Grip Plates for Attaching Hangers, Brackets, or other Attachments to Girders, Rolled Joists or Beams.
Year: 1897

page_text: Date of Application, 26th Mar., 1897
Complete Specification Left, 16th Dec., 1897-Accepted, 26th Mar., 1898
PROVISIONAL SPECIFICATION.
Grip Plates for Attaching Hangers, Brackets, or other Attachments
to Girders, Rolled Joists or Beams.
WILLIAM BORROWS, Mechanical Engineer, Providence Foundry & Locomotive
Works, Sutton, St. Helen's Lancashire, do hereby declare the nature of this inven
tion to be as follows:
-
That the bracket, hanger or other attachments are fixed to girders rolled joists
or beams with a grip plate secured with bolts and firmly gripping the girder rolled
joist or beam.
Grip Plates for Attaching Hangers, Brackets, or other Attachments
to Girders, Rolled Joists or Beams.
I, WILLIAM BORROWS, of Providence Foundry and Locomotive Works, Sutton,
St. Helen's, in the County of Lancaster, 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:-
This invention has for its object an arrangement whereby girders can be attached
to each other without bolts being passed through them and weakening them and
also hangers can be attached to the under-side of girders in the same manner.
The invention is best described by aid of the accompanying drawing, which,
shows first two girders A and B resting on a girder C and all of them united
together by my invention, also a hanger D suspended from the lower girder C. The
invention practically consists in forming lap plates E resting against either other
lap plates or the girder or hanger with a considerable width of flat surface in each,
bearing against the other; and a projection from the lap plate passing over the
edge of the girder. Bolts passing through the lap plate and the hanger or the two
lap plates complete the whole.
Although I have mentioned that the two lap plates or the lap plate and hanger
have a considerable surface in juxtaposition, it is obvious that provided the two
outer edges always meet and the inner edge of the lap plate considerably laps over
and rests on the girder or on the other lap plate it is immaterial whether these
surfaces are together over their entire area where it is not touching the girder, and
in practice it is actually better that the two surfaces should not come quite in
contact except at their extreme distance from the girder as by this means nearly
half the entire strength of the bolt is spent in gripping the girder, whereas if the

page_text: two surfaces come absolutely together it might frequently happen that the grip
plate was loose on the girder. In the drawing practically two different adaptations
of my invention are shown, one where the ends of two girders rest on and are
attached to a girder by my invention, and the other where a hanger is attached to
the girder. I have also shown on top two further pairs of grip plates which in the
position shown strengthen the joint of the two top girders and make them more
nearly a continuous girder. If however the four grip plates on the upper flange
were moved along the top of one of the upper girders they could be used for
gripping another transverse girder.
Having now particularly described and ascertained the nature of my said in-
vention and in what manner the same is to be performed, I declare that what I
claim is:-
-
1. The arrangement substantially as described whereby two structural parts,
or parts of machinery one of them being of the nature of a girder or beam, can be
firmly gripped the one to the flange of the other without the bolts passing through
said flanges.
2. The combination of a girder or other flanged structure another structure with
its surface fitting against and across said girder and two grip plates gripping the
two flanges of the girder and resting against such other structure and held together
by belts substantially as described.
D
1511
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100%
WM. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool, Patent Agents for the Applicant.