Hoisting Drum. 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.
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UNITED STATES PATENT OFFICE
HENRY FISCHER HOWARD, OF CHATTANOOGA, TENNESSEE, ASSIGNOR TO SOUTHERN
WELL WORKS COMPANY, OF BEAUMONT, TEXAS, A CORPORATION OF TEXAS.
HOISTING-DRUM.Specification of Letters Patent.
Patented July 3, 1917.
Application filed June 20, 1913. Serial No. 774,914.
To all whom it may concern:
Be it known that I, HENRY F. HOWARD, a
citizen of the United States, residing at
Chattanooga, in the county of Hamilton and
5 State of Tennessee, have invented certain
new and useful Improvements in Hoisting--
Drums; and I do declare the following to be
a full, clear, and exact description of the in-
vention, such as will enable others skilled in
10 the art to which it appertains to make and
use the same, reference being had to the ac-
companying drawings, and to the letters and
figures of reference marked thereon, which
form a part of this specification..
15 This invention relates to improvements in
hoisting drums or similar shaft driven parts.
Hoisting drums are ordinarily keyed on
their shafts, and include as integral parts
thereof laterally projecting annular flanges
20 which coperate as drums or pulleys with
certain instrumentalities of the machine.
But the torsional stresses developed are
heavy and militate against the permanence
and efficiency of the connection between the
25 drum body and the shaft, causing the con-
nected key to become worn, or sheared with
the result that it rapidly wears loose and
works or falls from position; and the inte-
gral annular flanges which are provided at
30 the sides of the drum body become so worn
as to be useless for their purposes while the
drum body is in good operative condition
with the result that the. drum as a whole,
notwithstanding the good condition of the
35 drum body, has to be discarded and a new
one substituted.
The object of the present invention is to
overcome these difficulties and the invention
satisfies this object by virtue of a new and
40 unitary organization of parts wherein the
drum body is not only fast upon its shaft
but permanently so, and is provided at its
sides with replaceable side flanges at points
where the greatest wear occurs and which
45 serve also the purposes of band or brake pul-
leys or wheels.
An embodiment of the invention is illus-
trated in the accompanying drawings,
wherein:-
50 Figure 1 is a side elevation of a hoisting
drum in which the features of the invention
are incorporated;
Fig. 2 is central longitudinal sectional
view of the organization as a whole, with
55 parts broken away.Similar characters of reference designate
corresponding parts in both of the figures.
The hoisting drum includes a drum body or
.center 1, preferably provided at its ends
with reduced extensions or hubs 2, and with 6
side flanges 5, the drum center, the hubs
and the side flanges being preferably cast
together. The drum is mounted upon a
shaft 3 and the permanence of the fast re-
lation between the drum and said shaft is o5
secured by casting the drum with the shaft.
The shaft preferably is originally provided
with a number of depressions 4, and dur-
ing the casting operation the metal of the
hubs'2 flows into said depressions and there- 70
by establishes a homogeneous or integral
connection of said hubs and said shaft.
In the embodiment shown the drum body
or center 1 is also provided at its ends with
circumscribing flanges 5 which provide for 75
the attachment of the side cheeks 6. As
previously explained these side cheeks take
the place of the integral annular side flanges
with which hoisting drums are usually pro-
vided but according to the present inven- 80
tion they are detachably associated with the
drum body 1, preferably by means of fas-
tening screws 7 which take into the flanges
5 and connect said flanges and the bodies or
frame portions 8 of the cheeks. The bodies 85
or frame portions of the cheeks are pref-
erably formed with disk-shaped recesses or
depressions 9 and the flanges 5 of the
drum center fit into these recesses or
depressions, flush with the inner side faces 90
of. the cheeks, the frame portions 8 en-
circling and fitting close to the hubs 2 be-
low the juncture of the flanges 5 to the drum
center 1 and thus tending to brace and
strengthen the parts at such points. In 95
this way the improved hoisting drum has
the same external appearance and finish as
a hoisting drum of ordinary construction
and there are no projections or obstructions
within the rope or cable channel, and when 100
the cheeks become worn from friction of
the cable therewith, the worn cheek may
be removed and replaced with a new cheek
and thus make the drum practically as effi-
cient as a new drum. This also makes it 105
possible to form the 'drum center and its
side flanges and limbs integral with the
shaft by casting it on the shaft so that the
possibility of separation of the two is
guarded against; and also permits of a 101,,231,611.
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Howard, Henry Fischer. Hoisting Drum., patent, July 3, 1917; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth853652/m1/2/?q=hamilton+county: accessed July 17, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu; crediting UNT Libraries Government Documents Department.