Abstract: A toggle clamp includes a movable first pin having an axis and a stationary second pin. An arm is carried by the first pin for rotation in a first direction applying pressure to a load and a second direction releasing the pressure. An exterior spring element is coupled between the first and second pins. The spring element exerts a spring force that biases the first pin toward the second pin. The spring element is releasable for exchange with another spring element to change the spring force.

Abstract: A pneumatically powered clamp that completely encloses the actuating linkage assembly in a fluid-tight, lubricated environment. The clamp includes a pneumatic cylinder longitudinally and removably secured to a plastic body by brackets. The body has a bore to receive a piston rod, and a cavity in communication with the bore. The cavity allows room for the linkage assembly to be pivotally held and cooperate in the body. The bracket substantially seals the body needing only a nylon washer to establish a fluid-tight seal. The linkage means converts the linear motion of the piston rod into rotational motion in the clamp arms which are securely held outside the brackets.

Abstract: The clamp is a locked over-center toggle clamp having a toggle lever that actuates a clamp arm between clamped and released positions. An amplification lever is secured to a cam pivot for rotation of the cam pivot inside a base. One end of the clamp arm is pivoted to the cam pivot to act as a follower so that rotation of the cam pivot cams the clamp arm to amplify the hold-down force of the toggle clamp.

Abstract: A work piece stock holding member that can be adjusted by a single handle or adjustment nut usable with a conventional channeled toggle clamp fixed to a working surface. The holding member has an internally and externally threaded collar having a single piece joined clamp engaging unitary washer. The collar's internal threads are received by the external threads of an inserted supporting bolt. An upper end adjustment handle is fixed to the supporting bolt to rotate in unison with the bolt. The vertical adjustment of the holding member relative to the working piece is performed by rotating this bolt's upper handle. On one side of the clamp's channel is another separate holed washer which bears against one side of the clamp, moves on its hole pass the central bolt and bears against an adjustment nut mount on the collar's external upper threads.

Abstract: This invention relates generally to a manual toggle clamp for use in fixturing. The clamp includes an operating arm that is pivotally supported on a support block and a pair of outboard clamping links which share a common pivot axis and are supported on the support block. A pair of intermediate links interconnect the operating arm and the clamping links such that movement of the operating arm causes the clamping links to rotate. The elements of the clamp are configured such that they form an over-center linkage which prevents the clamping links from being moved out of a clamping position except by movement of the operating arm. The outboard clamping links provide a mounting surface for one or more clamping arms of the type typically used with power clamps.

Abstract: A plunger clamp capable of locking in either a retracted or extended position having a rigid body slidably supporting an elongated plunger. A bifurcated lever is pivotally connected inside the body and to a V shaped link arm, the link arm is pivotally connected to the plunger where the link arm translates the angular motion of the lever to drive the plunger between the retracted and extended positions. Essentially the entire linkage assembly is housed in cavities formed by the body during actuation of the lever.

Abstract: A holddown device has a clamp arm pivoted on a base. The clamp arm has a hook end extending outwardly from the pivot. A tail extends outwardly from the pivot at an acute angle to the hook end. A cam is pivoted on the base. The cam has a camming periphery engaging the tail. The cam is rotatable in one direction to a locking position and in the opposite direction to a release position. The cam, upon rotation to the locking position, swings the clamp arm from a retracted position to a clamping position. A link pivotally interconnects the cam and the tail of the clamp arm.

Abstract: A device for attaching an experiment carrier to a space station handrail is provided. The device has two major components, a clamping mechanism for attachment to a space station handrail, and a pointing carrier on which an experiment package can be mounted and oriented. The handrail clamp uses an overcenter mechanism and the carrier mechanism uses an adjustable preload ball and socket for carrier positioning. The handrail clamp uses a stack of disk springs to provide a spring loaded button. This configuration provides consistent clamping force over a range of possible handrail thicknesses. Three load points are incorporated in the clamping mechanism thereby spreading the clamping load onto three separate points on the handrail. A four bar linkage is used to provide for a single actuation lever for all three load points. For additional safety, a secondary lock consisting of a capture plate and push lock keeps the clamp attached to the handrail in the event of main clamp failure.

Abstract: An incremental multiple-forced vise of epicyclic gear train type mainly comprises basic components of vise's main body and movable jaw etc. to accommodate a lead screw, two sets ( i.e. double-layer ) of epicyclic gear train and a buffer device.

Abstract: An apparatus for locating a workpiece on a processing surface includes a first locator arm assembly, a second locator arm assembly, and a pivotal member. The first locator arm assembly includes a first surface disposed for lateral movement and mating engagement with a first portion of the workpiece. The second locator arm assembly includes a second surface disposed for lateral movement parallel to the first surface, the second surface further for mating engagement with a second, opposite side, portion of the workpiece.

Abstract: A board straight-lining tool to be used in conjunction with a conventional circular blade table saw for the purpose of cutting a new straight and square edge longitudinal through a board. A board requiring this new edge is placed on a base of the board straight-liner, wherein a series of toggle clamps with pressure collapsing tips are toggled closed. This secures the straight-liner to the board. A separate detachable guard support is secured to the table saw with the circular blade protruding vertically through the guard support or the blade may protrude to the fence side of the guard support. The guard support keeps the board on the same plane as the table saw table and also adds a safety feature to aid in preventing the straight-liner from coming into contact with the circular blade during the cutting operation. The board is guided past the circular saw blade while keeping the straight-liner against the table saw fence.

Abstract: A toggle lever clamp for use in devices and welding machines in the motor vehicle industry, has a clamping head consists of two shell-shaped parts that combine to form a housing. This arrangement reduces the number of individual parts to a considerable degree and protects sensitive parts on all sides against dust, dirt, and water spray, as well as welding spatter, while permitting ease of movement of the clamps.

Abstract: A pneumatically actuated clamp and gripper including a fluid actuated piston and cylinder assembly and a clamp arm supported for pivotal movement and having a moving end for clampingly engaging a workpiece. The clamp includes a link having one end pivotally connected to the clamp arm for causing movement of the clamp arm and the other end of the link being connected to the piston. The clamp also includes a frame assembly for supporting the clamp arm for pivotal movement, the frame assembly including a pair of frame halves clamped together in face-to-face relation and housing the projecting end of the piston and clamp arm therebetween. The frame assembly includes a pair of pivot pin bores for selectively and alternatively supporting the clamping arm for pivotal movement about a first pivot axis and a second pivot axis. The clamp also includes a roller assembly for supporting the drive member connected to the link for reciprocating movement and for preventing wear of the drive member and the frame components.

Abstract: The clamping device with a mechanical force amplifier comprises a threaded spindle (9) which can be screwed into a stationary nut and is connected rotationally fast with a housing (10) enclosing the force amplifier (13-16). A first clamping member (13) is arranged rotationally fast with, but slidable in, the housing (10) and a second clamping member (14) is arranged rotatably in the housing. A plurality of tightening pins (15) are arranged between the clamping members (13, 14). In between the second clamping member (14) and a drive shaft (28) there is arranged a planetary gear (30). Planetary gear (30) has a sun wheel (31) arranged on the drive shaft (28), an annulus is connected to the housing (10) and a carrier formed by the second clamping member (14). A spring-biased detent coupling (38) is provided between the housing (10) and the second clamping member (14).

Abstract: A stand for supporting a cut tree trunk in a vertical position includes a tree trunk encircling clamp, having a first curvate locking jaw and a second curvate locking jaw each having a free end and a base end. The base ends are pivotally connected to each other at a base. The locking jaws include a serrated inner surface convexly curved in a radially inward direction facing each other for closure with a tree trunk. A locking clamp includes a rigid handle fixedly secured to the base end of the first locking jaw and a pivoting handle pivotally secured to the second pivoted jaw adjacent the base end of the rigid handle. The pivoting handle extends radially outwardly to respective distal free ends of the first and second curvate locking jaws. An adjustable locking shaft is threadedly mounted within the rigid handle and extends radially inwardly thereof. A pair of elongated locking toggles are pivoted at a respective inner pivot end in the first curvate locking jaw and in the pivoting handle.

Abstract: A new adjustable woodworking clamp for holding elongated workpieces end to end for being joined. The inventive device includes an elongated base plate. A fixed arm is fixedly secured to the base plate. The fixed arm extends angularly upwardly from the base plate for supporting a first workpiece. A pair of shoulder bolts extend through the elongated base plate. A sliding plate is provided having a pair of slots therethrough for coupling with the pair of shoulder bolts. The sliding plate has an interior flared end. A sliding arm is secured to the sliding plate. The sliding arm extends angularly upwardly with respect to the base plate for supporting a second workpiece to be joined to the first workpiece at a predetermined angle. A pair of clamps are coupled with respect to upper ends of the fixed arm and the sliding arm for securement of the workpieces.

Abstract: A plunger clamp that provides a positive clamping force in each direction and an over center locking force in each direction, both while providing a low profile relative to the axis of the clamping force when closed in either direction. The clamp has a toggle arm pivotally connected to the plunger support above the axis of the plunger to allow the plunger to clamp at each end of its stroke, without requiring a 180.degree. rotation of the handle.

Abstract: A power actuated gripper for engaging and holding a workpiece wherein a cam surface is pivotally linked to a reciprocating actuator for actuating at least one of a first and second jaws between a clamped position, wherein the first and second jaws engage and hold the workpiece, and an unclamped position, wherein the first and second jaws disengage and release the workpiece. The reciprocating linear actuator provides a fluid motor with a piston and piston rod for providing linear reciprocal movement. The piston rod is connected to a coupling member which is pivotally connected to a pair of linkage members for each of the first and second jaws. A pair of lever arms are pivotally connected to the linkage members and are integral with a shaft link. The cam surface is formed on the shaft link and actuates a cam follower, biased toward the cam surface, connected to the first and second jaws.

Abstract: A manually operated mechanical rod holder has a support arm pivotally mounted on a drill rig chassis. A fixed jaw is mounted on an outboard end of the support arm. A movable jaw is mounted on a plate secured to a sleeve carried by the support arm. The sleeve is connected to an outer end of a sliding block that is slidably mounted in the sleeve. An inboard end of the block is connected to an outer end of an arcuate spring section integral with an operating lever. The inner end of the spring section is connected pivotally to an end of a link, the other end of which is pivotally mounted on the support arm. An inboard end of the operating lever has a handle. The throw of the movable jaw with respect to the fixed jaw remains constant. The distance between the movable jaw and the fixed jaw can be varied to accommodate different sizes of pipe or rod.

Abstract: An adapter plate for removable attachment to a U-shaped lower jaw of a set of toggle clamps is disclosed. The adapter plate is constructed of a rigid metal suitable for providing a backing for a joint to be welded by means of a MIG welding or arc welding process such as copper or brass. The plate is triangularly shaped and includes upper and lower broad flat surfaces, a base side and a pair of adjacent sides extending from opposite ends of the base side and intersecting at a predetermined angle to form an apex. The plate contains beveled edges for clearing the rounded inside cornters of a pair of angle iron workpieces when said workpieces are placed against one or more sides of the plate to be positioned relative to one another for being held by the clamps for welding the workpieces together or for other purposes.

Abstract: A new Portable Sheet Metal Brake System for facilitating bending of metal, more particularly sheet metal, at various angles up to ninety degrees in a simple, controlled, and accurate procedure while compact enough to be transported to remote working locations. The inventive device includes a side support member, a flat base member secured orthogonally to the lower portion of the side support member, a flat anvil member movably secured to the side support member, a retaining means secured to the side support member and the flat anvil member, and a bending means rotatably secured to one end of the flat base member for bending metal.

Abstract: A power operated clamp assembly 10 includes a clamp body 12, a reciprocatable member 20 extending into the clamp body 12, and a clamp arm 22 pivotally mounted to the clamp body 12 by a first pivot element 36. The clamp arm 22 is pivotable about a pivot axis 38 of the first pivot element 36 between first and second positions of movement termination C and D, respectively. A linkage assembly 46 has a drive end 48 adjustably secured to an end 56 of the reciprocatable member 20, and a clamp end 50 operatively secured to the clamp arm 22 so as to pivot the clamp arm 22 as the member 20 reciprocates. The linkage assembly 46 includes a connection pivotable about the pivot axis of a second pivot element 80. The drive end 48 is adjustable with respect to the end 56 of the reciprocatable member 20 so as to allow adjustment of the first and second positions C and D, respectively. One pivot element of the first and second pivot elements 66 and 80, respectively, includes an eccentric shaft having a central axis 124.

Abstract: A clamp has a clamping arm pivotally mounted to a base frame for swinging between clamping and unclamping positions. An actuator, such as a pneumatic cylinder, provides bidirectional forces for swinging the arm. The arm is driven by the actuator by way of an articulated linkage system including at least one spring link and one rigid link. The spring link preferably has a C-shape.

Abstract: A pneumatically actuated clamp and gripped including a clamp arm supported for movement about a pivot, the clamp arm including a workpiece engaging portion spaced from the pivot and a driving member that is reciprocally moveable between a retracted position and a clamping position. The clamp further includes a link connected to the driving member and connected to the clamp arm in spaced relation from the pivot so that movement of the driving member from the retracted position toward the clamping position causes movement of the workpiece engaging portion of the clamp arm toward the workpiece, the link including a spring portion, the spring portion limiting the clamp force applied by the clamp arm to the workpiece.

Abstract: A toggle clamp which includes a handle for actuating a toggle mechanism between a clamped or released position. The toggle clamp, including a latch assembly for locking said toggle clamp in a clamped position to prevent unintentional movement of the toggle clamp when the toggle clamp is in either a closed, clamped position or an open, unclamped position. The latch assembly includes a pivotal lever member which engages complementary notches located in a locking disk attached to the clamp base.

Abstract: An improved carpenter's clamp is provided for easily securing a workpiece. The clamp has a C-shaped frame that can be mounted to a holding surface. The frame has a top and a bottom receiver aperture. A slide bar is slidably mounted in an axial direction within the top and bottom receiver apertures, and a handle is pivotally attached to the frame to provide a downward axial force to the slide bar when the handle is lowered. A toggle link is provided allowing the handle to be locked in a downward position thereby locking said slide bar in a secured position. A holding arm having a holding tip at a distal end is slidably mounted to the slide bar, and the slide bar is positioned between a pair of bias pins on the holding arm so that a workpiece can be held between the holding surface and the holding tip when a downward force is applied to the handle.

Abstract: A bar clamp having a locking pliers, toggle action clamping mechanism is herein disclosed. The locking pliers includes a fixed handle, a movable handle, and a toggling linkage arrangement therebetween for toggling the locking pliers from a first open position to a second clamped position. An extension bar is connected at one end to the fixed handle. The bar clamp includes an adjustable outer clamping jaw slidably connected to the extension bar. The outer clamping jaw includes disengagable locking mechanism for disengagably locking the outer clamping jaw in any given position along the length of the extension bar. The bar clamp also includes an inner clamping jaw connected to the toggling linkage arrangement such that when the locking pliers are toggled into the clamped position the inner clamping jaw is caused to move toward the adjustable outer clamping jaw.

Abstract: A workpiece is clamped to a machine table while being machined, but a cantilevered portion of the workpiece is subject to vibrations. The cap of a vibration damping unit is supported on the machine base and spring-loaded upwardly against the workpiece. A support spring acting on a seat forces a damping element against the cap which, in turn, is impressed against the cantilevered workpiece. Vibrations are suppressed by horizontal shearing motion of the ring damping element. The entire damping assembly comprising the cap, ring damping element, seat and spring are retracted from the workpiece by means of a central rod connected to a manually actuated toggle clamp.

Abstract: Angle adjustable clamps are described which include a pair of jaws connected to pliers-type handles. At least one of the jaws includes two faces, and the angle between the faces is adjustable. The clamps are useful for gripping and supporting workpieces at a desired angle to each other.

Abstract: The method and apparatus for the manufacture of product subassemblies by computer programmed robots is an end effector fixture assembly, or geometry station wherein at least two individual elements of the particular subassembly are dimensionally positioned relative to one another between a lower base fixture and an upper fixture of the end effector fixture assembly to establish a net location therebetween. The robot manipulates the end effector fixture assembly and transports the two individual elements located therein to a work performing station located within a defined region of the robot to perform work on the subassembly.

Abstract: An adjustable wrench has jaws (1, 2) which automatically lock up when a predetermined force is applied to the handgrips (2, 3). The jaws (1 and 2) are closed by forcing together hand grips (3 and 6) which holds pivot F against rubber stop (8) mounted in the housing (9), which in turn is mounted on brace arm (7); pivot D is moved towards brace (7), thus straightening line CDE and rotating jaw (2) and pivot C anti-clockwise about pivot B. When the jaws close on to a workpiece W, resistance is met and further movement of D towards arm (7) is arrested in favor of the over-center linkage arms (4 and 5) whereupon eccentric cam (11) locks rod (10) against anvil (12) thus holding jaw (2). The over-center lock on the hand grip (6) locks and is prevented from going further than just over-center by a stop G which bears on to the inside of the hand grip.

Abstract: A mounting fixture for a vibration table which can compensate for work pieces that have different dimensions. The fixture includes a support block which has an elongated slot that allows the fixture to be adapted for work pieces of different lengths and widths, and a pair of clamping blocks which have corresponding chuck and groove features that can compensate for different work piece thicknesses.

Abstract: A cutting apparatus is comprised of a transverse beam, a plurality of knife holders that are slidably connected to the transverse beam, a counter roller against which the knife holders are pressed for a cutting action, and a clamping device for fastening the knife holders to the transverse beam. Each knife holder comprises a housing and at least one knife, whereby the housing has a projection and a support on one side for receiving the transverse beam therebetween. The clamping device is comprised of an actuating lever, a connecting part, and a movable clamping member whereby the actuating lever is connected to the securing member by the connecting part for actuating the securing member and fastening the knife holder at the transverse beam. The securing member may be a bolt which is axially slidable within a bore of the projection of the housing, and the actuating lever is preferably pivotably supported at the projection.

Abstract: An improved carpenter's clamp is provided for easily securing a workpiece. The clamp has a C-shaped frame that can be mounted to a holding surface. The frame has a top and a bottom receiver aperture. A slide bar is slidably mounted in an axial direction within the top and bottom receiver apertures, and a handle is pivotally attached to the frame to provide a downward axial force to the slide bar when the handle is lowered. A toggle link is provided allowing the handle to be locked in a downward position thereby locking said slide bar in a secured position. A holding arm having a holding tip at a distal end is slidably mounted to the slide bar, and the slide bar is positioned between a pair of bias pins on the holding arm so that a workpiece can be held between the holding surface and the holding tip when a downward force is applied to the handle.

Abstract: Disclosed is a workpiece retention assembly including a plurality of measuring fixtures for supporting and positioning a workpiece. The measuring fixtures are aligned along a platform for positioning the measuring fixtures. The measuring fixtures include a selectively adjustable stanchion and a selectively rotatable clamping member for retaining the workpiece. Workpieces of widely varying types, shapes and sizes can thus be positioned using the measuring fixtures according to the teachings of the present invention.

Abstract: A die press unloader which retrieves material from beneath the lower die of a pair of dies mounted in a die press. The material which is retrieved will have passed through the lower die, and can comprise either scrap, for example in making perforated strip or product, for example in making shaped blanks from a strip. The unloader utilizes a combination of gravity and a mechanical arm, preferably actuated by a double-acting air cylinder, the movements of which are controlled by the press itself.

Abstract: The clamp element includes a rapid feed device combined with a force amplifier. The force amplifier is surrounded by a rotatable feed sleeve, which engages through an external thread in a female thread of a surrounding housing. A first tightening member is fixed and a tightening clamp member is rotatably arranged in the feed sleeve. Two tightening pins are arranged between the two tightening members. The tightening pins are supported on the second tightening member the smallest possible distance from the feed sleeve axis. An actuating and tensioning rod is passed either through a central aperture in the first tightening member (FIGS. 7-11) or through two diametrically opposite, lateral aperture of the first tightening member (FIGS. 1-6).

Abstract: The clamping force adjusting device for a clamp device comprises a hollow housing (1) supported on a movable clamping part of the same, through which housing passes a rotatable and slidable tension rod (5), whose first end can be coupled to a force amplifier and whose second end (5b) carries a tension sleeve (6) fixed thereon. The tension sleeve (6) is supported on Belleville springs (9) through a thrust bearing (8) and an intermediate sleeve (b 10), the Belleville springs being supported directly in the housing (1). An adjusting sleeve (13) screws into a fine thread (14) of the housing (1) and has at its end facing the Belleville springs (9) a radially inwardly directed first stop shoulder (16), which cooperates with a radially outwardly directed second stop shoulder (17) of the intermediate sleeve (10) and/or a spacer ring (18) bearing on the thrust bearing (8).

Abstract: A mechanical clamping device adapted to engage and secure the upper tooling of a welding knee. The clamping device is motor driven such that several clamping devices can be simultaneously and synchronously operated to engage, align and secure the upper tooling from a remote location. The clamping device includes a clamping lever actuated by a cam mechanism. The clamping lever has an upper end provided with a cam follower, a lower engagement end for engaging the tooling, and a journalling region. The engagement end is adapted to closely engage a corresponding feature on the tooling. The journalling region of the clamping lever is slidably journalled in a bushing which includes a biasing member for biasing the cam follower against the cam mechanism. The clamping lever is pivotably attached by the bushing to the cam mechanism which serves to both rotate the clamping lever and bushing together and stroke the clamping lever within the bushing to secure the upper tooling to the welding knee.

Abstract: A machine vise with force amplifier comprises a fixed jaw (2) and a movable jaw (3) on a vise body (1, 1a, 1b), the movable jaw being adjustable by means of a threaded spindle (14). The force amplifier (9, 10, 11) is enclosed by a rotatable tightening sleeve (6), which engages by means of an external thread (7) in a female thread (8) of a housing (5) around the sleeve. Within the tightening sleeve (6) there are arranged a first tightening ring (9) fast against rotation and a second tightening ring (10) rotatable to a limited extent. A plurality of tightening pins are provided between the two tightening rings (9, 10). The stationary housing (5) is arranged in the vise body (1, 1a) beneath the fixed jaw (2). The second tightening ring (10) is fixedly connected to the one end (13a) of a pull rod (13) passing through the first tightening ring (9) and the threaded spindle (14), on the other end (13b) of which rod there engage an adjusting sleeve (21) and an operating lever (15).

Abstract: A power clamp is provided that clamps the workpiece when the piston rod is retracted into the cylinder housing thereby preventing damage to the rod and clamp components that could occur from weld flash and other debris created while operations are performed on the workpiece. Other features are disclosed which increase reliability and enable a variety of different arms to be used with the basic clamp construction.

Abstract: First and second elongated members are slidable along each other to form a beam of variable length to span the top surface of a structure on which a worker is positioned. Clamping surfaces extend from the ends of the beam to engage the sides of the structure. A lever pivotally mounted on the first elongated member is connected through a link to the second elongated member to shorten the beam and urge the clamping surfaces against the structure. A worker's safety line may be attached to the device such that the lever is locked relative to the first elongated member to secure the device to the structure whenever the safety line is attached.

Abstract: A power clamp having linear bearing tracks for actuating toggle linkage characterized by a combination of fixed and moving cover elements completely enclosing the bearing tracks to prevent intrusion of foreign materials.

Abstract: An adjustable angle vise is provided for clamping a cable to a fixed structure in order to free the hands of a person making cable connections. The vise comprises two vise-grip pliers, with the pincers of one having flat resilient blocks adapted to grip a fixed structure, and the pincers of the other having resilient blocks with varied diameter channels to grip a cable. The two pliers can be connected together at varied angles by toothed connecting hubs. The cable-gripping pliers has at least two such hubs oriented perpendicular to each other, to allow orienting the cable either along or perpendicular to the fixed structure.

Abstract: An adaptor handle for use on wheeled vehicles having two spaced-apart handles for application of propulsion forces and steering formed by an elongate arm extensible between the spaced-apart handles of the wheeled vehicle which includes a clamp adjacent each end thereof to enable the adaptor handle to be rapidly coupled onto the spaced-apart handles and a single hand grip extending substantially from the center of the arm. The clamps are formed as over-center latches having an adjustable plate which allow the adaptor handle to be used on wheeled vehicles having differing sized handle grips. Additionally, one or more auxiliary hooks are provided to enable storage of desired items upon the adaptor handle during use.

Abstract: The present invention relates to a shearing machine in which the upper shearing blade can be easily adjusted and positioned. The upper blade is held on a pivotal plate member which is pivotally held on a ram by means of a hinge means to be rotated to adjust of the position of the upper blades. In addition, a hold down member is provided for holding a work-sheet. The hold down member is arranged to be urged by a toggle joint to hold the work-sheet at a reduced speed with an increased force after coming into contact with the work-sheet. A scrap removal member is also included in the shearing machine such that scraps can be easily removed without mingling them with the finished sheets. The scrap removal member removes scrap without idle time between feeding the work-sheets to be sheared. The shearing machine is so arranged that scraps are taken away directly to a scrap box as soon as the work-sheet has been completely sheared into its finished product.

Abstract: A clamping device with a mechanical servo mechanism having an axially movable plunger (3) and a clamping sleeve (6) which surrounds the servo mechanism and which engages by an external thread (6a) in an internal thread (2a) of a stationary housing (2). A clamping member (7), one end of which is supported on the plunger (3), is axially slidable in and non-rotatably connected to the clamping sleeve (6). Furthermore, an abutment (9) connected to an operating lever (10) is rotatable to a limited extent in the clamping sleeve (6). Between the clamping member (7) and the abutment (9) are disposed several studs (11). The external thread (6a) is provided directly on the outer circumference of the clamping sleeve (6), concentrically to the region of the clamping member (7) and the studs (11). A compression spring (15) is supported at one end on the housing (2) and at the other end on the plunger (3, 4 ), and acts via the latter on the clamping member (7).

Abstract: The power operated clamp secures a workpiece relative to a work piece support and includes a cylinder having a reciprocal piston and connected piston rod projecting from the cylinder. A bifurcated hollow housing is connectable to the cylinder and has an elongated internal guide slot with a free end of the piston rod extending within the guide slot. A pair of coaxial apertures having a common axis offset and the perpendicular to a longitudinal axis of the guide slot are formed in the housing. A rod end is connected to the free end of the piston rod for reciprocal movement and is slidingly guided within the guide slot. A pivot pin is rotatably disposed within the coaxial apertures for angular movement about the common axis and has an end extending externally from the housing and a lever arm extending internally within the housing.

Abstract: An adapter handle for use on wheeled vehicles having two spaced-apart handles for application of propulsion forces and steering formed by an elongate arm extensible between the spaced-apart handles of the wheeled vehicle which includes a clamp adjacent each end thereof to enable the adaptor handle to be rapidly coupled onto the spaced-apart handles and a single hand grip extending substantially from the center of the arm. The clamps are formed as over-center latches having plural contact shoes and shoe spacers which allow the adaptor handle to be used on wheeled vehicles having differing sized handle grips. Additionally, one or more auxiliary hooks are provided to enable storage of desired items upon the adaptor handle during use.

Abstract: A locking hand tool has an adjustable jaw and an opposing movable infinitesimally adjustable jaw, a fixed handle and a movable handle and lever-locking means therebetween for establishing and maintaining a toggle relation between the jaws when in a closed position, an extension bar at a fixed angle to the fixed handle, means for supporting and moving the movable jaw along the extension bar, and means for holding it securely at any position, whereby a user can clamp on and hold a workpiece securely with the use of only one hand.