Improvements in Bolts and Nuts and like Securing Devices.
Year: 1892

page_text: Date of Application, 27th May, 1892
Complete Specification Left, 27th Feb., 1893-Accepted, 1st Apr., 1893
PROVISIONAL SPECIFICATION.
Improvements in Bolts and Nuts and like Securing Devices.
We EDWARD WALL Engineer and GEORGE HENRY FRECKNALL Leather
Merchant both of Guildhall Road Northampton in the County of Northampton
do hereby declare the nature of this invention to be as follows:-
The object of our invention is to prevent the nuts passed over the threaded ends
of bolts and the like from slipping back from the desired position after having been
screwed home and in order to effect this we cut a chase or groove in two or more
positions in the face of the bolt and from the lower portion or foot thereof
extending upwardly to the end of the thread or thereabouts.
In each face of the nut or in a less number (say four of an octagonal nut) we
bore or form a small hole extending from the outer face right through to the inner
and preferably in the centre of the side or face and in a direction at right angles.
to such face.
We provide also for each bolt and nut one or more split or bifurcated pins which
may be made of metal bent to a shape resembling a clothes peg and having the end
of each leg of the fork splayed outwardly.
When the nut has been screwed up a split pin is inserted into one of the holes.
which is brought opposite to one of the grooves in the bolt, the split pin is then
driven up and the forked ends will diverge upwardly and downwardly along the
groove until the head is flush with the face of the nut and so form a key retaining
the said nut in position until withdrawn.
Any suitable number of grooves holes and pins may be employed.
POPPLEWELL & Co.,
Agents for the Applicants.
COMPLETE SPECIFICATION.
Improvements in Bolts and Nuts and like Securing Devices.
We EDWARD WALL Engineer and GEORGE HENRY FRECKNALL Leather
Merchant both of Guildhall Road Northampton in the County of Northampton
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, in which we shall refer to the accompanying sheet of drawings
whereon
Figure 1 is an elevation of a bolt and nut manufactured according to our
invention suitable for a "fish bolt."
Figure 2 is vertical section of same shewing the pin (hereafter described).
inserted and driven home.
Figure 3 is a plan and horizontal section through bolt and nut and
Figure 4 is a detail view of a suitable split or forked pin hereafter described.
The object of our invention is to prevent the nuts passed over the threaded ends
of bolts and the like from slipping back from the desired position after having
been screwed home and in order to effect this we cut a chase or groove A in the
face of a bolt B or more than one if necessary and from the end or foot thereof C
extending upwardly to the end of the thread or thereabouts D.
In each face of the nut E or in a less number we bore or form a small hole F
extending from the outer face right through to the inner and preferably in the
centre of the side or face and in a direction at right angles to such face.
TD 021

page_text: We provide also for each bolt and nut one or more split or bifurcated pins H
which may be made of metal bent to a shape resembling a clothes peg and having
the end of each leg of the fork splayed outwardly.
When the nut has been screwed up a split pin is inserted into one of the holes
which is brought opposite or nearly so to one of the grooves in the bolt, the split
pin is then driven up and the forked ends will diverge upwardly and downwardly
along the groove until the head is flush with the face of the nut and so form a key
.retaining the said nut in position until withdrawn.
Any suitable number of grooves holes and pins may be employed.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is
1. In bolts and nuts or like securing devices longitudinally grooving or chasing
a portion of the entering or threaded end of the bolt, drilling or forming a hole or
holes in one or more of the faces of the nut at right angles thereto and inserting
therein a split or bifurcated pin or equivalent device so formed that on being
driven home the feet will separate in opposite directions substantially as herein-
before described and as illustrated by the accompanying drawings.
2. The improvements in bolts and nuts substantially as hereinbefore described
and as illustrated by the accompanying sheet of drawings.
Dated this 27th day of February 1893.
POPPLEWELL & Co.,
17 & 18, Southampton Buildings, London, W.C.,
Agents for the Applicants.