Loading and Unloading Mechanism for Mixing-Drums or Other Receptacles Page: 6 of 10
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UNITED STATESPATENT OFFICE,
WILLIAM BERTON HAHN, OF PARIS, TEXAS.
LOADING AND UNL6ADING MECHANISM FOR MIXING-DRUMS OR OTHER RECEPTACLES.
Specification of Letters Patent. Patented May 27,1913.
Application filed April 13, 1912. Serial No. 690,535.
To aN whom it may concern:
Be it 'known that I, WILLIAM BFrwoN
HAHN, a citizen of the United States, re-
siding at Paris, in the county of Lamar-
5 and State of Texas, have invented certain
new and useful Improvements in Loading
and Unloading Mechanism for Mixing-
Drums or other Receptacles, of which the
following is a specification.
10 The . chief purpose of this invention is
to improve the practical working of as-
phalt and concrete mixers by regulating.
the alternate action of the loading and un-
loading mechanism and insuring its effi-
15 ciency and certainty of action.* It is,
however, obviously applicable to other re-
ceptacles, 'arts and purposes.
To this end the said invention consists
mainly in certain improvements in meeha-
20 nism for operating the pivoted charging
bucket; in certain improvements in mecha-
nism for hanging and operating the dis-
charging spout; in certain improvements
in mechanism combining with the latter a
25 cut-off suspending both the door and the
spout from the same shaft and causing
their alternate action and cooperationn; in
certain mechanism for combining the ac-
tion of said spout and charging bucket in
30 order that the driving shaft may throw
them into operative position; in certain
yielding adjustable mechanism whereby the
movement of the discharge spout in one
direction will automatically cease when a
35 certain predetermined degree of strain is
reached and in divers incidental features of
improvement, all as hereinafter set forth
In the accompanying'drawings: Figure 1
40 represents a side elevation of a mixing ma-
chine embodying my invention; Fig. 2, a
similar view of the other side of the ma-
chine, facing in the opposite direction; Fig.
3, an end elevation of the machine, illus-
45 trating the feeding and discharging opera-
tions, the charging bucket being shown in
its upper and lower positions respectively
in solid and dotted lines and the discharge
spout being shown in three positions, posi-
50 tion one in solid lines, the others in dotted
lines; Fig. 4, a .horizontal section on the
line 4-4 of Figs. 1, 2 and 3; Fig. 5, a de-
tail vertical central section on the mixing
drum and _of certain proximate parts, some
of the .latter being in elevation and other 55
partly broken away; Fig. 6, a detail, cen-
tral section of a sprocket wheel on the rock-
shaft through which the discharge spout is
operated; Fig. 7, some of the devices, partly
in section and partly in elevation, for op- 60
erating- said rock-shaft from the counter-
shaft of the engine; Fig. 8 represents in
central section the clutch devices used in
operating the feed spout; and Fig. 9, rep-
resents in detail, vertical section the rock- 65
shaft operating clutch and bevel gears,
shown in plan in Fig. 4 and partly in de-
tail side elevation in Fig. 7.
A designates the truck frame of my port-
able concrete mixing and asphalt-heating 70
and mixing mechanism carried by trans-
porting wheels B.
In the complete machine as usually con-
structed a furnace C and boiler D are
mounted on opposite sides of said truck, 75
the former for supplying hot air, when de-
sired, through a pipe E to the interior of
the mixing drum I, the latter (D) for sup-
plying steam through pipe H to an engine
F having smoke stack f and supported in 80
frame G on said truck, said engine being
provided with the usual governor J, pis-
ton rod K, cross-head L and pitman M, the
latter connected by crank 0 to the driving
shaft of the machine. Said drum is of the 85
ordinary double conoidal form having a
broad cylindrical middle part and provided .
with annular tracks 4 whereby it turns two
pairs of wheels 2 mounted at fixed points
of the said truck. Said drum also has a 90
pair of cog-wheels 5 driven by said driving
shaft, suitable gearing which may consist
for example of gear-wheel 9 and pinions
7 on shaft 8 and the connecting gears 3 and
6. A counter shaft 10 and its gear wheel 95
11 are driven by an additional pinion 12 on
said shaft 8. The fly-wheel 13 of shaft N
is also a belt wheel, being utilized to drive
a draft fan 15 when the air is to be forced
through pipe E. The drum has as usual an 100
internal series of buckets or stirrers 16.
The construction of said drum is not
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Hahn, William Berton. Loading and Unloading Mechanism for Mixing-Drums or Other Receptacles, patent, May 27, 1913; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth853806/m1/6/: accessed April 25, 2019), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu; crediting UNT Libraries Government Documents Department.