AN IMPROVED LOCKING WASHER FOR SECURING NUTS ON SCREW BOLTS, AND FOR SIMILAR PURPOSES
Year: 1873

page_text: LETTERS PATENT to Kellogg Hubbard Loomis, of the City and State
of New York, United States of America, now of No. 8, South-
ampton Buildings, London, for the Invention of "AN IMPROVED
LOCKING WASHER FOR SECURING NUTS ON SCREW BOLTS, AND FOR SIMILAR
PURPOSES."
Sealed the 27th December 1873, and dated the 15th October 1873.
COMPLETE SPECIFICATION filed by the said Kellogg Hubbard Loomis
at the Office of the Commissioners of Patents, with his Petition
and Declaration, on the 15th October 1873, pursuant to the 9th
Section of the Patent Law Amendment Act, 1852.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, KELLOGG
HUBBARD LOOMIS, of the City and State of New York, United States
of America, send greeting.
WHEREAS I am in possession of an Invention for "AN IMPROVED
LOCKING WASHER FOR SECURING NUTS ON SCREW BOLTS, AND FOR SIMILAR
PURPOSES," and have petitioned Her Majesty to grant unto me, my
executors, administrators, and assigns, Her Royal Letters Patent for

page_text: the same, and have made solemn Declaration that I am the true and
first Inventor thereof.
•
NOW KNOW YE, that I, the said Kellogg Hubbard Loomis, do hereby
declare that the following Complete Specification, under my hand and
seal, fully describes and ascertains the nature of the said Invention,
and in what manner the same is to be performed, in and by the
following statement, reference being had to the accompanying Drawing
forming a part of this Specification :-
The object of my Invention is the production of a simple, cheap, and
efficient device for locking nuts on screw bolts, as herein-after described,
and for similar purposes.
In order to enable others skilled in the art to which my Invention
appertains to make and use the same I will now proceed to describe
its construction and operation; the Drawing represents three forms of
my Invention, all involving the same principle.
A represents a plate of steel provided in its centre with a bolt
orifice B. In this plate are cut any desired number of curved slots a, a,
opening into the central orifice B, and the lips b, b, b, b, between said cuts
are bent outward from the main plate. The slots a, a, are all cut the
same size, and in the arc of a circle, or nearly so, and the lips b,
between the slots are bent equally outward. This form of my Invention
is shown in Figures 1 and 1ª.
In the form of my Invention shown in Figures 2, 2º, and 2, the
plate A is cut from the central orifice B radially, and the metal around
said orifice forms four lips d, d, d, d, with spaces e, e, e, e, between them.
One corner of each lip d is turned outward, forming a spring.
projection.
In the form of my Invention shown in Figures 3, 34, 3, the two
corners i, ¹, of each lip d are bent towards opposite sides of the
plate A.
The operation of my nut locking device is as follows:- The bolt is
passed through the parts to be secured, and the plate or washer A is then
passed over the end of the bolt; the nut is then screwed on so that it
will revolve and ride forward over the bent projections or springs on
the washer. As the nut is screwed up the projections are corre-
spondingly depressed, and should the nut be turned backward the edges.

page_text: of the series of projections will bear and catch against the inner face
of the nut and hold the same by frictional contact unless considerable
pressure is brought to bear on the nut. It will be seen that the face
of the nut rests upon all of the said projections, and when the nut is
turned forward it rides upon the inclined face of all of the projections,
and should the nut be turned backward the edge of each projection acts
on the face of the nut.
Where the two edges or corners of each lip or projection are turned
outward to the opposite sides the washer itself is in the same manner
held by frictional contact to the surface against which it is placed.
This last form of my Invention is especially applicable to the polished
or finished surfaces of machinery; but either form of washer may be
used wherever it is desired to lock a nut on a bolt; and these washers
may be placed under the heads of bolts or screws, to secure the same in
like manner.
By means of my improved spring washer the nut is held at all times
upon an elastic cushion, so that the expansion and contraction of the
material are compensated for.
Having thus fully described my said Invention, and the manner of
performing the same, I wish it understood that I claim, a locking
washer formed of a plate of spring metal with a bolt orifice, and with
projecting points, substantially as and for the purposes herein set
forth.
In witness whereof I, the said Kellogg Hubbard Loomis, have
hereunto set my hand and seal this Fifteenth day of October,
in the year of our Lord One thousand eight hundred and
seventy-three.
Witness,
W. ROB. LAKE.
K. H. LOOMIS. (L.S.)