IMPROVEMENTS IN SCREW BOLTS AND IN THE MEANS FOR SECURING THE NUTS THEREON
Year: 1868

page_text: LETTERS PATENT to Thomas Vaughan and Emile Watteen, both of
Vulcan Works, Middlesborough-on-Tees, in the County of York,
for the Invention of "IMPROVEMENTS IN SCREW BOLTS AND IN THE MEANS
FOR SECURING THE NUTS THEREON."
Sealed the 7th May 1869, and dated the 11th November 1868.
PROVISIONAL SPECIFICATION left by the said Thomas Vaughan and
Emile Watteeu at the Office of the Commissioners of Patents, with
their Petition, on the 11th November 1868.
We, THOMAS VAUGHAN and EMILE WATTEEU, both of Vulcan
Works, Middlesborough-on-Tees, in the County of York, do hereby
declare the nature of the said Invention for "IMPROVEMENTS IN SCREW
BOLTS AND IN THE MEANS FOR SECURING THE NUTS THEREON," to be as
follows:-
Our Invention has for its object an improved construction of screw
bolts, more particularly applicable as fish bolts, whereby the nuts are
prevented from becoming unscrewed
unscrewed or slackened therefrom, and
whereby the bolts are considerably lightened.
"

page_text: For this purpose we form the front or screwed end of the bolt hollow
or with a recess passing some distance down the centre of the bolt,
and when the nut is screwed up to the required degree of tightness we
force a steel conical plug or mandril into the opening of the recess so
as to widen out that part of the bolt projecting beyond the nut, which
is thus prevented from unscrewing; the steel mandril is then removed,
and employed in the same manner for other bolts.
This Invention is equally applicable to all constructions of screw
bolts, whether with a head at one end and a nut at the other of any
desired shape, or whether with both ends screwed to receive nuts.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Thomas Vaughan and Emile Watteeu in the
Great Seal Patent Office on the 11th May 1869.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, THOMAS
VAUGHAN and EMILE WATTEEU, both of Vulcan Works, Middlesborough-
on-Tees, in the County of York, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Eleventh day of November, in the year
of our Lord One thousand eight hundred and sixty-eight, in the thirty-
second year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto us, the said Thomas Vaughan and Emile Watteen'
Her special licence that we, the said Thomas Vaughan and Emile
Watteeu, our executors, administrators, and assigns, or such others as
we, the said Thomas Vaughan and Emile Watteeu, our executors,
administrators, and assigns, should at any time agree with, and no
others, from time to time and at all times thereafter during the term
therein expressed, should and lawfully might make, use, exercise, and
vend, within the United Kingdom of Great Britain and Ireland, the
Channel Islands, and Isle of Man, an Invention for "IMPROVEMENTS
IN SCREW BOLTS AND IN THE MEANS FOR SECURING THE NUTS THEREON," upon
the condition (amongst others) that we, the said Thomas Vaughan
and Emile Watteeu, our executors or administrators, by an instrument
in writing under our or their hands and seals, or under the hand and
seal of one of us or them, should particularly describe and ascertain the

page_text: nature of the said Invention, and in what manner the same was to
be performed, and cause the same to be filed in the Great Seal Patent
Office within six calendar months next and immediately after the date of
the said Letters Patent.
NOW KNOW YE, that we, the said Thomas Vaughan and Emile
Watteeu, 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 thereof, reference being
had to the accompanying Sheet of Drawings and to the figures and
letters marked thereon, that is to say:-
Our Invention has for its object an improved construction of screw
bolts, more particularly applicable as fish bolts, whereby the nuts are
prevented from becoming unscrewed or slackened therefrom, and
whereby the bolts are considerably lightened.
For this purpose we form the front or screwed end of the bolt hollow
or with a recess passing some distance down the centre of the bolt, and
when the nut is screwed up to the required degree of tightness we force
a steel conical plug or mandril into the opening of the recess so as to
widen out that part of the bolt projecting beyond the nut, which is thus
prevented from unscrewing. The steel mandril is then removed and
employed in the same manner for other bolts.
This Invention is equally applicable to all constructions of screw bolts,
whether with a head at one end and a nut at the other of any desired
shape, or whether with both ends screwed to receive nuts.
Figures 1 to 4 on the accompanying Sheet of Drawings shew the
construction of and mode of using a screw bolt according to our
Invention.
Figure 1 shews a longitudinal section, and Figure 2 shews an end view
of a bolt A, the screwed end of which is formed hollow or with a
recess a passing some distance down it. After the nut B has been
screwed up to the requisite tightness the steel plug or mandril C,
Figure 4, is driven into the recess a so as to widen out the part of
the bolt projecting beyond the nut, as indicated at Figure. 3, whereby
the nut is effectually prevented from becoming unscrewed.
Having thus described the nature of our Invention, and in what
manner the same is to be performed, we wish it to be understood

page_text: that what we claim under the herein-before in part recited Letters
Patent is,―
First. Constructing screw bolts with the screwed end formed hollow
or recessed, substantially as and for the purposes set forth.
Second. Securing the nuts on such bolts by driving a conical plug or
mandril into the recess in the bolt so as to expand the same, substantially
as described.
In witness whereof, we, the said Thomas Vaughan and Emile
Watteeu, have hereunto set our hands and seals, this Seventh
day of May, in the year of our Lord One thousand eight
hundred and sixty-nine.
THOMAS VAUGHAN. (L.S.)
EMILE WATTEEU.
(L.S.)