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Патент USA US3083283

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March 26, 1963
E D’HOOGE
3,083,273
INSTALLATION FOR FULLY AUTOMATIC OPERATION IN LAUNDRY
AND OTHER PHYSICO-CHEMICAL PROCESSES, MAINLY
FOR WASHING MACHINES
"?led May 2, 1960
5 Sheets-Sheet 1
Emile /)'Ho05e
aéhamwgswx
ATTORNEijS
March 26, 1963
E. D'HOOGE
3,083,273
INSTALLATION FOR FULLY AUTOMATIC OPERATION IN LAUNDRY
AND OTHER PHYSICO-CHEMICAL PROCESSES, MAINLY
FOR WASHING MACHINES
Filed May 2, 1960
5 Sheets-Sheet 2
EmZ/e 0 Wooge.
ghwhré/w
March 26, 1963
3,083,273
E. D’HOOGE
INSTALLATION FOR FULLY AUTOMATIC OPERATION IN LAUNDRY
AND OTHER PHYSICO-CHEMICAL PROCESSES, MAINLY
FOR WASHING MACHINES
Filed May 2, 1960
5 Sheets-Sheet S
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ATTORNEEYS
March 26, 1963
.
E. D’HOOGE
3,083,273
INSTALLATION FOR FULLY AUTOMATIC OPERATION IN LAUNDRY
AND OTHER PHYSICO—Cl-IEMICAL PROCESSES, MAINLY
FOR WASHING MACHINES
Filed May 2, ‘1960
5 Sheets-Sheet 4
EVIL/d 0 Ill/005E.
?mJaf git?!
March 26, 1963
E. D’HOOGE
3,083,273
INSTALLATION FOR FULLY AUTOMATIC OPERATION IN LAUNDRY
AND OTHER PHYSICO-CHEMICAL PROCESSES, MAINLY
FOR WASHING MACHINES
Filed May 2, 1960
5 Sheets-Sheet 5
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ATTO I'LNELLS
United States Patent O ice
1
3&83273
Patented Mar. 26, 19,63
2
for introducing into and removing from the bath the
3 0%.‘),273
IN§TALLATION FOR lFULLY AUTOMATHC OPER
necessary liquids and chemicals, as well as with means
ATION IN LAUNDRY AND OTHER PHYSECO
CHEMICAL PRK‘JQESSES, MAENLY FOR WASH
perature. For actuating aforementioned devices, provi
for keeping at all times the bath at the required tem
sion must also be made for a system :of programming
which will determine the number, the order and the dura
tion of the successive phases of the treatment, and for
ENG MACHKNES
Emile D’Hoege, Ghent, Belgium, assigncr to Ateliers de
Construction Emile B’Hoogc SRRL, Ledeberg,
Belgium
operating the various means used in each one of these
Filed May 2, 196%, Scr. No. 26,273
Claims priority, application Belgium h/iay 12, 1959
5 Claims. (Cl. Nil-38)
The tendency toward automatic operation in all kinds
phases.
10
iI-f various duties must be performed by one and the
same installation, such as that of treating a variety of
articles, and/or treating the same kind of articles in dif
ferent ways, the system of automatic programming must
of technical industrial processes, and mainly in the chemi
cal and technological industries is gaining more and more
make it possible to preadjust the duration of successive
ground. This extension of automatism does not only 15 phases and of the Whole process, as well as the various
tend to liberate a considerable labor ‘force for more highly
treatments which are speci?c for each phase and the
skilled duties, but also leads to considerable progress
amount of products to be introduced at the proper time.
through the elimination of uncertainties resulting from
This however complicates matters considerably, con
the human factor, which fact makes it possible to conduct
sidering that for each ‘one of the successive phases it is
a process in a faultless way and in a manner which is 20 not only the kind and amount of product to be 'added
reproducible at any time, according to de?nite data which
which has to be determined, but also a combination of
have been carefully determined by previous theoretical
and experimental ‘analysis. These considerations also
operations each one of which can be chosen from ‘a given
number of possible operations.
apply to the industries which deal with the treatment of
It may ‘be needed for instance, in the course of one
textiles ‘and, among others, to laundries and ‘similar con 25 particular phase, to renew the bath before adding another
cerns, so that here too an effort has been made for de—
product, whereas in another phase such renewal is not
signing devices capable of ensuring fully automatic regu
necessary and it will do to add the new product to
lation. On account of their very nature, these industries
the old ‘bath. On the other hand, the amount of liquid
will most of the time have to deal with a large variety
in the washing trough and its temperature may have to
of products and articles which all need special treatment,
differ from one phase to the next.
so that the machines and their operation must be designed
On account of the very nature of this kind of business,
in view of a possibility of quick and easy change-over
and due to the fact that the staff employed therein is
from one automatic process to another which must fol
low an altogether different course. It is moreover highly
practically ignorant of anything concerning mechanics
and electricity, it is an essential requirement that the
desirable that the number and the variety of various proc 35 setting of the controls be extremely simple to perform
essing programs which can thus be established be as
and devoid of any special difficulty, to which must be
large as possible.
added the further imperative requirement that a wrong
In laundry processes for instance, the ?rst treatment
setting of some control or other must on no account lead
consists in letting the linen soak some time either in cold
40 to disaster. The installation must moreover be absolutely
or in tepid water in order to dissolve the stains caused
reliable and be built so as to resist not only the corrosive
by albuminoid substances such as blood. This is followed
action of certain gases and vapours, but also a certain
by one or more washing operations with various prod
amount of rough treatment,
ucts. According to whether the linen is more ‘or less
For ensuring smooth and troublefree working, some
soiled, the liquid used for the washing must be replaced
measure of visual checking must also be provided which
a certain number of times in order to avoid that the
will make it possible to ascertain at ‘a glance:
dirt which it contains should settle again onto the linen.
(l) The nature and duration of each of the successive
The actual washing is followed by a rinsing process the
phases of the running process and,
object of which is to clear the linen of the washing prod
(2) The time which has elapsed since the beginning of
ucts and of the dirt which is still contained therein. 50 the process in question.
Most of the time, this is done ?rst with warm water, then
These facilities are especially of great importance when
experimenting with a new process or the use of the new
with cold water, the number of rinsing baths needed
amounting to four or more. While linen must
i
moreover ‘ ‘ products. ‘It follows therefrom that a possibility should
be provided for interfering manually with a predeter
be bleached, with sodium hypochlorite ‘for instance, and
then bl-ued, usually with ultra marine blue, this to com 55 mined and preadjusted program, by extending, by short
ening, by repeating or by omitting one or several phases.
pensate for a certain yellowing of the linen caused by
Finally, another aim to be attained is to design the
the washing process and to thus give the linen a fresher
whole of the controlling devices as a single compact
aspect.
unit which can be quickly and easily ?tted and connected
In mechanized laundries, all these operations are per
formed in a single machine, the complete process taking 60 to existing washing machines.
All these conditions are ful?lled by the controlling
between 30 and 60 minutes for white linen ‘and from 35
mechanism to which the preference has been given in the
to 45 minutes for coloured linen.
present invention and which is characterized by the fact
This example shows that in such processes a certain
that it comprises at least: a part which, during normal
number of treatments of different length have to be ap
operation, moves with uniform speed; a distributing de
65
plied, using various chemicals.
vice comprising a certain number of ?xed switching points,
The object of the present invention is‘ to design, in view
and also coupling devices which can be ?tted in such Way
of such like processes, an installation by means of which
it will be possible to perform the entire process in an
to or onto aforesaid part which moves with uniform speed,
that this part is temporarily connected at certain pre
altogether automatic way.
determined time intervals to aforesaid distributing device
In order to be able to perform its work altogether 70 in order to move the latter to its next switching point.
automatically, the machine must be provided with devices
Aforesaid distributing device is connected in such way
spasms
3
4
to the devices which control the process, that in each
one of its positions a predetermined combination of afore
simpli?ed way, the constant speed timing disc for adjust
ing the duration of successive phases, part of the edge
said controlling devices, corresponding to the particular
process which has been chosen, is being operated in a
of aforesaid disc having been omitted for illustrating
the way in which the plugs screwed into this disc work
predetermined order.
in conjunction with the distributing device and the
q
The distributing device may be either a pneumatic
auxiliary controlling devices;
‘FIG. 5 is a diagram explaining the setting of the pro
gram selector, showing by way of example, a given pro
gram for a washing cycle encountered in actual practice;
‘FIG. 6 shows, but in a still simpler way, the disc rep
tric switching device‘ by means of which the various de 10
resented in FIG. 4, onto which an indicating dial has been
vices can be operated‘ electrically or electro-magnetically.
?tted, which dial is divided into sectors corresponding to
In the same wat, the coupling between the part which
‘the position of the various coupling devices and mention
moves‘ with uniform speed and the distributing device
at the same time the succession of phases such as they
can be operated by electrical, pneumatic or hydraulic
or hydraulic system, so that the devices controlling the
process are themselves operated either pneumatically or
hydraulically, but preference is given however to an elec
means, as. well as in a purely mechanical way.
have been set according to the program represented in ‘
According to another characteristic feature of the
present invention, one or more further switching de»
vices are inserted in the trajectory of the coupling devices,
so that, during the time interval in which the part move
FIG. 5;
FIG. 7 is ‘a side view of a diagrammatic representa
tion of the controlling system conforming to the present
invention, showing at the same time the inlet and outlet
ing with uniform speed is coupled to the distributing de 20 pipes and valves, as well as the pneumatic operation of
the latter, and the funnel with the cups for chemicals
vice by means of one of the coupling devices, the actual
coupling device actuates simultaneously one or several of
mounted on top;
aforesaid auxiliary switching devices. To this effect, use
can be made of distinct coupling devices of various forms
and dimensions which, when they, act as coupling ele~
ments, operate various combinations of aforesaid auxiliary
switching devices, in accordance with aforesaid forms and
dimensions. Preferably, one of these auxiliary switch
Finally FIG. 8 is a wiring diagram of the electrical
part of the controlling device.
ing devices is being operated while the distributing de
shown in this ?gure as well as in FIG. 7, this installation
comprises a switching box 1 onto which is also ?tted
the setting disc 2 for adjusting the duration of the suc
vice passes to its next position, and this as long as the
switching operation lasts, ‘aforesaid switching device then
FIGURE 1 shows by way of example a washing ma
chine to which has been ?tted a system conforming to
the present invention for automatically controlling the
washing process according to a pre-set program. As
actingin such way on the controlling device that the
latter is rendered inoperative during this time. One or
cessive phases of the process, as well as the program so
used, can be made to conrtol certain operations, such as
preferably of galvanized sheet iron, there are several (six
the emptying of the washing trough, which, if they must
on the ?gure) small cups 5 made of plastics and mounted
be performed, must be ?nished before the beginning of a
new phase of the treatment. ‘Finally, one of aforesaid
auxiliary switching devices can be used for ending the
chemicals are introduced which will have to be added
lector 3 and the funnel 4 for introducing the chemicals,
connected by a pipe 6 to the bottom of the outer trough,
more‘ of the further switching devices which may or may
not be operated during the ‘travel of the distributing de 35 of the washing machine.
Above the funnel 4 which is made of some corrosion
vice, this operation or non~operation depending on the
resistant material, such as stainless steel or plastics, but
shape and the dimension of the coupling devices being
on pivots supported by Bakelite brackets and into which,
at the beginning of each washing process, the various
in succession to the washing bath during the various phases
of the process. Each of these cups is normally kept in
According to another characteristic feature of the 115 equilibrium by a locking device which can be released by
an electro-magnet 7 so as to tip over and thus pour its
present invention, the distributing device is coupled to
whole process and, if found desirable, for switching-on
an acoustic warning signal.
contents into the funnel.
Each time when one of these
the controlling system-through a program selector by
means of which it is possible to pre-set at will, the various
controls which must be operated in each position of the
cups is tipped and thus pours its contents into the funnel,
a certain amount of water is made to ?ow into the latter
distributing device, according to the requirements of the
so as to wash away the chemical in question and to intro
duce it into the washing trough. Each one of these elec—
goods which are being treated.
tro-magnets 7, marked in, FIGS. 7 and 8 by the Roman
'For easy introduction of the necessary chemicals, the
?gures ii to VI, can thus, as will be explained in fuller dc
machine conforming to the present invention, is ?tted
tail below, be operated individually at predetermined
with a funnel of corrosion-free material, connected to the
washing trough and on top of which there is a set of small 55 times by the program selector working in conjunction
with the setting disc so as to introduce at the proper mo
containers for the various chemicals, which containers
ment the required amount of chemicals into the cycle,
can be tipped-over by means of an electro-magnetic
aforesaid products being referred to by the same corre
trigger so as to pour their content into the funnel.
Aforesaid characteristic features, as well as numerous
sponding Roman ?gures in FIG. 5.
,
As shown more particularly in FIGURE 7, the wash
constructional features of the installation conforming to 60
ing machine comprises a cold water inlet 8, a warm water
the present invention, will appear more clearly from the
inlet 9 and a steam inlet 10, each of these inlets being;
description of an embodiment, given below by way of ex
ample with reference to the appended drawings, of which:
also controlled by a valve 11—-12~—13 respectively. Each
FIG. 1 is a simpli?ed, diagrammatic perspective view
of these valves is in turn operated by compressed air via,
of a complete machine, such as a washing machine, to 65 the pipes '15—14—16 respectively each of which is con~
which the control system conforming to the present in
trolled by a three-way cock 18—17—‘19 respectively 0p
vention has been applied and connected;
erated by electro-magnets, also shown in the diagram of
‘FIG. 2 represents on a larger scale a perspective front
FIG. 8. The drain pipe 20 of the machine is normally
view of the switchbox with timing device and program
kept closed by the compressed air cylinder 21, connected
selector, which is part of the controlling device conform 70 by a pipe 22 controlled by a three-way cock 23 actuated
ing to the present invention;
:FIG. 3 is a cross-section of the timing device with
the distribution device and the auxiliary controlling de
vices;
FIG. 4 is a front view representing in a very much
by an electromagnet, to a source of compressed air which
has not been represented. When the exciting current
which controls aforesaid three-way cock 23 is switched on,
the latter releases the air from the pressure cylinder 21,
which causes the drain pipe 21 to open rapidly. As soon _
3,083,273
5
6
as the exciting current of aforesaid electro-magnet is
switched-off, the three-way cock 23 returns to its original
position, the result of which is that pipe 22 is again put
under pressure and that aforesaid drain opening 20 is
closed.
other physics-chemical process to which the system con
forming to the present invention can also be applied, quite
a number of other combinations and possibilities can
arise, which can however be controlled in an altogether
similar way according to a de?nite pre-set program.
In order to adjust the liquid level in the washing tub,
The mechanism used for adjusting the duration of the
the machine is also provided with a float controlled device
successive phases of the process, i.e. the timing device
24- connected to aforesaid washing tub by pipe 36 and
which is partly visible in FIGS. 1 and 2, is represented
?tted in such way that it is possible to adjust the amount
separately in vertical cross-section in FIG. 3. This mecha
of liquid contained in the tub to two different levels. 10 nism comprises ?rst of all a driving device revolving at a
Float 25 is fastened to the end of the float rod 26 which
predetermined constant speed, ‘such as synchronous motor
carries two stop rings 27 and 23 respectively, which rings
37, connected by a worm gear 38—39 to a shaft 40 re
can be set for adjustment of the lower level and of the
volvingin a ?xed bearing 42.. The rotational speed of the
higher level respectively. Aforesaid stop rings work in
conjunction with a lever 29 pivoting at 30, so that when
the float has come down to the lower level, stop 27 pushes
down lever 29, causing the latter to operate a micro
switch 32 mounted below the lever, whereas when the
upper level has been reached, it is stop 28 which acts on
the latter and pushes it upwards, thus operating a micro
switch 3-1 mounted above aforesaid lever.
This same FIG. 7 also shows in a very diagrammatic
way, thermostatic switches 33, '34 and 35 located in the
15
motor, as well as the reduction ratio are calculated in
such way that aforesaid shaft 40 makes one complete revo
lution in a predetermined time equal to the longest dura
tion of a complete washing process, i.e. in exactly sixty
minutes in the present illustrative example. Near its
other end, aforesaid shaft 40 carries a part 2, generally
shaped as a circular disc, which can turn loosely on this
shaft but can also be rigidly connected to the latter when
it is clamped between a knurled nut 44 secrewed onto the
end of the shaft, and a ?ange 45 fastened to the shaft.
washing tub of the machine, aforesaid thermostats being
Aforesaid disc-shaped part, i.e. the setting disc 2 which is
set to different temperatures of 40°, 60°, 90° C. respec 25 also represented in FIGS. 1 and 2, has near its circum
tively for instance, i.e. in such way that the contacts
ference a certain number (sixty in this particular instance)
marked by the same ?gures in FIG. 8, close as soon as
of equally spaced tapped holes 46 whose centers lie on a
the temperature of the bath exceeds 40", 60°, 90", re
circumference which is concentric with the axis of the
spectively.
disc. As in this particular example one complete revolu~
Thus, the washing machine which has been chosen by
tion of the shaft is effected in sixty minutes, it is self-evi
way of example for illustrating an embodiment of the
dent that the interval comprised between two adjacent
present invention, is provided with all the necessary con
holes will be travelled-through exactly in one minute.
trols for ensuring automatically the regular course of a
Plug-s 47 can be introduced and fastened into aforesaid
complete washing cycle in a number of predetermined
holes 46, for instance by screwing, so that, while the disc
phases of predetermined durations, the addition of the
2 is turning, these plugs come successively into contact
various washing products, the introduction of either cold
with a small sprocket wheel 48 provided with as many
or warm water, the heating by steam to a predetermined
teeth as there are phases in the complete process, i.e. ten
temperature and the emptying of the washing tub, all ac
in this particular instance. Aforesaid plugs act in such
cording to a de?nite pre-set program.
way on the small sprocket wheel that the latter moves
This does not exclude numerous further possibilities
exactly by one tooth at each passage of a plug.
which are all comprised within the scope of the present in
Immediately below and behind the small sprocket wheel
vention. So for instance it is possible to use other means
43, the actuating parts of one or more micro-switches
of compression than compressed air, to design an electrical
49, 50, 51 mounted one behind the other are located in
control by means of servo-motors or otherwise, or also a
the path of aforesaid plugs 47. The coupling between disc
direct control by purely mechanical means. It is evident
2 and the sprocket wheel 48 is effected by means of dis
on the other hand, that the various devices which have
similar plugs which, according to their length, actuate
been mentioned above may differ with respect to their
during their transit and whilst engaging the sprocket wheel
shape, their dimensions and their relative positions as
in question, one, two or three of the micro-switches. For
represented in the ?gures.
easy identi?cation of the plugs of di?erent lengths, the
The following account will comprise a description of
latter are provided in front i.e. on their heads, with clearly '
50
the various means used for actuating aforementioned con
visible markings, being for instance painted in different
trolling devices according to a de?nite pre-set program.
colours. As will be explained in the ‘description given
This account will be based on an example of embodiment
below, the short plugs which only come into contact with
which offers the following possibilities:
'
Maximum number of phases included in the treatment:
10.
Full time taken by a complete cycle: max. 60 minutes.
micro-switch 4-9, merely disconnect the controlling device
during the transit from one phase to the next; the plugs of
medium length, which come into contact with the two
length of time of approximately 45 seconds.
micro-switches 49 and 50, also trigger the drainage of the
bath, whereas the long plugs furthermore control the
devices which stop the whole washing process and give
rise to an acoustic warning signal. The small sprocket
the following alternatives:
(1) Leaving the bath as it is,
instance, consists of a small ?xed base plate 53 of some
Shortest time interval: 1 minute.
-
At the end of each phase, the control is stopped for a
During this stop, the user is given free choice between 60 wheel 48 is fastened to the shaft 52 of a ten position
‘(2) Draining the bath,
(3) Terminating the whole process and switching-on
an acoustic warning signal.
In each one of the phases of the process, ehere is a choice
between the following possibilities:
(a) Cold or warm water.
(b) High or low level in the tub.
(c) No steam heating, or steam heating up to 40°,
60° or 90° C.
(d) Six different washing products (I . . . VI).
On the other hand, it will be appreciated that for
switching or distributing device which, in this particular
insulating material, carrying concentrically to the shaft 52,
65 on the one hand a continuous slip ring 54, see FIG. 4,
and on the other hand a circle of mutually insulated con
tact studs 55. A contact bloc or arm 56 fastened to
shaft 52 carries two brush-holders 57—58 ?tted with
spring-loaded carbon brushes 60—61 respectively, of
70 which one '(viz.~ brush 61) is kept into contact with the
slip-ring 54, whereas the other (viz. brush 60) comes suc
cessively into contact with each one of of the contact
studs 55 corresponding to one of the ten positions of the
distributing device. The contact arm 56 is made of insulat
ing material, while the two carbon brushes 60 and 61 are
3,083,273
|
7
,
,
connected electrically together by any suitable means
which need not be described, so that when the little
sprocket wheel 48 has made one complete revolution, the
slip ring has been put in succession into contact with each
one of the separate contact studs arranged on the outer
circumference. The angular position of contact arm 56
with respect to the little sprocket wheel 48 is such that
brush 60 is each time centered exactly onto one of the
contact studs'SS before and after one of the plugs 47
has been moving the sprocket wheel 48 by one tooth.
10
As during the rotation of the small sprocket wheel
there is always at least one of the micro-switches 49—50
and 51 which is actuated, the electrical connection can be
made as follows: as can be seen in the wiring diagram of
one particular row is not switched-on, the ?ve ?rst
switches of aforesaid row are mutually independent. This
is necessary in order to avoid that two or more of the
vertical control leads, each of which is in a measure to
actuate a control device, might be interconnected in a
permanent way, which could give rise to the drawback
that the corresponding controlling functions would always
be effected together even when this is not required. So
for instance, if in the course of operation 1 the ?rst and
second switches were combined, and if in operation 4 the
second and third switches were combined, the result would
be that in both cases in a combination of the functions
corresponding to the ?rst, second and third switches would
be obtained.
This same precautionary measure is how
FIG. 8, during the whole displacement of brush 60, the 15 ever not strictly needed in the six last columns, consider
transit from one contact stud 55 to next is performed in
the absence of current, thereby preventing all sparking.
By unscrewing l'llllt t4», the setting disc 2 can be made
free of shaft 46, after which aforesaid disc can be dis~
ing that, in a general way, not more than one chemical
will be added in the same phase, so that there will never
be more than one of the switches which will be “on” in
each row. However, if on account of the design of the
is eifected by means of a nut 62 screwed onto a projec
mechanism for introducing the chemicals ‘or of the partic
ular nature of the physical process, the necessity should
tion of aforesaid disc, this nut serving at the same time
arise in certain cases to actuate several times a given con
placed by hand independently of the timing device, which
trolling device, each time in combination with another
controlling device, the necessary devices should also be
the setting disc 2‘. Between aforesaid transparent cover
63 and aforesaid disc 2, a dial made of cardboard or of 25 provided here for preventing that the contacts of each row
be mutually disconnected by means of individual pairs of
some similar material can be clamped, this dial having
to clamp a cover 63 of some transparent material onto
contacts at the relay belonging to that row.
previously been subdivided, by drawing or otherwise,
After all, it is not necessary to provide a complete set
into sectors as is represented in particular in FIG. 6, this
of switches in each row. If a switch is omitted here and
division corresponding to the position of the plugs in the
peripheral holes and thus giving a visual indication of the 30 there, and more particularly in the columns referring to
the chemicals, as shown for instance in FIGS. 2 and 5,
Way in which the duration of the successive phases of
the possibilities of combination are certainly limited
the process has been adjusted. It may be convenient
thereby, but this will generally not prove to be a serious
moreover to provide the various sectors of the dial with
handicap in practice.
.
a summary indication of the various operations which take
place during the various phases. Such indicating dials 35 FIGURE 5 shows in a diagrammatic way, the position
of the switches in connection with a practical washing
can be prepared and printed beforehand for the most
process, while FIG. 6 shows the corresponding positions
current processes, and handed over to the user.
of the plugs 47 on the setting disc 2. FIGURE 6 also
The selection of the various components of each of the
shows the indicator dial which has already been men
ten possible phases of the process is made by means of
tioned and which is divided into sectors each of which
the program selector 3 which, as shown more clearly
bears a brief indication of the operation being performed
in FIG. 2, comprises a number of switches arranged in
at the time. This setting corresponds to the following
ten rows [and eleven columns in the instance chosen for
program:
this example. The switches of each row belong to the
corresponding phase of the process, whereas the switches
of a same column are all connected with a same function. 45
Operation
This is represented diagrammatically in FIG. 5, where
Water
supply
the ?rst column refers to the hot water supply, the second
column to the highest level of liquid in the washing tub,
the third, fourth, and ?fth columns to the steam heating
to temperatures of 40°, 60° and 90° C. respectively,
and columns 6 to ll to the six different chemicals con
tained in the little cups mounted on top of the funnel. It _
no.
name
Level
Steam
Time in
supplied Chemi- Min.
up to,
cal
utes
° C.
Soaking. _ . _
1st lather.___
2nd lather..
.
Rinsing. __..
Bleaching..
should be noted at this time, that this diagram is designed
Rinsing. - . _ _
in such way that if the switch which controls the hot wa
Rinsing. _.._
Blueing. ..-
ter supply is not switched-on, only cold Water will be
supplied until the predetermined level has been reached,
Stop...
whilst if aforesaid hot water switch is “on,” the cold wa
ter supply is cut-off. Similarly, it is always the lower
level which applies unless the switch controlling the higher
Stop ...... _.
level is “on.”
60
‘Most of the time, numerous processes such as the one
All these switches are single pole. All switches in a
to which the above table refers, will take less than 60'
same column are connected by one of their contacts and
over a common lead to the controlling device correspond
ing to their function.
minutes. In order to make it possible to start a new
cycle as soon as the preceding one, which lasted only 50
minutes, is ?nished, the last part of rotation correspond
When a row of switches must be switched-on, i.e. at 65 ing to the sector marked “stop” in FIGURE 6‘, must be
the beginning of the phase corresponding to that row, a
travelled through at an accelerated rate. This can be ob
voltage is applied to the other contact of each one of
these switches by means of a relay which closes its contacts
tained, as was already described above, by disconnecting
the setting disc from the driving shaft and then moving
during this particular phase. The switches of columns
it ‘by hand. Although, as in the present example, the
1 to 5 each have been their own pair of contacts at the re 70 complete process comprises less than ten phases, it is
lay belonging to their town row, whereas the switches of
the six remaining columns, which refer to the introduc
tion of the six chemicals, have altogether only one pair
necessary all the same to always insert ten plugs into the
setting disc, because, when the latter has made one com
plete revolution, the distributing device will also have
returned to ‘its original position. The plugs which are
result of this disposition is that as long as-the relay of 75 not needed for the process which is being carried-out,
of contacts at the relay belonging to their row.
The
3,083,273
can be screwed ‘into any of the holes of that part of the
disc which is not being used.
The operation of the installation which has thus been
equipped, will now be described in detail with reference
to the diagram of FIG. 8. This diagram embraces the
following controlling devices which have already been
mentioned: the valves 18, 17, 1-9 vfor controlling the cold
C to release, thus cutting-01f the current supply of the
switches belonging to the corresponding row of the pro
gram selector, as 'well as the controlling devices connected
to these switches. If the plug in question was a short
one, nothing else happens until, ‘after a time interval of
approximately 45 seconds, the distributor has passed onto
its next position and switch 49 has come back to its start
ing point. If the plug was one of the medium length, a
water, the warm water and the steam supply respectively;
voltage is also applied by microswitch 50. to the valve 23
the ?oat contacts 31——32 respectively for high and for
low levels in the washing tub; the thenmo‘staltic contact 10 which controls the drainage, so that the washing tub is
emptied in a very short time, after which the next phase
devices 33, 34, 35; the electromagnets 7 which control
of the process can begin.
the cups containing the chemicals; the synchronous motor
If when one of the relays C is energized through a
37; the micro-switches 49, 50 and 51 of which the one
marked 49 operates ‘at each passage of one phase to the
closed switch in the corresponding row, this closes the
next, whilst the two others can only be operated by plugs 15 actuating circuit of device 18 which controls the addition
of su?icient length; and ?nally the ten-position distribut
of hot water, so that clean hot water will be fed into the
ing device 54—55 actuated by the setting disc by means
processing tub at the same time that relay R2 connected
of aforesaid plugs. The diagram in question also em
in parallel with the device 18 will be energized, the result
braces the following auxiliary items: the rnain transformer
being that: (1), the synchronous motor 37 is stopped and
VT2; the bell transformer t2 to which is connected a gen 20 (2), the device 17 which controls the admission of cold
erator of acoustic signals;,a main switch 11; a door- and
water is thereby locked. This condition lasts until the
safety-switch a’; the auxiliary relays R1, R2, R3, R4, each
liquid level in the processing has reached the lower pre
determined level. If it is the second switch in the row
r1, r2, r3, r4; the auxiliary relays C1, C2, . . . C10, each
which has been closed, it is relay R4 which will be ener
one of which is associated with one of the positions of 25 gized, thus causing contact 14 to close. The circuit con~
the distributing device and thus also with one of the rows
trolling either the cold water or the warm water inlet
then no longer depends on microswitch 32, but on micro
of the program selector, whereby one of them, (viz. C3)
is represented in FIG. 8 with all its contacts. In order
switch 31 instead, so that the in?ow is not cut-off before
?tted with one or more contacts marked respectively
to facilitate the reading of this diagram, the contacts
have most of the time not been represented near the coils
but located at convenient places in the circuit; the mean
ing of the symbols used for these contacts should be
noted; all contacts which are normally open are repre
sented by two short parallel lines, whereas the contacts
which are normally closed are represented by two short
parallel lines, themselves crossed by a short oblique line.
‘For starting the machine, the ?rst thing to do is to close
the main switch h, and then to make sure that all doors
fitted with a door contact are properly closed. If every
the level in the processing tub has risen su?iciently for
switch 31 to be actuated by the stem of the ?oat.
When one of the switches in the third, fourth or ?fth
column is closed, current ?ows through the thermo
contacts 33, 34 or 35 to the device 319 controlling the ad
mission of the steam, which at the same time brings relay
R3 into action, so that as long as steam is admitted, the
synchronous motor is at a standstill while aforesaid inlet
of steam goes on until the processing bath has reached the
required temperature and the thermostatic switch opens.
If two of the three switches close their contacts at the
thing is in order in that respect, the voltage supplied at 40 same time, it is evident that it is the higher of both cor~
the output terminals L1 and L2 of the mains transformer
responding temperatures which must be reached before
VTz will be applied through switch It and contact d, the
the supply of steam is cut-off, apart from which fact
normally closed contact of micro-switch 51 and the nor
aforesaid inflow of steam depends on the position of
mally closed contacts r1, r2, r3 to the synchronous motor
microswitch 32, it being understood however that this
37 which thus begins to run. This same voltage is also 45 in?ow cannot take place if the liquid contained in the
applied through the normally closed microswitch 49 and
processing tub has not reached at least the lower pre*
the distributing device S4-—55, which at this instant is in
determined level.
position 1, to relay C1 whose armature is thereby at
When one of the switches in the six columns referring
tracted and closes its contacts. Thus, the combination of
to the addition of chemicals is closed, the corresponding
controlling functions needed for phase 1 of the process 50 electro-magnet 7 is energized and the contents of the
has been established. If it be assumed that for this ?rst
cup associated therewith is poured into the funnel. This
phase none of the switches are closed, this will however
also can not take place however, at least as far as the
not prevent valve 17 which controls the cold water sup
chemicals IV, V and VI are concerned, unless the liquid
ply to be operated through a normally closed contact r2,
contained in the processing tub has reached at least the
provided that the ?oat contact 32 is closed, i.e. provided 55 lower predetermined level.
When at the end of the processing phase, a long
ihatlthe ?oat is still lower than the predetermined lower
plug 47 actuates simultaneously microswitches 49-50
Connected in parallel with the device 17, there is an
and 51 the current supply to the synchronous motor 37
auxiliary relay R1 to which the voltage is thus also ap
is cut-off, whereas voltage is applied to the bell trans
plied and which opens its contact r1. This stops the 60 former t2, with the result that the device “S” emits an
synchronous motor as well as the rotation of the setting
acoustic signal until the main switch It has been opened.
disc as long as the ?lling lasts, so that the time used for
What I claim is:
?lling the tub does not count for the determination of
1. A timer device for timing the operation of a num
the duration of the phases. The same applies if it is the
ber of relay controlled devices, said device comprising
warm water supply or the steam supply which is opened 65 a disc having a plurality of circumferentially spaced holes,
instead of the cold water supply.
coupling elements carried in some‘ of said holes, means
As soon as the required level has been reached, so that
rotating said disc at a constant speed, a group of switches,
lever 29 (FIGURE 7) is no longer held downward by
means supporting said switches alongside said disc in a
the stop-ring 27, microswitch 32 returns to its position
position wherein said switches lie in the path of movement
of rest, the addition of cold water ceases and relay R1 70 of said coupling elements for actuating said switches, an—
is released, which starts the synchronous motor again.
other switch having a rotary arm element, a plate, means
When the predetermined time for the-?rst phase has
supporting said plate in a ?xed position alongside said
elapsed, or in a general way, when a phase has come to
rotary arm element, said plate containing a slip ring con~
an end, it is ?rst of all microswitch 49 which is actuated
centric with the axis of rotation of said rotary arm ele
by the plug 47 in operation at the time. This causes relay 75 ment, and a plurality of circumferentially spaced contacts
eve .
8,083,273
11
12
disposed radially outwardly of said slip ring, a conductor
at least one switch of said group of switches is actu~
‘brush carried by said rotary arm element ‘and con
ated during each movement of the second-mentioned brush
conductor from a position of engagement with one of said
contacts to a'position of engagement with the next suc
ceeding contact, said switch having a make contact which
tinuously engaging said slip ring, another conductor brush
carried by said rotary arm element and ‘adapted ‘to engage
said contacts, a toothed sprocket wheel operatively con
nected to said rotary arm element, means supporting said
sprocket wheel adjacent said disc in a position wherein
the teeth on said sprocket wheel lie in the path of move
ment of said coupling elements whereby said coupling
elements engage said teeth for rotating said sprocket
wheel, a source of electricity, a plurality of controlling
relays, means electrically connecting said brush conduc
tors to each other and to said source, and means electri
cally connecting’each-of said contacts with a different one
of said controlling ‘relays.
’
is connected to said source and to the make contacts of
each of said controlling relays.
5. A timer device in accordance with claim 2 wherein
said controlling relays are connected to said contacts ‘in
such manner that said controlling relays are operated in ,
predetermined sequence.
References Cited in the ?le of this patent
UNITED STATES PATENTS
15
2. A time device in accordance with claim 1 wherein
each of said controlling relays includes ‘a plurality of
make contacts which are connected to said source by
means of ‘another manually actuated make‘contact.
3. A timer device in accordance with claim 2 wherein 20
said manually actuated make contacts are arranged in a
plurality of rows ‘and columns, the ‘contacts in each row
being connected to ‘the same cont-rolling relay, the con
tacts in each column being connected to the same con
trolled device.
.
4. A timer device 3in accordance with claim 2 wherein
25
2,199,775
Bassett _______________ __ May 7, 1940
2,855,476
Garrard ____ __- _________ .. Oct. 7, 1958
2,861,138
Simonsson et al ____ __-_-__ Nov. 18, 1958
2,909,626
Enssle _______ __' ______ __ Oct. 20, 1959
2,928,911
Willard _______ __> ____ _-__ Mar. 15,1960
2,939,336
Hetzer ___r__-_ _________ __ June 7, 1960
424,331
7 Great Britain _________ __ Feb. 15, 1935
590,899
Great Britain _________ ..- July ‘31, 1947
FOREIGN PATENTS
480,116
Canada _______________ __ Jan. 8, 1952
743,786
Great Britain _________ __ Jan. 25, 1956
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