Year: 1896

page_text: Date of Application, 27th May, 1896
Complete Specification Left. 1st Mar., 1897-Accepted. 10th Apr., 1897
I, WILLIAM WRIGHT of 2 Saltash Street, Plymouth, in the County of Devon,
Brass Finisher, do hereby declare the nature of this invention to be as follows:-
This invention relates to nut locking devices and may be carried out in the
following manner :-
I form in the bolt a groove preferably terminating in a small recess or hole
in the substance of the bolt, and in this groove I insert a rod or pin which may
have the end turned down so as to enter the recess in the groove. The nut upon
one of its faces is provided with one or more recesses or slots preferably upon its
outer face into one of which when the nut is screwed home the end of the pin is
placed by bending it. Thus it is impossible for the nut to unlock until the pin
is removed from the slot.
The slots may if desired have one edge bevelled and the pin may be arranged as
a spring so that while the nut can be turned further in the direction of screwing it
up it cannot be turned in the direction of unscrewing it, excepting by the exercise
of such force as would cut or force the pin out of the slot or by driving it out of
the slot and then turning the nut.
In a modification the pin may be fastened to the washer or its head end may
enter a recess in the washer and operate generally as previously described.
The pin may be formed at its inner end into a ring to encircle the bolt and in
that form is very suitable for use as a spring as above described; in this case the
inner side of the nut or the washer may be recessed or enlarged so as to accommodate
the ring portion of the pin.
Modifications in detail may be made in this invention as for example more than
one groove may be employed and only one pin or more than one pin.
Dated this 27th day of May 1896.
BOULT & WADE,
Agents for the Applicant.
I, WILLIAM WRIGHT of 2 Saltash Street, Plymouth, in the County of Devon,
Brass Finisher, 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 nut locking devices and may be carried out in the
following manner :-
I form in the bolt a groove preferably terminating in a small recess or hole in
the substance of the bolt, and in this groove I insert a locking rod or pin which
may have the end turned down so as to enter the recess in the groove. The nut upon
[Price 8d.1

page_text: one of its faces is provided with one or more recesses or slots preferably upon its
outer face, into one of which, when the nut is screwed home the end of the pin is
placed by bending it. Thus it is impossible for the nut to unlock until the pin
is removed from the slot.
The slots may if desired have one edge bevelled and the pin may be arranged as
a spring so that while the nut can be turned further in the direction of screwing it
up it cannot be turned in the direction of unscrewing it, excepting by the exercise
of such force as would cut or force the pin out of the slot or by driving it out of
the slot and then turning the nut.
In a modification the pin instead of being inserted into the hole at end of the
bolt slot, to prevent its turning, may lie in a radial recess in a "D" washer which
is incapable of rotating on the bolt or stud, and for the rest operates as above
described.
The pin may be formed at its inner end into a ring to encircle the bolt instead
of entering a recess therein; and in that form is very suitable for use as a spring
as above described; in this case the inner side of the nut or the washer may be
recessed or enlarged, so as to accommodate the ring portion of the pin.
Modifications in detail may be made in this invention as for example, more thau
one groove may be employed and only one pin or more than one pin.
In the accompanying drawings:-
Fig. 1 is a longitudinal central section of a stud and nut to which this invention
is applied;
Fig 2 is an end view of the same shewing the ratchet teeth formned on end
of nut;
Fig. 3 shews a locking pin before use;
Fig. 4 represents the nut formed with slots on its end;
Fig. 5 represents in longitudinal section the invention applied to a D washer,
for locking the nut;
Fig. 6 shews the same in a transverse section taken just in front of the D washer.
Like letters represent like parts throughout the drawings.
A is a stud screwed into solid work B; C is a nut and D a washer and E is the
piece required to be held against the part B. In the stud is cut a groove or slot A¹
terminating in a hole or recess A going deeper than the slot into the stud or lying
at an angle to that slot and in such a position, that, when the stud is screwed home.
into the piece B, the groove A' in the bolt shall protrude beyond the face of the
work B. Before the stud is screwed into place, a pin F, such as is shown separately
in Fig. 3, is placed in this groove A', with its hooked end F in the hole A. After
the stud, thus provided with the pin, is screwed into position, the end F2 of the
pin F can be bent over, into a groove 131 previously provided for the purpose in
the solid work B, thus locking the stud in its place. The pin F preferably has
teeth to occupy the position of those parts of the threads on the stud A, which
have been cut away, in forming the slot A'. In the same way the nut C may be
locked on the stud, A being the groove in the outer end of the stud and A the
recess therein. A pin F, such as is herein before described, is put into the
groove A, its end going into the hole A'; and when the nut C is screwed home
the end of the pin is bent over and goes into a slot, provided for the purpose, in
the nut C. In one example illustrated, the nut C (see Figs. 1 and 2) has a number
of ratchet teeth C with one edge of each bevelled, so that the nut can be
tightened after the end of the pin has been bent into them, the end F of the pin
acting as a pawl; but the nut cannot be loosened without the end of the pin being
first bent up.
The inner edges of the grooves in the nut face should be rounded
off as shown at C to prevent the pin being cut. Several forms of ratchet teeth
may be adopted, those in Fig. 1 for instance being formed beyond normal end of
nut and those in Fig. 2 let into the nut end.
If desired, the hole A2 or A¹ in the stud or bolt and the hooked inner end F' of
the pin F may be dispensed with. Or the end F may be made annular, to enter
an annular groove, formed on the exterior of the bolt.

page_text: As an alternative, the pin F could be received and retained in a slotted portion
of the nut instead of in the bolt, and afterwards bent over to engage with the
latter, which if desired could be shaped to receive it.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. The combination of a bolt or stud and nut one or other slotted as at A³ and a
pin such as F in the slot of one adapted to be bent into engagement with the other
substantially as and for the purpose described.
2. In a locking device for nuts bolts or studs the use of a pin such as Flying in
the slotted member and engaging with the other member substantially as and for
the purpose described.
3. The combination with a slotted bolt or stud of a nut with ratchet teeth such
as C C (or vice versa) and a pin such as F in the slot, adapted to serve as a pawl
substantially as described.
4. The locking device for a nut or for a stud or bolt substantially as and for the
purpose described and illustrated in the accompanying drawings.
Dated 18 27th day of February
W. WRIGHT.
Boult & Wade,
Agents for the Applicant.
W. WRIGHT.
Boult & Wade,
Agents for the Applicant.