotary shaft (30) and the boxes (20 to 23) is absorbed by the bearings (11, 12). Side plates (1a to 1d), acceleration sensors (2a to 2d) and distance sensors (3a to 3d) are arranged in the boxes (20 to 23).

Abstract: A grease slinger, power tool and method of assembling a power tool. The power tool includes a housing, a motor supported in the housing and including a rotatable shaft extending along an axis, a gear case connected to the housing, a flange between the housing and the gear case having a first side and a second side and defining an opening extending between the first side and the second side, a drive mechanism supported by the gear case and drivingly engaging the motor shaft, and a grease slinger. The grease slinger includes a body supportable on the shaft for rotation with the shaft relative to the flange. The body has a first face providing a grease-slinging surface and a second face facing the first side of the flange. The second face includes an annular side wall defining an annular channel. The side wall and the channel cooperate with the flange to provide a labyrinth seal and to prevent grease from flowing from the gear case into the housing.

Abstract: The specification discloses an improved weigh scale of the dual beam type having large and small flow buckets adapted to receive a flow of fluid therein, and an encoder connected to a ball screw having a poise weigh driven by a drive motor for keeping the scale continually balanced while a fluid is being introduced into one of said flow buckets, and having a power supply circuit, a pulse encoder circuit, and a poise control circuit for operation thereof, the improvement including an improved poise control circuit having low gain with high integration for use during the run mode, but being switchable to a circuit having high gain and derivative action during the calibration mode.

Abstract: A coupling device for adjusting the contact pressure between a balance weight and a rotative lead screw in an analytical balance. The weight is threaded upon the lead screw, and is advanced along a balance beam as the lead screw is caused to turn. The balance weight is substantially supported in rolling contact with the frame of the balance beam, and therefore, adds very little contact pressure to the lead screw connection. A leaf spring operatively connected between the balance weight and the lead screw adjusts the force exerted between the lead screw and the balance weight to a predetermined level.

Abstract: An accurate measuring balance for measuring forces or pressures, comprising a travelling mass for bringing a balance arm to equilibrium, which travelling mass is shaped as a body of revolution which can roll on the upper edge of the balance arm, and is mounted in a frame which is movable by an electric motor in the longitudinal direction of the balance arm. The frame comprises rotatable members contacting, in the equilibrium position of the balance, the body at both sides in the horizontal median plane.