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Патент USA US2133315

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Oct. 18, 1938.
'
A. N. YORK
2,133,315
CAN CLOSING MACHINE
_
Filed Sept. 1.1, 1936~
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ATTORNEYS
Oct. 18, 1938.
'
A. N. YORK
‘
CAN
CLOSING MACHINE
Filed Sept. 11, 1936
/
2,133,315
4 Sheéts-Sheet 3
Oct. 18, 1938.
2,133,315
A. N. YORK
CAN_ CLOSING MACHINE
Filed Sept. 11, 1936v
143
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ATTORNEYS
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Patented Oct. is, 1938
i
' 2,133,315
UNITED STATES PATENT OFFICE-p
-
2.133.315
can CLOSING MACHINE
Archibold N. York, Geneva, N. Y., assignor to
American Can Company, New York, N. Y., a
corporation of New York
Application September 11, 1936, Serial No. 100,394
14 Claims.
(01. 113-82)
The present invention relates to container or
the valves are so positioned and locked and
can closing machines of the type which have
which also prevent operation of the machine
valves for moving the cans into and out of a while the valves are so locked.
vacuumized can closing chamben'the invention ,- A further object is the provision in such a
5 having particular reference to a hoisting mech-
10
machine, of elements which Prevent opel‘etioh 5
anism, embodied in the machine and utilized for
of the hoist when there is a vacuum in the can
raising the valves out of their seats so that they
may be cleaned and lubricated and for returning
them again to position within their seats.
closing chamber of the machine and which also
prevent Operation of the machine While the
Valves-are out of their seats and until they have
Proper care in cleaning and lubricating the
valve seats and valves of vacuum can closing ma-
been replaced and a predetermined vacuum
again created in the can closing chamber
10
chines is essential in maintaining .a tight at beNumerous other objects and advantages of the
tween valve and seat to insure against loss of invention Will be apparent as it is better under
vacuum in the closing chamber. These valves stood from. the following description, Which,
15 are usually ponderous and heavy and hard to_ taken in connection with the accompanying 15
manage although proper care requires that they
be removed frequently. Canning factories where
the machines are used to seal ?lled cans are
usually not equipped with machinery for han20 dling these valves and hence considerable dim-
culty is sometimes experienced in properly
cleaning and lubricating the valves and their
seats.
The present invention contemplates a self25 contained hoist which is built into the machine
so that lifting of the valve out-of its seat and
returning it again is made an easy operation
thereby saving both labor and expense and more
readily effecting proper working e?iciency.
30
An object, therefore, of the invention is the
provision of a self-contained hoist in a valve
drawings, discloses a preferred embodiment
thereof.
Referring to the drawings:
Figure 1 is a top plan view of a vacuum can
Closing machine embodying the instant inven- 20
tion, With parts broken away;
Fig.2 is a fragmentary front elevation of the
upper part of the machine showing the valves in
raised position above their seats and showing
parts of the hoist for raising and lowering the 25
Valves, parts being broken away;
Fig. 3 is a longitudinal Section Of the upper
part of the closing machine, the View being
iiakeh Substantially along a plane extending
through the vertical axes of the valves;
30
Figs. 4 and 5 are horizontal sectional details
type vacuum can closing machine wherein the
taken substantially along the lines 4-4, 5—5 in
valve or valves may be lifted from their‘ seats
Fig. 3;
for lubricating and cleaning or changing of
35 parts and may be returned again to proper position within their seats without dismantling the
.
I
Figs. 6 and 7 are horizontal sections taken
substantially along the line 6-6 in Fig. 3, and 35
showing in different positions parts of one of the
machine. -
valves and the mechanism for locking the valve
Another object is the provision in such a ma-
in a predetermined position before raising, parts
chine, of electric controls for governing the rais- I being broken away;
40 ing and the lowering of the valves relative to
Fig. 8 is a sectional detail of the valve locking 4;,
their seats so that in lifting the valves the oper- mechanism, the view being taken substantially
ation of the hoist ceases when they are clear along the line 8-8 in Fig- 7. with parts broken
of their seats or in their desired upper position away;
where they will be easily accessible and also so
Figs. 9 and 10 are sectional details showing
45 that upon returning the valves to their seats, the different positions of parts of the electric con- 45
operation of the hoist ceases when the valves ' trol devices associated with the valve locking
are again in their fully seated position.
Still another object is the provision in a ma-
mechanism, the sections being taken substan
tially along the line 9-4! in Fig. 3;
chine of this character, of a locking mechanism
Fig. 11 is a horizontal sectional detail taken
50 for locking the valves in a predetermined posi-
substantially along the line ll—-Il in Fig. 10; 50
tion in their cycle of rotation or other movement
so that movable parts within the valves are
properly disposed before ‘the valves are raised,
the locking mechanism controlling electric de55 vices which prevent operation of the hoist until
and
.
'
Fig. 12 is a wiring diagram of the electric cir-.
cuits utilized in the machine.
As a preferred embodiment of the invention the
drawings disclose the principal parts of a vacuum 55
2
2,133,315
can closing machine of the character shown in
United States Patents 1,969,717, issued August 14,
1934, on "Vacuum machine” and 1,985,883, issued
January 1, 1935, on "Can feeding machine”.' Un
sealed cans with their covers loosely held in place
as by clinching or otherwise, are introduced into
a vacuum chamber where can and cover are
the valve rotates. Similar ?ngers in the exit
valve sweep the sealed cans out onto a suitable
vdischarge table 43 (Fig. 1).
Lifting of the valves out of their seats for
cleaning and lubricating and the returning of the
valves again to their seats is effected by a hoist
mechanism indicated broadly by the numeral 55
(Figs. 1; 2 and 3). The hoist mechanism includes
united in a sealing connection as by an inter
folding of their parts or in any other suitable , a. pair of elongated elevator screws 56, 51“ ver
10 manner.
The cans are introduced into the vacuum cham
ber and are discharged therefrom by way of ro
tating entrance and exit valves which are pro
vided with suitable pockets in which the cans are
15 carried. Cam actuated ?ngers in the pockets of
the entrance valve sweep the pocketed cans car
ried by this valve into the vacuum chamber at the
proper time while similar ?ngers in the pockets‘
of the exit valve sweep the cans carried by it, out
20 onto a table or other suitable place of discharge.
Each of the valves is removably seated in and
is partially surrounded by a housing which pre
vents the entrance of air into the vacuum cham
ber as the valves rotate. Closely connected with
25 the valves is the hoisting mechanism for lifting
tically and centrally disposed over the tops of the 10
valves 24, 25, respectively.
The upper ends of the elevator‘ screws 56, 51
are rotatably carried in bearings 58 formed in
the bottom of separate gear cases GI, 62. Gear
case BI is formed integrally with a bracket 83 15
secured by bolts 64 to the top of the housing l2.
Similarly gear case 62 is formed on a bracket 65
secured by bolts 68 to the top of the housing I2.
The elevator screws 56, 51 are identically sup
ported and connected with their respective valves, 20
therefore it is thought that a description of one
of them will su?ice for both.
-
The elevator screw 56, for example, carries a
bevel gear 61 which is disposed in its gear case
BI, and this bevel gear is connected to its ele 25
the valves from their seats to permit cleaning I vator screw by a feather 68 (Fig. 3).
and lubricating and for returning them again into
The lower end of the elevator screw is engaged
fully seated position. It is to this feature that in a threaded nut ‘H which is provided with a
the invention is particularly directed.
pair of oppositely disposed wings 12 projecting _
Only su?icient of the can closing machine is from its sides. The wings extend into vertical 30
30
herein illustrated anddescribed to provide a clear elongated slots ‘I3 formed in the side wall of a
understanding of the present invention, the hoist
stationary tube 14 which surrounds the elevator
ing mechanism being shown in some detail.
screw. The upper end of the tube is keyed against
Such a disclosurepreferably embodies a main rotation within a collar 15 formed on the bottom
35 supporting frame or housing ll (Fig. 3) having of the gear case.
35
mounted thereon an auxiliary housing l2. These
housings enclose a vacuum chamber (indicated by
the numeral 13) into which cans l4, havingloose
ly applied covers 15, are‘introduced for vacuumiz
ing and closing or sealing.
'
The chamber I3 is vacuumized in any suitable
or usual manner as by means 'of a suction pump
or vacuum tank (not shown) which communicates
with a pipe line i‘! (Fig. 1) leading from the
45 vacuum chamber.
The vacuumized cans are
closed or sealed in the usual manner by a suitable
seaming head [8 (Fig. 3) which is disposed in the
vacuum chamber. The seaming head is pref
erably mounted in a bearing formed in the hous
ing l2.
.50
- The cans [4 are delivered into the vacuum
chamber I3 and are discharged therefrom through
openings 2| formed in opposite side walls of the
frame H and by way of rotatable entrance and
55 exit valves 24, 25 disposed adjacent these open
ings. The valves operate in and are partially
surrounded by valve seats 28, 21 formed in hous
ings 28, 29 bolted to the sides of the main frame.
The valves 24, 25 are rotated in their seats
28, 21 through tongue and groove driving connec
tions 3| with ?anged hubs 32 which in turn are
keyed to vertical drive shafts 33. The shafts are
journaled in bearings 34 formed in brackets 35
which are secured to the sides of the main frame.
65 These shafts are rotated in unison in any suitable
manner.
.
'
a
The valves are provided with a plurality of
spaced can carrying pockets 8'! into which the
cans l4 are deposited in the usual manner. Each
70 pocket is provided with a. ?nger 88 mounted on a
vertical pin 39 carried in a bearing 4| of the
valve, the pin being periodically rocked by a
cam 42 mounted on top of each valve. It is these
?ngers which sweep the cans from the pockets of
the entrance valve into the vacuum chamber as
The lower end of the tube 14 extends below
the end of the elevator screw and rests on top
of a spacer shaft 11. The top of the spacer
shaft is provided with a trunnion 18 which is
journaled for rotation in a bearing 19 carried in 40
the lower end of the tube. The spacer shaft
extends through a central ,bore 8| formed in
the valve and has its lower end supported in a
recess 82 formed in the top of the valve drive
shaft 33.
The spacer shaft 11 is smaller in diameter
than the bore 8| with the result that the valve
is free to ?oat and thus ?t more snugly within
its seat. The shaft is feathered in the valve
which permits raising and lowering of the latter
without getting out of alignment with the 50
tongued driving connection 3| as will be herein
after more fully explained. It will be evident
that the parts just described as being associated
with the elevation screw 56 are duplicated in
connection with the elevator screw 51.
The valves 24, 25 carry sleeves 85 which sur
round the spacer shafts 11. The lower end of
each sleeve is formed with an out-turned ?ange
88. In the case of the entrance valve 24 this
?ange rests on top of the central hub of the
valve and is secured in place by long bolts 81
which are held in the bottom of the valve (see
Fig. 3). In the exit valve 25 the ?ange rests on
top of the valve and is secured by cap screws 88.
The upper ends of the sleeves 85 extend above
the elevator screw nuts 1| and are formed with
in-turned ?angesv 88 which surround the ele
vator screw tubes ‘I4. A pressure distributing
collar 92 (Figs. 3 and 4) is disposed inside each
sleeve 85 between the flange 88 and the wings 12
of the nut ‘H and is adapted to engage against
the sleeve ?ange when the valve is raised.
55.
60
65
70
By means of this construction and by a ro
tating'movement in one direction of the elevator 75
3
9,188,815
guide: rod I08. ' The end of the slide III opposite '
screws 56, 51, the nuts H are caused to ride up
in the slots 13 of the screw tubes 14, the slots of
the stationary tubes preventing turningvcf the
nuts. The lifting pressure of the distributing
collars 92 ?rst brings the latter into engagement
with the ?anges 89 of the sleeves 85 and then
lifts the sleeves and the attached valves. This
the tongue end is formed with a curved section
I2I (Figs. 6 and 8) which partially surrounds
the guide rodand is provided with a pair of inner
cam edges I22, I23.
carries the valves away from the driving connec
The'cam edge I22 when the guide prod I08 is'
in unlocked position (Fig. 6) is held against the“
rod by a tension spring I24 (Fig. 8) disposed in '
tions 3| while still maintaining alignment with
10 the latter.
The elevator screws 58, 51 are rotated in uni
a recess I25 of theguide block I06. One end of
the spring is hooked into a screw eye I26 secured 10
to the guide block while its opposite end is
hooked into a similar screw eye I21 secured to
This latter screw eye extends
through a clearance slot I28 formed in the floor
son so that both valves are raised or lowered at . the slide III.
the same time. This is effected by a cross shaft
95 having its ends mounted in bearings 96 formed
15 in the gear oases 6|, 62. The cross shaft carries
of the slideway II3.
A shortlkey I3I ?xed in
bevel gears 91 which mesh with and rotate the
the guide rod I08 engages the cam edge I23 at
such a time and holds the slide III in retracted
elevator screw gears 61 when the cross shaft
or unlocked position.
turns.
-
The shaft also carries a slip clutch 98 which
is disposed in the gear case 6| and which is pro
vided with a worm wheel 99. The worm wheel
meshes with a worm IOI secured to a shaft I02
of a reversible electric motor I03 (Fig. 1) mount
ed on the bracket 63. This motor is the source
of power for rotating the cross shaft 95 in either
direction.
'
-
In raising and lowering_ the valves 24, 25 the
longer than thé ?rst key and located in the op 25
posite side of guide rod I08 moves into engage
ment with the cam edge I22 and then pushes the
?nger timing cams 42 are lifted or lowered with
slide forward against the resistance of the spring
the valves. The cams have no 'rotative movement
at any time and are held against rotation in a
manner to permit their raising and lowering with
the valves. For this purpose the cams are pro
vided with guide blocks I05, I06 (Figs. 2, 3, 6 and
8) which may be bolted to the tops of the cams
or otherwise secured _in
_
When the ‘guide rod I09 is turned, by means of
the handle I09, in a counter-clockwise direction, 20
(1. e., from the position shown in Fig. 6 into that
shown in Fig. '7) the key I3I is rocked away from
the cam edge I23, this action releasing the slide.
In this same movement another key I32 much
any suitable manner. -
The guide blocks engage vertically disposed guide
rods I01. I08 carried in suitable bearings formed
in the gear case brackets H, 62, and in the main
frame brackets 35. The guide rod I01 is sta
tionary but the rod I09 can be oscillated within
its bearings. Rod I08 is rocked on its axis by a
I24 thereby moving the tongue II6 into a notch
H1 and hence locking the valves against rota 80
tion as already described.
‘ The key I32 is of sufficient length to hold the
slide III in locked position irrespective of the
vertical position of the valve. A clearance groove
I33 cut in the block I06 provides for clearance 35
of the key and allows for this vertical movement
of the valve and the block. A second clearance
groove I34 cut in the block ,I06 provides for
freedom of vertical movement relative to the key
I3I by allowing the block to clear the key when 40
it is lifted with the valve or returned to lowered
position.
handle I09.
To prevent damages to the valve ?ngers 38
whenthe valves are raised out of their seats the
Turning of the guide rod I08 to lock the valves
against rotation also prepares for the lifting of
valves are brought to rest in a predetermined po
operative until the valves are again unlocked.
45 sition in which position all of the ?ngers are
completely within the valve pockets as shown in
Fig. 7. The valves are then looked against rota
tion by direct holding of the exit valve 25. Since
both valves are in effect connected together by
the mechanism which rotates them, the locking
of the exit valve also serves to lock the entrance
valve. This locking is effectedby a slide I II (Figs.
2, '7 and 8) which is carried in a slideway II3
formed in the top of the guide block I06. A
55 cover plate II4 secured to the block holds the
slide in its slideway.
At one end the slide III is formed with a
locking tongue II6 which is engageable into a
notch II1 formed in a collar II8 mounted on
and secured to the exit valve sleeve 85. Thus the
collar rotates with the valve under normal oper
ation of the machine. When the machine is to
be stopped, to prevent locking of the valves it is
logged along or moved slowly as by alternate op
eration of a start and stop switch device, here
inafter referred to, until a notch H1 is in proper
position to be engaged by
the locking tongue IIG. -
There are a_ plurality of these notches II1, one
70 for each pocket in the exit valve, and any one of
these notches when engaged by the slide tongue
III locks the exit valve and through it also the
entrance valve against rotation“
The slide tongue I I8 is moved into engagement
with a notch II1 by a cam connection with the
45
the valves as well as rendering the machine in
This is done electrically by means of a double
pole hoist motor switch I35 (Figs. 9, 10 and 12) .
The electric circuits utilized for this work will be
hereinafter explained in connection with the wir
ing diagram illustrated in Fig. 12.
50
The switch I35 is mounted on the gear case
bracket 65 (Figs. 1, 2 and 3) and is formed with
a movable element I36 which at times is engaged
by the head of a pin I31 carried in a boss I38
formed on thebracket. A cam I39 mounted on
the guide rod I 08 raises thepin and the mov
65
able switch element when the guide rod I09 has
been turned into its valve locking position (as
60
shown in Figs. '1, l0 and 11).
Before the valves can be raised the vacuum
in the vacuum chamber I2 must be broken and
the chamber brought under atmospheric condi
tions. This introducing of air into the chamber
may be done in any suitable manner either 65
mechanically or manually. To graphically indi
cate the establishment of such conditions the ' '
drawings disclose a two-way valve I43 (Fig. l) I
which is located in the vacuum pipe line I1.
The position of the valve as shown connects the 70
chamber I3 with the vacuum pipe line. When
the handle of the valve is turned counter-clock
wise, the pipe line is cut off and the chamber is
opened to the ‘atmosphere.
'
The preventing of the valve lifting action when 75
4
there is vacuum in the chamber I3 may be ac
complished by a vacuum control device (indi
cated broadly by the numeral I44) which utilizes ,
an electric switch included in the electric cir
cuits used for operation of the lifting motor I63.
This will be further mentioned in connection
with the description of the wiring diagram (Fig.
12) to follow.
Such a vacuum control device may comprise a
'10 sylphon bellows connected with a mercury switch
three wire system comprising service wires I12,
I13, I14 and through a main service switch Ill
and a. solenoid-operated'switch I16 when the lat? '
ter is closed. In order to close this switch, con
trol circuits comprising a machine pie-starting
and a machine starting circuit are used.
.
When the valves are being lifted by rotation of
the screws 56, 51 current for operating the'hoist
motor I03 is taken from the service wires I12,
I13, I14 and is transmitted to that motor by 10
way of service wires I11, I16, I16 and thence
which may be encased in a suitable housing lo
cated on the vacuum supply pipe I1 adjacent the
closing chamber. A change of degree of vacuum
in the pipe and in'the closing chamber acts on
15 the bellows to tilt the mercury switch in accord
through one or the other of motor reversing sole
noid-operated switches I6I, I62 one of which is
closed at the time. The selective closing of
25
rlifcted to the service wires I11, I19- by wires I66,
switch I8I or switch I82 is e?ected by the use of
ance with the vacuum condition. This is a well
known form of control which is often used in control circuits comprising a valve elevating
vacuum closing machines. A suitable device of starting circuit or a valve lowering starting cIr-‘
cult which will be fully set forth as the descrip
this character is disclosed in United States Pat
tion proceeds.
20, ent 1,841,326 issued to Lewis W. Eggleston Jan
The control circuits are of the two wire system 20
uary 12, 1932, on “Controlling means”.
type
receive electric energy from the gen
Provision is also made for limiting the amount eratorand
by
way of a step-down transformer I66.
of travel of the valves 24, 25 either in their up
The primary side or this transformer is con
ward movement or in their return. This is done
electrically and includes stop switches which
may be mounted upon the gear casings 6i, 62.
These switches are actuated by movable parts of
the valves.
In the valve raising action the top of the exit
30 valve 25 when brought into its upper position
engages against the lower end of a pin I41 (Figs.
1, 2, 3 and 5) and lifts the pin which opens an
electric circuit. This pin is vertically disposed in
suitable bearings formed in the gear case 62.
35 At its upper end the pin carries an arm I48 hav
ing at its free end a stud I49 which is guided in
a bore formed in a cover of the gear case 62. The
guide stud is located directly under a movable
element I5I of a normally closed stop‘ switch I52
40 mounted on top of the gear case.
When the valves are returned to their seats,
the wing 12 of the elevator screw nut 1I associ
ated with the entrance valve 24 engages against
the wall of the tube 14 at the lower end of the
45 slots 13, bringing the nut to rest. The rotating
elevator screw 56 thereupon moves endwise in its
threaded seat within the then stationary nut
lifting vertically in~its bearing 58 and sliding in
the gear 61 at its feather connection 68, as shown
in Fig. 3.
The screw 56 then stops turning but stays in
its raised position. In this lifting action the up
per end of the screw engages against and raises
a movable element I55 of a stop switch I56, the
55 element being carried in a bearing I51 formed
in the cover of the gear case 6|. The stop switch
I56 is mounted on top of the gear case.
'
This lifting of the movable element opens the
switch I56 and breaks the hoist motor holding
circuit which includes the switch. . The open po
sition of the switch therefore constitutes its nor
mal position and the switch stays open or nor
mal during the operation of the machine. The
hoist motor holding circuit together with other
65 associated electrical circuits will now be de
scribed.
Reference should now be had to the wiring dia
gram (Fig. 12). The machine motor for oper
ating the main parts of the apparatusis desig
70 nated in this diagram by the numeral I65 and
electric energy for operating this motor is sup
plied in any suitable manner as by a generator
I1I which also supplies current for the hoist mo
tor as well as for the various control circuits.
75 Current passes from the generator by way of a
1.
a
'
The machine pre-starting circuit is only 25
closedwhen the valves 24, 25 are in proper seated
and operating position and unlocked and only
when there is a predetermined degree of vacuum
within the chamber I3. When in such condi 30
tion the movable element I36 of the switch I36
is in the position shown in dotted lines, engaging
with lower switch contacts I86, I89. Further
more, when the valve and the vacuum in cham
ber I3 are in the condition above described a
mercury switch I90 of the vacuum control device 35
I44 is in the tilted position indicated in dotted
lines, this closing the gap between switch con
tacts I9I, I92.
'
Electric energy activating the machine pre
startfng circuit passes from the secondary side 40
of the transformer I65 through a wire I95, mov
able element I36 of switch I35, a wire I96, mer
cury switch I90 at contacts I9I, I92, a wire I91,
a solenoid I98 and back to the transformer by
way of a wire I99. This ?ow of current energizes‘ 45
the solenoid I 98 and thus closes a normally open
relay 20I.
.
Relay MI is included in the machine starting
circuit together with machine start and stop
switches 202, 203 which control the normal 50
starting and stopping of the machine motor
I 65.
To set the machine in operation the ma
chine starting circuit is closed by momentarily
closing the starting switch 202. Electric energy
from the generator I1I then passes from service
wire I14 through a wire 205, starting switch 202,
a wire 206, stop switch 203, a wire 201, closed
relay 20I, a wire 208, a solenoid 209, a wire 2“,
back into service wire I12. This flow of current 60
from the transformer energizes the solenoid 209
which in turn closes the machine motor switch
I 16 thereby transmitting energy from the gen
erator I1I directly to the machine motor I65.
Closing of the machine motor switch I16 auto 65
matically establishes a machine holding circuit
which maintains continued operation of the mo
tor I65 after release of the starting switch 202.
The holding circuit is established by the closing
of a single contact 2I2 which is formed as a part 70
of the motor switch I16 and which closes when
the switch is closed. This holding circuit cuts out
the starting switch 202. Energy then passes from
service wire I14 through contact 2I2, a wire 2I3,
thence through the stop switch 266, closed relay 75
2,188,815
wires 229, Ml, I99 back to the transformer.
20I, and solenoid 209 returning by way of service‘ 228,
Electric
energy passing through this circuit.
wire I12 to maintain the solenoid energized and
energizes thez‘solenoid 229 which closes the hoist
‘the motor switch I16 closed.
Provision is made for stopping operation 0! motor switclif I8I. Closing of this switch per
'
the machine in case the vacuum condition in the
closing chamber I3 ‘should fall below a predeter
mits electric energy from the generator "I to
.pass from the service wires I11, I18, I19 through '8
mined degree. For. this purpose the machine the switch I8I, wires 236, 231, 238 and thence into
holding circuit, keeping the machine motor I65 the motor I03 causing it to turn the elevator
in operation, is maintained under the control screws 56, 51 in the proper direction for raising 10'
the valves 24,25 out of their seats as hereinbe
10 of the machine pre-starting circuit. Thus a fall
ing oil of the vacuum, as detected by the vacuum fore explained. . ‘
Since closing of the starting switch 2 I9 is only
control devices I44, immediately tilts the mer- *
momentary action, a valve elevating holding
cury switch_‘I90 in the opposite position (shown ' acircuit
is established simultaneously with "the
in full lines, Fig. 12) so that the gap between the
15
contacts I9I, I92 is opened. This breaks the ma- , closing of the motor switch IN and this keeps
15
chine pre-starting circuit with the result that
the solenoids‘ I98, 209 are de-energized and the,‘
machine holding circuit is thus broken causing
the machine motor switch I16 to open. This
20 stops the operation of the motor I65 and hence
stops operation of the machine. The machine
motor cannot then be started again until the
degree of vacuum in the closing chamber is high
enough to again tilt the mercury switch I90 to
the gap between its contacts I9I, I92.
2,5 close
Normal stopping of the machine is effected by '
opening the machine stop switch 203. This will
deenergize the solenoid 209 and open the machine
the motor I03 in continuous operation until the
elevating of the valves is completed, this being
when the valves are clear of their seats.
Thevalve elevating holding circuit is estab
lished by closing of a single contact 242 formed 20
as a part of switch I8I and which automatically
closes with the switch. Thus when the starting
switch 2I8 resumes its normal open position as
shown- in full lines in Fig. 12, energy from "the
transformer passes from the wire 226 along a 25
wire 243, through contact 242, a wire 244, wire
221, solenoid 228, and wires 229, 23I, I99 back to
the transformer. This circuit maintains the
solenoid 229 energized while the starting switch motor switch I16 even if suillcient vacuum is. is open and thus keeps the motor switch I8I 30
30 maintained in the closing chamber.
The valve elevating starting circuit and the
When the valves 24, 25 reach the top of their
valve lowering starting circuit which are asso
desired
travel they open the stop-switch I52 as
ciated with the operation of the hoist motor I03
for rotating the elevator screws 56, 51 in raising hereinbefore explained. This breaks the valve 35
elevating holding circuit just described. The
35 and lowering the valves 24, 25 also include the solenoid 228 is thus deenergized and the switch
hoist motor switch I35 and the mercury switch
I8I is opened in the usual way. This stops the
I90, these switches being closed in such a manner
as to entirely out out the circuits associated with motor I03 and further rotation of the elevator
the machine motor I65. It will be remembered screws 56, 51 which thus stops further raising of 40
the valves.
40 that before raising the valves the vacuum in the
Lowering of the valves 24, 25 again to position
can closing chamber I3 must be dissipated, the
closed.
machine stopped, and the valves locked in a pre
.determined position as hereinbefore explained.
Locking of the valves disengages the movable
45 element I36 of the switch I35 from the contacts
I88, I89 and brings it into engagement with a
pair of new contacts 2I4, 2I5 shown in full lines
in Fig. 12. This breaks the machine motor cir
cuits and prevents operation of the machine mo
50 tor I65 until the valves are again unlocked which
ordinarily does not .take place until after the
valves have been raised out'of their seats and
again returned.
,
Dissipation of the vacuum in the can closing
chamber
I3 rocks the mercury switch I90 to a
55
position where the contacts I9I, I92 are opened
as has already been described. The switch I90
also has a. pair of contacts 2I6, 2" which are
closed when contacts I9I, I92 are opened and are
60 opened when contacts I9I, I92 are closed. It is
the closing of contacts 216, 2I1 which permits
use of the valve elevating circuit and the holding
circuit associated therewith. This will now be
explained.
65
To raise the valves 24, 25 out of their seats, the
valve elevating starting circuit is completed by
pressing a starting switch 2I8 to bring it into its
starting position, indicated by dotted lines in Fig.
12. Electric energy from the secondary side of
70 the transformer I85 then passes along wire I95,
a wire 2I9, switch I35, a wire 220, an emergency
switch 22I, a wire 222, contacts 2I6, 2I1 of
switch I90, a wire 223, stop switch I52, a wire
224, a valve lowering start switch 225, a wire 225,
75 closed starting switch 2I9, a wire 221, a solenoid
'
_
.
within their seats is effected by similar circuits
which are established to cause motor I03 to ro
tate the elevator screws 56, 51 in a reverse direc
tion. A valve lowering starting circuit is estab
lished by pressing the starting switch 225 and
moving it into the position shown in dotted lines
in Fig. 12. Electric energy from the transformer
I95 is then transmitted by way of wires I95, 2I9,
switch I35, wire 220, emergency switch 22I, wire 50
222, a connecting wire 245, closed stop switch I55
(dotted position), a wire 241, starting switch 2I8,
a wire 249, closed starting switch 225, wires 249,
25I, a solenoid 252, wires 253, 23I, I99 back to the
transformer.
_
-
Energy passing along this valve lowering start
ing’circuit energizes the solenoid 252 which closes
the hoist motor switch I82., Closing of this switch
permits energy to pass from the service wires I11,
I18, I19, through the‘switch I82, and wires 256,
251, 258, into the hoist motor I03. This flow of
current through the motor being in the opposite
direction to that described for the valve elevating
action causes the motor and the screws 55, 51, to
rotate in reverse and hence to lower the valves 65
into their seats.
A valve lowering holding circuit‘ is established
to maintain continued operation of the hoist
motor after the startingv switch 225 is released
and returned to its normally open position. This 70
holding circuit is established by a single contact
26I which is associated with the main switch I92
and which closes when the main switch closes.
Electric energy then passes from the wire 248,
along a wire 262', contact 26I, wires 253, “I,
6
8,188,815 '
solenoid 252, wires 250, 23L I00 back in the trans
former. This keeps the solenoid 252 energized and
hence maintains the main switch I02 in closed
position during" lowering of the valves.
its attendant advantages will be understood from
When the valves 24, 25 are again returned with
the foregoing description, audit will .be appar
ent that various changes may be made in the‘
form, construction and arrangement of the parts
without departing from the spirit and scope or
in their seats, the closed stop switch I55 is again
the invention or sacrificing all of its material ad- '
opened to its normal position as herelnbefore ex
plained to break the valve lowering holding cir
cuit. The solenoid 252 becoming de-energized,
10 causes the main switch I02 to open and to stop
the hoist motor I00. The valves 24, 25 may now
be unlocked after which if the machine is to be
operated the foregoing steps will be carried out.
A brief recapitulation of the operation ‘of the
15 elevator screws 55, 51 through one complete cycle
including raising and lowering of the valves 24,
25, will now be given. Before actually beginning
the cycle and as a preliminary step, the machine
motor I65 must necessarily be stopped. Then the
20 exit valve 25 is manually locked by movement of
the locking handle I00 and this also looks valve
24. The movable element I36 of the switch I35~ is
thereby brought into engagement with the upper
contacts 2“, 2I5 which are thus included as a
25 Part of a circuit which‘ connects with the hoist
motor I03.
Electric switch I52 at this time is
closed and switch I56 is open.
'
The starting switch 2I8 is pressed in and the
cycle begins as current established by the switch
30 energizes the hoisting motor I03 and the elevator
screws 56, 51 start rotation. There is a slight
time lag before the entrance valve’ 24 is lifted as
its turning screw 56 moves down within the nut
'II permitting the descending screw head to re
vantages, the form hereinbefore described "being
merely a preferred embodiment thereof.
I claim:
1. In a vacuum machine for cans, the combina 10
tion of a housing enclosing a vacuum chamber
and having openings for the passage of cans
therethrough, valve seats connected with said
housing adjacent said openings, valves ?oatingly
disposed in and upwardly from said seats for
normally conveying cans into and out of said
15
vacuum chamber, rotatable elevator screws an
chored in said housing as a'permanent part
thereof and rotatably connected with said valves
for moving the latter vertically relative to their 20
seats for lubrication and cleaning, and driving
elements for rotating said elevator screws in one
direction to lift said valves out of their seats and ’
’ in the opposite ‘direction to return them again to
fully seated position.
25
2. In a vacuum machine for cans, the combina
tion of a housing enclosing a vacuum chamber
and having openings for the passage of cans
therethrough, valve seats secured to said hous
ing adjacent said openings, rotatable valves dis 30
posed ln and upwardly movable from said seats
for conveying cans to and from said vacuum
chamber, rotatable elevator screws anchored in
said housing as a permanent part thereof and ro
35 lease the movable element I55 of switch I56 ‘ tatable in two directions having connection with
35
which action closes the switch. Both valves 24, 25
clear their seats or to reseat the valves after clear
lengths of their rotating screws 56, 51.
ance, a driving element connecting with said ele
When the raised valves reach their upper limit
vator screws for rotating them in unison, and a
gagement with the movable switch element I5I.
This breaks the current and stops the motor I03
reversible electric motor for rotating said driv
ing element in either direction to raise and lower
said valves in unison.
40 of travel the exit valve 25 opens switch I52 by en
and the screws 56, 51 cease rotation.
_
To return the valves to their seats starting
45 switch 225 is pressed in and the motor I03 there
upon operates in a reverse direction. It should
be recalled that switch I56 is now closed and
switch I52 is open. The motor rotating the
screws 56, 51 in a reverse direction lowers the
50 valves into their seats. The movable element
I5I upon being disengaged closes the switch I52.
The effect of the ?nal phase of rotation of the
elevator screw 56 after the entrance valve 24 is
fully seated is to slightly elevate or back up the
55 screw and to lift‘its head against and to raise
the movable element I55 of the switch I 56 there
by opening the switch. This breaks the hoist
motor reverse circuit and the motor I03 stops, the
60
said valves for moving the latter vertically to
move out of their seats and travel up along the
screws 56, 51 cease turning.
pleted.
The cycle is com
The valves thus fully reseated may then be un
locked or freed for rotation and for normal ma
3. In a vacuum machine for cans, the combina
tion of a housing enclosing a vacuum chamber
and having openings for the passage of cans
therethrough, valve seats in said housing adja
cent said openings, rotatable valves disposed and
upwardly movable in said seats for conveying
cans to and from said vacuum chamber, means
for rotating said valves, means self-contained in
said housing and including an electric motor for
lifting the valves from their seats, and electric
devices operable by engagement with one of said
valves while being lifted by said lifting means for
stopping operation of said electric motor when
said valves are in a predetermined lifted posi
tion.
4. In a vacuum machine for cans, the combina
tion of a housing enclosing a vacuum chamber
and having openings for the passage of cans
therethrough, valve seats connected with said
housing adjacent said openings, valves disposed
chine operation by manipulation of the locking and upwardly movable in said seats for conveying
handle I 09.
cans into and out of said chamber, means located
65
It will be recalled that an emergency switch -in said housing and including an electric motor
22I, has been included in the valve elevating and for removing the valves from their seats or for
valve lowering, starting and holding circuits. again returning them to fully seated position,
This is used to manually terminate the action of means for starting said motor to remove said
any of these circuits at any time before comple4 valves from or to return them to their seats. and
70 tion of their respective cycles. It is therefore a electric
devices for terminating operation of said 70
safety feature and by manually opening a circuit electric motor and hence stopping further seat- at this switch the valves can be brought to rest ing movement of said valves when the latter are
in any desired position whether they are being returned to fully seated position.
raised or lowered.
75
,
»
Itv is thought that the invention and many of
5. In a vacuum machine for cans, the combina
tion of a housing enclosing a vacuum chamber 75
2,138,815,
and having openings for the passage of cans
therethrough, valve seats connected with said
housing adjacent said openings, valves disposed
and upwardly movable in said seats for convey
ing cans into and out oi’ said chamber, ?ngers in
said valves for ejecting cans therefrom, cams ad
jacent said valves for actuating said ?ngers,
means self-contained in said housing for remov
ing the valves from their seats or for again re
10 turning them to fully seated position and for
moving the cams with the valves, and devices
engaging said cams for maintaining said ?ngers
in predetermined relation with said valves while
the latter are moved relative to their seats. .
15
6. In a vacuum can closing machine, the com
bination of a housing enclosing a vacuum cham
ber and having openings for the passage of cans
therethrough, can closing mechanism located in
said vacuum chamber for closing said cans in
20 vacuum, valve seats in said housing adjacent said
openings, rotatable valves disposed and upwardly
movable in said seats for conveying cans to and
from said closing mechanism, a device for dissi
pating the vacuum in said closing chamber, in
25 strumentalities for locking said valves against
rotation and in a predetermined position of their
cycle, means self-contained in said housing for
removing the‘valves from their seats or for again
returning them to fully seated position while so
30 locked and while said vacuum is dissipated from
said chamber, and electric devices operable by
said locking'instrumentalities for rendering the
7
electric devices including an electric motor and
starting and holding circuits for moving said
valves in their seats while said chamber is vac
uumized, elevator hoist means connected with
said valve, hoist electric devices including an elec
tric motor and starting and holding circuits for
operating said elevator hoist means to remove
said valves from their seats for lubricating and
cleaning when said chamber is not vacuumized
and to also return said valves to their seats, and
electric devices common to the starting and hold
ing circuits of both electric motors for selectively
rendering one of the latter inoperative.
10. In a vacuum machine for cans, the combi
nation of a housing having a valve seat, a valve
‘rotatably disposed in said seat and adapted to
con?ne a vacuum chamber, said valve presenting
cans for vacuumization in said chamber, and self
contained means within said housing and axially
disposed relative to said valve for lifting the latter 20
to a position clear of its seat.
ll. In a vacuum machine for cans, the combi
nation of a housing having a valve surrounding
seat, a valve disposed for vertical movement with
in and relative to said seat and adapted to con 25
fine a vacuum chamber, said valve being adapted
to introduce cans into said chamber for vacuum
izing therein, and means located in said housing
and operatively connected. to said valve for mov
ing the valve vertically relative to its seat to per 80
mit lubricating and cleaning.
' 12. In a vacuum machine for cans, the com
said can closing mechanism inoperable while the - bination of a housing enclosing a vacuum cham
ber and having an opening for the passage of
valves are locked.
35
'Z. In a vacuum machine for cans, the combina
tion of a housing having a valve seat, a valve ro
tatably disposed and upwardly movable in said
seat and adapted to con?ne a vacuum chamber,
said valve presenting cans for vacuumization in
40 said chamber, means self-contained in said hous
ing and including a rotatable elevator screw
mounted on the vertical axis of said valve and
anchored in said housing as a permanent part
thereof and rotatably loosely connected with the
45 valve for lifting it to a position clear of its seat,
and means for rotating said elevator screw when
said vacuum chamber is not under vacuum.
8. In a vacuum machine for cans, the combina
tion of a housing enclosing a vacuum chamber
50 and having openings for the passage of cans
therethrough, valve seats connected with said
housing adjacent said openings, valves disposed
and upwardly movable in said seats for conveying
cans to and from said' closing chamber, a device
for dissipating the vacuum in said closing cham
ber, means self-contained in the said housing for
removing the valves from their seats or for again
returning them to fully seated position while the
50
vacuum of said chamber is dissipated, means for
actuating said valve removing or said valve re
turning means, and manually operated electric
devices for stopping said actuating means to
arrest movement of said valves .at any desired
position in their path of travel during their re
moval from or return to their seats.
9. In a vacuum machine for cans, the combina
tion of a housing having valve seats, a valve mov
ably disposed in each seat and adapted to con?ne
a vacuum chamber, one of said valves presenting
{0 cans for vacuumization in said chamber, machine
I
cans therethrough, a valve surrounding seat con
35
nected with said housing adjacent said opening,
a valve movably disposed within said seat for
moving cans relative to said housing and said
vacuum chamber, and means located in said
housing anci- operatively connected to said valve 40
for elevating the valve from its seat and for there
after lowering it into fully seated position.
13. In a vacuum machine for cans, the com
bination of a housing enclosing a vacuum cham
ber and having openings for the passage of cans 45
therethrough, valve seats secured to said housing
adjacentsaid openings, rotatable valves disposed
in and upwardly movable from said seats for
conveying cans to and from said vacuum cham
ber, means Ior dissipating the vacuum in said 50
chamber, means self-contained in said housing
and including an electric motor for removing
the valves from their seats, and means operable
only after‘ said vacuum has been dissipated from
said chamber for e?ecting said valve removing 55
operation.
14. In a vacuum machine for cans, the com
bination of a housing enclosing a vacuum cham
ber and having openings for the passage of cans
therethrough, valve seats connected with said 60
housing adjacent said openings, rotatable valves
disposed in and vertically movable relative to said
seats for conveying cans into and out 0! said
chamber, instrumentalities for locking said valves
against rotation and in a predetermined position 65
of their cycle, and means self-contained in said
housing for moving the valves vertically from
their seats or for again returning them to fully
seated position while so locked.
ARCHIBOLD N. YORK. 70
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