Abstract: A new and distinct variety of rose plant of the tea class distinguished by its large, double red flowers which are borne on rigid and very long stems, the flowers when fully blown having a current red coloration on the inner surfaces of the petals and a crimson purple coloration on the outer surface of the petals. The flowers are long lasting as cut flowers and the petals drop off cleanly.

Abstract: A new and distinct variety of rose plant of the hybrid tea class particularly distinguished by its bright red double flowers of medium size having a vermilion red color on the inside and a turkish red color on the outside, borne on stems of average size from a plant having a vigorous growth habit with a particularly great aptitude for forcing and an excellent winter aptitude. The flowers of this plant are long lasting when cut and the petals drop off cleanly.

Abstract: A new and distinct variety of floribunda rose plant distinguished by its light pink double flowers of medium size which are borne on rigid and strong stems; the plant is well branched and produces from one to four flowers per stem; the flowers are beautifully shaped and are generally of a Venetian Pink color flushed with Neyron Pink; the flowers are long lasting as cut flowers, the petals of which drop off cleanly; and the multiflower florescence of this plant gives it a particular aptitude for forcing for the production of cut flowers.

Abstract: The invention provides a highly focussed ultrasonic wave throughout a large depth of field without any mechanical motion. One embodiment of the invention providing two focussed fields includes a front to back arrangement of a converging lens, a transducer without any backing material to dissipate ultrasound, a converging lens, and a transducer. To focus in the far field, the front transducer transmits and receives via the front lens. To focus in the near field, the rear transducer transmits and receives via both lenses which collectively focus in the near field.

Abstract: Ordinarily uncovered vehicles on which the driver is at least substantially exposed and unenclosed, such as motorcycles and their likes and equivalents, are provided with a safety-release back rest rig that is comprised of and contains a vest-like garment for the driver to wear, which body-retaining garment is strapped ahead of the driver in sling-like fashion to the vehicle structure so as to provide secure and comfortable, lean-back support for the drive during running of the vehicle while at the same time being automatically disengageable from the vehicle structure when the driver dismounts and/or has at least a portion of his or her weight removed or uplifted from and/or off the seat for mounting the driver on the vehicle.

Abstract: An atomizer wheel comprising an annular chamber provided with a number of conical outlet holes lined with bushings extending a distance into the chamber.

Abstract: A molded collapsible solution container, which is made from a tubular, plastic parison, defines a body portion having an integral neck portion and shoulder portion at one end thereof. The container is sealed at its opposite end. The body portion defines, in as-molded configuration, a generally oval cross-section taken perpendicular to the axis of the container, adjacent the neck and shoulder portion. The cross-section tapers progressively to a flat configuration at the end of the container opposite to the neck and shoulder portion, which facilitates a uniform manner of flat collapsing of the container progressively from the opposite end toward the end adjacent the neck and shoulder portion as the contents thereof are withdrawn through the neck portion, when the container is disposed in neck downward position.

Abstract: A garment having a front, back, sides, top and an open bottom. The top has closed shoulders thereon and an opening therebetween for receiving a person's head. A pair of straps extend over each shoulder, one end of each strap being permanently affixed to the back of the coat. Fasteners are attached to the other end of each of the straps. A pair of first fastener receiving structures are attached to a lower portion of the back for receiving each respective one of the fasteners and thereby holding the coat in a folded position when the fasteners are attached to the pair of first fastener receiving structures. A pair of second fastener receiving structures are attached to a top portion of the front of the coat, one just below each shoulder, for receiving respectives ones of the fasteners when the coat is being worn, whereby the straps can be stored unobtrusively while the coat is being worn.

Abstract: A combination cargo pack in the form of a soft side carry pack has straps for independent shoulder supported usage and incorporates an article of wearing apparel adapted for storage within the pack. The cargo pack is provided with a plurality of load carrying compartments including a garment pouch defined between an interior partition within the pack and a releasably securable front panel of the pack. The front panel provides a flap closure for removably storing the garment, which also cushions the load. The back of the garment is attached in registered relationship with the interior partition such that, when the garment is worn, the cargo pack and shoulder straps will be functionally operative for supporting the load. The flap closure is further designed for retention, when the garment is worn, in a rolled position by a tie-down strap and cooperating buckle arrangement.

Abstract: An integral prosthetic acetabular cup assembly and a method for making the same including an inner liner contacting an outer backing and a plurality of spacers mechanically entrapped between the inner liner and the outer backing. The spacers may be made of a material different from that of the inner liner and of the outer backing.

Abstract: A corneal implant and method of making the same utilizes a corneal plug removed from an eye, frozen solid, and centrally bored to, but not through, its Bowman's or its Descemet's membrane. An artificial plug which is optically clear is inserted in the bore of the corneal plug and attached thereto. The corneal plug with the artificial plug therein is thereafter implanted in a corresponding opening in the cornea of the patient's eye providing a transparent window free of fluid leakage.

Abstract: An automatic computer controlled bathroom includes a shower, bathtub, sink and toilet which can all be electronically controlled. The sink and shower include water temperature sensors and valves which direct the water to the drain if it is outside of a predetermined temperature range. The temperature sensor also functions to adjust the hot and cold water supplies to bring the water to a desired temperature. A timer can be set to automatically close the bathtub drain and open the water supply at a predetermined time in the morning. Temperature sensors in the tub control the incoming water supplies to bring the bathtub water to a preselected temperature. A water level sensor stops the incoming water when the tub is filled. A similar level sensor prevents the toilet from overflowing by closing the water inlet in the event the water in the toilet reaches a dangerous level.

Abstract: A method of disinfecting the circulating system of a whirlpool bath tub installation comprising blanking off or capping a nozzle or nozzles of the bath tub in such manner that a circulating pump and the nozzle(s) together with associated pipework form a closed path. A small supply of disinfecting solution is connected through a valve to the closed path around which the disinfectant solution is circulated by the pump during a disinfection period in order to disinfect the pump, nozzle(s) and associated pipework. A whirlpool bath tub which incorporates a nozzle or nozzles which can be blanked off or capped, thereby providing a closed path and allowing disinfection thereof, by the foregoing method. A whirlpool bath tub installation comprises a tub, nozzles which can be capped, and a disinfectant supply tank.

Abstract: A hydropneumatic massage bath includes a bath tub having high side walls and a bottom and at least one pressurized-water line that terminates in a water jet nozzle. An air supply line opens into a chamber surrounding the water jet nozzle. Such chamber has an outlet orifice for a jet of water and pressurized air entering the interior of the bath tub structure is provided for pulsating the jet of water/air mixture that discharges into the interior of the bath tub. To achieve a pleasant and variable massaging effect, as well as to reduce the susceptibility of the system to contaminants and compressive stress, an interrupt mechanism is arranged in the air supply line upstream of the chamber to fully or partially close the air supply at a desired pulsation frequency, thereby controlling the flow of incoming air into the chamber.

Abstract: An assist handle to be attached to the direction handle of a shower, or hot or cold water handle to be used to assist people out of a tub. The apparatus includes a slip resistant and resilient grommet at rear of rear plate; rear plate with opening for bolt to secure rear plate to direction handle and four openings to receive bolts to secure front plate to rear plate; handle trough to receive handle; front plate to be secured to rear plate by use of four bolts.

Abstract: An improved seat-bed assembly which includes seat and back supports associated with a linkage and a motor to convert the assembly from seat form to a bed. The seat support may be raised when in the seat position to allow articles to be stored beneath the seat support.

Abstract: A solid compressible foam body is enclosed within a cover of flexible material. A plurality of recessed areas are formed along the surface of the cushion by compressing the foam body in each area and applying closed stitch patterns defining a circular section. The stitches in each pattern pass through the foam body and the cover material situated adjacent opposite surfaces thereof. The stitches maintain the foam body within the stitched areas in a permanently compressed state. The recessed areas are uniformly spaced to create a simulated button tufting effect.

Abstract: A laundry machine having an agitator shaft rotatable backwards and forwards by an electronically controlled electric motor when in a washing mode and continuously in one direction when in a spinning mode has the agitator shaft connected to an interconnecting member spaced radially from its axis engageable with a connector for a concentric spin tub shaft to carry the spin tub with it when in the spin mode. The connection between the agitator rotating system and the spin tub rotating system are effected through an energy absorbing device which absorbs energy resulting from the change in relative speeds necessary to achieve speed equalization between the two systems.

Abstract: A shoe or sandal is chosen which fits the patient's foot. One or more blanks of thermosoftening expanded plastics (e.g. an expanded cross-linked polyethylene) for constituting the insole are heated above the softening temperature and inserted in the shoe. The shoe is fitted on the patient's foot and the patient is walked until the insole is below the softening temperature. The insole may remain in the shoe or may be transferred to the patient's own footwear.

Abstract: A top drying nozzle device for a vehicle washing apparatus has a link mechanism for supporting a top nozzle. The link mechanism has a pantagraph mechanism and two parallel link mechanisms so that the top nozzle can be moved vertically in a forward position of two side nozzles.

Abstract: A hose end holder for an appliance, such as a vacuum cleaner. The hose is corrugated. The end of the hose proximal to the housing of the vacuum cleaner is supported on a nipple attached on the vacuum cleaner. A first tube is placed over the proximal end of the hose and on the nipple to secure the proximal end of the hose in place. The periphery of a second tube is held on the periphery of the first tube. The distal end of the hose is held in the second tube. The two tubes are preferably parallel. The hose is a tight fit on the nipple. The hose is further secured on the nipple by the first tube tightly fitting on the outside of the proximal end portion of the hose extending over the nipple. The first tube has a detent therein extending as a secant adjacent the inner circumference thereof and nesting between a pair of corrugations of the hose.

Abstract: According to the invention, a hose attachment port is provided in the hood of an upright suction cleaner. A hinged door is spring biased sealingly against the underside of the hood to seal the port for on-the-floor operation. The door is pivotable upon the insertion of a converter to a second position, which blocks air communication between a chamber housing a rotary agitator and an air passageway penetrated by the converter. With the door in the second position, suction generated by the cleaner is entirely realized in a hose attached to the converter. Latch means are also provided to releasably secure the converter with the hood.

Abstract: An apparatus for severing portions of the wings of a poultry carcass includes an elongated conveyor having a plurality of spaced carcass supports thereon for sequentially moving a poultry carcass through first and second cut-off stations. Spaced guide rails or bars extend along an upper run of the conveyor to engage the wings and guide them through the stations. The first cut-off station includes rotating knives which sever the wing tips. The second station includes a pair of pivotally mounted or swinging blades which sever the intermediate portions of the wings from the wing stubs. A wing positioning and holding assembly positions and holds the wing in position for cutting at the second station. A cam assembly moves at least a portion of the wing positioner from an operative position to an inoperative position to permit the carcass to move out of the second station.

Abstract: In the making of sausages wherein a continuous web of plastic sheet is supplied and formed into a tubular wrapper about a filling tube, the wrapper is filled with sausage meat, and the filled tubular wrapper is intermittently closed to form sausages, the improvement which comprises controlling the filling and closing steps in dependence upon the amount of unfilled formed tubular wrapper waiting to be filled. An apparatus therefor is provided, including a stop displaceable longitudinally along the filling tube against a spring, the stop actuating certain switches as it moves back and forth along the filling tube, the switches controlling the supply of plastic sheet, filling supply and closing of the sausages.

Abstract: Horizontal conjointly moving endless belts have adjacent stretches disposed in parallel vertical planes to transport a beheaded fish clamped between them successively past a rotating circular belly slitter disc, an eviscerating gutter, a rotating kidney-slitting blooder disc, spray nozzles for scouring the eviscerated fish cavity, a rotating slimer brush which removes the kidney and a fish cavity washing assembly. A slitter guard protrudes into the fish cavity ahead of the slitter disc for holding the skin on the underside of the fish in the path of the slitter disc. Such slitter guard is rounded so that the tail end of the belly cavity rides up on the guard to prevent the slitter disc from cutting the bottom portion of the fish beyond its vent. The gutter engages the beheaded fish between its backbone and the majority of the viscera to scoop the viscera out of the cavity as the fish is moved over the gutter by the belts.

Abstract: Disclosed is an improved roller gin having means for cleaning debris from the knife, and a process of operating such gin. Specifically, the gin includes means to rotate the roll in reverse, periodically, if desired, whereby any cotton, leaf, or other trash draped over the knife is thrown off or discharged from the gin. Means also is disclosed to operate the gin and its feeder in a fashion to gin all cotton enroute from the feeder to the gin prior to the gin going through its cleaning operation.

Abstract: The invention pertains to a conduit clamp utilizing a band circumferentially contractable by a screw substantially parallel to the axis of the conduit being clamped. The clamp components are formed of castings and heavy duty construction techniques whereby high circumferential forces can be produced without damage to the clamp.

Abstract: A retainer for sheet material is provided which is formed of resilient memory type material and which has two oppositely acting and opposed legs which provide a gripping action therebetween. Provision is made for one of the legs to act as an indicia carrying surface and a back surface of the retainer can be adapted to be adhesively mounted on a flat surface.

Abstract: A safety belt buckle comprises a tang, a base having an engaging portion in the form of a cut-away in the wall portion thereof and meshing with the tang by the engaging portion, a lever member pivotably provided on the base and capable of assuming a latched position in which the tang is unseparably engaged with the engaging portion during the mesh engagement between the tang and the engaging portion and a non-latched position which permits the tang to be disengaged from the engaging portion, holding means for holding the lever member in the direction of the latched position when the lever member is in the latched position, operating means for releasing the holding of the lever member in the latched position by the holding means and bringing the lever member from the latched position to the non-latched position, and push-out means for sensing the movement of the lever member from the latched position to the non-latched position and pushing the tang out of the engaging portion.

Abstract: Corduroy cutting machine, including a shaft, a plurality of circular knives disposed adjacent each other on the shaft for cutting open floating wefts of a fabric web being movable along a given travel direction, a plurality of needles being normally movable in a given working area, the needles having points and having longitudinal slots formed therein for receiving portions of the knives at a cutting edge, the needles being insertable into the floating wefts to be cut open in a direction opposite the given travel direction, upper and lower contact strips being respectively disposed above and below the needle points, at least one of the contact strips being actuatable for stopping the cutting machine upon contact by one of the needles, the needles and the lower contact strip defining a working plane onto which the fabric is guidable from below over the lower contact strip to the cutting edge, the lower contact strip being lowerable from the working plane, and a collecting rail being associated with the upper c

Abstract: An air jet nozzle is disclosed which is adapted for imparting entanglements to continuous filament synthetic yarns. The nozzle includes a body member having a yarn passageway therethrough, and a transverse air inlet channel which communicates with the yarn passageway. A yarn threading slot is provided along the length of the yarn passageway for permitting a running yarn to be introduced laterally into the passageway, and a closure plate is mounted so as to be disposed in and substantially close the slot at the periphery of the yarn passageway. The closure plate serves to avoid any disruption of the air currents and thus the entangling process which may otherwise be caused by the presence of the yarn threading slot.

Abstract: A tool changer for an EDM apparatus provided with a reciprocable machining head having a tool holder mounted on the end of the machining head. The tool changer comprises a rotatable indexable turret supporting a plurality of electrode tools each integrally provided with a support member for attachment of the electrode tool/support member assembly to the turret. Successive machining operations are effected by the machining head carrying an appropriate electrode tool, and at the end of each machining operation the electrode tool/support member assembly is attached to the turret.

Abstract: The inlet and/or outlet edge of a blank which is to be converted into the vane of an impeller for use in a centrifugal pump is reinforced by providing an exposed surface of the blank with a pair of contiguous recesses which extend along the edge and the deeper of which is immediately adjacent to the edge. The recesses are then filled with metallic armoring material by cladding so that some of the surplus extends beyond the recesses and/or beyond the edge. In the next step, the surplus of armoring material is removed by one or more material removing tools, together with a portion of the blank in the region of the edge so that the exposed surface is provided with a fresh edge which is defined by the armoring material.

Abstract: A method for the continuous production of exhaust pipes for automotive vehicles comprises the steps of continuously withdrawing an elongated substantially flat metal strip from a coil and subsequently bending and forming the moving strip into a longitudinally slitted tube strand. The opposite faces of the slitted pipe strand are then welded together and subsequently the pipe strand, while still moving, is severed into pipe sections of predetermined length and the pipe sections are then transferred to at least one bending apparatus for bending the pipe sections into exhaust pipes with predetermined bends; and an apparatus for carrying out the above method.

Abstract: A hand-held tool for displacing a valve assembly from a cylinder or pump housing comprises an elongate handle portion having a distal end and a proximal end; a fulcrum member having a first end and a second end, the first end being rotatably secured to the distal end of the handle portion; a lever arm having a first end and a second end, the first end being rotatably secured to the handle portion between the distal and proximal ends, the second end including means for engaging the upper end of the valve assembly within the pump housing; and a bar connected to the second end of the fulcrum member, the bar including an opening slot for passage of the lever arm therethrough and a tab at one end for engaging the upper end of the pump housing whereby as the handle portion is moved downwardly, the engaging means forces the valve assembly through the pump housing.

Abstract: An air conditioning compressor retaining ring removal and installation tool which when inserted into an installed retaining ring and twisted releases the retaining ring from its housing. The tool has an angled, off-center pin projecting from one end thereof for receipt in the hole in an end of the C-shaped ring.

Abstract: Polysilicon elements of integrated circuits, for example gates (24) or interconnects, are provided with metallic silicide layers (26) in order to take advantage of the lower resistivity thereof. The polysilicon elements are defined on an oxide layer (23) disposed on a silicon substrate (20) before polysilicon metallization. After polysilicon metallization the metal and polysilicon are caused to interdiffuse to form silicide layers (26) covering the polysilicon elements (24).

Abstract: Method for the manufacture of electronic circuits based on thin-film transistors and capacitors.According to the invention this method comprises the following operations: deposition of a layer (102) of a first transparent, conductive material on an insulating substrate (100), first photogravure applied to the first layer to constitute blocks (106) forming one of the plates of the future capacitors, as well as the sources and drains for the future transistors, deposition of a hydrogenated, amorphous silicon layer (110), deposition of an insulating layer (112), deposition of a layer (114) of a second conductive material and second photogravure applied to the silicon layer-insulating layer-conductive layer assembly in order to define the control grids of the transistors.Application to the construction of display screen control circuits or BBD registers.

Abstract: Semiconductor device, such as bipolar transistor, is made by molecular beam epitaxy, wherein a emitter layer (27) and overriding contact regions (28) of polycrystalline silicon are grown continuously on a silicon substrate (23+26) without breaking high vacuum, thus eliminating the adverse interface of natural oxide film under the polycrystalline silicon layer (28) and the adverse donor-acceptor compensation while attaining a well controlled h.sub.FE and enabling a shallow emitter junction.

Abstract: Slotless and toothless wound stators are produced for electrical machines, in particular brushless DC motors, by providing temporary teeth at opposite ends of an iron cylinder with smooth inner wall end-to-end, placing an electrical winding without supporting form against the inner wall and between and around the teeth, pressing the winding against the smooth inner wall by an expandable retaining cylinder, and removing the temporary teeth. A temporary fixture can provide the temporary teeth by radially inwardly extendable and radially outwardly retractable fingers, the fingers being removed by outward retraction through cam means. Alternately, plastic end members with teeth may be glued to opposite ends of the smooth-walled iron cylinder to provide temporary teeth, the teeth being machined off after positioning the winding.

Abstract: An improved cartridge fuse has resilient plugs at opposite ends of the fuse housing through which extend a centered fuse filament held in tension by the defining walls of a plug passage hugging the fuse filament to maintain such tension. The fuse filament is placed in the plug passages by means of a needle which is passed through the fuse housing and the plugs therein to create a path for the fuse filament which, when the needle is pulled from the housing, leaves the fuse filament in a tensed centered condition in the fuse housing.

Abstract: An electrical connector transfer nest for use in transferring an electrical connector from a connector pick-up station to a work station, comprises a frame in which are slidably mounted, a pair of plungers, one of these having means for releasably retaining a connector thereon. The nest is arranged to receive a flat cable between the plungers, so that by moving the plungers towards one another, against the action of a return spring, conductor receiving portions of terminals of the connector can be forced through the cable to receive the conductors. Means are provided for releasing the connector from the nest, after it has been terminated to the cable and as the plungers are moved apart by the return spring. The other plunger may be arranged, releasably to receive, a cover for the connector, the cover having means for stuffing the cable conductors into the wire receiving portions of the terminals.

Abstract: A lead frame (10) having external leads (26--26) and internal leads (22--22). The internal leads (22--22) are made of soft metal to provide bondability to ceramic substrates having a semiconductor chip thereon while the external leads (26--26) are hard metal to facilitate insertion thereof into a PWB. The lead frame (10) is fabricated by providing a hard metal strip (50) with a soft metal stripe (52) along the central portion thereof. Lead patterns (17--17) are punched in the strip (50) in such a manner as to punch the internal leads (22--22) from the soft metal while simultaneously punching most of the external leads (26--26) from the hard metal. The stripe (52) may be formed by annealing, inlaying or a separate piece of soft metal bonded to two outer hard metal sections (56--56).

Abstract: Apparatus for laying a filament includes a tool 10 moveable to follow a predetermined path, the tool comprising a storage chamber 12, 12', opposed outlets 30, 28, 16 and 116, 128 and clamp arrangements 19, 119 associated therewith. In use, filament is fed via outlet 30, 28, 16 through the chamber 12, 12' to protrude from outlet 116, 128. Clamp 119 is actuated and continued feeding causes the filament to be stored. Feeding is continued until the other end of the filament protrudes from outlet 116, 128. The tool is operable to define a gap through which filament may be bodily laterally withdrawn, once its free ends have been attached to respective attachment points.

Abstract: This invention relates to a cam lock knife structure having (1) a main handle assembly; (2) a knife blade assembly pivotally connected to the main handle assembly and moveable from storage/folded condition to an open/usage condition; (3) a cam lock assembly engagable with a portion of the knife blade assembly to hold same rigidly in the usage and non-usage conditions; (4) a convey and actuator assembly operable to be attached to the cam lock assembly for ease of operation and for conveyance purposes; and (5) a sharpener lock assembly which can be utilized with the cam lock assembly to hold the knife blade assembly in various conditions and, additionally, independently removed for blade sharpening activities. The knife blade assembly includes a main support body having a cutting section and cam sections engagable with the cam lock assembly for holding the knife blade assembly in a rigid condition whether in the usage condition or folded non-usage condition.

Abstract: A disposable hair clipping head assembly adapted for attachment to an electric clipper is disclosed. The assembly is characterized by a novel two-piece construction including fixed and movable members formed of synthetic plastic material. The fixed member includes a base and an integral spring having a portion thereof extending in parallel spaced relation from the base. One edge of the fixed member base contains a plurality of teeth. The movable member is arranged between the spring and base of the fixed member, with the spring serving to retain the movable member which is adapted for reciprocal movement relative to the base. One edge of the movable member also contains a plurality of teeth which are arranged adjacent the teeth of the fixed member. The fixed member also includes a pair of lugs integrally connected with the spring, the lugs being adapted for interlocking attachment to the electric clipper.

Abstract: In a device for cutting through automobile belts with a knife, a holder (5) is provided at the lower rim of the window opening of the automobile door and the knife (12) is slidably fitted and held in said holder to extend above the inner upper edge of the lower rim of the window opening. The knife (12) consists of a handle plate (20) and a blade (21), which is protected from being touched in that it is accommodated in a slot (18) extending from the edge of the handle plate (20).

Abstract: Young children often find it difficult to grip and control cutlery since they lack the muscle control possessed by adults. Accordingly, the piece of cutlery described is designed to make it easy for use by a young child and comprises a handle and an operative portion such as a spoon bowl, fork prongs or pusher. The handle is generally of round, barrel-shape for easy fist-like grasping by a small child and has a relatively flattened surface adjacent the operative portion for the ball of the thumb of the child to allow gripping and control of the piece of cutlery between the ball of the thumb and the four fingers grasping the handle. The longitudinal axis of the operative portion is turned in from the longitudinal axis of the handle so that when the handle is grasped, the operative portion is turned towards the body of the user.

Abstract: One side of the base end of a chain saw bar and an opposing abutment member relative to which the base end of the saw bar is releasably clamped include ratchet and pawl structure operative, when the clamping action between the abutment member and the saw bar base end is relaxed, to allow lengthwise saw chain tightening adjustment of the saw bar in a first direction and to prevent lengthwise displacement of the saw bar relative to the abutment member in the opposite direction.

Abstract: A can opener providing a circular cut around the cylindrical wall of a can below the lid and rim which are severed by the cut from the rest of the can. A pair of body members having integrally formed handles are pivoted to one another. A rotatable spindle attached to a driving wheel drives the can opener. A cutting wheel forms a nip with the driving wheel in an operating position to force the cutting edge to penetrate through the wall of the can. A mounting plate carrying the cutting wheel is slidably supported by one body member and is movable by cam means between the operating position and a retracted position as the body members are pivoted between their limits of pivoting. In the retracted position the wheel withdraws into an upstanding guard whose edge abuts the severed top and displaces it.