close

Вход

Забыли?

вход по аккаунту

?

Патент USA US2108457

код для вставки
Fe. 15, 193.
v, TQBIA
2,398,457
APPARATUS FOR AUTOMATICALLY FEEDING METAL PIGS
Filed Dec. 4, 1935
8 Sheets-‘Sheet 1
v. TOBIA
, 108,457
APPARATUS FOR AUTOMATICALLY vFEEDING METAL 'PEEGS
Filed Dec. 4, 1935
'
8 Sheets-Sheet 2
1:4
60 J5. J9
2a:
J6
F?b
I
if?
lg3o
'
_
V_ TOBlA ‘
,
APPARATUS FOR‘ AUTOMATICALLY FEEDING METAL PIGS
Filed Dec. 4, 1935
16
i
l
2,108,457
-Q/M IHIII
'
I
Q
:
8 Sheets-Sheet‘ 3
—21
Q»
am
@7 WWMDQQWWL» mm
W
Feb. R, E93.
v. TOBIA
2»1@»457
APPARATUS FOR’ AUTOMATICALLY FEEDING METAL PIGS
Filed Dec. 4, 1935
j,
. a
'
(3,9
8 Sheets-Sheet 4
Feb. 15, W38.
v. TOBIA
2, 110%,457
APPARATUS FOR AUTOMATICALLY FEEDING METAL FIGS
Filed Dec. 4, 1955
%\
8 Sheets-Sheet
Fe. 1, 393.
I
v. TOBIA
2, WAS?
APPARATUS FOR AUTOMATICALLY FEEDING METAL PIGS
Fiied Dec. 4, 1955 »
‘I’
6’
‘
W7
w
a’
3%’
100
"
xwmgmz
.
9 97
a Sheets-Sheet e
w 59,13
9% §2 37
N
‘
'
I , - “t3
avv
_
v
66
E9
72
74
70,-;
49
' i
‘ Feb. 1, 193.
‘v. TOBHA
52,10,457
APPARATUS FOR AUTOMATICALLY FEEDING METAL PIGS
Filed Dec. 4, 1955
8 Sheets-Sheet 7
_____ga
igyzz
164
/
215
1/99 6% J93 1575 j"!
I N VE N TOR
Vmcem‘ 760/61
II T TORNE Y5
Feb. 15, was,
- v, TOBIA
2,308,457
APPARATUS FOR AUTOMATICALLY FEEDING METAL PIGS
Filed Dec. 4, 1935
/27
1%?‘
1232
8 Sheets-Sheet 8
Patented Feb. 15, 1938
2,1t8,457
UNITED’ STATES PATENT OFFICE
2,108,457
APPARATUS FOR AUTOMATICALLY FEED
ING METAL PIGS
Vincent Tobia, Chandlers Ford, England, assign
or to Pirelli-General Cable Works Limited,
London, England, a British Company
Application December 4, 1935, Serial No. 52,795
In Great Britain December 8, 1934
16 Claims. (Cl. 198-35)
The present invention relates to apparatus ‘for as to rotate together. In this casethere is pro
automatically feeding metal pigs to a melting pot vided a number of cradles each serving to lift a
layer of pigs and constituted by two ‘members,
and is particularly, although not necessarily ex
clusively, applicable for feeding lead or lead alloy one on each of the chains, and pivoted thereto
5_ pigs to the melting pot of an extrusion machine.
It is customary to store the pigs in groups com
prising layers, each containing the same number
so as to- be capable of swinging toward or away
from each other for the purpose of engaging or
releasing a layer of pigs. In an alternative con
of pigs, but those in each layer being disposed
at right angles to those in the layers immediately
struction, there is a single cradle only arranged
to travel upwardly with a single layer of pigs, to
10 above and below.
In the case of lead or lead
deposit them on to the delivery device and then 10
alloy pigs, it is common to store them in groups
to return by the same path fora second layer.
of twenty-?ve, comprising ?ve layers of live pigs >
In either of the above constructions, since, as
above mentioned, the pigs in each layer extend
in a direction at right angles to those in the
layers above and below, it is necessary that, after 15
each layer has been lifted by the elevator, the
group of pigs shall be rotated through a right
angle about the vertical axis in order that, when
the time comes for lifting the next layer, the
pigs therein shall extend in the correct direction 20
for engagement by the cradle. Accordingly,
mechanism, automatically operated in sequence
with the conveyor and elevator, is provided for
periodically rotating the table which, for the time
being, ‘is in position for co-operation with the ele 25.
each. It is, however, desirable to feed the pigs
into the melting pot one at a time at regular
15, intervals, the chief advantages accruing being
that the variation in temperature of the molten
metal in the pot due to the introduction of the
solid pigs is minimized, and this is also the case
in respect of the level of the molten metal, with
2O the result that the sides of the melting pot are
not subjected to the action of the dross, which
forms on the surface of the molten metal and
which becomes attached to the walls of the pot
at, that surface, to the same degree as is the case
2 if there be considerable variation in level. A
further advantage lies in the fact that, when
using alloys, the maintenance of the correct pro
portion of the constituents in- the melting pot is
vator.
"In, order that the invention may be clearly'
understood and readily carried into‘ effect, it will
facilitated if the pigs are fed in at a uniform rate
now be described more fully with reference to
with the resultant minimization of temperature
variation. The present invention has for its
main object to facilitate the handling of the pigs
in groups as above described and theirfeeding
into the melting pot one by one at regular inter
wherein:
Figure l is a side elevation of one form of ap
vals.
4
The invention consists in apparatus comprising
a travelling belt or like conveyor on which the
groups of pigs may be placed and a co-operating
elevator having one or more cradles adapted to
40 lift the pigs‘ one layer at a time and to deliver
them on to a delivery device, such as a chute or.
roller platform, provided with means for ,de
taining the pigs constituting the layer and re
leasing them one by one at regular intervals into
45 the melting pot. For the purpose of supporting
the groups of pigs, the travelling belt, arranged
so that its upper operative length is substantially
horizontal, is ?tted with a series of revoluble
tables, each of a size and shape suitable to re
50 ceive one group of pigs. The elevator with which
the travelling belt co~operates may be constituted
by two- chains passed over upper and lower pairs
of sprocket wheels, the rising and falling por
tions of the chains being substantially vertical
55, and the wheels ineach pair being connected so
the- accompanying drawings which illustrate two
forms of apparatus in accordance therewith and
paratus comprising conveyor and elevator units,
certain gear-wheels being shown in chain-dotted 35
lines only in order to avoid obscuring parts lying
behind them,
Figure 2 is a side view of the elevator unit to
an enlarged scale,
'
vFigure 3 is a section on the line A—A of Fig
ure 1‘ to the scale employed in Figure 2,
.Figure 4. is a partial section on the line A-A
ofFigure 1V to a still further enlarged scale,
.Figure 5 is a plan View of a detail on the line
B'—-B of Figure 4,
45
Figure 6 is a side elevation of a modi?ed form
of apparatus,
'
Figures '7 and._8 are respectively side view and
plan of certain details of the modi?ed apparatus
illustrated in Figure 6, but to a larger scale, cer 50
tain other features being omitted or shown chain
dotted'for the sake of clearness,
Figure 9 is an end elevation of a portion of the
elevator‘ unit shown in Figure 6 seen from the
right-hand, side,
55
2
2,108,457
Figure 10 is a similar view as seen from the
left-hand side.
Figures 11 and 12, together constituting a
single diagram, illustrate the electrical circuits
of the apparatus described with reference to
Figures 6 to 10.
Referring to Figures 1 to 5, the metal pigs I,
normally stacked in groups of ?ve layers, each
layer comprising ?ve pigs as shown, are sup
10 ported on a series of tables 2, each rotatable
about an axis at right angles to its surface. In
Figure 1 six of such tables are shown, but it is
to be understood that any number may be em
ployed and, in fact, in Figure 4 a further table is
15 shown in the inverted position which each table
occupies in succession in the manner described
below.
Each of the rotatable tables 2 is sup
ported by means of a ball race 3 from a non-ro
tatable frame 4, connected by means of lugs 5
20 with two endless conveyor chains 6 passed around
pairs of sprocket wheels ‘I and 8 located respec
tively at opposite ends of the apparatus, 50 that
the portions of the conveyor chain 6 lying be
tween them extend in substantially horizontal di
rections. The weight of the tables 2 and their
at opposite ends of each of the metal pigs I,
whereby, as clearly appears from Figure 3, each
cradle on its upward travel is adapted to lift a
layer of metal pigs. By mechanism described
below each pair of swinging members 22 is caused 10
to lift the layer of pigs I which, for the time
being, is uppermost in its group, to carry it over
the highest position to which the chain I8 travels
around the sprocket wheel 20 and then to begin
lowering the layer of metal pigs until the latter 15
come into contact with a delivery device consist
ing of an inclined platform comprising a series
of rollers 26 on which the pigs are deposited. In
order that, when the chains I9 pass over the up
pigs I which may be placed on the tables is taken
per portion of the sprocket 29 the cradles shall 20
remain in their depending position, each of the
pivots 23 is itself pivoted at 2 ‘I in such a direction
as to permit the corresponding member 22 to
swing in a plane parallel to that of either chain
I9. Thus the extensions 24 engaging the lugs 25 25
remain substantially horizontal and serve to sup
port the metal pigs I until the latter make con
by channel guides 9 and I0 extending respective
tact with and are borne by the rollers 26. After
ly over the length of the conveyor unit, and with
which rollers II, carried by the frames 4 and ex
tending laterally therefrom, are adapted to co
operate. The groups of metal pigs I are loaded
on to their respective tables 2 when each of the
thus discharging the metal pigs, the cradles
continue their downward motion until, having 30
passed around the lower sprocket wheel 2!, each
supporting frame 4 as Well as of the groups of
latter is near the right-hand end of the conveyor
unit, as seen in Figure 1: the tables are then
caused to travel to the left toward the elevator
unit under which each group of pigs remains
stationary for a su?icient period to allow the pigs
to be dealt with by the elevator unit in the man
40 ner described below.
In order to secure the necessary periodic mo
tion of the conveyor unit, the sprocket wheels 8
are driven from a continuously running shaft I2
which, as described below, also serves to drive the
. elevator; on the shaft I2 there is a pinion l3
meshing with a gear wheel I4 mounted on a
spindle I5. Fast on the spindle I5 there is also
a toothed segment I6 which gears with a toothed
wheel IT on the spindle I8 of the sprocket wheels
50
pivots being, as clearly seen in Figure 3, so lo
cated as to enable the members 22 to swing to
ward or away from each other. The members
22 are provided with inwardly directed extensions
24 adapted to engage underneath lugs 25 formed
8. Thus, although the spindle I2 revolves con
tinuously, the sprocket wheels 8 are rotated in
termittently, and the above-described gearing
is so designed that the period during which the
conveyor chain 6 is stationary occurs while one
. of the groups of metal pigs I is in its operative
position relatively to the elevator and is by this
means caused to remain there for a su?iciently
long period to allow of all the pigs being dealt
with by the elevator. The sprocket wheels 8 are
60 then rotated by the above-described gearing to
a su?icient degree to bring the group of pigs next
in succession into the operative position rela
tively to the elevator where it remains for a like
period and the sequence of operations is repeated.
The elevator unit comprises a pair of endless
65
chains I9 each encircling upper and lower sprock
et wheels 20, 2|. The lower sprocket wheels 2|
are mounted on the driving shaft I2 so that the
sprocket wheels and elevator chains are continu
70 ally in motion in such a direction that the right
hand portions of the chains, as seen in Figures
1 and 2, move in the upward direction. Attached
to the elevator chains I9 is a series of five cra
dles, each comprising two swinging members 22
75 respectively pivoted at 23 to the chains I9, the’
is again brought to the position in which it serves
to lift the layer of pigs which, for the time being,
is uppermost in the group which meanwhile has
been brought by the conveyor to the operative
position.
In order to effect this selection of the upper
most layer of pigs, each swinging member 22 is
?tted with an upwardly directed arm 28 having
a transverse bar 29 adapted, as the elevator 40
chains travel upwards, to engage at its opposite
ends one pair of a series of cam plates 30. As
seen in Figure 3, in proximity to its lower ex
tremity, each of these cam plates is so shaped
that, as the transverse bar 29 comes into contact
with the pair with which it co-operates, it is urged
inwardly so vas to cause the corresponding mem
ber 22 to rock in such a manner as to bring its
inwardly directed extension 24 clear of the metal
pigs. As, however, the cradle continues to ascend,
the bars 29 clear the upper edges of the corre
sponding cam plates 30 so that the members 22
swing inwardly and this action is arranged to
occur at such a moment that the extensions 24
are caused to engage beneath the lugs 25 of the
layer of pigs which, for the time being, is upper
most: obviously, this must take place at progres
sively lower positions as occupied by the succes
sive cradles in the series. Thus, in the apparatus
illustrated, there are ?ve cradles corresponding 60
to the number of layers of pigs I in each group,
and the cradle which, as shown in Figure 2, is
approximately at the middle of its ascent, has
functioned to lift the topmost layer in the group.
For this purpose, the members 22 must be sep
arated for a suiiicient length of their travel to
clear the metal pigs in the four lower layers and
the co-operating cam plates 38 are, accordingly,
of sui?cient length to prevent the release of these
members until the extensions 24 are opposite the 70
topmost layer of pigs. The action of the succeed
ing cradle, however, must be such as to clear only
the three lower layers of pigs and engage the
fourth which is now the uppermost layer. Ac
cordingly, the cam plates 38 adapted to co-oper 75
3
2,108,457
ate with the bars 29 of this cradle must be corre
41 pivoted at 48. The opposite end of the lever
spondingly shorter: similarly, those which co .4‘! is provided with a cam roller 49 adapted to
operate with succeeding cradles must be made co-operate with a cam 55 on the shaft l2. The
correspondingly shorter still. ‘This construction
design and timing of the cam 50 are such that
is ‘clearly illustrated in Figure 2, from which it
immediately a layer of pigs has been lifted from
the group under the elevator, the plunger 45 is
withdrawn from engagement with one of the
will also be seen that the bars 29 vary correspond
‘ ingly in length, the barson the members 22 con
stituting the ?rst cradle being made sufficiently
long to co-operate with the longest‘ pairs of c'am
10 plates which are located respectively at the out
side of each series. The next'shorter pairs of
cam plates 3|] are located immediately within the
longest pairs and correspondingly the bars 29
son the members 22 of the next succeeding cradle
15 are shortened so as to engage with these pairs of
cam plates 30. Similarly the cam plates 30 con
tion so that it'is encounteredtby the next suc
ceeding projection 44, whereupon the rotation of
15
the disc 3| and consequently of the group of
crease in length‘ and in distance apart and the
pigs in the operative position is arrested, the
layer of pigs which is now uppermost being
then in correct position for engagement with the 20
bars 29 adapted respectively to co-operate with
For the purpose of rotating the group of pigs
in operative position under the elevator, through
a right angle'after each layer of pigs has been
25 lifted, there is provided a turntable occupying
such a position that it is immediately under
neath the rotatable table 2 bearing the group of
pigs being operated on by the elevator. This
turntable and each of the tables 2 are provided
30 with mutually acting engagement mechanism:
the turntable comprises a disc 3|, Figures 4 and 5,
cradle operating next in sequence: Figures 1 and
2 are drawn to depict this action as having al
ready taken place.
7
>
After the lowest layer of pigs in a group has
been lifted, obviously time must be allowed for 25
bringing the neXt succeeding group beneath the
elevator: for this reason, as seen in Figures 1
on which there are two dogs 32 separated by a
parallel-sided space 33. As the tables 2 are
and 2, the cradles are not equispaced along the
elevator chains, the space between the cradle
adapted to lift the lowest layer and that operating 30
on the topmost layer being longer than those
between the remaining cradles.
Since-the roller platform 26, on to which the
drawn forward by the conveyor, chains 6, the
pigs are delivered layer by layer, is inclined, the
35 disc 3| is in the position shown in Figures 4 and
5, that is to say, the parallel-sided space 33 lies
in the direction of travel so that a squared pro
jection 34 from the underneath of the rotatable
table 2 which is about to be brought beneath the
elevator may enter the space 33, and correspond
ingly the way is clear for the table which has
been emptied by the elevator to proceed on its
pigs in each layer roll down it so as to make 35
way for delivery of those constituting the next
layer. For reasons above mentioned, however,
it is desirable that the pigs should be delivered
to the melting pot one at a time, and for this
purpose, there is provided a detaining and re
leasing device, comprising a detent 5| pivoted at 40
the dogs 32, so that, on the disc 3| being rotated,
the table 2 is rotated with it. For the purpose
52 and adapted to be rocked by means of a con
necting rod 53 from a crank disc 54. This disc
is ?tted on a spindle 55 driven by chain gearing
56 from the spindle 51 on which the sprocket
wheels 20 are mounted. The detent 5| is formed 45
with two arms 58 and 59 and the arrangement
of rotating the disc3| and dogs 32, there is pro
is such that, on the detent being rocked, these
course.v As indicated, particularly in Figure 5,
each of the squared projections 34 is of such a
width as to engage the parallel inner faces of
vided a continuously revolving shaft 35 driven
arms project alternately above the level of the
in any suitable manner such, for example, as by
rollers 26. For instance, in Figure 2, it will be
means of bevel gearing from the shaft l2.‘ On
seen that the arm 58 is so projecting and is con
the shaft 35 there is a worm 35 meshing with a
sequently preventing the pigs from sliding oi?
the roller platform 23. On further rotation of
the crank disc 54, however, the arm 58 will be de
pressed below the level of this platform, but
worm wheel 31 ?tted with an upwardly project
ing stud 38 adapted to engage a projection 39
, on a band 40 comprising one element of a fric
tion drive. The other element comprises a drum
Ill and between the band 40 and drum 4| there
is interposed a suitable friction lining 42. The
disc 3| and drum 4| are ?xed'on a spindle 43,
60 on which the worm wheel 31 is loosely mounted;
thus the disc 3| is continuously rotated from the‘
shaft 35 through the worm gearing and friction
drive, unless it is forcibly prevented from' doing
so, in which case ‘the friction drive allows for
,
disc 3| ‘and with it the table 2 and its layer
ofpigs which is in the operative position. Be
fore, however, rotation through a right angle has 10
been completed, the cam 50 has operated to allow
restoration, by such means as a spring not shown,
of the plunger 45 to or toward its original posi
stituting the succeeding pairs progressively de
20 them are correspondingly of progressively de
creased length as shown in Figure 2.
'
40
projections 44, thus permitting rotation of the
slipping.
Obviously, as soon as a layer of pigs has been
lifted by one of the cradles, the group of pigs
50
previously to this action the arm 59 has risen so 55
that the foremost pig only is free to slide off
the platform, the remainder being detained by
the arm 59. Continued rotation of the crank
discv 55 results in depression of ‘the arm 59 and’
elevation of the arm 58, when the remaining
pigs slide down the roller platform 26, but are
arrested by the arm '58, which has been elevated.
The, sequence of operations is then repeated so
that the pigs are released one by one. On
leaving‘the roller platform '25, each pig runs on 65
to a. second roller platform 60 extending at right
angles to the roller platform 26, whence it is
should be rotated through a right angle and then
held stationary until the next layer has been delivered to the melting pot.
'
'
lifted by the succeeding cradle. For the purpose
The apparatus illustrated in Figures 6 to 10 is
of thus allowing rotation and then arresting the of the same ‘general type as that above described, 70
group of pigs, the disc 3| is provided with a series comprising, namely a conveyor unit adapted to
of projections 44 adapted to be engaged in turn co-operate with an elevator unit by which the
by a plunger 45 mounted so that it can oscillate pigs are delivered‘to a delivery device adapted to
in‘a ‘stationary guide 46 and jointed'to a lever' feed them to the melting pot one at a time. ' As
75
4
2,108,457
in the previous case, the metal pigs l are mount
ed on a series of tables 2 connected with an end
less conveyor chain 6 passing around sprocket
wheels ‘I and 8. The elevator, however, although
of the type comprising an endless chain passing
around upper and lower sprocket wheels 20 and
2|, does not operate continuously in the same di
rection, nor is it provided with a series of cradles.
Instead thereof there is a single cradle unit which
is caused to travel upwardly and, having reached
its highest point as determined by the upper
sprocket wheel 26, to move downwardly so as to
deposit its load of pigs on to the roller platform
or like delivery device 26 and then to return by
15 the same path for a further layer of pigs. The
conveyor and elevator are respectively driven by
separate electric motors 6|, 62, each operating
through suitable gearing, while a third electric
motor 63 serves to actuate the turntable mecha
nism. Obviously, none of these motors is re
quired to run continuously in the same direction
and they are automatically controlled both manu
ally by “start” and “stop” press buttons and auto
matically by the various movements of the ap
25 paratus in the manner described below. Indica
tions are given on the drawings of the various
switches actuated by the apparatus during the
matically to reclose itself, but not until the motor
circuit has been interrupted by another switch,
the action of which is described below.
As above mentioned, the elevator is provided
with a single cradle only. This comprises a pair
of swinging members 66, seen most clearly in
Figures 9 and 10, having inwardly directed pro
jections 67 adapted to lift the uppermost layer
of pigs in a manner similar to that existing in
the previously described apparatus. The mem 10
bers 66 are pivoted at 66 to a cross beam 69
adapted to slide in vertical guides 10. In Figure
9 the cradle is depicted in full lines as travelling
in the downward direction and in chain-dotted
lines as having engaged the uppermost layer of 15
pigs and about to commence its upward travel.
Obviously, the lowest point to be reached by the
cradle must be determined by the height of the
particular layer of pigs which, for the time being,
is uppermost; that is to say, if a group of pigs 20
has just been introduced beneath the elevator, the
downward travel of the cradle must be a minimum
in order that it shall engage and lift only the
topmost layer of pigs.
On its next journey, how
ever, it must reach a lower point in order to en
course of its operation, but it is to be understood
positions.
that, generally speaking, such representations are
In order to determine the point of reversal, the
cross beam 69 is provided with a plunger ll,
which, on the downward travel of the cradle,
comes into contact with the upper surfaces of
30 of a diagrammatic nature and are not intended to
afford any indication of the actual construction
of switches employed.
In the apparatus now under consideration, six
tables are employed, as indicated in Figure 6, the
loading position for each of these being, as in
25
gage the second layer and, on subsequent
journeys, it must travel to successively lower
the pigs in the uppermost layer for the time being.
Motion of this plunger is, therefore, arrested, but,
as the cross beam 69 continues to travel down
35
the previously described apparatus, toward the
wardly, the plunger slides through it.
right-hand end of the machine as seen in Figure
6. In order to load each table, it is necessary
that the conveyor should be stopped with the
er is provided with upper and lower collars 12
and 13: these collars co-operate with one arm
of a bell-crank lever 14 pivoted at 15 to a bracket
carried by the cross beam. 69. The other arm of 40
the bell-crank lever 14 is jointed to a plunger 16
mounted in a guide 11 on the cross beam 69 so
as to be capable of motion in the horizontal
direction, and it will be seen that, on arrest of
the plunger 'H by contact with the uppermost 45
40 table in its appropriate position, and for this pur
pose there is provided a switch A adapted, as the
conveyor chain 6 travels in such a direction as
to bring the tables toward the elevator, to be
actuated by means of one of a series of buttons,
45 rollers or the like 64. These are carried by the
The plung
chain 6 in such positions relatively to the vari
layer of pigs, such horizontal motion of the plung
ous tables as to actuate the switch A successively
when the various tables arrive at the loading posi
tion. Due to such actuation, the circuit of the
er toward the left, as seen in Figure 9, will occur.
motor 6|, which has hitherto been running in
order to drive the conveyor, is. broken and the
conveyor therefore stops. The construction of
the switch A is, however, such that after a few
seconds it again closes, but during that period the
' circuit of the motor 6| has been opened by the
control apparatus at another point, so that the
motor does not restart on the automatic closing
of the switch A. When, however, the loading
operation on to the particular table in the load
ing position has been completed, the “start” press
button of the apparatus is operated manually, re
sulting in the restarting of the motor 6! and the
travel forward of the conveyor until the next
following table has arrived at the loading posi
' tion, whereupon the conveyor is again stopped
automatically and the sequence of operations re
peated.
For the purpose of arresting the tables suc
cessively in the position in which the elevator
70 may operate on the groups of pigs thereon, a
switch B is provided. This is adapted to be suc
cessively actuated by a second series of buttons,
rollers or the like 65, suitably located along the
chain 6. The switch B also operates to inter
75 rupt the circuit of the motor 6| and then auto
When this takes place, the plunger is opposite
some portion of a swinging frame 18 which ex
tends vertically over a height approximately equal 50
to that of a complete group of pigs; the frame 18
is supported by pivoted links 19 and is spring
biassed in a direction opposite to the above mo
tion of the plunger 16.
The frame 18 co-operates
with a switch C which, on actuation, is effective 55
to reverse the motor 62 which drives the elevator.
This action occurs at the moment when the ex
tensions have engaged the layer of pigs upper
most for the time being and results in the down
ward motion of the cradle being stopped and its 60
upward motion with the layer of pigs commenc
mg.
The cradle rises to its highest position as deter
mined by the travel of the elevator chain over the
sprocket wheel 20, moves across to the opposite
side of the elevator in a manner similar to that
followed by the cradles in the previously described
apparatus, and then descends so that the pigs are
deposited on to the roller platform or like deliver-v
ing device 26, whence they reach the melting pot 70
one at a time by detaining and releasing mecha
nism similar to that previously described. The
depositing action is illustrated in Figure 10,
wherein in full lines the cradle is shown as ap
proaching the roller platform 26 and in dotted 75
5
2,108,457‘
lines as having depositedits layer of pigs thereon.
is not again ‘operated to restart the motor ‘63.
The downward‘motion of the cradle is," however,
allowed to continue somewhat and the swinging
Obviously, the action of the ramp I02 on the
switch D must be maintained for such a time as to
members 66 are thereby thrust apart owing to the
allow suf?cient'rotation of thedisc 95 to cause
5 fact ‘that diverging plates '80' ?tted thereto en
the lever 91 to be ejected from the notch in which 5
counter ?xed ramps 8!. .In this separating mo- , it has been resting. Rotation of the group of pigs
tiontrollers or studs 82 ?tted tothe backs of the through, a right angle corresponds to such a ro
swinging members 66 push back flaps 83 pivoted
at, Bit, and When'the rollers or studs 82 reach a
10 position beyond the bottom edge of the flaps '_.83,
‘
the lattersfall back into their normal position, so
that, when the elevator is reversed and the cradle
commences its upward'travel, the rollers or studs
82 bear on theyoutside of the flaps. 83,.‘thereby
' l5 maintaining the swinging members, (it in their
extended position. This action is, however,1main
tained only' overthe ?rst portion of ‘the upward
travel, since above the ?a'ps83 there are gaps 85
which, when reachedyby therollers‘or studs 82,
.20
tation of the disc 95 that the end‘of the lever
Bl’ drops into the succeeding notch 96 and oper
ates to stop the motor 63. “
"
-
‘
'
"
‘
10
After the table beneath the elevator has‘ been
emptied,‘ it, is, ‘of course, necessary to restart the
eonveyor, in order that the next table in, succes
sionrnaybe brought into co-operative relation
ship with the elevator. For this purpose a switch
H is "provided'actuated by a lever I03 carried by '
the ldisc 95. [As in'dicated'in Figure 8, between the
notch '96 correspondingto the lowest layer of pigs
and that corresponding to then-highest layer, the
perfnit’th‘e swinging members 66 ‘to fall inwardly angular distance is doublejthat between the re 20
to?their," normal ‘position. ,The object‘ of thus ‘maining ‘notches.
’
Thus, aftersthe lowest layer
keeping,,.'them separated until, on its return mo
has been removed, the turntable 181 revolves
tion,'the cradleisclear of the roller platform 26,
is to prevent the possibility ‘of its again lifting
the pigs which'have just been deposited ‘and have
through 180° in order that the elements of the ‘
engagement mechanism respectively on the von
coming ‘table 2 and the turntable ill-maybe in 25
failed to roll down the platform 26 owing to the their proper mutual engagement position. This
presence of. other pigs, lower down ‘the platform- or rotation of the turntable havingv been e?ected,
for any other cause. 'iReversal' of theelevato-r the lever Hi3 actuates the switch H, with the re
after the cradle has passed the roller platform sult that the motor 6|, is restarted and the con-.
>30 26 is effected by means ‘of a switch'sE, actuated by V‘veyor. travels forward until the button or roller 30
a'ramp 86 carried by the cross'beam‘ 69. ' _
7
It will be appreciatedthat, as in the previously
described apparatus, rotation through a right an-.
65 next in succession operates to open the switch ‘
B. This, of course, occurs when the next suc
ceedingptable 2 has been brought into co-opera
gle of the group of pigs in operative relationship ‘tive relationship with the elevator and the above- '
7 35 with theelevator is required ‘after the lifting of
each layer. This is effected by meansof a turn
table}? rotated from the electric motor 63 oper
ating‘through worm gearing 88, bevel gearing 89
and spur gearing 90, adapted to drive a spindle
.49 9! on which the turntable 8'llis mountedpthese
elements ,being‘clearly seen in Figures '7' and 8.
Each of the tables 2 and theturntable 8‘! are pro-'
described sequence of operations is then repeated. _
Asabove mentioned-the switch B recloses itself, '
but not until the lever I03 has rotated su?iciently
to allow the switch Hto reopen.
'
In order, after the last table has been emptied
and has passed from ‘beneath theelevator, to stop
the conveyor and theelevator, a'switch F is pro
vided. This affects the circuit ofboth the motors
6 land 62 so that these motors are stopped. The
vided' with engagement mechanism similar .to
that adopted, inrthe apparatus previously dee‘ switch F is actuated by a button, roller or the like
45 scribed anda description'thereof, in the present _ attached to the last of the series of tables 2 or to 45
agpoint on the conveyor chain 6 in' proximity
‘ instance, is therefore'unnecessary. The spindle
9| ‘of the. turntable .81‘ is further provided with a
spuri‘wheel 92 meshing with a gear wheel 93
mounted on a spindle 94 which also carries a disc
:50 95; having five notches 96 corresponding tothe
?ve'layers of pigs in each group, and spaced as
indicatedinFi'gure 8. C'o-operating‘ with these
notches is alever 91 ‘pivoted at 9B and having at
tached at its outer‘end a cord orchain 9v9spassed
, theret o';
Thus, after all the tables have been
emptied, the whole rapparatusis entirely discon
nected from the power circuit.
'
"
> Figures 11 and Y12 taken together constitute a 50
complete electrical ‘diagram of‘ the apparatus illus
trated in Figures 6 to 10, certain of the items of
that vapparatus being shown in Figures 11 and 12
and marked‘with corresponding references. For
5 over an idler wheel H10 and provided at‘its lower _ the sake'of'lavoiding undue complication of the
end with a ‘weight fill. The cord-io-r chain 99is diagram, however, certain features of ordinary
adapted to operate a~switch G in the circuit of construction which would necessarily be embodied
the motor 63, in such a manner that,'on rotation in the apparatus, for example, shunt windings of
of the disc 95 in a clockwise direction, which- is the motors, automatic starting rheostats, overload
60 that ‘imparted to it‘by the motor 63, when the end relays, are omitted, their methodof- connection in
of‘ the lever'il'l drops into one of the notches 96,. > the system being perfectly obvious to those'skilled
' the motor 63 is stopped. The period of stoppage, , in the art and constituting no feature'iof the pres;
of course, corresponds to‘that during which the
cradle of the elevator ‘is travelling downwardly
,‘65‘toward ‘the group ‘of pigs ‘and is engaging and
lifting the uppermost layer. ' After this action has
ent invention.
‘
V
7
60
>
The-elements whichcontrol the action of the
various items of electrical apparatus are assembled
on a board I21 indicated in Figure 12.
65
This board
is represented as provided along its right-hand
margin with ‘a series of terminals, to each of
occurred, rotation of the group of pigs is neces
sary and, accordingly} the motor‘ 1673 must be
started] ‘This’ is veffectedby a switch D actuated
70 by’a, ramp I02 carried by the cross beam 69. _The
which there is allocated a reference letter or nu
meral'. In orderto facilitate tracing‘ out the vari
construction of the mechanism acted upon by the
ous connections on the diagram, the same'refer
ramp lll2,,_howe,velr, is such‘that theswit'ch D is
operated only on the upward motion ofthe cradle
so ‘that, when, the ‘latter returns “after vdepositing
‘'75 its load-of pigs on the platform 2'6,th_e switch D
55
70
ence‘letters or numerals ‘are respectively attached
to various details of the apparatus which are di»
rectly'connected to the corresponding terminals
on the board I21. In order further to facilitate 75
"2,108,457
6
tracing connections, 'where‘n'ec'es'sary, from Fig
ure 11 to Figure 12, the electrical leads which,
owing to the necessity of employing two ?gures to
represent a single diagram, are broken, have
been marked correspondingly on these ?gures
with the references a, b, . . . w, at.
These mark
ings, however, do not constitute references in
the normal sense of the term and will not be men
tioned in the following description of the dia
gram.
The electrical supply to the apparatus is as
sumed to be direct current through a main
double-pole switch I28 which at all times when
the apparatus is in operation would be closed,
15 thus making the terminals I29 and I38 respec
tively permanently positive and negative. Fur
ther, owing to certain ?xed connections, certain
other points in the apparatus will always possess
a given polarity during the whole time that the
20 switch I28 is closed.
Thus the terminal W of
the “start” push button I3I is permanently posi
tive, being connected to terminal I29 by leads
I32, I33. Similarly the lead I34 connected to
lead I33 renders the contact I35 of the switch E
the conveyor motor so that the table is stopped
in positidn “Y”, and makes circuit from positive
at contact I38, switch B, lead I64, switch F, lead
I65, terminal I I4, lead I66, relay coil I61 to nega
tive at I44; switches I68, I69 and I18 are thus
closed. This completes circuit from positive at
contact I38, switch B, leads I64, I1I, terminal II5,
lead I12, switch I69, lead I13, arm of interlock
switch I14, contact I15, leads I16, I11, terminal
I23, lead I18, switch C, lead I19, terminal I22, 10
lead I88, elevator motor “down” contactor coil
I8I, leads I82, I83, I84, to negative at I44;
switches I85, I86, I81, I88 are thereby closed.
The circuit of the elevator motor is thus completed
from positive at terminal I29, leads I59, I89, I98,
switch I86, leads I9I, I92, terminal Y, lead I93.
?eld-winding I94 of motor 62, lead I95, terminal
Z, lead I96, switch I81, lead I91, terminal LE,
lead I98, armature of motor 62, lead I99, terminal
AE, lead 288, switch I88, leads 28I and 282, to 20
negative at terminal LT. The elevator is thus
started so that the cradle 66 travels in the down
ward direction in order to pick up the layer of
pigs which, for the time being, is uppermost. As
permanently positive, and, further, the contact
this occurs, the switch C is actuated by means of‘
I36 of the switch D and the contacts I31 and I38
of the switch B are rendered positive from lead
the plunger H as described with reference to
Figure 9. Accordingly, circuit is broken between
I34 via leads I39, I48, I4I, I42. Similarly, from
the negative terminal I38 via lead I43, the ter
minals LC and LT are permanently negative, and
this remark also applies to terminal I I I and point
I44 connected with terminal LT via leads I45, I46.
In the ensuing description, therefore, certain cir
the contacts I22 and I23 of the switch C and
made at contacts I28 and I2I. This operates to
cuits will be traced between these points as being
2 positive and negative respectively.
opposite direction is, however, completed by the
As above described, the ?rst action required is
from positive at terminal W, leads 283, 284, switch
I68, leads 285, 286, terminal I2I, lead 281, switch
25
the loading of the tables 2 with the groups of pigs
and for this purpose they must be successively
brought to and retained in position “X” immedi
40 ately above the switch A, this switch being there
by opened so that the conveyor motor 6| is
de-energize the elevator contactor coil I8 I, where
by the switches I85, I86, I81 and I88 are opened
and the motor 62 stopped.
Circuit whereby this motor is restarted in the
contacts I28 and I2I of switch C.
This circuit is
stopped. ’ Normally, however, the switch is closed
C (lower contacts) lead 288, terminal I 28, leads
289, 2I8, terminal II9, lead 2II, switch E, lead
2I2, terminal II8, lead 2I3, elevator motor “up" 40
contactor coil 2I4, leads 2I5,'I83, I84, to negative
at I44. This closes switches 2I6, 2I1, 2I8, 2I9,
and on pressing the “start” push button I3I, cir
cuit is established from positive at the terminal
228 and starts the elevator motor in the reverse
direction so that the cradle 66 is raised. For this
45 W of the push button, through the push button,
leads I41, I48, relay coil I49, to negative at I44.
This results in closing relay switch I58 and cir
cuit is then made from positive at contact I31 of
switch B, through the switch, lead I5I, terminal
50 II2, lead I52, switch I58, coil I53 of conveyor
motor contactor, lead I54, terminal II3, lead I55,
switch A, lead I56, to negative at terminal III.
This closes the holding-on switch I51 and the
main conveyor motor switch I58.
Circuit to the
55 conveyor motor is then established from positive
at terminal I29, via lead I59, switch I58, lead I68,
terminal AC, lead I6I, conveyor motor 6|, lead
I62 to negative at terminal LC. The conveyor
then operates to bring the ?rst table 2 to posi
60 tion “X” at which it opens the switch A, thus
stopping the conveyor. As explained above, how
ever, this switch is of such a construction that,
after a certain period, it automatically recloses it
self; hence, when the table 2, which is in the load
ing position, has been loaded, on again depressing
the “start” push button, the conveyor motor 6| is
started and the conveyor travels until the suc—
ceeding table 2 breaks circuit at the switch A,
this cycle of events being repeated for the loading
operation of each table.
On arrival of the table 2 in position “Y” in
which it is in co-operative relationship with the
elevator, the switch B breaks circuit between its
contacts H2 and I31 and makes circuit between
contacts I38 and I63. This breaks the circuit of
purpose circuit is completed from positive at ter~ 45
minal I29 leads I59, I89, switch 2I8, lead I92, ter
minal Y, lead I93, ?eld-winding I94 of elevator
motor 62, lead I95, terminal Z, lead I96, switch
2I9, lead 288, terminal AE, lead I99, armature of
elevator motor 62, lead I98, terminal LE, leads
I91, 22I, switch 228, lead 282, to negative at LT.
As the cradle 66 begins to ascend switch C breaks
circuit at contacts I28, I2I and remakes it at con
tacts I22, I23. The contactor coil 2I4 is not,hoW—
ever, thereby, de-energized, its circuit being main 55
tained through‘the holding-on switch 2I1, As‘
above described, the cradle 66 on passing the
switch D actuates it to start the turntable motor
63. The electrical circuits operative to this end
will be described below. As the elevator motor 60
continues to operate, the cradle actuates the
switch E to break circuit at contacts I I8, I I 9 and
to make it at I I1 and I35; thereby the circuit of
the contactor coil 2I4 is broken and the switches
which it controls opened, stopping the elevator
motor.
Completion of circuit at contacts H1 and I35
of switch E results in restarting the elevator mo
tor in the opposite direction, the circuit being
from positive at contact I35, through switch E, 70
lead 222, terminal II1, lead 223, reversing relay
coil 224, lead I84, to negative at I44. This closes
switches 225 and 226, establishing circuit from
positive at terminal W via lead 283, switch I18,
lead 221, switch 225, leads 228, I16, I11, terminal
2, 108,457
i123, lead I18,“switch ‘0, lead I19,‘-ternii'nal J22‘,
lead 180, contactor coil'I8I-, leads'l82, I83,JI84, to
negativei'at I46. :This closes the-main- switches
I86, I81 and I88 of the circuit'which, as above
explained,v causes theelevator motor to'be started
in such‘a direction that the cradle 66 travels
downwards and the sequence of: operations is'then
repeated.’ As soon ‘as the cradle 66 leaves the
switch E circuit is opened at Contacts I I1 and l35
and reclosed at H6, H9, ‘The circuit of coil IBI,
however, >. remains 5‘ closed - ‘through I holding-on
switch
15
I85.
'-
v
1
.,
-
a
'
‘switch, this‘ switch-being provided‘for the'pur
pose of ensuring vthat‘when theelevator isstarted
by‘the arrival of atablei 231', position-“Y” it shall
.25 travel in the appropriate5direction. 3 Thus, in ‘the
above description, it is Iassumedthat‘initial travel
layer of pigs was'required, ‘and,,ac‘cordinglyg'pra
in the d‘ownwardndirection in order‘ to take up a
, vious‘downward ‘travel; of the‘cradle would‘have
served to lock the interlock ‘switch ‘so ‘thatit‘s arm
‘I'M bore on contact‘ I'l5._‘ gHad‘, however, , the
travel of the ‘cradle, before the ‘elevator motor 62
was‘pre‘viously stopped, been in the upward ‘direc
tion,
the arm§226 ‘of the interlock switch would
35 have been
bearing on‘ the contact 236, contact beg
tween the arm l ‘M and‘ contact I15 being broken.
’ The actio‘n'of the mechanism to effect this result
is well known , and‘ need “not be‘ further: alluded to.
Contact ‘ being made‘; between-the arm’ 229 and
‘contact .230, circuit: would‘l‘be‘ established ‘from
positive "at'contactr 5,3,8 through switch 3 leads
I64, VIM-terminal‘ H5, le‘adI'IZ, switch‘ _l69,, lead
I13, arm 229, contact 236; leads 23I,‘2I0, terminal
H9, lead 2! I,‘ switch‘ ‘E; ‘lead 2I‘2, terminal’ IIB',‘
lead 2I3,,cont‘actor coil 2M, leads2l5, 183; I84, to
negative at I66. This serves to‘close switches 2 I8‘;
2 I 9 and 22.0, whereby the ,‘elevator‘motor is started
in such a direction as to cause the cradle to travel
v f
- ‘
50 v The action‘ ‘of ‘the switch D in controlling the
turntable motor- 63_wi1l now be described. " As the
cradle 66 passes the'f‘switch D,”circuit is broken at
55
60
contacts I 24 and I36and made at‘contacts I25
and 232. This establishes circuit from positive ‘at
contact ‘232 through switchD, lead ‘233; terminal
I25, lead 236, switch 2I'6,“ lead 235,'turntab1le moe
tor contactor coil 236, leadsv .231, I786, to?neg'ative
at Hill." This operatesto‘ close switchesw ‘238 and
239, and establishes circuitfromipositive ‘at iter-v
minal I‘29,‘_"leads§l59; I39, switch 239, leadf‘24B,
terminal AT, le'adf24l, turntable motor 63, lead
262, to negative at terminal ‘LT. Gearedto re
65
volve with the motor‘ 63‘ isthe ‘star-wheel 95,
whereby switch G ‘is'uhactuated.v Qn rotation of
the ‘star-wheel ‘95 the switch G, bridges‘ contacts
I26, 243; ‘whereby, shortly after the turntable mo-i
tor 63 hasbeen; started, alholding-on (circuit is
completed from positive absenteeism: jswitch
B via lead'ZM, ‘switch G, lead ,‘2'45,jtermirnal 1 I26,
lead 2416, switch 238, contacto‘r‘coil 2'36, leadsjv‘2‘3‘1,
E84, tonegative at I44. 'When,‘how.ever, the turn:
table motor 63 has‘revolved suf?cientl‘y ‘to turn
the. ‘table. 2 for the time being ‘in"positionl"‘Y,”
through'a right angle, the star-wheel ‘95 opera
75 cites to open'the switch‘G whereby the‘turhtable
‘
r
contacts at H6 after the last layer of pigs has
been ‘lifted,v and before the cradle 66 reaches the
In per- ~
forming these repeated reversals, howeverfcircuit
isv established independently of the [interlock
upwardly as previously described, ,
‘order that, for the reasons above mentioned, the
turntable shall be rotated through 180° instead 10
ation. ’ This is ‘driven in such a manner as to close
in‘ ‘the upward‘? and downward direction? as ‘re
40
lifted, ‘the switch G is maintained closed for a
period twice the length of its previous closures in
has'been emptied, the switchi‘H comes into oper
position ‘t‘Y”, it will continue by'virtue‘of‘ its-co
quired‘u‘ntil the table‘has- been emptied;
cycle of operations‘repeated. It will, however, be I"
observed that the form of the star-wheel 95 is
such that, after the last layer of pigs has been
In order to re-start the'conveyor ‘after a table
operation with‘- switches C and E'to ‘be repeatedly
reversed so thatthecradle 66 travels‘: alternately
20
opened thereby stopping the motor 63. It is then .
re-started as the cradle 63 on its succeeding up
ward travel passes the switch D and the above
of 90°.
‘ *It will belnoticed that;v once the- elevator ‘has
been started. by ‘one-‘of the tables 2 arriving; at
7
contactor 236 is delenergized‘ and its switches
switch‘ E. : ‘When 'actuation‘of this switch by the
cradle, occurs, the contacts In and !35 are
' ‘bridged and the reversing relay coil 22,4 excited 20
as above described. ‘Circuit is then established
from‘positive at contact I 31 of switch B through
lead 246, contacts ‘I I6 of switch H, lead 241, ter
minal I I6, lea‘d 248,'switch 226,‘ lead 266, conveyor
“contactor coil I53,=lead'I54,‘ terminal II3‘,‘le'ad'I55, ‘
self-closingswitch A,llead I56 to negative'at-‘ter
minal'l I I_; thereby switches I57 and I58 are closed
and the conveyor fmotor. 6|’ started as above set
forth. The conveyor then travels until the suc-'
ceeding ‘table arrives at position “Y” at which it
operates switch B ‘which servesv to stop the con
veyor'and control the movements of the elevator
and turntable in the manner above described.
After the'last table of the series has been ’
emptied and has left position “Y”, switch F is 3
opened by the'conveyor as above stated. This
operates to break thecircuit of the relay coil I67,
allowing switches I68, I69, and I'Hl toiopen and
stop the elevator.
Motion of the conveyor, how= V
everjcontinues until the switch of the motor 6| 40
is opened by actuation‘ of the switch‘A when the
leading tableof the series arrives at position “X”.
»} »While two examples of apparatus in accord
ance with the‘invention have been described and
‘illustrated, it is obvious that many other combina~ “
tions within its scope might be'devised. Fur
their, features above described might be combined
in ‘other ways: for instance, in the'apparatus de
picted in Figures 1 to 5, in place of‘ driving the
conveyor intermittently from a continuously re
volving shaft, it might be actuated by a separate
electric‘motorVunder‘automatic control, as de
scribed with reference to Figures 6 to 10.
-
. ,
~ ‘What‘I’claim, and desire to secure‘ by Letters
' Patent of the United‘States is:
555
‘1. Apparatus for" the‘ automatic delivery of
‘metal pigs, comprising’in combination a conveyor
in co-‘operativ‘e relationship with an elevator, a
series of tables on said conveyor for the recep
tion‘of groups of pigs, each of said tables being
revoluble about an axis at right angles to'its sup—
porting surface, means for rotating the table in
said series for I‘thetime being in operative rela
tionship with the‘ elevator througha right angle
after each layer of pigs in a group on said table
has been ‘lifted and a delivery device, on which
‘each layer of lifted pigs is deposited.
' '2‘. Apparatus for the automatic delivery of.
metal‘pigs stacked in superposed layers wherein
the pigs in each layer lie at right angles to the
pigs in the next layer, comprising in combination
a conveyor in co-operative relationship withian
elevator constituted by upper‘ and‘lower sprocket
wheels and endlesstravelling chain mechanism, a
series of 'lifting'cradles on said chainmechanism,
2,108,457
8
tion to lift a layer of pigs from said conveyor and
has deposited said layer on said delivery device.
8. Apparatus for the automatic delivery of
metal pigs, comprising in combination a con
and means operatively associated with the‘cradles
for rotating the stack of pigs relatively to the
conveyor to bring the top layer of pigs into posi
tion to be lifted, and means for causing the
veyor in co-operative relationship with an ele
vator, an electric driving motor for said ele
vator, a lifting cradle on said elevator, a de
cradles selectively to lift the top layer of pigs.
3. Apparatus for the automatic delivery of
metal pigs, comprising in combination a conveyor
livery device, reversing switches in the circuit
in cooperative relationship with an elevator, a
series of tables on said conveyor for the recep—
of said motor and actuating means for said
switches automatically operative when said cra 1O
10 tion of groups of pigs, each of said tables being
revoluble about an axis at right angles to its sup
porting surface, a continuously rotating shaft, a
friction slip device comprising driving and driven
members in operative. connection with said shaft,
dle respectively is in operative lifting position
relatively to the top layer of a group of pigs in
operative relationship with said elevator and has
deposited said layer on said delivery device.
9. Apparatus as in claim 8, wherein the actu
ating means effective for reversal when the cradle
is in position operative for lifting includes an
element so located as, when the cradle travels
downwards, to bear on the successive top layer
mutual engagement mechanism associated with
the driven member of said slip device and with
each of said tables and means, controlled in syn
chronism with the movements of said elevator,
for intermittently arresting rotation of said
driven member.
4. Apparatus for the automatic delivery of
20
of pigs.
10. Apparatus for the automatic delivery of
metal pigs, comprising in combination a con
veyor in co-operative relationship with an ele
metal pigs, comprising in combination a conveyor
in co-operative relationship with an elevator, a
series of tables on said conveyor for the recep
25 tion of groups of pigs, each of said tables being
revoluble about an axis at right angles to its sup
porting surface, a continuously rotating shaft, a
vator, a series of tables on said conveyor for the
reception of groups of pigs, each of said tables 25
being revoluble about an axis at right angles to
its supporting surface, an electric motor for ro
tating the table in said series for the time being
friction slip device comprising driving and driven
members in operative connection with said shaft,
mutual engagement mechanism associated with
the driven member of said slip device and with
in operative relationship with said elevator
through a right angle after each layer of pigs 30
each of said tables, a disc in driving relationship
with said driven member, projections on said disc,
a plunger movable into or out of engagement with
35 any of said projections, and a pivoted lever for
actuating said plunger in synchronism with the
movements of said elevator.
5. Apparatus for the automatic delivery of
metal pigs, comprising in combination a con—
40 veyor in co-operative relationship with an ele
vator constituted by upper and lower sprocket
wheels and endless travelling chain mechanism,
a series of lifting cradles on said chain mecha
nism, each of said cradles comprising a pair of
45 pivoted members capable of swinging toward or
away from each other, means for rotating said
sprocket wheels continuously in the same direc
tion, a projecting element on each of said pivoted
members and a plurality of cams each of which
50 is adapted selectively to engage one of the pro
jecting elements thereby holding the pivoted
members to which they are engaged out of en
gagement with selected layers of pigs.
- 6. Apparatus for the automatic delivery of
.55 metal pigs, comprising in combination a con
veyor in co-operative relationship with an ele
vator, a cradle on said elevator, mechanism on
said cradle for lifting the uppermost layer of
metal pigs in a group, a delivery device and means
60 for raising said cradle from the position in which
it is effective to lift a layer of pigs from a group
in operative relationship with said elevator to
that in which it deposits said pigs on said de
livery device and for returning said cradle by
the same path.
(2
-
7. Apparatus for the automatic delivery of
metal pigs comprising in combination a con
veyor in co-operative relationship with an ele
vator, an electric driving motor for said elevator,
70 a cradle on said elevator, mechanism on said
cradle for lifting the uppermost layer of metal
pigs in a group, a delivery device, ,reversing
switches in the circuit of said motor and actu
ating means for said switches automatically op
75 erative when said cradle respectively is in posi
on said table has been lifted, a starting switch
in the circuit of said motor and actuating means
for said switch operated by said elevator after
each of said layers has been lifted.
11. Apparatus for the automatic delivery of
metal pigs, comprising in combination a con
veyor in co-operative relationship with an ele
vator, a series of tables on said conveyor for the
reception of groups of pigs, each of said tables
being revoluble about an axis at right angles to
its supporting surface, an electric motor for ro
tating the table for the time being in operative
relationship with said elevator through a right
angle after each layer of pigs on said table has
been lifted, a switch in the circuit of said motor
and means, actuated on rotation of said table,
whereby, on completion of rotation through a
right angle, said switch is opened and said motor
stopped.
12. Apparatus for the automatic delivery of
metal
veyor
vator,
veyor,
pigs, comprising in combination a con
in co-operative relationship with an ele
an electric driving motor for said con
a switch in the circuit of said motor, mech
anism automatically actuated by the motion of 55
said conveyor whereby said switch is opened when
said conveyor is in a position such that a group
of metal pigs on said conveyor is in operative re
lationship with said elevator, and mechanism for
closing said switch automatically actuated on re
moval of the lowest layer of pigs in a group in
operative relationship with said elevator.
13. Apparatus for the automatic delivery of
metal pigs, comprising in combination a convey
or in co-operative relationship with an elevator, 65
an electric driving motor for said conveyor, a
switch in the circuit of said motor, mechanism
automatically actuated by the motion of said
conveyor whereby said switch is opened when said
conveyor is in a position such that a group of 70
metal pigs on said conveyor is in operative re
lationship with said elevator, a further switch
in the circuit of said motor, a series of tables
on said conveyor for the reception of groups of
pigs, each of said tables being revoluble about
9
2,108,457
an axis at right angles to its supporting surface,
a motor for periodically rotating the table in said
series in operative relationship with said ele
vator through a right angle and means for clos
ing said switch automatically actuated by said
second-mentioned motor.
14. Apparatus for the automatic delivery of
metal pigs, comprising in combination a conveyor
in co-operative relationship with an elevator, an
10 electric driving motor for said conveyor, a switch
in the circuit of said motor, mechanism automati
cally actuated by the motion of said conveyor
whereby said switch is opened when said con
veyor is in a position such that a group of metal
15 pigs on said conveyor is in operative relationship
with said elevator, an electric driving motor for
said elevator, a switch in the circuit of said mo
tors respectively actuating said conveyor and
said elevator and means for opening said switch
20 automaticaly actuated on motion of said con
veyor after the last group of pigs has been re
moved from its position of operative relationship
with said elevator;
15. Apparatus as in claim 6, including out
wardly inclined ramps located in that part of
the path of the cradle traversed immediately
after said layer of pigs has been deposited on said
delivery device and pivoted ?aps in proximity to
said ramps, whereby the elements of said cradle
are separated clear of said layer of pigs and are
maintained so separated during the return travel
of said cradle past said layer.
'
16. Apparatus for the automatic delivery of 10
metal pigs, comprising in combination a conveyor
in co~operative relationship with an elevator; a
series of tables on said conveyor for the recep- ,
tion of groups of pigs, each of said tables being
revoluble about an axis at right angles to its sup
15
porting surface, and means in operative associ
ation with said elevator for intermittently rotat
ing the table for the time being in operative re
lationship with said elevator about its axis
through a right angle.
20
VINCENT TOBIA.
Документ
Категория
Без категории
Просмотров
0
Размер файла
2 147 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа