A NEW OR IMPROVED NUT-LOCK
Year: 1882

page_text: LETTERS PATENT to Herbert John Haddan, of Kensington, Middlesox for an
invention of A NEW OR IMPROVED NUT-LOCK A communication from abroad
by William Courtenay, of New York, United States of America
PROVISIONAL SPECIFICATION left by the said Herbert John Haddan at
the Office of the Commissioners of Patents on the 25th April 1882.
HERBERT JOHN HADDAN of Kensington, Middlesex, "A NEW OR IMPROVED
NUT-LOCK," a communication from abroad by William Courtenay, of New York,
United States of America,
This nut-lock is intended primarily for use in places where there is great
vibration tending to release the nut as in the case of fish plates, and by its use
I am enabled to dispense with complicated and expensive locking devices hereto-
fore applied to nuts and washers. The improved nut-lock is a washer, constructed
of the ordinary size and shape, but of the material known as vulcanized or
gelatinized fibre which is a vegetable fibre, usually paper, treated with an
astringent such as sulphuric acid or chloride of zinc, and has well known
frictional and compressive properties which adapt it for use as a washer. This
washer I cover with a cap of some thin and flexible metal such as tin plate.
The cap is secured to the body by having its flange pinched or compressed on to
the latter either entirely around its circumference or at several points only, after
the ordinary manner of securing thimbles to umbrella handles. Wooden washers
have been before made with wrought metallic caps to strengthen the wood, and
fibre washers have been provided with plates of cast iron or other rigid metal
made smaller than the washer and placed between the body of the washer and
the nut. These I do not claim. The cap in my washer can be secured to the
body of fibre by simply compressing or crimping it, and when the nut is screwed
home the part of the washer and cap directly under the nut will be compressed
and that part of the cap which lies outside of the nut will be thereby bent up
around the latter and automatically lock it in position.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Herbert John Haddan in the Great Seal Patent Office on the
17th October 1882.
HERBERT JOHN HADDAN, of Kensington, Middlesex, A NEW OR IMPROVED
NUT-LOCK, a communication from abroad by William Courtenay, of New York,
United States of America.
Figure 1 is a perspective view and Fig 2 an elevation of the nut-lock before used,
and Fig 3 a section showing the nut-lock after it has been applied; similar letters
representing similar parts in the different figures.
A represents the body of the nut-lock or washer. B a thin metallic flanged cap.
C represents the nut and D the bolt. E a fish plate or other object secured by
the bolt.
This nut-lock or washer is intended primarily for use in places where there is
great vibration tending to release the nut as in the case of fish plates and by its
use I am enabled to dispense with complicated and expensive locking devices
heretofore applied to nuts and washers.
The body A of the washer I construct of the ordinary size and shape but of
the material known as vulcanized or gelatinized fibre which is a vegetable fibre,
-usually paper, treated with an astringent such as sulphuric acid or chloride of
zinc, and has well known frictional and compressive properties which-adapt-it_for_|
use as a washer.
This body A, I cover with a cap B of some thin and flexible metal such as tin
plate. The cap B is secured to the body A by having its flange pinched or
compressed on to the latter either entirely around its circumference or at points
-bb, after-the-ordinary-manner of securing thimbles to umbrella handles. Wooden
washers have been before made with wrought metallic caps to strengthen the
wood, and fibre washers have been provided with plates of cast iron or other rigid
_metal_made_smaller than the washer and placed between the body of the washer
and the nut. These I do not claim. The cap in this-washer-can-be-secured_to_
the body of fibre by simply compressing or crimping it and when the nut is
screwed home the part of the washer and cap directly under the nut will be
compressed and that part of the cap which lies outside of the nut, will be thereby
bent up around the latter and automatically lock it in position. As shown in
Fig 3, this locking action will be increased and made effectual by the action of the
weather upon the fibre which will absorb moisture and its uncompressed edges
swell up forcing the cap to bend still further.
It will be understood therefore that by the word fibre I do not mean any
fibrous material but only such as have been treated with astringents so as to be
substantially the same as vulcanized or gelatinized fibre and that the cap B is
to be flanged and secured to the body A by punching crimping or in some
similar way.
What I claim and desire to secure by Letters Patent is :—
1st. A compound washer having a body A of fibre and upon one side only
of the body A a flanged cap B secured to it by pinching or crimping or otherwise.
2nd. A compound washer having a body A of fibre and a flanged cap B made
of thin metal so that the edges of the cap inay tend to bend up around and lock
the nut when the latter is screwed home, substantially as described.
In witness wheroof I the said Herbert John Haddan have hereunto set my
band and seal this seventeenth day of October A.D. 1882.