There is disclosed an aircraft engine assembly including an engine having an engine shaft; an output shaft; a clutch in driving engagement between the engine shaft and the output shaft. The clutch has a first component in driving engagement with the engine shaft and a second component. The clutch is operable between first and second configurations. In the first configuration, the first component is rotatable relative to the second component and the engine shaft is rotatable relative to the output shaft. In the second configuration, the first and second components are engaged with one another and the engine shaft rotates with the output shaft. A mechanical lock is operable between first and second positions. In the first position, the mechanical lock is disengaged from the first component. In the second position, the first and second components are secured for joint rotation one relative to the other.

There is disclosed an aircraft engine assembly including an engine having an engine shaft; an output shaft; a clutch in driving engagement between the engine shaft and the output shaft. The clutch has a first component in driving engagement with the engine shaft and a second component. The clutch is operable between first and second configurations. In the first configuration, the first component is rotatable relative to the second component and the engine shaft is rotatable relative to the output shaft. In the second configuration, the first and second components are engaged with one another and the engine shaft rotates with the output shaft. A mechanical lock is operable between first and second positions. In the first position, the mechanical lock is disengaged from the first component. In the second position, the first and second components are secured for joint rotation one relative to the other.

A brake apparatus, a motor, and a robot. The brake apparatus includes a first ring connected to a shaft and being rotatable together with the shaft. Wherein the first ring includes a first set of magnets. The brake apparatus also includes a second ring, which is spaced apart from the first ring by a gap, and includes a second set of magnets, the second set of magnets being magnetically coupled to the first set of magnets such that the second ring tends to rotate along with the first ring. The brake apparatus includes a first member connected to the second ring and being rotatable together with the second ring; and a second member being switchable between a first state and a second state. An impact force will not be transmitted to the shaft when the shaft is rotating, and thus a damping effect can be achieved during braking.

A brake apparatus, a motor, and a robot. The brake apparatus includes a first ring connected to a shaft and being rotatable together with the shaft. Wherein the first ring includes a first set of magnets. The brake apparatus also includes a second ring, which is spaced apart from the first ring by a gap, and includes a second set of magnets, the second set of magnets being magnetically coupled to the first set of magnets such that the second ring tends to rotate along with the first ring. The brake apparatus includes a first member connected to the second ring and being rotatable together with the second ring; and a second member being switchable between a first state and a second state. An impact force will not be transmitted to the shaft when the shaft is rotating, and thus a damping effect can be achieved during braking.

A mobile radiography system includes a wheeled transport frame and a vertical column mounted on the transport frame. A telescoping arm is attached to the vertical column and to an x-ray tube head. The telescoping arm allows an operator to rotate the tube head to a desired orientation and then to fix the tube head in the desired orientation without mechanical impact noise. A permanent magnet and an electromagnetic coil assembly allows an operator to easily and quietly control rotation of the tube head.

A mobile radiography system includes a wheeled transport frame and a vertical column mounted on the transport frame. A telescoping arm is attached to the vertical column and to an x-ray tube head. The telescoping arm allows an operator to rotate the tube head to a desired orientation and then to fix the tube head in the desired orientation without mechanical impact noise. A permanent magnet and an electromagnetic coil assembly allows an operator to easily and quietly control rotation of the tube head.

The present disclosure relates to a brake disc for a vehicle disc brake. The brake disc has a brake disc body, with a friction ring on which friction surfaces are formed, and a brake disc pot that is designed for fastening the brake disc to a vehicle axle. The brake disc pot is connected to the brake disc body in a connecting area via at least one connecting element, and at least one reinforcing ring in the connecting area is mounted on the brake disc in a force-fit manner.

The present disclosure relates to a brake disc for a vehicle disc brake. The brake disc has a brake disc body, with a friction ring on which friction surfaces are formed, and a brake disc pot that is designed for fastening the brake disc to a vehicle axle. The brake disc pot is connected to the brake disc body in a connecting area via at least one connecting element, and at least one reinforcing ring in the connecting area is mounted on the brake disc in a force-fit manner.

A cordless roller blind includes a roller tube, a blind fabric wound around the roller tube, and at least one brake device. A coil spring is arranged in the roller tube, and the torsion of the coil spring changes as the roller tube rotates. The torsion force of the coil spring, the friction force provided by the brake device and the weight of a hanging portion of the blind fabric are mutually balanced, so that the blind fabric remains stationary at any position without an external force. When the external force pushes the blind fabric to move upward, pressure acting on the brake device decreases as the external force offsets the weight of the blind fabric, and the friction decreases accordingly, and the torsion force of the coil spring drives the blind fabric to wind up.

A cordless roller blind includes a roller tube, a blind fabric wound around the roller tube, and at least one brake device. A coil spring is arranged in the roller tube, and the torsion of the coil spring changes as the roller tube rotates. The torsion force of the coil spring, the friction force provided by the brake device and the weight of a hanging portion of the blind fabric are mutually balanced, so that the blind fabric remains stationary at any position without an external force. When the external force pushes the blind fabric to move upward, pressure acting on the brake device decreases as the external force offsets the weight of the blind fabric, and the friction decreases accordingly, and the torsion force of the coil spring drives the blind fabric to wind up.