An Improved Self-locking Nut and Bolt.
Year: 1886

page_text: Date of Application, 13th Oct., 1886.
Complete Left, 26th May, 1887.
Complete Accepted, 12th July, 1887.
PROVISIONAL SPECIFICATION.
An Improved Self-locking Nut and Bolt.
THOMAS ROWE WESTON 61 Hampton Park Bristol Iron Merchant do hereby declare
the nature of this invention to be as follows:-
An improved method of locking Nuts upon Bolts whereby the Nuts will not move
from the position they are set upon the Bolts by vibration or any like force ;-The
manner in which I accomplish this, is, I make upon the Nut or Bolt one or more
bulges, burs, pins or such like protrusions, which shall lock into certain indentures,
waves, angles, curves, grooves or such like depressions which shall be made upon the
Nut or Bolt, so that the Nut shall be locked upon the Bolt, and the Bolt and Nut shall
become a Self-Locking Nut and Bolt.
THOMAS ROWE WESTON.
I, THOMAS ROWE WESTON, of 61 Hampton Park, in the City and County of Bristol,
iron merchant, 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 this invention is to cause an iron or steel nut to have an efficient
locking or fastening action for securing it upon an iron or steel bolt in such a manner
that the nut shall not be liable, under the influence of vibration, to move from any
D

page_text: part at which it may have been set upon the bolt. For this purpose I make upon the
nut one or more pins, bulges, burrs or protrusions thereby affecting the substance,
fibre, construction and thread of the nut in such a way, that the nut shall be caused to
fasten upon or take hold of (within the hole of the nut through which the bolt is to
pass) certain indentations, waves, angles or the like, which shall be made upon the bolt
incident to the manufacture and screwing of the bolt, but, further, like depressions
may be expressly made upon the bolt when required, in order to give additional
locking effect to the nut and bolt.
Referring to the annexed drawings, Fig. 1 shows a side view of a square nut, which
has been stamped, indented, punctured or otherwise treated on the side (as indicated
by the letter a) thereby bulging and protruding and so affecting the substance, fibre,
construction and thread of the nut, that the nut shall be caused to fasten upon or
take hold of (within the hole of the nut through which the bolt is to pass) a screwed
bolt.
Figs. 2 and 3 are modifications of Fig. 1, the letters band c indicating in each case
respectively the form of indentations produced by the stamp, die or tool used for the
purpose. Figs. 4 and 5 represent further modifications in which the indentations,
burrs or pins are on the faces of two square nuts. The protrusions in the thread of
the nut are indicated in each case respectively at an exaggerated scale by the letters d
and e. Fig. 6 represents a view of a screwed bolt.
It is to be understood that I do not bind myself to any particular number of pins,
bulges, burrs, protrusions, indentations, waves, angles or such like, or to their con-
struction, or to their form or to their position (on the nut and bolt or either of them or
both of them) or to any particular extent and effect thereof, so long as they have
the effect of making the nut and bolt self locking, substantially as herein before set
forth.
Unions, joints or caps and the like, having internal screw threads for connecting
pipes, rods and so forth may be treated similarly for a like purpose.
Having now particularly described and ascertained the nature of this invention,
and in what manner the same is to be performed, I declare that what I claim is :-
1. A nut made self locking substantially in the manner hereinbefore described.
2. An improved self lock nut and bolt substantially as described.
W. LLOYD WISE,
46, Lincoln's Inn Fields, London, W.C.,
Agent for the Applicant.