Abstract: Apparatus and methods for attaching cable to a surface and for thus installing the cable. Apparatus includes driving guns improved for driving fasteners through clips, and guns having the capability to selectively prevent the advance of the magazine contents, such that the gun plunger may strike a fastener more than once. Apparatus also includes driving guns having modified magazines for receiving clips and improved clips which may be loaded into the modified magazines of the guns. The clips have retainer means thereon functional for assembling the clips into a strip by engagement of the retainer means on surfaces of adjacent clips. The clips may be used with staples or nails as fasteners. The driving surface of the gun may be modified for accommodation of the combination design of clip and fastener.

Abstract: The invention provides a multi-purpose safety device which can be used in conventional nailing operations to guide the nail to be driven safely, conveniently and quickly at a desired angle and which can be used for measuring angles and inclinations as well as levelling. The invention includes a driving member disposed in a sleeve which in turn mounted on an upper side of a housing, a nail advancing plate at one side of the housing for advancing nails, and a nail guiding body below the sleeve for guiding and positioning a nail beneath the driving member whereby the nail can be driven into an object by the driving member. An angle meter is further mounted in the housing for measuring angles as well as indicating a desired angle by which the nail has to be driven.

Abstract: A system for fastening cable to a support system using an insulated, protective housing that has surface penetrating fastening devices mounted thereon in such a manner so as to allow a multiplicity of housings to be positioned, discharged and applied in a uniform automated process. The applicator has a base plate with a slot that cooperates to position the housings slightly above the support surface with a portion of the cable passing through the slot.

Abstract: Interlocking means are provided on the front and rear surfaces of adjacent clips to restrain relative movement between adjacent clips in one direction and to permit relative guided movement between adjacent clips in another direction and wherein the restraint of the relative movement is maintained for at least a substantial portion of the movement of the one of the adjacent clips toward a secured position on the support surface. Also, each clip has at least one bore means having first and second cross-sectional configurations so as to provide a shoulder and a surface penetrating fastening device having an enlarged head portion located in the bore means so that, when a force is applied to the surface penetrating fastening device to drive the surface penetrating fastening device into the support surface, the enlarged head will contact the shoulder so that the clip is firmly held in position on the support surface.

Abstract: A tool for driving gutter nails through the ends of gutter brackets to secure a gutter to a gutter board includes a nail guide which engages a bracket of the gutter and holds a gutter nail and a nail driver which when struck with a hammer delivers the impact to the nail and drives it from the guide. When engaged with the bracket, the nail guide aligns the nail with holes in the end of the bracket, so that the driven nail passes through the end of the bracket and into the gutter board.

Abstract: A fastener driving tool is provided which employs a drive housing subassembly, preferably in the form of opposed cast metal housing sections, which encloses the flywheel and suitable bearings for rotating the same at high speed. This subassembly also supports the associated idler wheel positioned on the other side of the fastener driving ram from the flywheel and mounts a toggle mechanism for adjusting the idler wheel from an inoperative position, in which the idler is spaced a substantial distance away from the ram, to an operative position close to the ram in response to movement of the tool into engagement with a workpiece. The drive housing subassembly also provides a top opening recess or well which is adapted to receive and position a removable cartridge which includes the ram and an elastic cord return mechanism, this subassembly also defining a vertically extending slot communicating with said recess which is adapted to receive the vertically positioned ram between the opposed flywheel and idler.

Abstract: A fastener driving tool comprising a spring activated hammer, wherein the hammer is manually cocked. A foot actuated cocking mechanism is disclosed for cocking the hammer.

Abstract: A hand-held manually-operable tool is disclosed for installing a two-piece expandable plastic fastener (including an expandable body and an insertable pin) in a panel hole. The tool comprises a hand-held housing having a hollow barrel from which a spring-biased hollow plastic sleeve projects. A pushrod within the hollow sleeve is movable with the housing. The sleeve tip releasably engages and supports either the body or pin of a fastener manually mounted thereon and aligns the pin with the pushrod which subsequently forces the pin into the body to effect expansion. The sleeve tip end has either resiliently flexible legs to engage the body or resiliently flexible compressible foam rubber strips to engage the pin. In use, the tool directs the body into the panel hole and is pressed to cause the sleeve to retract so that the pushrod can force the pin into the body to effect body expansion.

Abstract: A foot-operated machine for implanting fastener elements in the ground through an erosion cover on the ground. The machine has a hollow vertical column slidably receiving a vertically reciprocable driver connected to a foot pedal on the outside of the column. A post extends up from the column and carries a top cross piece with hand grips which a person may grasp while standing substantially erect with one foot on the foot pedal. A magazine assembly feeds fastener elements individually in succession into the column to be forced down into the ground when the driver is moved down by pushing the foot pedal down. The magazine assembly has a magazine housing located on the opposite side of the column from the foot pedal, a magazine removably received in the magazine housing and slidably supporting a continuous series of the fastener elements, and a spring-biased follower which urges the fastener elements toward the column.

Abstract: A novel apparatus is provided for riveting belt fasteners to belts wherein a plurality of rivet assemblies are driven simultaneously while aligned and guided by elongated bores of a guide block assembly. An impact distributing driver is employed to transmit impact force from a single hammer simultaneously to a plurality of rivet assemblies held in a guide block above a belt fastener. In the preferred embodiment, all of the rivet assemblies for a particular belt fastener may be driven simultaneously. The preferred driver comprises a metal cap with a plurality of elongated metal drive rods extending downwardly therefrom to be received within the bores of the guide block assembly. The drive rods are cushioned against fracturing at their upper connections to the cap by an elastomeric cushioning material, which is preferably a polymeric plug secured in a recess in the cap.

Abstract: A nail guiding and driving tool having a punch slidably disposed within a hollow sleeve. The punch includes a hammer blow receiving body portion containing a pair of relatively large diameter spaced apart end sections which closely fit but slide freely within a large diameter rear end portion of the hollow sleeve joined together by a relatively small diameter mid-section The punch also includes a nail driving portion which closely fits but slides freely within a small diameter forward end portion of the sleeve.

Abstract: A framer's tool consists of a handle member on which is provided an anvil portion for abutment with the outside surface of a picture frame. An actuating rod extends forwardly from the handle member, and is attached to an operating trigger pivotably mounted therewithin. A driving jaw adjustably mounted on the forward portion of the actuating rod, and has a magnetic component on its lower end for setting framer's points, brads and the like, positioning them with a rearward orientation to be squeezed by the tool into the inner surface of the frame component. The anvil portion on the handle member may have a pair of spaced resilient pads mounted upon it, which cooperate with a rib on the confronting surface of the jaw to bend, and thereby fracture, a prescored piece of glass squeezed therebetween.

Abstract: A precision guided hammer or impact device includes a guide track on which is reciprocally mounted an impact member for movement between an impact position at one end of the guide member and a retracted position, and further includes a reciprocating manual input member which is connected by a multiplication linkage to the impact member for multiplying the input velocity for driving the impact member at a high velocity relative to the input velocity.

Abstract: A device for driving nails, staples and similar fastening elements includes an electromotor for rotating a driving member. The rotation of the driving member is transferred to a driven member which, in turn, converts the rotational movement into translational movement. The rotational movement from the driving member to the driven member is effected for a limited time period by a clutch so that a drive stroke and a return stroke are carried out. A releasing device actuates the clutch.

Abstract: An anchor bolt installation tool for installing anchor bolts in preformed holes in concrete, masonry and other materials. The anchor bolt installation tool includes a body piece adapted to interengage with a power impact hammer at one end. The exterior of the body piece is preferably threaded to adjustably receive a guide piece thereon. The body piece is further provided with a bolt receptacle for receiving the threaded end of an anchor bolt. The guide piece is adjusted relative to the body piece so that the guide piece contacts the surface of the concrete or other structure thereby determining the depth to which the anchor bolt is driven. Locking means are preferably provided to fix the relative position between the guide piece and body piece to maintain the depth adjustment at a fixed position. A plurality of inserts can also be provided so that various sizes and types of anchor bolts can be used.

Abstract: Various sheet-like materials require fastening to the ground. Included in such materials is a blanket comprised of netting and excelsior. A device for driving U-shaped anchors downwardly so as to secure the blanket to the ground at selected locations comprises a shoe having a sole plate that is adapted to engage the netting or other upper surface of whatever sheet-like material is to be anchored. The sole plate has a transverse slot through which a plunger is moved downwardly when a U-shaped anchor has been advanced into alignment beneath the plunger. The plunger is carried at the lower end of a reciprocable piston rod which has a piston at its upper end. By means of a foot-operable valve, compressed air is introduced into the upper end of the cylinder, thereby forcing the piston, the piston rod and the plunger downwardly so as to force an anchor into the ground. The downward movement of the plunger is limited by means of a stop that is struck by a collar attached to the lower end of the piston rod.

Abstract: A tool for driving fasteners by means of multiple impact blows. The tool comprises a body with a handle portion and a magazine portion, shiftable in directions parallel to said blows between an extended position substantially outside the body and a retracted position substantially within the body. A prime mover provides a rotating shaft. The rotating shaft is operatively connected to a mechanism for translating rotary motion into reciprocating motion. The translating mechanism comprises a flywheel, an impact member having at least one impacting surface thereon and being attached to or constituting an integral, one-piece part of the flywheel, a free floating energy transfer member separate from but engageable with the impact member, a resilient bumper to arrest the energy transfer member at the termination of its drive cycle, and a fastener driver engageable by or comprising an integral, one-piece part of the energy transfer member.

Abstract: A device for driving fastening elements, such as nails, staples and the like, includes a magazine extending transversely from a driving unit. A follower is located within the magazine for supplying fastening elements to the driving unit. For filling the magazine with fastening elements, the follower can be secured in a loading position. The follower is secured by a stop pivotally attached to the follower which engages an abutment on the magazine. The follower is released from the loading position by an actuating member movably mounted on the magazine so that it can contact an engagement part on the follower and pivot the stop out of engagement with the abutment.

Abstract: A manually operated nailing machine having nail guide and positioning means for positively and unerringly maintaining a nail to be driven into a workpiece in proper alignment with the nail driving means of the machine and a workpiece. The nail guide and positioning means is interchangeable enabling the machine to be used with nails of different lengths.

Abstract: A novel apparatus is provided for riveting belt fasteners to belts wherein a plurality of rivet assemblies are driven simultaneously while aligned and guided by elongated bores of a guide block assembly. An impact distributing driver is employed to transmit impact force from a single hammer simultaneously to a plurality of rivet assemblies held in a guide block above a belt fastener. In the preferred embodiment, all of the rivet assemblies for a particular belt fastener may be driven simultaneously. The preferred driver comprises a metal cap with a plurality of elongated metal drive rods extending downwardly therefrom to be received within the bores of the guide block assembly. The drive rods are cushioned against fracturing at their upper connections to the cap by an elastomeric cushioning material, which is preferably a polymeric plug secured in a recess in the cap.

Abstract: A sheetrock hammer attachment used in conjunction with a pneumatic hammer operator having a rear body portion and a forward body portion, the forward body portion comprising a threaded bore having its forward end surrounded by a smooth outer sleeve and the rear body portion having an operating switch which activates the vibrating action of the hammer; comprising a hardened steel hammer having a rounded forward head and an elongated shaft extending rearwardly therefrom, the elongated shaft being received in the bore and being operationally connected thereto, a central portion of the head is drilled away to receive a non-magnetic insert containing a smaller cylindrical magnet, the magnet being provided to hold the head of a nail, a plexiglass shield covering the front end of said sleeve and extending forwardly therefrom, a tension spring rotatably affixed to the rear portion of the shield and being wound about the rear portion of the sleeve, and a rotatable nut threadedly connected to the bore adjacent the rear

Abstract: A driving tool for an elongated fastener of ferro-magnetic material, including an elongated hollow tubular body reciprocably receiving a driving rod having an impact end and a drive end. The drive end is characterized by an internal cavity receiving an Indalloy permanent magnet, the open end of the cavity being closed by a magnetic head, or pole piece, in such a manner that the axial impact forces imparted to the drive rod are transmitted substantially entirely to the magnetic head and not through the magnet. The Indalloy magnet is utilized within the drive end of the drive rod so that its magnetism will be retained, even if fragmented.

Abstract: The present invention is a double-headed hammer slidingly encompassing a ground rod driving shaft having a single anvil affixed thereto which can be selectively engaged by either hammer. The driving shaft has a recess in each end to receive the grounding rod, depending upon whether the action is to initiate and continue the insertion of grounding rod into the ground or to complete the insertion of the rod in accordance with the provisions of the Code. The present invention does not require the operator to take a position above the ground or to use any other instrument to make the complete and proper insertion of the grounding rod into the ground.

Abstract: The present disclosure is directed to a nail driving apparatus having a percussive air hammer driving a chisel. The apparatus has a base member, having guide means upstanding from each side of the base member. A cradle means is movable along the guide means and means carried by the cradle means is adapted to mount the air hammer securely to said cradle means. A nail barrel means is carried by the base member into which both nails to be driven and the chisel of the air hammer is positioned on the base member to be received and one of the guide means upstanding from the base member forms a nail chute having means for delivering nails singly to the barrel means beneath the chisel when the air hammer and cradle is raised.

Abstract: This apparatus for fixing a row of assembling U-shaped fasteners to the end edge of a conveyor belt or the like by means of a pair of likewise U-shaped staples for each fastener, the staples having pointed ends adapted to pass through the fastener arms and the belt end edge disposed between these arms, comprises a fixed anvil underlying a vertically movable cover having a row of apertures corresponding in number to the fastener and matching the configuration of the staple pair, means for lowering the cover and cause the staple points to emerge partially from the fastener and penetrate slightly into the belt material, and a punch for driving the staple ends to a first partially bent condition obtained by the engagement of these points into skew-bottomed grooves formed in the anvil, whereafter the cover is raised and a hinged plate is tilted to its operative position in which it covers the anvil grooves, and finally the cover is lowered again towards the anvil in order to cause the staple points to be bent unti

Abstract: The tool for fastening an elongated object (41) is of the tacker type and has a magazine (11). The magazine is designed for cooperation with a strip of U-shaped clips (17), each of which has its U-legs located one after the other, as counted in the longitudinal direction of the magazine. The clips are fed one by one up to a mounting station at the front end of the tool. At this station they are arrested by an abutment member (9, 37) in a well-defined, freely projecting position for mounting over the elongated object oriented transversely of the longitudinal direction of the magazine, by driving the fastening member (19) of the clips into the supporting surface with the aid of the driving element (3) of the tool. When driving the fastening element into the surface, the clip (17') located at the mounting station will be separated from the immediately succeeding clip (17).

Abstract: An air-drive impact hammer is used to drive nails in locations where it is not possible to hold them in position with one hand and, using an ordinary hammer, drive them home using the other hand. A driver assembly has a driver shaft supported in the impact hammer, the front end surface of this shaft being a nail driving surface situated in perpendicular relationship to the longitudinal axis of the driver shaft. An intermediate ball keeper sleeve is concentrically and slidably mounted around the driver shaft, and an outer sleeve is concentrically and slidably mounted around the ball keeper sleeve. Four detaining ball receiving openings extend radially through the ball keeper sleeve on radial axes while lying in a common plane perpendicular to the longitudinal axis of the driver shaft. Nail head detaining balls are situated in each of the ball receiving openings.

Abstract: Device in a mechanical nailing apparatus including a nail holder to support and guide a nail into position for nailing by means of a nail driver. The device is especially designed for nails (51) which, after being nailed, has at least one laterally expanded anchoring portion (52). The inner cavity of the nail holder (55, 56) intended to receive the nail defines, along part of the nail (51), a guide seat (53) of non-circular section adapted to co-operate complementarily with a guide portion (52) on the nail (51) such that the nail, as it is carried into position for nailing, is given a definitely fixed angle of orientation about its longitudinal axis relative to the nail holder. By positioning of the nail holder, i.e. the nailing apparatus, into a suitable angle for anisotropic materials, e.g. the fibre direction in wood, an expansion nail may be nailed in the angular position where the nail will reach maximum gripping power.

Abstract: A wire setting tool for driving wire segments into hard or frozen surfaces. A vise assembly is slidably located in the bore of a hollow, elongated holder having a stabilizing handle rigidly but removably attached to one end at right angles to the bore. The jaws of the vise are operable by means of a screw threaded operating handle. A slot extending for a substantial distance along the longest dimension of the frame holder permits the vise operating handle to protrude from the holder. A second slot which extends the entire length of the longest dimension of the holder located approximately ninety degrees along the surface of the holder away from the operating handle slot and which is substantially parallel to this slot permits insertion of the wire segment into the vise jaws which are exposed by this longer slot.

Abstract: An improved nailing tool for supporting and driving a nail in which an elongated tubular guide sleeve member has means at one end for releasably retaining a nail to be driven and a hand grip at the opposite end. The nail driving rod is axially slidable in an elongated tubular guide sleeve member in which the lower end engages the nail retaining means and the upper end extends beyond the hand grip with the nail retaining means having an anvil in which there is an axial bore for cooperatively receiving a nail head therein with the anvil having a substantially planar driving rod impact surface on the face of the anvil opposite from the bore. Means are included in the axial bore for releasably engaging a nail head upon axial displacement of the nail driving rod in the guide sleeve member.

Abstract: A nail driving tool includes a plunger rod attached to one end of a cylindrical handle including a radially extending finger guard located at the end of the handle nearer the plunger rod. A guide tube fits slidably on the plunger rod and has a flange extending radially from one end. When the flanged end of the guide tube is adjacent to the handle the plunger rod can be pushed through the guide tube until the driving face of its tip is approximately even with the opposite end of the guide tube. When the plunger rod is inserted into the guide tube with the flanged end away from the handle, the tube end fits to a predetermined depth into a cavity in the handle, exposing the tip of the plunger rod to that extent beyond the flange, for countersinking nails to the predetermined depth.

Abstract: A rivet driver for easily fastening a rivet comprising a male shank and a female tube to separate members has a construction such that the separate members may be united by hydraulically driving the male shank into the female tube to thereby cause the female tube to be radially expanded outwardly and that upon completion of this hydraulic driving, it feeds a subsequent rivet to the supply position and is ready for next driving of the male shank into the female tube of the subsequent rivet.

Abstract: A fastener driving tool of unitary construction. The tool is characterized by a tubular grip having a fastener driving ram slidably disposed in the tube and a frictional element which maintains frictional engagement between the grip and the ram. The frictional element serves to prevent the ram from rebounding out of contact with the fastener after a blow is struck. The blow receiving end of the ram is of greater diameter than the inside diameter of the grip and comes in contact with the grip when the fastener driving end of the ram has reached the opposite end of the grip. This arrangement permits the user to determine the length of travel remaining before the fastener will be fully driven. The unitary construction of the driver is achieved by forming a detent in the grip after the grip, the ram, and the frictional element are assembled.

Abstract: A nail driving and recessing tool for use with percussive equipment in which the nail driving end of an elongated shaft, the opposite end of which is coupled to the percussive equipment, has an elongated sleeve yieldably carried there around and capable of limited axial movement with respect to the shaft. Suitable stops are provided on the shaft and sleeve so that the shaft can continue to drive the nail below the surface of a work piece for a predetermined limited distance to recess the nail head below the surface.

Abstract: A compensating nail chuck includes a driving rod (12) having a yieldable force-transmitting member (34) comprised of a belleville-washer spring system which compresses in size in response to a back force on the driving rod created by driving a nail. A main housing (10) of the chuck has freedom of vertical movement on a chuck bar (26) for a distance equal to a tolerance difference to be compensated for.

Abstract: A nail driving tool allowing continual visual observation of nail by the user while the nail is being driven. The tool includes a driver member for transferring a hammer impact force to a nail head, a guide member having a transparent driving end, and a frictional element, mounted to the guide member, frictionally engaging the driver.

Abstract: My invention is directed to portable pneumatic nail driving devices for working with large nails ranging in size from 30 to 90 penny which are fed from a primary chute through a transfer chute to a nail driving barrel carried by a base frame. Upstanding from the base are guides over which slides a cradle to which a pneumatic gun having a chisel is carried to that the chisel enters the barrel after a nail has been introduced to drive the nail. Such apparatus is used in the construction of board roads in swamps incident to oil field work.

Abstract: A generally conventional hammer construction is provided including a nail containing and feeding magazine supported therefrom and extending through the head of the hammer and the adjacent handle portion thereof along a substantially straight path disposed in a plane which contains not only the handle of the hammer but also the transverse head thereof. One end of the magazine exits through the side of the head of the hammer remote from the handle and the other end of the magazine is inclined generally 45.degree. relative to the handle and is spaced outwardly of the side of the hammer handle remote from the nail driving face of the hammerhead.

Abstract: A stapling device developed for orthopaedic use is in two cooperable parts including: a locator (10) in the form of a generally tubular member having a pair of opposed parallel grooves (16) extending longitudinally over one end portion of the inner surface of the member to receive the legs of a staple (30) of appropriate size entered head first into the one end, and having pin or other penetrating means (17) projecting from the one end of the member for a short length compared to the grooves to be entered into bone or other material to stabilize the locator in a desired position relative thereto; and a punch (20) longer than the locator and slidable therein over substantially the whole locator length from its other end to drive a staple therefrom. The one end portion of the locator preferably has its interior narrowed to a slot form (14) with the grooves at the slot ends, and its exterior tapered or otherwise similarly shaped with pins at each end adjacent the grooves, to facilitate staple location.

Abstract: The disclosure is concerned with a nail holding and directing device comprising a handle and an elongated member connected to the handle and having a longitudinally extending bore into which an end portion of the nail may be coaxially inserted at one end of the member. A striker rod is slidably mounted in the bore for reciprocating movement therein; the rod has an outer end extending beyond the other end of the member and an inner end adapted to abut against the end portion of the nail. Gripping fingers are mounted at the aforesaid one end of the member and are operable selectively between open and closed positions so as to respectively release and slidably hold the nail between its ends while guiding same when a striking force is applied to the outer end of the striker rod for forcing the nail out of the bore and into a structure.

Abstract: Apparatus and method for driving an object such as a nail covered by a deformable member such as a shingle without damage to the latter. Force is applied by means such as a hammer to a force distributing member in engagement with the deformable member. A force receiving member is positioned opposite the force distributing member and the deformable member is positioned between the force distributing and force receiving members. The force is received from the deformable member by the force receiving member and applied to the object to drive it.

Abstract: A manual tool suitable for driving nails into concrete or the like comprises an axially extended tube and a ram mounted for reciprocal movement therein, the ram having a handle at one end thereof. The diameter of the ram along its length is substantially less than that of the bore of the tube. The end of the ram remote from the handle is provided with a low friction means to space the ram from the walls of the tube. Typically the low friction spacing means comprises a plurality of ball bearings located respectively in a plurality of recesses formed in the radial surface of the ram.

Abstract: A glazier's punch having an inverted T-shape and a generally flat slightly longitudinally concave face, the punch being adapted for easy holding and for good contact with thin fasteners such as a glazier's point or small brad.

Abstract: A device for forcing railroad car deck planks downward against a support and sidewards against a stop to aid in tying the plank to the support with a clip-like tie member. The device includes an anchor member for being fixedly attached to the support, a body member attached to and extending upward from the anchor member, an engagement member for engaging a portion of the plank, and a jack member for selectively causing the engagement member to force the plank downwards and sidewards relative to the body member.

Abstract: A rod driver includes an elongate body having a longitudinal bore defined therethrough. A driver head has a curved cutout portion defined therein to cover the bore so the bore has a concave blind end. A rod aft end is impacted by the surface defining the cutout so that any deformation of the rod does not inhibit operation of the rod driver.

Abstract: The invention relates to an axial impact tool for driving nails or staples into normally inaccessible places. The tool consists of a guide tube and impact rod slidable inside of said guide tube and containing a heavy handle extending outside of one end of said tube and a magnetic fitting which fits onto the guide rod for grasping and driving a ferromagnetic fastening means such as a nail or staple into position. Additionally, the invention contemplates the use of spacer elements which fit between the guide rod and the handle so as to prevent the guide rod from making a full stroke leaving a portion of the nail or staple exposed. This is for purposes such as hanging pictures, or for temporarily placing a board or panel into position so that it can be easily removed later.

Abstract: An impact member for driven flywheel impact devices, such as nailers and staplers, is disclosed which may be configured to tailor the normal force as a function of ram position. A basic configuration is a constant taper, which, as soon as the impact member is actuated by a flywheel, assists in maintaining driving friction on the impact member. The taper may be linear, stepped or curved, and symmetric or asymmetric about the longitudinal axis of the ram, whereby to tailor the impact member speed for different purposes.

Abstract: Disclosed herein is a consecutive nailing machine with specially joined nails manufactured in rows. The machine is capable of hammering the joined nails one by one, separatively and consecutively, into wood.

Abstract: An air supply means includes a frame providing a valve seat and defining a valve opening. A valve body is adjustably connected to the frame. A plurality of V-shaped fasteners are used to secure the frame in an air duct. Each fastener has a pair of angularly disposed legs receivable in a slot in the opposed top and bottom walls of the frame, the legs meeting at an apex which is positioned toward the entrance to the duct. To attach the frame to the duct, a punch-like member is used to strike the apex of the fastener to spread the legs thereof and drive them through the slots in the opposing walls of the frame and thence, into the walls of the duct.

Abstract: A nailing tool and method for driving nails into structures in an environment in which limited space in line with and behind the nail prevents contacting the nail with a hammer. The tool comprises a metal bar having two mutually perpendicular slots extending axially of the bar from one end such that one of the slots extends transversely of the bar in a spaced relationship to a striking surface comprising one sidewall surface of the bar and the other slot extends perpendicularly from the one slot to a sidewall of the bar that is opposite the striking surface. A nail is supported in the tool with the head in the one slot and the shank supported in the other slot to extend forwardly of the tool perpendicular to its axis.