Improvements in Locking Bolts and Nuts and the like.
Year: 1895

page_text: COMPLETE SPECIFICATION.
Improvements in Locking Bolts and Nuts and the like.
1, FREDERICK SOUL, Mechanician of Magdeburg, Germany, 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 purpose of this invention is to prevent bolts and nuts liable to frequent
concussions from turning back spontaneously, while allowing them easily to be
unscrewed, when intended. It is illustrated in the drawing by the "Figures (-IV,"
in four different ways of application, and principally consists in a metallic spiral
spring "af" spanning the uncovered part of a screw-worm "S" closely before
the nut or its substitute, to which the spring is fixed, and preventing by its
quality and way of fixation the nut, bolt, or the like, from turning back.
Figs. 14"
show the locking of a bolt-screw in a six cornered nut "m" intended
for being turned by a screw-wrench. It is provided with an elastic cramp
shown alone in " Fig. 1."
86
"
66
"F"
afb" with the cramp "F" fixed on a bolt-
Fig. I" shows the spring
screw "S" as seen from the side.
"Fig. 1" shows the same seen from above.
CC
"
"
55
Fig. 1
Fig. 1
"
shows nut "m "with spring
shows the spring "af" and
af b" and cramp "F" without bolt.
Fig. 1 shows the elastic cramp "F" alone.
Figs. 11A & B"
"
">
show the locking of a thumb-nut "m on a bolt "S."
Fig. 11 shows the same as seen from the side and "Fig. II" the same as seen
from above.
Figs. 111 & "show the locking of a knob-screw "S," screwed into the nut
of some solid body "M."
"
Fig. 111" shows the locking spring "af" of the knob-screw alone.
"Figs. IVA & "" show the locking of a low nut "m" on a pivot "S" with
narrow thread.
66
‘Fig. IVª” shows the section of the same as seen from the side and "Fig. IVª”
from above.
The locking is brought about by a spring "af" spanning the uncovered part of
the screw-worm "S."
"
"
to the nut
a
<6
"
or the body
m
Fig. II
This spring is fixed by its end",
M" containing
a female screw, and that in "Fig. 1" and "Fig. III" by a boring, in "
by a screwing on, and in " Fig. IV" by the perforation of a pin “z' screwed into
the nut m.
"
"
As the end "a" of the spring "a jb," fixed to the nut or the body containing
a female screw, cannot roll itself up, the nut or bolt is prevented from turning back.
In order to render an intentional unscrewing of the nuts m m "in "Figs. 1. 11. &
IV." or of the screw "S" in "Fig. III" possible, the unfettered part "' of the
spring should be pressed backward, by doing which the tension of the spring will
be made to cease.
46 afb
"
In order to give the spring
a point by which it may be touched for
the purpose of this manipulation, this end "b" is angularly bent upward.
If you wish to unscrew nuts or bolts, "Fig. 1," please to make use of an elastio
cramp "F," shown in "Figs. 1A, B, & c " when applied, in "Fig. I " by itself
alone.

page_text: In order to make use of the cramp "F," please to compress it and put it on the
ends "a & 6" of the spring "f" prepared for this purpose.
be unscrewed.
"
As soon as you leave off pressing the cramp "," it will do its effect, and the
tension of the spring will cease, so that the nut "m or the bolt "S" may easily
It must explicitly be stated that the unfettered part "6" of the spring
"afb"
must not touch the nut or the body containing the female screw, that this invention
therefore is quite different from the application of check-nuts.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is:
:-
"Improvements in locking bolts and nuts and the like, consisting in the applica-
tion of a metallic spring afb-of which the windings span some of the windings
of a screw-bolt closely before the nut or the body containing the female screw,-
and of which the end }
tending to wind itself up when the nut or screw tends
to recede, is fixed to the nut or body containing the female screw and by this
prevents the nut as well as the bolt from turning back, and of which the tension
is made to cease by a pressure on the unfettered end 'b' of it, a manipulation
to be facilitated by the application of an elastic cramp 'F.'"
Dated this 12th day of February 1895.
FREDERICK SOHL,
Of Magdeburg, Germany, Mechanician.