Securing Nuts to Screwed Bolts.
Year: 1890

page_text: Date of Application, 12th Aug., 1890
Complete Specification Left. 7th May, 1891-Accepted, 13th June, 1891
PROVISIONAL SPECIFICATION.
Securing Nuts to Screwed Bolts.
I, WALTER HARRINGTON, Foley Park, Kidderminster, Bookkeeper, do hereby
declare the nature of this invention to be as follows:-
The combination of a spring and threaded washer, effected by forming one or
more corrugations radiating to the centre, or otherwise, on a washer made of iron,
steel, or other suitable material whose inner circumference is partly bevelled to form.
one or more threads fitting the bolt. The washer is applied by being screwed down
to the nut.
Dated this Eighth day of August 1890
COMPLETE SPECIFICATION.
Securing Nuts to Screwed Bolts.
I, WALTER HARRINGTON of Foley Park, Kidderminster, in the County of
Worcester, Bookkeeper do hereby declare the nature of my said invention and in
what manner the same is to be performed to be particularly described and
ascertained in and by the following statement:-
The combination of a spring and threaded washer effected by forming one or
more corrugations radiating to the centre or otherwise on a washer made of iron,
steel or other suitable material whose inner circumference is partly bevilled to form
one or more threads fitting the bolt. The washer is applied by being screwed down
to the nut.
In order that my invention may be clearly understood & more casily carried into
practice I have appended hereunto sheet of drawings upon which I have fully
illustrated the nature of my said improvement.
Figure is a view from one side of an ordinary screwed bolt and nut shewing
my spring washer in operation.
Figure 2 is a similar view but from the other side of the bolt.
Figure 3 is an elevation of the end of the bolt spring washer and nut shewn in
Figures 1 and 2.
Figure 4 is an elevation of the spring washer detached from the bolt.
Figure 5, is a vertical section through Figure 4.
Figure 6 is an elevation of a modified form of spring washer as will be hereafter
described.
In carrying my invention into effect I form the washer A of iron steel or other
suitable material with the corrugations a¹ & a² formed in a similar shape to that
shewn in Figures 4 & 5. The centre portion a of the washer is cut out to receive
the bolt, and a thread may be formed at a³ and a by hevilling the washer so as to
enable the said edges a³ and a to readily engage with the threads on the bolt. The
washer is cut away at a and a' so that the edges of the washer at that portion of
its internal circumference which is corrugated are clear of the bolt and do not
engage with it which gives the spring corrugation perfect freedom to act.
locking of the nut D on the bolt B is effected by screwing the spring washer A. up
to the nut Das seen in Figures 1 and 2 until the projecting part of the
corrugations a' and a² are pressed tightly against the nut in which position the
washer is retained by the spring of the metal corrugations. The sides a' and a² of
the washers are squared so as to receive the ordinary spanner.
The
I may have more than two corrugations in my washer as shewn in Figure 6
Dr

page_text: where four corrugations a³ are formed the parts-u then engaging with the thread of
the bolt and instead of beviling the edges at a³ and a I may leave them square but
to still engage with the threads in a similar manner or I may form more than one
thread on the washer but generally it will be found sufficient to leave it the edges a*
and a square. The external shape of the washer may be made square or other
shape to suit any spanner.
It will thus be seen that I lock the nut in a very simple and effective manner and
while my spring washer is very cheap it may be readily applied and withdrawn,
and re-used whenever required by the use of an ordinary spanner.
Having now particularly described & ascertained the nature of my said inven-
tion & in what manner the same is to be performed I declare that what I
claim is
1st. The improved means for securing nuts to screwed bolts: substantially as
herein set forth and shewn upon the accompanying sheet of drawings.
2nd. In locking nuts to bolts the spring washer A with a corrugation or
corrugations such as a substantially as and for the purpose herein set forth &
shewn.
GEORGE BARKER,
77, Colmore Row, Birmingham, Agent for Applicant.