Improvements in Feeding Devices for Roller Mills.
Year: 1891

page_text: Date of Application, 16th Dec., 1891-Accepted, 30th Jan., 1892
COMPLETE SPECIFICATION.
Improvements in Feeding Devices for Roller Mills.
We, JUAN SCHMID and JACOBUS WEYERMANN of the firm of Schmid &
Weyermann of Barcelona in the Kingdom of Spain, Manufacturers do hereby
declare the nature of this invention and in what manner the same is to be
performed to be particularly described and ascertained in and by the following
statement
This invention relates to hoppers for feeding the materials to be crushed or com-
pressed by or between the cylinders of cylinder mills, and it consists in the following
improvements therein.
1st. In providing the hopper with an inclined floor the uppermost part of which
rests upon rods and the lower part upon excentrics which give to the floor the
vibratory movement necessary for obtaining a good distribution of the materials to
be fed to the cylinders, the rods also oscillating.
2nd. In providing the hopper with a shaft with excentrics or with a shaft of
excentric cross section, by the revolving of which the aforesaid hopper is
oscillated.
3rd. In providing the aforesaid floor along the edge over which the materials
fall off, with a band or piece less inclined than the general incline of the floor, and
of comparatively narrow width to lessen the velocity of the material leaving the
floor.
4th. In providing the hopper with a suspended plate for regulating the outflow
of material, this plate being carried on a horizontal shaft which is provided with a
pinion gearing in a toothed segment at the extremity of a lever balanced by a
counterweight, so that the counterweight causes the plate to close automatically
and prevent irregular leaving of the material from the inclined floor.
The accompanying drawing shows the apparatus consisting of a double hopper
with the above improvements.
Fig. 1 shows the said hopper with one half in section and the other half in side
elevation.
Fig. 2 is a vertical section and Fig. 3 a horizontal section of half of the hopper,
the remainder being symmetrical with the half illustrated, is not shown.
The apparatus shown in the drawings is designed to feed two sets of cylinders.
The casing G is divided by the partition C into two parts the latter having the
metal plate Cat its lower end to project into the tray A² to prevent the material
falling out over the back of the tray. This tray is inclined so that the material
slides on the tray under the action of its own weight and the oscillation of the
tray.
To obtain this movement the tray A² carries at each end a bearing D' to
receive the wrist pin D of the upper block D³ of the rod D'. The latter carries at
its lower end the block D' turning on the pin D* of the bearing D. The rods D' of
both the distributing floors are placed on the same pin D³, one of the rods being
bent to obtain space on the pin. The lower part of the inclined floor A² rests on
the excentric shaft E the revolving of which lifts and lowers the lower edge of the
floor A while its upper end moves back and forth slightly revolving on the pin D'
as a centre. The resultant of these two movements causes the grain or other
material to move over the floor A2 with great regularity.
The aforesaid piece or part of less inclination than the body of the floor A* m
be arranged by nailing a strip A' along the lower edge of the floor A².
.
To regulate the amount of material falling from the floor A², the plate F
suspended from the cross shaft F is arranged to rock on this shaft as a centre and
so fall with its lower edge vertically upon or towards the floor A³ near its lower

page_text: edge. The pinion F³ which gears with the toothed segment F is placed on one end
of the shaft F. The segment F is formed at the end of the arm or lever F' fixed
on the shaft F5 which carries the projecting arm or rod F with the counterweight F.
This weight tends to keep the plate against the floor A2 and so controls the
outflow of the material according to the position given to the weight. The part
spoken of as the pinion F³ may be only a toothed segment enclosed with the
segment as shown. Glass. panelled doors G' may be arranged opposite each
distributor for allowing the fall of the material to be observed.
The excentric shaft E may be revolved by gearing on the loose pulley H' by
means of the clutch I moved by the lever J when the shaft is to be revolved and
drawing back the clutch when the pulley is to continue to revolve without com-
municating movement to the shaft.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what
we claim is :-
In a hopper for feeding cylinder mills
1) An inclined floor or distributor the upper end of which rests upon pivoted rod
and the lower end upon an excentric shaft or upon excentrics by the revolution
of which an oscillating movement is given to the floor as set forth.
2) An excentric shaft in combination with a distributing floor whereby the latter
is caused to oscillate in the manner necessary to ensure feed of the material.
3) The combination of an inclined floor with a strip or band at the lower edge
thereof of less inclination than that of the floor for the purpose set forth.
4) The combination with an inclined floor of a plate suspended by a horizontal
shaft having a pinion engaging with a toothed segment on a lever balanced by a
counterweight whereby the adjustment of the counterweight causes regulation of
the outflow of material from said floor substantially as set forth.
Dated this 16th day of December 1891.
HERBERT & Co.,
18, Buckingham Street, Strand, London, W.C., Agents to Applicants.