US2569891A - Automatic injection feed appliance for rivets and headed fastenings - Google Patents

Description

Oct. 2, 1951 B. T. HOLTER 2,569,891

AUTOMATIC INJECTION FEED APPLIANCE FOR RIVETS AND HEADED FASTENINGS Filed Oct. 13, 1950 3 Sheets-Sheet 1 LVVENTOR.

Jruc T j'zolfer DRNEYS Oct. 2, 1951 B. T. HOLTER 2,569,891

AUTOMATIC INJECTION FEED APPLIANCE FOR RIVETS AND HEADED FASTENINGS Filed Oct. 13, 1950 3 Sheets-Sheet 2 1 N VEN TOR.

,Brace Tjfo/fer,

21W AT RNEYS Oct. 2, 1951 Filed Oct. 13, 1950 AND HEADED FASTENINGS HOLT AUTOMATIC INJECTION FEED APPLIANCE FOR RIVETS 3 Sheets-Sheet 5 95 V fire/a9 T ff INVENTOR. oiz er. I

PATENT OFFICE This invention relates-to an automatic injection feed appliancefor feeding rivetsor headed fastenings to openings and'which is adapted to be mountdon a -portable pneumatic riveting tool for supplying rivets 'to'op'eni'ngs so that the rivets onheaded*fasteningsmay thereafter-be operated upon o'r' 'upsetby the riveting hammer to thereby eliminatethe need for manually inserting the rivet or 'ia'stening by handor by a separate rivet feeding device and to"*furtherprovide an appliance' to function 'asanattachment for a portable pneumatic riveting hammer which will great- 1y: facilitate the riveting work and enable rivets to be much more: rapidly 1 applied and set,

Moreparticularly it is an object of the present" invention to provide'an automatic means by which rivets or headed fastenings may be gravity fed to a barreland pneumatically ejected from the barrel into an openingand which may be operated readily in -conjunction with a portable pneumatic hammer on which the feeding clevice is alppliedas an attachment to eliminate the manual handling'of the rivets or fastenings.

Another object of theinventionli to provide an attachment for riveting hammers which is so constructed that the opening into-which the rivet is to beappliedwillnot be obstructed from the view ofthe operator bythe hammer or the feeding appliance and wherein the injection tube or barrel moves forward for injecting the rivet or fasteninginto an opening and thereafter'is automatically retracted out of the way of the peening element of the hammer. l a

Still a further-object of the-invention is to provide a 'feed appliancesof extremely simple construction which may be economically manufactured and sold, which will beextremely efficient and durable for accomplishing its intended purpose and ,whereina loaded magazine may readily replace an unloaded magazine on the appliance so that the hammer and appliance will not have toremaininoperative while the appliance magazine is being reloaded.

A further object jofthe invention is to provide a device wherein air pressure is applied to the ejection tube'ofthe appliance through a part of the rivet hammer, utilizing the same air pressure employed to operate the hammer under the f AU'iioMA'ricINmo'rIoN FEED APPLIANCE v FQRRIVETS AND HEADED FASTENINGS Bruce Holter, Newberry, Pa. f :App li'cation October 13, 1950," Serial No. 190,023

' 15 Claims.

Various other objects'and advantages of the invention will hereinafter become more fully apparent from the following description of the drawings, illustrating a"presently preferred embodiment thereof, and wherein: Figure 1 is a side elevational view showing the appliance secured to and mounted on a conventional pneumatic rivet hammer;

Figure 2 is a fragmentary side elevational view of a portion of the hammer and appliance looking toward the side thereof opposite the side as seen in Figure 1 Figure 3 is a rear elevational view of the rivet P feed and hammer looking from left to right of Figure 1 and with a portion shown in section; Figure 4 is an end elevational view looking in the opposite direction or from right to left of Figure 1; a

Figure 5 is a fragmentary longitudinal substantially central sectiona view, partly in side eleva tion of a portion of the feed appliance and including a portion of the hammer; i

Figure 6 is a vertical sectional view, partly in elevation showing a portion of the appliance taken substantially along a plane as indicated by the line 65 of Figure 5, and

Figure 7 is a fragmentary horizontal sectional view taken substantially a ong a plane as indicated by the line 1-1 of Figure 5. A

Referring more specifically to the drawings, the feeding and injection appliance for rivets and headed fastenings, constituting the invention, is designated generally Ill and for the purpose of illustrating a preferred application and use of the appliance or attachment ID a conventional pneumatic rivet hammer of the portable type is illustrated in the drawings and is designated generally II. The rivet hammer H is generally pistol-shaped includin a barrel l2 containing a piston not shown, which is projected from left to right of Figure 1 or toward the muzzle of the barrel l2 by air pressure for projecting a peening element l3 outwardly of v a the muzzle end of the barrel 12 for upsetting a control of an actuating element. disposed to be rivet. Any suitable means such as a spring en gaging around the stem of the peening element I3 and attached to the barrel [2 may be utilized for returning the peening element to a retracted position, said spring not being illustrated. The hammer II also includes a handgrip [I4 having a threaded opening l5 (Figure 3) in thebottom thereof for receiving a threaded stem or coupling 16 which is attached to an end of an air hose ,H, the opposite end of which hose is adapted to be connected to a source of compressed air, not shown. Above the stem IS a washer is is disposed in the upper portion of therecess I5 having a radial opening l9 communicating 1 with a, passage, not shown, in the handgrip I4 through which the compressed air from the hose I I may pass to a trigger-type valve 20 which is reciprocally mounted in the handgrip I4 beneath the barrel l2 and which is adapted to "be displaced inwardly of the handgrip to release the air for passage into a cavity 2| of the handgrip which is in communication with the rear end of the barrel l2 to thus supply compressed air for projecting the piston, not shown, toward the peening element 1 3; The parts heretofore described are of conventional construction and have merely been 'briefly described and partially illustrated to afford a better understanding of the appliance I9. Further, the power tool II is shown solely for the purpose of more clearly illustrating (and describing the feeding appliance in and representsonly one of many types of pneumaticpower tools on which the appliance I'D may be mounted and in ;connection with which it may be utilized and it is to be understood that the invention is not intended to be limited to a pneumatic hammer of the type disclosed in the patent application.

;The appliance includes a pair of strap members 22 having outwardly bowed intermediate portions which engage around the enlarged,

rear 'end of the barrel 12, each engaging an op-,

posite side thereof, said strap members having lower terminal portions each of which is secured to aside of the grip 14 by a screw fastening 23; The straps-22 have inwardly offset abutting portions 24 disposed above the barrel l2 which are secured together by nut and bolt fastenings 25. Above the fastenings 25, the portions "24 are bowed outwardly in opposite directions to provide laterally offset upwardly extending portions 26 which terminatein 'outturned flanges 2'l constituting the opposite-ends of the straps 22 and which project away from one another and are disposed in substantially the same plane. Aplate 28 'is supported on and secured 'to' the flanges 27 by flush rivets or similar fastenings 29, as best seen in Figure 6, and said plate 28 provided with a downturned rear edge portion forming a depending transverse flange '30 which is located behind the strap members 22 and which is provided with a downwardly extending slot 3| having a flared substantially semicircular lower portion 32 which opens outwardly of the bottom edge of the'fiange 30. The upper end of the slot 31 which opens outwardly of the upper edge of the plate 28 registers with a transverse slot 33 in said plate 28 which extends forwardly from its rear edge and from the depending flange 30. The depending flange 30 is provided with enlargements 34 on its forward side, as best seen in Figure 6, which are disposed between the strap portions 26 and which straddle the slot 3| and are disposed above the arcuate notch'32, for a purpose which will hereinafter become apparent.

.A switch assembly, designated generally 35 is secured to the flange 30 adjacent its bottom edge by nut and bolt 'fa'stenings 36 and is disposed behind said flange and projects upwardly to above the plate 28. The switch assembly 35 is composed of 'a plurality of plates orplies, which will hereinafter be described in detail including a rear plate 37, an intermediate ply formed of end sections '38 and 38a, a front ply formed of end sections 39 and 39a and a spacing 'ply 40 interposed between the back plate 31 and the sections 38 and 38a. The parts 37, 38 38a, 39,

7 39a, and '40 are connected'by additional nut and bolt fastenings 41; The front sections 39 and 39a terminate above the level of the plate 28 and 4 the front surfaces of the plate sections 38 and 38a are disposed with their bottom edge portions in abutting engagement with the rear surface of the flange 30. The back plate 31 is provided with a forwardly 'Toifset flange 42 forming an ex tension of its upper edge and which rises from the assembly 35 adjacent the front face of the spacing plate 40, as best seen in Figure 1.

A magazine, designated generally 43 is detachably mounted on {the upper edge of the switch assembly 35 and is composed of a back plate 44, a front plate 45 and an intermediate plate 46 which plates are secured together by suitable fastenings E1. 'The "front" plate 45 and intermediate plate 46 are actually formed of sections each extendin from top to bottom or end to end of the magazine 43 to form asinuous feed slot for rivets orheaded fastenings, desigrated generally 48 including an ;,outer,portion Ailformed by the sections of the front plate 45 and which is suba stantially narrowerthan the bed portion- 50 of the slot 48 and which is. formed by the sections of the intermediate plate lfi. Saidsinuous rivet or headed fastening feed slot 43 extends from the upper to the lower end of the magazine 43 and opens outwardly 'of said ends and is adapted to be filled through 'either'end, preferably the upperend of the slot 48 with rivets or headed fastenings R, as illustrated in Figure 6, the heads of which fit slidably in the bed portion 5!! -of the slot and the shanks or'stems of which extend outwardly therefrom through the "restricted slot portion i9 which -is-narrower-than the rivet or fastening heads to retain-therivet heads in the slot portion 5!). The, sections defining: the front plate 45 have outturned -fianges'49a at their inner edges which define the outer slot portion 7 49; which flanges are disposed on'opposite sides of said slot'portion '49 and perpendicular, to the front plate 45, forsupportingthe stems 'or shanks of the rivets or headed fasteningsR while in engagement'with the feed slot '48 to maintain said shanks substantially perpendicular "to the plane of the magazine E3 to prevent any part of the fastenings from binding in the feed slot 48. The magazine '43 is provided adjacent each of its ends with a pair of :pins 51' whichextend. therethrough and which straddle the "ends" ofthe slot 48. Each end of the :rivet slot 48 is adapted to be closed, after said slot has been filled with rivets :o-r headed fastenings, by a closure plate 52 which detachably engages an-end of the magazine 43 and which is provided at each end and each side edge with a strap '53 disposed perpendicular to the plate 52 and which straps engage opposite sides of the magazine 43 and are'p'r'o vided with notches 54 opening outwardly of corresponding side edges thereof to receive the ends of thepins 5|. It will thus be seen that each cover plate 52 may be applied against an end of the magazine 43 and'then displaced laterally to engage the strap notches '54 thereof "with the a'djacent'pins 51 to detachably retain the cover in an applied position. By 'moving the cover 52. in the opposite direction the notches 54 are disengaged from the pin 5| so that the" cover can be removed. 7 I

The lower end of the magazine 43 rests upon the upper edge of the forward portion of the switch assembly 35 when detachably applied thereto and in front of the flange 42 and is pro-- 7 vided with openings, not shown, adjacent its lower edge for receiving headed fastenings 55 which extend forwardly through the fla ge 42 and ment with the niagazine'to thereby dtactlably' secure the magazine to the flange 42.""The fastenings 55 are preferably fixed to the flange 42. The flange 42 is provided with upwardly opening notches 51, as best-seen in Flgll1f83f0ff3060fltfandthe strap portions 28. A post88 is fixed to and-rises from the forward end of the sleeve 18 and has an upwardly projecting stem 8! which is engaged by an eye member 82 connected to the opposite,- rear.zend 'of the spring 11. A guide rod 83 is fixed "t6 and extends rarwardly from the upper portion of the rear edge of the plate 13 and reciprocally engages the intermediate guide bore II for guiding the ejection tube 84 in its modating corresponding ends of the pins 5| i0 10. reciprocating movement and for preventing said Gated adjace t t e bO edge -fi tube-from turning in the barrel 58. A contractile 43 and it will be readily apparent-that thebot coil: spring 84* extends loosely through the upper tom cover 52, not shown, would be removed before b r '12 id b d t t forward d t the magazine is thus attached to thetswitcliflts th'e upper'edge of the plate 13 by a hook member sembly 35 and is arily dispo ed- 15 85 and is anchored at its rear end to the rear verted position and the switch-assembly inverted while the magazine is being"-connected to the flange42 to prevent the rivets or headedfasterilings R from escaping through the lower end of: the slot 48 after removal of thebottom cover and before the magazine is attachedto the switch assembly 35.

A tube 58 is disposed longitudinally above the)? barrel I2 and adjacent itsrearend extends be tween the strap portions 26 and is clamped therein. A-wedge bck 59',-as best seen-in Fig ure-5,-is disposed between the upper portion of the barrel 58 and the plate 28 and may be welded or otherwise suitably secured to said -parts. strap member; designated generally 88 has an intermediate portion 8| clamped aroundthe barrel 58, adjacent its forwarde'nd-by fastenings B 2 which extend I through abuttin portions of the strap 88 which extend downwardly from the 'barrel 58. The terminal portions of; the strap 80- :are bowed outwardly to provide clampportions 63 which are clamped aroundthe'barrel l2- by "the fastenings 82 and an additional fastening 82a which engages the termirials of the strap be- 'neath the barrel I2. The barrel or tube 58 is thus rigidly supportedabove the barrel- I 2 -and-provides a guide for an ejection tube-0r barrel-84,-therear end of which is reciprocally disposed inthe barrel 58 and the forward end of which-extends from the forward end of said barrel and terminates in-an ejection head or no-zzle 85- having. four circumferentiallyspaced forwardly extending spring fingers or strips'GB terminating in tapered converging free ends 8'I,=-for a purpose which will hereinafter become apparent.

-A bracket 88 is fixed to and-rises fromnthe barrel 58 behindand adjacent thestrapportion BI and supports a guide 89 which is preferably formed integral with the bracket 88 and which is disposed above the forward" end of the barrel 58 and over a part of the barrel 84 which is disposed in advance of the barrel 58. The guide 69 is positionedlongitudinally of the barrel 58 and includes three longitudinally disposed hores,- which extend longitudinally therethrough, as best seen in Figure 5, including. a lower bores") an intermediate bore II and an upper bore 12. A plate I3 rises from thebarrel or tubetkand; is secured thereto by a sleeverportion I4 which is clamped around the barrel 64 forwardly of the barrel 58. The plate 13 is disposed longitudinally of the barrel 84 and has-aflange "-projecting transversely from one side thereof. An arm 18 is formed integral with and extends rearwardly' from the rear upright edge of the plate I3 toward the bottom bore in. one eridpfacoi'ltractile p n 1 is nc red to the -arm I8 by afa'steh in'g la and 'zitends rearwardly" therefrom loosely through the bore 'lfl'. AISBQQVGEJIQ: is slidablyi mounted on the barrel 58l5tween the bracket 88' portion OfthUgllldG 89 by a hook 86. "On'the right-hand side of the applianceya seen in'Figure l, a slotted bar 81 is supportedat its forward'e'nd on thearm I8 by the fastening 209 I8 and extends rearwardly therefrom along the right-hand side of the'guide 89. A fastening in-- eluding a boltshank 88'extends transversely from the right-hand side of the guide 89 and slidably engages the slot ofthe bar 81 to form a stop for'limiting-the forward movement of the tube and the plate 13 which is fixed thereto.

A diagonal brace 89 is secured at its lower, forward end to "a stepped rear portion 90 onthe" guide 88;whichis disposed below the upper bore I2; as" seen in Figure 5, and extends upwardly andrearwardlytherefromand has an apertured opposite end 9'I'which abuts against the front side ofthe magazine 43 intermediate of its upper and lower ends and'whic'h" is detachably secured 3'53 thereto by a headed pin 92,'corresponding to the zontal plane. 'The"le ver"98 is pivotednear one cludes -anupright plate portion I83, as bestseen ififFigure fliwhich is'di'sposed between the rrtnr plats '39an'd"39a and the spacer plate 48 for" tea verse reciprocating movement between the at stop plates stand-738a,? "r e plate rimmer its ofjthe rivet carrier I02 is provided with a rela re rgw srwvsi n s t s .est inl from top tofbottom thereof and which is atialli tends outwardly beneath the adjacent portions .of the bottom edgesof the front-plates 58 and-58a and which slidably engages on plate 28 and'has one end moveable into and out ofabutting engagement with the stop plate 94. The plate portion I85 is provided with a slot I55 which extends rearwardly from adjacent its forward edge and which opens at its rear end into the recess I84 but which is substantially narrower than said recess 34 and of substantially the same width as, the slot, 48a. The opposite end of the link 9'? ispivotally connected by'a pivot member I 8? to the end of the plate portion I whichis located adjacent the stop, plate 94. 'The barrel 58 and tubeii4 are provided with elongated substantially T-shaped openings I 08, as best seen in Figure 5, which register with the slots 3i and 33 and with the space between the enlargements 34. The plate I85 is normally retained by the spring 84, as will hereinafter become apparent, in its positionof Figures 5, 6 and 7 in which position its slot I55 is inregistry with the slot 83 and out of registry with the slot 49a so that a portion of the plate 585 will normally close the lower endof the slot 49a,,as. best seen in Figure 6. Likewise when the carrier.

I82 is thus disposed the sleeves l5 and I88 are in their retracted positions of Figure 5 with, the

sleeve I88 disposed behind the registering barrel A nozzle H8 is secured in the rear end of the barrel 58 behind the rear end of the tube 54 and behind the restrictor I59 and is connected to and communicates with the outlet end'of an air supply pipe III. which extends downwardly therefrom and is connected at its opposite end to the outer 'end of a valve casing H2. The valve-casing H2 is closed at each end thereof and fits into a rearwardly opening recess H3 of the hammer II, as best seen in Figurefi and is connected thereto by a threaded connection H4. As best seen in Figures 3 and 5, a supply pipe H5 is disposed in the cored out bore portion H of the pneumatic hammer H and has its upper end secured to and opening into the chamber of the valve housing H2. Said supply pipe H5 has its lower end flared as seen at. H5111 Figure 3 and fitting in the upper end of the recess I5 and against the lower end of an annularly restricted portion Illa through which the pipe H5 extends. An annular sealing gasket or washer IIl isdisposed in'the recess I5 between the flange H6 and the washer I8. A valve body I I8 is slidably mounted in the housing H2 and is urged toward the outer end thereof by an expansion spring I I9, one end of which abutsagainst the inner end of the housing H2 and is supported in a centered position by a stem I28 which extends from said inner end of the housing and the opposite end of the, spring H9 fits into and abuts against the valve H8 which is cup-shaped and opens toward the stem I28. A valve stem I2I ex.- tends from the opposite side of the'valve H8 through a stop sleeve I22 and outwardly through an opening in the outer end I23 of the housing H2, which end may be detachably connected in any suitable manner to the remainder. of said housing. The valvestem I2I is provided with'a thumb plate or disk I24 at its outer end. The

I stop'sleeve' I22'is'of a length to permit the spring 48 by gravity so that the bottom'three rivets will- H9 to movethe valve H8 to the left only vto its position of Figure 5 in which position. it is disposed to close the end of the supply tube H5 tion to insure that the tube 64 and valve 58 will 8 be correctly disposed so that their openings I88 will fully register.

Assuming that a'loacled magazine'43 isdemountably supported as a part of the device In by the fastening means 55, 56 and 92, 83 and that theparts'are in their normal positions as illustrated in Figures 1, 2 and 5 to '7, the rivets R, will feed downwardly in the magazine feed slot pass downwardly from the feed slot 48 by gravity into the switch assembly 35.

forms an extension of the restricted slot portion 49. The carrier or switch plate I will be normally disposed as illustrated in Figure 6 to close the lower end of the slot 49a to support the lowermost rivet R and the rivets disposed thereabove. To operate the rivet or headed fastening feeding appliance II! in conjunction with the hammer I I, the hammer grip I4 is grasped in the right hand and the operator then grips the'fiange 5 with the fingers of the left hand and pushes outwardly to project the ejection tube 64 toward an opening into which arivet is to be fed. The recessed upper left-hand corner of the magazine 43, as illustrated in Figure 3 and designated I21 will afiord the operator an unobstructed view of the nozzle 65 and the opening into which a rivet is to be inserted, not shown, so that as the tube 54 is projected forwardly, as just previously described, .the right hand may be utilized to guide the appliance I0 so that the spring fingers 86, 51 may be inserted into the rivet opening when the tube 64 has been moved to a fully projected position. This forward displacement of the tube 64 through the barrel 58 will be against the action of the spring which will be expanded and the tube will be guided in its travel by the barrel 58 and the guide rod 83 which slidably engages the bore 1 I. As the plate I3 moves forward with the tube 64 the spring 11 will likewise initially expand and will thereafter exert a sufficient pull on the stem 8| to displace the sleeve I9 forwardly until it abuts or substantially abuts the rear end of the bracket 68 and at which time the stop fasten-.

lever 96 to swing clockwise as seen in Figure '7.

This will cause'the link 9'! and the carrier or switch unit I82 to move away. from the stop plate 84 and until the carrier portion I83 contacts and is stopped by engagement with the stop plate 88a at which time the slot I86 will be in registry with the slot 49a to accommodate the stem of the bottom rivet, R whichthen; drops downwardly into The heads of the rivets R which enter the switch assembly 35 .will i theslot I06 and into apposition resting on the plate 28. The tube 64 and parts fixed'thereto are then permitted to return to their positions of Figures 1 and 5 by retraction of the spring 84;

however,.instead oipermitting the tube 64 to ac- 5 are instead actually displaced forwardly as the tube slides rearwardly inthe barrel 58. As this occurs, the spring 11 rapidly goes solid and thereafter exerts a push againstthe stem 8| to force the sleeve 19 back to its position of Figure 5 as When this occurs, the carrier or switch unit I52 moves back to its position of -Figure fito-close the lower end of the, slot 49a and so that the slot )8 will register withthe slots 3 l and 33 to allow the rivet which is then engaging the slot 106 to drop through the slots 33 and 3] and through the registerin'g openings I08 into a position in the barrel or tube 64 as illustrated in Figure 5. The operation just previously described would then be repeated to feed a rivet from the tube 64 if there were no'rivet previously in said tube or the rivet previously inthe tube ,would have been applied while the tube 64 was in an extended position in l a mannernow to be described.

Assuming'that the tube 64 is in an extended position and with the fingers 66, 6'! in an opening into which a'rivet is to be iedgthe thumb of the hand gripping the hammer portion I4 is pressed against the button I24 to displace the valve H8 inwardly against the spring H9 to uncover the tube H5 so that compressed air supplied through the hose l1 may pass through the valve housing H2 and pipe III to the nozzle Hi].

This compressed air Will pass under pressure through the restrictor l09to propel the rivet R through the 40 tube 64 and outwardly through the spring fingers 66 into the opening engaged by said spring fingers. In order to prevent escape of the air through the registering openings I08, the sleeve I00 is connected by the rod I01 to the sleeve 19 so that when said sleeve is displaced forwardly or from left to right of Figures 1 and 5, as previously described, the sleeve IUD will move over and f close the openings )8 until the rivet R has been ejected and when the tube 64 is returned to its retracted position of Figure 5 by the spring 84 the sleeve I00 willalso assume its'position of Figure 5 to expose the openings Hill. The enlargement I26 engages the notches I25 as the tube 64 reaches its fully retracted position to insure,

complete registration of the openings I08. It will also be obvious that another rivet will have been fed intothe carrierplate slot I06 while the tube 64 was projected for applying the rivet and this rivet will then drop into the tube 64 as said tube is retracted to its position of Figure 5, so that each time that a rivet is fed and applied andthe tube thereafter retracted, another rivet will be fed into said tube-64.

It will be obvious that a supply of magazines 43 may be maintained loaded with rivets having stems of different sizes so that a magazine may be at any time removed from the appliance l0 and replaced with a fully loaded magazine having rivets or, headed fastenings of the same or differ- Q ent size and without the appliance! 0 being rendered inoperative during a reloadingperiod. 'Various modifications and changes are contemplated and may obyiously be resorted to, without departing from the spirit or scope of the inven- 1 ,tion as hereinafter defined by the appended 'tachably fastened to a pneumatic impact tool for supporting the guide barrel above the impact tool, an ejection tube reciprocally mounted in the guide ,barrel having a forward end terminating in an outlet extending forwardly from a forward end of: the guide barrel, a switch assembly secured to "one of saidsupporting members and disposed the tube 64 reaches a fully retracted position.

above the: guide barrel adjacent its opposite, rear end, amagazine having a lower end detachably 'conne'cted'to and supported on said switch assembly, said magazine having a rivet or headed fastening slot extending from top to bottom thereof and opening outwardly of its upper and .lower ends'adapted to be filled with rivets or headed fastenings fed downwardly through said magazine'slot by gravity, said switch assembly including a front plate having 'an upright slot communicating. with a portion of the magazine slot for receiving stems of headed fastenings or 'rivets fed downwardly by gravity from the magazine, a carrier reciprocally mounted in the switch assembly for movement transversely of thegu'ide barrel and having an upright portion provided .witha recess to accommodate the heads of the rivets or fastenings the stems of which engage the slot of the switch assembly front plate, said carrier :having a horizontal plate .portion normally closing the bottom of said front plate slot and including a slot normally disposed out of registry therewith, said ejection tube and guide barrel barrel andconnected to said tube, link and lever 'meanseonnecti'ngsaid slide and carrier for reciprocatingthe carrier transversely of the barrel as the ejection tube is reciprocated longitudinally therein for moving the slot of the horizontal carrier portion into and out of registry with the front plate slot of the switch assembly and the T- shaped openings of the barrel and tube for feeding the rivets or headed fastenings one-by-one from the front plate slot to theejection tube, anair nozzle mounted in the rear end of the guide bar- -relfor directing air under pressure through the ejection tube toward its outlet end from a point behind said T-shaped openings for propelling a rivet or headed fastening through the ejection tube and outwardly of its outlet end, a conduit for-supplying air under pressure to said nozzle having an outlet end connected to the nozzle and an inlet end adapted to be connected to an air pressure conduit of the pneumatic impact tool,

and a manually op'ened normally clos'edvalve interposed in said air pressure conduit.

2. A feeding'device as in claim 1, said valve being disposed adjacent the handgripportion of the pneumatic impact tool to be operated by the thumb of the hand gripping and supporting the tool and feeding "device. r 3. A feeding device as in claim 1, and a handle member secured to theejection tube -forw'ardly not the guide barrel. adapted to be manually operated for displacing the ejection tube outwardly of the guide barrel into a position for directing a rivet or headed fastening fromthe outlet end of the ejectiontube into a ri-vet opening and for removing the carrier to a position to align the slot of its horizontal portion with the front plate slot of the switch assembly for receiving the stem of a rivet therein by gravity feed.

4. A feeding device as in claim 1, and a handle member secured to the ejection tube forwardly of the guide barrel adapted to be manually operated for displacing the ejection tube outwardly of the guide barre1 into a position for directing a rivet or headed fastening from the outlet end of the ejectiontube into a rivet opening and for moving the carrier to a position to align the slot of its horizontalmportion with the front plate slot of. the switch assemblyfor receiving the stem of a rivet therein by gravity feed, and contractile spring means for returning the ejection tube to a retracted position in the guide barrel and for a rivet or headed fastening from the outlet end .of the ejection tube into a rivet opening and for moving the carrier to a'position to align the slot of its horizontal portion with the front plate slot of the switch assembly for receiving the stem of a rivet therein by'gravity feed, a guide member secured to the guide barrel having a bore disposed parallel to the axis of said guide barrel,

7 a rod fixed to said handle and reciprocally enremoved before the magazine is connected'to the switch assembly. 1

11. A feeding device as in claim 1, and a diagonal brace having one end rigidly secured to the guide barrel and an opposite end provided with fastening means detachably connecting the brace to the magazine intermediate of its upper and lower ends.

12. A feeding device as in claim 1, and a restrictor fixed in the ejector tube behind the T-shaped opening thereof'to prevent the rivets or headed fastenings sliding rearwardly from the ejector tube into the guide-barrel. V V r 7 1B. A feeding device as in claim 1, and a hail-- dle member secured to the ejection tube forwardly of the guide barrel adapted to be manually operated for displacing the ejection tube outwardly of the guide barrel into a position for directing a rivet or headed fastening from'the outlet end of the ejection tube into a rivet opening and for moving the carrier to a position to align the slot of its horizontal portion with the front plate slot of the switch assembly-for receiving the stem of a rivet therein by gravity feed, and a contractile spring connecting the handle and link and lever means and-forming a gaging'in said bore and retaining the ejection tube against rotation relatively to the guide barrelto maintain the T-shaped openings in full registration when the ejection tube is in a fully retracted position.

6. A'feeding device as in claim 1, and a fastening or rivet discharge nozzle mounted on the outlet end of the ejection tube including a plurality of outwardly projecting spring fingers having inwardly converging free ends through which a rivet or headed fastening is adapted to be ejected from theejection tube and guided by said spring fingers into a rivet opening.

7. A feeding device as in claim 1, and guide means including a part fixed to the guide barrel and a part fixed to the ejection tube, said guide means part having inter-engaging relationship for guiding'the tube in its reciprocating movement in the barrel to position the T-shaped opening of the tube in full registration with the T-shaped opening of the barrel when the tube is in a fully retracted position.

8. A feeding appliance as in claim 1, and a closure sleeve reciprocally mounted on the guide barrel and connected to said slide and moveable from a position behind the T-shaped opening of the guide barrel into a position for closing said opening to prevent the escape ofair therefrom when, the tube is moved forwardly to a projected rivet dischargingposition.

9. A feeding device as in claim 1, said rivet or headed fastening feed slot of the magazine being of a sinuous shape and including an inner head receiving portion. of a greater width than the outer, stem receiving portion thereof.

10. A feeding device as in claim 1, and closure members detachably mounted on the ends of the magazine for closing the open ends of its feed slots, the closure member on the lower end of a :loaded magazine being adapted to be resilient connection between-the slide and ejection tube. I r

14. A feeding device as in claim 1, and stop members forming a part of the switch assembly limiting the sliding movement of the carrier to position the slot of the carrier in registration with the T-shaped openings at one extremity of movementof the carrier and in registration with the front plate slot of the switch assembly at the other extremity of movement of the carrier.

15. A fastener feeding and applying device-for.

use with a portable pneumatic impacttool, comprising a guide barrel means adapted to detachably mount the guide barrel on a pneumatic impact tool and longitudinally thereof, an ejection tube reciprocally mounted in the guide barrel having an outlet end extending from a forward endof the guide barrel,v a switch assembly supported by said means above and transversely of the guide barrel adjacent its opposite, rear end, a magazine detachably connected to the switch assembly and supported thereabove in an upright position, said magazine having a rivet or headed fastening slot opening outwardly of its lower end adapted to be filled with rivets or headed fastenings to be fed therefrom by gravity to the switch assembly, said guide barrel and ejection tube having rivet or headed fastening receiving openings adjacent theirrear ends disposed in registration when the ejection tube is in a retracted position, said openings being laterally offset relatively to' the lower end of the magazine slot, a carrier reciprocally mounted in the switch assembly for movement transversely of the guide barrel between a position beneath the outlet end of the magazine slot and above said T-shaped openings for conveying rivets or headed fastenings one by one from the magazine to the ejection tube, and link and lever means connecting the ejection tube and carrier for reciprocating the carrier transverse to the guide barrel as the ejection tube is reciprocated longitudinally in the guide barrel for feeding the rivets or headed fastenings one by one to the ejection tube.

BRUCE T. HOLTER;

No references cited.

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