Year: 1887

page_text: Date of Application, 8th Dec., 188"
Complete Specification Left, 6th Sept., 1888
Complete Specification Accepted, 12th Oct., 1888
WILLIAM ARMSTRONG, 51, Groombridge Road South Hackney Middlesex, Sugar
refiner do hereby declare the nature of this invention to be as follows:-
It is claimed, that the novelty consists―
-
Firstly that the threaded end of the bolt or a space near thereto, is shaped to a
square or other form having sides of equal dimensions.
Secondly- a cap (or second nut) having centred in it an aperture corresponding in
shape to the above; together with certain attachments-which, when applied to the
cap or adjacent parts secure the first or nut proper in a fixed position.
The afore named attachments may consist-either of a rim descending from the
lower edge of the cap (or second nut) with the inside face corresponding in shape to
that of the nut to be locked and so wholly enclose the same, which is then in a fixed
position-Or, instead of a rim, an ear or flap on one or more sides of the cap,
descending as deep as is the thickness of the nut to which it or they may be secured
by set screws.
Din Caventh day of Janna 1000

page_text: WILLIAM ARMSTRONG 51, Groombridge Road South Hackney Middlesex, Sugar
refiner, 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 :-
The novelty consists in shaping a portion of the bolt so as to receive a cap, which
by certain attachments secures the nut in a fixed position as shown in the figures on
a sheet of drawings illustrating the same.
Figure 1 consists of the bolt A having the end thereof shaped square; also the
nut B and a cap C, which cap is a plate of the requisite thickness having centred in
it an aperture A corresponding to the shaped end of the bolt.
The said plate is the shape of the top side of the nut, but projecting beyond the
surface of the nut on two opposite sides, from each of which descends an ear or flap V
as deep as is the thickness of the nut B.
The shaped end of the bolt A is pierced with a hole so situated that it is imme-
diately above the plate of the cap C when it is fixed on the nut B. In this hole is
inserted a split pin or other form of key G.
Figure 2 provides for the same arrangement of holt nut and cap as figure 1.
excepting that the squared end of the bolt A is not perforated and the attachment is
different.
In centre of each ear (or flap) V is a hole tapped to receive a screw D made
square headed for convenience in removal.
All round the nut B is a groove E to receive the end of the screw D. Or, in
lieu of a groove, a hole may be drilled in the centre of each face of the nut B to serve
the same purpose as the groove.
Figure differs from figure 1. only in the cap C. the plate of which is very
much thicker and on two sides is perforated to the central aperture. When the cap
is on the nut. B. the holes in the sides of the plate of the cap are in line with that
pierced through the shaped end of the bolt A and through which hole, from side
to side of the cap is inserted a split pin G or other form of key; or the holes in the
sides of the cap may be threaded to receive a set screw D like that used as a
fastening in figure 2 in which case, the ends of the screws pass into the hole
pierced through the shaped end of the bolt as described in the third paragraph of the
description of figure 1.
It is to be noted, that whereas in the figures on the sheet of drawings herewith,
the end of the bolt is squared, yet the claim here following provides for varied forms
of shaping thereof; also, that the thickness of all parts of the cap must be deter-
mined by the strain to which it may be subjected.

page_text: Having now fully described the nature of my invention and in what manner it is
to be applied; I declare that my claim is-
1. That the end of the bolt instead of being threaded is shaped to a square or other
form having sides of equal dimensions.
2. A cap (or second nut) having centred in it an aperture corresponding in shape
to the altered form of the end of the bolt-which cap, with certain attachments, when
secured to the first or nut proper, hold it in a fixed position whereby it cannot be
loosened by vibration, oscillation, or other cause except destruction.
3. The fastenings are not claimed as novel except as in combination with either
the cap, the nut or the shaped end of the bolt.
Dated this 6th day of September 1888