An Improved Nut-lock.
Year: 1892

page_text: Date of Application, 27th May, 1892
Complete Specification Left, 27th Feb., 1893-Accepted, 1st Apr., 1893
PROVISIONAL SPECIFICATION.
An Improved Nut-lock.
We, THEODORE H. APGAR, and JOHN M. DRINKWATER, both of Bound
Brook, New Jersey, U.S.A. Inventors, do hereby declare the nature of this
invention to be as follows:-
Our invention relates to improvements in devices for securing nuts in position on
bolts; and the objects of the invention are, first, to provide a simple, cheap, and
effective device for locking a nut against rotation on a bolt, which device can be
quickly removed to change the position on or remove the nut from the bolt, and,
second, to provide a fastening which will not destroy the usefulness of the nut on
which it is placed.
With these ends in view my invention consists in a nut provided with a radial
passage extending from the outer surface to the central threaded opening of the
nut and another diagonal passage extending from one face or surface of the nut to
another surface at an angle to the radial passage, and pins fitted in said passages
and contacting one with the other, the inner end of one of said pins engaging with
the threaded end of the bolt on which the nut is placed.
A nut is fitted on the bolt, and which nut is provided with a radial passage,
which extends from the outer surface of the nut to the central threaded opening in
the nut.
Within the passage is fitted a pin, the inner end of which engages with
the threaded portion of the bolt. One surface of this pin is flattened.
The nut is
also provided with another passage, which extends from one face or surface of the
nut (at an angle to the passage, with which it intersects) to an adjacent or
adjoining face of the nut. In this passage is fitted a pin, which has one of its
surfaces made flat, said surface contacting with the flat surface on the pin.
The method of applying our lock is as follows:-The nut is first screwed or
turned the proper distance on the bolt, and the pin is then forced into the passage
with its flat surface down, and its inner end, which is preferably serrated, takes into
the threaded portion of the bolt. The pin is then inserted in the passage with its
flattened surface uppermost. This pin operates as a wedge to force the other pin
closely against the walls of the passage and the thread of the bolt, and the latter
pin is held so tight that its inner end cannot be disengaged from the thread of the
bolt or the pin itself be removed from the nut without first removing the wedging
or confining pin. The inner end of the pin is forced into such close contact with
the thread of the bolt that it cannot move, and the nut is thus held firmly in
place.
To remove the nut the pin is forced out of the passage, and then the other pin
can be readily removed to allow the nut to be turned on the bolt. It will be
understood that this device does not in any way impair the usefulness of the nut,
which may be used as often as desired.
To facilitate the removal of the pin, I form in one face of the nut a re-entrant
angle, through which one end of the passage opens.
am aware that changes in the form and proportion of parts and details of
construction of the devices herein shown and described as an embodiment of my
invention can be made without departing from the spirit or sacrificing the
advantages thereof, and I therefore reserve the right to make such changes as
fairly fall within the scope of my invention.
Dated this 27th day of May 1892
W. H. MUNNS,
Applicants' Agent.

page_text: COMPLETE
SPECIFICATION.
An Improved Nut-lock.
We THEODORE HIGGINS APGAR, and JOHN MANASSEH DRINKWATER, both
of Bound Brook, New Jersey, U.S.A. Inventors 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 :-
Our invention relates to improvements in devices for securing nuts in position on
bolts; and the objects of our invention are, first, to provide a simple, cheap, and
effective device for locking a nut against rotation on a bolt, which device can be
quickly removed to change the position on or remove the nut from the bolt; and,
second, to provide a fastening which will not destroy the usefulness of the nut on
which it is placed.
With these ends in view our invention consists in a nut provided with a radial
passage extending from the outer surface of the central threaded opening of the
nut and another diagonal passage extending from one face or surface of the nut to
another face at an angle to the radial passage, and pins fitted in said passages and
contracting one with the other, the inner end of one of said pins engaging with the
threaded end of the bolt on which the nut is placed.
Our invention further consists in the peculiar construction and arrangement of
parts as will be hereinafter more fully pointed out and claimed.
To enable others to more readily understand our invention we have illustrated
the same in the accompanying drawings in which
Fig. 1 is a perspective view of a nut fitted on a bolt and having our improved
fastening applied thereto.
Fig. 2 is an enlarged sectional view through the nut and bolt, and
Fig. 3 is a detail view of the locking pins.
Fig. 4 is a detail view of nut with pins removed.
Like letters of reference denote corresponding parts in the several figures of the
drawings in which
A designates a bolt, on which is fitted a nut B. The nut B is provided with a
radial passage a, which extends from the outer surface of the nut to the central
threaded opening in the nut. Within the passage a is fitted a pin b, the inner end
of which engages with the threaded portion of the bolt A. One surface 6¹ of this
pin bis flattened, as shown in Fig. 3.-
The nut B is also provided with another passage c, which extends from one face
or surface of the nut (at an angle to the passage a, with which it intersects) to an
adjacent or adjoining face of the nut.
In this passage c is fitted a pin d, which has
one of its surfaces made flat, said surface contacting with the flat surface 6¹ on the
pin b.
The method of applying my lock is as follows:-The nut is first screwed or
turned the proper distance on the bolt A, and the pin bis then forced into the
passage a with its flat surface down, and its inner end, which is preferably serrated,
as shown in Fig. 3, takes into the threaded portion of the bolt. The pin d is then
inserted in the passage c with its flattened surface uppermost. The pin d operates
as a wedge to force the pin 6 closely against the walls of the passage a and the
thread of the bolt, and the latter pin is held so tight that its inner end cannot be
disengaged from the thread of the bolt or the pin itself be removed from the nut
without first removing the wedging or confining pin d. The inner end of the pin o
is forced into such close contact with the thread of the bolt that it cannot move,
and the nut is thus held firmly in place.
To remove the nut the pin d is forced out of the passage c, and then the pin b
can be readily removed to allow the nut to be turned on the bolt. It will be
noticed that this device does not in any way impair the usefulness of the nut, which
may be used as often as desired.

page_text: To facilitate the removal of the pin d, we form in one face of the nut a re-entrant
angle e, through which one end of the passage c opens.
I am aware that changes in the form and proportion of parts and details of
construction of the devices herein shown and described as an embodiment of our
invention can be made without departing from the spirit or sacrificing the
advantages thereof, and we therefore reserve the right to make such changes as
fairly fall within the scope of our invention.
Having now particularly described and ascertained the nature of our invention
and in what manner the same is to be performed, we declare that what we
claim is :-
The combination, with a bolt, of a nut provided with the intersecting horizontal
passages a c, arranged at right angles to each other, and the pins bd, fitted in said
passages and having their meeting surfaces flattened the pin b extending from one
side of the nut to the central threaded passage therein, and the pin d extending
from one face of the nut to an adjoining face substantially as shown and
described.
Tend this Twath d
1000
W. H. MUNNS,
Agent for Applicants.