Abstract: A mounting pin for a pivoted damper blade is disclosed which comprises a cylindrical shaft having a cenrtrally positioned hole extending therethrough, this hole being surrounded on one side of the pin with an upstanding flat seat. This hole is longer than it is wide so that it extends longitudinally of the pin. Also, the pin at one side of the seat is formed to include longitudinal depressions which provide a plurality of circumferentially spaced arc segments which form an interrupted circle. This pin is mounted on a blade at a side margin thereof by means of a bolt extending through a hole in the blade and through the hole in the pin, and a nut is associated with the bolt, the nut locking against the flat seat of the pin. A resilient gasket is interposed between the head of the bolt and the rear face of the blade so that the bolt need not be held while the nut is tightened. Also, a locking washer is desirably interposed between the nut and the seat.

Abstract: A handle bar fixing device for a bicycle, which is used to fix a handle bar to a cylindrical holding portion attached to the utmost end of a lug provided at a handle stem. At the lug is provided a through bore which extends lengthwise of the lug, opens at one end into the holding portion and at the other end onto the stem body, and has a screw thread in part. A control member with two first and second screw threads different in pitch angle and in the direction of screw, is screwed with the through bore by way of the first screw thread. A pusher having a screw member screwable with the second screw thread is supported axially movably only to a first end portion of the through bore opening into the holding portion. The control member is rotated to force the pusher to move lengthwise of the lug so that the handle bar inserted through the holding portion may be fixed thereto.

Abstract: A draft control plate, which automatically opens or closes to provide efficient draft conditions in a furnace, is provided with both horizontal and vertical counterbalance devices which respectively permit adjustment of the initial position of the plate and the sensitivity of its movements. Initially, the plate is partially open where it remains while the furnace is operating under normal conditions. It is then capable of opening or closing in response to changes in the pressure differential across it. Preferably, the plate is horizontally mounted in an auxiliary flue channel which is adjacent to and in connection with the main flue of the furnace.

Abstract: A connecting rod having two clamping rails between which are clamped plates extending in a plane perpendicular to the plane of the clamping rails. The clamping is accomplished by screws. The plates have pivot joints which can be moved into one another at their ends. The connecting rod is adjustable in length.

Abstract: A brush including a molded head that includes the bristles and a handle holder. The handle is made in two pieces one of which slips into the other for securing the handle in a retracted or an extended position. A collar in combination with the handle secures the handle in its retracted or extended position.

Abstract: A lightweight display device capable of vertical adjustment to desired height having a display frame attached to one end of a rod whose other end is formed with a pair of resilient arms having a plurality of teeth for the outer surface. The rod is positioned for ratchet-like vertical movement within a hollow tube having a threaded inner surface which engages with the teeth. The frame can be raised or lowered, along the length of the rod, by extending a vertical force thereto sufficient to deflect the arms of the rod away from the threads of the tube. When the vertical force is removed, the teeth re-engage with the threads to support the display frame at the desired height.

Abstract: A mechanism for use with telescopic tubing to lock an outside and inside tube against longitudinal movement relative to one another. It has an inside stiffener for the inside tube, that is attached to rotate with that tube. And, the stiffener carries an eccentrically mounted element that is wedged into locking contact with the outside tube by rotating the inside tube about its axis, relative to the outside tube.

Abstract: A steering wheel for vehicles, comprising a steering wheel rim to which is firmly connected a steering wheel hub which is arranged for attaching the steering wheel to the upper portion of a steering shaft installed in a vehicle, the steering wheel hub mainly comprising a spoke hub and an inner hub which are concentric and engage with each other, being mutually displaceable in an axial direction. The spoke hub is firmly connected to the steering wheel rim, and the inner hub is intended to be rigidly mounted on the steering shaft. The spoke hub and the inner hub are connected to each other via a locking means which locks the respective hubs radially and allows mutual axial adjustment of the hubs, whereby the steering wheel can be caused to assume alternative positions in height relative to the steering shaft.

Abstract: The invention relates to locking means for telescopically adjustable tubes and includes a support which is mountable in an inner tube. A stem is connected to or is integral with the support and a resilient bushing member is provided on the stem. In addition, a locking member is mounted on the stem which is capable of engaging with an outer tube but that on operation of the invention the adjustable tubes are locked relative to one another.

Abstract: An adjustable coupling structure for the support of lighting fixtures, pipe support racks, and the like utilizes an adjustable coupling device to couple two threaded support rods. The coupling device includes a clearance hole and a parallel threaded hole through a rigid body. The minor diameter of the threaded hole is tangent to the clearance hole thereby providing meshing of the threads of the two rods. Adjustment is provided by turning either of the threaded rods.

Abstract: A telescoping tool includes a plurality of telescoping tubes interconnected by coupling means each of which comprises an exteriorly threaded sleeve secured to one end of an outer telescoping tube and having an inner outwardly tapered surface a part of which is of the configuration of a truncated cone, a tubular wedge having an outer surface of complementary configuration to said part of the inner surface of said sleeve together with an outwardly projecting coupling element preferably in the form of an exterior flange together with a cap sleeve having internal threads and which is threadedly related with the exterior surface of the sleeve and arranged when tightened to force the tubular wedge into the sleeve and toward the adjacent end of the outer tube so as to grip frictionally the exterior surface of an inner telescoping tube and thereby to secure the telescoping tubes together in frictional relationship, an inner recess or groove being formed interiorly of the cap sleeve and adjacent its cap portion for re

Abstract: An extendible and pivotal steering column for a vehicle having a wedge lock extension mechanism for providing an extension and pivotal arrangement of the upper end of the steering column pivotally mounted within the operator station of the vehicle.

Abstract: An angle dozer assembly including a C-frame supported by a tractor. A pair of thrust members extend rearwardly from a moldboard and each terminates with a carriage which is slidable along the C-frame and adapted to be maintained in different positions by a locking fork arrangement.

Abstract: A pivoting member, especially the air flow rate meter of an internal combustion engine is disposed on a hub which surrounds a locally fixed shaft. Extending inwardly from the hub is a protrusion, for example a pin, which penetrates an opening in the wall of the shaft which is hollow at this point due to a blind bore extending axially into the shaft. The protrusion is held between two balls or rollers which are located in the blind bore and held in position by cooperation of a spring and an adjustment screw. The adjustment screw has a counter nut which bears on the end face of the shaft and also has gear teeth which engage a first set of threads of a pinion. The pinion has another set of threads of opposite and slightly different pitch so that rotation of the pinion causes differential rotation of the counter nut and permits very precise axial positioning of the hub which carries the pivoting member.

Abstract: A locking device in a telescopic tripod leg assembly comprising at least two leg elements, for releasably fixing one of two inner and outer leg elements relative to the other in an extended position of the tripod leg assembly. An outer leg element and a frame secured thereto are provided in their walls with an aligned through-opening, and a locking lever having a cam portion at its end is pivotally connected to the frame so that the cam portion is positioned within the aligned through-opening. A pressure piece is placed on the wall of the inner leg element within the through-opening and a spring piece is supported on projections at both sides of the pressure piece. When the locking lever is pivotally moved downward, the spring piece is pressed by the cam portion thereof and curved into a groove between the projections, whereby the inner leg element can be positively fixed relative to the outer leg element by the elasticity of the spring piece.

Abstract: An apparatus for the releasable, force-locking connection of two telescopically arranged tubes, especially for clamping the steering housing tube in the steering fork tube of a bicycle or the like, comprising an expanding cone axially displaceable within the tube defining an inner tube by means of a threaded spindle. In order to avoid, during clamping, deformation of the inner tube and thus frictional connection between both tubes along only a circular engagement line at the lower end of the inner tube and to eliminate the effect of the unavoidable play between the outer diameter of the inner tube and the inner diameter of the outer tube, the outer surface of the expanding cone bears against wedges. The latter are each arranged in a respective guide slot formed at the inner tube, extending parallel to the lengthwise axis of the tubes and having a closed contour.

Abstract: Adjustable support for a high jump bar, provided with a horizontal platform (2) for bearing one of the free ends of the bar. The support comprises an arch shaped member (6) one of the branches of which is connected to the support adjacent to the horizontal platform and the other branch of which is flexible and extends at least approximately vertically towards the base of the jump post in order to guide the bar in its fall.

Abstract: The invention comprises an externally mounted locking mechanism for telescoping tubes that permits releasable adjustment of the tubes to any telescoping position relative to each other and utilizes multiple cam action locking means operating both longitudinally and circumferentially relative to the tubes. Two preferred embodiments are disclosed, a two-piece structure and a three-piece structure, both of which are preferably molded from a plastic material.

Abstract: A crutch construction of the "Canadian" type that includes an elongated lower support assembly on the uppermost end of which a universally adjustable hand rest is interconnected. An upper forearm support assembly is provided with a forearm cuff member, the vertical axis of which is generally aligned with the vertical axes of the hand rest and the lower support assembly, wherein the forces exerted by the weight of the user on the crutch are transmitted directly through the aligned lower support assembly and hand rest for distribution to the hand of the user as located on the hand rest and through the forearm of the user as positioned in said cuff member.

Abstract: Retractable apparatus for supporting an element such as the arm rest of a seat. The arm rest is movable from a retracted position adjacent the seat to an extended position above the seat by pulling it upwardly, slightly inclining it to one side, and then pushing it downwardly to lock it in the extended position. The apparatus comprises a pair of elongated members adapted for attachment to the seat and to the seat arm, respectively. One member is telescopable within the other and each includes complemental engagement portions freely movable relative to one another during movement of the arm rest to its extended position. The engagement portions are engageable when the arm rest is tipped to one side, thereby misaligning the longitudinal axes of the elongated members and locking the arm rest in the extended position. Various forms of engagement portions are disclosed.

Abstract: Adjustable connector for connecting two tubular bodies such as pipes includes an outer sleeve connectable to one body, an elastically deformable inner sleeve connectable to the other body and accommodated within the outer sleeve and a fastening element to fasten the sleeves and the bodies together while causing elastic deformation of the inner sleeve. Overall pressured embracement of said other body by the inner sleeve deformed by the fastening element assures easy and reliable connection of the two bodies, avoids development of damages on the surfaces of the bodies even after repeated fastening and results in stably durable connection of the two bodies thanks to uniform distribution of fastening pressure over the entire portion of the inner sleeve surface.

Abstract: This invention relates to a locking structure for a pair of extensible or telescopic poles in which one of the poles has an upstanding bolt secured therein, carried on the bolt are a pair of frusto conical members having their tapered portions in facing engagement and being moveable along of the bolt, disposed between said frusto conical members is a split ring having angled or beveled inner surfaces corresponding to the adjacent tapered faces of said frusto conical members and an expandible nut threaded onto said bolt having a body portion compressible to have a pressure fit within the other of the poles and a locking washer holding the same onto said bolt whereby the rotation of pole in which the expanding member is disposed will move said expanding member downwardly of said bolt causing the frusto conical members to move toward each other thereby expanding the split ring therebetween causing the split ring to move outwardly into locking engagement with the adjacent wall surface of the first mentioned pole.

Abstract: Tube coupling for coupling an inner and an outer tube, wherein the inner tube extends into the outer tube and projects out of the terminal end of the outer tube: a receiving member with one sleeve portion that receives the terminal end of the outer tube to be coupled and another sleeve portion around the inner tube; a split tightening ring is held inside the receiving member, is anchored in the receiving member against shifting around in it and is squeezable against the outside of the inner tube; the split tightening ring has tabs that are squeezed together to squeeze the ring against the inner tube.

Abstract: A handlebar system for connecting the bicycle handlebar to the front fork structure in which the portion of the stem in the front fork structure is expandable by the use of a rubber block inside the said stem shank while the connection of the handlebar to the stem is effected by a cap mounted on the stem and removable therefrom to release the handlebar.

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 locking system which enables a pair of telescoping members to be slidably movable with respect to each other and locked in a pre-determined position. The outer telescoping leg is generally of cylindrically configuration and has an aperture therein. A sleeve, also having an aperture formed therein, is rotatable about the outer surface of the outer leg. A brake lug is positioned in the leg aperture and the sleeve aperture is of tapered thickness about the leg axes. Rotation of the sleeve about the outer leg causes the brake lug to press against the outer surface of the inner leg and prevents the legs from moving along the leg axes.

Abstract: The plunger tube of the handle-bar stem adapted to be blocked in the fork tube of the vehicle is provided at its end with at least one inclined outer face. A nut adapted to cooperate with the inclined face has the same number of inclined faces which are inclined in the opposite direction. An expanding member is tightened against each face of the tube and against the corresponding face of the nut and urged outwardly by the translation of the nut axially of the plunger tube so that the nut bears against the fork tube and blocks the two tubes.

Abstract: The described locking mechanism permits two or more rods to be quickly fitted together and adjusted to a fixed, predetermined length. The locking mechanism is of a type such that the rotation of the rods by approximately 45.degree.-90.degree. automatically fixes the rods in place.

Abstract: A manual suspension support, in which a pair of tubes are telescoped using a vacuum source. A slidable piston in a cylinder is selectively brakable by manipulation of a handle which also carries a valve operable to vary the vacuum in the cylinder.

Abstract: A gardening tool that includes a handle portion having a plurality of tines depending therefrom and a second plurality of tines of shorter length, which are adjustable in alternating arrangement with the longer tines. Each tine of the second plurality of tines includes two telescoping portions surrounded by a clamp with a variably tapered internally threaded section. The variable taper within the clamp facilitates the clamping together of the two telescoping portions of the tine.

Abstract: An attachment for a trailer hitch to eliminate essentially all the play in a coupling of a trailer hitch head to a trailer hitch drawbar includes an adjustable spacing means to space the hitch head from the drawbar. The distance between the two ends of the attachment is adjustable in a direction parallel to the longitudinal axis of the trailer hitch. One end of the attachment is mounted on the drawbar and the other end of the attachment is mounted on the hitch head. When the spacing means is adjusted the hitch head is moved relative to the drawbar in a direction parallel to the longitudinal axis of the hitch to eliminate essentially all of the play in the hitch.

Abstract: The closure counter-balance is for attachment as a strut between a hingedly mounted movable closure and a support structure. The counter-balance includes a pair of tubular members telescopingly connected together in sliding relationship. A compression coil spring within the members urges the members apart. Means are provided to frictionally lock the tubular members together in any given relative position thereof. Means are also provided to pivotally attach one end of the counter-balance to the support structure, said means including a release mechanism for easy disengagement thereof. The other end of the counter-balance is provided with latch means which cooperate with means on the support structure to lock the counter-balance in the closed position.

Abstract: A safety lock device for lifts or the like includes a pair of elongated inner and outer members. The inner member is movable longitudinally relative to the outer member between a retracted position and a plurality of extended positions. The lock device includes friction brake means carried by the inner member for automatically locking the inner member against movement toward its retracted position from any extended position. The brake means provides free extending movement of the inner member from its retracted position to its extended positions. A selectively operable releasing means is movable from a brake armed position to a brake releasing position for providing movement of the inner member from any of its extended positions to its retracted position. Operating means automatically move the releasing means to its brake armed position upon movement of the inner member from its retracted position toward its extended positions.

Abstract: A housing to fit over a drill contains a pair of sleeves with facing inclined surfaces that approach each other to force a washer located between the surfaces into an inclined position to lock onto the drill. A spring located on each side of the washer extends to the adjacent sleeve.

Abstract: This invention relates to a trench shoring assembly which includes a pair of spaced-apart side walls for vertical disposition within a trench. Spreader pipes and spreader collars interconnect the side walls and allow limited pivotal movement between the side walls. Each side wall includes outer and inner metal plates connected to a horizontally extending hollow top beam which extends longitudinally along the top of the side wall, two intermediate beams parallel the hollow metal beam and a bottom beam. A hardwood insert is disposed within the top beam to prevent the collapse of the hollow metal beam. A number of hollow beams extend perpendicularly to the horizontal beams and ribbed members extend perpendicularly to the horizontal beams. The side walls of the assembly have a tapered bottom portion which defines a triangularly shaped pointed lower extremity extending between the ends of the bottom portion.

Abstract: A post of uniform cross sectional shape for installation uprightly on the outside of a balustraded window or the like for use as one of the supports of the balustrade. The post includes a pair of opposite side walls each having an undercut groove formed lengthwise thereon. A pair of brackets of identical construction are provided separately, each comprising a mounting plate at one end and a pair of clamping jaws at the other end for engaging the post therebetween. The mounting plates of the brackets can be screwed to the window frame, and the post engaged between the clamping jaws of each bracket is connected thereto by a bolt inserted into and through a hole in each jaw and secured by a nut received in one of the undercut grooves of the post.

Abstract: A cavity tuning assembly for use in a tuned cavity having provisions for coarse tune adjustment and fine tune adjustment for changing the frequency of the cavity's resonance. Coarse tune adjustment is obtained by sliding an unthreaded cavity tuning rod of the cavity tuning assembly up and down through a threaded bushing to obtain rough tune whereupon the unthreaded rod is locked into place by way of a knurl nut compressing a split end portion of a shaft lock screwed onto the threaded bushing into friction engagement around the cavity tuning rod. Fine tune adjustment is obtained by rotating the unthreaded rod into engagement with the shaft lock and the threaded bushing causing the threaded bushing and engaged structure to screw into or out of a pipe reducer to obtain fine tune which is then locked against the threaded bushing by a lever lock nut.

Abstract: A locking member is positionable within an opening in the arm and is likewise engageable with a post and slidable jointly with the arm along the axis of the post to initiate a clamping force. A shaft having a handle assembly on one end is threadable in the locking member and hand rotatable to move the locking member laterally relative the post to secure the arm and post together at selected positions relative each other. A spring means in the handle assembly provides increased turning torque as the lock is tightened and at a preselected designing load, a brake member overrides the washer to prevent further hand tightening.

Abstract: A locking device adapted to lock a driven member automatically against the force which applies thereon comprising a locking plate which has an arbitrary length and locking flanks on both sides thereof; a locking member which has contact members with which locking flanks of the locking plate contact and pins; a drive plate which has contact sides, formed at about right angles to the longitudinal axis of the locking plate, with which the pins are in contact and a drive member thereon; and an operating plate which has a first sliding flank approximately paralleled to the longitudinal axis of the locking plate, along which one of pins of the locking member slides and a second sliding flank inclined to the first sliding flank along which another pin of the locking member slides. The contact members are generally pressed against the locking flanks of the locking plate by a suitable resilient.

Abstract: A wedge lock wheel assembly for mounting a tire rim in which the assembly includes a hub rigidly attached to the rim having a chamber with a centerline substantially perpendicular to the disk, a plurality of stops and a plurality of pairs of paired ramps with a known hardness having complex angles relative to the disks, a plurality of sets of paired wedges positioned within the chamber capable of relative motion therebetween and having an aperture passing through each of said pairs, a generally flat and bottom surface, a slope top surface and a hardness greater than the hardness of the ramps, a plurality of restraining members for limiting the motion between sets of said wedge pairs, an axle having horizontal contact surfaces with a hardness greater than the hardness of the wedges and a plurality of connecting elements passing through said wedge apertures for establishing contact between said ramps and said slope surfaces and between said bottom surfaces and said contact surfaces.

Abstract: An improved handlebar assembly able to withstand a standard rotational torque test comprises a front fork whose tubular stem has an interior flat area which mates with an exterior flat area on a tubular handlebar post slidably received in the fork stem so that the two members are fixed rotatively, but are free to slide axially to adjust the height of the handlebars. The height adjustment is set by a special tubular collar which slidably engages over the top of the fork post. A set screw threaded into the side of the collar extends through an opening in the wall of the fork stem and bears against the handlebar post, thereby pressing the two flat areas together.

Abstract: A positioning device for motor vehicle adjustable steering columns which includes antifriction strips disposed between slideably engaged inner and outer sleeve members and a locking cam member to allow locking at infinitely variable axial positions of the sleeve members.

Abstract: A locking mechanism operates to selectively lock and unlock a pair of telescopic tubes. A lock base is fixed to one tube and is formed with an eccentric pin. A lock ring is slidably disposed within the other tube and is slipped over and carried by the eccentric pin. The external configuration of the lock pin and cross section of its associated tube are polygonal or multi-sided to prevent relative rotation. By relatively rotating the tubes in only one direction locking is accomplished and by relatively rotating the tubes in just the opposite direction unlocking is effected. The overall end-to-end length of the tubes can be adjusted by unlocking them, sliding one axially relative to the other and then locking them again.

Abstract: A device for fastening the cap upon the rear portion of the body of a fountain pen or another writing article, comprising an annular member disposed inside said body and provided with axial extensions, each of which is provided with a part arranged to protrude, through a corresponding perforation of said body, with respect to the outer surface of the body itself in order to cooperate with the inner surface of said cap, is described. Each of said extensions is deformable by flexion such as to generate, in consequence of said flexion, pressures between said parts and the inner surface of the cap when said cap is put on said body.

Abstract: In a tripod with adjustable telescoping legs wherein each of said legs comprise an inner and outer leg, both being of prismatic configuration and a polygonal cross-section. Said inner and outer legs are adapted to be wedged together in a locking position by a releasable, spring-biased, roller bar disposed between said legs.