Improven ents in Portable Riveters, Drilling Machines, or like Portable Tools.
Year: 1898

page_text: Date of Application, 20th Sept., 1898-Accepted, 28th Jan., 1899
COMPLETE SPECIFICATION.
Improven ents in Portable Riveters, Drilling Machines, or like
Portable Tools.
I, ELIAS GUNNELL, of 9830, Avenue H, Chicago, Illinois, United States of
America, Engineer, do hereby declare the nature of this invention and in what
manner the same is to be performed, to be particularly described and ascertained
in and by the following statement:―
My invention relates more particularly to the driving of countersunk_flush-
pointed rivets, and has for its principal object the provision of means whereby
such rivets may be readily driven and finished with what are known as pneu-
matic hammers, in locations and under conditions where it has heretofore been
difficult and to some extent impracticable to employ such hammers. As is well
known, where pneumatic hammers can be conveniently employed in driving rivets,
the work can be done much more expeditiously than by hand, and at a conse-
quent great saving of labor and expense, but in some locations and under some
conditions, as for instance the rivets in the outer shell of a steel ship, it has not
heretofore been practicable to utilize pneumatic hammers in the work.
invention relates to novel apparatus for supporting, adjusting, and properly
manipulating pneumatic hammers for the driving of flush-pointed countersunk
rivets in such locations, and also includes, incidentally, apparatus for the im-
proved manipulation of pneumatic hammers for driving such rivets in other
locations as well.
My
In the ordinary practice of driving flush-pointed countersunk rivets, three
men are required, one to "hold on with a heavy hammer against the head of
the rivet and the other two to beat down the point of the rivet with hand
hammers, then cut off with a chisel the excess metal in the point, and then finish
it off flush with the plate. Nearly all of such rivets are employed in locations
where, as in the outer shell or decks of a steel ship, there is no connection
between the two sides of the work, and the rivets cannot be driven by a power
riveter mounted on a bow-frame or yoke, since such frame or yoke will not
straddle the work in such locations, and reach with one arm to the head side and
with the other to the point side of the rivet.
My invention involves the employment of an adjustable support for the pneu-
matic hammer, which may be readily attached at any desired point to the outer
surface of the shell of a steel ship, or other similar surface, and by means of which
a pneumatic hammer, carried by such support may be readily applied to and
used upon the points of all the rivets within a large area of the surface of the
work without shifting the attachment of the supporting device. It also involves
provision for movement of the pneumatic hammer upon the adjustable support in
such a way that the hammer may be made to act conveniently and efficiently
upon the points of the rivets which are to be driven; all as hereinafter more
fully explained and particularly pointed out in the claims.
In the accompanying drawings Figure 1 is a side elevation of one form of
my complete apparatus as used, for instance, in driving rivets in the botton-
plates of the shell of a ship: Figure 2 an end clevation of the parts shown in

page_text: Figure 1, looking in the direction of the arrow in Figure 1; Figure 3 a bottom
plan view of the parts shown in Figure 1, and Figure 4 a top plan view thereof,
both views omitting the plates to which the parts are attached, and through which
the rivets pass; Figure 5 an enlarged plan of the yoke end of the supporting
beam and the hammer-supporting gimbals mounted therein; Figure 6 a side
elevation of the pneumatic hammer and its enclosing cylinder which are mounted
in the gimbals of the supporting beam; Figure 7 is a middle longitudinal
section of the parts shown in Figure 6, on the line 7-7 of the latter figure;
Figure 8 an enlarged side elevation, partly in section, showing a different method
of mounting the pneumatic hammer upon the end of the beam; Figure 9 a view
similar to Figure 1, showing a modified method of mounting the adjustablo
support for the hammer: Figure 9 a cross-sectional detail; Figure 10 a bottom
plan of Figure 9; and Figure 11 a view showing still another method of mounting
the hammer upon the adjustable support.
In Figure 1, A and B may be taken to represent two outer plates of the shell
of a ship, and a butt plate or strap covering the joint between them and to
be riveted to them. 1) is a fixed channel bar of the interior frame-work, against
which abuts the upper end of a pneumatic "holder on" E, consisting of the
rod or pipe abutting at its upper end against the bar D) and carrying at its lower
end a cylinder F whose piston carries at its lower end the "button-set" which
fits over the head of the rivet passed through the plates C and B. Compressed
air admitted to the upper end of the cylinder F from a supply pipe H forces
the piston downward and presses the button-set G against the head of the rivet.
Any other suitable form of holder-on may be used.
Swivelled at its upper end in a support I removably attached to the plate A
is a yoke J in the lower ends of whose pendant arms is journaled the roller or
wheel K. L is a longitudinal beam or bar, which passes between, the arms of
the yoke J and rests upon the roller K. Inasmuch as this beam is free to be
moved lengthwise through the yoke in either direction, and can also be swung
in a circle with the yoke on the swivelled support of the latter, it follows that
either end of the beam may be adjusted to any point in the area enclosed within
a circle having a radius nearly equal to the length of the beam, with the pivot
of the yoke J for its centre. In practice, I employ a beam about ten feet in
length, in which event from one point of attachment of the support I to the
plate A an area of surface upwards of fifteen feet in diameter may be covered
without shifting the attachment of the support I to the plate A. In practice, the
range of adjustment of the beam is preferably made sufficient to cover an area
containing as many rivets as one man can drive in a day with my improved
apparatus usually from 300 to 600 rivets.
At its left hand end, the beam carries an inverted caster-wheel M adapted to
bear against the under side of the plate A and travel freely over its surface
when the beam is shifted from one position to another. The rod or post X which
carries the wheel M passes freely through an eye in the end of the beam L, but
is threaded to receive a nut () which rests upon the upper side of the beam and
limits the downward movement of the post N and whel M. By turning this
nut 0, the wheel M may be raised or lowered relatively to the beam L to accom-
modate variations in the space between the end of the beam L and the surface of
the plate A, as where the wheel M may have to rest against the surface of the
shell of a vessel at a point where it curves relatively to the surface of the plate A
at the opposite end of the beam. By means of this adjustment of the wheel M,
the opposite end of the beam L, carrying the pneumatic hammer, may be main-
tained at an approximately uniform distance from the surface of the work where
the riveting is to be done. The caster-wheel M simply relieves friction and
may be omitted and the upper end of the rod or post allowed to abut directly
against the plate A, or any other suitable distance piece be employed for the
purpose.
The right hand end of the beam L has secured to it a yoke P', hereafter referred

page_text: to, and also carries a vertical cylinder Q which contains a piston having a ver-
tically extending rod R whose upper end bears against the surface of the work,
and has preferably seated in it a rubber block R for contact with the surface
of the work; (see also Figure 8). The lower end of the cylinder Q has con-
nected to it a supply pipe & from which compressed air, controlled by a valve T,
may be admitted to the lower end of the cylinder, to force the piston-rod R
upward against the plate A.
It will be understood from the foregoing that when the right hand end of
the beam has been adjusted to the desired point for work, the admission of the
air to the cylinder Q and forcing upward of the piston rod R will force the right
hand end of the beam L downward and the left hand end thereof upward,
causing the beam to be firmly held in its adjusted position against the plate A.
(whether the latter be on the bottom or on the side of the vessel) so long as the
compressed air is admitted to the cylinder Q. When it is desired to release the
beam from its fixed position, preparatory to shifting it from the position of one
rivet to another, the valve T will be turned to position to cut off the supply from
the pipe S and release air from the cylinder Q, thereby permitting the retraction
of the piston-rod R.
Having now described the adjustable support for the pneumatic hammer, and
the means for moving it to, and securing it in different positions, I will next
describe the method of mounting the hammer upon the end of the beam, as
illustrated in Figures 1 to 7. As shown in Figure 5, the opposite arms of the
yoke P carried by the end of the beam L are provided with eyes or journal-
bearings U through which pass the journals or trunnions V of a two-part gimbal
frame X, whose two halves are bolted together at a a. Coiled springs Y Y
surrounding the trunnions V V between the frame X and arms of the yoke P
yieldingly hold the frame in middle position between the arms of the yoke.
The two halves of the gimbal frame X at their points of junction a a are formed
with journal bearings to receive journals or trunnions Z Z projecting from the
opposite sides of a cylinder A¹, Figures 5, 6, and 7, which cylinder carries the
pneumatic hammer heretofore referred to, the trunnions Z Z being surrounded
by coiled springs similar to the coiled springs Y, and serving to yieldingly
hold the pneumatic hammer centrally of the gimbal frame. The cylinder or
barrel B of the pneumatic hammer slides freely through, but snugly fits, the
opposite ends or heads of the cylinder A', and the latter is provided at its
opposite ends with stuffing boxes C¹ to ensure close joints. The lower end of
the cylinder A¹ is connected by an integral yoke or pair of depending arms D¹ E¹
with a second cylinder F in which fits a piston (whose upper end is screwed in
and firmly secured to the lower end of the barrel or cylinder of the pneumatic
hammer. At its extreme lower end, the cylinder F is provided with a central
threaded hole for the connection of a compressed air supply-pipe I¹, Figure 1,
whose communication with the cylinder F¹ is controlled by a three-way valve J',
and of which pipe 1 the supply-pipe S heretofore referred to in the present
instance, forms a branch. When the valve J₁ is opened and compressed air
admitted from the pipe I to the lower end of the cylinder F, it will act upon
the piston G and press the latter and the entire pneumatic hammer upward in
the cylinders A FI, and cause the riveting die K carried by the upper end of
the pneumatic hammer, and upon which the piston of the hammer acts, to bear
against the point of the rivet.
The pneumatic hammer located in the cylinders A F¹ and pressed upward
by the admission of motive fluid to the lower end of the cylinder F¹ may be of
any well known or suitable construction adapted for the purpose. In the
present instance, and preferably, provision is made whereby the admission of the
motive fluid to the lower end of the cylinder F, for the purpose of pressing
the pneumatic hammer up to the work, will also serve to admit motive fluid
to the interior of the hammer and cause its piston to reciprocate and deliver its
blows to the stem or shank of the riveting die inserted in the upper end of the

page_text: barrel or cylinder of the hammer. In the present instance, a duct L¹, Figure 7.
communicating at its lower end with the interior of the cylinder F, extends
upward through the wall of the latter and through the arm El connecting the
cylinder with the cylinder A', and at its upper end communicates with the
interior of the cylinder A', being the annular space surrounding the barrel or
cylinder of the pneumatic hammer, within the cylinder A¹. From this annular
space the motive fluid is admitted to the interior of the pneumatic hammer by
ports which remain in communication with the interior of the cylinder A
during the entire length of movement of the cylinder B within the cylinder A
The piston N is composed of an enlarged head or lower end, fitting the large
bore of the cylinder B, and a long stem or body fitting the contracted bore of
the cylinder B and 1, the junction of said head and body forming an annular
shoulder b. The lower end of the piston is recessed at O, and the upper end
of the recess communicates with ports c opening through the sides of the piston.
In Figure 7, the piston is being driven upward to deliver a blow to the shank of
the riveting die K. As it approaches the limit of its upward movement, the
ports c pass the contracted portion O¹ of the bore of the cylinder B¹ and com-
municate with the exhaust, permitting the escape of the motive fluid beneath
the piston, which has driven it upward, whereupon the pressure of the motive
fluid against the annular shoulder b forces the piston downward, As it
approaches its lower limit of movement, the ports c will be brought into the
larger bore of the cylinder B¹, opposite the inlet ports M', so that the motive
fluid will then pass through said ports and the recess 0 to the lower end of the
cylinder, beneath the piston, and drive the latter upward again.
This is a well-known construction and operation of piston, and per se forms
no part of my invention, since, as heretofore stated, any suitable pneumatic
hammer may be employed.
From the foregoing description, it will be understood that when the valve J
is opened the pneumatic hammer will be forced upward until its riveting die
contacts with the point of the rivet, and that its piston will be started and
continue to deliver blows to the riveting die so long as the valve remains open
to admit motive fluid to the cylinder and hammer. When it is desired to stop
to operation of the hammer, and lower it from working position, the valve J
will be turned to position to cut off the supply of air from pipe I' and release
the air from the cylinders and hammer and permit the latter to be reset by a
coiled spring A surrounding the lower end of the cylinder B₁ and confined
thereon by a two-part ring B clamped to the cylinder, Figures 6 and 7.
It will be understood that the mounting of the pneumatic hammer upon the
end of the beam in the manner described permits greater freedom of movement
of the hammer, and allows the same, while being supported by the beam and
firmly pressed upward against the rivet, to be manipulated by the workman
with almost the same freedom that he could handle it, if held and supported
entirely in his hands. This freedom of movement is highly essential in the work
of driving countersunk flush-pointed rivets, and enables the point of the rivet to
be first battered down in substantially the same manner as the work is done by
hand, and then, after the surplus metal in the point has been cut away (either
with a chisel and hand-hammer or a chisel and pneumatic hammer) the point
of the rivet can be finished around its joint with the plate in the same manner as
by hand. In thus finishing the rivet, the operator will manipulate the hammer
by moving the lower end of the supporting cylinders of the hammer in one
direction and another, and in a circular direction when necessary, to cause the
riveting die to act upon and finish the entire point of the rivet, just as in the
case of handwork; and in this manner and by these means, the greatly increased
power and efficiency of pneumatic hammers is availed of, and the rivets driven
and finished much more expeditiously than is possible by hand-work, and with
more satisfactory results.
For the purpose of better holding the end of the riveting die in position against

page_text: the point of the rivet, without interfering with the freedom of movement of the
hammer, a suitable guide may be employed, consisting in the present instance
of a bent arm P¹ Figure 1, which is mounted to slide vertically upon the piston-
rod R, and at its extreme right hand end is provided with an eye or guide-
opening to receive the riveting die, which latter projects through the opening
in the arm P¹, but is restrained in its lateral movement thereby. At its extreme
opposite end, the arm " is vertically guided upon a fixed rod Q1 projecting from
the upper side of the beam L and surrounded by a coiled spring R' which is
confined upon the rod Q' by a head at its upper end and presses downward
against the arm P". This spring R¹ serves to retract the arm P¹ and yieldingly
hold it in normal position, while permitting it to move upward with the hammer
as the latter batters down the point of the rivet and advances to the work. The
riveting die K¹ has an annular shoulder which bears against the under side of the
guide arm P and lifts the latter, against the resistance of the spring R¹ as
the hammer advances to the work. The eye or guide-opening in the arm P is suffi-
ciently larger than the reduced upper end of the die K¹ to permit freedom of
movement of the latter in it. An enlarged view of the bent guide arm P is
shown in Figure 8. in connection with the modification heretofore referred to,
where the manner in which the arm co-operates with the riveting die will be
more clearly seen.
Referring now to Figure 8. the other method of supporting the pneumatic
hammer upon the end of the beam L, which has heretofore been referred to,
may be explained. In this modification, the beam L, instead of having a yoke
secured to it and the pneumatic hammer supported upon a gimbal frame in the
yoke, carries a bracket frame St, in which is supported or formed the cylinder Q
which contains the piston having the vertically extended rod R as and for the
purpose of that described in connection with Figure 1, and the guide arm P¹ is
mounted upon this piston rod and co-operates with the riveting die in the manner
heretofore explained. The bracket frame S has formed in its lower part an
annular seat in which is fitted a rotatable circular plate T having a depending
central stem upon which is fitted a crank by which the plate T may be
turned. In its upper surface, the plate T is provided with a central seat or
concave recess W and one or more outer seats or recesses X¹. The pneumatic
hammer and the cylinders containing the same are in this instance the same as
in Figures 6 and 7, excepting that the inlet port for the motive fluid is arranged
at the side of the cylinder 1, instead of in its lower end, and the lower end
of the cylinder is closed and provided with a knob or bearing point Y₁ adapted
to seat itself in the recesses WI X. By adjusting the hammer to the position
shown in Figure 8, with the knob Y at its lower end scated in one of the
recesses X¹, the riveting die may be made to act at an angle upon the point
of the rivet, to batter it down in the same manner that the work is commonly
done by hand, and after the surplus metal has been cut away and the pneumatic
hammer re-applied to the point of the rivet, the latter may be finished in the
desired manner by rotating the plate T¹ by means of the handle V₁, thus giving
the lower end of the hammer a circular movement and causing the die to finish
the rivet around its edge, at its joint with the plate. When it is desired to
have the die act centrally upon the rivet, in line with its axis, the lower end
of the hammer will be shifted to the central recess W1 in the plate T.
In Figures 9 and 10, I have illustrated a modified, and in some respects a
preferable, arrangement for mounting the adjustable support or beam L hereto-
fare described. In this instance, there is detachably secured to the plate A a
long pipe or tube ( provided in its under side with a longitudinal slot Du, as
shown in Figure 10. Any suitable means for attaching the pipe to the
plate A may be employed. In the present instance, the pipe is surrounded at
its opposite ends with ring plates E which are bolted at their upper ends to
forked plates F" whose upper ends terminate in threaded bolts passing through
the plates A and having nuts G" screwed upon them above said plate. The

page_text: forked lower ends of the plates F" embrace the upper half of the pipe C and
serve to hold it in fixed position, while the plates E" bolted to the plates F
support the pipe.
Arranged to travel longitudinally through the slot 1 in the under side of
the pipe C is a plate H which is supported within the pipe C by wheels or
rollers I mounted upon a spindle carried by the plate, as shown in Figure 9*.
A bolt J is passed downward through the horizontally bent lower end of the
plate H, and upon this bolt is suspended the beam L, for which purpose the
beam is, in the instance shown, provided with a vertical hole through which
the bolt passes, and the bolt has screwed upon its lower end a nut K provided
with a handle by which it may be readily turned. The nut K serves to support
the beam L, and by it the beam may also be readily raised and lowered. In
Figures 9 and 10, this beam is indicated as being formed of a pipe of similar
size to the pipe C", instead of being formed of a bar, as in Figures 1, 3 and 4.
The particular form of this beam or support is, however, immaterial, and it
may be a wooden beam, a steel bar, a solid rod, or a hollow tube or pipe, as
convenience and attendant conditions may make desirable.
The longitudinal adjustment of the beam in Figures 9 and 10 is effected along
the fixed pipe C, and no provision is indicated for adjustment of the beam
longitudinally relative to its own pivotal support. The adjustment along the
pipe C and around the pivot bolt will in ordinary cases enable the pneumatic
hammer carried by the beam to cover an area containing as many rivets as
one operator can drive in the course of a day's work, the usual practice being to
shift the point of attachment of the beam to the shell of the vessel from one
point to another at the end of a day's work, so that during the day the driving
of the rivets may be carried on uninterruptedly. Should, however, it be desired
to give the. apparatus a still greater range of adjustment, the beam L might,
in Figures 9 and 10, be suspended in a yoke similar to the yoke J of Figure 1,
such yoke being in that case swivelled in the plate H", just as it is swivelled in
the fixed support I in Figure 1. This provision would give the apparatus of
Figures 9 and 10 a much greater range of adjustment than that shown in either
Figure 1 or Figures 9 and 10.
One of the advantages of the arrangement shown in Figures 9 and 10, as there
shown, is that the beam L is at all times pivotally supported at a point near its
middle, and thus the leverage of its arms on opposite sides of its pivot is main-
tained about equal, and greater rigidity of the beam preserved. Under the
arrangement shown in Figure 1, if the beam be adjusted toward the right until
its left hand end is brought adjacent its pivotal support, the leverage thereby
given the portion of the beam at the right of such support is so great that it
requires a very heavy and rigid beam to properly support the parts carried by
the right hand end of the beam while they are in operation.
In Figures 9 and 10, the pneumatic hammer and associated devices are shown
the same as in Figures 1 to 7, but in Figure 11, I have shown a still further
modification of the means for adjustably mounting the pneumatic hammer upon
the end of the beam. In that view, the beam has secured to its right hand end
a circular bracket plate M" provided with a circular track d upon which rests a
circle of anti-friction balls e, which balls serve to support a rotatable circular
plate having a concave upper surface upon which rests the convex under
surface of an annular plate Q surrounding the cylinder A' and in the present
instance formed integral therewith. This plate Q is confined between the
plate P, upon which it rests, and an upper flanged plate R which is bolted
to the plate P near its outer edge. The central openings in both the plates P
and Rare of sufficient size to permit the lower end of the hammer to be swung
freely in any desired direction.
The support for the hammer above described is a substitute for the support
shown in Figures 1 to 8, and the movement of the hammer in operation is
similar in all cases. It is not at all essential in Figure 11 that the plate P be

page_text: mounted upon ball-bearings, or indeed, that it be rotatable at all, since the
movement of the plate Q upon a fixed plate P would answer the purpose.
From the illustrations which have been given of different methods of mounting,
the pneumatic hammer upon the end of the adjustable beam or support, it will
be apparent that there are a variety of ways in which the hammer may be
mounted upon such support in order to give it sufficient freedom of movement
to permit the required manipulation of the riveting die upon the end of the rivet.
In this respect, therefore, my invention is not restricted, in its broader scope, to
any particular means for so mounting the hammer upon the adjustable support,
but contemplates any and all means for so mounting it as will allow it the
necessary freedom of movement for the work it has to do.
While my invention relates more particularly to apparatus for riveting, and
has been so described, nevertheless, it will be apparent that the adjustable beam,
or support and its associated devices may be advantageously employed in other
work than riveting, but more or less analogous thereto. Thus, for instance,
instead of supporting a pneumatic hammer for driving rivets, the beam may
support a rotary pneumatic drill, or other tool which requires to be shifted from
point to point upon the surface of the work.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is
1. The herein described riveting apparatus, comprising an adjustable beam
or support adapted to be detachably secured to the work at different points, and
a pneumatic hammer carried by said beam and having sufficient freedom of
movement thereon to enable it to be properly manipulated upon the point of
the rivet.
2. The herein described riveting apparatus, comprising an adjustable beam or
support adapted to be detachably secured to the work at different points, a
cylinder carried by said beam, and a pneumatic hammer mounted in said cylinder
and pressed to its work by motive fluid admitted to the cylinder, said cylinder
having sufficient freedom of movement upon the supporting beam to enable the
hammer to be properly manipulated upon the point of the rivet.
3. A riveting apparatus comprising an adjustable supporting beam swivelled
upon a support adapted to be detachably secured to the work at different points,
a pneumatic holding device carried by the beam near one end and co-operating
with the surface of the work to hold the beam in fixed position, and a pneumatic
hammer carried by the beam and having sufficient freedom of movement thereon
to enable it to be properly manipulated upon the point of the rivet.
A. A riveting apparatus comprising an adjustable supporting beam swivelled
upon a support adapted to be detachably secured to the work at different points,
a cylinder and piston and rod carried by the beam at one end, intermediate the
latter and the work, for holding the end of the beam in fixed position when
motive fluid is admitted to the cylinder, and a pneumatic hammer carried by
the beam and having sufficient freedom of movement thereon to enable it to be
properly manipulated upon the point of the rivet.
5. A riveting apparatus comprising an adjustable supporting beam swivelled
upon a support adapted to be detachably secured to the work at different points,
a pneumatic holding device carried by the beam near one end and co-operating
with the surface of the work to hold the beam in fixed position, a cylinder also
carried by said beam, and a pneumatic hammer mounted in said cylinder and
pressed to its work by motive fluid admitted to the cylinder, said cylinder having
sufficient freedom of movement upon the supporting beam to enable the hammer
to be properly manipulated upon the point of the rivet.
6. A riveting apparatus comprising an adjustable supporting beam swivelled
upon a support adapted to be detachably secured to the work at different points,
a cylinder carried by the beam near one end and containing a piston having a

page_text: rod projecting from it toward the surface of the work adapted to bear against
the latter when motive fluid is admitted to the cylinder, to hold the beam in
fixed position, a second cylinder carried by said beam, and a pneumatic hammer
mounted in said second cylinder and pressed to its work by motive fluid admitted
to said cylinder, said second cylinder having sufficient freedom of movement upon
the supporting beam to enable the hammer to be properly manipulated upon the
point of the rivet.
7. A riveting apparatus comprising a longitudinally adjustable supporting beam
swivelled intermediate its ends upon a support adapted to be detachably secured
to the work at different points, a distance piece at one end of the beam, between
the same and the surface of the work, means at the opposite end of the beam
for forcing the latter away from the surface of the work and holding it in fixed
position, and a pneumatic hammer carried by the beam and having sufficient
freedom of movement thereon to enable it to be properly manipulated upon the
point of the rivet.
8. A riveting apparatus comprising a longitudinally adjustable supporting
beam swivelled between its ends upon a support adapted to be detachably secured
to the work at different points, a distance piece at one end of the beam between
the same and the surface of the work, a pneumatic holding device at the opposite
end of the beam, for holding the latter in adjusted position, and a pneumatio
hammer carried by the beam and having sufficient freedom of movement thereon
to enable it to be properly manipulated upon the point of the rivet.
9. A riveting apparatus comprising a supporting beam swivelled between its
ends upon a support adapted to be detachably secured to the work at different
points, said beam being adjustable lengthwise of its swivelled support, a distance-
piece carried by the beam at one end, between the same and the surface of the
work, means intermediate the opposite end of the beam and the surface of the
work for forcing the end of the beam away from the surface of the work and
holding it in fixed position, and a pneumatic hammer carried by the beam and
having sufficient freedom of movement thereon to enable it to be properly
manipulated upon the point of the rivet.
10. A riveting apparatus comprising a longitudinally adjustable supporting
beam swivelled between its ends upon a support adapted to he detachably secured
to the work at different points, a distance piece at one end of the beam b ween
the same and the surface of the work, means at the opposite ends of the beam
for forcing the latter away from the surface of the work and holding it in fixed
position, a cylinder carried by the beam, a pneumatic hammer mounted in said
cylinder and pressed to its work by motive fluid admitted to the cylinder, said
cylinder having sufficient freedom of movement upon the beam to enable the
hammer to be properly manipulated upon the point of the rivet.
11. A riveting apparatus comprising a longitudinally adjustable supporting
beam swivelled between its ends upon a support adapted to be detachably secured
to the work at different points, a distance piece at one end of the beam, between
the same and the surface of the work, a pneumatic holding device at the opposite
ends of the beam for holding the latter in adjusted position, a cylinder carried
by the beam, and a pneumatic hammer mounted in said cylinder and pressed to
its work by motive fluid admitted to the cylinder, said cylinder having sufficient
freedom of movement upon the beam to enable the hammer to be properly
manipulated upon the point of the rivet.
12. A riveting apparatus comprising a supporting beam swivelled between its
ends upon a support adapted to be detachably secured to the work at different
points, said beam being adjustable lengthwise of its swivelled support, a distance
piece carried by the beam at one end, between the same and the surface of the
work and holding it in fixed position when motive fluid is admitted to the
cylinder, a second cylinder carried by the beam, a pneumatic hammer mounted
in said second cylinder and pressed to its work by motive fluid admitted to the
cylinder, said second cylinder having sufficient freedom of movement upon the

page_text: beam to enable the hammer to be properly manipulated upon the point of the
rivet.
13. A riveting apparatus comprising an adjustable supporting beam swivelled
between its ends upon a support adapted to be detachably secured to the work
at different points, a caster-wheel or anti-friction roller carried by the beam at
one end and adapted to bear against the surface of the work, means at the
opposite end of the beam for forcing the latter away from the surface of the
work and holding it in fixed position, a cylinder carried by the beam, and a
pneumatic hammer mounted in said eylinder and pressed to its work by motive
Huid admitted to the cylinder, said cylinder having sufficient freedom of movement
upon the beam to enable the hammer to be properly manipulated upon the
point of the rivet.
14. A riveting apparatus comprising a supporting beam swivelled between its
ends upon a support adapted to be detachably secured to the work at different
points, said beam being adjustable lengthwise of its swivelled support, a caster-
wheel, or anti-friction roller carried by the beam at one end and adapted to bear
against the surface of the work, a pneumatic holding device at the opposite end
of the beam for holding the latter in adjusted position, a cylinder carried by
said beam, and a pneumatic hammer mounted in said cylinder, and pressed to
its work by motive fluid admitted to the cylinder, said cylinder having sufficient
freedom of movement upon the beam to enable the hammer to be properly
manipulated upon the point of the rivet.
15. A riveting apparatus comprising the beam L swivelled upon and longi-
tudinally adjustable of the support I adapted to be detachably secured to the
plate A, the caster-wheel M carried by the beam at one end and adjustable in
relation thereto, the cylinder Q and piston rod R carried by the opposite
end of the beam, and the pneumatic hammer mounted in a second cylinder
carried by the last mentioned end of the beam and having sufficient freedom of
movement relatively to the beam to enable it to be manipulated upon the point
of the rivet, as described.
16. A riveting apparatus comprising the beam L suspended in a longitudinally
adjustable yoke J swivelled upon the support I adapted to be detachably secured
to the plate A, the rod N passing through the beam at one end and carrying
the wheel M adapted to hear against the surface of the work, said rod being
adjustable relative to the beam by means of the nut 0, the cylinder Q and piston
and rod R carried by the opposite end of the beam, a second cylinder loosely
hung upon said end of the beam, and a pneumatic hammer mounted in said
second cylinder and pressed to its work by motive fluid admitted to said cylinder,
as described.
17. In a riveting apparatus, the combination of a suitable adjustable support,
and a pneumatic hammer so mounted upon said support as to permit freedom of
movement of one end of the hammer while the riveting die carried by its
opposite end acts upon the point of the rivet.
18. In a riveting apparatus, the combination of a suitable adjustable support,
and a pneumatic hammer carried in a cylinder so mounted upon said support
as to permit freedom of movement of one end of the hammer while the triveting
die carried by its opposite end acts upon the point of the rivet, said hammer
being pressed to its work by motive fluid admitted to said cylinder.
19. In a riveting apparatus, the combination of a suitable adjustable support,
and a pneumatic hammer mounted in gimbals upon said support, permitting
freedom of movement of one end of the hammer while the riveting die carried
by its opposite end acts upon the point of the rivet.
20. In a riveting apparatus, the combination of a suitable adjustable support,
a cylinder mounted in gimbals upon said support, and a pneumatic hammer
mounted in said cylinder and pressed to its work by motive fluid admitted thereto,
the mounting of the cylinder permitting freedom of movement of one end of

page_text: the hammer while the riveting die carried by its opposite end acts upon the
point of the rivet.
21. In a riveting apparatus, the combination of a suitable adjustable support,
a cylinder mounted in gimbals upon said support, suitably applied springs for
yieldingly holding said cylinder in its normal central position in the gimbals,
and a pneumatic hammer mounted in said cylinder and pressed to its work by
motive fluid admitted to said cylinder, for the purpose described.
22. In a riveting apparatus, the combination of a longitudinally adjustable
beam swivelled upon a support detachably secured to the work, and a pneumatic
hammer so mounted upon said beam as to permit freedom of movement of one
end of the hammer while the riveting die carried by its opposite end acts upon
the point of the rivet.
.
23. In a riveting apparatus, the combination of a longitudinally adjustable
beam swivelled upon a support detachably secured to the work, and a pneumatic
hammer carried in a cylinder so mounted upon said beam as to permit freedom of
movement of one end of the hammer while the riveting die carried by its opposite
end acts upon the point of the rivet, said hammer being pressed to its work
by motive fluid admitted to said cylinder.
24. In a riveting apparatus, the combination of a longitudinally adjustable
beam swivelled upon a support detachably secured to the work, and a pneumatic
hammer mounted in gimbals upon said beam, permitting freedom of movement
of one end of the hammer while its opposite end acts upon the point of the rivet.
25. In a riveting apparatus, the combination of a longitudinally adjustable
beam swivelled upon a support detachably secured to the work, a cylinder
mounted in gimbals upon said beam, and a pneumatic hammer mounted
in said cylinder and pressed to its work by motive fluid admitted thereto,
the mounting of said cylinder permitting freedom of movement of one end of
the hammer while the riveting die carried by its opposite end acts upon the
point of the rivet.
26. In a riveting apparatus, the combination of a longitudinally adjustable
beam swivelled upon a support detachably secured to the work, a cylinder mounted
in gimbals upon said beam, suitably applied springs for yieldingly holding the
cylinder in its normal central position in the gimbals, and a pneumatic hammer
mounted in said cylinder and pressed to its work by motive fluid admitted to the
cylinder, for the purpose described.
27. In a riveting apparatus, the combination of the supporting beam L, the
yoke secured thereto, the gimbal frame X having the trunnions or journals V
mounted in the opposite ends of the arms of the yoke P, the cylinder A having
the trunnions or journals Z mounted in the gimbal frame X, the springs Y and Z
applied respectively to the journals and Z, and the pneumatic hammer mounted
in the cylinder, as and for the purpose described.
28 In a riveting apparatus, the combination of a suitable support, a pneumatic
hammer carried in a cylinder so mounted upon said support as to permit freedom
of movement of one end of the hammer while the riveting die carried by its
opposite end acts upon the point of the rivet, and a guide-arm mounted upon the
support and having a guide-opening through which a portion of the riveting die
passes and by which it is held in position on the point of the rivet, said guide-
arm advancing with the die as the point of the rivet is battered down and being
retracted when the die is withdrawn from the point of the rivet.
29. In a riveting apparatus, the combination of a suitable support, a pneumatic
hammer carried in a cylinder so mounted upon said support as to permit freedom
of movement of one end while the riveting die carried by its opposite end
remains in contact with the sivet, and the guide-arm P₁ guided upon the rod R
and having the guide-opening through which the end of the riveting die K¹
passes and in which it is confined, and the resetting spring R¹ applied to the
guide-arm Pl,

page_text: 30. In a riveting apparatus, the combination of the cylinders A¹ and F
connected by the arms D' E¹, the pneumatic hammer having its barrel or
cylinder B mounted in, and longitudinally movable through, the opposite heads
of the cylinder A', and the piston G' secured to the end of the cylinder B' and
fitting in the cylinder F¹, the lower end of the cylinder F communicating by
a passage L' with the interior of the cylinder A¹ and through the ports M¹ with
the interior of the cylinder B₁ of the pneumatic hammer, for the purpose described.
31. In an apparatus of the character described, an adjustable support for the
working tool, consisting of a longitudinally adjustable beam swivelled upon a
support adapted to be detachably secured to the work at different points, and a
pneumatic holding device carried by the beam and co-operating with the surface
of the work to hold the beam in its different adjusted positions.
32. In an apparatus of the character described, an adjustable support for the
working tool, consisting of a longitudinally adjustable beam swivelled between
its ends upon a support adapted to be detachably secured to the work at different
points, a distance-piece at one end of the beam between the same and the surface
of the work, and means at the opposite end of the beam for forcing the latter
away from the surface of the work, to hold the beam in fixed position relative
thereto.
33. In an apparatus of the character described, an adjustable support for the
working tool. consisting of a longitudinally adjustable beam swivelled between
its ends upon a support adapted to be detachably secured to the work at different
points, a distance piece at one end of the beam between the same and the surface
of the work, and a cylinder and piston and rod at the opposite end of the beam,
between the latter and the surface of the work, for forcing said end of the beam
away from the surface of the work, and holding it in fixed position relative
thereto.
34. In an apparatus of the character described, an adjustable support for the
working tool, consisting of a beam swivelled between its ends upon a support
adapted to be detachably secured to the work at different points, said beam being
adjustable longitudinally of its swivelled support, a distance piece carried by
the beam at one end and engaging the surface of the work, and means carried
by the opposite end of the beam for holding the latter in its different adjusted
positions.
35. The combination of the detachable support I the yoke J swivelled therein
and carrying the roller K, the beam L supported in the yoke J upon the roller K,
the caster-wheel M carried by and adjustable in relation to the beam at one end,
and the cylinder Q and piston and rod R carried by the beam at its opposite end
and co-operating therewith and with the surface of the work, in the manner
described.
1
001
1900
F. WISE HOWORTH,
46, Lincoln's Inn Fields, London, W.C.,
Agent for the Applicant.