those Used on Velocipedes.
Year: 1885

page_text: those Used on Velocipedes.
I JOHN DE LANNOY WATSON, of the Merlin Engineering Works, Brixton in the
County of Surrey, engineer, do hereby declare the nature of this invention to be
as follows:-
In the first place, the screwed hole in the bearing lug is made conical, being
larger on that side which is remote from that side at which the screw enters.
Secondly, I take an ordinary Bearing Screw which I bore right thro' the centre
and make this hole at the screwed end of the screw conical, and also cut up this
end two or three slits to allow of it being expanded.
Thirdly, to expand the end of this Screw when screwed up in its place in the
bearing lug, I put a bolt thro' the hole in the Bearing Screw, which bolt is conical
at one end to fit the conical part of the hole in the Bearing Screw, the other end
being screwed to take a nut, which end projects thro' the head of the Bearing
Screw. Then by screwing up the nut on this bolt I swell out the split end of the
Bearing Screw which locks it perfectly tight in the bearing lug. By this arrange-
iment, which I claim as my invention, I can securely lock the screw in any position
it may be turned.

page_text: those Used on Velocipedes.
I JOHN DE LANNOY WATSON of 17 Josephine Avenue, Brixton Rise, Brixton, in
the County of Surrey, 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 relates to the Locking firstly of those screws used where it is
inconvenient to get a nut for the usual method of locking such screws, and
Becondly to lock a nut in its place without the use of a second nut termed a
locknut.
To effect my locking arrangement I bore a hole right through the screw or
bolt A. Fig. I. and at that end of the Screw or Bolt which is screwed I enlarge the
hole conically see Fig. I, and slit up this screwed end about the length of thread
on screw with four or more or less slits a. see Figs. II & IV to allow of its being
expanded. From this conically enlarged end I put in the pin or bolt B Fig. VII.
having a conical end somewhat larger than the normal size of the conical hole at
the screwed end of Bolt or Screw. The other end of pin B, which is put in the
screw A from the conically enlarged end is screwed and allowed to project far
enough through the other end of screw A (which in the drawing herewith is
recessed to let the nut take up less space) to admit of getting a hold by nut; on
this, end I put a nut C see Figs. I & VI by which I can draw through the pin B
and thus expand the screwed end of Screw or Bolt A.
I then make the nut or tapped hole D see Fig. III. into which the Screw is to be
locked conical, being the same size as the normal diameter of the screw at the end
at which the screw enters and getting greatest in diameter at the opposite size.
After having screwed up the screw or nut in it place I then proceed to lock it
there by means of screwing up the nut C which draws through the pin B,
expanding the screw till it fills up the conically tapped hole and rendering it
impossible for the Screw to work out until the pin B be again released, see Fig. IV.
Having now particularly described and ascertained the nature of my said
Invention, and in what manner the same is to be performed, I declare that what
I claim is :
.
1. The Screw or Bolt having its screwed end slit up to allow of its being
expanded by an internal bolt, having a conical end which can be drawn through
from the head side of screw or bolt by means of a nut or otherwise in order to
expand the slit end of the screw in such a manner that it cannot be undone
without first releasing the internal bolt.