Improvements in Machines for Sanding Brick Molds.
Year: 1892

page_text: Date of Application, 8th Mar., 1892-Accepted, 9th July, 1892
COMPLETE SPECIFICATION.
Improvements in Machines for Sanding Brick Molds.
1, CHARLES ANDREW ADAMS, of Canton, in the County of Baltimore and State
of Maryland, United States of America, Superintendent of Brick Works, 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:-
In the description of the said invention which follows, reference is made to the
accompanying drawings forming a part hereof and in which:
Figures 1 and 2 are views of the machines as seen from opposite sides, and
Fig. 3 a plan of the invention.
Referring to the drawings, A is the frame of the machine and B B are
horizontally placed timbers elevated some considerable distance from the ground
and secured to the frame A.
CC are track rails fastened to the upper surfaces of the timbers, B.
D is a carriage having truck wheels a, which rest on the track rails C, and is
adapted to be moved longitudinally of the said rails by means of devices herein-
after described.
EE are supporting timbers for the brick molds which are denoted by F, and
they are situated slightly above the carriage and spread laterally so as to be
exteriorly of it when seen from the top as in Fig. 3.
The molds to be sanded are placed one above the other with the lowest one
resting on the supporting timbers E, as shown in Figs. 1 and 2.
The devices for moving the carriage, and with it the lowest mold which is with-
drawn from under the others, consists as follows:
G is a driving shaft the outer end of which is supported by an independent part
of the frame, H, shown only in Fig. 2. The inner end of the shaft G rests in a
box (not shown) attached to a part of the frame proper and to it is keyed a pinion 1.
This pinion which is shown in Fig. 2, is in engagement with a gear wheel J, on one
end of a shaft b, which extends entirely across the machine and is supported in
bearing boxes, c, on the frame A, see particularly Fig. 3.
On the other end of this shaft b, is a disk d, to which is fastened by means of
bolts e, the slotted arm, carrying a roller g at its longer end.
The bolts e pass through the slot h, of the arm
consequently the distance of
the roller from the centre of the shaft may be altered at pleasure.
K is a lever fulcrumed at to a block k, adapted under certain circumstances
hereinafter described, to slide longitudinally of a slotted guide m, supported by the
frame A of the machine, see Figs. 1 and 3.
The upper end of the lever K, against which the roller strikes in the revolution
is shod
of the shaft b, and its disk d, in the direction indicated by the curved arrow,
with iron, and thrown back in order to admit of the return movement of the said
lever as hereinafter described.
The lower end of the lever K, is connected by a rod o, to an arm L, on a shaft n,
which extends entirely across the machine.
To this shaft are keyed two arms M, which are attached to the carriage D, by
links p.
The return movement of the lever K, is effected by means of a chain which
7:
connects the stationary pin of the roller g to an arm N keyed to the shaft n.
From the foregoing description it will be seen that the carriage D, has a
reciprocating movement, and as it is provided with weighted pawls a, at each forward
movement it passes under the stacked molds, and the pawls pass behind the lowest
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page_text: one. In the backward movement of the carriage the lower mold is drawn from
under the others and carried along the timbers and left to be sanded, as hereinafter
described.
The said mold ist, finally brought to the inner end of the timbers E, and thence
to a shelf hereinafter described, and from this position it is elevated so as to occupy
the position shown to the right in Fig. 1, and to the left in Fig. 2.
The means for elevating the mold are as follows: Referring to Fig. 2, one of
the spokes of the gear J, has a pin t, on which is a roller O. P is a bar connected
by means of a pin, at the lower end of an arm Q on the shaft R.
On this shaft are also two arms S, having their upper ends loosely attached to
the lower ends of the rods T, which are bolted to the uprights.
These uprights are connected at the top by means of a shelf and are adapted
to slide in staples U, projecting from the frame A.
As the roller.O descends, it strikes the upper end of the bar P which is shod
with a curved plate a¹. In this operation the uprights with the shelf are
forced up.
To avoid injury to the machine in case of any obstruction to the operation of the
uprights, the bar P is provided with a chain 6ª, which passes over the shaft R
and is fitted with a weight c', which normally rests on the ground as shown in
Fig. 2.
Should the upward motion of the uprights be impeded, the bar P instead of
being forced down is pushed outward, and the weight is lifted. This allows the
roller to pass the plate a¹ without moving the uprights. As soon as the
obstruction is removed the parts again assume their original position.
To prevent the breaking of any attachments of the carriage D in case it becomes
jammed, the block to which the lever K is pivoted, is fitted with a rod, d', to one
end of which a chain el is fastened. This chain is wrapped around a sheave, V.,
and carried to the short arm of a weighted lever, W.
Should the movement of the carriage be prevented, the block & is forced back,
carrying with. it the lever K, and the roller y passes it without effecting its
vibration.
XX are bars leading from a cross piece f, which is.elevated above the carriage,
a distance equal to the height of a mold, to the forward part of the frame.
The operation of the machine is as follows:-
A number of molds are placed one upon another on the timbers, above the
carriage D, as shown in the drawing. When the machine is set in motion the first
operation consists in the moving backward the carriage which carries with it the
lowest one of the tier of molds. This mold is left by the carriage as it returns for
another, in the position of the mold marked 1 in Fig. 3. In the next operation or
movement of the carriage, another mold is carried to the said position, and the
first mold is by the second one pushed into the place of the mold marked 2 in
Fig. 3. The two molds within the frame are now filled with sand.
The next operation of the carriage is to carry a third mold from the bottom of
the tier to the position 1, when the first mold is pushed under the cross piece fto
the position.3, which is on the shelf w. The sand which projects above its edgenis
struck off by the lower edge of the said cross piece.
During the operations described, the uprights e with their shelf, e, have been
subjected to a vertical reciprocating motion but so far an inoperative one.in view
of there being no.molds fed to said shelf. But as the first mold is pushed on the
shelf by the following molds, it is lifted to the height shown by the isolated mold,
when it is grasped by the attendant and turned over or inverted on the bars X. 'In
this operation the contained sand falls to the other molds underneath.
Enough sand has adhered to the inner surfaces of the mold to prevent the
sticking of the clay, and the prepared mold is transferred to the brick making
machine.
It will be understood that the operation of the machine is.a continuous.one, and
that the sand is used over and over until exhausted when a fresh supply is added.

page_text: Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
1. In a machine for sanding brick molds, a frame upon which are stacked the
molds to be sanded, combined with a sliding carriage adapted to pass under the
stacked molds and withdraw the lowest one of the tier, substantially as specified.
2. In a machine for sanding brick molds, a frame upon which are stacked the
molds to be sanded, combined with a sliding carriage having pawls which are
operative only in one movement of the carriage, adapted to pass under the tier of
molds and withdraw the lowest one, substantially as specified.
3. In a machine for sanding brick molds, a frame upon which are stacked the
molds to be sanded, combined with a sliding carriage and a cross piece under which
the molds are carried, to strike off any surplus sand which may project above the
upper edge of the mold, substantially as specified.
4. In a machine for sanding brick molds, a frame upon which may be stacked
the molds to be sanded, combined with a carriage adapted to pass under the stacked
molds and withdraw from the same the lowest one, and devices substantially as
described to elevate the molds after they have traversed the frame, substantially
as specified.
5. In a machine for sanding brick molds, a frame upon which may be stacked
the molds to be sanded, combined with a sliding carriage adapted to pass under the
stacked molds and withdraw from the stack the lowest one, and cross bars upon
which the molds may be inverted to empty the contained sand and transfer it to
another mold underneath, substantially as specified.
6. In a machine for sanding brick molds, a sliding carriage for the purpose
described, a rotary shaft carrying an arm fitted with a roller, a series of vibratory
arms connected to the said carriage, and a lever actuated from the said rotative
roller fulcrumed to a yielding block whereby in case of the said carriage becoming
jammed the said block will be moved and the operation of the said lever be
completed without any movement of the carriage, substantially as specified.
7. In a machine for sanding brick molds, a sliding carriage adapted to withdraw
the lowest of a stack of molds, combined with an actuating lever pivoted or
fulcrumed to a yielding point which offers resistance to movement, whereby in casc
any extraordinary strain is placed upon the said lever the fulcrum will be moved,
substantially as and for the purpose specified.
8. In a machine for sanding brick molds, vertically moving uprights and a
connecting shelf to which the molds are fed, combined with a longitudinally moving
bar and a series of arms connected therewith and with the vertically moving
uprights, the said bar being held yieldingly in its position by means of a weight in
order that in case the said vertically moving uprights become jamined, the said bar
will be rendered inoperative to give motion to the same, substantially as specified.
Dated this 8th day of March 1892.
F. W. BARKER,
Applicant's Agent.