Bolt Lock Page: 2 of 3
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UNITED STATESPATENT. OFFICE.
ROBERT' JOHN ROBINSON, SR., OF S.OMERVILLE, TEXAS.
BOLT-LOCK.Specification of Letters Patent.
Patented Mar. 23, 1915.
Application fled February 14, 1914. Serial No. 818,817.
To all whom it may concern:
Be it known that I, ROBERT JOHN ROBIN-
SON, Sr., a citizen of the United States, re-
siding at Somerville, in the county of Bur-
5 leson and State of Texas, have invented cer-
tain new and useful Improvements in Bolt-
Locks, of which the following is a specifica-
tion, reference being had to the accompany-
ing drawings.
10 This invention relates to certain improve-
ments in bolt blocks, and the object of the
invention is to provide a device of this gen-
eral character having novel and improved
means coacting with the bolt and with the
15 element, to which the bolt is applied, where-
by the bolt is effectively maintained against
axial rotation.
The invention consists in the details of
construction and in the combination and ar-
20 rangement of the several parts -whereby cer-
tain important advantages are attained and
the device is rendered simpler, less expen-
sive and otherwise more convenient and ad-
vantageous for use, all as will be hereinaf-
25 ter more fully set forth.
In order that my invention may be the
better understood, I will now proceed to de-
scribe the same with reference to the accom-
panying drawings, wherein-
30 Figure 1 is a sectional view taken through
a rail joint illustrating a bolt lock arranged
in accordance with an embodiment of my in-
vention; Fig. 2 is a view in top plan and
partly in section further illustrating my im-
35 proved bolt lock, as herein set forth; and
Fig. 3 is a view in side elevation illustrating
my invention as herein embodied.
As herein disclosed, the rails 5-5 are
provided with registering transverse open-
40 ings 6-6 of a much larger diameter than
the bolt holes of_ the ordinary rails, the
walls of the openings in one of such rails 5
being provided with the heavy or deep screw
threads 7 adapted to be engaged by the simi-
45 larly threaded extremities 8 of the locking
or bonding bolts 9, the heads 10 whereof
having.the tapered projections or extensions
11 adapted to be snugly accommodated with-
in the adjacent correspondingly tapered en-
50 larged portions 12 in the outer ends of theopenings 6-6 in one of the rails 5 and
through which openings the shanks 14 of the
bolts loosely pass.
Each of the enlarged portions 12 is inter-
sected by a longitudinally disposed groove s5
or channel 15 produced in the outer face of
the rail and terminating. in oppositely di-
rected extensions 16, while the heads 10 and
their tapered extremities 11 have produced
transversely therethrough suitable openings 60
17 which are adapted to register.with such
grooves or channels 15 when the. same are.
applied in operative position and a locking
key of steel or any other suitable material
capable of effective employment is .directed 65
through each of such openings 17 and adapt-
ed to be substantially entirely accommodated
within the grooves 15 with their opposite ex-
tremities suitably flexed after the key has
been suitably directed through the perfora- 70
tion 17, to be received within the angular
extensions 16 of the grooves or channels 15.
It is also to be observed that the grooves or
channels 15 are of such a length as to read-
ily permit the insertion of the key through 75
the perforation.17. By this arrangement it
will be seen that the bolts 9 are effectively
held against displacement after being op-
eratively applied.
From the foregoing description it is 80
thought to be obvious that a bolt lock con-
structed in accordance with my invention is
of an extremely simple and comparatively
inexpensive nature and is particularly well
adapted for use by reason of the convenience 85
and facility with which it performs its sev-
eral functions and it will also be obvious
that my invention is susceptible of some
change and modification without material
departure from the principles and-. spirit 90
thereof and for this reason I -do not wish
to be understood as limiting myself to the
precise arrangement and formation of the
several parts herein shown in carrying out
my invention in practice except as defined 95
by the appended claim.
I claim:
In combination with two members having
portions disposed in overlying relation, said
overlying portions being provided with reg- 100-1,132,732.
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Robinson, Robert John, Sr. Bolt Lock, patent, March 23, 1915; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth858292/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.