Abstract: A motorized jack assemblage for vehicles. This takes the form of a kit containing a motor and reduction gear linkage adapted to be energized from the cigarette lighter or other source of electrical power in the vehicle. The gear linkage is adapted to drive mechanical coupling means, which keys into and operates a lift jack, which in one case is part of the standard equipment for the vehicle, and in another case is a jack with a specialized base which is part of the kit.

Abstract: A jack (11) is provided with a thumb wheel (10) preferably made of a plastic material. The jack (11) includes a side gear having an end (20) extending out of a side gear housing (18). The housing (18) has an outer peripheral lip (19) which is engaged by the thumb wheel (10). The thumb wheel (10) includes a plate (24) having an aperture (26) therein of a configuration complementary to that of the side gear end (20) so that when the thumb wheel (10) is positioned on the jack (11), the side gear end (20) will be within the aperture (26) and will rotate upon rotation of the plate (24). The thumb wheel (10) also includes a collar (30) having a plurality of slots (33) therein and a circumferential barb (31) near the end thereof. Upon installing the thumb wheel (10), the collar (30) flexes and the barb (31) snaps over and engages the lip (19) on the housing (18). The engagement is only in the axial direction such that the thumb wheel (10) will freely rotate with respect to the housing (18).

Abstract: For supporting a motorcycle in place, a motorcycle stand comprising a substantially H-shaped tubular frame defining therein two cylindrical side chambers vertically disposed at two opposite side with a cylindrical cross chamber transversely disposed therebetween, which cross chamber has set therein a transmission gear set to drive two driving bevel gears to rotate, which two cylindrical side chambers have each an extendible support, which is comprised of a socket, a transmission tube, a T-shaped driving rod, a driven screw bolt, a tube-shaped movable coupling, a movable tube and a shoe, driven by said driving bevel gears to extend out of or received inside said two cylindrical side chambers so as to support said motorcycle in place or permit said motorcycle to be driven to move.

Abstract: This invention is directed to a mechanical means for moving a member such as a gate. The mechanical means comprises a screw which can be extended and can be retracted for moving and for rotating the member. There is a power means for rotating the screw and a control for the power means.

Abstract: An apparatus for adjustably supporting a portion of a wheeled vehicle, which apparatus may be retracted or disengaged from a supporting surface when the wheeled vehicle is put into use. A tubular outer housing is provided for attaching to the vehicle, with second and third tubular members slidably disposed therein. A locking mechanism is provided adjacent an aperture in a wall of the second tubular member for positioning a pin in selectively alignable apertures in a wall of the third tubular member, thereby preventing relative movement between the second and third tubular members. A tension spring engaging both second and third tubular members and located within the third tubular member is provided for biasing the third tubular member toward a retracted position with respect to the second tubular member. A cranking rod and threaded screw member are also disclosed for moving the second tubular member with respect to the tubular outer housing.

Abstract: Small sized lifting apparatus which can adjust the lifting rod up or down to an expected point automatically.

Abstract: A roof assembly exemplarily for use in outdoor theatrical and musical productions comprises a roof trusswork elevated by means of a plurality of telescoping legs. The legs are raised in unison so that the roof trusswork maintains the same orientation throughout a raising or lowering operation. A clamping or locking mechanism is provided for rigidifying the entire structure upon the raising thereof.

Abstract: A tensioning device has a worm gear mounted in a hollow section enabling the longitudinal displacement of a lift member with respect to a hollow section. The hollow section base and the lift member in each case carry a joint bolt, which cooperates with joint heads fixed to the adjustment means. The worm gear permits a very sensitive and exact setting of the spacing between the two joint bolts, which remains unchanged over a long period. In addition, the tensioning device is particularly suitable for orthopedic purposes, due to its small constructional volume.

Abstract: For the handling of portable large containers, lifting and depositing devices are used, which have rack and pinion jacks to be attached to the corners of the containers by brackets. There rack and pinion jacks have tubular winch shanks which are approximately the height of the containers, into which are guided tubular uprights with the racks. Because of tolerance variations, the danger here arises of an impaired guidance of the uprights with the result of a poor operation of the gearing. To avoid this difficulty, a guide tube is connected with the bottom end of each tubular winch shank. Guide surfaces in the guide tube can be produced with great precision and at low cost. The housing of the winch gearing is configured integral with the guide tube. Thus, a small amount of side play can be left between the upright and winch shank without adversely affecting the rack and pinion gearing operation.

Abstract: A platform lift mechanism for theaters, concert halls, etc. The lift device is a module or modules formed of four segments telescopically, vertically extendable or retractable relative to each other, except for a fixed base segment. The platform is secured to the uppermost segment. The second segment carries a rotatable nut adapted to raise and lower an elongated complementary screw secured at its upper end to the third segment. When four modules are used, a synchronizing chain is provided to actuate all modules synchronously. A brake and a motor are provided, either for each module or for all of them. A motor control is also provided.

Abstract: A transporting device for lifting a relatively heavy roll of material to a selected level so that it can be moved and loaded onto production apparatus. The device comprises a platform base on casters that supports a fixed vertical, tubular column, within which is mounted an elongated, rotatable screw threadedly engaged to a ballscrew nut that moves up and down with the column when the screw is turned. Connected to the screw nut by a support assembly is a spindle that extends outwardly at a right angle from the column. The screw is driven by an electric motor mounted on the platform base, powered by the battery and connected through a gear reduction unit to the screw. A handle is attached to the platform base for moving the entire device and controllable switches are provided for moving the spindle up and down within preselected limits.

Abstract: A lifting jack having a first tubular frame member, a second tubular frame member movably interconnected coaxially with the first frame member, and a selectively operable drive mechanism for moving the second frame member relative to the first frame member. The drive mechanism includes a shaft and a bracket fastened to the second frame member and having two aligned apertures for pivotally mounting a shaft. A protective cover is provided for the drive mechanism and is removably fastened to the shaft.

Abstract: A thread stop is provided for a screw jack including at least one elongated, substantially cylindrical screw member having an external thread. The thread stop comprises at least one radially outwardly deformed part in a predetermined portion of a minor diameter of said external thread. This formed part is formed by a method including ductilely outwardly deforming a predetermined portion of a minor thread diameter of the external thread, so as to retain the hardness of the deformed portion substantially similar to that of the remainder of the screw member.

Abstract: A device for splitting wood including worm driven parallel threaded shafts, which shafts mount the wood splitting wedge. Threaded nut means cooperate with the shafts and with the splitting wedge for effecting movement of the wedge along the shafts. A box frame is provided for supporting the wood to be split and for mounting the parallel shafts therein.

Abstract: A manual automobile pusher comprising a spur gear, a large metal gear that is welded to a metal lead screw which is mounted in an open equal sides metal channel, a long equal "leg" angle metal element connected to a large rectangular metal nut which is driven by the metal lead screw, a metal guide with an equal "leg" angle slot mounted on the open equal sides metal channel through which the equal "leg" angle metal element slides, a metal base connected as by a hexagonal head cap screw to the equal "leg" angle member, a metal crank with a non metalic hand handle connected to the spur gear, a bumper attachment connected by a pivot pin to a metal connecting linkage which is attached to the open equal sides metal channel and a belt to secure the manual pusher in a convenient position when it is not in use.

Abstract: Method and apparatus for adjusting the level of fuel rods in a fuel assembly which includes a tool having an end insertable between a fuel assembly nozzle plate and the exposed ends of fuel rods. The insertable end of the tool includes stationary and movable plates, the movable plate having a portion which rests on flanges in a forked end of the stationary plate while the other end of said movable plate is bent in a manner such that it lies above the stationary plate.

Abstract: Disclosed herein is an electromechanical actuator which acts as an analog of a fluid operated cylinder. A tubular piston moves along the axis of a fixed outer cylinder. One end of the piston is fitted with a threaded stud to which a clevis or other load attachment device can be attached. The other end of the piston, inside the outer cylinder, is attached to a coaxial drive nut. The drive nut is threaded onto a coaxial lead screw which passes through the drive nut and clears the inside of the piston. The drive nut is notched at a plurality of locations, the notches corresponding to a plurality of axially extending protrusions on the inside of the outer cylinder. Thus, when the lead screw is rotated, translational motion is imparted to the drive nut due to its inability to rotate relative to the outer cylinder. A small bar magnet is affixed to the drive nut and cooperates with an external reed switch to provide intermediate shutoff points.

Abstract: A vehicle lifting jack has a hollow support leg with a slot extending axially along one side thereof, and a load bearing member is slidably mounted within the leg and projects through the axial slot. The load bearing member is displaced vertically by rotation of a threaded spindle that is driven by a driving pinion and a gear wheel meshed therewith. The gear wheel is associated with an axial bearing that engages a bearing plate, and the bearing plate is mounted at the upper end of the support leg by engagement between projections of the bearing plate and an upwardly open depression at, and a transverse slot near, the top of the support leg.

Abstract: A gear axially drives a jack support element and is adapted to reciprocally move the same along a movement axis. A stop disposed adjacent an end limit of the element movement is adapted to collapse upon exertion of a predetermined force thereagainst whereby damage to the driving gear and driven support element is avoided.

Abstract: A powdered metal gear is disclosed for use in an accommodating screw jack. The gear has a planar face, and teeth of generally truncated tetrahedronal shape are disposed around the circumference. A conical gear undersurface acts, with intertooth recesses, to form a first gear portion of substantially uniform material thickness. Scallop indentations in the undersurface mate with the gear teeth themselves to form a second gear portion of substantially uniform material thickness.

Abstract: A wallboard or panel lift apparatus has a pressure switch positioned on the panel support rack such that excess lifting force will automatically cut off the motor driving the hydraulic lift. The apparatus has a foldable support rack and collapsible wheel-mounting arrangement which simplifies moving from one location to another and requires less space for storage.