Improvements in Combined Punching and Riveting Machines.
Year: 1888

page_text: COMPLETE SPECIFICATION.
Improvements in Combined Punching and Riveting Machines.
I, HEINRICH SPÜHL of 'St. Fiden near St. Gallen, Switzerland, Mechanician 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 to machines for punching the holes in and riveting sheet
iron pipes, and has for its object puuching all the holes in one length of pipe, at one
operation on one side of the machine whereupon it is placed on the other side where
all the rivetes are placed in position and riveted at one operation. The row of
punches and riveters are worked by revolving excentric shafts and tappets on interme-
diate shafts so arranged that only a certain number of the punches or riveters descend
at the same time, so that too great a strain is not brought to bear on the machine.
This machine is intended both for punching and riveting according to the dies used
in the stamps.
A double machine is shown in the drawings that is, the holes are punched on one
side of the machine and the riveting done on the opposite side.
In order to make my invention more clear, I refer to the accompanying drawings
which form part of this present specification and in which similar letters denote
similar parts throughout the different figures.
Fig. 1 is a front view of my improved machine.
Fig. 2 is an end view of the same.
Fig. 3 is a top view of the same.
Figs. 4 to 10 are detail views.
The construction of the machine is as follows:
B B' are two excentric shafts with a number of connecting rods E according to the
number of punches and riveters.
The connecting rods E E are each fitted with a lng e at their lower end, which
slides in the slots in the die holders F. The upper forked end of the die holders
carries the stop pieces G which are hinged at g. The under parts F. of the punches
and riveters are guided in the guide pieces CC respectively. The arms J, which are
movable round the shaft H, are furnished with a recess and a nose j¹. There is one

page_text: of these stop pieces G to each punch and riveter. On the intermittently revolving
shaft K are fastened the tappets kk one behind the other (as to be seen in figs. 3
and 4) in pairs, so that only two of them can be brought into action at the same time.
The shaft K is driven from the shaft B by the crank M, which is connected by the
slotted connecting rod n to the double lever n' which moves loosely on the shaft K.
The lever n moves the ratchet wheel n² by the pawl n³; the ratchet wheel n³ has eight
teeth, seven of them being of the same size and pitch while the eighth is longer.
The working of the machine is as follows:
The sheet iron pipe, after being rolled round, is placed on the shaft D, which is
movable round the pin a, (fig. 3) and held fast between the arms a² a³ which are on
the standards A A¹ A² of the machine.
The shaft D is brought into the position as seen by D¹ in fig. 3 and the hand lever L
(fig. 2 is lowered, and the ratchet wheel n² and the shaft K moved a portion of a
revolution round, by means of the rod and spring pawl 12; the lever / keeping the
pawl always against the ratchet whool n².
In lowering the lever L the shaft. 1) is fixed fast in its place, and the shaft K turned
round, so that two of the tappets & are brought to hear against two of the stop pieces G
and move them into the position as shown in fig. 2.
When the excentric shaft B
is revolved, those excentric rods E belonging to the two stamps F whose stop pieces G
were brought into a vertical position, will come against these said stop pieces and
depress the punches or riveters as the case may be. It is clear that the shafts D
and D must be fitted with corresponding rivet snaps and dies.
During the motion of these two stamps all the others are held stationary in their
highest position by the arms J, which catch on the cross pieces of the forked ends
of the stamps F (as seen in fig. 4). The projection secures the stops G in their
position when out of gear, so that the upward and downward motions of the connect-
ing rods EE do not move the stamps F. The stamps F are always held in their
upmost position when the stops G are thrown out of gear, as the arm J at the same
time throwing the stop G out of gear catches on the cross pieces f³ and supports the
stamps.
During the upward motion of the stamps the tappet shaft must be moved a certain
distance round and the stop pieces G put out of gear; this is brought about by the
ratchet wheel n² which brings the tappets & intermittently against the different stop
pieces.
When all the seven pairs of stamps have been depressed either to punch the holes
or for riveting, the ratchet wheel n² comes into such a position that the pawl n³ lies on
the long tooth 8, and although the pawl n³ moves back and forward, it does not
advance the ratchet wheel as its stroke is regulated by the opposite free end of the
lever n' which abutts against the stop . The tappet shaft K remains stationary with
the space a opposite the stop pieces G and although the shafts B and B are continually
revolving and the connecting rods EE moving up and down the stamps F F¹ do
not move.
The shaft D can be moved to the side by lifting the lever L, so that the sheet iron
pipe d may be removed; when the lever L is lifted the spring pawl 12 catches on the
tooth 4 of the ratchet wheel n² and when the shaft D is again placed in position with
a new pipo on it and fastened in its place by lowering the lever L, the ratchet wheel n
is moved sufficiently round, so that the pawl n³ catches on the tooth 8 and sets the
machine in motion again.
The motion of the stop pieces G is guarded by small plates g¹ (figs. 4 and 5). The
ratchet wheel n² is made in two parts (fig. 7) for the purpose of adjustment for the
two pawls n³n; n³ is a pawl to prevent the ratchet wheel from running back.
There is a hole o8 (fig. 5) punched in each end of the pipe which serves as a mark
in placing the pipe on the riveting side of the machine, the dies oolie below each
punching stamp and the flat plates o¹ o¹ below the riveters against which the rivets are
Hattened. When the pipe is placed on the riveting shaft D¹, it rests on the two
springs and the rivets are placed in the holes and held in its proper place by the
guides P P¹

page_text: Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is:
1) In riveting or punching machines a number of stamps worked from excentrics,
cranks or an excentric shaft, the stamps being connected to said excentrics, cranks or
excentric shafts by connecting rods or other suitable means, and each stamp fitted with
a stop which is thrown into gear by tappets on a revolving shaft, in such a manner
that the whole or any number of the said stamps can be brought into gear and made
to descend at pleasure according to the position of the tappets on said revolving shaft.
The stamps.being held in their topnost position when not in action by catches which
are pressed against the stop pieces and come into action when the said stop pieces are
thrown out of gear, substantially and for the purpose as described.
2) In riveting or punching machines the above described mechanism either singly
or in duplicate in combination with one or two hinged shafts on which the worked to
be punched or rivited is placed, the said hinged shafts being fastened in place by a
hand lever, which on being lowered sets the machine in motion, substantially and for
the purpose as described.
3) In punching and riveting machines the excentric shaft B with connecting rods E,
stamps F, stop pieces G, which are brought into action by the tappets & on the
shaft K which is set in motion from the shaft B by the crank M and slotted connect
ing rod; ratchet wheels n² pawls n³ 12, levers n¹, L, connecting rod, shaft H with
stop pieces J, journalled shaft D and driving wheels 162, substantially and for the
purpose as described.
4) The above described mechanism in duplicate fitted to the frames A A¹ A³, one
side for punching and the other for riveting, substantially and for the purpose as
described.
"
5) In riveting machines the dies oo' on the "holderup" in combination with the
spring rests for the purpose of holding the work away from the riveting "snap
or die when the rivet is put in place, thus allowing of a complete head being formed
on the underside of the work, substantially as described.
Dated Berlin, this 16th day of November 1888.
.