AN IMPROVED NUT-LOCKING DEVICE."
Year: 1881

page_text: LETTERS PATENT to Simon Danischewsky, of Paris, in the Department of
the Seine and Republic of France, Civil Engineer, for an Invention of
AN IMPROVED NUT-LOCKING DEVICE."
"T
PROVISIONAL SPECIFICATION left by the said Simon Danischewsky at the
Office of the Commissioners of Patents on the 4th November 1881.
SIMON DANISCHEWSKY, of Paris, in the Department of the Scine and Republic
of France, Civil Engineer. "AN IMPROVED NUT-LOCKING DEVICE."
The object of my Invention is to prevent nuts from unscrewing of themselves
after having been screwed in place and suitably tightened up.
My Invention will be readily understood by reference to the accompanying
Sheet of Drawing. It consists in placing between the nut A and the piece B.
which serves for its bearing or fulcrum, and through which passes the bolt C or
the screw tapped rod upon which the nut is screwed, a plate D of any kind of
metal suitable for making springs. This plate is fixed to the piece B by screws or
otherwise; it is square or of any other form, and is pierced in the centre with a
circular hole, or a hole of any shape corresponding with the section presented by
the end of the bolt C, or of the rod upon which the nut A is screwed, which bolt
or rod passes through this plate when placed to receive the nut.
This plate D is furnished with catches E, or elastic tongues forming springs,
obtained by cutting in the plate or on its edges small pieces or blades, the raised
end of which projects above the plate. It is against these projecting ends that
one of the sides of the nut bears to prevent its unscrewing. These blades are cut
out squarely, diagonally, or in any other way in relation to each other, according
to the shape of the sides of the nut. A single blade or catch may be used, or
several blades of any form, in order to increase the number of stops, each catch or
tongue acting separately and successively, so that with a six sided nut, for example,
the nut may be screwed up and stopped or fixed at each twelfth part of its circum-
ference. The tongues or spring catches E should be cut out of the plate, so that
their inner edge comes even with the side of the nut which presses against it to
form an obstacle to its uncrewing.

page_text: To unscrew the nut it is only necessary to press down with the finger the end
of the catch or tongue E projecting above the plate. I however find it preferable
to place a metal washer such as shewn, Figures VII. and VIII., and then by applying
the key or wrench the spring catches or tongues lower naturally, and the unscrewing
of the nut takes place with facility.
On the Drawing,-
Figure 1 shows in elevation my nut locking device with two spring catches or
tongues.
Figure II. being a plan view of same.
'
Figure III., elevation of a fish plate for railways, this plate having four spring
catches or tongues.
Figure IV., plan of same.
Figure V. is an elevation of a fish plate for railways with four spring catches or
tongues in another form.
Figure VI. being a plan view of same.
Figure VII. is an elevation of the washer for lowering the spring catches or
tongues, and
Figure VIII., a plan of said washer.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Simon Danischewsky in the Great Seal Patent Office on the
2nd May 1882.
SIMON DANISCHEWSKY, of Paris, in the Department of the Seine and Republic
of France, Civil Engineer. "AN IMPROVED NUT-LOCKING DEVICE."
My Invention relates to an improved nut-locking-device in which spring catches
or tongues cut out of a plate interposed between the nut and the piece which
serves for its bearing or fulcrum, press against the nut with the object of preventing
its unscrewing of itself, or shaking loose after having been screwed in place and
suitably tightened up.
I attain this object by the device illustrated in the accompanying Drawing, in
which
Figure 1. is an elevation of my nut-locking device with two spring catches or
tongues; Figure II. being a plan view of same; Figure III., an elevation of a fish
plate for railways, this plate having four spring catches or tongues; Figure IV.
being a plan of same; Figure V. is an elevation of a tishplate for railways, with
four spring catches or tongues in another form; Figure VI. being a plan view of
same; Figure VII. is an elevation of a washer for lowering the spring catches or
tongues; and Figure VIII., a plan of said washer.
Similar letters refer to similar parts throughout the several views.
Between the nut A and the piece B, which serves for its fulcrum, and through
which passes the bolt C, or the tapped rod upon which the nut is screwed is placed
a plate D of any kind of metal suitable for making springs. This plate is fixed to
the piece B by screws or otherwise; it is square, or of any other form, and is
pierced in the centre with a circular hole, or a hole of any shape corresponding
with the section presented by the end of the bolt C, or of the rod upon which the
nut A is screwed, which bolt or rod passes through this plate when placed to
receive the nut.
This plate D is furnished with catches E or elastic tongues forming springs,
obtained by cutting in the plate or on its edges small pieces or blades, the raised
end of which projects above the plate. It is against these projecting ends that
one of the sides of the nut bears to prevent its unscrewing. These blades are cut
out squarely, diagonally, or in any other way in relation to each other, according
to the shape of the sides of the nut. Two blades or catches may be used, or several
blades of any form, in order to increase the number of stops, each catch or tongue
acting separately and successively, so that with a six sided nut, for example, the
nut may be screwed up and stopped or fixed at each twelfth part of its circum-
ference. The tongues or spring catches E should be cut out of the plate, so that
their inner edge comes even with the side of the nut which presses against it to
form an obstacle to its unscrewing.
To unscrew the nut it is only necessary to press down with the finger the end
of the catch or tongue E projecting above the plate. I, however, find it preferable
to place a metal washer such as shown, Figures VII. and VIII., and then by
applying the key or wrench the spring catches or tongues lower naturally, and the
unscrewing of the nut takes with facility.
Having now described and ascertained the nature of my said Invention, and
in what manner the same is or may be performed,
I claim as secured to me by the herein before in part recited Letters Patent,―
Firstly. The use of a plate suitable for making springs between the nut and the
piece which it secures or tightens up.

page_text: Secondly. The use of these spring catches or tongues to prevent the nuts from
unscrewing or shaking loose.
Thirdly. The use of a plate of circular or other form, with an opening cut out of
the centre, for lowering the springs by means of the key, so that the nuts may be
easily unscrewed, substantially as described.
In witness whereof, I, the said Simon Danischewsky, have hereunto set
my hand and seal, this Twenty fourth day of April, in the year of our
Lord One thousand eight hundred and eighty two.
122HOWEV
BANISCHEWSK
(i.c.)