Abstract: A circle drive for rotating a blade on a draft frame of a motor grader includes a circle gear mounting the blade, a worm wheel, a torque dividing arrangement, and a single input provided on a first shaft. The torque dividing arrangement includes a set of shafts positioned about the worm wheel, a torque dividing gear set, and a set of worm gears meshed with the worm wheel. The worm wheel is operatively coupled to drive the circle gear. The set of worm gears includes a first worm gear on a first shaft and a second worm gear on a second shaft. The single input is configured to provide a driving torque that drives the set of worm gears such that the set of worm gears divides the driving torque. The driving torque is capable of driving the worm wheel for driving the circle gear and rotating the blade.

Abstract: A hoist is provided with a braking mechanism comprising: a motor cover that is provided with an outer wall which is provided such that the inner diameter of an inner peripheral portion thereof increases with proximity to one side in the axial direction from the other side; a drum member that is provided with an outer peripheral portion which is located radially inward of the inner peripheral portion of the outer wall and which faces the inner peripheral portion; and a brake shoe that is mounted on the outer peripheral portion. The inner peripheral portion is provided with a blast-treated portion which is blast-treated upon impact by media which contains large amounts of sharp edges among media which contains large amounts of sharp edges and media which contains large amounts of non-sharp edges.

Abstract: A fall arrest device includes a bracket, a rotating member rotatably mounted to the bracket, a safety belt wound around the rotating member, a brake wheel connected to the rotating member, a brake block pivotally connected to the brake wheel, and a restoring spring fitting around the second segment and having one end thereof terminating in a ring that has an inner diameter smaller than an outer diameter of the first segment. Another end of the restoring spring is connected to the brake block. The brake wheel has a fixed rod having a first segment and a second segment. An outer diameter of the first segment is greater than an outer diameter of the second segment. The restoring spring urges the brake block to be located in a restoring position. Thus, the restoring spring could be prevented from falling out of the fixing rod.

Abstract: A winch is provided including a rotatable drum and a gear train drivingly connecting a motor to the rotatable drum. The gear train includes a clutch that is operable to be disengaged to allow the rotatable drum to free spool. A clutch actuator is provided for disengaging the clutch and the clutch includes a pivoting pawl having a first end that engages a clutch dog of a planetary ring gear and the clutch actuator includes an electro-magnetic solenoid having a plunger that engages a second end of the pivoting pawl.

Abstract: An overspeed braking mechanism for a stairlift includes: a main shaft driven by a motor to rotate; a claw member connecting with the main shaft to thereby rotate synchronously with the main shaft and having a tooth; a cam member connecting with the claw member and having an abutting portion spaced apart from the tooth of the claw member radially by a predetermined angle; a driven unit having a cam contact portion, wherein the abutting portion of the cam member abuts against the cam contact portion to cause the driven unit to swing, whereas a pawl portion of a claw contact member engages with the tooth of the claw member and has a switch contact portion; and a micro switch adapted to be touched by the switch contact portion, controlling the motor to drive the main shaft to rotate.

Abstract: A safety device for use in a fall arrest system, has a safety line drum mounted for rotation and a speed responsive engagement mechanism responsive to the speed of rotation of the drum, which is activated above a predetermined rotational speed of the drum to deploy an energy absorber. A rotational transmission member (which may be in the form of a shaft) is coupled, via the speed responsive engagement mechanism, when activated, to rotate with the drum. The energy absorber is deployed in response to operation of the rotational transmission member. The speed responsive engagement mechanism may be mounted intermediate the drum and the energy absorber for ease of replacement.

Abstract: An actuator drive, for blinds, roller shutters and the like, has a drive motor and a centrifugal brake. A rotational disk is coupled to a drive shaft of the drive motor via a shaft flange. Two centrifugal shoes are smoothly guided in the rotational disk. In the unpowered state, brake shoes of the centrifugal shoes engage, frictionally or in a positive-locking way on an outer surface of a friction ring fixed to the motor housing. Upon starting of the drive motor, the brake shoes release the friction ring. The radial displacement of the brake shoes is maintained until the drive motor comes to a stop, wherein the brake shoes 8 are drawn radially inward by spring elements and function again as a locking mechanism. The spring elements are pretensioned such that the brake shoes effect a sufficient retaining torque.

Abstract: A safety device for use in a fall arrest or fall safety system includes an energy absorber to absorb energy in the event of a fall or other impulse event. The energy absorber is a resilient element (such as a tolerance ring) providing an interference fit between a first component of the device and a second component of the device. In the event of a fall arrestor other impulse event, the first and second components effect movement relative to one another, the interference fit being overcome, and the resilient element/tolerance ring acting to resist the relative movement thereby absorbing energy.

Abstract: A device for reducing an actuation force spike in an elevator car safety system. The device includes an elevator car mounted overspeed governor, a safety gear, a safety lever, and a force reducing mechanism. The force reducing mechanism is connected in a series relationship with the safety lever between the overspeed governor and the safety gear.

Abstract: A fall arrest block has a drum (40) on which a lifeline is wound and from which the line can be drawn off or drawn back on, as the work man moves towards and away from the block. One end of the lifeline is permanently secured to the drum, and the drum has sockets (50) for securing ends of more than one different type of lifeline. The block also has a brake (24) in the form of a sealed unit which can be removed and replaced with a fresh unit, when servicing of the brake is required.

Abstract: A power tool braking device of a portable power tool includes at least one braking unit configured to brake a movement of a working tool at least in one operating mode. The at least one braking unit includes at least one rolling-contact element configured to activate at least one braking mode of the at least one braking unit.

Abstract: A catch device, for example in a safety device of an elevator mechanism, includes at least one first force store element and one second force store element having different force storage rates, and a displacement limit for the first force store element.

Abstract: A safety stop is provided for stopping a movable member having at least one set of opposed wheels for gripping a rail. The stop has a track on each of opposite sides forming a wedge shape of a narrow end progressively widening to a wide end in a direction of travel of the movable member. With the opposed wheels of the movable member respectively at opposite sides of the wedge shape member, the tracks of the wedge shape member engage and impart a spreading strain to the opposed wheels as the movable member moves in the direction of travel. The opposed wheels of the movable member comprise a deformable material to absorb the kinetic energy of the movable member. The tracks of the stop additionally may have undulating features comprising concave and convex surfaces in the direction of motion.

Abstract: A system for determining if a tire of a vehicle is improperly inflated. The system includes a radar, a wheel speed sensor, and a controller. The radar is configured to emit a signal to detect a reflection of the signal off of an object positioned perpendicular to the vehicle, and to output an indication of a speed of the vehicle. The wheel speed sensor is configured to sense a speed of a wheel of the vehicle. The controller is configured to receive the indication of the speed of the vehicle from the radar, to calculate a speed of the vehicle based on the sensed speed of the wheel, and to determine a tire of the wheel is improperly inflated when the speed of the vehicle calculated using the wheel speed sensor varies by more than a predetermined amount from the speed of the vehicle determined using the radar signal.

Abstract: A constant strain spring compensation device, mainly comprising the grooved pulley, compensation cable, left end plate, spindle, oil seal, bearing, right end plate, contact flat spiral spring, housing, fastening angle steel, mounting base, pin, and wire-breaking arresting device. Said grooved pulley is fixed on the spindle, said compensation cable is wound and one of its ends is fixed on the grooved pulley, and the other end is connected to exterior overhead contact lines. Said spindle is supported on left end plate and right end plate by using the oil seal and bearing. Said left end plate, right end plate, housing, fastening angle steel, and mounting base form a closed box base. Said pin is connected to the side of the mounting base remote from said box base. Said contact flat spiral spring is arranged within said box base with the inner end hook being connected to the spindle and the outer end hook being connected to the fastening angle steel of the box base.

Abstract: A safety stop is provided for stopping a movable member having at least one set of opposed wheels for gripping a rail. The stop has a track on each of opposite sides forming a wedge shape of a narrow end progressively widening to a wide end in a direction of travel of the movable member. With the opposed wheels of the movable member respectively at opposite sides of the wedge shape member, the tracks of the wedge shape member engage and impart a spreading strain to the opposed wheels as the movable member moves in the direction of travel. The opposed wheels of the movable member comprise a deformable material to absorb the kinetic energy of the movable member. The tracks of the stop additionally may have undulating features comprising concave and convex surfaces in the direction of motion.

Abstract: A brake actuator has a motor that provides input rotation in first and second directions. A reducer couples to the motor and reduces the input rotation into an output rotation to be applied to a brake screw of a progressive cavity pump drive. A sensor measures rotational speed of the drive shaft. In manual operation, an operator can view an indication of the rotational speed and can manually operate the motor accordingly to control rotation of the shaft. In automated operation, a controller automatically controls the motor based on the rotational speed measured by the sensor. The controller can also use a torque sensor to detect the torque applied to the brake screw, a displacement sensor to detect displacement of the brake screw, and/or a current sensor to detect the current consumption of the motor.

Abstract: An abseiling device for braking a load (16) that is suspended on a rope (14) and may be fastened to the abseiling device (10), with which the rope (14) passes through the abseiling device (10) and is frictionally guided along a section (22), at least one portion of the section (22) being guided by a part (25) of the abseiling device (10) that is movable out of an unloaded starting position relative to a housing (12) of the abseiling device; when a load is suspended, the part (25) generates a frictional force that is a function of the weight of the load (16).

Abstract: The invention relates to an overspeed detection mechanism in lift apparatuses, safety device acting against overspeed and a lift apparatus, which detection mechanism can be assembled on a sheave or on the elevator car. It incorporates a wheel rotating according to the speed of the car and has pivoting arms swinging through the centrifugal force during the rotation of the wheel. It has magnetic means associated to the pivoting arms causing an attraction maintaining the position of the pivoting arms until the centrifugal force exceeds the attraction of the magnetic means. It incorporates a stop, belonging to a part external to the wheel against which the pivoting arm comes into contact when the centrifugal force generated on the pivoting arm due to the overspeed of the elevator car exceeds the attractive force of the magnetic means, starting the braking of the car.

Abstract: An elevator installation has braking equipment for braking and holding an elevator car which moves in vertical direction within guide tracks or rails. The braking equipment consists of at least two brake units each comprising a normal force regulation device that sets a normal force (FN) in correspondence with a normal force value determined by a brake control unit and/or a locking device that locks the brake unit in a set braking position and which preferably maintains the set braking position in the case of an interrupted energy supply. The braking equipment provides a gentle braking or holding of the elevator car, which corresponds with the operational state of the elevator installation, with a low energy requirement.

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: A transmission mechanism having a deceleration function includes a guide screw, a worm wheel set, an intermediary ring, an isolator and a passive sleeve. The worm wheel set is fitted onto the guide screw and includes worm wheel and plural claw arms. A spacing slot is formed between any two adjacent claw arms. The intermediary ring is fitted onto a peripheral edge of each claw arm. The isolator surrounds a peripheral edge of the intermediary ring with one side fixed to an actuator. With plural grooves arranged on a peripheral edge thereof, the passive sleeve is fitted onto the guide screw. An accommodation space is formed among the groove, spacing slot and intermediary ring. Each needle roller is accommodated in the accommodation space and inter-contacted with the claw arm, the intermediary ring and the passive sleeve.

Abstract: Herein is disclosed a preassembled and pretorqued friction brake comprising at least a pressure plate, a ratchet ring, a friction ring, and a backing plate.

Abstract: When swaying motions of a trailer or semi-trailer of a car-trailer combination are encountered, input signals which are taken into consideration to calculate a reference signal frequently include also oscillation components, due to which driving dynamics control for stabilization of the car-trailer combination can become very unreliable. To enhance the reliability of driving dynamics control of this type, a method is disclosed in which an input signal (Y) is sensed that includes signal oscillations which are due to a swaying motion of the trailer or semi-trailer and are superimposed on a base component (YBasis) of the input signal (Y). A reference signal is calculated from the input signal (Y), in which case the calculation is executed in such a way that the reference signal by approximation corresponds to a reference signal which is determined from the base component (YBasis) of the input signal (Y).

Abstract: A catch device, for example in a safety device of an elevator mechanism, includes at least one first force store element and one second force store element having different force storage rates, and a displacement limit for the first force store element.

Abstract: A braking device for an elevated platform assembly comprising a platform moveable along a generally vertical mast supporting an upright rack comprises an input gear assembly in mating engagement with the rack, a centrifugal actuator communicating with the input assembly and a spring-loaded brake responsive to the centrifugal actuator. The spring-loaded brake engages the rack and arrests the platform when the platform descends the mast at a rate above an upper threshold limit.

Abstract: A brake actuator has a motor that provides input rotation in first and second directions. A reducer couples to the motor and reduces the input rotation into an output rotation to be applied to a brake screw of a progressive cavity pump drive. A sensor measures rotational speed of the drive shaft. In manual operation, an operator can view an indication of the rotational speed and can manually operate the motor accordingly to control rotation of the shaft. In automated operation, a controller automatically controls the motor based on the rotational speed measured by the sensor. The controller can also use a torque sensor to detect the torque applied to the brake screw, a displacement sensor to detect displacement of the brake screw, and/or a current sensor to detect the current consumption of the motor.

Abstract: A fan rotor is mounted on a shaft carried on bearings attached to a base plate and there is provided an assembly for preventing reverse rotation of the fan which could damage the motor. A stop plate is mounted on the base adjacent the shaft with an edge adjacent the shaft. A pair of wing members are carried on the shaft on two collar pieces so that each wing member is pivotal between ends of the collar pieces about an axis parallel to the tangent to the shaft at the wing member. The wing members are V-shaped and pivot so that one leg moves under gravity either in the vertical or horizontal orientations of the shaft from a retracted position, in which it is free from the stop plate to an extended position in which it engages the abutment surface of the stop member to prevent reverse rotation. The wing members are shaped and weighted such that rotation of the shaft beyond a predetermined angular velocity causes centrifugal force to move the wing members to the retracted position.

Abstract: A safety brake device has a setting device moving an abutment or a housing to limit movement of brake wedges engaging a guide rail which limits a braking force applied by the brake wedges. The setting device can continuously adjust the braking force limit in dependence on a magnitude of a mass to be braked.

Abstract: The invention relates to a brake actuator, especially for a rail vehicle brake, comprising an accumulation brake unit having an energy accumulator for storing and supplying energy for applying the brake, preferably in the event of safety braking and/or park braking, and a locking device for locking and unlocking the energy accumulator. After the release of the locking device, an inertia weight from part of the energy released from the energy accumulator can be subjected to a rotational movement for damping purposes.

Abstract: A centrifugally activated device for controlling the speed of movement of an elevator cab includes the capability of controlling upward and downward movement. A first stopping device is associated with at least one elevator sheave. A second stopping device preferably is supported on an opposite side of the same sheave. The second stopping device preferably includes centrifugally activated components such as a latch member that moves from a first position into a second, stopping position responsive to an undesirably high speed of upward movement of the elevator cab. The centrifugally activated components preferably include a latch member that is rotatably supported on the sheave and has an engaging member at one end that engages a cooperating stop surface near the sheave to prevent the sheave from further rotation upon the sheave reaching an undesirably high rate of rotation.

Abstract: The present invention relates to an overspeed governor for a stairlift and is characterised in that it can operate in two opposite directions. This means that the same device can be fitted to stairlifts regardless of whether the stairlift installation is left or right handed.

Abstract: To accurately detect a trouble of a magnetic brake (2) by eliminating any effect of a temperature of a location at which an elevator is installed, a temperature sensor (3) is arranged to measure a temperature of the magnetic brake (2). When an armature (2c) has been attracted responsive to a brake release command, the temperature of the magnetic brake is measured as a first temperature, and before the armature returns responsive to a brake actuation command, the temperature of the magnetic brake is measured as a second temperature. The first and second temperatures are compared with each other. When a result of the comparison between the first and second temperatures is determined to be greater than a predetermined value, the magnetic brake (2) is determined to have been locked and hence, to have developed a trouble.

Abstract: The provision of a rotational speed controller which is capable of increasing braking torque without a corresponding increase in size, and easily outputting braking torque assumed in the design, and minimizing variations in the braking torque. A casing 6 incorporates a shaft 7 inserted therein, a first rotor 8 rotated together with the shaft 7 in one piece, and a second rotor 10 rotated through the medium of the first rotor 8 and a planet gear 9. A first rotation mechanism for rotating the first rotor 8 is the shaft 7. A second rotation mechanism for rotating the second rotor 10 is a planetary gear mechanism operated in association with the rotation of the first rotor 8.

Abstract: In a speed governor linkage mechanism that is displaced by centrifugal force acting on rotary weights, a balancing weight is provided in addition to speed adjustment spring for generating balancing force in opposition to the centrifugal force. When the speed of the cage is less than a prescribed speed, restraint of movement of the speed governor linkage mechanism is performed solely by the balancing force produced by balancing weight but when the speed of the cage exceeds said prescribed speed, restraint of movement of the speed governor linkage mechanism is performed by both the balancing force produced by the balancing weight and the balancing force produced by the speed adjustment spring.

Abstract: A brake for a hoist, includes a brake disk and a magnetic filed which is aligned transversely to the brake disk and generates a reactive force which inhibits a movement of the brake disk and is dependent on the rotation speed of the brake disk as well as a radial distance from the rotation axis. The magnetic field is formed by two magnetic poles arranged on both sides of the brake disk.

Abstract: A rotary actuated overspeed safety device is provided for elevators. The overspeed safety device comprises a pair of pivotally mounted counterweights linked by a pivotally attached coupling rod and a wheel that rollably engages a guide rail. The counterweights are pivotally mounted to the wheel in a parallel plane configuration. Centrifugal force causes the pivotally mounted counterweights to pivot outward toward an actuator as the wheel spins. The overspeed safety device is triggered when the pair of pivotally mounted counterweights engages an actuator. The actuator is a housing that is engagably connected to an elevator safety.

Abstract: A shock absorber for a shaft. The shock absorber comprises a collar having an opening receiving the shaft. A clearance gap is defined between the collar opening and the shaft. A pin offset from the axis connects the collar to a shoulder on the shaft. A resilient o-ring arranged in the clearance gap engages the collar and the shaft. In operation, the collar and the shaft rotate in unison. However, when the collar accelerates or comes to a sudden stop, the resilient o-ring compresses to provide the shock absorption. The shock absorber may be incorporated into a rotary actuator. In a rotary actuator, the collar includes a stop tab that rotates between two stop surfaces of the actuator housing. When the stop tab strikes one of the stop surfaces, the resilient member compresses thereby absorbing and reducing impact force. Compression in the resilient member is snubbed via mechanical stops.

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: A rotary actuated overspeed safety device for elevators. The overspeed safety device comprises a pair of pivotally mounted counterweights linked by a pivotally attached coupling rod and a wheel that rollably engages a guide rail. The counterweights are pivotally mounted to the wheel in a parallel plane configuration. Centrifugal force causes the pivotally mounted counterweights to pivot outward toward an actuator as the wheel spins. The overspeed safety device is triggered when the pair of pivotally mounted counterweights engages an actuator. The actuator is a housing that is engagably connected to an elevator safety.

Abstract: Eddy current braking apparatus includes a linear array of spaced apart permanent magnets arranged for defining a slot therebetween. A diamagnetic or non-magnetic fin is disposed and sized for movement through the slot. A pivotal linkage enables the magnets to move with respect to the fin from a spaced apart first position to a second position in which the fin passes through the slot. A control mechanism selectively moves the magnets between the first and second positions.

Abstract: A method for controlling the speed of an off-the-road vehicle traveling on a gradient permits a constant downhill speed to be maintained. The vehicle speed can be set to a constant descending speed by an electronic system through active braking intervention, without requiring actuation of the brake by the driver. The vehicle in which the method is practiced has several forward speeds and one reverse speed within a low-range traveling phase. The constant descending speed is dependent upon the position of the gas pedal and upon the currently engaged gear of the low-range traveling phase. The method for use in off-the-road vehicles is particularly advantageous for situations in which the braking action of the engine on steep gradients is no longer sufficient to decelerate the vehicle.

Abstract: An apparatus for controlling rotation of an outer sleeve member relative to an inner cylindrical duct member is used in a drilling system for controlling steering of a downhole drilling tool. The apparatus includes an annular swash plate pump and a stack of annular brake disks in the space between the members. The pump is driven by the rotation to pump fluid into a supply cylinder driving the brake. An orifice controls escape of the fluid from the chamber at a controlled rate. The rate is controlled to maintain a balance between the pumping rate and the brake pressure to keep the rotation at a required rate. The apparatus is used in the drilling system which includes a shallow bend in the drilling tool and a system for rotating the bent drilling tool slowly about a longitudinal axis of the drilling tool while the drill bit rotates more rapidly. The controlled orifice further allows the slow rotation to be halted at a predetermined orientation of the bend axis so as to effect a change in drilling direction.

Abstract: A braking apparatus for a fishing reel and a braking element assembly preferred for use in the inventive apparatus. The inventive braking apparatus comprises: a contacting structure; a plurality of braking elements for contacting the contacting structure to generate a braking force; a dial and cam slider assembly for selectively placing the contacting structure in a plurality of predetermined positions relative to the braking elements; and an indexing structure for identifying the predetermined positions. The inventive braking element assembly preferably comprises: (a) a housing having a longitudinal axis and a longitudinal end and (b) a plurality of braking elements retained in the housing for radial braking movement relative to the longitudinal axis. A first and second one of the braking elements are each retained in the housing at a first longitudinal position spaced a first longitudinal distance from the first end.

Abstract: A process for controlling the speed of a vehicle travelling on a slope is disclosed. The vehicle is equipped with an electronic system which, through active brake intervention, adjusts the speed of the vehicle to a predetermined constant hill descent speed upon actuation of a hill descent control mode. The process comprises generating in the electronic system a continuously variable desired speed, and upon actuation of said hill descent control mode, the desired speed is continuously adjusted until it is equal to the predetermined constant hill descent speed. While the desired speed is being adjusted, the vehicle speed is continuously adjusted through active brake intervention until it is equal to the desired speed, so that after a transition period, the vehicle speed is equal to the predetermined constant hill descent speed.

Abstract: A braking apparatus for a fishing reel comprising: a plurality of braking elements; a braking element assembly for retaining the braking elements in radial paths about a rotational axis such that a centrifugal force imparted to the braking elements by rotating the braking elements about the rotational axis will urge the braking elements to move in their radial paths away from the rotational axis toward individual, extended radial positions; a contact member; and a positioning mechanism for selectively positioning the contact member in at least a first location and a second location. When the contact member is positioned in its first location and the braking elements are in their extended radial positions, at least one of the braking elements contacts the contact member. However, when the contact member is positioned in its second location, the one braking element just mentioned cannot contact the contact member, regardless of whether the braking element is in its extended radial position.

Abstract: A brake system for gradual, uniform and jerk-free deceleration of a load, such as a railway car, can have a motor which is operable to store force in a spring and which force is applied in a force-transmitting chain including a measuring spring to a brake element. The displacement of the measuring spring is translated into a displacement of the wiper of a variable resistor connected in a common adjustable branch of a Wheatstone bridge with a setpoint resistor and with an inverse characteristic resistor. The two latter resistors have pairs of terminals to which control currents are applied and a switch is provided to alternatively shunt one or the other of the two pairs of terminals.

Abstract: The variable centrifugal brake is used for providing a load and for dissipating energy coming from a power input. The brake comprises a frame provided with a driven hub connectable to the power input. A floating plate is mounted on the hub with one side closely facing a contact surface on the frame. A cam bearing plate is further mounted on the hub and closely facing an opposite side of the floating plate. At least one cam assembly, radially pivotable around a pivot axis, is mounted on the cam bearing plate. Each cam assembly comprises a pressing portion adjacent to the pivot axis for lifting and lowering the floating plate as the cam assembly pivots around the pivot axis. The floating plate is then pressed against the contact surface by the pressing portion as the cam assembly pivots beyond a threshold angle and with a force proportional to the rotation speed of the cam assembly and to the position of flyweights connected along an elongated portion substantially projecting below the pivot axis.

Abstract: A safety mechanism for preventing a cable drum to rotate with overspeed has parallel ratchet wheels which encircle a brake drum. At a periphery of the ratchet wheels are stopping slots wherein a latching pawl is inserted when an overspeed is detected. The slots of the adjacent ratchet wheels are staggered. Thus the braking effect of each ratchet wheel starts at a different point of time.

Abstract: An asymmetry/overspeed brake unit designed to stop the rotation of a control surface and its attending drive set and attachment hardware in response to a mechanical overspeed condition or an electrical signal from a flight control computer. The asymmetry/overspeed brake unit comprising a brake housing having a rotatable main shaft running axially therethrough and a locking mechanism, a braking mechanism, a mechanical trip mechanism, and an electrical trip mechanism, all contained within the brake housing. The asymmetry/overspeed brake unit further comprising a mechanical reset mechanism and a trip indication mechanism, both contained within the brake housing.