Improvements relating to Pneumatic Rivetting Apparatus.
Year: 1899

page_text: Date of Application, 21st Nov., 1899
Complete Specification Left, 24th Nov., 1899-Accepted, 27th Jan:, 1900
PROVISIONAL SPECIFICATION.
Improvements relating to Pneumatic Rivetting Apparatus.
I, HENRY JAMES KIMMAN, of 1235, Lawndale Avenue, Chicago, Cook County,
Illinois, United States of America, Machinist, do hereby declare the nature of
this invention to be as follows:-
My invention has reference to pneumatic rivetting apparatus and consists in
first providing that the plates shall be held fast together by a clamping device
and that when in such position the hammer action of the riveter shall com-
mence. to operate.
My invention consists in the ordinary yoke having at one end instead of the
pneumatic plunger device a fixed rivet head receiver or holder which is part
and parcel of the yoke and is not operated by power at all; at the other side of
the yoke I provide means for holding in position what is practically, a pneumatic
hammer, but in front of the hammer I arrange a circular clamping device. The
back of the hammer is arranged so that it moves about a guide attached to the
retaining piece and the front end of the projecting end forms the wall of the air
receiving chamber in the back of the hammer. Around the cylinder is arranged
a ring screwed or otherwise permanently fixed to a disc guiding piece whose
ends are over and keep in position the clamping device. A spring is interposed
between the clamping device and the smaller diameter of the disc guiding piece
to return the clamping device to the normal position. Air is admitted by an
ordinary throttle valve and is allowed to flow in three directions, in one direction
into the air receiving chamber at the back of the hammer to force the hammer
and its guiding piece forward, in the second direction between the clamping
piece so as to force the same forward to permanently close the plates
(said plates being retained in that position until the operation is finished) and
in the third direction back of the easing in the hammer to the automatic distribu-
ting valve of the hammer giving the reciprocating motion thereto. When the
rivetter is required to perform its work the permanent dolley bar or holder on
previously referred to is brought right up against the plates and the throttle
valve is moved to admit air to the clamping device, which is forced forward
forcing the plates together and keeping them in that position; the air in the air
chamber at the back of the hammer operates to force the hammer further up
to its work at every blow, and the hammer itself is operated through the dis-
tributing valve previously referred to. It will thus be seen that firstly any in-
equality in the plates or any striking of the rivet head before the plates are
together is avoided inasmuch as the plates are first of all clamped together, the
hammer being then set in motion to create the rivet head and at the same time
forced forward at every blow on the rivet by means of the pressure in the chamber
at the back.
I am aware that means have been provided before for initially forcing the
hammer forward to its work, as shown in Haddan's Specification No. 9769 of

page_text: A.D. 1899. The evil of this appliance is that if the permanent plunger or dolly
is not up to the plates holding the rivet the first blow of the hammer will start
the rivet head and the plates not being together shoulders will be formed between
and behind the plates as no plate closing device is provided, such device relying
upon the fact that the hammer is enclosed within a cylinder.
With my invention the hammer is not enclosed within the cylinder at all. My
invention also provides that the disadvantage above referred to in respect of the
prior specification is obviated through the clamping device first clamping the
plates together before the hammer is set in motion to start the rivet head, the
rivet head being then started, and the hammer finally fed to its work as the rivet
becomes shorter.
Improvements relating to Pneumatic Rivetting Apparatus.
I, HENRY JAMES KIMMAN, of 1235, Lawndale Avenue, Chicago, Cook County,
Illinois, United States of America, Machinist, 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 folowing statement:-
My invention has reference to improvements in pneumatic rivetting apparatus
and consists in providing that the plates shall be held fast together by a clamp-
ing device and that when in such position the hammer action of the rivetter
shall commence to operate.
My invention consists in the ordinary yoke having at one end instead of the
pneumatic plunger device, a fixed rivet head receiver or holder on which is part
and parcel of the yoke and is not operated by power at all; at the other side of
the yoke I provide means for holding in position what is practically a pneumatic
hammer, but in front of the hammer I arrange a circular clamping device. The
back of the hammer is arranged so that it moves about a guide attached to the
retaining piece and the front end of the projecting end forms the wall of the air
receiving chamber in the back of the hammer. The coupling sleeve referred
to and shown in the Prior Specification of Letters Patent granted to me No. 9239
of 1899 is prolonged in the present invention and forms a cylinder, and the ends
of said cylinder are over and keep in position the clamping device, forming a
guide therefor. At the back of the said coupling sleeve is provided a lock-nut
or any form of locking device to prevent the movement of the said cylinder. A
spring is interposed between the clamping device and the inner side of the
cylinder formed by the prolongation of the coupling sleeve. Air is admitted by
an ordinary throttle valve and is allowed to flow in three directions, in one direc-
tion into the air receiving chamber at the back of the hammer to force the
hammer and its guiding piece forward, in the second direction behind the clamp-
ing piece so as to force the same forward to permanently close the plates (said
plates being retained in that position until the operation is finished), and in the
third direction back of the casing in the hammer to the automatic distributing
valve of said hammer giving the reciprocating motion thereto.
I will now describe my invention with reference to the accompanying draw-
ings, in which-
Figure 1 is a general view showing the clamping device and the hammer in

page_text: section. In this figure the fixed rivet head receiver or holder-on is shown with
the rivet in position through the plates to be rivetted, and the device is shown
in its normal condition.
Figure 2 is a view of the machine similar to that shown in Figure 1, but the
clamping device is shown forward in operation and the hammer is shown
moved forward into its worked position ready to start the rivet head.
figure the apparatus is also shown partly in section.
In this
Figure 3 is a section on line A-A Figure 1, showing the connection from the
controlling valve to the distributing valve of the hammer, and also the air pass-
ages to both the cylinders, that is, the cylinder of the hammer and the cylinder
formed by the extension of the coupling sleeve.
The same letters refer to the same parts in the several figures of the drawing.
a is the ordinary yoke as now similarly used. The shape of this yoke is not
material to the invention.
e is
is the permanent extension of the left hand side of the yoke the front end
of which 6, forms the retaining side for the air chamber, c, d is the extension
at the back of the hammer forming the guiding pieces surrounding and also
in its forward movement the air chamber for moving the hammer forward.
the cylinder of the hammer, el is the locking device, f is the extension of the
coupling sleeve turned at the end ƒ¹ holding the clamping device g in position
and forming its guide. is the spring for returning the clamping device to its
normal position when the air is cut off and the operation has ceased. is the
hammer piston i the tool head shaped to form the head of the rivet. is a
port being the main source of supply from the controlling valve this port
extends to and is the means for admission of air to force the clamping device g
forward to the position shown in Figure 2. A cross passage from the passage
formed between the ports rises to the hammer distributing valve said pass-
age (shown in Figure 3) being for operating the distributing valve passages Im
are respectively for the exhaust and supply, the same as in my above cited prior
Specification No. 9239 of A.D. 1899.
the rivet head receiver or holder-on.
containing the fixed holder-on.
together.
is the rivet. is a duplicate of 7 and is
o is the other end of the yoke or means
are the plates required to be rivetted
The working of my invention is as follows:-
The plates pp being as shown in Figure 1, the permanent holder-on is brought
up to the rivet head and pressure is admitted (by moving the main controlling
valve into the passage forcing the whole apparatus forward will the tool
to form the rivet head is moved over the rivet end in contact therewith forcing
the rivet up to the permanent holder-on at the same time air is admitted
through the passage between and j¹ forcing the clamping device g forward as
shown in Figure 2 to close and permanently hold the plates in position and force
said plates in contact with the rivet head. The further operations of the machine
consist in the ordinary reciprocating motions of the hammer piston by the air
passing by the passage into the distributing valve and setting the hammer
piston in motion and this operation continues until the rivet is closed. As the
rivet gets shorter the air chamber being constantly open to pressure
the hammer is fed forward up to its work, the plate closer retaining its position
until the operation is finished.
It is obvious, as herein before mentioned, that I do not claim any particular
form of yoke and that my invention consists in the working parts (and not in the
shape for holding the machine to its work. I am also aware that means have been
provided before for forcing the hammer forward to its work, but in these in-
instances a cylinder surrounds the hammer the latter moving longitudinally there-
with, and no plate closing device is provided. If the permanent plunger or
dolly bar is not up to the plates holding the rivet the first blow of the hammer
will start the rivet head and the plates not being together shoulders will be
formed between and behind the plates.

page_text: With my invention the hammer is not enclosed in any cylinder at all. My
invention practically consists in prolonging the coupling sleeve of my ordinary
hammer and forming therein a cylinder for working the clamping device and
I also provide an air chamber at the back of the hammer, the whole device
moving forward.
•
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I wish it to be dis-
tinctly understood that I do not claim the mere withdrawing from the holder-on
end the pneumatic cylinder previously used, neither do I claim the hammer oper-
ation per se at the other end as both of these are old, but what I do claim is:
1. In a pneumatic rivetter, a clamping device additional to the hammer and
operating independently thereof: substantially as described for the purpose
specified.
2. In pneumatic rivetting apparatus, forming the end of the hammer into an
air chamber, substantially as herein described for the purpose specified.
3. In pneumatic rivetting apparatus extending the coupling sleeve to form a
cylinder, the inner wall being the outside of the hammer cylinder, and a circular
clamping device the latter adapted to be moved forward by the admission of air
into the said cylinder substantially as described.
Dated this 24th day of November 1800.
JOHN P. O'DONNELL, Fel. Chart. Inst. P.A.,
Agent for Applicant, Palace Chambers, Westminster, S.W.