Improved Means for use in Locking together a Nut or Part formed with an Internal Screw-thread and a Bolt or part formed with an External Screw-thread.
Year: 1897

page_text: Date of Application, 9th Feb., 1897
Complete Specification Left, 9th Nov., 1897-Accepted, 11th Dec., 1897
PROVISIONAL SPECIFICATION,
Improved Means for use in Locking together a Nut or Part formed
with an Internal Screw-thread and a Bolt or part formed with
an External Screw-thread.
I, HUBERT ROBERT THOMAS, B.Sc. of Portway Works, Wednesbury in the County
of Stafford, engineer, do hereby declare the nature of this invention to be follows:-
This invention has for its object improved means whereby a nut or part formed
with an internal screw-thread may be interlocked in a positive manner (that is to say,
in a manner which is independent of any frictional hold or bite) with a bolt or part
forined with an external screw-thread, in any one of a number of positions, which are
sufficiently near to one another to provide for great nicety of adjustment, into which
one of the parts may have been moved along or within the other.
The above object is accomplished, according to this invention, by forming a hole
transversely through the bolt, or part which is formed with an external screw-thread,
to receive a split pin or equivalent device, and forming slotted holes through the
sides of the nut, or part which is formed with an internal screw-thread, the slotted.
holes running lengthways in a direction parallel with the axis about which the screw-
thread is formed. It is preferred to form several slotted holes, at equal distances
apart, through the sides or wall of the part which is formed with the internal screw-
thread, and in the case of a square, hexagonal, or octagonal nut, to form a slotted hole
through each side or flat. It will be found convenient in practice, especially in the
case of a nut, to cut the slotted holes in from the outer face of the part which is
formed with an internal thread.
When the parts which are formed, respectively, with an internal and an external
screw-thread have been adjusted in any desired position in relation to one another
which will cause the hole through the one part to be in coincidence with two of the
slotted holes formed through opposite sides of the other part, the two parts are
positively interlocked by means of a split pin or equivalent device which is passed for
the purpose through the two slotted holes of the part which is formed with an
internal screw-thread and through the hole of the part which is formed with an
external screw thread.
In cases in which a considerable range of adjustment is required between the two
screwed parts, two or more holes inay be formed through the part which is formed with an
external screw-thread, at such distance apart that before one of such holes ceases to be
adapted by its position to take its part in locking the two screwed parts together the
hole or one of the holes adjacent thereto is suitably situated for the purpose.
The invention has obviously a very wide application. To give an example, a single
nut may be used at the outer end of a Collinge's axle, in lieu of the two nuts hereto-
fore employed screwed the one with a right and the other with a left hand thread ;
whereby considerable expense in manufacture is avoided, the axle is reduced in actual
length without reducing its effective length, and the operations incidental to the
removal and replacement of a wheel are rendered much simpler than heretofore so
that the risk of mischief resulting from such being performed by unskilled persons,
as is frequently the case, is greatly reduced.

page_text: According to a modification of the invention, a slotted hole may be formed through
the bolt or part which is formed with an external screw-thread, in which case plain
round holes, in lieu of slotted holes, may be formed through the sides of the nut, or
part which is formed with an internal screw-thread.
Improved Means for use in Locking together a Nut or Part formed
with an Internal Screw-thread and a Bolt or Part formed with
an External Screw-thread.
I HUBERT ROBERT THOMAS, B,Sc:, of Portway Works, Wednesbury in the County
of Stafford, 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 has for its object improved means whereby a nut or part formed with
an internal screw-thread may be interlocked in a positive manner (that is to say, in a
manner which is independent of any frictional hold or bite) with a bolt or part formed
with an external screw-thread, in any one of a number of positions, which are
sufficiently near to one another to provide for great nicety of adjustment, into which
one of the parts may have been moved along or within the other.
The above object is accomplished, according to this invention, by forming a hole
transversely through the bolt, or part which is formed with an external screw-thread,
to receive a split pin or equivalent device, and forming slotted holes through the
sides of the nut, or part which is formed with an internal screw-thread, the slotted
holes running in a direction lengthways of, and preferably parallel with, the axis
about which the screw-thread is formed. It is preferred to form several slotted holes,
at equal distances apart, through the sides or wall of the part which is formed with
the internal screw-thread, and in the case of a square, hexagonal, or octagonal, nut,
to form a slotted hole through each side or flat. It will be found convenient in
practice (especially in the case of a nut) to form the slotted holes in from the outer
face of the part which is formed with an internal screw-thread.
When the parts which are formed, respectively, with an internal and an external
screw-thread, have been adjusted in any desired position in relation to one another
which will cause the hole through the one part to be in coincidence with two of the
slotted holes formed through opposite sides of the other part, the two parts are
positively interlocked by means of a split-pin or equivalent device which is passed for
the purpose through the said two slotted holes of the part which is formed with an
internal screw-thread and through the hole of the part which is formed with an
external screw thread.
. According to a modification of the invention, a slotted hole may be formed through
the bolt or part which is formed with an external screw-thread, in which case plain
round holes, in lieu of slotted holes, may be formed through the sides of the nut, or
part which is formed with an internal screw-thread.
The invention has obviously a very wide application. One example thereof is given
by figures 1 and 2, which are, respectively, an outer end elevation, and a plan of the
outer end of a Collinge's axle, to which the invention is applied. In lieu of the two
nuts heretofore employed, screwed the one with a right and the other with a left hand
thread, a single nut. A. is used and has the usual cone a formed at its inner face.
A

page_text: slot b is formed through each of the six sides of the nut, for a considerable distance
from the outer towards the inner end of the nut, and the nut is made of additional
depth to allow for the weakening effect of the slots. A plain round hole c, of a
dianeter equal to the width of each slot, is drilled transversely through the screwed
portion B of the axle, and when any pair of the opposite slots are in coincidence
with the round hole through the part B of the axle, the nut may be securely locked
from turning by passing a split-pin C through the two slots and through the hole
through the part B of the axle. It will thus be seen, that the nut may be locked
upon the axle in any one of six positions, which are an equal distance apart around
the circumference of the part B, for each revolution of the nut, and that the slots
allow the nut to be locked. in this manner in any position along a length of the
portion B of the axle which depends on the length of the slots. The manufacture of
a Collinge's axle is thus simplified, the axle is reduced in actual length without
reducing its effective length, and the operations incidental to the removal and
replacement of a wheel are rendered much simpler than heretofore so that the risk of
mischief resulting from such being performed by unskilled persons, as is frequently
the case, is greatly reduced.
In cases in which a considerable range of adjustment is required between the two
screwed parts, two or more holes may be formed through the part which is formed
with an external screw-thread, at such distance apart that, before one of such holes
ceases to be adapted by its position to take its part in locking the two screwed parts
together, the hole, or one of the holes, adjacent thereto is suitably situated for the
purpose. Such an arrangement is shewn by figure 3, in which Al is a nut screwed
upon a bolt B'. Three holes c, c¹, c², are shewn as formed through the bolt, and in
such position in relation to one another that when the nut A¹ has just been screwed
so far back upon the bolt that a split-pin cannot be passed through two of the
opposite slots 61 of the nut and through the hole c, the nut is in such relation to the
hole c¹ that a split-pin can be passed through such hole only when two of the opposite
slots 6 of the nut are in coincidence therewith, and that when the nut has been
further screwed back upon the bolt just so far that a split-pin cannot be passed
through two of the opposite slots of the nut and through the hole c¹, such can be
passed through the hole c² only when two of the opposite slots b¹ of the nut are in
coincidence with such hole.
Figure 4 illustrates the modification of the invention in which plain round holes
are formed through the sides of the internally screwed portion, and a slotted hole is
formed through the externally screwed portion. The nut A2, which is shewn as
screwed upon the bolt B2, has plain round holes 62 drilled through its sides, and the.
bolt B2 has a slotted hole (shewn by broken lines only) d therethrough.
It is not essential to form holes through opposite sides of the nut or internally
screwed part, or to form a hole clear through the bolt or externally screwed part, as
if proper provision exists for preventing a peg or the like from falling out, the nut or
internally screwed part may be locked upon the bolt or externally screwed part by a
peg or the like which passes through a hole of the nut or internally screwed part and
enters within a hole formed in the bolt or externally screwed part, one of such holes
being slotted. If in the case of parts which are always the same way up when locked
together the peg or the like is situated at the upper side, it will be prevented by
gravity from falling out; but where necessary the peg or the like may be screwed
into place or otherwise securely held therein.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
1. Means for use in locking together a nut or internally screwed part and a bolt
or externally screwed part, which comprise, a hole formed through the side of the
nut or internally screwed part and a hole formed in the bolt or externally screwed
part, either the hole of the nut or internally screwed part or the hole of the bolt or
externally screwed part being slotted in a direction lengthways of, and preferably

page_text: parallel with, the axis about which the screw is formed, and a peg or the like which
is passed through the hole of the nut or internally screwed part and enters the hole
of the bolt or externally screwed part, substantially as described.
2. Means for use in locking together a nut or internally screwed part and a bolt or
externally screwed part, which comprise, holes formed through opposite sides of the
nut or internally screwed part, and a hole formed through the bolt or externally
screwed part, either the holes of the nut or internally screwed part or the hole of the
bolt or externally screwed part being slotted in a direction lengthways of, and prefer-
ably parallel with, the axis about which the screw is formed, and a split-pin or
equivalent device which is passed through opposite holes of the nut or internally
screwed part and through the hole of the bolt or externally screwed part, substantially
as described.
3. Means, of the character above described, for use in locking a nut or internally
screwed part upon a bolt or externally screwed part, which comprise a slotted hole or
holes forined in through the thickness of a side, or through the thickness of two or
more sides, from an end face of the nut or internally screwed part, substantially as
described for the purpose set forth.
4. Means for use in locking a nut (or internally screwed part) upon a bolt (or
externally screwed part), which comprise, a hole (or holes) through the side (or
through opposite sides) of the nut, which is slotted depthways thereof, and preferably
parallel with the axis about which the screw-thread is formed, holes formed in (or
through) the bolt, and a peg or the like which is passed through the side (or through
opposite sides) of the nut and into (or through) one of the holes of the bolt, the said
holes through the bolt being formed in such position in relation to one another that
one or other of them will always be in position in relation to the nut which adapts it
for use in locking the nut when the hole (or two opposite holes) of the nut is in line
therewith, substantially as described.
1
ALL
Nawambon 1807