Abstract: A cam for locating and holding a windshield in an automobile during installation and cure includes a body having a bore in the bottom providing a journal for guiding rotation of the body in an arc around the bore. A lever arm projects from one side of the body. A nose projects from the opposite side of the body. A cam surface on the nose includes a ramped portion sloped outwardly and downwardly, having a planar section and an arcuate section.

Abstract: An apparatus for assisting the mounting of a tire-wheel assembly onto an axle in a high precision without eccentrically arranging the assembly from the axle comprises a pair of opposite clasping members sandwiching the tire-wheel assembly from its side surfaces therebetween, a vibration applying machine fixed to one of the clasping members, and a fastening means for temporarily fastening the clasping members at a given position.

Abstract: A quick setting and release actuator for cooperating with an axially movable chuck for holding a tubular workpiece in fixed position includes an anchor member (12) that is mounted in fixed relationship relative to a housing of a machine tool (20) and a thrust member (42) carried by a pivotally mounted carrier member (38) that pivots towards and away from the anchor member to drive the thrust member (42) into engagement with the end wall (44) of a multi-segment collet (26) to cause the collet to ride along its segment bearing surfaces (30) in a radial direction to engage the periphery of a workpiece (24) to be retained in the machine tool (20). Thrust member (42) may be pivotally mounted by a pivot connection (48) on the carrier (38) so that the thrust member will align itself with the end wall (44) of collet (26) even when the carrier is not precisely parallel with the collet end wall.

Abstract: A locking extension for a tool table includes first and second rails slidingly mounted to opposing sides of the tool table and an extension having a support surface fixedly mounted to and spanning the first and second rails. A locking assembly for locking both of the rails to the tool table at a desired position includes a first linkage member having an axis and being longitudinally movable relative to the axis by a pair of cooperating cam blocks. A second linkage member is biased and is operably connected to the first linkage member by a pivot member. The linkage members each have a rail engaging element mounted to an end thereof that is engagable with its respective rail to lock the rails into the desired position and disenageable with its respective rail to unlock the rails from the desired position. The locking assembly includes an actuator operably connected to one of the cam blocks for moving the locking assembly between the locked and unlocked states.

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 clamp for clamping a workpiece comprises a base member a clamping member mounted on the base member for linear movement relative thereto and a drive member mounted on the base member for rotary movement relative thereto. First and second cam elements comprising a face cam are provided on the drive member and the base member, at least one of the cam elements including at least two portions of different pitch. The arrangement is such that rotation of the drive member relative to the base member causes linear movement of the clamping member relative to the base member.

Abstract: A device for clamping two bevel-cut strips (24) so that they may be joined to each other comprises slides (20) for clamping the strips (24) and a displacement member (36). The slides (20) are L-shaped in cross-section, are displaceable at right angles to each other and are located in guides (34) mounted on a base plate (10). Each slide (20) is associated with a displaceable clamping member (46) which engages the respective strip (24). The guide (34) of each slide (20) has sufficient play in the vertical direction so that the vertical position of the slide (20) on the base plate (10) can be adjusted before the strips are joined (24).

Abstract: An apparatus for open-heart surgery includes a platform (20) to support the surgeon's hand (or an instrument) and a cam (30) for reciprocating the platform oscillation around a hinge (12). The cam is shaped so that the pattern of the platform oscillation follows the beating heart's motion. The platform motion triggers a momentary-contact switch on each cycle. The switch drives a pacer, which paces the heart to beat in synchrony. The platform rate is set slightly above the un-paced heart beat rate; this keeps the heart in close synchrony with the platform oscillation and stabilizes its motion. The platform and heart move together, relative motion is canceled, and the surgeon need not compensate. The platform is mounted (10) on an adjustable support and a laser beam is used to angularly align the platform to the heart oscillation.

Abstract: A clamp for clamping a workpiece comprises a base member, a clamping member mounted on the base member for limited linear and rotational movement relative thereto and a drive member mounted on the base member for rotational movement relative thereto. First and second cam elements are provided on the drive member and the clamping member and arranged such that relative rotation of the drive member and the clamping member produces relative linear movement thereof. The clamp includes a lost motion mechanism whereby rotation of the drive member can produce limited rotational movement of the clamping member without causing linear movement thereof.

Abstract: A clamp for clamping a workpiece includes a body member having a bore with a longitudinal axis, a plunger mounted in the bore for sliding movement relative to the body member and a handle pivotally mounted on the body member and operative to drive the plunger in the direction of the longitudinal axis. The body member is mounted on a bracket for rotation relative thereto about the longitudinal axis.

Abstract: Apparatus for holding a snowboard in a stable horizontal position during snowboard base preparation and maintenance, which apparatus also employs mechanism permitting the board to be swung around into a vertical orientation and held there in a stable manner for board edge maintenance procedures. An improved three-point support arrangement which provides substantial support of the snowboard for base preparation and wherein an intermediate support can be quickly and readily swung out of the way to allow the board to be moved into a vertical orientation for edge maintenance. The apparatus may be provided with clamps for securely engaging the ends of the snowboard and holding it firmly in position during repair and maintenance procedures. The apparatus is adaptable for use with a very wide variety of snowboards having different lengths, widths, board tip angles and board thicknesses.

Abstract: A clamping apparatus for use in tying fishing flies is disclosed that includes a vise with parallel first and second extended portions with aligned holes, and a trigger pin disposed through holes that has a circular and flat first end adjacent to the first extended portion and a threaded second end adjacent to the second extended portion with a knob screwed on the end. The clamping apparatus also includes a trigger with a circular portion that has pinhole offset from a center of the circular portion. The pinhole is aligned with a pinhole in the circular portion of the trigger pin, and a pin is disposed through the pinholes. The vise is attached to an arm that is attached to a base. Two legs extend from the base to support the clamping apparatus. Foot joints are located at the ends of the legs and are connected to a flexible member that stabilizes the clamping apparatus. A neck cord is also provided so that the vise may be used in the field at a stream or lake.

Abstract: A convertible woodworking jig comprising multiple components suited to making specialty woodcuts necessary for the manufacture of rails and stiles of cabinet door frames from standard milled wood stock. The jig has a base having a planar work surface, a first fence having a first straight edge, and a second fence with a second straight edge, between which edges a first cam assembly is medially positioned. The cam body is rotatably positionable for wedging a freely-positionable pressure block tight against a work piece, which is selectively positioned against one of either the first straight edge or the second straight edge. The work piece being so secured, a biscuit slot may be cut into the mitered end by use of a guide assembly disposed at an operative end of the second fence, which assembly closely guides a hand-held, power cutting tool at a predetermined angle formed relative to the plane of said second straight edge.

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 bicycle carrier for fixedly retaining a bicycle on a vehicle roof (1) comprises a carrier device fastened to the vehicle roof and having a longitudinally extending support member for the wheels of the bicycle and an upwardly extending arm with a gripping device (8) for gripping a frame tube of the bicycle. The gripping device has two clamping jaws pivotable towards and away from one another and interconnected via a cog arrangement. One of the clamping jaws is connected to a draw bar having its lower and connected to an operating member at the lower end of arm.

Abstract: A quick setting and release actuator for cooperating with an axially movable chuck for holding a tubular workpiece in fixed position includes an anchor member (12) that is mounted in fixed relationship relative to a housing of a machine tool (20) and a thrust member (42) carried by a pivotally mounted carrier member (38) that pivots towards and away from the anchor member to drive the thrust member (42) into engagement with the end wall (44) of a multi-segment collet (26) to cause the collet to ride along its segment bearing surfaces (30) in a radial direction to engage the periphery of a workpiece (24) to be retained in the machine tool (20). Thrust member (42) may be pivotally mounted by a pivot connection (48) on the carrier (38) so that the thrust member will align itself with the end wall (44) of collet (26) even when the carrier is not precisely parallel with the collet end wall.

Abstract: A saw setter having a base, a pair of clamping members mounted on the base for receiving a saw blade therebetween with the saw teeth pointing upwardly, an advancing lever and pawl for engaging selected teeth and moving the saw blade through the clamping members, a first jaw pivotally mounted on the base, an actuating lever pivotally mounted on the base and connected to the first jaw by a force magnifying linkage, a second jaw pivotally mounted on the base, a linkage between the first and second jaws for causing them to either move simultaneously toward each other or away from each other and a first saw setting finger on the first movable jaw and a second saw setting finger on the second movable jaw.

Abstract: A workpiece indexing and clamping system for machining the workpiece. Spherical or narrow cylindrical heads of index pins extend from holes in a base plate into workpiece holes to align and index the workpiece. The pin portions in the base plate holes can be expanded to lock them to the base plate. Each pin has relief flats parallel to the pin axis. Clamps engage workpiece edges with thread-like angled grooves on a cam surface to force workpiece edges against the base plate during machining of the workpiece. A central clamp has a pin extending from the base plate into a workpiece hole. Angled grooves in a cam surface are brought into contact with the hole sides to force the workpiece toward the base plate and hold the central area in place during machining.

Abstract: A new Pin Vise for removably retaining various sizes of pins for grinding to a specified length which allows the user to easily load and unload the pin for increased productivity. The inventive device includes a base member, a support shaft secured to the base member orthogonally, a top member secured to the support shaft opposite of the base member, and a spring loaded pin retaining means slidably secured to the top member which retains the pin against the top member thereby allowing grinding to the specified length.

Abstract: A clamp structure that has a jaw mounted on a shaft with the clamping face of the jaw facing along the direction of the shaft and offset from it applies clamping force to a work piece when a cam that is part of the clamp structure is moved by an actuator from a free position to a clamping position. The cam is connected to the shaft and has a cam surface that applies force to a follower in opposition to a biasing spring when the actuator is so moved, and a mounting device holds the shaft between the follower and the spring.

Abstract: A polishing apparatus has a cloth cartridge detachably mounted on a turntable, an abrasive liquid nozzle for supplying an abrasive liquid onto an abrasive cloth of the cloth cartridge, and a top ring for holding a workpiece against the abrasive cloth. The turntable and the top ring are rotatable relatively to each other while the abrasive liquid is being supplied onto the abrasive cloth from the abrasive liquid nozzle and the workpiece is being held against the abrasive cloth. A cartridge tightener which is angularly movably mounted on the turntable has a tapered surface for engaging an engageable surface of the cloth cartridge in response to angular movement of the cartridge tightener. The tapered surface is included to a plane substantially perpendicular to an axis about which the turntable is rotatable.

Abstract: A clamping mechanism is provided for securing a workpiece proximate a power tool on a work surface of the type having a support surface defined thereon and extending generally orthogonal thereto. The clamping mechanism applies a force to the workpiece to secure the workpiece between the clamping mechanism and the support surface. The force applied to the workpiece has a component directed substantially perpendicular to the support surface, and an additional component which is directed substantially parallel to the support surface in a direction away from the power tool to resist pulling forces which are applied by the power tool to the workpiece. Further, in a preferred embodiment of the invention, the clamping mechanism is oriented proximate a work head of the power tool without entering an effective work area of the power tool.

Abstract: An angle guide device is disclosed which includes a slotted base member pivoted at one end to one end of an angle guide member, an adjustment member pivoted at one end to the angle guide and carrying a slider element at the other end. The slider element is slidable in the slot but may be locked in any adjusted position. Numeric indicia indicate the angle between the base member and angle guide members in each position of the slides along the track. The base member is clamped to a workpiece by dual action clamps separately clamping to the workpiece and to the base member. Extension pieces may be attached to increase the length of the guide member.

Abstract: The tool holder is designed to hold an object rigidly in place, at a strategic location, with the benefits of simplicity of placement and easy removal. There are two basic parts: base assembly and the tool mount assembly that mates with it. A spring loaded, cam activated piston locks the pieces together. A non-locking internal conical taper permits 360 degree rotation. A handle mounted on the side activates the camming mechanism to lock the tool or object rigidly in place, being secured to the tool mounting surface.

Abstract: An improved height adjustment mechanism for a chair seat back is disclosed. The improved height adjustment mechanism includes a U-shaped mounting bracket having a back wall and two side walls. A longitudinal cam having a handle is rotatably mounted in the bracket between the side walls and spaced from the back wall. A seat back support arm is insertable through the bracket between the cam and the bracket back wall. The cam is provided with a plurality of planar faces extending in the longitudinal direction disposed around about a third of the circumference of the cam. The radial length of the line extending perpendicularly from each planar face to the longitudinal axis of the cam increases steadily from one planar face to the next in one direction around the circumference of the cam. This steady increase in distance of the planar faces from the axis of the cam provides a cam action on the seat back support arm when the cam is rotated in one direction with the support arm located between the cam and back wall.

Abstract: A pocket joint cutter system for forming a pocket cut and fastener bore into a workpiece. The pocket cut and fastener bore receives a fastener such as a self-tapping screw which passes through the bore and into a second workpiece for forming a Joint between the two workpieces. The head of the fastener is held within the pocket cut in order to secure the joint. In one preferred form of the present invention, a workpiece system secures the workpiece in a predetermined position and forms the pocket cut and fastener bore into the workpiece. This preferred embodiment further comprises a bench-mounting system coupled to the workpiece system for securing the system to a bench. Using this embodiment of the present invention, the system can be mounted to a bench, and the workpiece can be brought to the system and held in position while the user forms the pocket cut and fastener bore.

Abstract: A carpenter's toe-nail backup clamp for use in positioning a first board, such as a 2.times.4 wall stud, to a second board, such as a 2.times.4 plate, to facilitate attaching the first board to the second board with nails, the backup clamp having a base member to rest on the second board, an end plate affixed to one end of the base member for extending along one edge of the second board, a cam member secured to the base member at the other end thereof about an axis that is parallel to the end plate, the cam member providing variable spacing from the end plate according to the rotational position of the cam member, and a handle extending from the cam member by which the cam member can be rotated to clamp the second board between the cam member and the backup plate, the base member thereby providing a backup for a first board so that the first board may be toe-nailed to the second board.

Abstract: A work holding device is disclosed which has a fixed jaw and a movable jaw mounted on a pair of parallel guide rods for guiding the movable jaw toward and away from the fixed jaw. For moving and actuating the movable jaw, the guide rods are engaged by a handle operated cam member with a self-energizing frictional locking action responsive to handle movement.

Abstract: A bench mounted machine allows an operator to produce both mating components for woodworking through and half-blind dovetails in workpieces suitable for case construction and drawer construction with computer controlled programmable flexibility to determine size and centerline spacing of pins and tails as well as half-pin widths. Symmetrical and asymmetrical through and half-blind dovetail configurations can be created without the use of guide templates or fixed spindle arrangements. Stationary workpieces are mounted vertically and horizontally above an automated two axis dovetail cutting means. Pins and tails for interlocking through and half-blind dovetail joints are milled in the ends of workpiece boards based upon operator input commands from a personal computer control station.

Abstract: A clamping apparatus of construction molding board has a base, a base body, a press bar, and a torsion spring. The base is provided with a through hole. The base body of U-shaped construction is made integrally with the base such that the base body extends upwards from the base. The base body contains a receiving space having a rear portion provided with a canal in communication with the through hole of the base. The press bar has a bottom end provided thereon with a serrated arresting portion. The press bar is mounted pivotally in the receiving space by a shaft pin in such a manner that the arresting portion is opposite in location to the canal. The torsion spring is composed of two ring bodies sharing a common end which forms a pressing portion of an inverted U shape. The two ring bodies are provided respectively with another end which forms a supporting portion.

Abstract: A cycle bracket for transport of a cycle on a vehicle roof is provided with an anchorage strut secured to the vehicle roof and provided with two clamps which are adjustable to one another and which, by means of gripping members manufactured of a semi-rigid material, grasp about a frame tube in the cycle. The form of the gripping members is adjustable to the frame tube. In order to achieve simple and reliable adaptation of the gripping members, these include a jaw which is displaceable in the longitudinal direction of the clamp and which, together with an abutment fixedly disposed at the free end of the clamp, defines an accommodation space variable in both size and shape for the frame tube. Furthermore, the abutment portion is of one-piece manufacture with a flexible form-adapting member which is located between concave surfaces on the jaw and the frame tube.

Abstract: An improved positioning jig which includes two principal relatively flat members adapted for locking and unlocking engagement/disengagement with each other and which are normally urged apart in the unlocked condition by a pair of elongated spring-like members which separate the two principal relatively flat members. Each of the two members includes a mating set of teeth which are adapted for engagement with corresponding teeth on the other member and which permit adjustments in small discrete steps over an extended range. When it is desired to lock the two members together, a bi-directional cam clamp is rotated through about 90 degrees so as to impart a vertical camming force to the upper relatively flat member thereby forcing it downwardly in opposition to the spring bias until teeth of the upper member and those of the lower member are engaged thereby locking the members together in the desired relationship.

Abstract: A brazing fixture apparatus for holding an article to be brazed comprises a frame and a mechanism connected to the frame for holding the article so that the weight of the article causes a force to be transmitted through the mechanism and applied to another portion of the article. The mechanism includes at least one lever pivotally mounted to the frame. The lever includes a graphite member attached to the lever for receiving the article thereon. The frame also includes a spacer bar which is positionable in a pair of spacer bar receiving members attached the frame for adjusting the size of the opening to accommodate different size articles. A method of making the heat exchanger using the fixture is also disclosed.

Abstract: A cam action clamp for use against a fixed clamping surface comprising a threaded shaft extending outwardly from the fixed clamping surface and a movable clamping member having a channel therethrough to allow the clamping member to be mounted on the threaded shaft for slidable movement along the shaft. A thrust plate is affixed to the movable clamping member adjacent the channel. A mounting block is threadably mounted on the threaded shaft and a clamping handle is pivotally mounted to the mounting block. The handle is formed as a cam member that abuts the thrust plate. Pivoting the handle causes the cam member to engage the thrust plate to slidably advance the movable clamping member along the threaded shaft toward the fixed clamping surface in order to clamp an article between the surfaces. The mounting block can be rotated along the threaded shaft to vary the distance between the clamping surfaces.

Abstract: A tool for mounting and leveling forming boards to a vertical wall that has three legs parallel to each other. Two of these legs are separated sufficiently to permit a forming board only between them while the third leg is separated a larger distance and typically the distance between two spaced apart forming boards. A puncturing mechanism is mounted to the outer leg of the pair that accepts the forming board so that it can be releasably held. A leveling device is mounted on a transverse member that connects all three legs.

Abstract: A clamp for connecting a pair of formwork panels which are to be disposed side-by-side in a common plane has two clamping members. Each of the clamping members includes a clamping arm for urging the panels together and an adjusting arm which is approximately perpendicular to the respective clamping arm. The clamping members are pivotally mounted on a U-shaped support and the adjusting arms are disposed internally of the support with their free ends overlapping. The clamping arms project from the support and are located on the same side of the latter as the transverse web bridging the legs of the support. The legs are provided with registering openings which are elongated transversely of the adjusting arms. A pivot extends through the overlapping ends of the adjusting arms and into the openings. The pivot is guided by the openings for movement transversely of the adjusting arms and carries an eccentric disc which is arranged to bear against the transverse web of the support.

Abstract: A car body frame straightening apparatus consisting of a frame jig and a rim clamp having an adjustable attachment to the jig frame and comprising of a pair of jaws clamping to the body rim. One jaw (3) of the rim clamp is permanently fixed to a body piece (5) of the rim clamp (2) while the other, an adjustable clamp (4), is clampable by means of an eccentric clamping member (6) against the other jaw (2) in such a way that the rim clamp is clamped by virtue of an other set of eccentric elements (7, 8), which exert a clamping effect on the jig frame 1, to attach to the beam frame.

Abstract: A rapid acting adjustable clamp includes a precision ground dovetail track which carries a cam actuated locking assembly along a bridge portion of the clamp to provide quick initial setup, secure workpiece retention, quick release, and highly repeatable subsequent re-actuation of the clamp. The resulting positive acting clamp is particularly advantageous for use in precision grinding, milling, and electron discharge machining operations where a number of similar workpieces are to be machined. The dovetail joint provides rapid sliding adjustment along a first workpiece engaging axis while a single threadedly adjustable screw provides rapid setup along an orthogonal workpiece engaging axis. The combination of these quick adjustments with the single lever cam locking actuation greatly reduces the number of repetitive operator manipulations required in its use, resulting in significantly improved clamping action and in increased productivity by its use.

Abstract: A fly tyer's vise which has a pair of spring members at one end so as to receive and clamp a fish hook and which can be separated by a cam operated lever wherein said jaws are mounted on a shaft received in an adaptor such that when the supporting shaft is in the horizontal position, the jaws and fish hook can be rotated 360.degree. about a horizontal axis so as to allow the fly to be adjusted to all angular positions. A set screw passes through the adapter and is received in a groove in the supporting shaft for the fish hook jaws and a generally spherical knob fits over an extending end of the support shaft.

Abstract: A hand-held drill jig is utilized to locate and maintain a central axis through a head and an associated neck of a femur enabling a blind hole to be drilled into the femoral head oriented to the central axis. The drill jig is adjustable to accommodate a broad range of sizes of femurs and can be readily attached to, then removed from, the femur. A positioning mechanism is provided to firmly engage both the outer peripheral surface of the femoral head and the femoral neck. This operation renders associated drill bushing immobile relative to the femur and orients its longitudinal axis with the central axis. A drill bit is then capable of being guided through the drill bushing and into cutting engagement with the femoral head.

Abstract: A wall-mounted support system for a sheet-cutting machine employs a workpiece clamping unit, and a set of rack units to provide endwise support for the workpiece. The clamping unit is comprised of confronting, elongated members of U-shaped cross section, connected by pairs of identical pivot arm components which are, in turn, assembled with pins that provide bearing elements. The rack units incorporate leveling bars, the attitudes of each of which is adjusted by use of an eccentric fixture.

Abstract: This invention is in the nature of a clamp to be used to clamp, for example, parts on a work piece for machining and the like. The clamp has a clamp bar and a handle bar and a roller and cam arrangement so that the clamp bar can be releasably held in an up-lock position by the cam but may be released and then the cam applied to clamp the clamp bar to the work piece.

Abstract: A set of jaw pieces comprising at least two separate jaw pieces for use in a vice arrangement is provided in which the individual jaw pieces can move between a release position in which a work piece may be selectively inserted or removed and an operative position in which the work piece is securely held between at least two of the jaw pieces, each of the jaw pieces is provided with a flange or groove for interlocking with a complementary flange or groove of another jaw piece to facilitate relative movement of the jaw pieces when moving between the release and operative positions and each of the jaw pieces is provided with a relatively involutedly shaped portion such that when a shaped work piece having a similar involutedly shaped profile is placed between the opposing involutedly shaped jaw portions the work piece is securely held in such a manner that it may be machined without substantially damaging or distorting the work piece.

Abstract: An extension table for a machine tool of the type that includes a machine table that defines a reference plane includes a rigid, straight beam having a lower surface. A ledge is mounted to the lower surface of an outer portion of the beam to extend outwardly from at least one side of the beam, and this ledge defines a continuous upper surface which is substantially coplanar with the lower surface of the beam. The inner portion of the beam is mounted on the machine table with the beam positioned above the machine table such that the outer portion of the beam is cantilevered from the machine table with the lower surface of the beam substantially coplanar with the machine table. The outer portion of the beam is then supported against deflection by a support leg. The beam is sufficiently rigid to ensure that the upper surface of the ledge is substantially coplanar with the machine table.

Abstract: A wood working accessory including a vice with a first jaw having an engagement surface for engaging one surface of a fence or the like, a second jaw for engaging an opposite surface of the fence, a yoke joining the first and second jaws and adapted to extend over an edge of the fence extending between the opposite surfaces thereof, and an adjustment mechanism operable to produce relative movement between the first and second jaws in a given direction substantially perpendicular to the engagement surface so as to produce selective forcible engagement of the fence between the first and second jaws.

Abstract: A cam locked stud nailing fixture includes a fixture base formed of a base web with depending side plates and a pair of spaced apart abutment flanges upstanding from the base web and having ends defining an abutment surface. A cylindrical cam is eccentrically mounted on one of the side plates and has a cam lever attached for pivoting the cam member. The other side plate has a plurality of gripping spikes projecting inwardly. The fixture is clamped onto a main framing member, such as a sole plate of a frame, by pivoting the cam into compressive engagement with the main framing member which causes the gripping spikes to extend into the main framing member to prevent slippage of the fixture along the main framing member. A branch framing member, such as a stud board, is positioned with its end against the main framing member and with a face engaging the abutment surface formed by the abutment flanges of the fixture. The fixture forms an anvil to stabilize the position of the stud during nailing.

Abstract: A vertical vise adaptable for floor mounting and having two spaced posts. One post carries a stationary work piece engaging jaw on its upper end and beneath the jaw, a vertically adjustable work piece support cradle assembly. The second post is hollow and shorter than the first post. A clamping head positioning arm is pivotally secured in the cavity of the second post so that its upper end is swingable toward and away from the first post. The second post carries a screw which projects thereinto for forcing the positioning arm toward the first post. The positioning arm projects above the second post and carries a clamping head assembly which includes a movable work piece engaging jaw mounted on a lever which is cam actuated. In use, a work piece is inserted between the posts with its bottom edge resting on the support cradle and its upper edge projecting above the clamping jaws.

Abstract: A target system for use in infrared firing exercises comprises a plurality of targets each of a wooden carrier material formed as a plate of a uniform thickness which is covered with a relatively thin metallic layer as an electrically conductive resistance material; a clamping device having two mutually adjustable clamping jaws for interchangeably holding these targets one at a time; and a source of current for electrically heating the metallic layer of each target when clamped at an edge portion between the two clamping jaws of the clamping device, whereby the current is provided with a downwardly transformed voltage for supplying a corresponding upwardly transformed heating current to the metallic layer.

Abstract: An adjustable workpiece securing device is disclosed for securing a workpiece to a support while performing one or more machining operations thereon. The device incorporates a cam assembly for application of a force to the displaceable end of a substantially immovable bar to secure the workpiece to its underlying support. The construction of the device to include non-movable elements in those portions which effect the securing of the workpiece, results in the precision alignment of the workpiece with respect to a machine cutting element that can be effectively maintained during the machining operation.

Abstract: A building truss fabrication apparatus in which a plurality of press head assemblies are supported by an overhead gantry support so that the various press assemblies are movable in an x-y coordinate space. A movable jig table is arranged to move between an assembly position and a pressing position within the apparatus. The movement of the jig table is hydraulically powered as are the press head assemblies. The entire apparatus is operable by a single hydraulic power source. A standard air compressor is used to generate air pressure of pneumatic clamps used on the jig table. The pneumatic clamps are part of the jig fixtures which hold lumber components into a truss preformed shape. Connector plates or nail plates are pressed into the component ends by the press head assemblies in order to complete fabrication of the building truss.