Derrick. Page: 2 of 3
This patent is part of the collection entitled: Texas Patents and was provided to The Portal to Texas History by the UNT Libraries Government Documents Department.
Extracted Text
The following text was automatically extracted from the image on this page using optical character recognition software:
UNITED STATES PATENT OFFICE.
WILLIAM[ E. LINDSEY, OF LARISSA, TEXAS.
DERRICK.
SPECIFICATION forming part of Letters Patent No. 450,695, dated April 21, 1891.
Application filed December 9, 1890. Serial No, 374,057. (No model,)To all whom it 7n7sy concer:.'7
Be it known that I, WILLIAti E. LINDSEY, a
citizen of the United States, residing at La-
rissa, in the county of Cherokee and State of
5 Texas, have invented certain new and useful
Improvements in Derricks; and I do declare
the following to be a full, clear, and exact de-
scription of the invention, such as will enable
others skilled in the art to which it apper-
io tains to make and use the same, reference be-
ing had to the accompanying drawings, and
to the letters of reference marked thereon,
which form a part of this specification.
This invention relates to certain new and
15 useful improvements in derricks or machines
or devices for hoisting stone, heavy timbers,
or any other articles; and it has for its ob-
jects,amongothers,to provide a simple, cheap,
easily erected and operated device of this
20 character which can be manipulated with ease
and by which the article being elevated or
lowered may be changed in position without
moving the support. I provide a swiveled
block or plate, on which the operating-lever
25 is pivoted or fulerumed. I provide for vary-
ing of the pivot of the lever to give greater or
less leverage. I make the brace of the sup-
port serve as a guide for the lower pulley, so.
that it may be swung around at pleasure.
30 Other objects and advantages of the inven-
tion will hereinafter appear, and the novel
features thereof will be specifically defined
a by the appended claims.
The novelty in the present instance resides
35 in the peculiar combinations and the con-
struction, arrangement, and adaptation of
parts, all as more fully hereinafter described,
shown in the drawings, and then particularly
pointed out in the claims.
40 The invention is clearly illustrated in the
accompanying drawings, which, with the let-
ters of reference marked thereon, form a part
of this specification, and in which---
Figure 1 is a perspective view of the im-
45 proved derrick in position for use. Fig. 2 is
a vertical section through the turn-table on
which the operating-lever is pivoted.
Like letters of reference indicate like parts
in both of the views.
50 Referring now to the details of the draw-
ings by letter, A designates a support, which
is preferably of the tripod form shown to com-bine strength with lightness. Other forms of
support may, however, be employed in connec-
tion with the other features of the invention,
and perhaps serve equally as well.
The frame is suitably braced near the bot-
tom by braces a, and other braces may be em-
ployed, if found necessary. I have found it
sometimes advisable to employ additional
braces, such as b, at a point about one-third
the height of the tripod, and have usually
formed these braces in the following manner:
I take a stou.twireor rod and pass it through
openings in the uprights of the tripod and se-
cure the ends in any suitable manner. This
wire or rod serves not only as a brace but also
as a guide for the lower pulley or roller, which
will soon be described. The uprights of the
tripod are at their upper ends cut away to
form horizontal shoulders or bearings c, and
the said uprights are braced at their upper
ends by the short triangular braces B, which
are so arranged that their upper faces will be
on a level or flush with the said shoulders or
horizontal bearings to form a broad bearing-
surface for the plate C, which is secured be-
tween the upper ends of the uprights and
rests upon the said braces and bearings, as
plainly shown in the drawings. This plate
may be secured rigidly in place in any suit-
,able manner, as, for instance, by screws or
nails passed through the plate from the outer
edges into the ends of the uprights or from
the uprights into the plate,
D is a turn-table adapted to turn upon the
plate C, and it is swiveled thereto by the ver-
tical pin E, held to the turn-table and passed
loosely through an opening in the said plate.
Secured to the upper face of the turn-table is
the substantially inverted-U-shaped plate or
yoke F, through the horizontal portion of
which the said pin E passes, and it is further
secured by additional fastenings, as e. The
vertical substantially parallel portions of the
yoke are provided with a plurality of holes f,
so that the fulcrum of the operating-lever may
be changed as occasion may require.
G is the operating-lever of suitable material
and length, according to the character of the
work for which the device is to be employed.
It is provided at one end with a hook or other
equivalent device g, from which is loosely sus-
pended an equalizing-bar H, to the ends of
Upcoming Pages
Here’s what’s next.
Search Inside
This patent can be searched. Note: Results may vary based on the legibility of text within the document.
Tools / Downloads
Get a copy of this page or view the extracted text.
Citing and Sharing
Basic information for referencing this web page. We also provide extended guidance on usage rights, references, copying or embedding.
Reference the current page of this Patent.
Lindsey, William E. Derrick., patent, April 21, 1891; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth172673/m1/2/?q=%22%22~1: accessed July 12, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.