Abstract: A calibration apparatus for the calibration of patient dose measurement and control systems of the character used in diagnostic radiology. The calibration apparatus includes a novel ion chamber that is of rigid construction. The ion chamber has a radiation input face that incorporates an optical alignment target or reticule having markings generally corresponding to a range of field sizes and shapes. A series of radio-opaque targets are embedded beneath the surface of the optical target to facilitate alignment using a radiation image.

Abstract: The present invention provides a foil bearing (1), comprising: a stationary mount member (2) surrounding an outer circumferential surface of a journal (13) of a rotating member via an annular gap (G); and a plurality of centripetal force producing foils (e.g., middle foils 12) arranged in a circumferential direction in the annular gap, where each of the centripetal force producing foils has one end fixed to the stationary mount member, wherein portions of the stationary mount member located between fixed ends of adjoining ones of the centripetal force producing foils are formed with an axially extending slit (4).

Abstract: A fluid dynamic bearing system having at least one stationary part and one rotating part that form a bearing gap filled with bearing fluid between the opposing bearing surfaces, at least one end of the bearing gap being open and sealed against the environment by a sealing means, pumping grooves being provided on at least two spatially separated bearing surfaces to generate hydrodynamic pressure and at least one supply volume connected to the bearing gap being available for the bearing fluid. The distinctive feature of the invention is that the sealing means are formed by pumping grooves that are disposed at the open and of the bearing gap on at least one of the bearing parts and designed in such away that they generate a pumping action on the bearing fluid directed towards the interior of the bearing and, as a result, create a dynamic seal for the open end of the bearing. The bearing system itself is designed as a compact unit preferably consisting of only three parts.

Abstract: The invention relates to a fluid dynamic air bearing system to rotatably support a motor. The bearing system comprises a stationary shaft, a bearing bush partially enclosing the shaft and connected to the shaft, a bearing plate partially enclosing the shaft and connected to the shaft, the shaft, the bearing bush and the bearing plate between them forming a cavity that is rotationally symmetric with respect to a rotational axis. A component partially enclosing the shaft and having a sleeve-shaped section and at least one disk-shaped section is rotatably accommodated in the cavity, a bearing gap filled with air or a gas separating the surface of the rotatable component from the surfaces facing the rotatable component of the shaft, the bearing bush and the bearing plate.

Abstract: A wheel bearing unit having at least one outer part, at least one inner part and having at least two rows of rolling elements between the outer part and the inner part, on the outer part at least one inner raceway, and on the inner part at least one outer raceway for the rolling elements of a row.

Abstract: A bicycle hub is provided that comprises a hub axle, a hub body, a bearing and a clearance adjusting member. The bearing includes an outer ring coupled to the hub body, an inner ring coupled to the hub axle, and a plurality of rolling components disposed between the outer ring and the inner ring. The clearance adjusting member is disposed with respect to the outer ring of the bearing such that at least a portion of the clearance adjusting member is disposed axially inwardly of the outer ring. The clearance adjusting member is configured and arranged to prevent a grease inside the bearing to leak toward an axially inward direction of the hub axle with a prescribed radial clearance being maintained between the clearance adjusting member and one of the hub axle and the outer ring of the bearing.

Abstract: In an optical connection apparatus for use in optical connection, a shutter is held by a housing defining an optical axis of the optical connection. The shutter is formed by a single sheet of plate material and includes a plate-like light shielding portion positioned to cross the optical axis and a held portion held by the housing. The shielding portion has a width in a direction perpendicular to the optical axis. The held portion is shifted in position with respect to the light shielding portion in the direction of the width of the shielding portion.

Abstract: The inventor found that the lightwave of a semiconductor laser includes, in addition to the laser oscillation lightwave, a weak, continuous noise component having a different wavelength (here, referred to as natural emission lightwave). The inventor also found that in the wavelength division multiplexing communication optical system in which signal lightwaves having a plurality of wavelengths are combined to transmit over a single optical fiber so as to be separated at the other end to receive with a plurality of light-receiving devices, the natural emission lightwave causes crosstalk. A natural emission lightwave-blocking filter that reflects a natural emission lightwave is placed on the optical path between the semiconductor laser and the optical fiber. The natural emission lightwave-blocking filter blocks the natural emission lightwave, preventing the crosstalk.

Abstract: A device for transmitting data between two structural units connected to one another by an articulated joint has a long service life which permits a high transmission rate in conjunction with particularly small dimensions. The first structural unit includes a first optoelectronic component and the second structural unit includes a second optoelectronic component, the first optoelectronic component being connected to the second optoelectronic component via at least one optical fiber. One end of the optical fiber is brought into contact with the first optoelectronic component via a molded interconnect device (MID) plug connection and the other end is brought into contact with the second optoelectronic component via another MID plug connection.

Abstract: A ferrule embodiment includes a ferrule having a number of optical fibers each having an end and an optoelectric power source to convert light traveling through at least one of the optical fibers into electricity to provide power to a component.

Abstract: A light emitting module according to the present invention is characterized in that a light emitting device and a light-emission-side lens are held close to each other by a holding part extended from part of a stem in parallel with outgoing light of the light emitting device, and light emitted from the light emitting device is refracted. A single-fiber two-way optical communication module according to the present invention has the light emitting module and, in addition, collimate lenses close to an optical fiber and a light receiving device, and is characterized in that splitting of light to a light receiving module or coupling of light from the light emitting module is performed with parallel rays. Each of the collimate lenses condenses the parallel rays to an incident/outgoing end face of the optical fiber, condenses the parallel rays to a light receiving face of the light receiving device, and outputs, as parallel rays, outgoing light from the light emitting module.

Abstract: An image-taking apparatus is disclosed which has a mirror drive mechanism with a small number of constituent parts, easy assembly. The image-taking apparatus has a mirror movable to a first position in an optical path and to a second position outside the optical path, a first biasing member biasing the mirror from the second position to the first position, a second biasing member biasing the mirror from the first position to the second position, a holding member holding the first biasing member in a charged state, a first cam having a charge portion for charging the second biasing member and a release portion for releasing the charge of the second biasing member, a second cam releasing the holding by the holding member, and a motor driving both of the first and second cams only in one direction.

Abstract: A concealed camera comprising a housing, a subminiature camera and a peep hole of very small size through which the camera may perceive a large field of vision. With a high resolution camera and the tiny peep hole, the camera may be positioned or located in plain view as concealed within a myriad of functional objects, such as a clock, reflector, light or any other common looking device in the area of desired view or surveillance. Multiple concealed cameras may by employed and perhaps synchronized in a surveillance system such that the downstream viewed image may be automatically switched from one image to another as desired by the system user.

Abstract: An armature damper according to the present invention acts to abut against the arm of an armature to stop the arm at a predetermined backward position. The armature damper is formed in a manner that the surface thereof abutting against the arm is formed by a rigid body member and an elastic member is integrally joined to the rear surface of the rigid body member, and the elastic member is formed to protrude from the outer side of the rigid body member at least at the engaging portion between a positioning armature stopper and the armature damper. The protruded portion is used as a buffer at the engaging portion between the armature stopper and the armature damper.

Abstract: A printing apparatus includes a base coupled to a copying device and a printing device. A feed mechanism is provided which is operable to couple to the base in one of either a first position or a second position, whereby the feed mechanism is operable to feed a document to the copying device in the first position and the feed mechanism is operable to manipulate a printing medium to allow the printing device to print to a plurality of sides of the printing medium in the second position.

Abstract: A sheet cutting apparatus including: a cutting blade for cutting a sheet to be cut, which includes a sheet or a sheet stack; and a transport devices capable of holding and rotating the sheet to be cut to cause an end portion of the sheet to be cut to be opposed to the cutting blade and transporting the sheet to be cut to a position where the end portion is cut by the cutting blade.

Abstract: When the trailing edge of a recording sheet is released from a nip of a first pair of rollers which hold and convey the recording sheet, on the upstream side in the conveyance path, a variance of electric power for driving the first pair of rollers is detected, and image data to be outputted to the print head is shifted to the upstream side in the conveyance direction of the recording sheet, so that the print head is driven. As a result, it is possible to prevent the positional shift of image due to the conveyance error of the recording sheet caused when the recording sheet is released from the nip.

Abstract: A paper tray for a printer includes a paper support plate for supporting paper sheets stacked thereon and a support frame formed on the printer body adjacent the paper inlet. The paper support plate has a C-shaped hook having a base portion and upper and lower arms. The support frame has a protruding shaft and an upwardly inclined housing wall. The paper support plate is detachably hinged to the support frame with the C-shaped hook engaged with the protruding shaft so as to be rotated between a vertical position and a horizontal position. The housing wall extends forward beyond the protruding shaft and has a horizontal surface serving as a contact surface at the top of the extending portion. The C-shaped hook has a rib at the base portion. When the paper support plate is rotated to the horizontal position, the rotation is limited by the under surface of the rib coming in contact with the top surface of the extending portion.

Abstract: A pen which includes a marking device, the pen being operative to mark a visible path onto a surface. The marking device is electronically controllable to change an attribute of the path, such as line width or color. The marking device is actuated in response to a compression force sensed by a switch.

Abstract: A releasable fastener for an album to permit insertion and removal of pages between the covers. The fastener has a pair of strap anchors each attached to one of the two covers and a strap passing between the anchors via aligned apertures in the covers and album pages. Each strap anchor is in the form of a channel in which the strap is a snap fit so that the strap is releasably locked into the channel and is restrained from longitudinal displacement by inter-engaging formations on the base of the channel and the opposing surface of the strap.

Abstract: A connecting construction for components of a system frame, having frameworks which have frame struts (12) and cross brackets (14) connecting the frame struts (12), a sheet steel corner plate (20) which is arranged in each case in the region in which the cross bracket (14) is connected to the frame strut (12) and which has a corner recess (22) in the corner region of the region in which the cross bracket (14) is connected to the frame strut (12), by means of which a coupling unit can be connected to the frame strut (12), is distinguished in that a further recess (24) is provided approximately level with the corner recess (22) and offset inward, and a further coupling unit having a first coupling element and a second coupling element is provided, it being possible for a frame tube to be connected to the first coupling element, and the second coupling element being designed in such a manner that it can be fastened in the further recess (24) of the sheet steel corner plate (20) with a positive and/or non-positiv

Abstract: A connecting member for releasably connecting a first part to a second part is provided. The connecting member includes a housing and a first locking member. The housing has a first opening and a second opening. The first locking member has a first tab and a first button. The first locking member is in the housing such that the first locking member biases the first tab through the first opening and the first button through the second opening. The first tab is releasably connectable to the first part over the housing when the first tab is biased through the first opening. Further, the first button remains uncovered by the first part when the first part is releasably connected to the first tab.

Abstract: A combinational commodity engaging unit which can connect by engaging plates of a computer desk, a TV cabinet etc. in order to assemble the combinational commodity without using an auxiliary tool, the engaging unit includes at least: a fixing seat embedded in a first plate, a hollow engaging member embedded in a second plate and having its bottom portion engaged in the fixing seat, and a fixing rod extended into the interior of the hollow engaging member to maintain the hollow engaging member in a state of engaging the fixing seat. By combination of the above stated fixing seat, hollow engaging member and fixing rod, the combinational commodity can be assembled without using an auxiliary tool.

Abstract: The present invention concerns a device for fastening an emitter to a housing comprising a first, manoeuvre element (10) being slidable in a first direction (11, B), a second, activating element (20) being slidable in a second, fastening direction (21) being inclined in relation to said first direction (11, B), whereby the first and second elements (10, 20) are interconnected via at least one cam mechanism (50). Moreover, the device further comprises a third, fastening element (30) being slidable in the second direction (21), whereby the second and third elements (20, 30) are interconnected via at least one fourth, elastic element (40), whereby the third element (30) is adapted to move, in response to displacement of the first element (10) in said first direction (11, B), between a fastening position in which it produces a fastening force onto said emitter (1) and an open position in which the fastening force is released.

Abstract: A lock pin with pushbutton-operated axial locking has two locking elements which point in opposite directions and are mounted in radially outwards directed recesses in the body. To ensure a good, wear-resistant pivotal mounting of the two locking elements, combined with good locking action and resistance to shearing, the invention provides that the locking elements create a virtual, freely guided pivoting axis in their connection zone. The result is a pinless mounting of the locking elements.

Abstract: A quick connect coupling assembly for mounting an accessory tube to a mounting base having a stem connecting a ball to the base. The assembly includes a cylindrically shaped main body having a cavity formed therein for receiving the ball. A coupling sleeve has an orifice and a profiled cutout formed in the circumference of the sleeve. A spring is disposed on the main body and abutting the sleeve. A guiding mechanism is fixed to the main body and interacts with the orifice for compressing the spring and mounting the sleeve on the main body. The guiding mechanism aligns the cutout with the cavity when the sleeve and the main body are positioned in a receiving position for receiving the ball.

Abstract: A quick connect anchor 20 for attachment to a cooperating fastener 110, the anchor including: a plate 30 configured to be placed over the fastener and configured to be moved in a first direction from a free position to a locked position; and a resilient blocking member 50 movable with the plate from a first position, in which the resilient member is free from the fastener, to an engaged position in engagement with a portion of the fastener, to resiliently connect the plate with the fastener when the plate is in its locked position.

Abstract: A trench drain frame, and associated grate, adapted to be mounted atop a commonly available drain pipe, for casting-in-concrete in poured concrete or packed asphalt, or otherwise embedding in a suitably tightly packed supporting material, the frame having a pair of connected side walls, each side wall having a lower base portion with downwardly extending support wall to position and support the trench drain frame over the associated underlying pipe. Once the assembled frame, grate and pipe are cast in concrete, or otherwise supported, the grate is removed, and at least portions of the top of the pipe are removed to expose the interior of the pipe for drainage purposes, and the grate is secured to the trench drain frame. A separable end plate can be used to close off a cut-open end of the trench drain frame, when the later is cut short for a given application.

Abstract: Improved reflective pavement marker is disclosed having a unitary hollow structural body molded in situ about at least one pre-formed retro-reflective lens plate. The unitary structural body has a base surface partially sealed with a compatible sheet includes exterior surface with multiple protruded grooves. An alternative structural body can have a sealed base surface including multiple protruded and recessed grooves with at least one inclined face having a recessed area for receiving a pre-formed lens plate attachment. The planar base surface of said unitary structural body includes an impact absorbing hollow cavities extending along the sides of the inclined reflective faces and incorporate multiple of protruded rectangular grooves.

Abstract: A portable overlapping secured mat system with uniformly sized plastic mats joined together to form structural support surface for use by persons or equipment. The mats' edges have recessed upper and lower lips with finger projections extending from the upper lips sized to fit into holes of adjacent mats' lower lips securing the mats together when the front edge of the finger projections are moved into a recesses of the back wall of the hole.

Abstract: A system for working a paved surface is disclosed in one aspect of the invention as including a water deposition device for increasing the moisture content of a paved surface; a microwave generator for applying microwaves to the moisture content to heat and thereby soften the paved surface; and a degradation element for working the paved surface. In certain embodiments, the apparatus may also include a surface preparation device to fracture, puncture, mar, scrape, or scarify the paved surface prior to increasing the moisture content, and a containment device to substantially restrict the escape of water as it is deposited onto the paved surface.

Abstract: A work machine for removing asphalt from a roadway is disclosed. The work machine includes a removal device configured to remove asphalt from a roadway surface, and a grinding device configured to fracture the removed asphalt. The work machine also includes a funnel-shaped ramp configured to guide the removed asphalt from the removal device to the grinding device. A width of the removal device is larger than a width of the grinding device, and the funnel-shaped ramp is configured to fold the outer edges of the removed asphalt over itself before the removed asphalt reaches the grinding device.

Abstract: A walkway extension assembly for a paving machine has main and laterally extendable and retractable screeds and a transversely extending rear catwalk or walkway. The assembly has a laterally extending walkway component extending beneath and on each side of the existing walkway. Channel members are attached to and extend downwardly from bottom surfaces of the existing walkway. The lateral walkway components are positioned beneath the existing walkway on these channel members, and are slideably extendable, laterally and outward from the existing walkway. Brackets are attached between the ends of the walkway components and the sidewalls of the lateral screeds. By this configuration, when the lateral screeds are extended from beneath the paving machine, the lateral walkway components, moving in tandem with the screeds, are also extended. Workers are thus able to stand on the walkway components, outboard of the paving machine itself, to observe the lateral paving operations.

Abstract: A boat lifting assembly includes a cradle for carrying a boat mounted between three pilings on each cradle side. A pair of support housings is affixed to the pilings on each cradle side. A pair of hydraulic lifts are housed in the housings and connected to the cradle for moving same vertically. Each lift includes a horizontally extensible piston carrying a piston pulley block and a stationary hydraulic cylinder. Three cables have one end portion threaded between the pulleys of the block and the cradle. Transition pulleys are supported by the housing and direct the cable vertically for moving the cradle when the block is moved. Additional pulleys and various anchor points may be employed to provide for vertical lifts of 1.5, 2.0 and 3.0 times the distance of movement of the piston. The housings are in the same plane as the cradle deck and/or dock.

Abstract: A boat support stands. A pair of aligned and mutually opposed beds is pivotally mounted by risers atop a base plate. A cable and spring urge the beds to move together.

Abstract: A system and method for conditioning turf at of one or more golf course areas includes an aeration subsystem having subsurface aeration conduits for aerating the area, and an air blower unit in fluid communication with the aeration conduits configured to provide one of a vacuum in a vacuum mode and air under pressure in a pressure mode in the conduits. A control module is provided which responds to a directive for controlling operation of the aeration subsystem in response to sensing environmental parameters. The control module operates the blower in repetitive cycles of intermittent operation in one of the vacuum mode and pressure mode wherein each cycles includes a blower-on and blower-off mode. The blower-on mode operates the blower units for a first time interval and the blower-off mode ceases operation of the blower units for a second time interval during each cycle.

Abstract: A system to improve water distribution within a septic system drain field and in turn maximizing the efficiency of the water drainage while reducing maintenance and repair costs through the employment of a plurality of substantially parallel leeching lines in communication with a septic tank that feeds effluence thereto through a first header pipe and having a second header pipe on the opposing ends to maintain the functionality of the leeching line in the event of a clog.

Abstract: An adjustable coupler is disclosed for interconnecting leaching chambers to create a serpentine pathway for a leaching field. A coupler can connect a first leaching chamber and a second leaching chamber. The coupler can comprise a mating feature and an adjustment feature. The mating feature can be used to mate the coupler between the first leaching chamber and the second leaching chamber. The mating feature can include a swivel connector matable to an end of one of the chambers. The adjustment feature can adjust the angle between the first chamber and the second chamber between a range of angles. The adjustment feature can include a swivel connector. The range of angles can be particularly chosen to be about 45°. More particularly, the range of angles can be about 22.5° in either the clockwise or counter-clockwise direction.

Abstract: The present invention describes a process utilized for the remediation of soils and petroleum drilling wastes contaminated with hydrocarbons, which consists in stabilization by application and mixing in specific proportions of calcium oxides and organic conditioners. It is possible to treat materials with concentrations of at least seven percent (dry weight) of hydrocarbons petroleum hydrocarbons (TPH) and reduce the concentration to 1-1.5% TPH. Furthermore, residual toxicity is completely eliminated in the treated material, vegetative growth is stimulated, the treated material does not present significant concentrations of hydrocarbons leachates and it passes all criteria to be considered not a dangerous waste (CRETI or TCLP).

Abstract: A deep draft semi submersible structure wherein the semi-submersible has a center of gravity below its center of buoyancy and the structure is a floating vessel with at least three vertically oriented buoyant columns. Each of the vertically oriented buoyant columns have at least one ballasted compartment and the columns are spaced apart at a sufficient distance to reduce vortex induced vibration amplitude. There are at least two connecting structural sealed trusses connected to the columns below sea level, they are positioned to minimize hydrodynamic wave action on the trusses and to transfer shear loads between the columns while remaining transparent to wave and ocean current motion.

Abstract: In this invention, after a hole has been drilled or excavated, injection probe(s) are placed at appropriate depth(s), the excavated native materials are replaced with appropriately sized crushed rock or other natural or synthetic materials, and then a polymeric resin is injected through the probe(s) to encapsulate and bind the fill material, whereby upon curing the polymeric resin and fill material forms a foam friction pile. Such friction piles drilled or excavated adjacent to each other will form a foam sheet piling system. The foam piles can also be re-enforced using nylon, polypropylene, fiberglass, other synthetic or non-synthetic materials or combinations of these materials. The polymeric resin typically would comprise a high density closed cell, water resistant expanding two component polyurethane foam system.

Abstract: A continuous connecting profile (10) for attachment of sheet piles to supporting elements has a central rib bar (16) that separates from each other two oppositely-placed attachment profiles, each having a jaw, and is a part of both attachment profiles. One of the attachment profiles is configured as a mounting profile for the supporting element, and the other attachment profile is configured as a receiving profile for a lock of an attaching sheet pile.

Abstract: A pneumatic distributor of granular and/or powdery materials includes a main distribution duct having a first end in the region of which an air-flow is injected into the duct under pressure, and a second end. The main duct includes respective adjacent converging-diverging portions, with reference to the direction of the air-flow, defining a Venturi duct. A dosing device is provided for delivering a metered quantity of material into the main duct in the region of the narrow cross-section of the Venturi duct, for the mixing of the material into the air-flow and the entrainment of the mixture obtained towards the second end. The distributor includes at least one auxiliary duct, bypassing the Venturi duct, in order to connect a section of the main duct disposed upstream of the Venturi duct to a section of the main duct disposed downstream of the Venturi duct.

Abstract: The invention relates to a method and an apparatus for pneumatically conveying bulk material which does not flow readily, in which: bulk material is metered by means of one or more input device(s) (8) into a lateral conveyor (1); and the bulk material in the lateral conveyor is subsequently emptied via a transport line (19) wherein the metering of the bulk material into the lateral conveyor (1) is achieved by means of the input device(s) (8) and the emptying of the lateral conveyor (1) is effected with simultaneous action of a mechanical conveyor (9) in the lateral conveyor and inflowing compressed gas (17), with the mechanical conveyor (9) having a narrow clearance with respect to the lateral conveyor (1), so that the lateral conveyor is substantially emptied during the emptying process.

Abstract: Systems for positioning a work piece relative to a tool. These systems may include, among others, apparatus and methods, such as a worktable for a drill press or similar machine, for positioning a work piece, such as wood, plastic, metal, and/or other material, relative to a tool, such as a cutting, shaping, and/or finishing tool. The worktable may be configured, among others, to position a work piece in two planes relative to the axis of the tool.

Abstract: A cargo anchoring system includes anchor rings with an opening formed therein. Each ring has a tongue monolithically formed with an outer perimeter thereof and extending outwardly therefrom. Each tongue has planar top and bottom surfaces respectively oriented perpendicular to a central axis of a corresponding one of the ring openings. Each tongue has an aperture formed therein. Each of a plurality of bars has a groove formed in an outer surface thereof and penetrates through corresponding ones of the apertures of the tongues. A plurality of cotter pins engages corresponding ones of the grooves and prevents the bars from separating from the tongues. A plurality of rails is connected to the rings and the existing vehicle. An anchor plate, including a hitch ball, is coupled to inner surfaces of the rails and centrally positioned therebetween.

Abstract: A cotter pin includes first and second tines having flat confronting surfaces and curved side surfaces with flat outer surfaces substantially parallel to the flat confronting surfaces thereof.

Abstract: A two-piece fastener assembly for securing thermoplastic roof membranes to an underlying roof deck having: a stress plate and a fastener. The stress plate consists of a pre-fabricated metal layer and a thermoplastic layer which are integral with each other. The stress plate has top having three flat surfaces and two circumferential portions, forming ridges or protuberances connecting the flat surfaces.

Abstract: A method for unloading a drilling rig substructure at a drilling site entails transporting the substructure to the drilling site using a truck and a dolly. The substructure is lowered onto the dolly rollers. The dolly is secured and the truck moves towards the dolly pushing the substructure along the rollers. The gooseneck is disconnected from the substructure and connected to the dolly. A first wireline is connected from a first winch to the substructure and a second wireline is connected from the second winch to the substructure through the sheave block. The second winch pulls the substructure along the rollers and is disconnected once the substructure contacts the site. The dolly is unsecured and the truck moves in an opposite direction from the rig, thereby allowing the substructure to move along rollers onto the site. A method for loading a drilling rig substructure onto a truck and a dolly is also described herein.

Abstract: A telescoping bridge crane system arranged to be mounted over a floor of a structure, e.g., a vehicle trailer, and including a pair of enclosed mounting tracks for slidably supporting a runway frame. Trucks are located within the tracks. Each truck includes a hanger. The runway frame also includes two enclosed tracks which are directly supported by the hangers and located beside and parallel to the mounting tracks. A bridge section is mounted between the enclosed tracks of the runway frame by another pair of trucks. The a bridge section supports an extremely low headroom hoist assembly including an actuator, a cable, plural rotatable sheaves and a hook.