Year: 1887

page_text: Date of Application, 23rd Feb., 1887
Complete Left, 22nd Nov., 1887
Complete Accepted, 23rd Dec., 1887
We, RALPH HART TWEDDELL of No. 14 Delahay Street, Westminster in the
County of Middlesex, Engineer, JAMES PLATT and JOHN FIELDING both of Atlas
Works, Gloucester, Engineers do hereby declare the nature of this invention to be as
follows:-
Our invention relatos to punching and rivetting machines of the kind in which a
punching or rivetting tool attached to a piston or plunger acted on by hydraulic or
other fluid pressure is made to advance against and punch a plate or form the head of
a rivet which is held by an abutting tool at its other side or end. Our object is to
construct these machines in a form such as renders them easily applicable for punching
or rivetting at the angles, ends or other parts of boilers or of other structures where
the abutting tools of ordinary punching or rivetting machines cannot be applied.
For this purpose we fix the cylinder in which the fluid pressure acts at the one end
of a girder, the punching or rivetting tool being directed from the end backwards
parallel to the girder. At the other end of the girder we make a projecting bracket
which can enter a hole of moderate size in the shell of the boiler or structure when
the girder is placed parallel or nearly so to that part of the shell in which the hole is
formed. To this projecting bracket, when it has been passed through the hole, we
attach the abutting tool which with its holder is made of such length that it extends
up
to and bears against the plate or rivet that is to be acted on. Preferably we joint
the holder of the abutting tool to the bracket so that it can be turned to a position at
right angles to the girder, and when in this attitude it has been passed through the
hole in the shell, it is turned on its joint to a position parallel to the girder, thus
extending towards the plate or rivet which it has to abut.
ABEL & IMRAY,
Agents for the Applicants.

page_text: COMPLETE SPECIFICATION.
An Improvement in Punching and Rivetting Machines.
We, RALPH HART TWEDDELL, of No. 14 Delahay Street, Westminster, in the
County of Middlesex, Engineer, JAMES PLATT, and JOHN FIELDING, both of Atlas
Works, Gloucester, Engineers, 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:
Our invention relates to a punching and rivetting machine of the kind in which a
punching or rivetting tool attached to a piston or plunger acted on by hydraulic or
other fluid pressure is made to advance against and punch a plate or form the head of
a rivet which is held by an abutting tool at its other side or end. Our object is to
construct these machines in a form such as renders them easily applicable for punching
or rivetting at the angles, ends or other parts of boilers or of other structures where
the abutting tools of ordinary punching or rivetting machines cannot be applied.
For this purpose we fix the cylinder in which the fluid pressure acts at the one end of
a girder, the punching or rivetting tool being directed from the end backwards parallel
to the girder. At the other end of the girder we make a projecting bracket which
can enter a hole of moderate size in the shell of the boiler or structure when the girder
is placed parallel or nearly so to that part of the shell in which the hole is formed.
To this projecting bracket, when it has been passed through the hole, we attach the
abutting tool which with its holder is made of such length that it extends up to and
bears against the plate or rivet that is to be acted on. Preferably we joint the holder
of the abutting tool to the bracket so that it can be turned to a position at right
angles to the girder, and when in this attitude it has been passed through the hole in
the shell, it is turned on its joint to a position parallel to the girder, thus extending
towards the plate or rivet which it has to abut.
Figure 1 of the accompanying drawings represents a section of part of a boiler or
vossel with a machine according to our invention applied for punching or rivetting
near one angle. Figure 2 is a plan partly in section of the abutment arm of the
machine. A girder A carries at its one end the hydraulic cylinder B, from the
plunger of which projects the punching or rivetting tool M working through a guide N.
To the other end of the girder A between two cheeks C is jointed the abutment arm I
within which the abutting tool K can be adjusted longitudinally and secured by a
cotter L passed through holes in the shank of K and in the sides of the arm 1, these
holes being so spaced that one or other of them is suitable for the desired position
of K. In the shell D E of the boiler or vessel there is a hole F through which the
arm I can be passed when it is turned on its joint to a position such as is indicated by
the dotted lines 1'. It is then turned upwards to a position at right angles to the
plate D to which the rivets H are to be applied. The arm I being secured in this
position by bolts G, the tool K carried by it serves as an abutment when the tool M.
advances to punch a hole or to head a rivet H.

page_text: Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
The construction and use of a hydraulic punching and rivetting machine wherein
the cylinder with the punching or rivetting tool is fixed at one end of a girder, and
an abutment arm is jointed to the other end of the girder, in such manner that the
arm when turned to one position can be introduced through a hole in the shell of a
boiler or vessel, and can then be turned so as to present its abutment tool inside in
line with the punching or rivetting tool outside, substantially as described.
Dated this 22nd day of November 1887
•
ABEL & IMRAY,
Agents for the Applicants.