Abstract: An adjustable knuckle joint device for folding ladders includes in combination: a first coupling member having a first circular junction portion provided with an annular flange and a plurality of openings and bulges therein and a first elongate joint portion extending at an angle from the circular junction portion; a second coupling member having a second circular portion with a flat top surface being movably connected to and in bearing contact with the first coupling member, and a second elongate joint portion extending at an angle from the second circular junction portion; a straight axle fitting pivotally connecting the first and the second circular portions together; and a snap catch positioning assembly operatably fixed on the second elongate joint portion of the second coupling member in conjunction with the first circular junction portion. By manually operating the snap catch positioning assembly, a simple, secure and safe adjustment of both coupling members relative to one another results.

Abstract: A hinge has a catch mechanism including a pressure spring which is arranged in a bush member of plastic material. When the hinge is closed the pressure spring acts through the bush member on a hinge link. A steel pin has a head which rests against a hinge link axle and is provided within the pressure spring.

Abstract: A joint mechanism comprised of two pivotally connected joint members rotatable about a common axis is lockable in one of a series of predetermined positions by engagement of a spring-biased pawl provided within one joint member within notches distributed about the peripheral edge of the other joint member. An operating lever comprised of a forked release element and a handle pivotally connected together cooperates with a control means to control locking and unlocking of the joint mechanism. The control means has radially extending resilient arms formed at the free end with upturned claws which, when projecting through slits formed in one side of the other joint member, prevents engagement of the pawl within said notches, and which, when being depressed into said slits by the release element of the operating lever, permits engagement of the pawl within the notches.

Abstract: A driving seat for use in an industrial vehicle such as a forklift, tractor and combine is disclosed. The driving seat comprises a seat back which is divided into two portions, i.e., upper and lower portions such that the upper portion can be folded backwards relative to the lower portion so as to lower the height of the seat back. The upper portion of the seat back is connected with the lower portion of the seat back by means of a rotary support device which is capable of performing such folding operation of the upper portion of the seat back by simply pressing against the upper portion itself.

Abstract: The method comprises the steps of making a hinge by using conventional materials and treatments and applying, on the edge of the hinge provided for contacting and biassing a ball member, one or more cup members, made of a hard metal material and effective to provide a cam profile configuration.

Abstract: An improved hinge for a collapsible ladder includes a pivot pin which has a sufficiently simple construction to permit it to be fabricated by die-casting on a cost-competitive basis. The simple construction is made possible by an improved axial detent arrangement for a shaft which rotates and slides within the hub and to which the hinge locking pins are secured. The detent arrangement includes a detent bore extending radially biased against the shaft. A suitable detent recess in the shaft is angularly aligned with the detent bore for each locking position of the shaft. Axial alignment of the bore and a recess is achieved by fully extending the shaft out of the hub against the restoring force of a bias spring in the hub. The recess and bias member are contoured to permit disengagement of the detent by rotation of the shaft but not by axially applied forces.

Abstract: Improvements in a foldable multi-position ladder joint in which one side of the locking disk of the second joint member is provided between each notch thereof and the common axial bolt with cams capable of one-way rotation under the driving action of the release element of the operating lever. The other end of the cam shaft returns the cam to its normal position upon pivoting movement of a ratchet hooked with a tension spring. Swinging of the operating lever in disengaging the locking pawl from a notch concomitantly moves the corresponding cam to rotate thereby making way for the release element to pass over and subsequent turning of the cam back to its normal position. Release of the release element is however prevented making possible the closing of the notch in achieving directly the purpose of whether or not the pawl is to be engaged in the notch.References are given here to applicant's prior U.S. applications with Ser. Nos. 532,096 and 543,445 with filing dates Sept. 14, 1983 and Oct.

Abstract: A joint having two joint members which are pivotable with respect to each other about a common axis is lockable in a series of predetermined angular positions by engaging a spring-biased pawl provided within one member in notches formed at the peripheral edge of the other member. In manually operating the joint, the forked release element and the handle pivotably connected with each other act as an operating lever in cooperation with the clawed, spring-loaded control means in controlling locking and unlocking of the joint. The claw like stop portion of the control means, when being pushed to one side within the slot having its length at least twice longer than the width of the notch by the release element in counter-clockwise direction, permits engagement of the pawl in the notches and, upon operation of the handle thereby disengaging the pawl from the notches, returns to rest position under its spring force in clockwise direction.

Abstract: A door hinge assembly combined with a door holding device particularly for motor vehicles has a first and a second hinge member mounting the door for swinging movement between an open and a closed position, a torsion bar spring supported at one of the hinge members and having a load arm projecting over the height of the hinge member and directed parallel to the hinge axis and a pair of abutment rollers rotatively displaced against a spring disc which acts as a brake at the other of the hinge members located a distance from the hinge axis. The abutment rollers operate in cooperation with the load arm of the torsion bar to form a catch device for holding the door at least in the open position and the abutment rollers are formed with different diameters along their circumference and they are rotatably mounted about bearing axes, respectively, which are arranged spaced a distance from each other, which distance is less than the dimension of the larger diameter.

Abstract: A hinge for an opening roof panel for a vehicle comprises a spade member and a socket. The spade member is secured to the one surface of the panel with an arcuate portion projecting in an arc centered on the desired hinge axis. The socket is secured to the frame and has an open-ended arcuate channel, centered on the desired hinge axis, at least one wall of the channel being formed by a wall member mounted on a resilient member which, when relaxed, causes the width of the part of the channel to be less than the thickness of the arcuate portion of the spade member. The hinge can also be used to secure a draught deflector to the front edge of the aperture in the vehicle roof when the panel has been completely removed.

Abstract: An improved hinge construction is provided having cam and spring means for maintaining it in its open and/or closed positions and importantly, having parts enabling it to be adjusted as to its positioning between a door and a door frame after it has been secured in position therebetween. Adjustment in its heighth and lateral relationships may be independently accomplished. A screw is carried by the boss of a screw-on mounting plate and cooperates with a so-called driving dog to effect lateral adjustment between the mounting place and a swing or operating arm and thus, between the door frame and the door, itself. Heighth adjustment is accomplished independently by loosening a mounting or fastening screw that is used to secure the swing arm to the boss, sufficiently to enable cross adjustment between cooperating serrations carried by them.

Abstract: A control mechanism for a door including a first and a second longitudinal bar hinged together at their ends with the opposite ends of the bars being hinged, respectively, at a door and a frame. The hinge device joining together the ends of the bars includes a hinge pin with recesses on one of the bars and a spring loaded locking element on the other bar adapted to engage within the recesses for holding the door in the open position.

Abstract: Device for indexing an arm supporting a rearview mirror or a rearview mirror casing, in which one of the ends of the indexing member is mounted for pivoting about an axis on the support member. The device includes a flange member of a deformable material provided in its center with a resting point by which it rests against the support member on which it is pivotally mounted and at its ends, with two resting points, one of which has locking provisions for locking it with the indexing member, the other cooperating with the indexing member for stretching the flange during the locking and unlocking operations only.

Abstract: A collapsible multi-purpose ladder has ladder stringers which are connected by joints which are arranged in pairs, can be locked in several operating positions, and each have two joint parts which are pivotal about a common joint axle. The first joint part has a two-cup locking disk which is concentric with respect to the joint axle and, along its circumference, has notches which are distributed to correspond to the various operating positions. The notches can receive a spring-loaded locking part which is guided for longitudinal movement on the second joint part, which grips over the first joint part. The locking part can be moved out of a notch of the locking disk by a release lever which is pivotally supported on the second joint part and the release levers of the two joints which are associated with the two ladder stringers are operatively connected by a rod.

Abstract: A door-operating mechanism is disclosed which is particularly suited for use with hingedly mounted swinging glass doors of a refrigerated display cabinet. The door operating mechanism includes an extensible gas spring biased toward an extended condition, and a linkage arrangement operatively interconnecting the gas spring with the door. A portion of the gas spring is movably disposed within a slot defined by the linkage arrangement such that in one position of the gas spring the door is biased toward its closed position, and in another position of the gas spring the door may be maintained in an opened position such as for stocking or maintenance of the display cabinet.

Abstract: This invention deals with a hinge for opening or closing a dust cover of record players, which, in order to keep the hinge body from being exposed, to prevent the opened dust cover from excessively projecting rearwardly and to stably sustain the dust cover at an intermediate opening angle, comprises: a cabinet; a dust cover; a slider disposed vertically slidable in the rear portion of the cabinet on each side; a spring urging the slider upward; a support member removably mounted to the dust cover and rotatably mounted on the cabinet by a hinge pin; and a follower provided to the support member and adapted to contact the head of the slider. The hinge of this invention may be provided, in addition to the above construction, with a means to stably sustain the dust cover at an intermediate opening angle.

Abstract: A door hinge for furniture is made up of a box-like part designed to be set within or inset into a recess in a door from its back side, and has a spring-powered or pressed bolt for acting on a cam face at the end of an L-like support arm. The arm is fixed to the body or frame of a piece of furniture so that in one (or two) positions where the cam face has an inwardly offset of cut-out portion, the bolt will be responsible for a detent effect to keep the door in a shut position or in shut and or open positions. The L-like support arm is fixed to the body of the piece of furniture by way of a base or mounting plate having a guiding mounting ledge for cooperating with one leg of the support arm. The one leg portion has a wedging face and is responsible for guiding the support arm parallel to itself for changing the height of the arm. The arm is mounted on the base plate in position for normal use by a metal screw or the like.

Abstract: Pivotally mounted on the door is an arm which has a stop recess in which there may be retained a fixed roller which is mounted in a bracket member fixed to the fixed post of the door. The arm is applied against the roller under the effect of a movable roller which is mounted on the bracket member and is biased into contact with the arm by a torsion spring which has two windings which are disposed symmetrically on each side of branches of the bracket member.

Abstract: A pressure operated hinge for swingably mounting a door on a frame behind their exposed front portions is of three parts involving a box having pressure elements to be mounted within a back-positioned cavity in the door, a swing arm part that carries a rounded, pin-like guide surface provided with at least one contoured slot therein, and a frame mounting plate part that is adapted to be adjustably secured by a set screw and a tongue and groove connection to the swing arm part. The operating relation between the pressure elements and the guide surface is designed to minimize friction therebetween, and the swing arm is adapted to move into the box to provide a substantially flush positioning when the door is fully closed.

Abstract: A supporting mechanism of a document cover lid to be used for a copying apparatus includes a base of a supporting member mounted to the upper portion of an apparatus housing so as to swing about a horizontal axis. A positioning member is mounted on one of either the apparatus housing or the supporting member has a first frictional surface which is a circular periphery in a vertical plane with respect to the horizontal axis. A contact member is mounted on the other of either the apparatus housing or the supporting member and, has a second frictional surface, which is a circular periphery in a vertical plane with respect to the horizontal axis and is elastically pushed against the first frictional surface. By this mechanism, it is possible to support the document cover lid in an opened position upwardly at an angle sufficient to replace an original document.