Improvements in and relating to Nutlock Appliances.
Year: 1893

page_text: Date of Application, 8th Dec., 1893
Complete Specification Left, 1st Sept., 1894-Accepted, 6th Oct., 1894
PROVISIONAL SPECIFICATION.
Improvements in and relating to Nutlock Appliances.
I, WILLIAM DOWNING, St. Philips Road, in the City of Sheffield, Engineer,
do hereby declare the nature of my invention to be as follows:-
:-
This invention relates to improvements in appliances for locking the nuts of bolts,
and of other like screws, and consists, broadly speaking, of a recessed washer and
cap fitting upon the nut."
In carrying out the invention, I make a washer of larger diameter than the nut,
and of considerable thickness, and when applied to a hexagonal nut, it is made
with a shallow hexagonal recess to receive the base of the nut, thus for example
for an inch bolt the recess may be made quarter of an inch deep or thereabouts.
I prefer to place the nut in the said recess before it is screwthreaded, and pass
the tap through both the nut and the washer at the same time forming the thread
in the washer continuously with that in the nut.
The cap is made with a recess similar to that in the washer, but instead of a
round hole in the centre, it is made with a smaller hexagonal hole to receive the end
of the bolt or screw which is correspondingly shaped to fit easily into it.
This centre hole may however be of square or other suitable shape, the end of
the bolt being made to correspond. I prefer to allow the end of the bolt to
project through the cap a sufficient distance so that a hole may be made through it
to receive a split pin or the like for the purpose of securing the cap, but in many
positions this is not necessary.
The washer and cap may be made of any suitable metal, and either cast or
wrought to form.
When the bolt is in position the washer and nut are screwed down together as
tight as required, then the cap is placed upon the nut and the pin passed through
the pinhole.
Dated the 5th day of December 1893
ROBT. F. DRURY, C.P.A.,
Bank Buildings, George Street, Sheffield, Agent for Applicaut.
COMPLETE SPECIFICATION.
Improvements in and relating to Nutlock Appliances.
I, WILLIAM DOWNING St. Philips Road, in the City of Sheffield, Engineer,
do hereby declare the nature of this invention and in what manuer the same is to
be performed, to be particularly described and ascertained in and by the following
statement :-
This invention relates to improvements in appliances for locking the nuts of bolts,
and of other like screws, and consists, broadly speaking, of the use of a recessed
washer aud cap, both fitting upon the nut.
The invention is illustrated in the annexed sheet of drawings-
Fig. 1, being a section of two plates bolted together, with the nut, cap, and
washer also shown in section.
IN
د
1
1

page_text: In carrying out the invention, I make a washer W, of larger diameter than the
nut N, which may be hexagon as shown or of other form, and of considerable
thickness, and when applied to a.hexagonal nut as shown it is made with a shallow
hexagonal recess R', to receive the base of the nut N; thus for example for an
inch bolt the recess R', may be made quarter of an inch deep or thereabouts.
I prefer to place the nut in the said recess before it is screwthreaded, and pass
the tap through both the nut N and the washer W, at the same time, thus forming
the thread in the washer continuously with that in the nut.
The cap C, is made with a recess K³, similar to that in the washer W, but instead
of a round hole H', in the centre, it is made with a smaller hexagonal hole H³, to
receive the end of the bolt B, or screw which is correspondingly shaped to fit easily
into it.
This centre hole may however be of square or other suitable shape, the end of
the bolt being made to correspond. I prefer to make the end E, of the bolt B, to
project through the cap C, a sufficient distance in order that a hole may be made
through it to receive a split pin P, or the like, for the purpose of securing the cap,
but in many positions this is not necessary.
The washer and cap may be made of any suitable metal and either cast or
wrought to the required form.
When the bolt B, is in position the washer and nut are screwed down together as
tight as required, then the cap is placed upon the nut and the pin passed through
the pin-hole.
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. The means for locking the nut of a bolt or other screw, substantially as
herein before described, and as illustrated.
2. As a means for locking nuts, a washer W, having a recess for the lower
part of the nut to fit into, in combination with a recessed cap C, to fit over the
top of the nut, as hereinbefore described and shown.
3. As a means for locking nuts, the combination a bolt or screw of a nut N,
a recessed washer W, a recessed cap C, and a pin P, or its equivalent acting
together for the purpose specified and substantially as hereinbefore described
with reference to the drawings.
Dated the 30th day of August 1894.
ROBT. F. DRURY, C.P.A.,
Bank Buildings, George Street, Sheffield, Agent for Applicant.