Lock-Nut. Page: 2 of 3
[1], 2 p. : ill. ; 23 cm.View a full description of this patent.
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UNITED STATES PATENT OFFICE
THOMAS T. MITCHELL, OF JOAQUIN, TEXAS, ASSIGNOR OF ONE-HALF .TO MARVIN R.
CRAWFORD, OF JOAQUIN, TEXAS.
LOCK-NUT.1,155,949.
Specification of Letters Patent.
Patented Oct. 5,1915.
Application filed 'February 15, 1915. Serial No. 8,359.
To all whom it may concern:
Be it known that I, THOMAS T. MITCHELL,
a citizen of the United States, residing at
Joaquin, in the county of Shelby and State
5 of Texas, have invented certain new and
useful Improvements in Lock-Nuts; and I
do hereby declare the following to be a full,
clear, and exact description of the invention,
such as will enable others skilled in the art
10 to which it appertains to make and use the
same.
This invention relates to lock nuts, and
has for its object to provide a nut with
novel and efficient means for reliably locking
15 the nut against rotation upon the bolt.
With these and other objects in view, the
invention consists of the novel construction,
arrangement and formation of parts as will
be hereinafter specifically described, claimed
20 and illustrated in the accompanying draw-
ing, in which:
Figure 1 represents a sectional view on
the line 1-1 of Fig. 2, illustrating the lock
nut applied to use. Fig. 2 represents an end
25 elevation of the nut lock, partly in section.
Fig. 3 represents a side elevation taken at
right angles to Fig. 1, showing the nut
partly in section. Fig. 4 represents a per-
spective view of one of the locking pins or
30 keys removed. Fig. 5 represents a perspec-
tive view of a slightly modified type of lock-
ing pin, and Fig. 6 represents a perspective
view of the pin locking plate removed.
Referring to the drawing in detail, where-
35 in similar reference numerals designate cor-
responding parts throughout . the several
views, the numeral 5 indicates the shank of
a bolt of the usual or any preferred con-
struction having a head 6 at one end and
40 screwthreads 7 extending inwardly from the
opposite end. A preferred type of nut 8 is
threaded upon the shank 5 and is formed
with the usual internally screwthreaded bore
9 extending axially therethrough. An open-
45 ing 10 is formed through the nut 8 parallel
with the bore 9 thereof and is preferably rec-
tangular in cross section, as clearly illus-
trated in Fig. 2, to snugly receive the pin
locking plate 11 having one end rounded, as
50 indicated at 12, and formed adjacent its op-
posite end with a notch 13. On one side of
the rectangular opening 10 the nut 8 is
formed with a pair of spaced openings 14 ex-
tending at right angles to the opening 10 and
ss intersecting the latter and the internallyscrewthreaded bore 9. On the opposite side
of the rectangular opening '10, and between
the openings 14, an opening 15 is formed
through the nut 8 and also intersects the
opening 10 and bore 9. Locking pins 16 60
preferably rectangular in cross section and
formed with inner pointed ends 17 are slid-
ably mounted within the openings 14 and 15
and are formed upon the longitudinal edges
adjacent the opening 10 with notches 18 de- 65
fining transverse shoulders 19 disposed in-
wardly of the inner wall of the rectangular
opening 10 when the pins are operatively po-
sitioned in the nut 8. The pin locking plate
11 is removably engaged within the rectan- 70
gular .opening 10, engages the shoulders. 19
of the locking pins and is secured against
removal by a locking member 20 pivotally
secured at 21 in a recess formed in the outer
face of the nut and adapted to engage with- 75
in the notch 13 of the plate 11. The type of
locking pin illustrated in Fig. 5 is formed
upon its opposite longitudinal edges with
notches 22 defining transverse shoulders 23
and having its inner end: 24 pointed. This 80
type of locking pin is reversible and may be
positioned to direct the pointed end 24 there-
of inwardly toward the center of the bolt
shank 5 or outwardly from the latter.
In use, the nut 8 is advanced to the de- 85
sired position upon the threaded end of the
bolt shank 5 and the several locking pins 16
are positioned within the openings 14 and 15
and are driven inwardly with a suitable
tool to embed the points 24 thereof in the 90
threads of the bolt shank 5 to reliably lock
the nut against rotation. When the shoul-
ders. 19 or 23 of the locking pins are disposed
flush with or inwardly of the inner wall of
the rectangular opening 10 the locking plate 95
11 is slipped into the rectangular opening 10,
engages the transverse shoulders 19 of the
locking pins and thus reliably lock the latter
against removal. The pivoted . locking
member 20 is subsequently swung to the po- 100
sition illustrated in Fig. 2 so as to engage
within the notch 13 of the locking plate 11
and thus reliably secure the latter against
loss, or removal.
WhatI claim is: .105
1. A lock nut comprising a nut having an
axial bore and a plurality of transverse
openings intersecting said bore, a locking
pin slidably mounted in each of the trans-
verse openings having its inner end pointed, 1
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Mitchell, Thomas T. Lock-Nut., patent, October 5, 1915; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth860122/m1/2/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu; crediting UNT Libraries Government Documents Department.