Improvements in Nut Locking Devices.
Year: 1891

page_text: Date of Application, 11th Nov., 1891
Complete Specification Left, 11th Aug., 1892-Accepted, 17th Sept., 1892
PROVISIONAL SPECIFICATION.
Improvements in Nut Locking Devices.
I, WALTER GRIMES of St. Margarets, Twickenham, in the County of
Middlesex, Commercial Traveller, do hereby declare the nature of this invention
to be as follows:-
This invention relates to devices for locking nuts on their bolts and is especially
applicable to the fish plates used on railways.
In carrying out the invention I form in the fish plate one or more longitudinal
grooves and between the nut and the fish or other plate which is to be secured 1
place a washer having a rib extending centrally across it and adapted to fit into a
corresponding groove in the face of the nut. In use the nut is screwed down upon
the washer so that the rib of the washer enters the groove of the nut after which
the washer revolves with the nut as the latter is screwed up. When the nut has
been screwed home one or more portions of the washer are driven or swaged into
one of the grooves in the fish or other plate by a drift or other suitable tool so that
as the nut cannot turn without the washer and the washer cannot lift off the plate
until the nut has turned the nut is positively fastened or locked. The groove or
grooves in the fish plate are preferably formed with one opposing and one retreating
edge so that to turn the washer in the direction necessary to undo the nut the
depressed portion of the washer would engage with the opposing or positive edge
of the groove in the plate. To release the washer the portion forced into the
groove may be forced out again by a chisel from the edge or that portion of the
washer may be cut out; the nut can then be removed and both the nut and bolt are
ready for use again. The washer may or may not be suitable for re-use.
Instead of long grooves in the plate short grooves or recesses may be employed
but the grooves are generally preferred.
In a modified form the nut and washer are made in one the washer forming a
flange projecting from the nut; otherwise the operation is the same.
Dated this 11th day of November 1891.
W. P. THOMPSON & BOULT,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Nut Locking Devices.
1, WALTER GRIMES, of St. Margarets, Twickenham, in the County of
Middlesex, Commercial Traveller, 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 devices for locking nuts on their bolts and is especially
applicable to the fish plates used on railways.
In carrying ont the invention I form in the fish plate one or more longitudinal
grooves and between the nut and the fish or other plate which is to be secured
place a washer having a rib extending centrally across it and adapted to fit into
a corresponding groove in the face of the nut. In use the nut is screwed down
upon the washer so that the rib of the washer enters the groove of the nut after
which the washer revolves with the nut as the latter is screwed up. When the nut
has been screwed home one or more portions of the washer are driven or swaged
into one of the grooves in the fish or other plate by a drift or other suitable tool so
that as the nut cannot turn without the washer and the washer cannot lift off the
[Price]

page_text: plate until the nut has turned, the nut is positively fastened or locked. The groove
or grooves in the fish plate are preferably formed with one oppusing and one
retreating edge so that to turn the washer in the direction necessary to undo the
nut the depressed portion of the washer would engage with the opposing or positive
edge of the groove in the plate. To release the washer the portion forced into the
groove may be forced out again by a chisel from the edge or that portion of the
washer may be cut out; the nut can then be removed and both the nut and bolt are
ready for use again. The washer may or may not be suitable for re-use.
Instead of long grooves in the plate short grooves or recesses may be employed
but the grooves are generally preferred.
In a modified form the nut and washer are made in one the washer forming a
flange projecting from the nut; otherwise the operation is the same.
In the accompanying drawings
Figure 1 represents a section of a rail fish plate and bolt complete, the bolt
being shown in full, and the washer without the portion driven into the groove.
Figure 2 is a similar view taken in front of the bolt and showing a portion of the
washer driven into the groove in the fish plate.
Figure 3 is an elevation of a portion of a fish plate with the bolts, nuts and
washers in position.
Figure 4 is a side view of a nut and washer constructed according to this inven-
tion, and
Figure 5 shows the application of this nut locking device to a portion of a wooden
beam.
Like letters represent like parts throughout the drawings.
A is the bolt of any suitable size and design screwed to take the nut B which as
shown in Figure 4 has a groove B' across its face. The washer C has a rib C¹
extending across it excepting where interrupted by the hole in the washer and
corresponds with the groove B' of the nut B so that when the two are placed
together upon the bolt A the washer will turn with the nut B and the nut cannot
turn without the washer. The plate or surface against which the washer is forced
by the screwing up of the nut B is provided with a suitable groove, recess, channel,
or the like, which extends under at least a portion of the nut; this groove D as
shown in Figure 3 is a longitudinal groove extending throughout the face of the
fish plate but so long as sufficient recess is provided into which a portion of the
washer can be driven it is immaterial whether the groove or recess be long or short.
As shown in the drawings the groove is preferably made with one square face D₁
the other edge shelving off to the level of the plate. Into this groove a portion C³
of the washer is driven by any suitable means as by a caulking tool, chisel, or
the like, so that if the nut should endeavour to unscrew or become loose, the
washer being fast to the nut and held by its portion C2 in the groove D, would
counteract such a tendency, whereas if it was necessary to screw the nut tighter up
this could be done as the washer would either spring over the inclined face of
the groove D, or the portion bent down would be pressed up more or less into
the line of the rest of the washer. So long as a firm hold is secured upon the
edge of the groove it is iminaterial whether a large or small portion of the
washer C be pressed into it, just a corner as indicated in Figure 3 would generally
be sufficient.
In Figure 5 the arrangement is substantially the same as that already described,
the groove or recess D being formed in a plate E secured upon a wooden beam F
by screwing or otherwise in order to afford the necessary hold to the washer. A
plate or washer G also is in this instance shown between the head A' of the bolt A
and the beam F to prevent the head from being drawn into the wood.
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. In a nut locking device the combination of a grooved nut such as B B¹ ribbed

page_text: washer such as C C¹ and groove or recess such as D D' in the plate or face against
which the washer is to be screwed substantially as described and illustrated in the
accompanying drawings.
2. In a nut locking device for use on fish plates the combination with a fish plate
having a groove or recess such as D D' of a washer and nut such as C C' B B'
and a tongue such as (2 pressed out of the washer substantially as described and
illustrated in the accompanying drawings.
3. In a nut locking device the combination with a combined nut and washer or
flanged nut of a groove or recess such as D D' in the plate or surface against
which the nut is to be screwed and tongue C pressed out of the washer or
flange into the groove substantially as described and illustrated in the accom-
panying drawings.
4. In a nut locking device the combination with a groove or recess such as D D1.
formed in the plate or surface against which the nut or washer is to be screwed
of a tongue such as C² pressed out of the washer or nut flange after the nut has
been screwed home substantially as described and illustrated in the accompanying
drawings.
5. The combination and arrangements of parts constituting the complete nut
locking device substantially as described and illustrated in the accompanying
drawings.
1000
LUVA
WALTER GRIMES.
W. P. Thompson & Boult,
Agents for the Applicant.
WALTER GRIMES.
W. P. Thompson & Boult,
Agents for the Applicant.