US2673979A

US2673979A - Nailmaking machine

Info

Publication number: US2673979A
Application number: US236301A
Authority: US
Inventors: Jose M Bolafio
Original assignee: Individual
Current assignee: Individual
Priority date: 1948-08-06
Filing date: 1951-07-12
Publication date: 1954-04-06
Anticipated expiration: 1971-04-06
Also published as: CH280586A; FR970683A; GB653976A; US2712131A

Description

10 Sheets-Sheet l Filed July 12. 1951 ATTURNEY April 6, 1954 J. M. BoLAo 2,673,979 NAILMAKING MACHINE Filed July 12, 1951 l0 Sheets-Sheet 2 gj 115 H6 170 772 INVENTDR April 6, 1954 J. M. aoLAo NAILMAKING MACHINE 10 Sheets-Sheet 3 |NVENTDR l m y, llrf w. .w ma, @w

ATmRNEY,

April e, 1954 11150111190 2,673,979 NAILMAKING MACHINE Filed July 12, 1951 l0 Sheets-Sheet 4 i INVENTCIR, [um /laba 4W/L Affi ATTORNEY April 6, 1954 l 1. M. BOLAO NAILMAKING MACHINE Filed July l2, 1951 10 Sheets-Sheet 5 ATTORNEY April 6, 1954 J. M. BOLAQ 2,673,979

NAILMAKING MACHINE Filed July 12, 1951 10 Sheets-Sheet 7 149" d 1&4 14/ '55 if fa] I INVENTUR f2@ Je; QW mw l April 6, 1954 1 M, BQLAO 2,673,979

NAILMAKING MACHINE Filed July 12, 1951 l0 Sheets-Sheet 8 /a /f ffy 45 i I/ rTn l ya j; f www 2 l l W4? 10?/ 52 se@ Lf@ J/ 5 N95/ 52d 5/ id! .i o 5/ f jaa jf /f .5.9 J1 355 fee Y 9 90 i? 7V gj V/ m fafa %//ai M fing #a 40 .95 )y /J/ff d y, f// /J/J" L JM f90 )aff Mj/5.a 2,0 j@

INVENTDR/ AWUHNIE'Y J. M. BOLAO NAILMAKING MACHINE April 6, 1954 -Filed. July 12, 1951 l0 Sheets-Sheet 9 ATTE! RN EY INVENTDR April 6, 1954 J.M.BOLAO NAILMAKING MACHINE Filed July 12, 1951 l0 Sheets-Sheet l0 i 1x32 44 j@ i R-ns r W @L LNVENTR/ AEN /Z 521% ATTCIRNEY Patented Apr. 6, 7,1954

UNiTEo STATES OFFICE 26, 1948. This No. 236,301

Claims.

The present invention relates to nail making machines and is a continuation of my copending U. S. -patent application Ser. No. 40,735 filed July 26, 1948.

More specifically, the present invention relates to a nailmaking machine of the type which forms nails from sheet metal blanks, which shall furthermore be adapted during the same working cycle to drive the nails fabricated thereby into a workpiece, the double function being performed once for every full cycle of operation of the main working parts.

A number of nailing machines are known having various operating systems, in all of which, however, nails made'outside the machine have to be fed thereto.

According to the present invention, the nailmaking and naildriving operations can both be performed by the one machine, due to the use of sheet metal blanks, which require only forming or pressing in order to produce nished nails, and, by reason of the fact that they are blanks, that is to say, small, flat metal plates, may be conveniently and compactly stored in the-machine itself.

The advantages of the machine of the present invention may be compared tov those of a stapling machine of the so-called sewing type, in which the staples are formed and applied, as and when required, from wire fed to the forming and sta- .o

pling means from a supply coil.

It is, therefore, a principal object of the present invention to provide a nailmaking machine adapted to drive into a workpiece the nails made thereby.

A further object is to provide a machine of the type described including a reciprocating hammer member and a reciprocating slide structure comprising a plurality of cam actuated blank feeding and nail forming members.

A further object is to provide a nail making machine of the type described including a reciprocable slide structure comprising a magazine for nail blanks and a toggle actuated nail-forming ram means cooperating with a nail-forming groove and a relatively stationary head forming member to completely form a nail from a nail blank in one operation.

- These and other objects and advantages of the present invention will b-ecome apparent in the course of the following detailed description of certain preferred embodiments thereof illustrat'ed in the accompanying drawings, in which:

yFigzjl is a general perspective view, of one embodiment of a combined nailmaking and nailing application July 12,

1951, Serial machine of the present invention with certain parts broken away to show internal construction.

Fig. 2 is a perspective View of an end cover plate for a crosshead chamber forming part of the machine.

Fig. 3 is a perspective View of a slide structure and guide block in assembled relationship with certain parts broken away and showing the working parts in their lowermost position.

Fig. 4 is a perspective view of a cam groove member showing the inside face thereof, said cam groove member forming part of the guide block shown in Fig. 3 and being adapted to govern the operation of a nail-forming member.

Fig. 5 is a perspective view of a second cam groove member showing the inside face thereof, said second cam groove member also forming part of the guide block of Fig. 3 and being adapted to govern the operation of a head forming instrumentality mounted in said guide block.

Fig. 6 is a perspective view of the slide and guide assembly showing the rear face of the guide block with certain parts broken away to illustrate the cam for actuating the feed bar to place a blank in position to be formed into a nail.

Fig. '7 is a perspective view of a portion of the reciprocating slide structure with certain parts broken away.

Fig. 8 is a side elevation of a detachable accessory part of the reciprocable slide structure illustrating the guide construction for the heading member shown in Fig. 10.

Fig. 9 is an end view of the member shown in Figure 8.

Fig. 10 is a perspective view of a heading member.

Fig. 11 is a perspective view of a guide plate to be mounted in the slide structure for guiding the heading member, as shown in Fig. 18.

Fig. 12 is a perspective view of a stop plate to be mounted in the slide structure for limiting the inward stroke of the heading member, as shown in Fig. 18.

Fig. 13 is a perspective view of a feeder block which is also an accessory part of the reciprocable slide structure.

Figs. 14 and 15 are elevations of opposite sides of the feeder block of Figure 13.

Fig. 16 is a perspective view of the assembled reciprocable slide structure.

Fig. 17 is a cross-section of the guide block and slide structure in assembled relationship the plane of section'being indicated at XVII-XVII in Figure 16, and being taken parallel to the bottom face of the reciprocable slide structure.

Fig. 18 is a cross-section similar to that of Fig. 17 but with reference to the plane XVIII-XVIII of Figure 16, also taken parallel to the bottom face of the reciprocable slide structure.

Fig. 19 is a side view of a hammer bar forming part of the machine.

Fig. 20 is an edge-on view of the hammer bar of Figure 19.

Fig. 21 is a front elevation of the cross-head chamber, reciprocable slide member and guide block assembly with certain parts broken away, the working parts being shown in their lowermost position.

Fig. 22 is a fragmentary View showing the guide block in section and the reciprocable ture partly in section, the working parts being illustrated in their uppermost position, the view being otherwise similar to the lower portion of Figure 21.

Fig. 23 is a section on the line XXIII-XXIII of Figure 21.

Fig. 24 is a fragmentary sectional view similar to the lower portion of Figure 23 but with the working parts shown somewhat raised from their lowermost position.

Fig. 25 is a section similar to Figure 23 but with the working parts shown in their uppermost position.

Fig. 26 is an elevation of a nail blank for use in my novel machine, and

Figs. 27 and 28 are perspective views of a partly formed nail and a fully formed headed nail respectively.

As shown in Figure l, the machine of the present invention comprises a pedestal I, including an upper housing 2, in which the

shafts

5 and 9 forming part of the actuating means for the machine are enclosed, and a table 3, adjustable as to height, as by means of hand-wheel 4 and adapted to support the work-pieces to be nailed together (not shown).

As will readily be appreciated in the course of the following description, the precise form and construction of the pedestal I and the manner of mounting the actuating shafts and the actuated instrumentalities thereon is of little importance as regards the present invention and the pedestal and method of mounting illustrated and described are merely illustrative.

' The actuating means comprises a main shaft 5 adapted to be powered as by means of a pulley 6, intended to be driven in the usual way by belting (not shown) from a suitable source of power, said main shaft 5 being positively coupled as by gears 1 and 8 to a counter-shaft 9.

The end of the shaft 5 remote from the pulley 6 extends through a front wall I0 of the upper housing 2. Detachably positioned against said front wall I is a cross-head chamber II, said chamber being detachably secured to said upper housing 2, as by screws Illa passing through a flange IEIb surrounding said front wall I0. Chamber II is open at both its ends and, at the end opposite the wall I0, there is provided a detachable cover plate I2 adapted to be removably secured to said chamber as by means of screws I3, only a fragment of said cover plate being shown in Figur-e 1. The entire cover plate is best seen in Figures 2, 23 and 25, which show that the cover plate comprises a body portion I4, from one face of which projects a raised marginal portion I5, having plain holes I6 therein to admit of the passage of said xing screws I3.

Returning now to Figure 1, the open end of the chamber has a flat margin I1, adapted to slide strucbe engaged by said raised marginal portion I of the cover plate, and said margin I1 is provided with drilled and tapped holes I8 adapted to receive said fixing screws I3.

The chamber I I is dened by a peripheral wall I9 extending around the bottom and two sides of said chamber, the inner face of which is stepped as shown at (see also Figs. 21 and 23) to provide an upper, wider compartment 2I and a lower, somewhat narrower compartment 22. The aforesaid end of the main shaft 5 extends into said upper compartment, and has fast on it a crank member 23, comprising a crank plate 2.4, from which projects a crank pin 25.

Similarly, the end of counter-shaft 9 remote from the gear 8 extends through the wall I0 into the lower compartment 22 of the chamber II, and has fast thereon a platelike crank body 26, of a secondary crank 21 comprising a crank pin 28 projecting from said crank body.

The opposite vertical portions of the peripheral wall I9 of the chamber II are recessed on their inner faces to provide a pair of upper slideways, 29, 29a, (see Fig. 21), only one of which is shown at 29 in Figure 1, and a pair of

lower slideways

30, 3|, best seen in Figure 21, one of which, 30, can also be seen in Figure 1. It will be understood that the upper slideways are in the wall portions corresponding to the upper compartment 2I and the lower slideways are in the wall portions corresponding to the lower compartment 22.

An upper cross-head 32 is disposed in the upper compartment 2I with opposite ends slideably engaging the upper slideway 29 and the complementary slideway 29a therefor (see Fig. 21), so that upper cross-head 32 is adapted to slide up and down in said upper compartment, and to be actuated for such sliding motion by the upper crank pin which extends into an elongated slot 33, provided in the upper crosshead 32 and disposed transversely of the upper compartment 2|.

Depending centrally from the lower portion of the upper cross-head 32 is a hammer bar 34 which extends downwardly through the lower compartment 32 into a reciprocable slide member 35 in a manner and for a purpose to be hereinafter explained. In Figure 1 the hammer bar 34 is shown broken so as to expose the lower crank pin 28.

In the lower compartment 22 of the chamber II there is similarly located a lower cross-head 36 having a slot 31 into which lower crank-pin 28 extends, opposite ends of said lower crosshead being slidably disposed in the slideways and 3|. Said lower cross-head 33 forms a part of said slide structure which is adapted to extend into the lower compartment 22, through an opening 38 provided in the lower wall 39 of the chamber II, whereby the upper portion of the slide structure 35 is adapted to be raised into said lower compartment 22 when the lower cross-head 33 moves upwardly in the slideways 30 and 3I as will be hereinafter explained.

The lower cross-head 36, crank 21 and counter shaft 9 thus form actuating means for the slide structure 35, and the upper cross-head 32, crank member 21 and shaft 5 form separate actuating means for the hammer means 34 to reciprocate the same in timed relationship with the reciprocation of the slide structure 35.

The lower portion of the slide structure 35 is adapted to reciprocate in a guide block indicated by the general reference numeral 42 which is also detachably secured to the housing 2 of the pedestal I. To this end the flanges Ib surrounding the end wall I0 have downwardly directed extensions 40 which, as seen at 4I in Figs. 23,- 24 and 25, are offset to the rear, that is towards the pulley 6, to allow for the greater width of the guide block.

As indicated in Figure 1 both the chamber II and the guide block 42 are conveniently secured to the anges Ib and 40 of the housing 2 as by means of fixing screws some of which are shown at Ia and 43 passed through said flanges from the side thereof nearest to the pulley 6 and thus screwed into the back of chamber II and guide block 42.

From the foregoing description it will have been noted that the upper compartment 2I is defined only by the corresponding portions of the wall I9 which extend only along opposite sides of said compartment, and of course, when the chamber II is assembled to the upper housing 2, also by the front wall I0 and the cover plate I2, so that as so far described said upper compartment is open at the top. The top of the compartment 2| which is also the top of the chamber I I is covered over by a detachable top plate 44 which may be secured in position to bridge opposite side portions of the wall I9, as by screws 45. The reason for this construction is to enable the upper crosshead 32 to be inserted into the

slideways

29, 29a when assembling the parts. It is preferred to assemble first the reciprocable slide structure 35, except for certain accessories as will hereinafter appear, then to assemble said slide structure with the guide block 42, and thereupon to introduce the upper portion of the slide structure 35, including of course the lower cross-head 36, into the chamber I I through the lower opening 38. If the hammer bar 34 is detachably mounted to the upper cross-head 32, as will hereinafter be explained, said hammer bar may be introduced into said chamber I I through the bottom together with the upper portion of reciprocable slide structure 35. Supposing the top plate 44 to have been removed from the wall I9, the upper cross-head 32 may be inserted from above into the

slideways

29, 29a, and, if necessary, coupled to the hammer bar 34. The top plate 44 is then secured in position and the whole of this assembly comprising the chamber II, cross-heads 32, and 36,

reciprocable slide structure 35 and guide block r ft2, may, after fitting of any previously omitted accessories, be secured to the flanges Illb and 40 of the upper housing 2, during which operation the crank pins 25 and 28 may readily be inserted into the corresponding slots 33 and 3l. Whereupon the coverplate I2 may be secured to the front of chamber II.

Referring now to Figures 3, 4 and 5, the guide block 42 comprises a main channel shape body member 46 secured, as hereinabove described, to the upper housing 2 so that the open side of the central channel 41 is free. The width of said channel 4l is such as to allow the lower portion of the slide structure 35 to slide freely therein, but the depth of the channel 47 is less than the thickness of said slide structure so that the latter projects beyond the end faces 48 and 49 of the legs 53 and 5I respectively of said body member 45. The difference between the depth of the channel 4l and the thickness of the lower portion of the slide structure 35 is taken up or compensated by two

bridge members

52 and 53, which are interposed respectively between the legs and 5I and a retaining plate 54, which retaining plate extends the full width and height of the bodymember 46 as is seenin Fig. l. 'The assembly composed of the

parts

46, 52, 53. and 54 is secured together as a guide block as by means of screws 55 passing through the retaining plate and through holes, such as the holes 55; in the bridge members and engaging internally threaded holes, such as the holes 5l, in the end faces 48 and 49 of the legs 50 and 5I.

Turning now more particularly to Figures 4 and 5, the

bridge members

52 and 53 are of a generally similar structure and comprise a recess, in the bottom wall of which a cam groove is provided. However, the recess 58 of the bridge member 52 is relatively long and deep and defines two relatively

narrow legs

59 and 60 of which the latter is the narrower, said legs being located at the extreme ends of bridge member 52. The cam groove 6I at the bottom of the recess 58 of bridge member 52 comprises a lower straight portion 62, an upper straight portion 63 oiTset with respect to said lower portion but parallel thereto, and one intermediate inclined operative portion 64. As seen in Figure 4 said lower portion 52 of the cam groove BI is offset to the bridge member 52 is in an assembled position said lower portion 62 will lie on the side of thev centre line of said upper portion 63 remote from the slide structure 35. Since the parts are to be regarded in their assembled relationship, locations remote from the slide structure 35 (such as that of said lower portion 62 of the cam groove 6i), will be hereinafter referred to as outward locations, and movements away from the slide structure will be referred to as outward movements. Similarly, locations nearer to the slide structure 35 and motions towards the latter will hereinafter be referred to as inward locations and inward motions respectively. These terms outward and inward will be employed in the same sense with respect to all sides of the slide structure 35, so that outward motion (or position) refer-red to one side will be in the opposite direction or perpendicular to, outward motion referred to another side, and similarly for the inward motion (and positions).

The bridge member 53 seen in Figure 5 ecmprises a relatively shallow recess 66 defining an upper relatively narrow foot 5l and a lower relatively long bearing portion 68. In the bottom of the recess 66 is a cam groove 69 comprising a lower outwardly located straight arm 10, parallel to the longitudinal centre line of bridge member 53 and an intermediate inwardly inclined arm ll and an upper arm I2 parallel to the lower arm 'ill and offset inwardly of the latter.

As seen in Figures 3, 21 and 22, in the end face 4S of the leg 5l! of the channel shape body member 45, to which end face the bridge memberI 52 (Fig. 4) is adapted to be applied, there is provided a contoured recess 'Z3 dened by a peripheral guide wall 14, which, on the inward side of the recess, comprises a straight portion l5 parallel to the longitudinal center line of said end face 43, and on the outward side includes lower and upper straight end portions 'I6 and Il respectively, best seen in Figures 21 and 22, which are parallel to the straight portion 'I5 nected by an outwardly arcuate intermediate portion 73. The outward and inward portions of the peripheral wall 'I4 are connected together by lower and upper arcuate end portions 'I9 and 83.' Secured to the outside of the aforesaid leg 5I)A and in a position to cooperate with the guide wall 'I4 as will hereinafter be explained, is a cam strip the left of the upperA portion 53, but it will be appreciated that whenv and are con-v I comprising an inwardly lying straight meinber 82 parallel to the stra-ight portion 15 of the guide wall 14 and located in close proximity to the side face 83 of said leg 50. The cam str-ip 8| further comprises an outward member 84 the shape of which is generally similar to the contour of the outwardly lying portion of the guide wall 14, so that said outward member comprises lower and upper

straight segments

85 and 86 connected together by an outwardly arcuate intermediate segment 81, and an inclined resilient end guide segment 35a, the free end of which normally rests against the outer face 83 of the leg 50. The total length of the cam strip 8|, that is the overall distance from the free end of the end guide segment 85a to the opposite end o-f the upper segment 86, is slightly less than the overall length of the contoured recess 13, that is to say, than the distance between the lower and

upper end portions

19 and 60 thereof, for a purpose which will become apparent hereinbelow. As shown in Figure 3 the cam strip 3i may be secured to and spaced from the outer face 83 of the leg 50 by means of an attachment strip 68 and screws 89, and conveniently the straight member 82 may be integral with said attachment strip and extend laterally therefrom.

The guide block considered as a whole, has therefore a slot, hereinafter called heading slot, in one side and an elongated opening in the opposite side, said slot and opening being defined in the embodiment shown by the

respective recesses

66 and 58 of

bridge members

53 and 52, and the part of the end faces of the respective legs 5| and 50 bridged thereby. As will afterwards appear there is a further slot to be called magazine slot in the same side of the guide block as the heading slot, and a feeder slot in the rear wall of the guide block as now about to be described.

As seen in Figures 6, 17, 23, 24 and 25, the rear wall 90 of the channel shape body member 46 has 'a slot 9| formed therein and extending therethrough, said slot being substantially centrally disposed in said rear wall 90 and extending as regards its major dimension parallel to the longitudinal center line of said body member 46. Said slot 9| is adapted to receive complementary blocks 6 in Iand 9 ib having each a oountersunk side face 92a and 62D (see Figs. 6 and 17). As best seen in Figs. 6, 23, 24 and 25, in at least one of said side faces, for example the side face 92a, there is provided a bifurcated cam groove G3, hav-ing an upper straight trunk portion 94 which is in alinement with a lower straight branch 95, and an arcuate branch S6, extending from an inwardly inclined transfer branch 06a, inwardly and upwardly to join the trunk portion 94, said transfer branch extending from the lower end of the arcuate branch 66 outwardly and upwardly to meet the lower end of the lower straight branch 95. rrhe trunk 94 and straight branch 05 of the bifurcated cam groove are disposed parallel to the longitudinal center line of the side face 92a. The arcuate branch 66 is so arranged that it extends from the trunl; S4 and straight branch 05 towards the open side of body member 46. It will be understood that the straight and arcuate branches '05 and S6 of the cam groove 93 define between them an island portion 92e.

The complementary blocks Qld and SIb are adapted to be removably secured in position in the slot 9| as by means of screws 91, and define between them a feeder slot 9|c.

With reference in general to the cam grooves and contoured recess and the like, hereinabove described. it should be pointed out that, although the general features thereof must be substantially as described, the actual design or proportion of the constituent parts and hence, the final appearance and dimensions of such groves and recesses, will depend to a certain extent on the size and relative proportions of the other component parts of the mechanism and also upon the size of the nail to be manufactured by the machine. It will also be appreciated that the exact position of such grooves and recess in the respective machine parts, with regard for instance to their disposal about the center lines of such parts, will also to some extent depend upon the factors just mentioned. Hence, the relative locations and dimensions of such cam grooves and recesses shown in the accompanying drawings are to be taken as being merely illustrative except for the essential characteristics mentioned hereinabove, such as comprising straight portions joined by inclined or arcuate portions. Moreover, for the purpose of more clearly representing such c'am grooves and recesses as well as the guide strip 8| some dimensions have been purposely exaggerated in the drawings. It is thought, however, that this specification contains sufficient information to enable anyone skilled in the art to design practical embodiments without any difficulty,

As can be seen in Figs. 6 and 17, the other leg 5| of the body member 46 has an elongated slot 98 extending heightwise of the body member and parallel to the longitudinal center line thereof, said slot being adapted to receive a magazine member to be described hereinbelow for heightwise reciprocation in said slot.

Turning now to Figs. 6, '1, 16, 17, 23, it will be noted that the reciprocable slide structure 35 comprises a plunger body 69 having a substantially L shape cross section. Said plunger body has an upper end |00, a rear face including an upper portion |0| and a lower portion Hita, a narrow side face |02, a wide side face it and a front face comprising an inwardly offset portion |04 and a front portion |05, between and perpendicular to which, is a transverse face |06 defining one side of a hammer guide channel |01, the outer end |08 of which (that is the end nearest the front portion |05) is defined by a shoulder or step |09 projecting from the front portion |05, whereas the inner end I i0 of said hammer guide channel |01 is defined by a step i|| formed in the offset portion.

That part of the plunger body dened by the front portion |05 and wide side face |03 may be regarded as the long leg of the L and it extends below the short leg of the L defined by the offset portion |04 and the narrow side face |02. Said short leg has a bottom face H2 on which are provided centering pins H3, and which has a drilled and tapped hole ||4 to receive a fixing screw for securing a complementary part to said bottom face. Said complementary part will be more particularly described hereinbelow with reference to Figs. 13, 14 land l5. As best seen in Fig, '1, near its lower end the front portion |05 of said longer leg is cut back to form a pair of spaced steps I I5, the front faces I6 of which lie in the saine plane at a level below said front portion |05 and are provided with screw holes ||1 so as to have secured to them a cover plate H8. The parallel faces ||9 of the steps H5, that is to say, the faces which are perpendicular to the front portion |05 define together with the inner face |20 which connects said parallel faces, a

press channel I2| adapted to be' covered by the cover plate I8 and to be open transversely of said longer leg.

The difference in level between the inwardly offset portion |614 and the front portion of the plunger body 99 is adapted to be compensated by Acompensation plate |22, best seen in Figs. 8, 9 and 16. Said plate has a narrow grooved face |23, which is adapted to engage the edge of the shoulder |09, and an inner face |24 adapted to engage the inwardly offset portion I (I4 and to extend therebeyond for the same distance as the lower part of the longer leg of the plunger body. In order to secure accurate fit'- ting of the compensating plate in the plunger body, dowel members, such as those shown at |25 in Figs. 8 and 9, may be provided on the compensating plate and corresponding dowel holes |26 may be provided in the inwardly offset face |04 (see Fig. 7). It is to be understood of course instead of providing dowels exclusively on the plate |22 and dowel holes in the face |04, I may provide some dowels and some holes on and in each of these two members. The compensating plate |22 may be detachably secured to the inwardly oifset face |94 as by countersunk screws |21 4(see Figure 16) passing through holes |23 in plate |22 and into tapped holes |29 in the face |94.

Extending lengthwise of the narrow grooved face |23 (Figs. 8, 16 and 17) is a narrow and shallow groove |39. As shown, said groove is slightly offset towards the inner face |24 of the compensating plate |22. At a position in the neighbourhood of the lower end of said compensating plate |22 to be determined by the relative locations of other parts to be hereinafter described, I provide a stepped recess extending transversely of the compensating plate and comprising a narrow shallow groove 3| extending from the outer side face |32 of plate |22 to the groove |39. Said stepped recess further comprises a heading member guide channel |33 of substantial width and a pair of spaced bearing surfaces |34 extending widthwise away yfrom said guide channel and adapted to be engaged by flanges |35 of a main closure plate |36 and an auxiliary check plate |31 (see Figs, 10, 11 and 12). The check plate |31 is adapted to be positioned on the bea-ring surfaces 34 at the ends thereof nearer the longitudinal groove |30 of the compensating plate |22 and said check plate is preferably of uniform cross-section. The main closure plate |35 has a bearing face |38, parts of which are adapted to engage the bearing surfaces |34 and has furthermore a substantially centrally disposed recess |39 which, in the assembled position of closure plate 35, extends parallel to the transverse groove |3I. The plates |36 and |31 vare adapted to be detachably secured in position on the bearing surfaces |34 as by means of 'screws |49 (see Fig. 21), to which end plain countersunk holes |40a are provided in the plates I 36 and |31 and tapped holes |4012 in shoulders |34 of plate |22. In the heading member guide channel |33 a heading member |4| (see Figs. 10, 16, 21 and 22) is adapted to it slidably, said heading member having on one side thereof a substantially centrally disposed raised or thick' ened portion I 42 extending lengthwise of said heading member and adapted to engage the central recess |33 of the closure plate |36. On either side of said thickened portion member |4| are somewhat thinner flanges |43 adapted toi-lt in the upper and of the heading lower narrower yheading finger portions of the heading member guide channel |33. On the side of the heading member Vremote from the thickened portion |42 I provide a heading finger |44 disposed parallel to the lon-v gitudinal center line of the heading member and as shown to one side of said center line, sa-id |44 projecting beyond one end |45 hereinafter called the inward end of the heading member. Said heading nger |44 is adapted to be a sliding nt in the transverse groove ISI. On the same side as the heading finger E44 but adjacent the other, outward end of the heading member 4|, is a cam follower pin |45 which is there provided for a purpose to be hereinafter explained.- It should be under-, stood that the overall length of the heading member is such that in the assembled condition the end thereof remote ,from the front face |45 projects beyond the outer face |32 of the com-l pensating plate |22, Figs. 8 and v9.

Turning now to Figs. 7, 13, 14, 15 and 16 it will be seen that the plunger body 99 as so far described still has, even after the applicationy ofthe compensating plate |22, an unlled gap extending inwardly from the lower portion |0|a of the rear face of the plunger body and dened by the bottom face 2 of the shorter leg and the uncovered portion of the lower end of the longer leg of the plunger body. To fill this gap in the manner indicated in Fig. 16, I provide a feeder block eral shape of which is such as to ll said gap so as to complete the rectangular cross-section which the slide structure 35 has near the lowerl end thereof. Said feeder block |48 has an upper face |49 drilled as indicated at |50 positioning pins ||3 and further drilled to provide a hole |5| extending heightwise right through said feeder tion of a fixing screw |52. The feeder block |48 also has an inner side face |53 adapted to engageI the lateral face |41 of the plunger body and recessed transversely of the vide a feed bar to which guide channel I 54 and shoulders |55 plates |55 may be secured, as

by means of screws |51 to retain in the feed bar channel a slidable feed bar as will hereinafter be described.

The feeder block further has an inside face |58 adapted to engage theinner face |24 of the compensating plate |22, and an outside face |59, which in combination with the narrow side face |92 of the plunger body-99 helps to complete the contour of the sliding member 35. Formed in the inside face |58 and extending right across the feeder block |48 so as to communicate with the feed bar channel |54 and to appear in the outside face |59 is a magazine channel |63 which is laterally closed or completed by the engagement of the inside face plate |22.

Turning now to other accessories to be fitted into the slide structure 35 and referring more particularly to Figs. 3, 16, 17 and 21, I provide a magazine housing I5! adapted to t in the' magazine channel |69 of feed block |48 (Fig. 14)

side of the feed bar channel |54 17). The magazine housing IGI wardly beyond the outside face |59 block |48 a suncient distance to extends outof the feeder of the lateral face |41V |48, the gen? to receive the' block to permit of the inser feeder block to pro-v lss of the-feeder block' |48 with the inner face |24 of the compensating pass through the magazine slot 93 to the outside of the corresponding leg 5| of. the' channels'h'ape body mem-i ber 46 when all the parts are in assembled condition and to extend slightly beyond the outward face |62 of said leg 5| of the channel shape body member 46. At the outside end of the magazine housing I provide closure means such as the cover slide |63 (see Fig. 17) which is kadapted to fit in channeled flanges |64 provided at said outer end of the magazine housing Within said housing I provide also a feeding spring |65 extending between sa-id cover slide |63 and the outermost one of a plurality of nail blanks |66 contained in said magazine housing. On the same side of the sliding member 35 as the one from which the magazine housing |6| projects I provide the heading member |4| which, as can be seen in Figs. 16 and 18 extends beyond the outer side face |32 of the compensating plate |22, and, in the assembled condition of the parts said heading member extends into the heading slot Idefined by the shallow recess 56 (Fig. 5) of the bridge member 53 pertaining to the guide block, the cam follower pin |46 of the heading member |4| engaging the cam groove 69 in said shallow recess 66.

As seen in Figs. 3 and 7, the inner end of the magazine housing |6| lies flush not only with the side of the feed bar channel |54 but also with :3121; grooved face |23 of the compensating plate In the feed bar channel |54 which is perpendicular to the center line of the magazine housing, I provide a feed bar |61, one end of which, namely, the one which in the assembled condition of the parts is nearer the magazine housing is of reduced thickness to provide a feeder tongue |58. The feeder member |61, |68 has a face substantially coplanar with the inner end of the magazine housing and the open side of the groove namely the face contacting the afore-mentioned side of the feed bar channel |54, and is thus adapted to reciprocate in front of and in close engagement with said inner end of the magazine housing |6| to feed a blank at a time towards a position in front of and in engagement with the grooved face |23 of compensating plate |22 in such a manner that the central longitudinal stripA of the blank overlies the open side of longitudinal groove |30.

The opposite end of the feed bar |61 is provided with cam follower means such as the camming pin |69, for instance on the same side of the feed bar as the feeder tongue, saidend of the feed bar, in the assembled condition of the parts, extending into the feeder slot dened by the cooperating counter-sunk side faces 92a and 92h of complementary blocks 91a and 91h pertaining to the guide block and so that the camming pin shall engage in the bifurcated cam groove 93.

On the side of slide structure opposite the magazine and heading member, I provide a pressing assembly |10 including a channel shape ram guide |11 and a ram |12. As shown in the drawings (Figs. 3, 17, 21 and 22) the ram guide has projecting from one side of it, a guide pin |13, and on the opposite side, has a slot |14 through and beyond which an actuating pin |15 extends, said actuating pin being fast on said ram |12. In the arrangement shown, the guide pin |13 and the actuating pin |15 are so disposed on the pressing assembly that the guide pin will, in the assembled position of the parts, extend into the contoured recess 13 to engage the dening walls thereof and the actuating pin |15 will extend into the cam groove 6| of bridge member 52 (Fig. 4) which, it will be recalled, is applied to the leg point in the operation of the device.

of the channel shape member 46. Furthermore, the pressing assembly is adapted to reciprocate in the press channel |'2| provided in the lower portion of the plunger' body, the arrangement being such that the ram |12 is alined with the open side or longitudinal groove |30 in the compensating plate |22, and the ram and ram guide move perpendicularly to the common plane of the inner end of the magazine or open side of groove |30.

The ram |12 is an accurate sliding fit between the legs |16 of the channel shape ram guide |1| and is of a width substantially equal to the width of the longitudinal groove |35 less twice the thickness of a nail blank, so that the ram can cooperate with said groove to press a nail blank into the groove as will hereinafter be described to perform one step in the nailforming operations. Since the ram |12 is an accurate sliding lit in the ram guide |11, it follows that the end edges |11 of said ram guide (see Fig. 3), at the inward end thereoi:` will overlap corresponding edges of the longitudinal groove to the extent of one thickness of a nail blank, so that if, after a blank has been forced by the ram |12 into the longitudinal groove |30 iii such a manner that what were previously the longitudinal side edges of the flat nail blank are ush with the grooved face |23 of the compensating plate |22, the ram guide is advanced to engage said grooved face, said end edges |11 will act to hold the partly formed blank securely in said longitudinal groove even if the ram is retracted therefrom.

The ram guide |1| has secured to the outward end thereof a transversely disposed camming member |13 having upper and lower bevelled camming edges |19 and |80 respectively. The lower bevelled edge is disposed on the outward side of the camming `member |18 and is adapted to coact with the end guide segment a of the cam strip 84 secured to the leg 50 of the channel shape body member 46, to raise said guide segment 85a from the side face 83 of said leg 50 to permit the camming member |18 to pass between said end guide segment 85a and said face 83 at a certain As will hereinafter be explained, said lower camming edge |80 is also adapted to coact with the upper end of the cam strip 8| to guide the camming member |13 into the space between the straight member 82 of the cam strip 8| and said side face 03, as will also be hereinafter made clear.

The upper bevelled camming edge |19 is disposed on the inward side of the camming member |18 and is adapted to cooperate with the outward face of the end guide segment 85a to assist in guiding the camming member |18 onto the outward face of the outward member 84.

Referring now to Figs. 19, 20 and 21, the slide member assembly further comprises a hammer bar 3d of cross-section such that it will be a good sliding iit in the guide channel |01. The upper end of said hammer bar, as has already been indicated, is secured to the upper cross-head 32.

As best seen in Figs. 21 and 23, for example, and as shown, the hammer bar 34 is detachably secured to a forwardly extending projection 32a provided on the lower edge of the upper crosshead 32 and so positioned that the hammer bar 34 when secured in place and when the whole of the operating parts are assembled, will be in strict alinement with groove |01 (Figs. 7 and 25).

The hammer bar 34 may be xed to the projection 32a as by bolts 32h and nuts 32e.

At its other end and on one side of the hammer bar I provide a hammer member |81 of cross-sec- I3y tion to be a good sliding iit in the longitudinal groove |30 of the compensating plate |22, and substantially of the same cross-sectional area.

As already indicated the lower cross-head 33 forms part of the reciprocable slide member 35 and to this end is preferably secured to or formed integrally with the upper end of the plunger body 3 and is located to the rear of said upper end so that in the assembled condition of the machine the hammerv bar 33 may reciprocate in front of the lower cross-head 33 without fouling.

The machine, as so far described operates as follows, particular reference being had to Figs. 3, 17, 18 and 21 through 25. In Figs. 3, 21 and 23 the parts are shown in their lowermost position and in Fig. 3 I have shown the magazine housing I6! empty as if the machine were about to be used for the iirst time. lt will 'be noted that with the parts in the position shown in Figs. 3 and 21, the hammer bar 34 is also in its lowest position with the hammer member |8| extending to the bottom of the groove |30 of compensating plate |22. The heading member |41 and the feeder tongue |53 are in the outward or retracted positions whereas the pressing assembly |10 is in its inward or advanced which, however, the ram |12 is in retracted position with respect to the groove |33. The camming member |18 is just below the end guide segment 35a of the cam strip 3|, with the upper bevelled camming edge |13 in engagement with the outer face of the lower end of the end guide 85a. For clarity it may be mentioned that the cam follower pin |43 of the heading member i4! and the actuating pin |15 of the ram |12 are, in the positions shown in Figs. 3 and 2l, at the bottom of the lower arm 1d andthe lower portion 32 respectively of the cam grooves 3S and 6| in

bridge members

53 and 52. The guide pin |13 of the channel shape ram guide |1| is similarly at the bottom of the lower portion 13 oi the contoured recess 13 and, as seen in Fig. 21, the camming pin |69 of the feed bar |31 (see Figs. 6 and 17) is at the lowest point of the bifurcated groove 93 (Fig. 23). This lowest point coincides with the juncture of the inclined branch 36a and the arcuate branch 33 so that the camming pin 69 is in a position to follow the arcuate branch 33 rather than the straight branch 95 when subsequently moved upwardly with respect to said bifurcated groove.

It will now be supposed that the magazine housing |E| is loaded with a charge of blanks and Kclosed at its outer end with the |33 as shown in Fig. 1'?. is in position the inmost blank 33a (see Fig. 23) will be positioned opposite the inward end of the feeder tongue |38 (see also Fig. 17) and substantially in engagement therewith. It may here be remarked that the section of the lower portions of Figs. 23, 24 and 25 has been taken in the plane of the surface of the hammer bar 34 adjacent the inward end |23 of the compensating' plate |22, which inward end |23 lies in a common plane of contact with said surface. The section of the lower portion of Figs. 2, 22, hasbeen taken on a plane defined by the surface of the ram |12; leg 50 of the chan-- remote from the end 38 of the nel shape member 32 of the guide block assembly, which plane includes the corresponding surfaces of the hammer member |3| and the heading iinger |44 except for the thickness which thickness has. however taking the section. With the been neglectedy in dimensions chosen,

spring |35 in' position between the rearmost blank and the slidel .as soon as the charge of a nail blank,

position, in

ssl

this section plane also passes just-tothe outside of the cam follower pin |43 of the headingmember |4| so that bridge member 53 is also in sec-v tion in a plane coinciding with the bottom cam groove 69, but the section plane willextend bee tween the bottom of recess 33 of the other bridge member 52 and the face 33 of the leg 5|).

Referring now also to Fig. 1 and supposing that after loading of the magazine a work piece to be nailed has been placed on the table 3 below the guide block assembly 42, if the pulley 6 is caused to rotate, the main shaft 5 will be rotated and thereby, for the reasons already set forth, cause rotation of counter-shaft 9 an-d the crank member 23 and secondary crank 21. Rotation of crank member 23 will, by raising upper crosshead 32 retract the hammer bar 34 and hammer member |3| with respect to the recipI rocable slide member 35 inasmuch as the throw of the crank member 23 is greater than the throw of the secondary crank 27, so that the upper crosshead 32 will be displaced upwardlyand thereafter downwardly also, at a greater rate than the lower crosshead 33 and also to a greater extent. Hence, there will be relative movement between the reciprocable slide member 35 and the iixed guid block assembly d2 by reason of the motion of the lower crosshead 36 and also relative motion of the hammer bar and hammer member with respect to the reciprocable slide member 35.

During the upward motion of the upper crosshead 32, therefore, the hammer member |8| will be retracted in the groove |33 (Figs. 3 and 21) and the parts are so proportioned that when the crank member 23, and, therefore, also the upper crosshead 32, has reached the top of its stroke, the hammer member |8| will have been retracted upwardly for a distance equal to at least the full height of a nail blank.

At this juncture and with reference to Figs. 26 through 28, it may be explained that the nail blanks 66 I use are in general of a rectangular shape having, a lower pointed end |32 and at their upper end a projecting appendage |83 1ying in the general plane of the blank and disposed centrally of its widthwise dimension, said appendage being intended to provide a head after being bent over as will hereinafter be described. The width of the appendage |33 is such that it will nt into the longitudinal groove |33 of the compensating plate |22 and the inclinededges |33a forming the pointed end |32 are long enough to extend into marginal portions |84 of the blank which marginal portions themselves extend lengthwise of the blank on either side of a central strip |35 of width to nt into said longituinal groove |33. nail blank is from |32 to the extreme the extreme end of the point end or the appendage |83.

Continuing now with the description of the op-` eration of the machine, and with reference to Figs. 21 through 25, it will inasmuch as the face of the hammer member |8| which is exposed when said hammer member is in groove |33, is ush with the inward end face |23 of the compensating plate |22, the presence of the hammer member |3| in the lower portion of the groove |30 will Considering now more particularly-the lower Hence the full length of the- ?-be observed that,

not affect the positioningagainst said inward end face |23, of a nail blank, and it is required that the hammer member |8| crosshe'ad 36 which is connected to or forms part of the reciprocable slide member 35, it will be noted (Figs. 22 and 24) that upward movement of lower crosshead 36 will cause upward movement of the slide member 35 to displace the cam follower pin |46, the camming pin |69 and the guide pin |13 and the actuating pin |15 in their respective cam grooves, bifurcated groove and contoured recess to actuate the associated parts. Owing to the hereinbefore described shape of the grooves and recesses, during the first part of the upward travel of the slide member 35, the cam follower pin |46 and the actuating pin |15 will move only upwardly along the

lower portions

16 and 62 respectively of cam grooves 69 and 6| so that there will be no inward or outward displacement of either the heading member |4| or the ram |12. The channel shape ram guide |1| will almost immediately begin to move outwardly by reason of the engagement of the upper bevelled camming edge |19 of the camming' member |16 with the inclined end guide 85a to bring the guide pin |13 into engagement with the lower straight portion 16 of the outward lying part of the guide wall 14 of the contoured recess 13. The ram guide |1| will therefore be retracted with respect to the longitudinal groove and the inward end face |23 of compensating plate |22, to permit the passage into position in front of said groove of a nail blank.

At the commencement of the upward motion of the slide member and with reference to Fig. 23, the feed bar |61 and feed tongue |63 are in such a position, slightly advanced inwardly from their outermost position (in which the camming pin |69 is in engagement with the

straight portions

95, 94 of the bifurcated groove 93) that the inward edge |86 of the feeder tongue |66 just engages the outer edge of a nail blank |66a which has been fed forward by the action of spring (see Fig. 17) against the lateral face |41 of the lower portion of the plunger body 99. In Figs. 23, 24 and 25 the plane of section passes just in front of the inward end of the magazine housing |6| so that the nail blank |6611 engaged by the inward edge |86 of the feeder tongue |68 is visible. Since the camming pin |69 is, as hereinabove explained, in a position, at the very commencement of the upward movement, such that it will follow the arcuate branch 96 of the bifurcated groove 66, upward movement of the reciprocable slide 35 will cause inward movement of camming pin |69 to move the feed member |61 inwardly to push the nail blank |66 towards the longitudinal groove |36, that is to say towards a position in which the central strip of said nail blank |66a is in alinement with the inward end of the ram |12. This final position is shown in Fig. 24.

Continued upward motion of the reciprocable slide 35, will bring the actuating pin |15 of the ram |12 (see Figs. 3, 4 and 5) into the inwardly inclined portion 64 of the cam groove 6| and also brings cam follower pin |46 of the heading member |4| into the inwardly inclined portion il of the cam groove 66 and causes the guide pin |13 of the ram guide |1| to approach the arcuate portion 16 of the contoured recess 13. Said guide pin |13 is held in engagement with the outvv'ardly lying wall portion of the contoured recess 13 by the action of the camming member |18 as it rides over the outer face of the cam strip 6|.

The parts are so proportioned that when the inward edge of the ram |12 is about to engage the central strip of the nail -blank positioned as already described, the camming member |18 will commence to move over the arcuate segment 81 of the camming strip 8| so that the guide pin |13 will commence to move along the arcuate portion 18 of the contoured recess 13 to retract the ram guide |1| from the nail blank.

It is to be understood that when the feeder tongue |68 feeds the strip |66a into position in front of the groove |36, the ram guide |1| has been retracted by the action of the end guide segment a just sufficiently to allow said nail blank to pass between the inward end of the ram guide and the inner end face |23 of the |22, so that the ram guide |1| will act, until retracted, to maintain the nail blank |66a against said inner face |23. It will also be appreciated, particularly from Figs. I and ,17, that outward movement of the nail blank |6601. beyond the groove |36 is limited by the overlap of the inner end of the cover plate I8 beyond the lateral face |41 to the extent of bringing said inward end to the same level as the step and the shoulder |69.

During the aforesaid continued upward movement of the reciprocable slide 35, the camming pin |66 of the feeder member |61 will move in the outwardly directed part of the arcuate branch 66 of bifurcated groove 93 (compare Figs. 23, 24 and 25) to cause retraction of said feed member from the nail blank |66a and to thereby gradually uncover the inwardend of the magazine housing |6I.

As the reciprocable slide 35 further continues its upward motion, the ram |12 will be advanced by movement of the actuating pin |15 in the inclined portion 64 of cam groove 6| (Fig. 4) to force the central strip of the nail blank |66a into the longitudinal groove |36 (Fig. 22) whereby the lateral margins of said blank are bent away from the inner face |23 of compensating plate |22 and towards the ram guide |1|, which, during this part of the operation, is rapidly moved by the arcuate segment 81 of camming strip 8| and arcuate portion 18 of contoured recess 13 respectively, to its outermost or fully retracted position, so as to allow said lateral margins of the nail blank to be bent up as described.

Comparing Figs. 4 and 5, it will be noted that the upper straight portion 63 of the cam groove 6| is longer than the upper straight portion 12 of the cam groove 69, so that the ram |12, the actuating pin |15 of which travels in the cam groove 6|, will reach its inmost or extreme advanced position in which it completes the first of the two nail forming steps, before the inner end of the heading finger |44 of the heading member |4| (the cam follower pin |46 of which travels in the groove 66) reaches its inmost or head forming position. It will also be. noted that because of this timing relationship, the ram |12 (Fig. 22) will remain in its fully advancedposition while the heading finger |44 moves into and out of its respective. fully advanced position, whereby the upper end of the ram |12 acts as an anvil over Awhich the appendage |83 ofthe nail blank may be bent by the heading nger |44. This second and final nail forming operation, namely the bending over of said appendage to .form a nail head, is effected as the ram and heading finger Il!!! reach their uppermost positions (see Fig. 22).

During the rst and second nail forming steps. the feeder member |61 will have'been moved by engagement of its camming pin |69 with the trunk portion 94 of the bifurcated groove et, into its outermost or fully retracted position shown in Fig. 25 so as to clear the innerl end of the magazine housing itl, and thereby allow another nail blank |66?) to be advanced by the spring |65 against the lateral face lli-1 of the plunger body 99, in position to be moved opposite the longitudinal groove |36 at the commencement of the next cycle of operations.

It will be appreciated that when the various cam follower and actuating pins have reached their 'uppermost positions the reciprocable slide 35 and also the crossheads 36 and will have reached their uppermost positions, so that at f the same time the hammer bar 34 will likewise have been raised to bring the hammer member |8| into fully retracted positie in which its lower end, as indicated in Fig. 2 is just above the inward end of the heading finger Mii when the latter is in fully-advanced position.

With the parts in the mutual relationship just described, they are ready to commence the downward or return stroke. Continued rotation of the main shaft 5 will therefore initiate the return stroke during which the the heading member mi will move downwardly in cam groove 12 and 1E from the position shown in Fig. 22 to the position shown in Fig. and the actuating pin |15 of the ram |12 will move downwardly in cam groove 5| to be eventually retracted into their outermost positions, from the position shown in Fig. 3 to the position shown in Fig. 21, as will readily be understandable from the drawings.

The camming pin |69 (Fig. 25) of the feeder member |61 in moving down will follow the straight trunk 94 and the straight branch 95 of the bifurcated groove 93, thereby retaining the cam follcwerpin Ult of feeder member |61 in outermost or fully retracted position until, near the end of the downstroke the camming pin |69 engages the inwardly inclined branch 96a of the bifurcated groove 93 to` move the feeder member |61 inwardly to bring the inward edge |86 of feeder tongue |60 into engagement withV a new blank such as the blank|66a Fig. 23.

Considering now the ram guide |1|, it should be noted that towards the end of the upstroke of reciprocable slide 35 (Fig. 22), said ram guide |1| is moved inwardly by the action of the inwardly curved part of arcuate portion 18 of the guide wall 14 on the guide pin |13, the 'camming member |18 being thus caused to ride over the corresponding parts of the guide strip 8|. The parts are so proportioned that the inward end of the ram guide |1| will be moved into engagement with the inner face |23 of compensating plate |22 to hold the partly formed nail, and also the same nail after being fully formed, in the longitudinal channel |30 by the overlap of the inner ends of the ram guide over the edges of said longitudinal hereinabove explained. The ram guide moves into said engaging position when th Vguidi? Dingroove |30 ias upper extremity of the con'- commencernent of the downward movement at the reciprocable slide35, the camming member |10 will be deflected inwardly by engagement of said'edge |80 with the upper parts of saidl camming strip 8|. whereby the camming member 18 is positioned to move along-the spacebetween the side face 83 of the channel shape member 46 and the-straight portion 82 of said camming strip 8|, to maintain the ram guide |1| in its fully advanced-or inmost position during-the whole of the downstroke. In this manner the overlap of the inward end of the ram guide- |1| over the longitudinal groove |30 will assist in maintaining the nail in said channel after retraction of the ram and during the effective stroke of the hammer bar 8| to be described hereinbelow.

Shortly after commencement of the downstroke, the actuating pin |15 of the ram |12 will enter the inclined portion 64 of the cam groove 6| (Fig. 4), and travel of said actuating` pin |15' along the inclined portion will cause retraction of the ram |12 (Fig. 17) toits outermost positioninwhich it is quite clear of the groove |30 and the therein contained fully formed nail.v At the same time, the heading finger |144 will have been retracted from heading position so as to allow the hammervmember |8| to descend and engage the head of the nail under the action of the descending upper crosshead 32, the parts being so proportioned that engagement of the hammer bar |8| with the nail head will take place immediately after the heading finger |44 and the ram |12 have been retracted sufliciently to be out of the way.

As the hammer bar 34 descends the hammer member |8| moves downwardly in the groove |30 driving the fully formed nail before it and` out through the bottom end of said groove (Fig. 21). If, as previously supposed, a workpiece is positioned underneath the guide block assembly the hammer ybar |8| willrdrive the nail into the workpiece to effect a operation is completedfwhen the hammer bar and the two

crossheads

32 and 36 reach the bottom of their strokes, which -position is illustrated in Figs. 1 and 3 (and 21). The parts willthen be in a position to repeat the cycle already described.

While there have been shown and described and pointed out thefundamental novel features of the invention as applied to certain preferred embodiments, it will be understood that various omissions andsubstitutions and changes in the formand details of l1. A nailmaking and nailing machine adapted toform` nails from sheet-metal blanks and to drive -the for-med nails out under hammer acof said upper nailing operation. Said l tion, said machine comprising a guide block. aA slide member reciprocably mounted in said guide block, a magazine for nail blanks including an inner end, secured in and carried by the slide member, a longitudinal groove in the slide member, said groove having an open side, feeding means reciprocably mounted in the slide member and having a face movable substantially in a plane common to the inner end of said magazine and the open side of said longitudinal groove, ram means reciprocably mounted in the slide member and positioned perpendicularly to said plane and opposite said open side, hammer means in said groove and reciprocable lengthwise thereof, actuating means for said slide member, actuating means for said hammer means, said hammer actuating means being coupled to said actuating means for the slide member, and actuating means for said feeding means said slide member in the guide block causes a nailblank to be fed into position in front of the groovel and the ram means to press such blank into the groove to effect a nail forming operation, whereupon said hammer means is caused to drive the formed nail along and out of said groove.

2. A nailmaking and nailing machine adapted to form nails from sheetmetal blanks and to drive the formed nail out under hammer action, said machine comprising a guide block having a central channel, a rear wall and a pair of opposite sides, said channel being parallel to said rear wall and said sides, a feeder slot in said rear wall,

a magazine slot extending through one of said In' sides, an elongated opening in the other side, a slide member mounted in said channel for reciprocation therein, a magazine housing for nail blanks including an inner end secured in and carried by said slide member, said magazine housing extending into said magazine slot, a longitudinal groove in said slide member, said groove having an open side, feeding means reciprocably mounted in the slide member and extending into said feeder slot, cooperating means on said feeding means and in said ing said feeding means, the feeding means having a face movable substantially in a plane common to the inner end of the magazine housing and the open side of the longitudinal groove, a pressing assembly reciprocably mounted in the slide member and extending into said elongated opening, cooperating actuating means in said pressing assembly and in said opening for reciprocating said pressing assembly, hammer means in said groove and reciprocable lengthwise thereof, slide actuating means for said slide member, and actuating means for said hammer means, said hammer actuating means being coupled to said actuating means for the slide member, whereby movement of said slide member in the guide block causes a nailblank to be fed by the feeding means from the inner end of the magazine housing to a position in front of the longitudinal groove and the pressing assembly to press said blank into said groove to effect a nail forming operation, whereupon said hammer means is actuated to drive the formed nail along and out of the groove.

3. A nail making and nailing machine adapted to form nails from sheet-metal blanks and to drive the formed nail out under hammer action, said machine comprising a guide block having a central channel, a rear wall and a pair of opposite sides, said channel being parallel to said wall and sides, a feeder slot in said rear wall, a magaand ram means whereby movement of a feeder slot for reciprocatlongitudinal groove in zine slot extending through one of said sides, a' elongated opening in the other side, slide member mounted in said channel for reciprocation therein, a magazine for nail blanks including an inner end, secured in and carried by the slide member, said magazine housing extending into said magazine slot, a longitudinal groove in said slide member, said groove having an open side, feeding means mounted in the slide member, the feeding means extending into said feeder slot and having a face movable substantially in a plane common to the inner end of said magazine housing and the open side of said groove, cam means in said slot and on said feeding means arranged to cause reciprocation of said feeding means in the slide member, to thereby cause a nail blank to be fed from said inner end into a position in front of said open side of the groove, a pressing assembly reciprocably mounted in the slide member and extending into the elongated opening, said pressing assembly being perpendicular to said common plane, cam means in said opening and on said pressing assembly arranged to reciprocate the pressing assembly in the slide member to cause a blank positioned in front of said groove to be pressed thereinto to be formed into a nail, slide actuating means arranged to cause reciprocation of said slide member in the guide block, and actuating means for said hammer means arranged to cause reciprocation of the hammer means in the slide member in timed relationship with tre reciprocation of the slide member.

4. A nailmaking and nailing machine adapted to form nails from sheet-metal blanks and to drive the formed nails out under hammer action, said machine comprising a guide block, a slide member reciprocably mounted in said guide block, a magazine for nail blanks including an inner end, secured in and carried by the slide member, a

the slide member, said groove having an open side, feeding means reciprocably mounted in the slide member and having a face movable substantially in a plane common to the inner end of said magazine and the open side of said longitudinal groove, heading means reciprocably mounted'in the slide member and positioned on the side of the longitudinal groove remote from the open side thereof and perpendicularly with respect to said plane, a guide channel for said heading means in the slide member, said guide channel communicating with the longitudinal groove, ram means reciprocably mounted in the slide member and positioned opposite said open side and in alinement with the heading means, hammer means in said groove and reciprocable lengthwise thereof, slide actuating means for said slide member, actuating means for thehammer means, said hammer actuating means being coupled to the slide actuating means, and actuating means for the feeding means, the heading means and the ram means in said assembly whereby on movement of said slide member in the guide block causes a nail blank to be fed from the inner end of the magazine to a position in front of the longitudinal groove and likewise causes the ram means to be reciprocated to press said blank into said groove in an initial nailforming operation and said heading member to be reciprocated in the guide channel to form a head on the partly formed nail in a final nailforming operation, and the hammer means to drive the formed nail along and out of said longitudinal groove.

5. A nailmaking and nailing machineadapted toY form nails from sheet metal blanks and to