Abstract: A main shaft fixture for fixing a main shaft on a wind turbine during installation and repair work on heavy parts of the wind turbine nacelle, in the case where the fixture is formed of several sections for mounting on stable structural parts in the nacelle, including the nacelle's bottom frame. The main shaft fixture has adjustable pressure mandrels with tap shoes, which cause the fixture to be usable regardless of the turbine main shaft geometry, such that it can be mounted without fixing the rotor. The main shaft fixture also has facilities for mounting of a lightweight crane and a self-hoisting crane with a ground-based winch, respectively, as well as a rotor lock which, in combination with actuators of the main shaft fixture, enables the main shaft and the main shaft bearing to be sufficiently displaced vertically from its bearing in the nacelle to service or replace the bearing.

Abstract: A switching mechanism includes a main body, a rotational body, a swinging member, and a biasing member. The swinging member detaches from the shaft portion against a biasing force of the biasing member by a centrifugal force generated at the swinging member in response to rotation of the rotational body rotating in conjunction with movement of the rotational member, for example, a vehicle door, to switch the state of the switching mechanism to an operation allowed state in a state where the rotational member is operated to rotationally move. The biasing force of the biasing member pushes the swinging member to make contact with the shaft portion and engages with the shaft portion by friction to retain the rotational body in a stopped state to switch the state of the switching mechanism to a movement restrained state in a state where the rotational member is stopped from making rotational movement.

Abstract: A system for absorbing vibration in a rotary member having a predetermined rotary speed of the present invention has a selectively moveable mass and a positioning mechanism. The mass is in communication with the rotary member having a predetermined position. The positioning mechanism exerts a force on the mass at least when the rotary member operates below the predetermined rotary speed. The force exerted by the positioning mechanism orients the mass at the predetermined position when the rotary member operates below the predetermined rotary speed.

Abstract: A motor brake can be coupled to the rotatable motor drive shaft. The brake includes a shaft-mountable support that rotates uniformly with the drive shaft. One or more brake shoes, which can include flyweights or the like, are hingedly mounted to the support and include brake pads. A centripetal force is applied to the brake shoes using one or more springs or other biasing means that bias the brake pads against a braking surface when rotation of the shaft is below a minimum rotational velocity. The brake pads disengage from the braking surface when shaft rotation exceeds the minimum rotational velocity. The centrifugal force induced and applied to the brake shoes and brake pads by rotation of the motor drive shaft overcomes the biasing force to disengage the brake pads from the braking surface, which may be the housing of a motor to which the brake is affixed.

Abstract: A spring loaded snubber brake is provided for a Power Take Off (PTO) shaft of a tractor. The brake is carried by the PTO shaft and utilizes the centrifugal force created by the spinning shaft to become disengaged as the shaft rotates and become engaged as the shaft is declutched. Since the brake does not apply any frictional force on the shaft as it rotates, there is no parasitic loss of PTO output horsepower. As the shaft is declutched and comes to rest, the brake springs urge it into engagement with the shaft to prevent inadvertent rotation of the shaft due to residual forces produced by hydraulic fluid forces operating on the PTO drive components.

Abstract: A braking device including a chamber rotatably mounted on an axle, the chamber defining an inner cavity, a disc mounted on the axle in the inner cavity, the disc having opposing surfaces extending away from the axle, and a pourable material disposed in the inner cavity such that rotation of the chamber imparts a centrifugal force to the material, causing the material to be wedged between an inner surface of the inner cavity and the opposing faces so as to apply a braking force to the disc.

Abstract: Holding brake for a traction sheave elevator, comprising a brake body (1), a movable frame (2) movably mounted in the brake body, a brake pad (3) attached to the movable frame, a pulling element (4) mounted on the brake body for pulling the movable frame toward the brake body and a compressing element (5) mounted between the brake body and the movable frame and serving to move the movable frame away from the brake body and press the brake pad attached to the movable frame against the brake surface (6). A gap (9) is provided between the movable frame surface (7) oriented in the direction of motion of the movable frame (2) and a counter surface (8) oriented in a corresponding direction, in which gap (9) is fitted a damping element (10) which is in contact with both surfaces to damp the motion of the movable frame.

Abstract: Holding brake for a traction sheave elevator, comprising a brake body (1), a movable frame (2) movably mounted in the brake body, a brake pad (3) attached to the movable frame, a pulling element (4) mounted on the brake body for pulling the movable frame toward the brake body and a compressing element (5) mounted between the brake body and the movable frame and serving to move the movable frame away from the brake body and press the brake pad attached to the movable frame against the brake surface (6). A gap (9) is provided between the movable frame surface (7) oriented in the direction of motion of the movable frame (2) and a counter surface (8) oriented in a corresponding direction, in which gap (9) is fitted a damping element (10) which is in contact with both surfaces to damp the motion of the movable frame.

Abstract: Brake shoe for a traction sheave elevator, comprising a brake body (1), a brake shoe (2) attached to the brake body, a retractor (4) in the brake body for keeping the brake shoe clear of a brake wheel (5), and a mechanical pressure element (6) for pressing the brake shoe against the brake wheel. Moreover, the holding brake comprises an intermediate frame (7) disposed between the brake body (1) and the brake shoe (2), the pressure element being arranged to apply a pressure on the intermediate frame. The holding brake further comprises adjusting elements (8) between the intermediate frame and the brake shoe to allow adjustment of the position of the brake shoe in relation to the intermediate frame when the air gap (3) between the brake shoe and the brake wheel is being adjusted.

Abstract: A spring-set, centrifugally released brake for a linear actuator is provided. The brake includes a drum or ring that is disposed radially outward of a shaft extending from the actuator's motor. The brake also includes a drive plate that is mounted to the shaft for rotation therewith. The brake further includes a pair of brake shoes disposed radially outwardly of the shaft and having radially outer portions disposed radially outwardly of the drum. Finally, the brake includes a pair of compression springs disposed within hollows in the drive plate. The springs are supported at one end by the drive plate and at the other end by one of the brake shoes. The springs urge the brake shoes radially inward when the actuator is at rest and cause the radially outer portions of the brake shoes to engage a radially outer surface of the drum.

Abstract: An elevator traction sheave brake for use on a counter-balanced elevator. The brake comprises a controllable friction member which when released from its running position is compressed against the traction sheave and is capable of providing a braking torque in accordance with a preset braking profile whereby uncontrolled rotation of the traction sheave is prevented.

Abstract: A variable centrifugal brake comprises a driven shaft carrying a disc with centrifugally-acting bob weights which bear against an axially displaceable bush, which in turn bears against a forked lever assembly, in turn bearing against a further lever carrying a friction lining engaging the periphery of the disc. The brake may be used in an exercise machine having a drum around which a pull cord is wound and a transmission for transmitting drive from the drum to the shaft of the brake.

Abstract: A brake system for braking a shaft of an apparatus subject to runaway to stop runaway. The system comprises a brake drum on the shaft, one or more brake shoe(s) engageable with and disengageable from the drum, and a control member connected to the brake shoe(s) movable in one direction to a first position for applying the brake shoe(s) and in the opposite direction to a second position for releasing the brake shoe(s). The control member is biased to its first position for applying the brake shoe(s), and a torque motor is connected to the control member for moving the control member on energization of the torque motor to the second position and holding it there for release of the brake shoe(s). A device responsive to runaway of the apparatus for de-energizing the torque motor is provided, the control member being released on de-energization of the torque motor for applying the brake shoe(s) to the drum.

Abstract: A gravity assisted anti-reverse rotation device for preventing reverse rotation of pumps and the like.A horizontally mounted pawl is disposed to mesh with a fixed ratchet preventing reverse rotation when the pawl is advanced into intercourse with the ratchet by a vertically mounted lever having a lumped mass. Gravitation action on the lumped mass urges the pawl into mesh with the ratchet, while centrifugal force on the lumped mass during forward, allowed rotation retracts the pawl away from the ratchet.

Abstract: A mechanical antiskid regulator has a flywheel mass which is journalled for rotary movement independent of the axle and wheel and is provided with a cam received in a recess of a cam disc coupled to rotate with the wheel on the axle. Two locking elements are pivotally connected to a ring segment and are suspended from the cam disc so as to be positioned on either side of the central position of the cam. A rotatably mounted stop is engageable from either direction of rotation with the ring segment to displace the ring segment so as to move a portion of a locking element into the path of the cam to prevent the flywheel mass from deflecting in that direction.

Abstract: A casting reel spool speed control device comprises a disc member for rotation with a reel spool within, spaced from and relative to a cylindrical housing secured to a reel cage. Two or more pawl-shaped speed control fingers are freely, pivotally mounted in slots opening onto the rim of the disc member to move under the combined counter-balancing influence of centrifugal force and air resistance between retracted positions in the slots and deployed positions in which the bevelled finger tips lightly brush or just clear the inner circular surface of the cylindrical housing. The speed control or braking action is very light and is just sufficient to cure the problem of reel overrun during casting upwind.