Abstract: A rotation control device for a tool is disposed between a handle and a tool head and includes two ratchet wheels, a spring and two C-shaped snap rings. The two ratchet wheels are symmetrically arranged. When pressed, the respective ratchet wheels will be subjected to the same force and move the same distance, thus making the engagement between the ratchet wheels and the tool head more assured, while avoiding the stuck fault and improving the convenience in use.

Abstract: An element is provided for connecting the chords of a lattice system, which consists of upper chords and lower chords, between which struts and/or stays are arranged, to a telescopic boom head. Thereby, the lower chords are directly connected to the telescopic boom head by means of bolts, while the upper chords can be connected to the telescopic boom head by a connecting element of variable length in such a way that—with respect to the connection of the lower chords—the upper chords can be connected to one another at a variable angle, and wherein the connecting element consists of two butt straps which can each be fastened at one end of mutually facing ends of the upper chords and can be connected to one another at different points.

Abstract: Various novel roofing brackets and roofing systems are disclosed. A first embodiment can be considered a roofing bracket to be coupled to a vertical post and a horizontal purlin of a roofing system whereby the horizontal purlin is positioned to support roof panels at a requisite pitch. The roofing bracket includes a reference brace and a clip. The reference brace includes a first brace face positioned planarly parallel with the vertical post and a second brace face extending at an angle angle from the first brace face and positioned planarly parallel with the vertical post. The clip includes a first clip face positioned to be fastened generally flush with the horizontal purlin and a second clip face extending at an angle from the first clip face and positioned to be fastened planarly parallel with the vertical post. The second clip face is coupled to the first brace face at a pivot point such that the clip can be rotated a particular angle relative to the reference brace.

Abstract: An electric device includes a main body, a supporting crutch and a pivot mechanism connecting the body to the crutch. The body is rotated around the crutch through the pivot mechanism. The pivot mechanism includes first and second bearing shims. The first bearing shim has a limiting salient, which has a first sidewall, a second sidewall and an inclined surface. The inclined surface is tilted from the second sidewall to the first sidewall. The second bearing shim has a sliding salient. When the sliding salient is disposed on the first/second sidewall, the main body is positioned at a first/second position. The sliding salient crosses the first sidewall and slides on the inclined surface to the second sidewall by a first force. The sliding salient crosses the second sidewall and slides on the inclined surface to the first sidewall by a second force larger than the first force.

Abstract: An indexer for positioning a limb extension bar used with an examination table. The indexer permits a selective fixed position in the forward and backward directions and a selective fixed position with respect to rotational movement. The indexer consists of a housing and a translator that sits within the housing. A locking member sits within the translator. The locking member has meshing teeth that mate with a similar structure located on the housing to selectively fix the extension bar in a desired position.

Abstract: A wrench combination includes a first wrench and a second wrench. The first wrench includes a shaft and two sockets each formed at an end of the shaft. The second wrench is rotationally connected with the first wrench. The second wrench includes a shaft and two sockets each formed at an end of the shaft.

Abstract: A collapsible stroller including a lockable hinge and a seat assembly pivotally mounted on the stroller frame. With the use of a seat strap attached to the seat assembly, the stroller can be collapsed using one hand. Pulling on the seat strap pivots the seat assembly to a position in which engagement surfaces on the seat assembly engage with the hinge latch of the lockable hinge. Engaging the hinge latch with the seat assembly unlocks the lockage hinge allowing the stroller to collapse.

Abstract: A stroller includes two rear upright tubes and two assist tubes which are respectively connected to the rear upright tubes in parallel by two joint members. At least one folding assembly is connected between the two upright tubes. The rear upright tubes and the two assist tubes reinforce the structure of the stroller. Two adjusting members are mounted to the rear leg tubes and a handle is biased by torsion springs and a pin connected to the handle extends through the adjusting member so as to engage a notch defined in the rear leg tube. A backrest is pivotably connected to the adjusting members which is positioned by engaging the pin with the notch in the rear leg tubes so that the backrest can be leaned in a stable status.

Abstract: The present invention is directed to a fastening system comprising a first mounting bracket rotatably attached to a first assembly, a second mount bracket rotatably attached to a second assembly and a rigid attachment between the first mount bracket and the second mount bracket wherein the attachment enables the first mount bracket and the second mount bracket to rotate together about a common axis and wherein the attachment enables a portion of the first mount bracket and a portion of the second mount bracket to be separated by space.

Abstract: A pivotable tool includes a pair of pivotally interconnected arms disposed in a crossing relationship and having a manually releasable releasing device which locks the arms in a perpendicular open position for use of the tool as a wrench. In each of two ends of the two arms is mounted a socket. A collar is movably received between the two arms and is pushed to release a lock status by a releasing device.

Abstract: A rigging system for flying a vertical stack of loudspeakers includes left and right rigging side frames (15, 17). Each rigging side frame includes a frame structure having a top end (43), a bottom end (45), and rear and front corners (51, 53, 55, 57) which is mountable to the side of a correspondingly sized loudspeaker (13). Each rigging side frame further includes a rear link (59) for pivotally linking the rear corner of a rigging frame of one loudspeaker to the rear corner of the same side rigging frame of another loudspeaker placed in stacked relation therewith, and a cam plate link (61) pivotally attached to a cam pivot point (85) at one of the top or bottom ends of the frame structure in displaced relation to the cam link. Two or more link openings (143) are provided in the cam plate link at different angles about the cam plate link pivot point and at different radial distances from the cam plate pivot point.

Abstract: A position adjusting apparatus for a back of a stroller includes an engaging rod, a controlling slide member, and a positioning block. The positioning block is fixedly connected to at least one handle support rod of the stroller, and has several engaging protrusions each having a positioning gap formed adjacent thereto. The engaging rod is movably received in a lower tube portion of a frame of the back, and is connected to the controlling slide member movable along an outer side of the lower tube portion. A pivotal rod is connected to the positioning block and the lower tube portion, and passes through an elongated hole of the engaging rod to pivot the back frame on the positioning block. The engaging rod is biased by a spring to extend outward from the lower tube portion such that an engaging lower part thereof engages a selected one of the engaging protrusions to fix the back frame in position.

Abstract: A position adjusting means for a back of a stroller includes an engaging rod, a controlling slide member and a positioning block. The positioning block is fixedly connected to one of handle support rods of the stroller, and has several engaging protrusions each having a positioning gap formed adjacent to it. The engaging rod is movably received in a lower tube portion of a frame of the back, and is connected to the controlling slide member movable along an outer side of the lower tube portion, a pivotal rod is connected to the positioning block, the lower tube portion, and passed through an elongated hole of the engaging rod to pivot the back frame on the positioning block. The engaging rod is biased outwardly of the lower tube portion by a spring for an engaging lower part thereof to engage a desired one of the engaging protrusions to fix the back frame in position.

Abstract: A mounting device adapted to be coupled to a portion of a bicycle to adjustably support at least one bicycle component thereon. The bicycle mounting device has a bar clamp and a support member. The bar clamp has a bar clamping portion adapted to be coupled to the portion of the bicycle and a support portion spaced from the bar clamping portion. One of the bar clamping portion and the support portion has a ball joint with a mounting bore formed therein. The support member is slidably coupled to the support portion and adapted to support at least one bicycle component thereon. In the illustrated embodiment, the ball joint is formed in the support portion for adjusting the orientation of the support member relative to the portion of the bicycle. In the illustrated embodiment, gear indicators are supported on the support portion. Of course, the mounting device can be used to support a cycle computer, a speed indicator and the like.

Abstract: A fold latch assembly is provided for use with a collapsible stroller. The fold latch assembly includes a latch slidably connected to an arm of the collapsible stroller, a housing pivotally attached to the latch and slidably attached to the rear leg of the stroller, and a mount fixedly attached to rear leg of the stroller. The latch operates to releasably secure the collapsible stroller in an operative position and may be released to allow the stroller to be biased into a collapsed position.

Abstract: A multiple-fold windproof umbrella includes: a central shaft having a rib assembly pivotally secured to the central shaft, a lower cloth secured to the rib assembly, an upper cloth secured to the central shaft and juxtapositionally retained above the lower cloth, and a plurality of control valves each formed between the upper cloth and the lower cloth secured on the rib assembly and openable for escaping a strong wind blowing into the umbrella cloths; and for automatically restoring the upper cloth downwardly for closing the opening between the upper and lower cloths of the umbrella after the escape of wind.

Abstract: A baby stroller includes a pair of front legs, two handles and two rear legs pivotally coupled together, each of the supports has a member fixed on the upper end of the front leg and pivotally coupled to the lower end of the handle, a sleeve slidably engaged on the lower end of the handle, a knob pivotally secured to the lower end of the handle for engaging with the sleeve, and a protrusion extended from the member for engaging with the knob. The protrusion is retained in place by the knob when the sleeve is biased toward the knob and is disengaged from the knob when the knob is rotated such that the handle is rotatable relative to the front legs.

Abstract: The present invention includes an umbrella which converts to at least two separate canopy configurations. The umbrella has a closed position, from which it can be opened and latched into at least one middle position. Such a middle position can be used as a car window shade to shade the car from sun entering the front windshield. Alternatively, the middle position can be a partially opened position latched in place for use as an umbrella in restricted places such as a seat in an open air stadium.

Abstract: An adjustable steering wheel, preferably for trucks, includes a steering column (4) on an upper supporting arm (3), which is pivoted in a lower supporting arm (2), which in turn is pivotally mounted to a windshield beam, for example, in the cab. A locking device in the form of a first and a second friction plate package (19, 11) with an intermediate conical spring washer package (30) locks the supporting arms relative to each other and relative to the cab. By means of a pair of levers (32, 33), a control cable (36) and a foot pedal, the spring package can be compressed to remove the locking effect of the plate packages.

Abstract: A lockable shock absorber interconnecting the upper portion of a bicycle front wheel fork with a handlebar thereabove provides releasably joinable body extending upwardly from the bicycle fork and pivotally mounting in its upper portion an elongate handlebar arm releasably carrying a handlebar in its end portion. The handlebar arm is biased in an upwardly angled orientation, but movable downwardly against its bias to absorb shock. Biasing is provided by a compression spring carried about a depending spring rod pivotally mounted in the medial portion of the handlebar arm. The lower portion of the compression spring is supported on a bracket carried by the body and the spring rod is slidably carried within a vertical hole defined in the bracket. A horizontal fastening pin slidably carried by the bracket perpendicular to the spring rod is movable from a first position locking the spring rod relative to the bracket to a second position allowing motion of the spring rod relative to the bracket.

Abstract: A folding joint for a foldable playyard having a base frame having two connecting members pivotably secured at the inside for holding two rails permitting them to be held in a longitudinally aligned position or folded up into a collapsed position. The connecting members each have an axial hole at one end for inserting either rail, two through holes on two opposite side walls thereof, and a track connected between the two through holes. The rails each have a pivot hole secured between the two through holes by a headed pin. The two rails are held in the longitudinally aligned position when the head of the headed pin is engaged in one through hole; and the two rails are allowed to be folded up when the head of the headed pin is rotated to the other through hole.

Abstract: A locking apparatus is operative to selectively prevent the folding of a wheelchair of the type having a pair of centrally pivoted cross braces under the wheelchair seat. A bracket member is provided at each end of a pin which is adapted to constitute the pivot for the cross braces. An elongate bar is hinged at one end to one of the brackets and is adapted to be swung into a position between the cross braces so as to obstruct folding. A locking device operates between the other end of the bar and the other of the brackets for selectively retaining the bar in obstructing position.

Abstract: An umbrella includes a plurality of top ribs pivotally secured to a notch formed on an upper end of a central shaft and a plurality of stretcher ribs each pivotally secured between each top rib and a runner slidably held on the central shaft, each top rib being embedded with a reinforcing core rod for strengthening the top rib in order to resist an external force acting upon an umbrella cloth secured on the top ribs.

Abstract: A folding and lock mechanism for a pushcart includes a bracket pivotally mounted at its proximal end on a rear face of a rear leg intermediate opposite ends of the rear leg so that the bracket can be pivotally moved along the rear face of the rear leg between a generally upstanding position and a lower position. A retainer plate is formed on a lower end of a handle grip, and has a bifurcated end of a generally L-shape or inverted Y-shape defined by a pair of engaging arms. The retainer plate is pivotally connected to the distal end of the bracket at that portion of the retainer plate where the pair of engaging arms merge together. One of the two engaging arms is fitted in a groove formed in the distal end of the bracket to maintain the assembled condition of the pushcart whereas the other engaging arm is fitted in the groove to maintain the folded condition of the pushcart. A tubular stopper is fitted on the distal end portion of the bracket and is slidingly movable along the bracket.

Abstract: A load return mechanism is provided having an actuator for driving a load, a load adapted to be driven by the actuator, a first lever driven by the actuator, a second lever attached to the load, and an apparatus for locking the two levers together so that the load can be driven by the actuator and for unlocking the two levers to return the load to a predetermined position upon power interruption.

Abstract: An improved side guide for an aircraft belt loader having a vertical plate member positioned adjacent to and extending along side the belt conveyor frame which plate is supported by a pair of links, one of which has a slot and a cam surface terminating in a notch. A pin attached to the plate member extends through the slot and a lug affixed to the plate member engages the cam surface as the plate member is moved laterally to elevate the plate member, the lug dropping into said notch to lock said plate member in an elevated position.

Abstract: A mounting fastener includes a nut carrier having a pair of oppositely extending resilient wings which extend below the nut carrier and spread as the carrier is slid in a confined track to hold the carrier in position until a bolt or other fastener is threaded into the nut.

Abstract: A quick release hitch for attaching an implement to the arm of a hydraulic excavator comprises a pair of pivotted links, each link having a jaw for engaging a pin on the implement; the links can be jack-knifed to engage or disengage the implement; and locking structures are provided for locking the links together when the implement has been engaged. Preferably, the locking structure is a rotatable cam and/or over-center mechanism.

Abstract: When a baby carriage is in its opened state, the front and rear legs extend in an inverted-V form. Each rear leg is provided with a bracket extending toward the front leg, with a foldable locking rod turnably connected at its opposite ends between the bracket and the front leg. The locking rod is adapted to be maintained in its unfolded state by being held between an attitude control surface fixedly provided on the rear leg and a slider provided on the rear leg and urged by a spring to slide toward the attitude control surface. The slider is formed with an unlocking engagement portion. When the unlocking engagement portion is slid away from the attitude control surface by operating an operating lever, the unlocking engagement portion engages the end of the locking rod to fold the locking rod.

Abstract: An adjustable arm for controlling the horizontal and vertical position of an object mounted at one end of the arm comprises:means for rigidly mounting the end of the arm opposite the end at which the object is mounted;a plurality of interconnected links, a first group of the plurality of links controlling the horizontal position of the arm and the object; anda counterbalancing link among the plurality of links, the counterbalancing link being disposed intermediate the first group of links, the counterbalancing link serving to provide vertical movement of the plurality of links and the object and to counterbalance the weight of the object at the one end of the arm.

Abstract: The invention relates to a collapsible wheelchair chassis of the type including two side frames, which are jointed together by a pair of crossed braces provided with a pivot joint at their middle. According to the invention, the braces are arranged in a horizontal plane in order to obtain maximum compactness of the chassis in its collapsed state.

Abstract: A locking assembly is disclosed which is suitable for releasably locking two articulated pivoting members in a fixed position with respect to each other. The locking assembly comprises a spring biased reciprocating latch, a plunger attached to the latch, and a catch plate adapted to rotate into locking engagement therewith. The plunger and latch are preferably integral with each other, so that the latch contains a minimum number of moving parts. The latch is designed so that simple palm pressure will cause it to disengage from the catch plate, to permit the pivoting members to move with respect to each other. The present locking assembly is of simple design and inexpensive manufacture, and is durable in use. The locking assembly is particularly applicable for use in invalid appliances such as collapsible walkers, where the users have limited manual dexterity.

Abstract: A self-erecting joint for a pair of hinged, tubular members in which the hinging is located at corresponding portions of the members and the opposite edge portions are connected by spring-biased toggle links which in the unfolded position of the members are nested against one of the members in substantial alignment and over-center for securely locking the joint in the unfolded condition.

Abstract: For adjusting the angle of inclination of a motorcycle steering column relative to the frame of the motorcycle the tubular steering column support has, near one of its ends, a pivot connection with the frame whereby its other end is swingable forward and rearward relative to the frame. Near the other end of the steering column support is an eccentric connection between it and the frame. Adjustment of the eccentric is effected by means of a swingable arm projecting rearward from one element of the eccentric and a lead screw actuator connected between that arm and the frame. Adjustment can be made while riding, to accommodate riding speed and conditions.

Abstract: A stay can be used to support a cab of a tilt cab vehicle selectively in a first raised position in which the cab has been pivoted through an angle of, for example, 40.degree. and the stay is in compression, and in a second raised position in which the cab has been pivoted through a larger angle of, for example, 50.degree. and the stay is in tension. The stay comprises an arm pivoted to the cab and an arm pivoted to the vehicle frame. The ends of the arms overlap and are connected by means of a pin which passes through specially shaped slots extending in each arm. The pin is formed with offset pairs of flats which cooperate with the slots in the arms, and the pin can be rotated by a lever which controls operation of the stay.

Abstract: A locking assembly is disclosed which is suitable for releasably locking two articulated pivoting members in a fixed position with respect to each other. The locking assembly comprises a spring biased reciprocating latch, a plunger attached to the latch, and a catch plate adapted to rotate into locking engagement therewith. The plunger and latch are preferably integral with each other, so that the latch contains a minimum number of moving parts. The latch is designed so that simple palm pressure will cause it to disengage from the catch plate, to permit the pivoting members to move with respect to each other. The present locking assembly is of simple design and inexpensive manufacture, and is durable in use. The locking assembly is particularly applicable for use in invalid appliances such as collapsible walkers, where the users have limited manual dexterity.

Abstract: A side stowable swing-around boom extension is pinned on the nose of a telescoping crane boom in a first use position nearly coaxial with the center line of the boom but tilted or offset therefrom at a small angle. Two larger angularly offset use positions of the boom extension are obtained with convenience and with complete safety while the crane boom and boom extension are at a near ground level position. Two slotted tension links are connected between the upper side of the boom extension and the boom nose and are allowed to support the boom extension in either of two major offset use positions automatically as the crane boom is elevated from the near ground level position. In such operation, the boom extension is allowed to rotate around the axis of its lower side pivotal connection with the boom nose while its upper side connection with the nose is released. The lower side connection is biased toward a position corresponding to the nearly coaxial use position of the boom extension.

Abstract: A system is disclosed for attaching a cap of composite material to the exhaust housing of a turbojet. The system consists of three triangular rod assemblies arranged between the housing and the cap. The triangular rod assemblies bear at their ends eyelets pivotally connected to brackets attached to the housing. The connecting rods are connected to the brackets by means of pivot pins, and to the cap by an attachment part and pivots. The attachment part is fixed to the cap by a bolt. The housing and the cap have cooperating bearing surfaces as well as a seal device.

Abstract: A pivotal and movable connection between a pair of members which includes a slot in an offset portion of one of the members to locate the edge portions of the slot in laterally offset parallel relationship. A shaft on the other member mounts a pair of rollers, each engageable with a respective edge portion of the slot under loading between the members in a direction normal to the slot. The rollers are located by spacers engageable with planar portions of the one member and plastic ribs mounted on the one member.

Abstract: A luggage case with a pair of wheels located at the lower edge has a handle assembly that can be folded into a side wall or swung outwardly into pulling (or pushing) relation. A two-part brace maintains a quasi locking of the handle assembly when in the open position such that it may be closed by merely applying a significant rotating force to the assembly about its pivotal interconnection with the case. A latch operates to secure the handle assembly within the case recess when closed or during nonuse and includes a finger actuated button for releasing the latch.

Abstract: An elongated strut having first and second large and small diameter relatively telescoped opposite end portions. The free end of the large diameter end portion includes a mount for mounting a corresponding vehicle side with the strut downwardly and outwardly inclined from the vehicle side. The free end of the small diameter end portion includes a relatively extendable spring biased foot portion for engagement with the ground and a generally horizontal brace is provided including a first end for anchoring relative to the corresponding vehicle side and a second end including clamp structure removably clampingly engaged with the strut small diameter end portion immediately adjacent and abutting the corresponding strut large diameter end portion to limit telescoping of the small diameter strut end portion into the strut large diameter end portion.

Abstract: A tilt mounting having a base member, a pivoted frame, carried by the base member, a receptacle slidably held by the frame, a pair of support rods pivoted at their intermediate portions to said frame and supported at their ends by said base member and said receptacle so that the receptacle can slide back and forth in response to the pivoting of said frame, and means for fixing the receptacle at any desired angular position the tilt mounting can suitably be used for mounting a TV camera or the like on a tripod, and is capable of resetting the TV camera to the horizontal position due to the automatic shifting of the center of gravity to the supporting axis when the TV camera is left at any angle of elevation or when the TV camera is released from its fixing means.

Abstract: A foldable playpen formed by rigid panels, each panel comprising two horizontal bars connected by vertical bars. Adjacent panels are joined to each other by flexible deformable elements which are attached to the ends of the horizontal bars. The panels are each locked in position to form a rigid structure by means of cross members which are inserted between vertical bars of adjacent panels so as to span the angle formed between the adjacent panels.

Abstract: A door holding apparatus holds a door in a preselected position relative to a door support. The apparatus includes a rod which has a first end pivotally connected to the door and a second end for engaging the door or door support. Force exerting apparatus exerts a force against the rod and urges the rod into forcible engagement with the door or door support.

Abstract: An adjustable hinge support assembly for supportably engaging the pintle of a hinge so as to reinforceably maintain the pintle in its fixed vertically oriented operative use position. Spaced-apart pairs of pintle-engaging support arms are provided in association with a hinge. Vertically oriented angle iron wall jamb and door anchor members are positioned along and spaced apart from the hinge. Each pair of support arms is comprised of a first pintle-engaging support arm and a second pintle-engaging support arm. The first pintle-engaging support arm is provided at one end thereof with a pintle-engaging gudgeon portion having an opening therethrough and with a threaded wall jamb anchor member-engaging portion at the opposite end thereof. The second pintle-engaging support arm is provided at one end thereof with a pintle-engaging gudgeon portion having an opening therethrough and with a threaded door anchor member-engaging portion at the opposite end thereof.

Abstract: A locking device for a lift having an arm pivotably mounted for horizontal movement about a lifting carriage with two tubular members each pivotably connected at one end to the arm. One of the tubular members extends into a cylindrical housing and is locked thereto by balls mounted in ball cages urged by a spring to a locking position. The other tubular member is locked to the first tubular member by similar balls, cages and spring. A sleeve longitudinally slidably exterior to the two tubular members includes pins for engaging the ball cages to release the two tubular members.

Abstract: A collapsible tent frame has all of its parts permanently connected to one another to provide a complete single unit and is easily changeable between a fully deployed condition, a partially deployed condition and a compact collapsed condition by simple manual manipulations. In either its fully deployed condition or its partially deployed condition, the frame is adapted to receive and support a tent fabric or other covering to provide a shelter lending itself to a variety of uses.

Abstract: A collapsible wind and/or sunshade screen of the type comprising a screen sheet and a stand supporting the sheet. The stand includes a hub and a pair of outer ribs and an intermediary rib kept together at one end at the hub. The ribs are pivotally carried by the hub on axles in parallel relationship and at least approximately perpendicular to the portion of the screen sheet adjacent the hub. The screen includes means interconnected between the outer ribs and the intermediary rib for releasably maintaining the sheet in a fixed stretched condition.

Abstract: This invention relates to a jib of a public works machine constituted by two elements, a piece for connecting said two elements, and removable means for locking the piece to the elements.The connecting piece is mounted on one element and comprises first holes disposed at the apex of a polygon; the other element comprises second holes separated from one another by distances equal to the length of the sides of the polygon; finally, when the jib is assembled, the connecting piece is fast with the first element via its axis of rotation and a removable pin introduced into a corresponding hole and in a special hole of said first element and fast with the second element via two removable pins introduced into corresponding holes.One application of this invention is the realization of a hydraulic shovel whose overall size is reduced for suitable road-transport.