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Патент USA US2403675

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July 9, 1946.
w. G. MITCHELL
2,403,675'
TOOL FOR INSTALLING TUBULAR RIVETS.
Filéd June 11, 1945
3 Sheets-Sheet 1
July 9, 1946.
w. G. MITCHELL _
TOOL yFOR INSÍALLING TUBULAR RIVETS
Filed Jup? 11, 1943
3 Sheets-Sheet 2
507697
uw
v 2,403,675
13
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-JNVENTOR.
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July 9, 1946-
w. G.' MITCHELL
’
¿4032675
TOOL FOR INSTALLING l'ÍL‘UBULÀR RIVETS
'
_Filed June,11, 1943
s sheets-sheet :s
' ATroR/vfx
.Patented July 9,
’ 2,403,675
'UNITED STATI-:s PATENT OFFICE '
TOOL FOR INSTALLING TUBULAR RIVETS
Walter George Mitchell, Aurora,- Ill., asslgnor to
Independent Pneumatic Tool Company, Chi
cago, Ill., a corporation of Delaware .
Application June 11, 1943, serial No. 490,546 '
~
`
22 Claims.
(C1. 21a-19)
‘ 2
l
to control the amount of set or compression to
be given to the rivet in upsetting or collapsing
the same; and
To provide an interconnection between the an
vil and the lever of the riveting stroke producing
mechanism of the tool to prevent rotation of the
This invention relates to power operated tools
for installing internally threaded tubular rivets
for blind riveting operations in airplane and other
work.
-
_
The principal object and purpose of my inven
tion is to provide a simple and eiiective portable
anvil with respect to the rivet.
power operated hand manipulated tool for in- ~
-
The invention consists further in the features
of structure hereinafter described and claimed.
In the accompanying drawings
To provide a tool construction in which- the 10
Fig. 1 is a longitudinal sectional view with
action and reaction members are in the form of
parts in elevation of a riveting tool constructed
relatively movable anvil and rotary spindle ele
in accordance with my invention;
ments, respectively, mounted on the tool support,
Fig. 2 is a cross-sectional view taken on line
the spindle having a swiveled connection with
.
the tooly support for rotation to engage and dis 15 2-2 of Fig. 1;
Fig. 2A is a. sectional ,view taken on line 2A-2A
engage the threaded portion of the rivet and
of Fig. 1 to show details of construction to be later
nxed against endwise movement with respect to
stalling these tubular rivets, the invention having
among its specific objects the following:
/
the tool support, whereby pressing the anvil out
described;
‘
Fig. 3 is a cross-sectional view with parts in
the tool when engaged against the rivet in the 20 elevation taken on line 3--3 of Fig. 1 to show the
actuating mechanism for the rotary control valve
work imparts movement to the spindle and the
of the tool;
`
support relatively to the anvil to collapse or up
Fig. 4 is an end view of said control valve to
set the rivet engaged by the spindle; '
show the ratchet arrangement thereon;
To provide a tool structure in which> the power
Fig.- 5 is a sectional View taken on the lcurved
operated motor means employed for respectively 25
line 5--5 of Fig. 4 to show the step-shaped grooves
rotating the spindle and pressing the anvil out
and the spring biased plunger engageable there
wardly of the tool support against the rivet are
with;
selectively controlled by a single control means
Fig. 6 is .a cross-sectional view taken on line
operable by the operator holding the tool to sim
wardly of the tool support by the power means of -
plify and facilitate the handling and manipula
tion of the tool;
30
6--6 of Fig. 3, part of the 'actuating trigger lever
being indicated in broken lines;
Fig. 7 is a longitudinal sectional view with parts
To provide the control means in the form of a
in .elevation showing the spindle in engagement
single rotary member movable into a number
with the threaded portion of the tubular rivet
of successive rotative positions to control the op
eration of the tool motors in the desired cycle, 35 in the first step of connecting these parts;
Fig. 8 is a similar view of the same parts show- .
to wit, to rotate the spindle to engage the rivet,
ing the rivet after being collapsed or upset by
topress the anvil against the rivet in the rivet
the tool;
.
ing stroke of the tool, and thereafter rotate the
Fig. 9 is a vsectional view of a detail of con
spindle in reverse to release the spindle from the
collapsed rivet and return the power means to 40 struction to be hereinafter described;
Fig. 10 is a cross-sectional view taken on line
the start of the riveting stroke;
lll-_I0 of Fig. 9;
To provide the control means with a single ac
Fig. 11 is a side view of the bushing for the
tuating lever which by a ratchet or equivalent
rotary control valve;
mechanism enables the control member to be
turned through said respective .rotative positions 45 Fig. 12 is a diagrammatic view indicating the
passage arrangement in the tool construction for
in the successive operations of the lever;
connecting the two pressure fluid responsive mo
-To provide a signal device in the tool structure
for indicating~ to the operator when> the riveting
stroke of the tool has been completed;
tors through the control valve; and
'
y
the riveting stroke of the tool may be adjusted
preferably in the form of a casting shaped to
Figs, 13 to 16 inclusive are diagrammatic views
To provide a switch mechanism for the signal y50 illustrating the‘various rotative positions of the
control valve in supplying pressure ñuid to the
device and which switch mechanism is operable
respective tool motors in the operation of the tool.
in the riveting _stroke of the tool at the terminus
In the tool structure shown in the drawings,
thereof;
ì
.
' I~indicates the frame or main support of the tool
To provide an adjustment in the tool whereby
r
2,4.os,svs
3
provide a pistol grip type of handle 2 an'd a
section 3 to house and mount the two motor ele
ments 4, 5 of the tool. 'I'hese motor elements 4.
5 are arranged one above the other in parallel
and both in the _embodiment shown are pneu
matically operated. The upper motor element 4
screwed on the spindle‘is drawn against'the an
vil
.
.
‘
The rotor 23 has shaft extensions 24, 24 at its
opposite ends and these extensions serve to mount
the rotor in ball bearing units 25, 25 incorpo
which is of the rotary type is divided from the
rated in the motor structure as shown in Fig. 1.
'I'he motor has end. plates 26, 2l at the respective
lower motor element >Fs lwhich is of the» recipro
cable type by a wall section 6 providing a part of
the frame casting as shown in Fig. 1. The live
bearings and these end plates complete the motor
cylinder as _shown in Fig. 1. As there illustrated,
the end plates have a doweled connection with
ñ or compressed air required to operate the motor
elements is supplied thereto under the control
of a manually operable control valve l. rotatably
mounted within the handle 2 below the lower
motor element 5. The handle 2 is provided with
an air supply passage 8 having a tapped opening
9 at the lower or butt end of the handle for con
nection with an air supply hose (not shown).
The handle member 2 has a chamber I0 provid
the intervening cylinder element I3.
'
Located within the housing I2 is a’rivet en
gaging spindle or action member 21 slidably
mounted at its forward end within the anvil I3
and connected `at its inner end with the rotor 2li
for rotation thereby. In the embodiment’shown,
this connection is made through a' reducing gear
drive 23 of the planetary type. The sun gear
of this drive comprises gear teeth on the adjacent
ing a reservoir from which a lubricating oil is fed 20 shaft extension 24 of the rotor 20 and planet
into the air stream in the passage 8 through an
gears 23, 23 on a carrier 30„the planets 23 mesh
oil feed regulator (not shown) mounted in a re
ing with the sun gear and the internal teeth ci' a
ring gear 3| of the drive as shown in'Fig. 1._ The
cess II in the handle wall which divides the air
passage 8 from the reservoir chamber IIJ as shown
carrier 30 has a hub portion 321with which the
in Fig. 1.
inner end of the spindle 21 is connected for direct
Bolted or otherwise rigidly secured to the front
side of the frame section 3 is a tubular housing
I2 enclosing theV operative parts of the machine
'rotation thereby. This connection comprises a l
non-circular:head 33 at the inner end of the '
spindle fitting in a complementary shaped recess
in the hub section 32 and clamped therein by a
on the front side of the frame and mounting a
reaction member or anvil I3 at the extreme front 30 clamp nut 34 through which the spindle extends.
end of the tool. The anvil I3 is cylindric in form
_The motor assembly 4 and its drive 25‘are locked '
in place within the handle section 3 against
and has a sliding ñt within a sleeve I4 which has
shoulders therein by a nut-element 25a screwed
a screw threaded connection with a bushing I5
into the handle section at the rear end of the
fitted within a bore at the front end of the hous
ing I2 .as-.shown herein. A spring ‘biased detent 35 tool. ‘ This arrangement holds the spindle 2l»
pin I6 carried by the housing I2 and extending
through the bushing I5` engages the sleeve I4 at
against endwise movement within the tool case,
providing, however, a swiveled connection of the
a circle of teeth I1 thereon for holding the sleeve
I4 against accidental turning. A helical spring
spindle with the tool support.
-
The motor element 5 is of the reciprocating type »
I8 normally urges the anvil inwardly, said spring 40 having a cylinder'> 35 and a contained piston 35.. '
The l-atter'is-secured-to a piston'rod 31 which
surrounding the anvil within the sleeve I4 and
extends into -the housing I2 ‘throughvthe A'i'ront
bearing against shoulders on said respective parts.
header 33 of the cylinder 35, said'header con
The motor element 4 is of the rotary type hav
stituting an mtegralwall portion of the frame
ing a cylinder I9 fixed against rotation within the
frame section 3 and a rotor 20 eccentrically 45 casting Iy as shown herein. Theopposite or rear
end of the cylinder as is closed by a cap elementv Y.
mounted within the cylinder I9 as shown in Fig.
, 12./ The rotor 20 contacts with the cylinder I3
at one point only in its vcircumference to divide
the cylinder into two crescent 'shaped/chambers
- 39, which also closes the mounting for the motor
. >element '4. secured in place by bolts or screws 43 f `
as indicated inFig. 1. «
,
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.
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which co-operate with radial ,blades 2'I` slidably
Located .within the housing. I2 is a‘power actu
carried by the rotor in slots therein as invmotory
structures of this general type. The-'crescent
between integral’lug elements 43, '43 'cast integral
ated lever 4I fulcrumed at 42 on the housing I2 - '
shaped'chambers provide for the expansion and -' _with the housing'` adjacentto its front end. The
exhaust, respectively, of the live air'- suppliedto
the motor 4 and _control its rotation. in reverse di-v
rections.
`
Th'e ports for admitting and exhausting pres
sure fiuidto and from the rotor cylinder, I9 are
shown at 22, 23, respectively,- mrig. 12.- when
the rotor 20 is rotated towards the right- or clock- f
wise as viewed in Fig. 12. the pressure fluid is
admitted to the port 22 and exhausted at the port ,
23. The rotor is rotated in this righthand direc
tion to screw the spindle or action member to be
later described into _the threaded portion ofthe
tubular rivet to be installed. ` A reverse rotation
of the rotor 20, that is counterclockwise to re
lease the rivet, is accomplished by .admitting
pressure fluid at the port 23 and. exhausting it at
the port 22. This is under the control of the
valve ‘I as will be later described. As will be noted
in Fig. 12, the motor element 4 is of relatively
light power, four blades being employed, so that
lever 4I is comprised of angularly disposed arm
portions 44, 45, the former' extending from the
fulcrum 42 to the powerr delivering end 45 of the
lever 4I and which power delivering end 45 en
gag'es the inner end of the anvil I3 in a slot
therein to be later described. An extension I3c
of anvil ,I3 provides an extended surface to thev _
' bottom of this slot. The arm portionv 45 o! the
lever 4Ijextends rearwardly from the fulcrum 42
and has an underlying cam vsurface ~4'! which in
the normal position of the lever 4I' at the start
of a riveting stroke is in angular relation to the
piston rod 31. The latter. extends between the
lever arm 45 and a co-operating track-way 43
secured by screws 43 to the housing I2 below the
lever arm 45 as shown in Fig. 1.
The piston rod 3_1 carries a driving head 50 at
its outer end between the lever arm 45 and the
track-way 48. Said driving head 50 is bifurcated
having side walls 5I,` 5I between which are jour
naled upper and lower rollers 52, 52 on axis orv
the rotor will stall easily as soon as the rivet being 75 shaft elements 53, 53 as 'shown in Fig. 2.. Said
8,408,076
,
- 5
vIn the normal or starting positional’ the parts
axis elements 5_3 extend through spacer plates
54, 54 located between the side wallsll to hold
asshowninl'lg.1.thevalve1isinitsilrsto?
the rollers 52 in contact with the cam surface
neutral position as detailed in Figs. 12 and 13.
At this time the piston 36 is at the forward end -.
41 and the track-way 46, respectively, and out
of peripheral contact with each other.r The axis 5 of the cylinder 35 and the inlet port 11 in the>
valve bushing» 51 and which port vconnects with
elements 53 extend through vertically elongated
the main supply passage I in the» tool handle 2
slots 55 in the walls 5| of the driving head “to
is closed by‘ the valve body asshown in ‘Figs. 12
and 13-X and 13-C, the latter being taken on
the spacing between the cam surface 41 and the
track-way 49. The shaft elements 53 are locked 10 line C-C 'of Fig. 13--X. 'I'his cutsv oil the iiow
/compensate the roller action to any variation of '
in place and the' lever 4| is provided in its upper
portion with a channel orgroove 56 to accommo
` of uve air to both of the tool 'motors 4„5. , The
driving head 56. on the piston rod I1 is now at_
the end of its stroke nearest tothe fulcrum 42
date the spindle 21 whereby the power delivering
`.end 46 of the lever 4| may straddle the spindle
of the lever` 4| and the spring “has returned
the anvil I3 and the lever'- 4| to their starting
positions as shown in Fig. 1. 'I'he _arm‘portion 45
and apply power approximately along the center
line of the anvil I3.
‘
'
The control valve 1 is in the form of a cylindric '
of the lever 4| is now at an angle or inclination
to the line of movement of-the piston- rod 31 and
the lspindle 21 which extends through an aperture
member rotatably mounted within a comple
mentary' shaped bushing 51 stationarily fitted
within the handle 2 at the location for the valve. 20 in thev anvil Ilhas its threaded outer end 16 pro
jecting beyond the plunger to be engaged with
The forward end of the valve 1 is flanged at 58r
to overlie the adjacent end of the bushing 51 to » the Ythreaded portion 19 of the tubular rivet 86
to be installed and collapsed by the‘tool.
hold the valve in place. This ñange 58 has a
In establishing the foregoing connection, the
complement of peripheral ratchet teeth 59 en
rivet 80 is held by the operator between the fin
gaged by a spring 60 to hold'the- _valve from a
gers of one hand and applied over the threaded
reverse turning. The spring 60 is mounted in
end 18 of the spindle, the latter being inserted
a housing section 6I secured over the front end
into the tubular stem 9| oi' the rivet through its ._
of the valve 1 by one or more screw elements62
as shown in Figs. 1 and 3. This housing section ‘ outer ñanged end I2 until the taigeaded end 16
6| provides a chamber 63 in which the valve 30 of the spindle engages the thre ed portion 19
of the rivet. Now, the operator holding the rivet
iiange 58 and the spring 60 are located. The
front end ofthis chamber is closed by a cover A
plate 64 secured in piace by the screws 62.
Pivoted in the chamber 63 on a pivot pin 65
is trigger lever 66. The latter extends out' of
the chamberv 63 through a slot 61 in the surround
against- turning depresses the trigger lever 66 to
turn 'the valve 1 its first quarter turn into the
position shown in Fig. 14. 'I'his connects the
- >ports 11 and 83 'in the bushing 51 through a recess
84 in the valve member and live air is 'supplied
. to the rotary motorthrough its port 22 to rotate
ing body portion 68 of the housing section 6|.
Beyond the slot 61, the trigger lever 66 has an-
the spindle-21 to screw the same into the thread
ed portion 19 in the tubular rivet. 'I‘he operator
A angular end portion 66a extending alongside the
handle 2 to be within easy access for actuation ,40 holds the rivet until the threaded ' connection
-draws the iianged end 62 ofthe rivet against the
and is provided at its outer end >with a serrated '
thumb piece 69 as shown in broken-lines in Fig. 6.
anvil '|3. The` latter due to its interconnection
With the arrangement disclosed, the _operator
with the lever 4| is held against rotation and the
motor stalls and ceases to revolve when the rivet
holding the tool may conveniently depress the
trigger lever to turn .the valve 1 to its various
positions for supplying pressure iluid to the tool
motors in the sequence required for a rivet in
stalling and compressing operation.
To turn the valve member from the trigger'
' leverl66, I provide a ratchet mechanism compris
' is brought against the anvil Il.
The interconnection just above vmentioned,
comprises the co-action of the sides of the lever
4|> at its power delivering end 45 with the sides
|3a, |3a of a milled slot |317 in the anvil 'I3 at
50 its inner end as detailed in Fig. 2A. As shown in
ing an arm 10 pivoted to the inner end of the
trigger lever and overlying the front end of the
Fig, 1, thebottom of the slot |317 is curved for
valve member within the housing chamber 63.
endV of the anvil
A spring biased plunger 1| is carried at the lower
or free end of the arm 10 and presses against
the front end of the valve member 1 to co-act
with a series of forwardly opening, arcuate guide
grooves 12 as detailed in Figs. 4 and 5. The
grooves 12 are arranged in a circle about the
valve axis and have inclined bottom walls 13
interposed by shoulders 14 both of which provide
ease of movement of the lever against the inner
I3.
'
,
'
'
_When the valve] is in its ñrst and second ro
tative -,positions just above described and 'as shown
in Figs. 13 and 14, the valve body closes the bush
ing port 85 and live air is cut oil.' to the casing
,
passage 66 which connects the bushing port 65
with the forward port 81 at the front end of
60 the cylinder 35. Live air may enter the rear
end of the cylinder 95 from the.bushing port 83
through the rear port 88 in the cylinder and the
interconnected casing passages 89, 96 which con
nect the bushing port 83 with the motor ports 2.2
trigger lever 66. The Ashoulders 14 have a ninetydegree spacing for imparting quarter turns to the 65 and 88, respectively, as shown in Fig. l2. This,
however, does not affect the position of the pis
valve. 'A spring action 15 returns the trigger lever
ton 36 in the cylinder 35 for the reason that said
66 to its starting position and the plunger snaps
a stepped formation for turning `the valve mem
ber 1 by the arm 10 on each depression of the f
over the next shoulder to be engaged. The spring
piston is at the frontendof the cylinder at the
limit of its return stroke. Motor port 23 is con
15 is anchored at its lower end in lthe housing
chamber 63 and is connected at its upper end to 70 nected at this time to the exhaust through bush
ing ports 9|, .92 and the intervening recess 93 in
the trigger‘lever'ßû at a lug 16 thereon. 'The
the valve body 1 as shown in Figs. 13-D andV
circular -sides of .the grooves 12 maintain -the
14-D, respectively. Port '23 is connected with
plunger 1| within the path of the shoulders.
the bushing port 9| by a passage 94 in the tool
The tool structure shown and described oper-v
.
75 casing.
ates as follows:
'
_ 3,403,015
8
After the rivet .80 has7 been engaged with the
unscrewed from the threaded portion 10 of the
spindle 21 and seated against the outer end of
the anvil I0, the rivet is inserted byl the tool
into the registering openings 95 inh the plates o'r
parts 96. 95 to be riveted and clamped together
collapsed rivet andthe -tool is freed for the next
rivet installing operation. The exhaust from the
motor 4 is through the motor port 22,
8_9." bushing ports 00, 02 and valve recess- 04.
Some of this exhaust air which is still under
as shown in Fig. 8. This is done from the ac-v
cessible or outer side ofthe assembled plates, and
the opérator holding the tool presses the flanged
pressure enters the cylinder port 00 through
passage 90 and forces the piston 00 on its forward
or return stroke to the starting position as shown
end 82 of the rivet against the outermost _of said
plates. The latter which constituie the work are 10 in Fig. 1. The spring I8 maintains the lever
4| against the driving head 50 and when the
fixed against movement and resist this pressure.
trigger lever is again depressed to stop the reverse
The operator then depresses'the trigger lever 68
rotation of the motor 4 and the return stroke of
to turn the valve 1 into its third quarter position
the piston. the valve 1 is turned to its starting
as shown in Fig. 15. Now, live air is supplied '
or neutral position as shown in Fig. 13. The tool
to the forward end of the cylinder 00 on the front
is now ready for the next rivet to be installed
side of thetpiston 06 and the piston-is forced
and the operations -just above ldescribed are re- rearwardly on its riveting stroke to 'press the
peated in the order stated.> l
~
lever 4| against the anvil i0 toproiect the latter
Inthediagramsshowninli'igs. 13to18inoutwardly of the tool casing |----|2. This forces
the flanged end of the rivet against the outermost 20 elusive, it may bepointed out that the same pat
tern is followed throughout all of the figures. the
sections being taken on section lines correspond
ing to those marked in'Fig. 13. It also may be
remarked that the trigger lever >00 is depressed
collapse the tubular' stem 8| of the rivet against 25 to its fullest extent oneach valve turning stroke.
the trigger lever being returned to its star-tim
the innermost> of the plates as indicated at' 01
position when released by the spring action here
in Fig. 8. It will be noted that the rivet stem is
of the stationary plates and the resulting action
isA that the tool casing or support |---|2 and the
spindle 21 connected thereto are moved endwise
-ln unison rearwardly in respect to the anvil to
y
collapsed in its portion between the innermost
inbefore mentioned;V
plate 90 and the threaded portion 19 of the rivet
as engaged by the spindle 21. The’riveting pres-.
'I'he signal for the. tool comprises an electric
lamp l90 mounted in theend cap 00 -of the tool
. sure increases gradually as the cam surface 41
in a cavity I“ behind a translucent cover |0|.
The light bulb or the cover or both may be given
' a distinctive color,~for example red, to readily
on the lever `'4| approaches parallelism-with the
>piston rod 31, `the'driving headI 0B being mcrvedv
away from the fulcrum 42> of the lever and its
power delivering end 46 on the riveting stroke.
With the valveY 1 in this third quarter position
as shown in Fig. l5, it will be noted that the
~
call attention thereto whenl lighted. >The lamp
90 is grounded to the metal frame or tool. support
I and isconnected by a wire |02 with adry-cell
battery |00 located in a. chamber |04 provided '
inlet port 11 is now connected with the bushing ' ' 'therefor in the front casing li2 ofthe tool as
port B5 through the connected passages”. 00a,
sembly. This chamber |04 is normally closed by
98h in the valve body as shown in Fig. 15-X and 40 a cover plate |00 fastened> to the tool casing I2
and removable for battery replacement. ‘The
the sectional views Figs. 15A and 15-C. The
battery when inserted in 'the‘chamber |04 has
exhaust from the rear end of the cylinder 35 is '
its rear pole in electrical connection with a con- Y
through the cylinder port 88, casing xpassages
tact ||i6 mounted in an insulator |01 at the rear
90 and 89, and valve lbushing ports 83 and 92 '
which are connected at this time by the port 04 45 end o_f the chamber and in contact with a. spring
biased terminal |040 in an insulating sleeve |00
in the valve member 1 as shown in Fig. 15-B.
and to which terminal the conduction wire |02
Casing passages 90 and 89 are connected with. the'
is connected. 'I'his connection may also be made
port 22 of therotary motor as shown in Fig. 12
by extending the wire |ß2 into the space between
and the exhaust air from the rear end of the cyl~
inder 35 may enter the rotary motor through port so the insulator disc m1 andthe sleeve |00 .and con
necting the wire by a. terminal clip engaged by
22. The rotary motor 20 is, however, at this time
s. screw at the outer end of the contact plug |00.
open to the exhaust port 92 through motor port
Located at the front end of the chamber |04 is a
23, casing passage se, bushing port 9| and valve
telescopic cartridge ||0 of insulating material
port 93 as shown in Fig. l5--D. The alternate
path for the exhaust air precludes the possibility 55 having a contact ||| which is pressed against
the forward terminal || 2 of the battery. '111e
of the pressure being appreciably above atmos
coiled spring ||3 of the cartridge which performs
phcric .pressure and the rotary motor 20 is not
this function seats against a metal cross-pin ||4
turned to effect the screw threaded connection of
at the front end of? the cartridge and which pin
the spindle 21 with the tubular rivet 8|. The
has its opposite ends soldered to a contact ring
bushing port 92 is connected to the atmosphere
|I5 carried by the cartridge in the path of a lug
, through an exhaust outlet (not shown) in the
projection H6 at the inner end of the anvil l0.
tool casing l-3.. When the piston 36 completes
W'hen the parts just above described are in
its rearward or riveting stroke, the operator again
their normal or starting positions as shown in
depressesthe trigger lever 66 to turn the valve
Fig. l, the lug IIS isv out of contact with and
1 into its fourth quarter position as shown in
spaced rearwardly of the contact ring _lli and
Fie. 16.
'
.
.
- When this fourth'quarterposition is reached.
the valve 1 has been turned to cut oif the' flow
of live air to the front end of the cylinder 35 at
the electrical circuit to the lamp 00 is open. 0n
a riveting stroke, when the plate H5 is brought
into contactl with the lug H0, the lamp circuit
. the bushing port lle-as shown in Figs. lS-X and 70 is closed and the lamp is ignited. _This indi
16-A. Inlet port 'il is now connected with the
‘bushing port 9i through valve recess 93 as shown
Cates t0 the operator that the riveting stroke of
the tool is complete and that the rivet hasbeen
collapsed or upset. The operator then depresses
the trigger lever v66 to unscrew the spindle 21
in Figs. lö-X. iii-C and 1li-_D and live air is
supplied to the rot
motor port 23. The rotor
is now rotated in reverse andthe spindle 21 is 75 from the rivet. It is to be understood, that the
l. 2,403,675
anvil I3 is of metal to complete the lamp circuit
when the contacts IIS, IIB are engaged.A
The sleeve Il and the bushing I5 provide an
adjustable mounting in the tool support so that
the riveting stroke of the tool may be‘adjústed
to determine the amount of set or compression
given to thel rivet in upsetting the same. .This
provides for proper upsetting of Ithe rivets to
having a swiveled connection with the support y
and iixed against endwise movement with respect
thereto, said spindle extending through the
` anvil and having a threaded outer end foren
gagement with the threaded portion of the rivet,
two motor means in the support, one for rotat
, ing the spindle for engaging and disengaging vthe
or cracking of the .folded metal in the upset por
same ywith respect to the rivet, and the other
for projecting the anvil outwardly relatively to
the support for collapsing the rivet engagedA by
tion 91 of the rivet from an excess of pressure
from a longer than desired riveting stroke, this
ation of said respective motor means.
clamp'the plates together and avoids checking
the spindle, and means for controlling the oper-- "
~
being essential because the upsetting action takes
3. A tool for installing internally threaded
place on the inner side of the plates and is not
tubular rivets, said tool comprising a support,
an anvil relatively slidably mounted in the sup
port for engaging the rivet, a rotary spindle
having a -swiveled connection with the support
and fixed against endwise movement -with respect
visible to the operator in these blind riveting
operations. The adjustment- is made by screwing
the sleeve I4 inwardly or outwardly to lengthen
or shorten ‘the riveting stroke.
’I'he length of
thereto, said spindle extending through the anvil
the stroke is controlled by the spacing between
the inner end of the sleeve Il and the lug IIB at
the inner end of the plunger I3. Hence, by vary
ing this spacing, the extent to which the lever 4I
and having a threaded outer end for engagement
with the threaded portion of the rivet, a lever
fulcrumed in the support, _and means in the sup
port for rotating the spindle 'and other means for
must be moved to upset a rivetmay be controlled.
To facilitate turning the sleeve I4 for adjustment,
its outer end Ita is fashioned to be engaged by
pressing the lever against the. anvil for respec~tively engaging and disengaging` the spindle with
respect to the rivet and projecting the anvil
a wrench or other turning instrument. ’I‘he
sleeve I4 is made accessible for this purpose on
unscrewing the cover cap I2a from the front end
of the tool housing I2.
»
outwardly relatively to the support for collapsing
the rivet engaged by the spindle.
4. A tool for installing internally threaded_
tubular rivets, said tool comprising a support,
an anvil relatively slidably mounted in the sup
port for engaging the rivet, a rotary spindle hav
,
In all instances of anvil adjustment, the lamp
circuit contacts H5, H6 follow the same spacing
whereby the signal will go on at the terminus of
the rivet-ing stroke. This follows from the fact
that the headed end 'H1 vof the movable member
I I 8 of the cartridge H0 follows valong with the
sleeve I4 in adjusting the same. Failure of the
lamp to ignite on a riveting stroke prompts the
opera-tor to hol-d the tool against the rivet until
the lamp signals a completion o_f the riveting
stroke. This insures properand effective riveting operations which in these blind riveting con
ditions are not visible to the operator.
The riveting tool of my invention is simple'
in constructionv and operation- and effective in
ing a swiveled connection with the support and
iixed against endwise movement with respect
thereto, said spindle extending through the anvil
and having a threaded outer end for engage
ment 'with the threaded vportion of the'rivet,
a lever fulcrumed on the support and having a y
cam surface at its power receiving end, and two v
power actuated means in the support, one for
rotating the spindle and the other acting on
the cam surface lof the lever for respectively
engaging and disengaging the spindle with re;
>spect to the rivet and pressing the lever against
the anvil for projecting the same outwardly rel
installing and compressing these tubular rivets.
'I'he tool provides ample power for the upsetting
operation and added to tlhis is the important fac
.tor of having a single control for operating both
of the tool motors, whereby the manipulation of
' atively to the support to collapse the rivet en-'
gaged by the spindle.
an anvil relatively slidably mounted in said sup
port for engaging the rivet, a rotary spindle hav
ing a> swiveled connection with the support and
i'lxed against endwise movement with respect
The details of construction and arrangement
ofparts shown 'and described may be variously
changed and modifled without departing ’from the
spirit and scope of my invention, except as point
I claim as my invention:
~
,
,
,
tubular rivets, said tool comprising a support, _
the y,tool is materially simpliñed.
ed out in the annexed claims.
_
5. VA tool for installing internally threaded
thereto, said spindle extending through the anvil
55 and having a threaded outer end for engagement
with the .threaded portion of the rivet, a lever
fulcrumed on the support and having` a cam
v1. A tool for installing internallyl threaded tu
bular rivets, said tool comprising a support, an
.surface at its power receiving end, a reciprocable
-driving element in the support and acting on
anvil relatively slidably mounted in the support
for engaging the rivet, a rotary spindle having
the cam surface of the lever for pressing the
lever against the anvil for projecting the same
«a swiveled connection with the support and i‘lxedv
outwardly relatively to the support to collapse
against endwise movement with respect thereto,
said spindle extending through the anvil and
the rivet engaged by the spindle, 4and two power
operated means in the support, one for recipro
having a threaded outer end for engagement with
the threaded portion of the rivet, and means in 65 cating the driving -element and the other forrotating the spindle with respect to the rivet.
the support for rotating the spindle and other
means for projecting the anvil outwardly rela
6. A tool for installing internally threaded
tively to the support for vrespectively engaging
tubular rivets, said tool comprising a support,
and disengaging the spindle with respect to the
an anvil relatively slidably mounted in the sup
rivet and collapsing the rivet engaged by the 70 port for engaging thexrivet, a rotary spindle hav
spindle.
‘
ing a swiveled connection with the support and
-2. A tool for installing internally threaded I
tubular rivets, said tool comprising a support,
an anvil relatively slidably mounted in the sup
fixed against endwise movement with respect
thereto, said spindle extending through the anvil
and having a threaded outer end for engagement
port for engaging the rivet, a rotary spindle 75 with. the threaded portion of the rivet, a lever ful
:recaen
,
. s .
in
« 12
A
crumedon the support and having av cam surface
relatively movable anvil and rotary spindle ele
at 'its power vreceiving end, a track-way on the
support in .opposition to said cam surface, a-
ments -mounted -in the support. said spindle ex
operated means in the support, one for recipro-'
therefor in rthe support, comprising - separable
cating the driving- head and-the other for rotat
_ing the spindle to engage and disengage the same
the anvil, respectively, for closing the signal cir
tending through the anviland having a'threaded
outer end for engagement with the threaded por
lreciprocable driving head in the support inter
posedbetween and acting on the track~way and ci tion of -the rivet, power actuated meansy in the
support for imparting relatively endwise move
the cam surface, respectively, when moved there
lment tothe anvil and the spindle for collapsing
along >away from the fulcrum for pressing the
the rivet engaged by the spindle, other means for
lever against the anvil to project the same out
rotating the spindle with respectl to the rivet, and
wardly relatively to the support to collapse the
rivet engaged by the spindle, and two power 10 an electrical signal and ajswitch and circuit
with respect to the rivet.
_
.
7. A tool i'or` installing internally threaded 15
contactsfin the signal circuit on the support and
cuit at the terminus of the riveting stroke of the
tool.
.
l2. A tool for installing internally threaded
tubular rivets, said tool comprising a support,
relatively movable anvil‘and rotary spindle ele
mounted in said support, the action member. `be
ments mounted `in the support, said spindle ex
- ing in the form of a rotary, spindle-having a
threaded outer end for engagement with. the 20 tending through the anvil and having a threaded
outer end for engagement with-the threaded por
threaded portion ofthe rivet, and means in the
tion oi’ the rivet, power 4operated means in the
support for rotating the spindle with respect to
vsupportior rotating thespindle with'respect to
the rivet and other means for collapsing the rivet
the rivet and other means ioré‘collapsing the rivet
engaged bythe spindle -by pressing on the re
action member to move the-spindle and. the sup 2.5 engaged by the spindle-:by imparting relative
endwise movement to the anvil and the spindle
port relatively thereto.
»
in the riveting stroke of _the tool, and means pro
8. A tool for installing internally "threaded
Aviding a mounting `iîor the anvil in the support
tubular rivets,-said tool comprising a' support,
tubular rivets,` said tool comprising a support,
relatively movable action and reaction members
relatively movable action- and> reaction members
comprising a sleeve threadedly connected there
being ~in the form v of Aa' rotary- spindIehaVing
a threaded outer end for engagement with the
said sleeve acting for adjusting the length of said
sîrotke to determine the set to be given to the
threaded -portion-oit the rivet, two pressure iluid
r ve .
>mounted in said support, the action vmember 30 withand housing a spring acting on the anvil,
responsive means in the support, one for rotat
ing the spindle Vwith respect to the rivet, and the
other for collapsing the rivet engaged by the
spindle .by pressing on the reaction member to
move the ,spindle and the support, relatively
. thereto, and `ineans for controlling the supply of
pressure fluid to said respective pressure ñuid
responsive means.
A
9. A' tool for installing internally threaded
`tubular rivets, said tool comprising a. support,.
>an -anvil carried thereby, a spindlemounted in
the support and having rotation relatively to the
anvil, said spindle having a threadedouter end
for engagement with the threaded portion of the
.
13. A tool for installing internally Athreaded
tubular rivets, said tool comprising a support,
vrelatively movable anvil and rotary spindle ele
ments mounted in the support, said spindle'ex
tending through the anvil and having a threaded
outer end lfor engagement with the threaded por
tion vof .the-rivet, power actuated Ameans in the
support for rotating the spindle with respect to
the rivet and other means for collapsing the rivet
engaged by the spindle by imparting relative
f endwise movement to the anvil and the spindle iny
the riveting stroke of the tool, said anvil being
~spring biased in a sleeve threadedly mounted on
the support, the threaded mounting of the sleeve
permitting adjustent of the length of said stroke
to determine the set to be given to the rivet, and
spindle'for collapsing the rivet engaged-by the 50 a check device for holding the sleeve in its ad
dusted positions.
l
spindle and the anvil, other means for rotating
14. A tool for 'installing internally threaded
the spindle to engage and disengage the same
Awith 'respect to the rivet, and electrical signal ì tubular, rivets, said tool comprising a‘support,
relatively movable anvil and rotary spindle ele
means on the support and operable in response to
the riveting stroke of the tool on closing contacts 55 ments in said support, said spindle extending
in the signal circuit for indicating a completion
through the anvil and having a threaded outer ,
end for engagement with the threaded portion of,
of said stroke.
.
_
'
j
10. A tool for installing internally threaded
the rivet, two pressure fluid responsive means in
the support, one operating through the anvil fortubular rivets, said tool comprising a, support, an
anvil carried thereby, a rotary spindle mounted 60 collapsing the rivet engaged by the spindle, and
the other rotating the spindle relatively to the
in the support and having a threaded outer end
for engagement with the threaded portion of the ’ .rivet to engage and disengage the same, a single
. rivet, power operated means in the support and
source of pressure iluid supply for both of said
having a riveting stroke operable through, the
pressure fluid responsive means, and a single
spindle for collapsing the rivet engaged thereby, 65 valve for controlling the supply of pressure fluid
rivet,»power actuated means in the support and
having- a riveting stroke operable through the
other means for rotating the spindle to engage »
to
said
respective
pressure
fluid - responsive
and disengage the same _with respect to the rivet,
, l5. A tool for installing. internally threaded
andan electrical signal and a switch and circuit
therefor having separable contacts on `the anvil
tubular rivets, said tool comprising a support,
and the support, respectively, and which contacts 70 relatively movable anvil andv rotary spindle ele
ments in the support, said spindle extending
-are closed in .response to the riveting stroke of
through the vanvil and having a threaded outer
the tool for indicating the completion of said
end for engagement with the threaded portion of
stroke.
the rivet, two pressure fluid responsive means in
11.,A tool for installing internally threaded
the support, one operating through the anvil for
tubular rivets,vsaid tool comprising a support,
means.
s
A
'
` 2,403,675
v
'
i3
collapsing the rivet engaged by the spindle, and
the other for rotating the spindle with respect to
the rivet to engage and disengage the same, a
single source of pressure iluid supply for both of
said pressure fluid responsive means, a rotary
said spindle extending through the anvil and"
havinga threaded outer end for engagement with
the threaded portionof the rivet, power oper
ated means including a lever fulcrumed on the
support for pressing the anvil outwardly rela
tively tothe support for collapsing the rivet en
valve in the support for controlling the supply of
-~»gaged by the spindle, other means for rotating
pressure ñuid to the respective pressure ñuid re
the- spindle with respect to the rivet, and an in
sponsive means, and a single actuating member
terconnection between the lever and the anvil
for turning said valve.
16. A tool of thecharacter deñned in claim 15 10 for holding the latter> against rotation.
20. A tool for installing internally threaded
characterized by the fact that the actuating
tubular rivets, said tool comprising a support,
means for the valve comprises a lever and a
relatively movable anvil and rotary spindle ele
ratchet mechanism therefor in the support and
ments mounted in the support, said spindle being
on `the valve, respectively.
17. A tool of the character defined in claim 15 15 connectible with the rivet through its threaded
portion, power actuated means in the support for
characterized by the fact that the actuating
rotating the spindle to connect and disconnect
means for the valve comprises a lever on the
'Y the same with respect to the rivet and other
support,- a ratchet mechanism on the valve hav
means to upset the rivet connected with the
ing >ratchet teeth about the valve axis, an arm
pivoted to the lever and overlying the portion of 20 spindle by imparting relativev endwise movement
to the anvil and the spindle on the riveting stroke
the valve provided with said ratchet teeth, and
of the tool, and means for adjusting the length
a spring biased plunger carried by the arm and
of said stroke to determine the setto be given to
co-acting with said ratchet teeth for turning the
the rivet including coacting abutments on the
support and the anvil, respectively, the spacing
18. A tool for installing` internally threaded
between'the abutments being varied to determine
tubular rivets, said tool comprising a support,
the length of said stroke.
relatively movable action and reaction members
21. A tool for installing internally threaded
'in the support, one of said members being in
tubular rivets, said tool comprising a support, a
the form of a rotary spindle extending through
the other memberand having a threaded outer 30 sleeve threadedly mounted in said support, a
spring biased anvil slidably 'mounted in said
end for engagement with the threaded portion of sleeve and normally projecting beyond the outer
the rivet, two motor elements in the support, one
end of the same,> a spindle revolubly and slidably
for creating relative endwise movement between
„mounted in the anvil and extending therethrough
the action and reaction members for collapsing
and connectible at its outer end with the thread
the rivet engaged by the spindle, and the other
ed portion of the rivet to be upset by the tool,
for rotating the spindle for engaging and disen-l
power actuated means in the support for rotat
gaging the same with respect to the rivet, a rotary,
ing the spindle to connect and disconnect the
control means on the support for controlling the
same with respect to the rivet and other means
operation of said respective motor means, said
control means having predetermined rotative 40 to upset the rivet- connected with the spindle by
imparting relative endwise movement to the anvil
positions for first screwing the spindle into the ,
and the spindle in the riveting stroke of the tool,
threaded portion of the rivet and then collapsing
said sleeve and the anvil having coacting abut
the rivet through the spindle and thereafter re-“
ments to determine .the riveting stroke of the
tracting the collapsing l_means and unscrewing 1
the spindle from the rivet, and a single actuating 4. tool, and said sleeve having its outer end formed
to be engaged for turning the sleeve relatively to
member carried by the support for successively
the anvil to adjust the spacing between said `
moving the control means through said respective
abutments.
rotative positions.
'
22. A tool of the character deiined in claim 21
, 19. A tool for installing internally threaded
characterized by the fact that a cap device fits
tubular rivets, said tool comprising a support, an
on the support over the outer end of the sleeve
anvil slidably mounted in the suppOrt for en
and. that the anvil and spindle elements exten
gaging the rivet, a rotary spindleA having a swiv
valve.
»
f
_
,
eled connection with the support and fixed
against endwise movement with respect thereto,
through said cap device.
WALTER GEORGE MITCHELL.
'
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