Improvements in Devices or Means for Covering or Jointing the Ends of Bars or Girders Together, and Means to be Employed in the Manufacture of the said Devices.
Year: 1895

page_text: Date of Application, 21st Feb., 1895°
Complete Specification Left, 18th Nov., 1895-Accepted, 21st Dec., 1895
PROVISIONAL SPECIFICATION.
Improvements in Devices or Means for Covering or Jointing the
Ends of Bars or Girders Together, and Means to be Employed in
the Manufacture of the said Devices.
I, JOSEPH THOMAS ANDREWS of 51 Blackheath Road Greenwich in the
County of Kent, Engineer, do hereby declare the nature of this invention to
be as follows:-
My invention relates to devices or means whereby girders or the like metal
articles can be joined together and consists in providing covering pieces which
are formed upon a matrix so that they truly fit over the girder ends or the like
to be covered or joined. For example where the girders or the like are of what
is known as tee section the covering pieces can be of like section as regards the
recess so as to fit the underside of or around the tee girder, in the former case the
joint being covered by a flat plate. If the girder or the like be of joist section
the cover will be made to correspond or two covers may be made to fit on at each
side and each of these covers will be suitable for a girder or the like of channel
section and so in all cases the covers will be made of a shape corresponding with that
of the particular girders with which they are to be used. The covers can be con-
veniently formed by bending a plate in a hydraulic or other press provided on the
one part with a piece of a shape corresponding with the shape of the girder and on
the other part with counter-portions so that when the parts are brought together
with the plate between them the said plate will be bent to the requisite shape.
Dated this 21st day of February 1895.
JOHNSONS & WILLCOX,
47 Lincoln's Inn Fields, London, W.C., Agents for the Applicant.
Improvements in Devices or Means for Covering or Jointing the
Ends of Bars or Girders Together, and Means to be Employed in
the Manufacture of the said Devices.
I, JOSEPH THOMAS ANDREWS, of 51 Blackheath Road, Greenwich, in the
County of Kent, 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 to devices or means whereby girders or the like metal
articles can be joined together and consists in providing covering pieces which are
formed upon a matrix so that they truly fit over the girder ends or the like to be
covered or joined. For example where the girders or the like are of what is
known as tee section the covering pieces can be of like section as regards the
recess so as to fit the underside of or around the tee girder, in the former case the
joint being covered by a flat plate. If the girder or the like be of joist section
the cover will be made to correspond or two covers may be made to fit on at each

page_text: side and each of these covers will be suitable for a girder or the like of channel
section and so in all cases the covers will be made of a shape corresponding with
that of the particular girders with which they are to be used. The covers can be
conveniently formed by bending a plate in a hydraulic or other press provided on
the one part with a piece of a shape coresponding with the shape of the girder and
on the other part with counterportions so that when the parts are brought together
with the plate between then the said plate will be bent to the requisite shape.
And in order that my said invention may be clearly understood I shall now
proceed more particularly to describe the same and for that purpose shall refer to
the several figures on the annexed drawings the same letters of reference indicating
corresponding parts in all the figures.
Figure 1 is a side elevation and Figure 2 a transverse section of portions of two
lengths of I shaped girders or joists joined together according to my invention.
Figures 3 and 4 are similar views showing my invention applied to girders of
tee section and
"
Figures 5 and 6 are similar views showing my invention applied to bars or girders
of channel section.
Figure 7 is a side elevation of a press suitable for forming the joint covering
pieces.
Figure 8 is a perspective view of one of the said covering pieces suitable
for girders of I section or of channel section and
Figure 9 is a perspective view of a covering piece suitable for girders of "tee"
section.
To form the covering pieces according to my invention I provide
on the bed A
of the press a matrix B which may consist of a portion of one of the bars or
girders to be joined and on the head C of the press are provided blocks D
constituting the counterpart of the matrix to give to the plates the required shape:
to form the covering of the joint. Plates E of the required size to form the
covering pieces for the joints are heated to the required temperature and placed one
at a time while hot on the matrix B the head C of the press being then caused to
descend or the bed A of the press caused to rise as found most convenient so as to
nip the plate between the matrix B and the blocks D thereby bending the said
plate to the shape of the matrix B. The head of the press is then raised or the
bed of the press lowered, as the case may be, the shaped cover piece being then
removed from the matrix and another hot plate placed in position to be bent the
operation herein before described being then repeated. By bending the plates in
the manner described on a portion of the bar or girder as a matrix, accuracy of fit
between the cover plates and the bars or girders is ensured and a considerable
saving in the cost of making the cover plates is effected, as the necessity for
providing specially made matrices for the purpose is dispensed with.
The matrix B shewn in the press is suitable for forming covering plates for
channel bars or girders, or for the joints of I girders as shewn in Figures 1 and 2, a
covering piece F of channel form being placed on both sides of the girders as shown
in Figures 1 and 2 and also by full lines and dotted lines in Figure 8.
In the case
of "tee" bars or girders or channel girders the flat side of the girders at the joint
is covered by a flat plate as shown at F' in Figures 4 and 6. The covering pieces
may where necessary be bolted or rivetted in place on the bar or girder.
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. For joining the contiguous ends of metal bars or girders covering pieces
formed by bending metal plates on a matrix such that the said covering pieces will
accurately fit the bars or girders or the like to be joined substantially as herein
before described.
org
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2. For joining the contiguous ends of bars or girders of I section, covering pieces
formed by bending metal plates on a matrix of the exact shape of the bars or

page_text: girders so that the said covering pieces will accurately fit in the recesses and over
the flanges of the girders, a covering piece being placed on each side of the bars
or girders at the joint substantially as described and illustrated in Figure 1 of the
accompanying drawings.
"
3. Covering pieces for the joints between the contiguous ends of metal bars or
girders of " tee
shape or of channel shape the covering pieces for the flat sides
of the bars or girders being flat plates and the covering pieces for the opposite
sides of the bars or girders being shaped on or in a matrix so as to accurately fit
the webs of the said bars or girders substantially as hereinbefore described
and illustrated by Figures 3 and 4, and Figures 5 and 6 of the accompanying.
drawings.
Dated this 18th day of November 1895.
JOHNSONS & WILLCOX,
47 Lincoln's Inn Fields, London, W.C., Agents.