AN IMPROVED NUT LOCKING DEVICE
Year: 1883

page_text: LETTERS PATENT to William John Brewer, of 23 Rood Lane, in the City of
London, Civil Engineer for an Invention of "AN IMPROVED NUT LOCKING
DEVICE
"
PROVISIONAL SPECIFICATION left by the said William John Brewer at
the Office of the Commissioners of Patents on the 21st March 1883.
WILLIAM JOHN BREWER, of 23 Rood Lane, in the City of London, Civil
Engineer, "AN IMPROVED NUT-LOCKING DEVICE
"
My invention relates to a novel appliance for the locking of nuts securing bolts,
in a simple, speedy, and efficacious manner where the nuts are in positions whero
they are subject to jar tending to loosen them, such as on railway fish plate bolts.
My device is constructed of a thin plate of tough, but pliable, material, such as
wrought iron. This thin plate is pierced with holes to fit freely over the ends of
the bolts, and thus forms a species of washer. The plate has slits cut from the
upper and lower edges to points close to the nut, thus forming tongues which may
be easily prized over and lapped upon the nuts when screwed home.
Where there
is more than one nut, as in a fish plate, this plate is continuous from one bolt to
the other, and thus affords the necessary resistance to rotation to lock the nut.
Where it is employed in relation to a single nut such resistance may be obtained by
the use of a stud, or where applied to a fish plate, by bending the plate under the
lower head of the rail

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said William John Brewer in the Great Seal Patent Office on the
21st September 1883.
WILLIAM JOHN BREWER, of 23 Rood Lane, in the City of London, Civil
Engineer
"AN IMPROVED NUT LOCKING DEVICE
"
My invention relates to a novel appliance for the locking of nuts which secure
bolts, in a simple, speedy, and efficacious manner, where the nuts are in positions
where they are subject to jar, tending to loosen them, such as on railway fish-plate
bolts.
In order that my invention may be the better understood I now proceed to
describe the same with reference to the drawings hereunto annexed, in which like
letters refer to like parts throughout the figures. The different figures show various
alternative forms of my device, which is constructed of a thin plate of tough but
pliable material, such as wrought iron. This thin plate A is pierced with holes B
to fit freely over the ends of the bolts, and thus forms a species of Washer, into
close contact with which the nuts C are screwed. The plate has slits D., Figs
1 and 2, cut from the edges, or in the plate as at G, to points close to the nut, thus
forming tongues which may be easily prized over and lapped upon the nuts when
screwed home, as is shown partially done in the figures. In place of slitting the
plate, I alternatively attain my object by stamping the end or ends of the plate in an
approximately circular form, as shown in Figs 3 and 4. In this case the tongues
are the arcs of a circle, which project beyond the nut, one of which is shown lapped
upon the nut in Figs 3 and 4. Where there is more than one nut, as in a fish plate,
my device is continuous from one nut to the other, as shown in Fig 1, or between
pairs of nuts as shown in Fig. 3, and thus affords the necessary resistance to
rotation to lock the nut. Where it is employed in relation to a single nut, such
resistance may be obtained by the use of a stud, E, Fig 2, or, when applied to a
fish plate for instance, by bending the plate under the lower head of the rail, as at F,
Fig 4.
I have shown the plate with a neck, and I find that this construction not only
saves material, but allows of a greater lapping surface at its ends; but I may have
it of the same width throughout.
Having now fully described and ascertained the nature and objects of my
invention, be it known that what I. claim and desire to protect by my letters
patent is
The construction of a nut locking device consisting of a plate with lapping
tongues together with formation or appliances for the resistance to rotation,
substantially as and for the purposes set forth.
In witness whereof I the said William John Brewer have hereunto set my hand
and seal this Nineteenth day of September in the year of Our Lord One thousand
eight hundred and eighty three.
Witness:-
S. P. WILDING
23 Rood Lane, London. E.C.
Patent Agent.
WILLIAM JOHN BREWER. (L.S.)