Constructing the same.
Year: 1887

page_text: Date of Application, 18th Aug., 1887
Complete Left, 12th May, 1888
Complete Accepted, 6th July, 1889
Constructing the same.
We, JAMES EGLINTON ANDERSON GWYNNE of Essex Street Works, Victoria
Embankment in the County of Middlesex, Civil Engineer, and JOHN JAMES CLARET
of 10 Wilton Square, New North Road in the County of Middlesex, Engineer do
hereby declare the nature of this invention to be as follows:-
The object of our Invention is the construction of nuts to be made in steel, iron or
other suitable metal, and to he formed with the hole placed out of the centre; we
prefer that the thicker side of the nut should be immediately opposite to the split or
opening in the nut, thereby offering a maximum of elasticity and grip or spring.
We prefer to make the nut in steel as it will be harder, stronger and more elastic,
a prominent part of this invention being the casting of the nut in steel in one operation
including the formation of the screw threads by means of properly constructed dies,
models or moulds.
The elasticity of the nut is sufficient to afford ample grip of the same upon its
screw or bolt, or to withstand shake or vibration, in order however to give additional
gripping or holding power, on the bottom or under-surface of our improved lock-nut,
we form or make a cone or any other suitable projection or projections, depression or
depressions, which on entering or making corresponding recesses or projections in any
washer fish-plate or other piece of iron or other metal or substance, and the like,
against which the nut may be brought into contact; the nut by this expedient is made
to grip any screw or bolt with much greater force, as there is thus a tendency to
diminish the slit or point of division, our improved nut being as already stated split
through on the thin side, the hole being placed eccentrically.

page_text: When screwing our improved nut upon a bolt we take caro to see that the bolt is
not made too large or too taper for the nut (we prefer to make the thread or bolt
parallel, but the nut for the first two or three threads we may make taper or widest at
the entering side, to facilitate the screwing of the nut on the bolt) as if so the nut
might be forced open to such an extent as to exceed the elastic linit, and thereby
prevent the nut from resuming its normal size and shape, when again unscrewed or
released from its bolt.
In some cases we construct our nuts so that the face is not in a plane with or
parallel to the face against which it takes its bearing, in this way the final screwing
up forces some of the threads of the bolt out of place or distorts them, and thus
forms an additional barrier to the unscrewing of the nut.
Dand thin 17th day of Ausnot 1887

page_text: Improvements in Safety Screw or Lock Nuts and in the Mode of
Constructing the same.
We, JAMES ELINTON ANDERSON GWYNNE, of the Essex Street Works Victoria
Embankment, London, W.C., Civil Engineer and JOHN JAMES CLARET of West
Green Road, Tottenham, 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 :—
The object of our Invention is the construction of nuts to be made in steel, iron or
other suitable metal, and to be formed with the hole placed out of the centre. We
prefer that the thicker side of the nut should be immediately opposite to the split or
opening in the nut, thereby offering a maximum of elasticity grip or spring.
We prefer to make the nut in steel as it will be harder, stronger & more elastic
a prominent part of this invention being the casting of the nut in steel in one
operation including the formation of the screw threads by means of dies, models
or moulds, of suitable form.
The elasticity of the nut is sufficient to afford ample grip of the same upon its
screw or bolt, or to withstand any shake or vibration; in order however to give
additional gripping or holding power, on the bottom, or under surface of our improved
lock-nut we form or make a cone or any other suitable projection or projections,
depression or depressions which on entering meeting or making corresponding recesses
or projections in any washer fish-plate, or other piece of iron or other metal, or
substitutes etc. etc., against which the nut may be brought into contact with; the nut
by this expedient is made to grip any screw or bolt with much greater force, as there
is thus a tendency to diminish the slit or point of division, our improved nut being
as already stated split through, on the thin side by preference the hole being placed
eccentrically.
When screwing our improved nut upon a bolt, we take care to see that the bolt is
not made too large or too taper for the nut. We prefer to make the thread on
the bolt parallel, but the nut for the first two or three threads to be taper or
widest at the entering side to facilitate the screwing of the nut on bolt, as if so,
the nut might be forced open to such an extent as to exceed the elastic limit, and
thereby prevent the nut from resuming its normal size and shape when again unscrewed
or released from its bolt.
In some cases we construct our nut so that the face is not in a plane with or parallel
to the face against which it takes its bearing.
In this way the final screwing up forces some of the threads of the bolt out of
place or distorts them, and thus form an additional barrier to the unscrewing of
the nut.
In order that our invention may be more clearly understood we now refer to the
annexed Drawing in which Fig. 1 represents the Invention applied to a six-sided

page_text: or Hexagonal nut, whilst Fig. 2 represents the same applied to a square Nut, & from
both of which it will be seen that the Nut is split or parted by preference on the
thinnest side in order to give spring or elasticity to the same. The Bolts shown in
the several Figures on the Drawings are no part of the invention but are merely
included for the purpose of showing more clearly the advantages to be derived from
the application of our improved Lock nut; Figs. 3 & 4 represent the bottom side of
the nut formed, in the case of Fig. 3, as a projection & in Fig. 4 as a recess, on the
under side of the Nut as previously mentioned & described in our Specification,
whilst in Fig. 5 the bottom side is formed slightly out of parallel with the face
against which it is brought into contact when screwed up, thus causing the nut to
be slightly distorted & an additional or jambing action brought to bear against the
screw thread on the Bolt of which our improved Lock nut is applied.
Having now fully described the nature of our Invention & illustrated the same
by means of the Drawing annexed we now beg to state that what we claim is ;-
1st. The formation of improved Lock nuts in Iron, Steel, Brass, Gunmetal, or,
other metallic or non-corrosive alloys the prominent features of which are the
projections or recesses on the face of the nut, that the hole is placed out of the
centre of the Nut, & that the latter is split through or parted on the thin side
substantially as described.
2nd. The manufacture of our improved Lock nut in iron, steel or other suitable
metals or alloys in one operation including the formation of the screw threads by
means of Dies, Models, or Moulds of suitable form.
3rd. The application of this Invention to the various kinds of nuts used for
Engineering & other mechanical purposes whether shown in the annexed Drawing
or not.
Dated thin 10th dow of M. 1988
JOHN HAYES,
Agent for Applicants.