IMPROVEMENTS IN APPARATUS FOR CONVEYING CEMENT OR OTHER PULVERULENT OR GRANULAR SUBSTANCES FROM ONE LOCALITY TO ANOTHER.
Year: 1879

page_text: LETTERS PATENT to Robert Andrew Gibbons, of Northfleet, in the County
of Kent, for the Invention of "IMPROVEMENTS IN APPARATUS FOR CONVEYING
CEMENT OR OTHER PULVERULENT OR GRANULAR SUBSTANCES FROM ONE
LOCALITY TO ANOTHER.
"
Sealed the 27th December 1879, and dated the 7th July 1879.
OTHER
" IMPROVE-
PULVERULENT
OR
PROVISIONAL SPECIFICATION left by the said Robert Andrew Gibbons at
the Office of the Commissioners of Patents on the 7th July 1879.
ROBERT ANDREW GIBBONS, of Northfleet, in the County of Kent.
MENTS IN APPARATUS FOR CONVEYING CEMENT OR
GRANULAR SUBSTANCES FROM ONE LOCALITY TO ANOTHER."
Pulverulent and granular substances have frequently been conveyed horizontally
from one locality to another through tubes or channels in which an archemedian
screw was made to revolve, the pulverulent body being propelled along the tube
by the action of the screw. It has been found however that such apparatus is
not applicable for conveying dense pulverulent substances such as cement, coal
dust or slack, and the like, because these tend to cake together and thus clog the
screw.'
According to my present Invention I employ for the above purpose a trough,
tube, or channel, in which is a longitudinal shaft supported in bearings at intervals,
and having fixed thereon a number of radial arms or blades at short distances apart
in a longitudinal direction and at equal distances apart round the circumference,
the arins or blades being so formed with inclined or oblique surfaces that as they
revolve with the shaft the one blade moves the cement or other pulverulent
material lying in its path into the path of the next one which in its turn conveys
it into the path of the next following one, and so on, the material being thus
gradually conveyed step by step from the one end of the trough to the other. By
preference I construct the blades or arms separate from the shaft, and I fix upon
the latter a series of bosses, each of which has a certain number of lugs corre-
sponding in position to those which the blades are to occupy, the blades being
Drinn CJ1

page_text: secured to the lugs by means of screw bolts, so that they can be readily removed
-and replaced when necessary. The outer ends of the blades are by preference a
short distance from the inner-surface of the trough or tube, so that they revolve
therein without friction, thus requiring comparatively little-power_to_work the
apparatus even when of considerable-length. The trough or tube may have side
openings-at intervals of its length, provided-with slides and communicating with
shoots through which the cement-or-other-substance may be made to pass from
such point of the trough to any desired locality. Also, the trough or tube may be
formed with an angle or elbow at one or more points to convey the pulverulent
substance in any desired direction, or it may be formed with branches, the motion-
being communicated from the shaft in the one length of the trough to that or
those in the other or others by suitable toothed gearing or by a universal joint.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Robert Andrew Gibbons in the Great Seal Patent Office on the
5th January 1880.
ROBERT ANDREW GIBBONS, of Northfleet, in the County of Kent. " IMPROVE
APPARATUS FOR CONVEYING CEMENT OR OTHER PULVERULENT OR
GRANULAR SUBSTANCES FROM ONE LOCALITY TO ANOTHER."
MENTS IN
Pulverulent and granular substances have frequently been conveyed horizontally
from one locality to another through tubes or channels in which an archimedean
screw was made to revolve, the pulverulent body being propelled along the tube by
the action of the screw. It has been found however that such apparatus is not
applicable for conveying dense pulverulent substances such as cement, coal dust
or slack, and the like, because these tend to cake together and thus clog the
screw.
According to my present Invention I employ for the above purpose a trough,
tube, or channel, in which is a longitudinal shaft supported in bearings at
intervals, and having fixed thereon a number of radial arms or blades at
short distances apart in a longitudinal direction, and at equal distances apart
round the circumference, the arms or blades being so formed with inclined or
oblique surfaces, that as they revolve with the shaft the one blade moves the
cement or other pulverulent material lying in its path into the path of the next
one, which in its turn conveys it into the path of the next following one, and so on,
the material being thus gradually conveyed step by step from the one end of the
trough to the other. By preference I construct the blades or arms separate from
the shaft, and I fix upon the latter a series of bosses, each of which has a certain
number of lugs corresponding in position to those which the blades are to occupy,
the blades being secured to the lugs by means of screw bolts so that they can be
readily removed and replaced when necessary. The outer ends of the blades are by
preference a short distance from the inner surface of the trough or tube so that
they revolve therein without friction, thus requiring comparatively little power to
work the apparatus even when of considerable length. The trough or tube may
have side openings at intervals of its length provided with slides, and communi-
cating with shoots through which the cement or other substance may be made to
pass from such point of the trough to any desired locality. Also, the trough or
tube may be formed with an angle or elbow at one or more points to convey the
pulverulent substance in any desired direction, or it may be formed with branches,
the motion being communicated from the shaft in the one length of the trough to
that or those in the other or others by suitable toothed gearing or by a universal
joint.
DESCRIPTION OF THE DRAWINGS.
The accompanying Drawings show the construction and arrangement of my
before described improved apparatus which I prefer to employ. Fig. 1 shews a
plan; Fig. 2 shews a cross section at X, X; and Fig. 3, a cross section at Y, Y.
A is a trough of semicircular transverse section, along which the coment or other
material is to be conveyed. Along this is laid a shaft B running in bearings C,
arranged at suitable distances apart, and upon this shaft are fixed a number of
bosses D having lugs D³, to which are secured the screw blades E by screws or
otherwise. There are three lugs with their blades on each of the bosses arranged
at equal distances apart round the latter, and each lug with its blade being some-
what in advance of the preceding one in a longitudinal direction, so that as the
shaft with the blades revolves in the direction of the arrow, Figs. 2 and 3, the
blade a will push forward the cement or other substance lying in its path into the
nath of the next blade b. which in its turn will nush the cement forward into

page_text: the path of the blade c, and so on, thereby causing the cement or other substance
to travel along the trough in the direction of the arrow, Fig. 1.
By constructing the screw blades separate from their bosses and securing them
to lugs by screws, as shown, any blade becoming defective can be readily removed
and replaced by a new one,
be adjusted to approach the sand by slotting the bolt holes somewhat they may
of the trough as near as may be desired.
Having thus described the nature of my Invention, and in what manner the
same is to be performed, I claim,--
First. The use for conveying cement or other pulverulent or granular substances
from one locality to another of a series of arms or blades, with inclined or oblique
surfaces, arranged round a longitudinal shaft in a trough or-tube so that by the-
rotation of the shaft and blades or arms these are caused to move forward, the
said substance lying in their paths into the path of the next one, substantially as
herein described.
Second. In apparatus operating as set forth in the preceding claim, the combi-
nation of the blades or arms E secured to lugs D' on the bosses D with the shaft B
and trough, arranged and operating substantially as herein described with reference
to the accompanying Drawings.
In witness whereof, I, the said Robert Andrew Gibbons, have hereunto set
my hand and seal, this Fourth day of January, in the year of our Lord One
thousand eight hundred and eighty.