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Патент USA US2131688

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Sept. 27, 1938.
Filed Feb. 19', 1957
‘5 Sheets-Sheet l
Sept. 27, 1938.
Filed Feb. 19, 1937
5 Sheets-Sheet 2
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SePt- 27, 1938.
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Filed Feb. 19, 19s?
3 sheets-sheet s
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Patented Sept. 27, 1938
243L688 J
UNITED sTArss gPA'i‘éiE-N'i‘ lorries Y’
William E. Marchant, Detroit, Mich; Frankie Lee
Marchant executrix of William- E. Marchant,
Application February 19, 1937, Serial No. 126,700’
15 Claims. "(01. 29-33)
This invention relates to fastening devices, par
ticularly for securing together sheet or panel
like material, and especially concerns riveting
mechanisms and other forms of metallic fasteners.
An important object of the invention is the
provision of an improved automatic combined
punching and riveting machine, adapted to per~
form the required operations in quick succession
and Without movement of the work.
Improved compensating means for riveting ma
chines, so arranged as to prevent interference
with proper upsetting of the rivets due to uneven
nesses in the thickness of the work, comprises
another object of the invention;
Another important object is the incorporation
in such machines of ‘ improved non-repeating
means for preventing repeated actuation of the
mechanism on a single depression or release of
Figure5 is a view similar to Figure l, but partly
broken away, of a riveting machine of somewhat
modi?ed construction, incorporating adifferent
form of sliding anvil.
Figure 5—-A is a sectional detailed view of the ,.
anvil assembly showing the‘ drifting locating pin
in retracted position.
. Referring now to- the drawings, the‘machine
shown in Figure 1 constitutes a further develop
ment of the construction disclosed in Lloyd D.
Marchant patent, No. 2,069,042, issued January 26, l0
1937. A frame is provided comprising a ‘column
22 carrying a table portion 25 and a head portion
28, the latter supporting a‘slidable head section
or carriage 30 movable horizontally in the frame 15
and carrying punching and riveting plungers
3l—32, vertically reciprocable toward and from .
the operating pedal or element.
Still another object lies in the incorporation
in an automatic punching and riveting machine
having a generally C-shaped frame, in conjunc
the anvil assembly 35 mounted upon the table.
tion with spaced punching and riveting plungers
the exposed top‘ of whicheverworking plunger
mounted in a movable turret carried by the head
25 of the machine, of cooperating punching and anvil
portions mounted and slidable in the bed of the
machine and operable in conjunction with the
Bysliding the carriage either plunger maybe
aligned with the operating position of the anvil, 20
and with the coaxially disposed driving ram ‘40,
vertically slidable in the head. ‘ The ram engages ‘
may be aligned therewith, ‘and is depressed to
actuate the same by a- cam 42, carried upon drivev
shaft 44, journaled in bearings 45-51 carried by
the head, the‘drive being indicated as by belt)
A further object is the provision of an improved
30 slidable anvil assembly for riveting and/ or punch
ing machines, arranged to slide to a readily acces
sible position to facilitate loading of the work
when the operating parts’ are retracted from each
other, and which upon commencement of the
35 cycle of actuation of the operating parts is re
turned to operative position, carrying the loaded
Still other objects and advantages will be ap
parent from the following description, wherein
reference is made to the accompanying drawings
illustrating a preferred embodiment of my inven
tion and wherein similar reference numerals
designate similar parts throughout the several
Inithe drawings:
Figure, 1 is a vertical sectional elevational view
of an automatic punching and riveting machine
incorporating the principles of my invention.
Figuresv 2 and ‘3 are fragmentary front elevation
59 and sectional views taken respectively on the lines
2—2 and 3—3 of Figure 1 and looking in the direc
tion of the arrows.
Figure 4 is a view similar to Figure 3, showing
the non-repeating clutch mechanism, in a dif
55 ferent position.
The punching operation is performed by the
plunger 3| with the carriage in the rear or re
tracted position, where it is held by a latch piece
50, reciprocable in the frame into'and out of " V
engagement with a keeper portion 5| carried by.
the carriage. Descent of the ram acts to release
the latch piece, a cam 52 formed upon and oper- 35
able by a slide rod 53 serving to retract the
latch, which is normally projected by its return
spring 54. The forward end of latch-actuating
cam rod 53 is operable by an angular cam sur
face M formed upon there‘ar face of ram’ 40.
Descent of the ram will'be seen'to lock the care
riage in place, and simultaneously to release latch
56, through rod 53, whereafter the effort of car
riage, projecting spring 55 to thrust the carriage
forwardly is opposed v only by the ram, which 4~
while projecting into the vcarriage, locks the lat
ter in position.
As soon as the ram in its upward
or return movement leaves the carriage, there
fore, the spring moves the carriage forwardly, to
a position to align riveting plungeri32 with ram 40.- 50
So much'of the mechanism as has thus far been‘
described will be seen to be similar to that of the
punching and riveting machine disclosed in the
aforementioned patent to LloydD. Marchant. In
-, the present construction, however, theanvil as- 55,.
sembly, instead of being ?xed in the table of the
machine, is slidable in the table, its movement
being simultaneous with that of the carriage, but
opposite in direction.
The anvil assembly is actuated by a lever .51
articulated to the carriage and pivoted in the
frame, as upon pin 59, the lower end of the lever
being connected by means of a link BI to an
anvil carriage 60 upon which the anvil assembly
Incorporated in link 8| is a cylindri
cal housing 64 containing a cushioning spring 63,
the cylinder being articulated at one end to» the
10 is mounted.
, lower end of the'lever 51, and the spring bearing
against the other end of the cylinder, while the
other end of the spring bears against an abutment
65 carried by the link section 6| , which is articu
lated to the anvil carriage and slidable in the
cylinder. The spring will be seen to allow inde
A work-compressing and stripping element 81
encircles punch 8!! and is yieldably projected, to
substantially the position shown in Figures 1 and
2, by the springs 88, best shown in the latter
?gure. Such stripper 8'! is supported, and springs
88 are held, by pins 89 carried directly by the
table 25, the stripper being thus incapable of
reciprocation with the anvil assembly. A latch
ing dog 92 tends to hold the anvil assembly in the
projected position in which the punch is aligned 10
with the stripper and with the operating axis of
the ram and plungers, such dog and the punch
backing block 85 being operated by lever 57
through suitable connecting links 93—9B.
When the machine is cooked and ready for 15
operation the parts occupy the position shown,
the head being retracted and the anvil projected,
to align the punch with punching die
pendent forward movement of the carriage 30 in ~ cooking is effected by means of a foot pedal (un
shown) or other operating mechanism so con“ 20
20 event the anvil is held, although acting upon the
anvil assembly to urge it toward a predetermined nected to the rod We that the same may be pulled
position with relation to the carriage 30.
downward at the will of the operator. The ?rst
effect of such downward movement of the rod
Instead of directly supporting the anvil car,
riage upon ways formed in the table 25, I prefer
ably mount it for sliding travel over a bed plate
as 6? carried by the table and capable of limited
is to so rock the lever 51 (to the right, as viewed
in the drawings) as to return the head carriage 38 25
vertical movement with respect thereto, the plate
being ‘yieldably held in desired position by a
relatively heavy compensating spring‘ 18 acting
which moves as a unit therewith, and acts upon
30 through a lever ‘ll journaled in the frame upon
pin 12 to hold the carriage and anvil assembly
normally raised. At its lower end the spring
bears against an abutment plate 11 carried at
the bottom of a pull rod 18 which extends
through the spring, the upper‘ spring abutment
plate 19 being rigidly ?xed in the frame, while at
its top the pull rod is articulated to the lever ‘I l.
The other end of the lever bears upwardly
against the bottom of a stem 14 projecting'down
wardly from and shown as integral with the bed
plate, the stem being vertically slidable in the
table. The normal position of the bed plate and
anvil is determined by a pair of jamb nuts 16',
threaded upon the stem beneath the table. Un
due downward pressure upon the anvil 35 is thus
transmitted through carriage 68, bed 61, and
lever ‘H to the spring 10, which allows but
opposes such movement, its tension being greater
than the intended upsetting pressure, but such
as to allow the anvil to yield in event dangerous
' pressures are built up,’ such as might be caused
by unusual thickness of the work or length of the
The anvil assembly incorporates a punch 88,
which is vertically slidable and also functions as a
locating pin. The punching die 33 is propor
tioned to inter?t with the pin. An upsetting cup
or dolly portion 82, is formed in the anvil, shaped
and positioned to cooperate with the head of
60 riveting ram 32 and the travel of the anvil as
sembly. The travel of the anvil is so propor
tioned to that of the carriage 38 as to align ele
ments 80-33 and 82-32, one at each extreme of
movement of the reciprocating carriage and anvil
and anvil assembly to these positions.
The pull rod IE8 is secured to a slide block if! I,
lever 51 through the laterally projecting arm 58
of the latter, which extends into the path of 30
movement of a dog H32 carried by and recipro
cable transversely in the slide Hll. A spring‘ I04
ordinarily projects the dog to a position in which
it may engage the end of arm 58 to actuate lever
5'1 when rod I68 is pulled downward.
Dog 5
also extends from the opposite side of slide lei,‘
where it carries a follower E83 engageable with
a ?xed cam Hi5 mounted on the housing or
bracket iii’! in which slide lGl travels, the ar
rangement being such that as‘ the slide moves
downward with the rod, carrying with it the dog
H32, the latter engages and rocks lever arm 58 to
retract the head carriage 38 far enough to allow
the latch piece 50 to drop into the opening in
striker 5! and lock the carriage whereafter con 45
tinued downward movement of the slide block
retracts the laterally slidable dog I02, due to en
gagement of its follower I03 with cam I05, freeing
the dog from the arm 58 and allowing continued
independent downward movement of the rod and
slide, to thereafter trip the clutch mechanism and
cause depression of the operating ram and so of
punching die 33.
The cam I85 is shown as ad
justably secured to guide bracket it‘! by means of
the clamping bolt I89.
The drive from pu'lley 45 to cam 42 is con
trolled by a non-repeating clutch mechanism‘
shown in Figures 1, 3 and 4, which allows but a
single actuation of the cam 42, and so of ram
40, upon each depression of the operating pull (SO
rod I88. Such clutch comprises an internally
toothed ring H5 secured to and turning with
pulley 45, the pulley being journaled upon the
end of shaft 44 for independent rotation except
when locked thereto through the ring. With the
During certain phases only, the punch‘ is backed notched interior of the ring a key H6, radially
by an intermittently reciprocable backing block slidable in the shaft, cooperates. ‘As shown'in
85. When the block is not beneath the punch, Figure 1, the body of the key is mounted to the
the latter may be pushed downward suf?ciently left and clear of the ring, and a toothed portion
to free the work, although a relatively light spring H1 of the key projects into the area encircled
86 urges it upwardly, while when backed by the by the ring, and is movable into and out of en
block, in the manner shown in Figure 1, the gagement with the notched interior thereof to
punch is rigidly held in projected position, in clutch and free the shaft with respect to the
order that the work may be punched by the pulley. The body of the key l l6 projects from the
shaft beside the ring, and an operating cam H8
. telescoping of the die 33 thereover.
rockable upon an axis transverse to-the shaft lies
normally in the path of the key and :holds it in
the pressed-in position which frees tooth II ‘I
from the ring and allows, the drive pulley to turn
CI freely. When the cam rocked upon its
shaft I20, to the left as viewed in Figure 1 (and
toward the observer as viewed in Figures 3 and
4)., the key is projected by the spring I22 trapped
therebeneath in the shaft, and the tooth II'I,
10 engaging the notched ring, locks the pulley to the
shaft, thereby turning the latter. A blocking
arm H9 also projects upward from cam IIB into
the path of movement of the key, which arm
serves to hold the shaft and so the 'cam 42 in the
desired position, corresponding to retraction of
the ram, at the completion of each revolution of
the shaft. A spring £25 normally holds the cam
and blocking arm in the de-clutching and blocks
ing position shown in Figures 1 and 3. The
blocking arm may be swung from such blocking
position by pull rod “30, the upper extension I00’
of which acts thereupon through a link I26 ar
ticulated to its top by a pin I2’! parallel to shaft
£20, which pin allows the link to swing away
25 from such shaft, toward which it is urged, how
ever, by the spring I28.» Link I26 is notched as
at I29 for engagement with a pin I30 carried by
an actuating arm I32 projecting laterally from
cam and blocking member I I8.——i IS, with which it
may be integrally formed. When the rod I00 is
pulled down, it will be seen that the combined
cam and blocking member II8—-I I9 is rocked to
the left, resulting in engagement of the clutch
and rotation of the shaft. A cam I 35 carried by
35 the shaft projects therefrom far enough to en
gage the upper end of link I25, even when the
latter is pulled down to this position, and is
arranged to trip the same to the left, as viewed
in Figure 1, freeing pin I30 and allowing the
combined cam and blocking member II8--II9
to return independently, before the completion of
the revolution, to blocking and declutching posi
tion, the shaft being thus stopped at the com
pletion of the single turn. It will be seen that
thereafter the clutch cannot be disengaged and
the shaft rotated until the rod I00 is allowedv
to rise and element I26 relatched with the pin
I30, whereafter the operation may be repeated.
So long, however, as the operator maintains his
50 foot upon the operating pedal, the machine will
perform but a single operation and then stop.
A spring I31 tends to return the rod and the
operating elements carried thereby to the upper
An arm I40 carried at the rear end of the
slidable head carriage 30 projects upwardly there_’
from, and when the head moves forward engages
the spring 56 carried by the latch-operating cam
rod 53, and acts through such spring to throw the
60 rod to the forward position which allows engage
ment of latch bolt 50. During such movement
arm I40 also strikes a bell-crank I42 journaled on
a cross shaft I44, and the other arm of the bell
movement downward of the operating rod‘ frees
cam II8 of latch piece H6 and allows engage
ment of the latter and operation. of punching
plunger 3|. Upon complete retraction of'the
ram I10, latch 50 having been released by its
descent, the head carriage moves forward under
the in?uence of spring 55, and the spring 63 is '
compressed, tending to pull back the anvil as
sembly, although movement of the anvil cannot
take place so long as pin 80 projects through the. 110*
stripper 81. and through . the work.
Forward ,,
movement of the carriage again trips cam II8,
providing pull rod I00 has in the interval been
released. If it has not been soreleased, it ‘will
be seen to be necessary to r'eactuate the pull rod, 15'
which of course constitutes. a safety feature. In
either event the succeeding second revolution of
cam 42 actuates the riveting plunger 32, which
forces a rivet (unshown) from the jaws I50 (into
which the rivet has been fed by conventional or 20?
any suitable feeding mechanism, also'unshown)
into the punched hole in the work.
Lost mo
tion is incorporated in the pull rod assembly by
means of a collar I06 secured to one section of
the rod, while the other section is limitedly, slid
able relatively thereto by virtue of a pin and slot
As soon as the stemv of the rivet has pushed‘
punch 80 downward‘ out of thework and free of
member 81, the anvil assembly snaps to the right, 30I
actuated by spring 63, aligning the riveting por
tion 82 with the plunger and rivet stem, and con
tinued downward movement of plunger upsets the
rivet. vForward movement of the carriage 30
pulls the cam 85 from beneath th'epunch 80,
which is thus freed for downward movement by
the rivet stem, rearward movement of the lower;
end of lever 51, as the turret moved forwardly,
having previously released the latch member 92.
Figure 5 shows a riveting'machine arranged
for riveting only, carried by a C-frame 2!a hav-.
ing a head portion 280, and a table 25a. The
head carries a ram' 40a operable bya crank 42a
and pitman 43a drivable by a shaft 44a which is
in turn drivable by va pulley 45a through a non-,
repeating clutch mechanism generally ‘designated
I I5a, the construction of which may be generally’
similar to that of the non-repeating clutch de.-‘
scribed in connection with the ?rstembodiment.
The ram 40a is adapted to drive a riveting plung
er 32a, by which a rivet supported in the rivet 50.
holding jaws I50a may be forced through an
aperture'previously formed in the work, and up
set against the anvil assembly generally desig
nated 35a. The operating pull rod IBM is not
connected directly to the clutch-controlling mem
ber I26a, but serves to actuate a bellcrank I55
fulcrumed on a cross-shaft‘ I56 carried by the,
table 25a. The anvil assembly 35ais slidable with
its supporting carriage 60a upon the'table, and '60
actuable by the bellcrank from a forwardly pro-;
jected loading position, in which it is shown in
Figure 5, to a working position in alignment with
crank, bearing downwardly against a lug I45 fas
the axis of the riveting plunger, whereat it is
65 tened to the rod section I00’, thereby reactuates
the rod, if the same has been released, to free the , stopped by engagement of stop screw I5‘! with 65
pad I 50. Rearward actuation of the carriage sea
clutch for engagement a second time and auto
matically institute the second actuation of ram is transmitted thereto through a spring and
plunger assembly I60, ‘I52, the plunger being slid-v
40 required to perform thepriveting operation.
The operation of the machine will be seen to be able with relation to the carriage and extending
normally effected by a single depression of the through a lug '6Ia carried by the carriage. The
pedal, which ?rst retracts and cooks the head spring yieldably holds the carriage and a cam
and throws the anvil assembly forward to the plate I02 against movement with relation to each 7
other, the cam plate being slidable in the same
riveting position, the cocking being effected by direction,
in a slot in the carriage, and the bell
dog I02 acting through lever 5?. Continued: crank. I55 bearingv only against the cam plate in
inducing rearward movement of . the carriage.
When the bellcrank is rocked to the right as
viewed in Figure 5, the carriage 60a and cam plate
I62 travel to the rear as a unit until the carriage
is stopped and held in operative position by stop
screw I51. Thereafter continued movement of
the bellcrank moves the carnplate alone, com
pressing spring l??. The cam‘, during such con
tinued movement, ?rst actuates a motion-increas
10 ing‘mechanism for increasing the travel of the
ram, and then forces down the extension pull
rod Illla connected to the non-repeating clutch.
As' indicated in the ?gure, the riveting plunger
aligned anvil and ram portions carried by the
frame,' one reciprocable toward and from an
other, work compressing means yieldably project
ible fromone of said'portions toward the other
to compress the work before and during upsetting,
said compressing means being retractible under
the upsetting pressure which urges said members
together and being arranged on opposite sides of
one of said portions, and work locating means
comprising a drifting pin portion centrally pro
jecting from one of said portions toward the
other and retractible into the member by which
it is carried under the compression pressure.
2. Means as set forth in claim 1 in which said
32a is slidable directly in the head. To increase ‘
drifting locating pin forms a central section of
15 its initial. travel, as is frequently desirable in
the anvil portion, and positive stop means for
working upon parts deeplydrawn, orhaving con
siderable overhang, and accordingly demanding
more than usual retraction and initial movement
of the operating. plunger, I provide a motion-in
creasing cam. Hi5 slidable laterallyin the head
and operable by the foot pedal or other actuating
means through the supplementary extension pull
rod lQl previously mentioned. The multiplying
mechanism acts to' initially actuate the plunger
25' 32a.‘ and advance the same to a predetermined.
extent before the power drive is applied thereto.
Such preliminary movement of the plunger 32a
is effected by forward movement of the cam ne,
which movement is transmitted to cam I‘!!! when
30; rod MI is moved downward, through an angular
cam slot I74 formed in the rearward extension of
cam I10, in which slot a roller H5 carried at
the top of rod l9! travels when the rod is pulled
downwardly. Trapped in the body of cam Ht‘ is
35; a drifting plunger I'll so positioned as to be
aligned with plungers Ada-32a. when cam lid
is in the forward position.
The operation of the mechanism, although
doubtless apparent from the foregoing, may be
411' summarized as follows: With the machine at rest,
the anvil assembly being in forward position, work
may be very conveniently loaded thereupon, for
which purpose the drifting dolly pin 82a forming
the central section of the anvil serves as a pilot.
As shown in Figure 5—~A,‘ the top of 'the dolly pin
82a is conical, and its depressed or operating
position shown in that view is such that the base of
the conical tip lies substantially in the bottom
of the frusto-conical or cupped portion H38, which
with the rigid dolly section I82 in which the pin
is slidable forms‘ an upsetting cup. The stripper
35a surrounding the dolly body is indicated as
yieldably projected by a spring l83. The pointed
dolly pin constitutes the ?rst part‘ of'the anvil
engaged by the end of the rivet shank, and serves
553 to initiate the upsetting of solid rivets from the
center outwardly, insuring a smooth outward flow
of the metal during formation of the upset head,
similar to that obtained in the rolling of the head
of an eyelet or tubular rivet, and greatly reduc
ing the possibility of fracture, which is ordinarily
greater in the heading of solid rivets.
The work is carried into operating position
with the dolly assembly when the bellcrank I55
is actuated during the initial part of its move
ment. Continued movement-‘of the bellcrank ad
vances the plunger downwardly upon the work,
limiting retraction of said locating member to a
position of desired alignment with the remainder
of the anvil portion, in which position it forms
an operative portion of the anvil for cooperation 20
with said ram portion.
3. Means as set forth in claim 1 in which said
drifting locating pin forms a central operative
section of the anvil, means ‘for limiting retractive
movement of said pin to a position of desired
operative alignment with the remainder of the
anvil portion, said anvil portion being of generally
cupped con?guration, and said pin when so re
tracted forming a pointed reentrant portion cen
trally disposed in the anvil portion.
4. In a riveting machine, in combination with
a frame, relatively reciprocable ram and anvil
portions carried thereby, said anvil being of gen
erally concave form, and a pointed reentrant sec
tion carried’ by the anvil projecting toward the
ram portion to initiate upsetting of the work by
inducing an outflow of metal away from the op
erative axis of said ram and anvil portions.
5. In a riveting machine, a frame, a ram re
ciprocable in the frame, an anvil assembly to
ward and from which said ram is reciprocable,
said anvil assembly being laterally movable to
and from a position of operative axial align
ment with the ram, actuating means for saidv
ram, controlling means for said actuating means
including non-repeat mechanism incorporating
a member actuable to cause depression of the
ram ‘portion, interlocked operating means for
said anvil assembly and said member actuable to
cause depression of the ram, said operating means
acting ?rst upon the anvil assembly to move the
same into operative alignment with the ram and
then ‘actuating said member.
6. Means as set forth in claim 5 in which said
operating, means includes a member. continu
ously movable and acting upon the anvil assem-2
bly in the ?rst portion of its travel and to actue
ate said member in a later portion of its con
tinuous travel.
'7. In a riveting machine, in combination with
a frame, an anvil carried by the frame, a ram re
ciprocable toward and from the anvil, power
driving means for the ram, a release mechanism
adapted to be tripped to initiate depression of
the, ram under such power drive, a member mov
by actuation of the cam I10, and thereafter ap
able to trip said power drive, and means also
actuable by said member for initially moving one
of said portions toward the other to increase
plies the power drive, upon sufficient actuation
the effective travel thereof.
. of rod Hlla, although the latter does not occur
until alignment of the drifting extension plunger
I'll allows transmission of the power drive there
What I claim is:
1. In a riveting machine, a frame, operatively
8. Means as set forth in claim '7 in which said
means for increasing the effective travel of the
ram comprises a drifting extension portion for
the ram, and mechanical means for moving such
extension portion laterally into and out of inter
posed relation with respect to the remainder of 75
the ram and its driving means, said extension
portion when in such interposed position acting
to transmit the upsetting pressure from the power
drive to the head of the ram portion.
9. Means as set forth in claim 7 in which said
means to increase the effective travel of one of
said portions comprises an extension member for
the ram, common operating means for said ex
tension.- member and for said power driving
10 means, and means also actuable by said operat
ing means for moving the anvil portion laterally
into and out of operative alignment with the
path of travel of the ram portion.
10. In a combined punching and riveting ma
15 chine, in combination with a frame, a head por
tion laterally movable in the frame, punching
and riveting ram portions carried by said head
portion, power driving means for said ram por
tions, means for moving the head portion to bring
20 either of said ram portions into a line of opera
tive movement, an anvil assembly carried by the
frame, punching and riveting portions carried by
said anvil assembly, said anvil assembly being
laterally movable to align either of said portions
25 with said line of operative movement, means con
necting said head portion and said anvil assem
bly for simultaneous movement, and power drive
means for driving said ram portions toward said
anvil assembly.
11. Means as set forth in claim 10 including
an operating member for controlling said power
drive means, and means providing connection
between said operating means and said head
and anvil portions, for moving said portions to
35 desired positions upon actuation of said operat
12. Means as set forth 'in claim 10 including
an operating member for controlling said power
drive means, and means providing connection be
40 tween said operating means and said head and
anvil portions, for moving said portions to de
sired positions upon actuation of said operating
means, said means for controlling the power
drive means being releasable upon initial ac
45 tuation of said operating means, said means for
moving the head and anvil portions being releas
able upon initial actuation of said operating
means, and means for moving the head and
anvil portions in response to continued movement
of said operating means.
13.,Means as set forth in claim 10 including
yieldable means providing mechanical connec
tion between said head and anvil portions, said
yieldable means tending to- maintain said por-'
'tions in a predetermined relation, but allowing 10
independent movement of one in event the other
14. Means as set forth in claim 1 in which
said drifting locating pin forms a central sec
tion of the anvil portion, stop means for limiting
retraction of said pin to a position of ‘desired 15
alignment with the remainder of the anvil por
tion, in which position it forms an operative sec
tion of the anvil portion for cooperation with
said ram portion, and jaw means movable with
the ram portion for supporting a rivet with its
stem projecting towardand in alignment with
the pin and its head toward and engageable by
the ram portion, said jaw means being releasable
to free the rivet as the stem of the latter is forced
through the work and against the pin.
15. Means as set forth in claim 1 in which said
anvil portion is located beneath the ram portion
and said drifting locating pin is projectable up
wardly through the anvil portion, means for lim 30
iting retraction of said pin to a position of de
sired alignment with the remainder of the anvil
portion, in which position it forms an operative
section of the anvil portion for cooperation with
said ram portion, jaw means movable with the. 35
ram portion and engageable with the stem of a
rivet to support the same with its stem project
ing downwardly toward and in alignment with
the pin, and with its head backed by the ram
portion, said jaw means being separable far. 40
enough to allow the head of the ram to pass
therebetween, and to release thev rivet, as the
stem of the latter is forced downwardly through _
the work and against said pin.
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