Abstract: A braking mechanism includes a wedge selectably engageable with a guide rail, and a frictional surface defined on the wedge configured for selective engagement with the guide rail in an overspeed condition. The frictional surface includes a friction coating of polycrystalline blocky diamond material. An elevator system includes an elevator car, a guide rail along which the elevator car travels, and a braking mechanism located at the elevator car and selectably engageable with the guide rail to slow or stop travel of the elevator car along the guide rail. The braking mechanism includes a wedge having a frictional surface configured for selective engagement with the guide rail in an overspeed condition. The frictional surface includes a friction coating of polycrystalline blocky diamond material.

Abstract: A device for locking an object suspended from a cable passing through a clamp and extending along a substantially vertical axis, the clamp includes a fixed part, at least two moving jaws, a first actuator and a second actuator, the two jaws coming into contact with the cable to immobilize the cable by clamping in a closed position and moving away from the cable in an open position, the fixed part having as many inclined surfaces as there are jaws, each of the jaws being configured to slide along one of the inclined surfaces so as to pass from the open position to the closed position, the first actuator being configured to move the jaws upward, make them slide along their respective inclined surface and allow the clamp to close, the second actuator being configured to pull downward on the cable with respect to the fixed part and allow the clamp to open.

Abstract: A device for an extensible and compressible friction-based damper which selectively resists stroking in a first direction while freely sliding in the opposite direction. Resistance is proportional to an adjustable and pre-settable value, which provides and adjustable static-hold capability. Sliding resistance being substantially independent of the relative position, velocity, acceleration or jerk (d3x/dt3) imposed upon it. Dampers according to the present disclosure can eliminate resonance amplification when combined with other conventional suspension components. The damper may be used in applications such as isolation mounts. Also disclosed is a method for a high-performance isolation mount to protect a Payload (persons or equipment) from mechanical shock and vibration, incorporating one or more dampers according to the present disclosure together with one or more elastic elements. A device made according to the present disclosure is dubbed a Smooth Transient Excursion Non-Resonant (STEN-R) Damper.

Abstract: A spool may include a drum rotatably supported on an axle shaft and flanges integrally formed with opposite ends of the drum. The drum has a continuous groove on the outer surface of the drum to guide the movement of the safety wireline. Both of the flanges may include an opening, internal threads circumscribing the opening, and a plurality of mechanical brakes. Each of the mechanical brakes may include a rotor rotatably supported on the axle shaft of the spool and a pawl arranged within the opening. The pawl is pivotally linked to the rotor such that when the rotation of the axle shaft is in a direction and at a rotation speed that exceeds a threshold then the pawl is moved by centrifugal force and engages with the internal threads circumscribing the opening and does not permit the spool to rotate.

Abstract: A safety brake includes a first brake element, a first guide element, and an actuating element. The first brake element is mounted in a displaceable manner in a linear bearing on the first guide element. The first guide element can be moved between a rest position and a braking initial position. The actuating element is designed to move the first guide element from the rest position into the braking initial position, more particularly to activate the safety brake. The first brake element can carry out a braking movement from the braking initial position into a braking position. The braking movement returns the first guide element to the rest position. The first guide element is guided on a first parallelogram guide.

Abstract: A catching device for a traveling body in an elevator system and a method for unblocking the catching device include at least two retaining units that can be brought into a blocked state and into an unblocked state, the retaining units retaining the traveling body on a rail in the blocked state. The retaining units are connected to the traveling body such that each of the retaining units and the traveling body can be slid relative to each other within a limited sliding displacement. A first sliding displacement of a first of the retaining units is longer than a second sliding displacement of a second of the retaining units.

Abstract: A running wheel for a patient positioning device (30) is provided. The running wheel has a wheel (1) and a receiving device (4) for rotatably receiving the wheel (1) around a first rotational axis (5), which is arranged centrally with respect to a circumference of the wheel (1). The wheel (1) has a wheel body (3), and multiple circumferential castors (7), each having a second rotational axis (8) arranged in a direction tangential to a circumference of the wheel (1), wherein the circumferential castors (7) form a bearing surface of the wheel (1).

Abstract: A linear-motion brake system uses a fixed block, a moving block, and a linear-motion resistance assembly to decelerate a user who is tethered to the system via a force-transfer line. The linear-motion resistance assembly is a compressible component that exerts a force on the force-transfer line that opposes the force generated by the user traveling along a zipline. The moving block and the fixed block are positioned on opposite sides of the linear-motion resistance assembly, such that the moving block compresses the linear-motion resistance assembly when impelled by the force-transfer line. The force transfer line is threaded through a pair of guide channels that run along the linear-motion resistance assembly. One end of the force-transfer line is tethered to the fixed block while the opposite end is tethered to the user. Thus, the user's motion is transferred to the moving block and resisted by the linear-motion resistance assembly.

Abstract: In one aspect, a clamp for installation onto an elevator car as part of an emergency braking system comprises: a clamp body having an L-shaped profile with a vertical portion for attachment to an elevator car wall of the elevator car and horizontal portion for attachment to an elevator car roof or an elevator car floor of the elevator car; and a pair of opposing brakes disposed on the vertical portion of the clamp body for clamping a mine shaft guide between the brakes for emergency braking. In another aspect, a method of activating an emergency brake of an elevator car comprises: sensing a load of the elevator car; based on the sensed load, dynamically determining a rate at which an emergency brake shall be incrementally engaged; and upon detecting a freefall or overspeed condition of the elevator car, incrementally engaging the emergency brake at the dynamically determined rate.

Abstract: Elevator braking systems. The elevator braking system comprises a wedge having a curved wedge bearing race and a clamping jaw having a curved jaw bearing race. The elevator braking system includes a roller bearing assembly. The assembly has two cages and a spacer maintains a space between the two cages. A plurality of rollers is rotatably coupled to the two cages. Each of the plurality of rollers is barrel shaped. A first side of the roller bearing assembly is configured to be coupled to the wedge via the curved wedge bearing race. A second side of the roller bearing assembly is configured to be coupled to the clamping jaw via the curved jaw bearing race.

Abstract: An elevator electrical safety actuation system and method are provided. The system includes an actuation device configured to operate a brake device. The actuation device includes a locking mechanism (542), a first portion (534) configured to be engaged and retained by the locking mechanism (542) in a first portion-first state and moveable to a second state wherein the first portion is not retained by the locking mechanism (542), a second portion (536) in contact with the first portion (534) when the second portion (536) is in a second portion-first state and the first portion (534) is in the first portion-first state, the second portion (536) moveable to a second portion-second state, wherein the second portion (536) is operably connected to the brake device, and a resetting mechanism (546) configured to force the first portion (534) from the first portion-second state to the first portion-first state.

Abstract: An exemplary elevator braking device comprises a brake housing. A plurality of rollers are supported by the brake housing. The rollers are arranged to be positioned on opposite sides of a guiderail. The rollers are selectively moveable between a first position in which the rollers are spaced apart a first distance and a second position in which the rollers are spaced apart a second, smaller distance so that the rollers engage and roll along opposite sides of the guiderail. At least one biasing member is supported by the brake housing. The biasing member is associated with at least one of the rollers and biases the associated roller toward the other roller in the second position. A plurality of braking surfaces are supported by the brake housing. At least one braking surface is associated with each of the rollers. Each braking surface engages a periphery of the associated roller that faces the side of the guiderail.

Abstract: An elevator cage is movable along at least two guide rails and the elevator cage is equipped with a braking system. The elevator braking device has a brake housing and a force store. The brake housing is mounted to be displaceable between a first position and a second position. The force store acts on the brake housing and pushes the brake housing in the direction of a second position. In addition, the elevator braking device includes an actuator which can act on the brake housing and keep the brake housing in a first position. The actuator in its first setting can hold the brake housing in the first position against the force of the force store. In a second setting the actuator enables pushing of the brake housing into the second position. A brake element is thereby brought into contact with the brake rail.

Abstract: A speed restricting wheel assembly is provided. The speed restricting wheel assembly includes: a casing of which one side is partially open and forms a circular accommodating hole eccentric from a center; a rotation rotor which is inserted inside the accommodating hole and rotates in an interlocked manner with the casing in a state where it is eccentric from a rotation center of the casing, but which also forms a rotation space inside and a plurality of internal gear teeth dented radially from the rotation space; a sun gear accommodated inside the rotation space and has a plurality of protruding external gear teeth in contact with the internal gear teeth and an axis member mounted onto a rotation center accommodated inside the rotation hole; and a resistance fluid which is accommodated in a space between the external gear teeth and internal gear teeth.

Abstract: In an elevator installation an elevator cage is movable along at least two guide rails and the elevator cage is equipped with a braking system. An elevator braking device includes a brake element, a force store, which is constructed to press the brake element against the brake surface, and an actuator, which can act on the brake element and which is constructed in order to press, in a first operational setting, the brake element against the force of the force store away from the brake surface or to hold it at a spacing therefrom and in order to free, in a second operational setting, pressing of the brake element against the brake surface.

Abstract: A mechanism for use in an elevator governor assembly including a ground configured to rotate about a ground axis, three or more circumferentially overlapping cams each pivotally attached to the ground at one of three or more ground pivot points radially spaced from the ground axis, and a plurality of links pivotally attaching the three or more cams to one another at a plurality of link pivot points. The circumferentially overlapping cams form a substantially contiguous circular ring about the ground axis. The interconnection of the ground, the cams, and the links form a generally circular mechanism.

Abstract: A braking device (2) for braking a lift car which moves relative to a lift shaft, having at least one braking module (6) which is provided in order to interact with a device, and having a catch (4) which can be adjusted between two operating positions (36, 360, 38), wherein the catch (4), in a first operating position (36, 360), is connected to the at least one braking module (6) such that the catch (4) transmits a release force (22) to the at least one braking module (6), and wherein the catch (4), in a second operating position (38), is separated from the at least one braking module (6), and the at least one braking module (6) is therefore in contact with the device.

Abstract: An elevator car braking apparatus includes a gear drive assembly for compressing one or more springs which are coupled by a cam follower to one or a pair of brake shoes. When the springs are released from a compressed state, the brake shoes engage and grip hoisting ropes, part of the hoisting apparatus or the car guide rails, within a predetermined time from the start of a brake application cycle. During a brake application cycle, the springs move the cam follower along cam surfaces shaped and disposed to cause the cam follower to move at least one of the brake shoes toward the other brake shoe. The gear assembly includes clutch means for disengaging from and engaging with a gear or axle of the gear assembly during decompression and compression of the springs, respectively. A resilient material in the braking apparatus initially accelerates movement of the cam follower when the springs begin to decompress, and may protect gears of the gear assembly from damage at the end of a brake release cycle.

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 includes a guide rail and brake equipment for guiding, holding and braking the elevator installation. The brake equipment has a brake lining which co-operates with a brake surface, advantageously with the brake surface of the guide rail, for the purpose of the braking and holding. The brake surface has at least one longitudinal wedge groove or wedge elevation which is oriented in the braking direction and on which the brake lining acts in case of need. An amplification of the braking force is achieved by the longitudinal wedge groove or wedge elevation.

Abstract: An emergency braking assembly that stops the rotation of a shaft in the event that the speed of the shaft exceeds a predetermined speed. The braking assembly includes a flanged mounting ring that is mounted to a housing where the shaft extends through the ring, and a braking ring threadably mounted to the mounting ring. An insert is mounted to the shaft within the braking ring. The braking assembly insert includes a pair of symmetrical weights that tend to move outward upon rotation of the shaft. Pins mounted to the weights and the insert prevent the weights form moving outward until the speed of the shaft exceeds the predetermined speed. A locking mechanism that locks the pin to the insert releases causing the pins to extend outside of the insert and engage stops mounted to an inside surface of the braking ring, which stops the shaft from rotating.

Abstract: A tripping device for engaging an elevator lift cage safety brake has actuating levers arranged at a rotary axle for engaging safety brake wedges of the safety braking device. Each actuating lever has a longitudinal slot matched to the diameter of the rotary axle, wherein the actuating lever is freely movable in the direction of the rotary axle and in the direction of the length of the actuating lever. A torsion spring fixes the actuating lever about the rotary axle. One spring end presses the actuating lever downwardly, wherein the movement of the actuating lever is limited by a lower abutment. The other spring end is detachably connected to a support. An upper abutment limits the movement of the actuating lever upwardly. The lower abutment and the upper abutment are each held at a respective end of a T-shaped shackle, wherein the shackle is fixedly connected to the rotary axle.

Abstract: A vertically sliding freight elevator landing door with a safety brake that deploys when a chain suspending the door breaks. The safety brake is adapted for use on both panels that slide up to open or that slide down to open. The brake, which is simple in construction and installation, comprises, principally, a caliber block fixed to the door and a roller cam assembled in the block. A spring biases the roller cam towards a wedge lock position while a cable normally holds the roller cam in an inactive position. The cable and, therefore, the roller cam are released when the associated door suspension chain breaks. The roller cam, operating between a tilted internal surface in the caliper block and a door guide rail quickly frictionally brakes the door on the guard rail.

Abstract: A fall safety device is provided having a load-bearing rotor 2, which supports at least one locking member 6, which can be moved by centrifugal force and which is moved into engagement with at least one stop 7b of a stator 4 if a certain rotor speed is exceeded and blocks the further rotation of the rotor 2. The locking member 6 and/or the stop 7b is in active connection with a braking body 8, which undergoes a plastic deformation when engaging the fall safety device and damps the stopping process.

Abstract: In an elevator emergency stop device wherein emergency stop of the elevator cage (20) is achieved by generating frictional force at a sliding part (11) and guide rail (1) by pressing a sliding part (11) against guide rail 1 using a wedge-shaped element (3), in wedge-shaped element (3), the dimension in the direction perpendicular with respect to the sliding faces on the guide rail (1) and sliding part (11) is changed in accordance with the braking force. An elevator emergency stop device can thereby be provided wherein the braking force is kept constant even though the coefficient of friction changes.

Abstract: A disc brake to be opened by torque is arranged between a drive shaft and a driven shaft and comprising a brake wheel arrangement arranged between the drive shaft and the driven shaft, a friction surface arrangement arranged to co-operate with the brake wheel arrangement, at least one spring device arranged to press the brake wheel arrangement and the friction surface arrangement axially against each other, and a cam arranged between the drive shaft and the brake wheel arrangement, and the cam causing by the impact of the torque or rotation of the drive shaft and the possible countertorque of the driven shaft the relative axial position between the brake wheel arrangement and the friction surface arrangement to change in order to detach at least partly the braking engagement against the spring force caused by the spring device.

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: An improved slip assembly having a base and at least two opposing slip frames positioned on the base with each of the slip frames including a planar slip surface. Additionally, a die is carrier positioned within each of the slip frames and each of the die carriers also includes a planar surface which engages the slip surfaces of the slip frames. The improved slip assembly also includes a low friction slip assembly having a base and at least two opposing slip frames positioned on the base. Each of the slip frames will include a slip surface having an effective coefficient of friction less than about 0.07 and die carriers will be position within each of the slip frames.

Abstract: A device for preventing uncontrolled acceleration of an elevator car installed in an elevator installation. The device has a limiting cable guided over rollers in a direction of movement of the elevator car. A braking device which is joined to the elevator car is connected to the limiting cable by a release and brakes the elevator car in both a downward and upward direction when the limiting cable transmits a predetermined release force to the release. A speed limiter is connected to one of the rollers and stops the roller when the traveling speed of the elevator car exceeds a predetermined limiting speed either in a downward or upward direction.

Abstract: A braking device acts on a guide rail and consists of a housing that is arranged at an elevator car yoke and serves as a support for spring packets and/or for adjusting packets. The housing also serves as a support and guide for chock guide elements that in turn retain and guide brake chocks with brake linings. Pushrods engage at one end at the brake chocks, and at the other end are pivotably connected to an actuating fork. Upon braking of the elevator car, the actuating fork is moved at the pushrod end in the direction of the braking device. The guided brake chocks with the brake linings slide in the braking device. At the same time the brake linings are moved at the guide leg of the guide rail. The brake chocks are moved in the braking device and the spring and adjusting packets are stressed, whereby a braking force for stopping an elevator car or a counterweight is generated.

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: In a kitchen appliance (1) having firstly a container (3) and having secondly a cover (11) for the container (3) and having thirdly a tool drive means (10) which is accommodated in the container (3) and which is rotatably supported in the container (3) with the aid of bearing means (9, 21) which allow a pivotal movement, which tool drive means is passed through an opening (15) in the cover (11) and is disposed in the opening (15) so as to be clear of the cover (11) in order to allow a pivotal movement of the tool drive means (10), and having fourthly a drive arrangement (28) placed on the cover (11) coupled to the tool drive means (10) so as to be in driving engagement therewith, the tool drive means (10) is, in the fifth place, provided with a brake means (30), whose braking function is disabled when the drive arrangement (28) is coupled to the tool drive means (10) and which in response to a disengagement of the drive arrangement (28) from the tool drive means (10) performs its braking function as a result

Abstract: An emergency stop apparatus for an elevator having a simple structure as well as effectiveness, which may facilitate to reduce manufacturing and maintaining cost.

Abstract: A safety lock device including a clover mechanism mounted on a rotating shaft to be used with an unbalanced free-fall dog that precludes rotation of the rotating shaft upon rapid acceleration or excessive speed of the rotation of the shaft. The free-fall dog is pivotally mounted on a fulcrum upon which the free-fall dog may teeter in an unbalanced seesaw motion. At opposite ends of the fulcrum are a locking finger and an arm. The free-fall dog is unbalanced such that the arm contacts the clover mechanism as it rotates while the locking finger does not contact the clover mechanism at slow rotating speed. At a slow rotative speed, the arm is only slightly deflected. With great acceleration, the arm is deflected farther from the clover mechanism thereby causing the locking finger on the opposite side of the fulcrum to be pivoted into the clover mechanism.

Abstract: A brake for a plunger of a hydraulic elevator is provided which in a preferred embodiment includes a pressure plate, a first brake ring, a wedge plate, a biasing spring and a fluid release actuator. The pressure plate is movable along an axis generally parallel with the axis of the plunger. The first brake ring encircles the plunger and has an inner surface for engagement with the plunger. The first brake ring also has a second surface for force engagement with the pressure plate. The first brake ring additionally has an outer wedge surface. The first wedge plate has a first wedge surface for engagement with the wedge surface of the first brake ring. The spring biases the pressure plate and wedge plate toward one another. The fluid release actuator urges the pressure plate away from the wedge plate. Upon release of the actuator relative movement of the pressure plate towards the first wedge plate causes the brake ring to circumferentially grip the plunger and prevent movement axial of the plunger.

Abstract: A breaking arrangement for elevating work platform includes a break body, a C-shaped receiving piece, a breaking unit, and a break released handle. The breaking arrangement allows only upward movement of the elevating work platform during normal operation, the construction workers can move downward after a break released handle is released. The breaking arrangement can further provided an emergency stop when failure occur in the main suspension cable or the winding machine, so that the elevating work platform would not slide down.

Abstract: A lock device for an output shaft, wherein an output shaft is formed by connection of a driving shaft and a driven shaft, a play angle for not transmitting power for a specified angle in mutual rotating directions is formed in the connection area for connecting the driving shaft and driven shaft, a locking mechanism for locking by moving a lock member arrested on the driven shaft and held movably inward and outward in the radial direction is provided at the driven shaft side, and an unlocking mechanism for unlocking by moving the lock member of the locking mechanism in an unlocking direction within the rotating amount of the play angle is provided in the driving shaft.

Abstract: A safety apparatus for an elevator of the present invention includes an emergency stopping mechanism for generating a high frictional force to brake the elevator, a driving apparatus for operating the emergency stopping mechanism, a cam latch mechanism for releasing the driving apparatus when the speed of movement of the elevator reaches a critical speed, and a governor for activating the cam latch mechanism

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 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 braking device is described for an elevator having a governor that actuates above a tripping speed for braking an elevator car or counterweight that is guided on a vertical guide rail. The braking device includes a unitary safety housing attached to the elevator car or counterweight and at least partially surrounding the guide rail. The safety housing is expandable and has opposite, facing wedge guides on opposite sides of the guide rail. A pair of wedges are included, each being received between the guide rail and one of the wedge guides. An actuator is linked with a governor and the wedges for driving the wedges into the safety housing, forcing the safety housing to expand and produce a clamping force on the guide rail, in response to actuation of the governor.

Abstract: Composition and process for the preparation of high temperature stable continuous glass fibers with an upper temperature use limit of 2300.degree. F. are provided. The compositional formulation, in mole percent, is 62-85% SiO.sub.2, 10-20% Al.sub.2 O.sub.3, 5-15% MgO, 0.5-5% TiO.sub.x, and 0-5% ZrO.sub.2. The continuous fibers are prepared by an economical direct melt method, and demonstrate high tensile strength, high Young's modulus, and low linear thermal shrinkage characteristics. Friction pads containing these high temperature stable continuous glass fibers are also provided.

Abstract: A pair of pawl assemblies is mounted on a shaft. Each pawl assembly includes a pawl, an arm and a hub. The arm is attached to the hub by a pivot, and a spring biases the arm toward the hub. The pawl attaches to the end of the arm, and the surface of the pawl has several teeth pointed in the direction of rotation. A brake drum made of two halves is bolted together around the shaft and pawl assemblies. The inner surface of the drum has teeth designed to mesh with the teeth on the pawls. A brake lining band fits around the brake drum in a groove formed along the circumference of the brake drum. The brake lining band attaches to adjustable mounting hardware, which is secured to a fixed surface. When the rotational speed of the shaft exceeds a safe level, the teeth on the pawls engage the teeth in the brake drum, causing the drum to turn against the brake lining band. The friction of turning the drum slows the shaft to a full stop.

Abstract: Apparatus for braking relative vertical movement between two vertical members includes a ramp mounted on one of the members to oppose a vertical face on the other. If the ramp member accelerates downwardly a wedging roller is wedged between the ramp and the vertical face. This roller is on a slide rod which normally compresses a spring carried at the bottom of the ramp, but downward acceleration on the ramp results in expansion of the spring and movement of the wedging roller into wedging position to stop the acceleration.

Abstract: In this overspeed governor, an overspeed condition causes, by way of coupling elements (15,15'), a brake (5) comprised in the overspeed governor to engage a rope pulley (3) which, due to friction, brakes the rope driving the rope pulley itself and thus triggers the safety gear of the elevator. In the invention, the rotation of at least one coupling element (15,15') provided in the overspeed governor and rotating with it is braked by a frictional force which is applied to a braking point (31,32) on the coupling element (15,15'). The combined effect of the braking action and the rotation of the overspeed governor turns the coupling element (15,15') into a position in which the brake (5) is activated so as to engage the rope pulley (3).

Abstract: A procedure and an apparatus triggers the safety gear of an elevator at a speed lower than the gripping speed. The overspeed governor of the elevator comprises a pulley (3) driven by the safety gear rope and a brake (5) connected to it by knuckle pins (14,14'). The brake is provided with centrifugal weights (16,16'). Eccentric cams (15,15') and a brake disc (6) are also provided for the overspeed governor. At a speed lower than the gripping speed, using a separately controlled solenoid (30) attached to the overspeed governor, the brake (5) is caused to engage the pulley (3) by driving the plunger of the solenoid into the path of rubber rollers (31,32) rotating with the centrifugal weights.

Abstract: An apparatus is mounted on an elevator car for actuating a safety catch or a car brake when an excess car speed is detected in either a downward or an upward direction of travel, or when an unchecked movement of the elevator car takes place. The actuation takes place by movement of a pull rod cage connected to upper or lower pull rods, wherein the pull rod cage transmits a mechanical relative movement which is performed by a mechanical or an electromagnetic car speed monitoring device. Upper and lower sliding connections, which transmit tension forces and actuate the safety catch and the car brake respectively according to whether the car is moving downward or upwardly respectively, serve as connections between the pull rod cage and the upper and lower pull rods respectively.

Abstract: An overspeed governor comprises a pair of wedge brakes for selectively acting against a brake surface attached to the rotational shaft of an elevator drive. A maintaining apparatus is provided to maintain the wedge brakes in a normal position, out of engagement with the brake surface. A centrifugal actuating apparatus is also provided, attached to the rotational shaft of the elevator drive. If the rotational velocity of the elevator drive exceeds a predetermined limit, the centrifugal actuating apparatus displaces the maintaining apparatus, thereby allowing one of the wedge brakes to engage the brake surface.

Abstract: A permanent magnet 54 mounted on rods 41 passes vertically over a conductive plate 56 in an elevator hoistway 36, a reactive force causes movement of the permanent magnet 54 vertically away from the conductive plate 56 so that a wedge 24 secured to the rods 41 moves within a tapered wedge guide 44 until it contacts an elevator guide rail 14 on which an elevator car 2 is riding, thereby braking the elevator car 2.

Abstract: A bidirectional overspeed device is provided for an elevator system having an elevator car for travel within a hoistway along a guiderail. The elevator includes a governor rope running from a governor sheave at the top of the hoistway to a tension sheave at the bottom of the hoistway, and a bidirectional overspeed device. The bidirectional overspeed device comprises a bidirectional governor, a first safety brake, a second safety brake and a bidirectional linkage apparatus. In the event of an overspeed condition in either direction, the bidirectional governor clutches the governor rope, thereby operating the bidirectional linkage apparatus which connects the governor rope to the safety. Depending on the direction of the car travel, the linkage apparatus is either pulled upward or downward. Consequently, either the first or second safety is engaged and the elevator car is stopped.