US2283665A - Apparatus for installing rivets - Google Patents

Description

May 19, 1942. c, c, CADDEN 2,283,665

\ APPARATUS Fon I'NSTALLING RIVETs Filed July 1, 1939 2 sheets-sheet 1 vMay 19, 1942.

APPARATus FQR IINSTALLING RIvETs Filedk July 1, 1959 2 sheets-smet 2 fix ' 65E/es 55E-raden with parts broken away.

Patented May 19,i 1942 APPARATUS Fon INSTALLING ItIvE'rs Charles C. Cadden, Akron, Ohio, assignor to The B. F. Goodrich Company, New corporation of New York York, N. Y., a

Application July 1, 1939, Serial No. 282,531

(Cl. 2 18-19) i 23 Claims.

This invention relates to apparatus for installing tubular rivets and is especially useful in inserting and upsetting tubular rivets such as those of the Waner Patent No. 2,149,199, issued February 28, 1939, which rivets are applied from one side only of thework. l The present invention contemplates the pro- 'vision of power-operated mechanism for placing and upsetting the tubular rivet, and withdrawing thetool.

Cil

The principal objects of the invention are to provide effective and compact power-operated mechanism for the purpose, to provide for the employment of fluid pressure in the operation thereof, to relieve the operator of fatigue, to provide for control of pressure, to provide simplicity of construction, and to provide for convenience of operation.

These and other ob'jects will appear from the following description and the accompanying drawings.

Of the drawings,

Fig. 1 is a side elevation of one embodiment of the invention, with partsy broken away and parts shown in section to expose the mechanism.

Fig. 2 is a similar view with certain parts replaced, parts being broken away.

Fig. 3 is a side elevation of the opposite side,

Fig. 4 is a detail sectional View of the rivetholding tip or anvil of the apparatus.

Fig. 5 isa detail sectional view taken on line 5;-5 of Fig. 1.

Fig. 6 is a detail sectional view taken on line 6 6 of Fig. 1.

Fig. 7 is a detail sectional view taken 1 1 of Fig. 1.

Fig. 8 is a detail sectional view taken on line on line 8-8 of Fig. 1.

broken away. Fig. 1 1 is a detail sectional view taken online I4-I4 f Fig. 13.

Fig. is a detail sectional view taken on line |5|5 0f Fig. 13.

Fig. 16 i2 a detail sectional View taken on .line Nif-I6 of Fig. 13.

Fig. 17 is aperspective View of the tubular rivet with the draw-rod engaged therein before upsetting the rivet, the rivet being shown partly in section, other parts being broken away.

Fig. 18 is a sectional view of the upset rivet en# gaging a Wall member, the anvil and draw-rod being shown in place, other parts being broken away.

Fig. 19 is a side view of the conm-o1 valve 4|, parts being broken away.

Fig. 20 is a section thereof taken on line 20-29 1 of Fig. 19.

Fig. 21 is a section thereof taken on line 2 I--2I of Fig. 19.

The-invention is' useful especially in applying internally threaded tubular rivets of the con! struction shown in Figs. 17 and 18 by application from one side only of the work. In Fig. 17 the rivet A is shown positioned upon the applying illustrated in Figs. 1 to 12, the numeral' I0 designates the frame or stock from which a hollow barrel II extends. The barrel is threaded at one end as at I2 to engage la threaded opening in thestock and atthe other end as at I3 to remov'- ably engage a tubular tipor anvil I4. A draw-rod I5, for engaging the threaded bore of the tubular rivet, extends through the bore of the anvil for L free axial movement with respect thereto.

The draw-rod is threaded at its shank end to engagel an internally threaded coupling sleeve IE which has slidingengagement'with ythe bore of the barrel Il. The draw-rod is also formed with a polygonal ange I1 for engaging la wrench. The .coupling sleeve I6 is threaded on a drawbar I8 extending through the barrel Il whereby the draw-rod I5 may be rotated to engage in `or to disengage atubular rivet, and may be drawn k back with respect tothe anvil I4 for the purpose of upsetting the rivet as hereinafter explained. f

The arrangement'is such that by removing the anvil I4 from the barrel Il the draw-rod I5 may be removed and replaced and draw-rods and anvils of different sizes or shapes may be provided or worn or broken ones replaced.

The mechanism for operating the draw-rod is cover plates I9, 20 areattached to opposite lsides of the stock to support certain of the mechanism and to enclose the chambered portions and provide passages for Aconiining and directing the operating iluid, the plates being retained by screws 2I, 22. y

For rotating the draw-rod by hand, as an optional mode of operation, a shaft 23 is rotatably mounted in a bore provided therefor in the stock in alignment with the draw-bar I8. A knurled knob 24 is xed to the shaft at the rear of the stock. The upper longitudinal portion of a recess 25 in the stock surrounds the spaced apart and aligned ends of the draw bar I8 and the shaft 23. A sleeve 26 surrounding the ends of the drawbar I8 and the shaft 23, is pinned, as at 21, to the end of the draw-bar, and is formed with an axial slot 28 to receive a cross pin 23a extending through shaft 23. The arrangementis such that the draw-bar I8 may have axial movement with respect to shaft 23 without disturbing the driving relation of one to the other.

For providing power-actuated reciprocal movement of the draw-bar, a block 29 is xed longitudinally thereof and is slidably mounted in the recess 25 for movement in a direction axially of and with the draw-bar whichy extends therethrough and is rotatably journaled in said block, grooves 30, 3| being formed in the side plates for guiding the block. A collar 32 is fixed to the draw-bar with sleeve.25,to retain the block 29. The block is retained between the collar 32 and the sleeve 26 and has rack teeth 33` in its lower face. A segmental gear member 34 is rotatably mounted on a shaft 35 within the central portion of recess 25, the shaft being supported in bearingsformed in the side plates I9, 2U. Gear member 34 has pinion teeth 34a formed on one margin thereof to engage the rack teeth 33 and at its diametrically opposite margin has gear teeth 35 formed therein at a greater pitch radius, said teeth being adapted to be driven by a segmental gear 31 rotatably mounted on a cross shaft 38 also extending between the side plates. Gear 31 is neatly tted in a cylindrical recess formed in the stock at a bottle neck central portion of the recess 25 and between the side plates.

That portion of the recess 25 below the gear terial, retained in the groove to conduct the pressure iluid therealong. Cross-passage extends through side plate I9 and far` enough into stock I0 to connect with an inlet port 49 leading to groove 4I b in the valve 4I (see Figs. 1, 2 and 7). An outlet port 50, substantially diametrically opposite to inletl port 49, extends fromthe valve through stock I0 to the atmosphere.y A port 5I connects the valve to the triangular cylinder portion of recess 25 at the right side of the \vane 39, as seen in Fig. 1, and the cylinder portion at the other side of the vane is connected through a port 52, extending through side plate 20 to the valve,'by way of a. tube 53 of rubberlike material, andof square cross section, conilned in a groove 53a-in the outer face of plate 20, covered by plate 54, toa passage 55 extending -through side plate 28 and far enough intostock I0 to connect with a port 55, leading to groove 4Ie of the valve 4I. The valve 4l is of the fourway type, and is formed with an axial groove 4Ia in its face, adapted at the position of the valve 'shown in Fig. l, to connect none of the ports, a circumferential groove 4Ib, which at the sameposition of the valve (see Fig.l1) -connects ports 49 and l5I to each other, and a third groove 4Ic, extending circumferentially and then axially of the valve in an L-shaped path, which in the same position of the valve connects ports and 56 with each other. In a second position of the valve, resulting ,from rotating the valve in a counterclckwise direction, as viewed in Fig. 1, through 31 is of triangular form with one arcuate wall margins of the triangular lower portion of th recess 25 to receive similar packing strips 40a (seel Figs. 1 0 and 11).

Pressure fluid, such as compressed air, for reciprocating the draw-bar I8 to collapse and release the rivet. is controlled and supplied by way of a rotatable valve 4I, seated in a cylindrical recess in the stock between side plates I9, 20. A hose connection 42 is xed to the stock and supplies air to the valve through'a passage in the stock connecting with a cross-passage 44 therethrough and through sideplates I9 and 20 (see` Fig. 6). The cross-passage 44 is connected to a second cross-passage 45 by a groove 46 in the `outer face of the side plate I9 (see Fig. 2) said groove being covered by a cover plate 41 and lined by a tube '4 5 of square cross section (see Figs. 6 and 12) vand of resilient rubber-like maa small angle, groove 4Ia connects ports 49 and 56 to each other, groove 4Ib connects ports 58 and 5i with each other, and groove 4Ic connects none of the ports. In the position shown in Fig. l, air under. pressure is admitted to the right` side of the cylinder recess sequentially 'through passages 43, 44, 46, 45, 49, 4Ib and 5I, and the left side of the cylinder recess is ,open to the atmosphere through passages 52, 53a, 55, 56,

4Ic, and 58, so that the vanqis held in the position shown.

For operating. the valve 4I, handle 51 is xed thereto. A coil spring 58, of the compression type, is located in a recess 59, formed in the outer face 'ofv the side plate 20 .and beneath cover plate 54'. The spring is compressed between the end of the recess 59 andan arm 60 xed to theA valve. The arrangement is such that lever 51 is normally held in a raised position, as shown in Fig. 3, and with the valve 4I as shown in Fig. l, and the draw-bar I8 is normally held in advanced position, as in Fig. 1, by air flow to the cylinder recess at the right side of the vane. as seen in Fig. 1, from the air passage 43 sequentially through passages-44, 46, 45, 49, 4Ib, and 5I, the other passages 52 to the,` cylinder recess being open to the atmosphere through passages 53, 55, 55, die, and 55.

Upon depressing the lever 51, the valve 4I is rotated in a counterclockwise direction in Fig. ll and the recess at the `right side of vane 391s opened to the atmosphere through passages 5I, Mb and A5I), and compressed air flows from passagev 43 through passages 44, 46,45, 49. 4in1, 55, 55, 53, and port 52 into the chamber at the left side of vane 39 as seen in Fig. Land the drawbar I8 will be retracted until the lever 51 is released, whereupon the spring 58 will return the valve 4I to the position-shown in Fig. l, and passage 43 will again be connected with passage 5I, through passages 44, 46, 45,49, and 4Ib, and the draw bar will be moved toward the' anvil.

For rotating the draw-bar by fluid pressure independentof its retracting movement, a -luid pressure motor and control valve are provided as follows: The motor is conveniently constructed of a plurality of plates 6I, 62, 63, 64 held together and to the side plates I9, by screws 65 which pass through al1 the plates and are threaded into bosses on the side plates. Plate 63 has an llever 85 and is under tension. At its neutral position, the valve 16 has a pin 90 which extends between the free ends of the arms84, 85 which, together with pin 88, hold the valve'in neural position. The arrangement is such that when `the valve is rotated in either direction the pin 90 will y deiiect one or the other of the levers 84, 85 teneight-shaped aperture 66 in which a pair of spur gears 61,-88'are positioned (see Fig. 9). 61 is fixed to shaft 23 while gear 68, which meshes Gear therewith, rotates on a stud 69Axed to plate 62.

A pair of inlet ports 10, 1| are provided through -plate 62 to communicate with the eight-shaped ters of the gears. The arrangement is such that when air under pressure is admitted from port 10, gear 61 will be rotated in a clockwise direction in Fig. 9 and when air is admitted from port 1I rotation will be in the opposite direction. f

A three-way valve 16 is rotatably mounted in a cylindrical opening in the stock I9. Air is supplied to the valve from `the end of cross passage 44 by means of a groove v11 formed inthe outer face of side plate 20 and covered by plate 5d. Groove 11 connects with a cross passage 18 through side plate 20 and about three-quarters of the way through stock I0 and passage 18 in turn connects to theyalve by passages 19, 89 (see Figs. 1, 3 and 5). Valve 'I6 has a pair of spaced circumferential grooves 16a., 1617 in its cylindrical surface.

to connect passages 19and 8| at one position of the valve and to disconnect them at a second position thereof, and groove 1Gb extends through an adjoining quadrant of the valve so as to disconnect passages 88 and 82-at said iirst position of the valve and to connect them at said second position, and in an intermediate position grooves 16a16b do not connect passages 8| and' 82 with the inlet ports 19, 80, respectively, but by rotation of valve 16 in a clockwise direction as seen in Fig. 1, passage 19, is connected with port 8| through groove 16a while groove 16h remains closed and the draw bar is` rotated in a clockwise direction when looking at it from the left in Fig. 1 to `unscrew rod I5 from the rivet, and b y rotation of valve 16 in the opposite direction to' another position, passage 80 is connected with'port 82 through groove 16h while passage 19 remains closed andthe draw bar is rotated in a counter-clockwise direction.

To hold the vvalve in -neutral position, that is, with grooves 16a and 16h not in communication with inlet ports 19, 80, the inner face of side.

plate I9 is recessed about the spindle of the valve 16, as at 83 (Fig. 5). A pair of arcuate levers 84,

85 are located within the recess and are pivoted on pins 86, 81 on thestock I0 with their concave sides facing each other about the valve spindle. Their opposite ends normally rest against a pin 88 xed to the stock I0. A coil spring 89 has one end fixedto the Ylever 84 and the other end to Groove 16a extends throughout one quadrant of the cylindrical surface so as sioning the spring 89,' the other lever being prevented from movement by the pin 88. Tensioning ofthe spring causes the valve to return to A neutral position when it is released. .A trigger 9| is fixed to valve 16 in a position to be engaged by. the finger of the operator whose hand engages a portion 92 of the stock. l v

` Movement of the trigger 9| toward the stocksurface 92 rotates the draw rod I5 in a clockwise direction to screw it into a rivet and movement away from the stock surface 92 rotatesthe draw rod inthe opposite direction to unscrew the draw rod from therivet.

To provide for regulating the force exerted in upsetting the rivet an adjustable bleeder valve is mountedon the side plate I9 in position to vent that portion of the triangular recess in which pressure is exerted on the vane to upset the rivet. For this purpose a vent opening 93 (see Fig. 10) is formed in the side plate I9 and terminates in a conical valve seat 94. A ball 95 is seated therein and held in place by a iiat ring 96 of spring metal held against the b'all, 'which contacts, it near its rim, the spring ring being loosely`retained about the stud which receives stud 91 screwed into a lthreaded opening in side .plate I9. A graduated dial 98 is'rotatably mounted on the stud 91 and has an annular groove in its under face to clear the disc 96. 'A similar annular groove is provided in the face of the side plate I9 about the stud for the same purpose. A pin 99 projects downwardly from the dial and impinges against the ring 96 depressing the ring locally within the groove. The arrangement is such that as the dial is rotated the pin 99 moves closer or farther away from the valve ball and changes the tension thereon. The dial may be `adjusted to release air at any pressure over` a maximum `desired pressure and the dial maybe set for different pressures by setting it with respect to a.- scale |00 on the side plate I9.

In the embodiment of the invention illustrated in Figs. 13'to 16, a stock |0I is formed with a-grip portion |02 and a cylinder portion |03 ter- V`minating forwardly thereof y in la ange |04 to 1 which plates |05, |06, I 01 comprising a fluid pressure-operated motor housing are held in assembled relation by bolts |08. The grip has a remov-A i able cover plate |09 on the side thereof secured thereto by screws |I0. The ,operating ends of the barrel III.and draw bar II2 are not shown as these are identical with similar parts of the embodiment of Fig. 1. In this embodimentj means Asimilar to that employed in theem- Vbodiment of Fig. 1 are employed for` rotating the draw-bar H2 in either direction. Td this end, plates |05 and |01 are formedwith aligned bearings on the same axis as the cylinder|03 and the .draw-bar I I2 is rotatably mounted iixed to the valve.

drical recess |31 where it Vseated in a cylindrical aperture in the stock and y the head of the draw-barand holds it in the conical seat. The space between pistons |36 and |40 is illled with oil or other relatively yincompressible liquid, as is also cylindrical recess |31,

l ports |39 and the space between the front end of is operated by a lever |2|. A tensionspring |22,

located inl a recess |23 has one end xed to the stock and the other end fixed to a lever |24 that the valve is normally held in the position illustrated in Figs.` 13, and 15, that is; with the lever |2| pulled up to its elevated positionby spring |22. In this position, a groove |25 in the valve extending approximately 270 around the periphery of the valvel provides communication between passage ||0 and a passage |26 at 90 thereto in the stock which` passage |26 is centrally located in the stock and is connected by a cross passage |26a through the stock with a branch passage |26b parallel to and at one side of passage |26 and with a second branch passage -|26c parallel to and located on the opposite side ofpassage |26 and each communicating with a groove in a second rotary valve |21. Valve |21 is seated ina cylindrical opening through they stock and is arranged to supply air from passage ||9 sequentially through groove |25, passages |26,A |26a, |26b and one of the vgrooves in valves |21, or throlgh groove |25, passages |26, |26a, |26c to the/l the valve |21 and thence to one of two ports |5|, |52 communicating through the stock and plate |01 with the spaces at each side of the bite of the gears ||3 and ||6. Valve |21 is identical with the valve 16 of Fig. 1 and has similar means for holding it in neutral`position. It is controlled by a trigger lever |28 which may be moved to two4 operating positions whereby air is alterl nately supplied to drive the gears in either direction. Exhaust ports |29, |30, |3|, |32 are formed through the plate |06 for escape'of air from the gear chamber. The arrangement is such that when the trigger 28 is moved toward the grip portion |02 air is delivered to the right lside of the gears as seen in Fig. 14 causing the gear attachedto rod ||2 to rotate in a counter-clockwise direction, and when the trigger is moved in the opposite direction air is delivered to the left side of the gears causing said gear attached to rod ||2 to rotate in a clockwise direction.

For operating the draw-bar to upset the tubular rivet, a piston |33 is. slidably iitted in the cylinder |03, ancup gasket |34 being attached thereto by a screw |35 to prevent leakage. A second piston |36 is mounted inthe same cyl- The arrangement is such other of 'saidgrooves in inder and has ar cylindrical recess |31 formedl cylinder |03 and about the ram |38 and is urged from the recess |31' to the cylinder |03 in front of the piston |36. A' third piston L40 of annular form its within the toward the piston |36 by a compression coil spring |4| having a bearing on piston |33. A compression coil spring |42 is seated at one end in a cavity in ram |38 and extends into cylinencompasses a plunger |43. Piston |36 has a central bore through which the draw-bar ||2 `slitlably extends. The draw-barbas aV head' |44 thereon which ilts a conical seat in piston 36. Plunger |43 carries cylinder |36 and the front end of cylinder |03. A port |45 in the rear of cylinder |03 supplies air or other fluid under pressure from valve |20 when the valve lever |2| is depressed, but in the normal position of the valve lever shown in Fig. 13 the chamber to the rear of piston |33 connects through a circumferential groove y|2lla of the valve with the atmosphere through a port |50'l in the stock. When such uid -is admitted behind the piston. |33, `that piston is driven forward and the ram |33 enters recess |31l where it forces the liquid through apertures |39 to the space to the left of piston |36 in Fig. 16, where the liquid forces the piston and draw-bar to the right. As the piston area. of piston |36 is greater than the area of the ram |38 theforce tending to withdraw the draw-bar is greater than the force tending to advance piston |33. During the drawing movement of the draw-bar ||2 lthe spring |42 is placed under compression and when the air is exhausted from the cylinder, the spring returns the pistons and the draw-bar to their original positions. The pistonv |40 assistsin supporting the. ram |38 concentric with the recess |31 and keeps the recess constantly supplied with oil even though some oil may leak out past the pistons. The draw-bar passes through a stuiling box |46 having a 'packing |41 v for sealing th'e joint against oil leakage. i Y

Ineither of the embodiments of theinvention, all operations o'fsetting the rivet may be accomplished by pressureiluid from a single source, requiring only one pressure uid supply line, `and adequate pressure `for upsetting the rivets is attained while rotation of the draw-rod for enter ing it in and removing it from the threaded portion of the rivet is accomplished without use of such force as might strip the threads or otherwise injure the rivets. The application of power to all steps of securing the rivet relieves the operator from excessive physical exertion and the entire apparatus is convenient and simple to operate..

The operation of the apparatus of Figs. 1 to 12 is as follows: With the elements related as in Figs. land 3, that is, with the chamber at the left of vane 39 connected to exhaust through passages 52, 53a, 55, 56, 4| c, and50 and with the chamber at the right of vane 39 connected to the pressure fluid supply through passages 43, 44, 46, 45, 49, 4|b, and 5|, the operator holds the stock in his righthand, his iingers, with the ex- Y ception of the index finger, grasping the surface 92. The index linger engages the trigger 9|. T/he rivet is held in the left hand and is held with its threaded aperture against the draw rod |3. 'I'he thumb of the right hand is used to depress valve lever 51 when a rivet is to be collapsed. With the rivet against the draw rod, trigger 9|, is moved toward' the surface 92 and compressed" air from connection. 42 passes sequentially through passages 43, 44, 11, 18, 80, 16h, y82, 620,15 y and 1| and thus is directed to the motor gears 31, 63 ina direction to rotate the draw rod and 'screw it into the rivet. As the rivetreaches' the Y anvil it can go no further and-trigger 9| is rerod, is then entered in the work and valve lever 51 is then depressed by the thumb to the dot and dash position of Fig. 3, whereupon the cross portion of groove 4|c is disconnected from exhaust port 50 and groove 4Ib is shifted 'to shut port 5I off from port 49 and open port 5| to the atmosphere through port 50 and to bring cross passage piston-vane 39 as seen in Fig. 1, while the pres-l sure on the leftl side or driving face of said piston-vane 39 is relieved by groove 4|a having moved out of engagement withiports 49 and 56, thus cutting oi the rlow of compressed air to said driving face, and by the cross portion of groove 4|c having been established in engagement with exhaust port 50 to exhaust air from said left side sequentially through passages 52, 53a, 55, 56, 4Ic, and 50, and the draw rod I5 returns to the position of Fig. l. from surface 92 to admit air sequentially from passages 43, 44, 11, 18, 19, 16a, 8|, 8|a, 14, 10 and thus rotate the rod I5 in a direction to unscrew the rod from the collapsed rivet after which the trigger is released and returned to its neutral position by spring 89. The mechanism is then back in the relationship shown in Figs. 'l and 3 and is ready for another cycle.

In operating the form of the invention shown in Figs. l3 to 16 the stock grip |02 is gripped in the right hand with the index finger on the lever |28 and the rivet is hld in the left hand against the threaded draw rod. Air is supplied through connection ||8 and passages I I8 in the stock and draw rod to rotate in a direction to screw it into the-rivet. Trigger |28 is released when the draw Trigger 9| is then pushed away rod stops turning because rivet A1 has lencountered .the anvil I4. Lever I2I is now depressed against springY |22 and air is admitted by valve |20 through groove |25 and port |45 to the rear end of cylinder |03 causing piston |33 to move forward driving ram |38 into recess I 31 which shuts off any ow of oil to the right of piston |36 as seen inFig. 16 and forces oil through apertures |39` into the forward end of cylinder |03 against piston |36 which draws draw rod I5 through anvil I4 collapsing the rivet. After c ollapse of the rivet, lever I2I is released and is returned byspring |22 to its normal position, shown in Fig. 13, in which port running to cylinder |03 is opened to exhaust through passage I`20a and port and springs I4| reacting against end |44 of rod ||2 moves the stock |02 and nose I4 away from the work until the parts are reestabf lished in the relationship shown in Figure 16, thus releasing tension on the draw rod. Trigger |28 is then moved away from the grip and admits'fair to the geared motor to rotatev the draw rod in a direction to unscrew the draw rod from the collapsed rivet.

In the operation of either formof apparatus the direction of rotation of the draw rod would be the reverse with rivets and draw rods havin'g 75 left hand threads, and left hand tools maybe made, for operation by left handed people.

Variations maybe made without departing from the scope of the invention as it is dened by the following claims'.

vI claim: A

1. Apparatus for installing internally threaded tubular rivets, said apparatus comprising an anvil adapted to be pressed against the rivet, a threaded rod adapted to extend through and beyond said anvil to' engage the threaded portion .of rivets in succession, fluid-pressure responsive Y means for eiecting relative longitudinal moverespect to said anvil for upsetting a rivet, said meanscomprising a fluid pressure chamber and a piston member therein, uid pressure responsive means for rotating said rod to engage and disengage a rivet, a single source of pressure fluid for both said responsive means, and valve means for initiating and terminating the application of fluid pressure to said responsive means.

3. Apparatus for installing internally threaded tubular rivets, said apparatus comprising a portable stock, a single source of pressure uid connected thereto. an' anvil adapted to be pressed against a-rivet, a rotatable threaded draw-rod extending through said anvil 'to engage the threaded portions of a plurality of rivets in succession and adapted to be reciprocated with respect to said anvil, a fluid-pressure operated motor on said stock for rotating said draw-rodin either direction to engage or release a rivet, a

second uid-pressure operated motor on said' stock for reciprocating said draw-rod tox collapse a rivet, and valve means on said stock for initiating, and terminating the application of pressurefluid to said motors` from said single lsource of pressure uid.

4. Apparatus for installing tubular rivets, saidy apparatus comprising a draw rod having a threaded end for engaging an internally threaded rivet, an apertured anvil through which the draw rod extends, means for manipulating said draw rod including means for imparting longitudinal movement to the rod and means for rotating the rod, power means for driving said manipulating means, and manually-operable means for initiating operation of said power means.

5. Apparatus for installing internally threaded tubular rivets, said'apparatus 'comprising an anvil, a threaded draw-rod extending through and beyond the anvil and adapted to engage in the threaded portion of the rivet, 4luid-pressure responsive means for eiecting a relative longitudinal movement `between the draw-rod and the anvil to upsetfthe rivet, fluid-pressureresponsive means for effecting a rotary movement of the draw rod Yto release the rivet, and means for effecting successive operation of said fluid-pressure tured reaction member, adraw rod extending,

` yond the anvil and adapted to engage the threads in the rivet, power-operated means for effecting a longitudinal movement of the draw-rod to ing the draw-rod to its advanced position through the anvil, power-operated means for rotating the draw-rod to release the rivet and means associated with said stock for initiating and terminating the movements of all said power-operated means.

8. A fluid operated tool for installing internally threaded tubular rivets comprising a stock adapted to be grasped by the operator a barrel extending therefrom and supporting a hollow anvil to be pressed against the rivet, a drawrod extending through said barrel and anvil and adapted to engage in the threaded portion of the rivet, fluid-pressure operated means in.saidstock for 'effecting longitudinal movement of said draw-rod to collapse the rivet, and fluid-pressure operated means in said stock for effecting a rotative movement of the draw-rod to engage and disengage the rod with respect to the rivet, said stock having valve means for initiating and terminating said movements of the draw-rod.

9. Apparatus for installing a rivet, said apparatus comprising anvil means for pressing against a rivet, a draw-rod extending through and beyond said anvil means for engaging a rivet to collapse the same, andpoWer-operated means for manipulating the draw-rod, said power-operated means comprising control means for initiating and terminating the application. of power by said .power-operated means to said draw-rod to mpart movement to the latter for engaging the same with the rivet, and additional control means for initiating and terminating the application of power by said power operated means to said 'draw-rod to retract the same Afor imparting a collapsing force to the rivet against the anvil means.

10. Apparatusfor installing a rivet, said ap- `against a rivet, a housing structure including a barrel and a stock depending therefrom,'a threaded draw-rod extending through said barrel and said rod in adirection to engage the rivet and. in a direction to disengage the rivet, valve means in saidhousing structure for connecting said duid-pressure motor to a source of fluid-pressure, a fluid-pressure cylinder in said housing structure having movable means therein for retractcollapse the rivet, power-operated means for urging and advancing said draw-rodto collapse the rivet, and additional valvemeans in said housing structure for connecting said cylinder to said source of duid-pressure.

12. Apparatus for installing collapsible internally threaded tubular rivets, said apparatus comprising means for applying areactive force to the rivet, a draw-rod extending through and beyond said means and having means adapted to power-operated means.

engage the threads of a plurality' of rivets successively, power-operated means for Ieilecting a longitudinal movement of the draw-rod with respect to the rst said means to collapse each rivet, power-operated .means for releasing the draw-rod from each rivet, and means for initiating and terminating the operation of said poweroperated means.

13. Apparatus for installing internally threaded tubular rivets, said apparatus comprising an anvil adapted to bear against a rivet, a threaded draw-rod extending through and beyond the anvil and adapted to engage the threads in the rivet, power-operated means for eiecting a lon- -14. Apparatus for installing ing a housing having an anvil at one end, adrawparatus comprising anvilmeans for pressing against a rivet, a threaded draw-rod extending through and beyond said anvil means; for engaging the rivet to collapse the same, and poweri the latter for engaging and disengaging the same with the rivet, an'd additional control means-for initiating and terminating the application of power by said power-operated means to said draw-rod to retract the same for imparting a the rivet against the anvil l1. Apparatus for installing a rivet, said apparatuseomprising anvill means for pressing rod in the housing and extendingthrough and beyond the anvil and adapted to engage the threaded portion of the rivet, means in said housing urging the rod to its advanced position.

through the an`vi1, poweroperated means associated with said housing and rod for effecting a longitudinal movement `of the rod with respect to the anvil to collapse the rivet, and poweroperated means for rotating the rod with relation to the rivet. l

` 15. Apparatus -for installing internally threaded tubular rivets, said apparatus comprising an anvil adapted to bear against a rivet, a threaded draw-rod extending through f and beyond the anvil and adapted to engagein the threaded portion of the rivet, power-operated means for effecting alongitudinal movement of the drawed tubular rivets, said apparatus comprising an anvil adapted to bear against a rivet, a threaded draw-rod extending through and beyond the anvil and adapted to engage in the threaded portion ofthe rivet, fluid-pressure Aoperated means f for effecting a longitudinal movement -ot the draw-rod with respect to the anvil' to collapse the rivet, and a pressurer regulating valve for regulating' the force exerted by the-draw-md.

17. Apparatus for installinginternally threadan internally'` threaded tubular rivet, said apparatus .compris-l effecting a rotary-movement of the draw-rod to release the rivet.

18. Apparatus for installing internally threaded tubular rivets, `said apparatus comprising an anvil adapted to bear against a rivet, a threaded draw-rod extending through and beyond the anvil and adapted to engage in the threaded portion of the rivet, a, fluid-pressure operated means for eiecting a longitudinal movement of the draw-rod with respect to the anvil in alternate directions, and uuid-pressure operated means for effecting a rotary movement of the draw-rod.

19. Apparatus for installing internally threaded tubular rivets, said apparatus comprising an anvil adapted to bear against a rivet, a threaded draw-rod extending through and beyond the anvil and adapted to enga-ge in the threaded portion of the rivet, a uid-pressure operatedmeans for ecting a longitudinaI movement of the drawrod with respect to the anvil, and fluid-pressure voperated means for effecting a rotary movement of the draw-rod in alternate directions.

20. A fluid-pressure operated tool for installing internally threaded tubular rivets comprising a stock adapted to be grasped by the operator, a. barrel extending therefrom and supporting a hollow anvil adapted to bear against a rivet, a draw-rod extending through said barrel and anvil and adapted to engage in the threaded portion of the rivet, fluid-pressure operated means in said stock for effecting longitudinal movement of said draw-rod to collapse the rivet,

and uid-pressure operated means in said stock -V for eiecting a rotative movement of the draw.-

rod to engage and ldisengage the rod with respect to the rivet.'

21. A fluid-pressure operated tool for installing l internally threaded tubular rivets comprising a stock adapted to] be grasped by the operator, a barrel extending therefrom and supporting a hollow anvil adapted tobear against a rivet, a drawrod extending through said barrel and anvil and adapted to engage in the threaded portion of the rivet, fluid-pressure operated means in said stock for effecting longitudinal movement of said draw-rod and for .eiecting a rotative move-I ment of the draw-rod to engage and disngage the rod with respect to the rivet, said stock comprising means for regulating the force exerted Y by the draw-rod.

22. Apparatus for installing tubular rivets, said apparatus comprising a stock having an apertured reaction member,` a draw-rod. extending through the aperture in said member and having a threaded end for engaging an internally threaded rivet, power-operated means in said stock for effecting relative movement `between said rod and said member including means for effectingv a relative longitudinal movement. between said rod and said reaction member, means for rotating the rod, and manually operable means associated with said stock for initiating operationvof the power-operated means. r

23. Apparatus for installing internally threaded tubular rivets, said apparatus comprising an anvil adapted to bear against a rivet, a threaded draw-rod extending througli and beyond the anvil and adapted to engage the threads in the rivet, power-operated means foreiecting a longitudinal movement of the draw-rod to collapse the rivet, spring means for urging the draw-rod to its advanced position vthrough the anvil, andV power-operated means fol-rotating the drawrod to release the rivet. y

' "CHARLES C. CADDEN. f

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