IMPROVEMENTS IN THE METHOD OF AND APPARATUS FOR RIVETTING BY WATER, AIR, STEAM, OR OTHER POWER
Year: 1881

page_text: PROVISIONAL SPECIFICATION left by Frederick Arthur Paget at the Office
of the Commissioners of Patents on the 27th July 1881. A communication
from abroad by John Haswell, Director of the Engine Works of the State
Railway, Vienna.
FREDERICK ARTHUR PAGET, of 158, Fenchurch Street, London, and 13, Riemer
Gasse Stadt, Vienna. "IMPROVEMENTS IN THE METHOD OF AND APPARATUS FOR
RIVETTING BY WATER, AIR, STEAM, OR OTHER POWER." A communication from
abroad by John Haswell, Director of the Engine Works of the State Railway,
Vienna.
In the ordinary method of rivetting by hydraulic or other power, it has been
usual to carry out the same process as in hand rivetting, by which rivets with one
head are held up to have the second head formed after insertion in the plates to be
rivetted. With hand rivetting, this is a necessity of the case. Now these
improvements relate to a novel method of rivetting, in which by the use of
hydraulic or other power both the beads of the rivets can be formed simultaneously
on both sides of the plates. By this means, instead of a rivet with one head,
merely a pin, or short length of rivet iron without a head, is necessary for
the beginning of the operation, and the work is found to be both better and
cheaper.
In carrying out this process, the two plates being rivetted have to be held
between the moveable rivetting tool and the fixed rivetting tool in such wise that
there is the same length or amount of riyet iron projecting from each side,
such length being so proportioned as to 'be sufficient for each head and no
more.
It
This object is attained by means of what I term a holder. This is an apparatus
fitted in or on the top of the hob or head which holds up the fixed rivetting tool. It
consists of a horizontal bar, the fore part of which, where it comes into contact
with and holds at the proper distance the plates to be rivetted, may be forked.
thus extends on each side of and projects somewhat beyond the fixed rivetting
tool. A portion of this bar is screwed, so that the fork may be set by means of a
nut in a position further in or out relatively to the end of the fixed rivetting tool.
The position of the holder can thus be adjusted according to the quantity of iron
necessary for each diameter of rivet and each shape of rivet required.

page_text: The plated structure being thus held at the suitable distance from the two ends
of the short length of red hot rivet iron, on the pressure being put on the plunger
the moveable rivetting tool advances until both heads are made. It then becomes
necessary to take the holder out of the way of the rivet heads, so that the next
rivet may be formed.
For this purpose the forked holder is held against the work by a spring, which
is compressed when it is wished to draw the holder back, by means of link work
actuated by a chain connected to a band lever accessible to the workman having
the control of the hydraulic plunger.
The holder is thus worked to and fro quite independently of the motion of the
piston or plunger impelling the moveable rivetting tool.
It is evident that the said holder could also be adjusted and taken back by
means of a small hydraulic plunger or other suitable means.