Abstract: A locking structure for a spring-loaded, pushbutton pin coupler, the inveon prevents inadvertent or accidental depression of a "button latch" pin which can result in an uncoupled joint. The present locking structure cooperates with a pushbutton pin connector such as is commonly used on collapsible or extendible arms or legs. According to the invention, a conventional button latch pin is provided with a locking plate at its inner end, rotation of the pin after coupling of joint with the pin causes the locking plate to also rotate into engagement with a fixed pin element carried by the structure coupled by the pin, thereby preventing displacement of the pin from the locked position.

Abstract: The invention provides a device for locking the base of a blood centrifugation cell on a rotatable generally disc shaped chuck plate. The chuck plate encloses a plurality of elastic locators which extend radially a slight distance from the periphery of the plate. The plate further encloses a plurality of locking means which are biased to remain within the dimensions of the plate at rest and which are radially extendable by centrifugal force to extend beyond the periphery of the plate. An annular locking ring engages the base of the cell and extends around the periphery of the chuck plate. The locking ring has a plurality of internal recesses for initially receiving the elastic locators, and the locking means during centrifugation to secure the cell to the chuck plate.

Abstract: Apparatus and method for releasably connecting first and second objects, wherein a magnetic end effector may include at least one elongated pin member (10) a proximal end of which is connected to the first object (1) and the distal end of which may be inserted into a receiving portion (4) in the second object (2). Latch members (16) are carried by the pin member (10) for radial movement between retracted and expanded positions for releasing and locking, respectively, first and second objects (1, 2). A plunger member (20) carried by the pin member (11) is axially moveable between first and second positions. In the first plunger position, the latch members (16) are located in the expanded (locked) position and in the second plunger position the latch members (16) are released for movement to retracted or unlocked position. Magnetic end effector (30) is provided for releasable attachment to the first object (1) and for moving the plunger member (20) to the second position, thereby releasing the first object (1).

Abstract: A shock absorber for use in toys comprising a rod for supporting a wheel, a retainer slidably along the rod, and a spring interposed between the lower section of the rod and the retainer which forces the retainer upwardly. These members can be pre-assembled as unit kit. When the shock absorber is mounted on a chassis member, the retainer is depressed downwardly against the biasing force of the spring and the rod is inserted into a bore formed on a chassis member through a opening side groove thereon. After that, the retainer is held in a recess on the bottom of the chassis member so that the rod is reciprocable along the retainer and the bore of the chassis member to absorb the vibration or shock from the wheel.

Abstract: A table leg lock having a spring clip carried by a plate for engaging an annular groove in the table leg. The spring clip when pulled laterally engages a pair of flanges to spread the clip for removal of the table leg. The leg lock has application when supported by a floor or connected to the underside of a table surface.

Abstract: A tension brake or clutch having a quick release torque post providing in a first position, to which it is resiliently biased, torque transmission between a brake or clutch pad and an actuator plate and providing in a second position, to which the post is easily and quickly slid against the resilient bias, disengagement from the brake pad to permit the pad's quick and easy removal and replacement. A latch pin is optionally provided to latch the torque post in the disengaged position.

Abstract: This invention comprises an improved mechanism for latching telescoping articles together and for releasing them from such a condition by the act of rotating them with respect to each other. The mechanism includes a pair of pawls interconnected to each other by a spring in such a manner that the latch heads of the pawls are urged in a plane in opposite directions by action of the spring. The invention is illustrated and described in the context of a table which is mounted to the floor of a vehicle, vessel or the like.

Abstract: A releasable connector (3) is described for connecting a first member (2) to a second member (1), the members (1, 2) being adapted to be inserted into one another. The releasable connector (3) comprises a lock element (4) located in a recess (5) in a surface of the first member (2) and biasing means is provided to bias the lock element (4) to a first position in which the lock element (4) extends from the recess (5) to engage a shoulder on the second member (1) to lock the first member (2) to the second member (1) against withdrawal. A movable release device (7) is located on the second member (1) so that actuation of the release device (7) causes the release device (7) to co-operate with a surface (9) of the lock element (4) to move the lock element (4) to a second position against the action of the biasing means. This causes the lock element (4) to be disengaged from the shoulder on the second member (1) with the release device (4) terminating short of the recess (5) in the first member (2).

Abstract: The invention relates to a receptacle having a base part, a cover part which can be drawn over the base part and a resiliently mounted catch for joining the two parts together. A means for safeguarding against unauthorized removal of the cover part from the base part provides the catch with a crown in a cavity in the base part and associates with the crown a locking mechanism which is also disposed in the cavity and can be actuated from without only by a tool.

Abstract: A detent ball is retained in a recess against a bias spring by deforming the material around the open end of the recess radially and axially inwardly of the recess to define a retaining lip to hold the ball in place, the lip having a substantially part-spherical outer surface. The deformation is accomplished by an embossing tool having a part-spherical embossing surface which converges from an end wider than the recess to an end narrower than the recess. A part-spherical cavity in the end of the embossing tool accommodates the ball during the deformation process.

Abstract: Chuck mechanisms quickly connect and enable quick disconnection of an impeller shaft of a mixer from the drive shaft of the motor unit. A spindle has a keyway which enables a key, either a detent key which is movable in the keyway or a key which is provided by pins extending from the shaft, to be aligned in locking position where the key transfers the thrust from the spindle to the shaft or an unlocked position where the shaft is rotated out of the locking position and may be removed from the spindle. The key is retained in locking position by an outer sleeve or collar having a slot which enables the key to move away from the shaft when the shaft is rotated to the unlocked position. When the collar is rotated to move the slot away from the key, the key is locked against outward movement.

Abstract: A guard for a baby carriage in which armrests have fitting holes facing a front surface and a guard has fitting pipes which are insertable into these fitting holes. Each of the fitting pipes has a biased tab which is engageable with a engagement hole at the side of a cylidrical hole at the back of the fitting hole. An opening button, at the bottom of the arm rest, releases the biased tab for the removal of the guard. Planar covers with rear projections are fittable into the fitting holes.

Abstract: A plug-in connector device comprises a ring-like head portion and a hollow shank. The shank has locking balls which can be held to project outwardly of the shank in a locked condition of the device, and can also move to a retracted position under the control of an axially slidable probe, the movement of which is controlled by an actuator lever on the head portion which can only be moved to release the locking balls from their locked condition on a separate manipulation of a second lever, or in other embodiments a safety catch button, also mounted on the head portion.

Abstract: A hitching device for connecting the shafts of a racing sulky to a harness saddle which includes a harness pin affixed to and extending outwardly from the saddle and a normally locked, spring loaded retractable ball bearing locking devive on the harness pin. A connector assembly is attached to a shaft and retains a rotatable ball provided with an central aperture through the ball and a collar surrounding the central aperture on both sides of the ball. When in the unlocked position the connector assembly slides over the locking device and when in the locked position the connector assembly is positively locked on the harness pin. A spacer is positioned on the harnes pin to maintain the connector assembly at least a preselected distance from the saddle.

Abstract: An assembly which prevents a nut carried by an electrical conduit from decoupling from a connector. The inner periphery of the nut near the rear end teeth which define a pair of surface portions between each pair of adjacent teeth. An adapter has a spring biased detent adapted to be received in the space between an adjacent pair of teeth or in engagement with one of the surface portions. The first surface portion of each pair of teeth extends at a relatively steep angle away from the inner periphery of the nut, and a second surface portion extends at a relatively shallow angle away from such inner periphery.

Abstract: A dog clutch mechanism includes a case, first and second rotatable shafts rotatably disposed coaxially in the case, the second rotatable shaft having an annular groove defined in an outer periphery thereof, a dog piece fixedly mounted on the first rotatable shaft and having first dog teeth confronting an end of the second rotatable shaft, a hub axially slidably mounted on the second rotatable shaft and having second dog teeth meshingly engageable with the first dog teeth, the second dog teeth being movable out of meshing engagement with the first dog teeth under a thrust force in response to relative torque transmission between the first and second rotatable shafts. The hub has guide holes extending radially therethrough toward the second rotatable shaft and a plurality of balls are retained respectively in the guide holes are and engageable in the annular groove.

Abstract: Boom latch system for a boom movable between use and stowage positions. The boom latch includes a latch member that is operatively connected to the power supply which moves the boom, so that that the boom is automatically latched when moved to its stowage position, and automatically unlatched when moved from its stowage position.

Abstract: A tilt telescope steering column comprises a bracket pivotably supporting a housing between first and second pivot limits. The first and second pivot limits may be changed. A pair of screws attach the housing to the bracket and clearance between the screws and the housing is taken up. A tubular member is located within the housing and is axially movable relative to the housing. Axially spaced bearings engage the housing and the tubular member to take up clearance therebetween. A tilt blocking mechanism includes a lock member carried by the housing and movable to a position blocking relative pivotal movement between the housing and the bracket. The lock member is moved against a surface of the housing when the lock member is in its blocking position to take up clearance between the lock member and the housing. A telescope blocking mechanism includes a lock pin which is movable to a position blocking relative axial movement of the tubular member and the housing.

Abstract: An equine animal figure velocipede in the form of a tricycle, having a head member and front legs member fixably attached to a rod means so that the head and legs members rotate in parallelism about the front portion of the main body of the velocipede. A pair of transparent eyes with decorative decals are located on opposite sides of the head member, and an illuminating mechanism is provided inside the head which may be activated by switches on the rein bars on either side of the head.

Abstract: A ball catch for releasably retaining a grooved shaft comprises a hollow bushing, a guide part mounted in the bushing for axial movement, rolling elements disposed between opposing surfaces of the bushing and guide part to facilitate movement of the guide part, and a hemispherical socket seated on the front end of the guide part. A locking ball is disposed in the socket and is seated on a plurality of small bearing balls to facilitate rotation of the locking ball. A spring biases the guide part forwardly. The socket and guide part are formed of deep-drawn sheet parts and are fixedly joined together. The guide part is configured to impart radially outward elastic biasing forces to the rolling elements to eliminate any radial play of those elements between the bushing and guide part.

Abstract: A locking mechanism for fixing an outer part (5) on an inner part (4) having locking members (8) which are guided in apertures (7) of the outer part so as to be radially movable in a limited way. In the locking position, these locking members (8) are supported radially outwardly on a locking ring (10). A control ring (16) retains the locking ring in the open position. For this purpose, the control ring (16) is displaced eccentrically and is supported on a stop (19) associated with the outer part (5). By inserting the inner part (4), the control ring (16) is aligned coaxially by the control members (8) so that a spring (12) loading the locking ring (10) can act to move the control ring (16) across the stop (19) so that the locking position is achieved.

Abstract: The rapid fastener is adapted to achieve a connection in the axial direction and in rotation of two elements and more particularly torque-transmitting shafts. It comprises at the end of one of the elements a socket (8) which is provided with at least one helical slot (14, 16) and on which is axially slidable a ring (18) defining at least one longitudinal slot which is laterally offset relative to the entrance (14) of the helical slot. The ring (18) is biased by a spring (24) toward the entrance of the socket (8). The second element has a stem (4) provided with a driving pin (6) which, in entering the helical slot, urges back the ring but is guided under the action of the spring (24) and the edges of the two slots toward the inner end of the helical slot and is then locked in this position without clearance.

Abstract: The present invention is a ball hitch connector for use with a conventional ball hitch socket. The ball hitch connector includes a spherical body having a polygonally shaped bore to receive a generally cylindrical stud, where the upper section of the stud has a polygonal shape complimentary to the bore of the spherical body. The stud attaches to a generally conical collar, by means of a latch pin through two bored holes, one located in the lower section of the stud and one located in the base of the collar. The stud and attached collar are insertable within a base plate. The base of the collar is polygonal in shape. The base plate is a ring which has an inner cavity of corresponding shape to the collar. The collar and attached stud are held in place by means of the complimentary configured base plate cavity. The stud is secured to the base plate by a fastening means such as a nut and washer.

Abstract: A mechanism for detacheably fitting a fixing member and an engaging member comprising a male fixing member having a head above a recessed neck of a smaller diameter and an engaging member comprising a hollow casing having an engaging body slidably fitted to the inside thereof by way of a resilient member. The fixing member and the engaging member are locked in a not-fit state by engaging the engaging body resiliently urged by the resilient member to the casing against the resiliency. The engagement between the engaging body and the fixing member in a not-fit state is released by bringing the engaging member and the head of the fixing member into press-contact, thereby engaging the elongate aperture of the smaller diameter in the engaging body and the neck of the fixing member, and locking them in a fit state by the resiliency of the resilient member. The frame main body and the resilient member are preferably molded integrally in the engaging body.

Abstract: This connection has, on one of two shafts, a hollow socket (1) which is connected to a driving block (16) whose inner surface forms a frustum of a pyramid for receiving a pyramidal head (24) connected to the second shaft. Furthermore, the socket (1) carries retractable pins (6) urged toward the interior by an elastic system (12, 8) but retained in an outer position by an inner ring (14) which is displaced by the elongated stem of the second shaft when it is fitted in the socket. Notches (30) for receiving the pins (6) are provided on the stem (22) and contribute to the axial locking of the two shafts.

Abstract: A crutch includes a monolithic frame and has at least two different arm-engaging pieces associated therewith. The arm-engaging pieces are releasably attached to the frame by a locking mechanism and one of the pieces is a D-shaped forearm-engaging element and another of the pieces is a U-shaped armpit-engaging element. The arm-engaging pieces include pads in one form of the invention.

Abstract: A connection for quickly mounting and removing wheels from a trailer, without removing or replacing lug nuts. The wheel assembly includes a non-rotating shaft or axle which serves as its journal. This journal is inserted and received snugly within a sleeve rigidly secured to the frame of the trailer, and pin and other connecting elements are added to prevent relative rotation and axial movement between journal and sleeve. Various embodiments are disclosed, including a simple pin dropped into aligned transverse openings in the two members and interfitting members on journal and sleeve which halt inward movement of the journal and its rotation, such as an axial pin and hole, radial slot and key, and touching flat surfaces on the two members.

Abstract: A retainer device is disclosed wherein two retainer plates engage from opposed sides an annular groove formed in an end section of a spindle on which a wheel, specifically a roller skate wheel, is mounted in a freely rotatable manner.

Abstract: This invention relates generally to a coupling system for releasably attaching any one of a number of robotically controlled tools (robotic "hands") to a robotically controlled extension arm. The coupling system tightly locks the hand to the robotic arm by combined air and spring pressure such that, even under heavy duty use, the hand will not unintentionally twist or move relative to the arm, yet the hand and arm may be quickly disengaged by release of locking air pressure and imposition of unlocking air pressure which enables ball means to be cammed out of locking engagement.

Abstract: A settable slip clutch or coupling between a driving (1) and a driven (2) shaft includes balls (11) accommodated in recesses (3) on the driving shaft and in engagement with chambers (18) in the driven shaft. To achieve an unloading effect when the clutch slips, i.e. when the balls are urged from the recesses and into the chambers, thus disengaging the clutch, at least one of the chambers, e.g. (17) and/or (16) is made with a width which is at least 1.5 times as great as the ball diameter. For obtaining a reverse lock when rotation is reversed, this and/or those chambers can be made with a wall plane (7, 8) which is inclined (.alpha.) relative to the normal wall plane direction. Alternatively, a further chamber (15) may have an opening (12) in its one wall to serve as reverse lock.

Abstract: A fluid cylinder assembly comprising a fluid cylinder having ports disposed at opposite ends thereof communicable with a source of fluid under pressure, a piston disposed in said cylinder having a first rod section extending through an end of said cylinder, extendable and retractable relative to said cylinder, the first piston rod section having an axial bore, a second piston rod section having a guide portion disposed in the axial bore of the first piston rod section and axially displaceable relative the first piston rod section, and means for detachably locking the first piston rod section to the second piston rod section.

Abstract: A locking device (6) for connecting a driveshaft (4) to a power take-off shaft (2) includes a coupling sleeve (7) mounted on the driveshaft in which locking members (12) are guided which lock the coupling sleeve against axial movement relative to the take-off shaft. A locking sleeve (14) is movable on the coupling sleeve (7) to lock the locking members (12) against movement or release them. A latch arrangement is provided to latch the locking sleeve in its release position during connection. The latch arrangement includes a stop (24) extending inwardly from the locking sleeve (14) and engageable with a stop (19) on the coupling sleeve (7) by tilting the locking sleeve on the coupling sleeve.

Abstract: A quick release collar for a weight lifting barbell includes a collar body, an axially movable sleeve and a plurality of radially movable balls which are cammed into frictional engagement with the bar. A tension ring rigidly attached to the sleeve has a tapered inner surface portion which controls the radial positions of the movable balls. A coil spring biases the sleeve and tension ring toward a locked position in which the movable balls securely engage the bar. The collar is easily unlocked with one hand so that it can be slipped off the bar.

Abstract: A rotary rock drilling machine comprises a carriage having two ends, a rotary drilling drive arranged longitudinally displaceable on the carriage, a guiding head arranged on one end of the carriage, the guiding head and the rotary drilling drive defining a longitudinal axis of the machine, a drilling rod composed of a plurality of drilling rod parts which are releasably connected with one another, the drilling rod parts having a plurality of screw convolutions, the drilling rod parts having one end having a coupling pin with a snap pin and another end having a coupling bush with an engaging opening for the snap pin, a positioning device in the guiding head arranged to arrest a rotary position of the drilling rod, and an unlocking device for the snap pin, the positioning device including a locking bar which extends substantially parallel to the longitudinal axis and displaceable radially to the drilling rod, and which is insertable in at least one radial slot provided in the screw convolution of the drilling r

Abstract: A trailer hitch ball assembly includes a vertical post for attachment to a vehicle drawbar. The post has a smooth cylindrical upper portion and a circumferential retainer groove for receiving and retaining a ball while permitting rotation of the ball. The ball includes a central bore which receives the post upper portion and a retainer screw for engaging the retainer groove. A threaded lower portion and two nuts are utilized to secure the post on the drawbar. The threaded portion may include an exposed free portion for storing a replacement ball of the same or different diameter.

Abstract: A coupler assembly having male and female coupler members, the female coupler member having at least one linear open ended slot therein adapted to receive a drive pin on the male coupler member, the female coupler member also having an annular opening angularly displaced with respect to the linear slot, the male coupler member also having a depressible locking pin adapted to be depressed by the female coupler member as the drive pin is inserted into the linear slot, the locking pin being positioned to enter the annular opening in the female coupler member when the projection reaches the inner end of the slot, thereby locking together the coupler members.

Abstract: An operating handle for a winch having a four or eight-sided socket which comprises a hand engaging portion, a lever arm and a socket driver, the driver being of square shape and having a spring loaded detent therein arranged to extend outwardly of a side of the driver and engage a wall of a socket, the detent being positioned off-center of the vertical center line of the side of said driver and so positioned as to engage on a wall of an eight-sided socket.

Abstract: An applicator for particulate carpet-cleaning compositions having a cylindrical body formed of relatively rotatable inner and outer concentric cylindrical members in 360.degree. frictional nested engagement, separately attached non-rotatably to opposite wheel members of greater diameter than the body, and having dispensing apertures in cylinder which may be closed by the other depending on relative rotational positions. The cylindrical members are relatively rotatable very easily be opposed manual rotation of the wheels to dispensing positions, a closed position, and a filling position in which major filling openings in the cylindrical members are aligned. The cylindrical members are indexed to exact relative positions for accurate dispensing, spill-free filling and air-tight closure.

Abstract: A coupling device suitable for connecting an externally splined power take-off stub shaft to a corresponding internally splined yoke with a universal joint. The coupling mechanism includes an automatic release to the locked position and locks axially onto the shaft by way of locking balls. A collar with flexible tabs is manually rotatable to the unlocked position and is triggered to rotate to the locked position by the locking balls. When the externally splined shaft is inserted into the internally splined yoke, the end of the shaft trips the balls causing the flexible tabs in the collar to move radially outward, releasing the collar which rotates to the locked position. The collar rotates camming the balls on a formed metal ring inside the plastic collar to the locked position. Rotation is produced by a fully enclosed torsional spring connected to the collar and the yoke and prevents over-rotation in either direction.

Abstract: An ironing accessory is adapted to be releasably carried on the discharge nozzle of a standard hair blow dryer and includes a flat plate having multiple openings discharging hot air from the nozzle. A cylindrical collar carried on the plate insertably receives the nozzle, and resilient grippers are disposed in a radial arrangement on the inside of the collar for releasably attaching with the nozzle. A cam arrangement is carried on the inside surface of a retaining ring and, rotatable therewith, advances the grippers into engagement with the nozzle as a ratchet mechanism retains the grippers in position as the ring is rotated. Resilient pushbuttons disconnect the ratchet mechanism to release the grippers for nozzle removal.

Abstract: In accordance with this invention, a releasable clamping apparatus (10) is constructed having an opening or slot (14) within which a lifting handle (28 or 30) is clamped between retaining latch portions (62, 64) and a clamp assembly (34). The latch portions (62, 64) are supported by openings (56, 58) and are retracted and extended into a slot (14) by spring biased linkage members (78, 80). These members (78, 80) are acted upon by similarly profiled cam lobes (116, 116a, 118, 118a). Dissimilarly profiled cam lobes (126, 128) of the cam member (110) act upon the clamp assembly (34), clamping a handle (28 or 30) against faces (68) of the latch portions (62, 64). The cam member (110) is coupled to a shaft (162) having an operating handle (32), with the shaft (32) also being provided with a detent assembly (202). This detent assembly (202) locks the handle (32) and the shaft (162) in "locked" positions (38 or 40) in the surface (198) of the apparatus (10), which clamps a handle (28 or 30) as described.

Abstract: In a rotary valve assembly including a housing having a valve chamber and a removable cover member defining an end wall of the chamber, a drive shaft journaled in the housing and having an end portion projecting into the valve chamber and a rotary valve disposed in the valve chamber and slidably mounted on the drive shaft end portion whereby the rotary valve may be removed from the housing by removing the cover member and sliding the rotary valve off of the drive shaft end portion and passing it through the opening provided by the removal of the cover member, means for detachably securing the rotary valve on the drive shaft end portion generally consisting of the drive shaft having an opening therein, the rotary valve having an opening therein registrable with the drive shaft opening, a pin inserted in the rotary valve and drive shaft openings when the openings are in registry, and cooperative means disposed on the pin and one of the drive shaft and the rotary valve for yieldably retaining the pin in the open

Abstract: An adapter device for interconnecting a drivable element to a drive, such as a ratchet or an impact tool. The device comprises a body having a connecting shank protruding therefrom. The shank has an automatic lock for locking engagement in a cavity of a drivable element. The automatic lock has a roller bearing displaceable in a bearing cavity formed in a flat wall of the shank. The bearing cavity has an angulated roller guide wall on which the roller bearing is displaced to position the roller bearing to an engaging and disengaged position. A spring biased linkage is connected to the roller bearing to normally bias the bearing to the engaging position. The body is further provided with a locking cavity further having an automatic locking element whereby to connect the body to a drive to impart a motion to the connecting shank.

Abstract: A connector for pipes has two tubular parts each with three angularly spaced inclined bores intersecting the inner surface of the parts and containing balls engaging inclined wedge surfaces and biassed axially by respective springs. In use the parts are drawn together by rotating nuts on studs and the balls grip the pipes and compress a seal, the balls gouging into the pipes. The recesses could be on the outer side of the parts for engaging an external pipe. The balls can move axially and radially in the recesses for accommodating local ovality and engage surfaces over an arc of circumference of the balls. The parts need not be tubular and one part could be closed off to provide an end cap for the pipe in the other to form a clamp.

Abstract: The present invention provides a quick disconnect coupling for a work tool to a machine. The invention in its preferred embodiment provides a coupling having fluid and electrical connections and also providing alignment independent of the locking mechanism. The present invention also is advantageous in that the locking mechanism is protected from the environment when the coupling halves are not mated and also prevents a false lock-up unless the halves of the coupling are mated and aligned.

Abstract: An improved coupling assembly between an actuating member and a shaft is disclosed. It is comprised of locking means on the actuating member for engaging with the shaft in order to secure the actuating member thereto. In addition, an actuating means for actuating the locking means to allow removal of the actuating member is provided. Groove and key means between the actuating member and the shaft is provided to allow the member to be removed longitudinally thereof while preventing rotation of the member about the shaft when the locking means is engaged with the shaft.

Abstract: An assembly for preventing reverse rotary rotation of a disc includes openings having circumferentially spaced-apart ends formed in the disc. The leading end has an abutment surface perpendicular to the plane of rotation of the disc. The trailing end of the opening is ramped. Pins are mounted to a stationary support opposite the openings in the disc and are biased toward the disc. The outer end of each pin is sized to fit within the openings and has an abutment surface oriented perpendicular to the plane of rotation of the disc and configured for complementary mating engagement with the abutment surface defining the forward edge of the opening. The outer end of the pin is an angled or ramped surface. Forward rotation of the disc causes the two ramped surfaces to engage, biasing the pin away from the disc. The pin then slides along the surface of the disc until another opening is encountered at which time the process is repeated.

Abstract: Device for assembling the framework of a temporary exhibition stand; characterized in that the uprights (8) comprise at their top ends longitudinal slots (8.sub.3) situated in the bottom of dovetailed grooves (8.sub.1), the said slots (8.sub.3) terminating at the top end of the uprights which is adjacent the end of the top cross-member which is to be assembled and in that a hub (19) is disposed in these slots, the hub comprising at least one heel (22) disposed transversely in a dovetailed groove (8.sub.

Abstract: A device and system for connecting a car-mounted apparatus comprising a fixing plate installed to part of a car body for supporting the car-mounted apparatus, a female part formed in either the car-mounted apparatus or the fixing plate, and a male part extending from either the car-mounted apparatus or the fixing plate that can be freely engaged with and disengaged from the female part. The invention also relates to a device for supplying power to a car-mounted apparatus by electrically connecting a connector on the car-body and a connector on the car-mounted apparatus, where either of these connectors is installed so that it can freely move and integrally vibrate with the other connector when in an engaged condition.

Abstract: A locking mechanism for a telescoping support, such as a tripod leg, which includes an outer tubular section and a slidable inner tubular section is disclosed. The locking mechanism includes a U-shaped mounting bracket conforming to the cross-sectional shape of the outer tubular section and is held against sliding movement along the outer section by lip portions bent outwardly on either side of the bracket. The bracket is further retained against separation from the outer tubular section by a camming lever pivotably mounted between the two arms of the bracket on the side of the leg section opposite the base portion of the bracket, thereby closing the opening of the bracket. The camming lever is pivotable for cammingly engaging the inner tubular section through a window opening formed in the outer tubular section, thereby to lock the two sections against telescoping movement.