AN IMPROVEMENT OR IMPROVEMENTS IN SCREW BOLTS
Year: 1885

page_text: I THOMAS BUDWORTH SHARP of French Walls Smethwick in the County,, of
Stafford Mechanical Engineer do hereby declare the nature of the said Invention.
for "AN IMPROVEMENT OR IMPROVEMENTS IN SCREW BOLTS to be as follows:-
My invention has, reference principally to screw bolts of the kind called eye
bolts that is bolts having a screw at one end and a circular eye or loop at the
other end. My invention is however applicable to screw bolts having other kinds,
of heads.
Instead of making screw bolts from cylindrical rods of metal screwed at one end.
and headed at the other I make screw bolts from rods semi cylindrical in cross
section the said semi cylindrical rods being treated in the manner herein after,
explained.
:
I will describe my invention in connection with the manufacture of an eye
Bcrew bolt.
I take a semi cylindrical rod of a length about double the length of the screw
bolt to be made, I fold or double the said rod upon itself at its middle by bending
it round a cylindrical rod or core having the diameter of the eye in the screw bolt
to be made. The flat face of the rod is in the bending process presented to the,
core on which the bending is effected so that the flat faces of the two parallel
branches of the bent rod are in contact and the said two branches constitute,
a cylinder divided longitudinally by the plane in which the axis of the cylinder, is
situated. The screw is made on the end of the bolt in the usual way and when
the bolt is in use the screw nut can be fixed in position and its accidental removal
prevented by expanding or opening out the part protruding beyond the screw nut.
My improved bolt may be used as a set pin or stud..
My improved screw bolt may be made while the metallic rod is in a hot or cold
state according to the nature of the metal or alloy.
Where instead of a head of an eye form some other shaped head is required it
may be made by operating on the eye shaped head by pressure or percussion. Or
it may be produced direct from the doubled semi cylindrical rod so as to dispense
with the intermediate bending over the cylindrical core.
Should it be desirable for any purpose that some portions of the semi cylinder
should be permanently connected this may be done by welding, brazing, or,
otherwise according to the nature of the metal or alloy of which the screw bolt.
is made.

page_text: An Improvement or Improvements in Screw Bolts.
I THOMAS BUDWORTH SHARP of French Walls, Smethwick in the County of
Stafford, Mechanical Engineer do hereby declare the nature of the said 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 has reference principally to screw bolts of the kind called eye
bolts, that is, bolts having a screw at one end and a circular eye or loop at the
other end. My invention is however applicable to screw bolts having other kinds
of heads.
"
Instead of making screw bolts from cylindrical rods of metal screwed at one end
and headed at the other I make screw bolts from rods semi-oylindrical in cross
section the said semi-cylindrical rods being treated in the manner hereinafter
explained.
I will describe my invention in connection with the manufacture of an eye
screw bolt
I take a semi-cylindrical rod of a length about double the length of the screw
bolt to be made. I fold or double the said rod upon itself at its middle by bending
it round a cylindrical rod or core having the diameter of the eye in the screw bolt
to be made. The flat face of the rod is in the bending process presented to the
core on which the bending is effected so that the flat faces of the two parallel
branches of the bent rod are in contact and the said two branches constitute a
cylinder divided longitudinally by the plane in which the axis of the cylinder is
situated. The screw is made on the end of the bolt in the usual way and when
the bolt is in use the screw nut can be fixed in position and its accidental removal
prevented by expanding or opening out the part protruding beyond the screw nut.
My improved bolt may be used as a set pin or stud.
My improved screw bolt may be made while the metallic rod is in a hot or cold
state according to the nature of the metal or alloy.
Where instead of a head of an eye form some other shaped head is required.it
may be made by operating on the eye shaped head by percussion or pressure. Or
it may be produced direct from the doubled semi-cylindrical rod so as to dispense
with the intermediate bending over the cylindrical core.
Should it be desirable for any purpose that some portions of the semi-cylinder
should be permanently connected this may be done by welding brazing or
otherwise according to the nature of the metal or alloy of which the screw bolt
is made.
•
Figure 1 of the accompanying Drawing represents in elevation an eye screw
bolt made according to my invention in combination with a screw nut; Figure 2
represents a cross section of the same taken through the eye on the line a, a and
Figure 3 represents a cross section of the same taken through the bolt stem on the
line b, b; c is the eye of the bolt and d, d the stem, a portion of which is screwed
as usual; e is the screw nut on the screwed part of the bolt. The said eye c and
stem d, d are made by folding or doubling a semi-cylindrical rod at its middle

page_text: upon a cylindrical rod or core, the flat faces of the two parallel branches of the
bent rod being brought into contact as herein before described and if desired some
portions permanently connected. By the bending of the eye part of the bolt
round the cylindrical core the metal at the inside of the eye takes the shape shown
in cross section Figure 2. After the screw nut e has been screwed upon the bolt
stem, the said stem consisting of a cylinder divided by the plane in which the axis
of the cylinder is situated, the said screw nut e can be fixed in position by
expanding or opening out the part of the screw protruding beyond the said
screw nut.
The head of my improved screw bolt may be made of any required shape as
herein before pointed out.
Having now particularly described and ascertained the nature of my inven-
tion and the manner in which the same is to be performed I declare that
I claim;-
Making eye screw bolts or screw bolts having other shaped heads from a rod
semi-cylindrical in cross section, doubled or folded at its middle so as to form two
parallel branches the flat faces of which are in contact. substantially as herein
before described and illustrated in the accompanying Drawing.