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Патент USA US3028470

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April 3, 1962
3,028,457
F. c. JONES
SEQUENTIAL TIMER
Filed May 24, 1957
4 Sheets-Sheet 1
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April 3, 1962
F. C. JONES
3,028,457
SEQUENTIAL TIMER
Filed May 24, 1957
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April 3, 1962
F. c. JONES
3,028,457
SEQUENTIAL TIMER
Filed May 24, 1957
4 Sheets-Sheet 3
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April 3, 1962
F. c. JONES
3,028,457
SEQUENTIAL TIMER
Filed May 24, 1957
4 Sheets-Sheet 4
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United States Patent
ice
1
Patented Apr. 3, 1962
2
FIG, 4 is a view taken on the line 4-4 of FIG. 3 and
3,028,457
looking into the timer mechanism from the top thereof;
SEQUENTIAL TIMER
Frederic C. Jones, Decatur, 111., assignor to Borg-Warner
Corporation, Chicago, 111., a corporation of Illinois
Filed May 24, 1957, Ser. No. 661,387
7 Claims.
3,628,457
(Cl. 200—38)
FIG. 5 is a cross sectional view taken on theline 5-5
of FIG. 1;
FIG. 6 is an end elevational view of the electrical con
tacts of the timer;
FIG. 7 is a top plan view of the electrical contacts;
FIG. 8 is a diagrammatic view of the cam pro?le of
the cam board 16; and,
FIG. 9 is a diagrammatic illustration of the wiring
system for an automatic clothes washing machine using
'
The present invention relates to a linearly arranged
sequential timer operable automatically to control various
functions of an automatic laundry machine.
In general, the sequential timer ofythe present inven
tion represents an improvement of the“ timer disclosed in
US. Patent No. 2,641,661, Lateral Timer Switch, issued
vto G. O. Puerner et al. on June 9, 1953, and US. patent
the sequential timer contemplated by this invention.
and patent application relate generally to one wherein a
upwardly from the cover C.
Referring to FIG. 1 there is disclosed an automatic
washing machine designated by the letter A and com
application Serial No. 262,760, ?led December 21, 1951, 15 prising ingeneral a cabinet B which houses the entire
mechanism and control system therefor and which may
now abandoned, by Joseph M. Gartner, entitled Sequen
include a cover C, a front panel D, side panels E and F,
tial Controller.
'
and a control panel G forming a part of and projecting
The controllers disclosed in the above identi?ed patent
The cover Cv is provided
carriage supporting a plurality of pairs of contacts is 20 with a hinged lid H through which clothes may be intro
duced into the machine. Thehinged lid H is so dis~
moved along a linear path by the engagement of the car
posed with respect to the openings in the cover C that
riage with a lead screw driven by an electric motor.
it will be flush with the surface of the cover when it is
Current is supplied to the contacts through trolleys en
in its closed position.
gageable with and slidable along corresponding stationary
On the left hand side of the control panel G there is dis
bus bars. The pairs of contacts are actuated by the co 25
posed a control switch 10 which provides a means for
operation between cam followers integral with at least one
normally selectively regulating the operation of an auto—
contact between each pair of contacts and corresponding
stationary, linearly arranged cam surfaces disposed be
matic temperature mixing valve (not shown) normally
forming a part of the water inlet assembly (not‘shown).
tween the bus bars. The cams, formed with a predeter
On the right hand side of the control panel G there is
mined contour, are linearly transversed by the followers, 30
disposed a control knob 12 forming a part of a sequen~
thus actuating the contacts or switches in a predetermined
tial control 13 and which provides a means for normally
sequence. Means are also provided for disengaging the
carriage from the lead screw and for disengaging the fol
operating said switch controller, this operation to be
lowers from the cam surfaces so that the carriage may be
described in more detail hereinafter. The length of the
washing cycle may be predetermined and set within cer
tain limits by the manual adjustment of the control knob
moved manually back and forth along the linearly path
normally transversed by the carriage, thus making it pos
sible to set the carriage for automatic movement by the
lead screw from any desired point along the linear path.
12 in a manner to be described in detail hereinafter.
The sequential control 13 contemplated by this inven—
tion comprises, in general, a housing 14 of a generally
rectangular shape; a stationary electrical switch contact
block 15; a linearly movable cam board 16; a lead screw
17 driven by a constant speed electric motor 18; a
‘While the linear timer disclosed in the patent and in
the patent application has enjoyed considerable commer
cial success, it has one major drawback and this drawback
is the use of the trolleys to transfer current to and from
the plurality of contacts to the bus bar. As the trolleys
“clutch” means 19 for moving said cam board 16 out of
are moved linearly across the bus bars there is a con
engagement with said electrical contact block 15 whereby
the cam board 16 may be set at any predetermined posi
siderable amount of heat produced, due primarily to un
controllable arcing between the trolleys and the bus bars. 45 tion on the cycle; and a water ?ll control cam 29.
The housing 14 comprises a front wall 22, a rear wall
Consequently, the current load which may be transferred
23, end walls 24 and 25 and top and bottom walls 26 and
from the bus bars to the contacts and back to the bus bars
27. Fixedly secured to the front wall 22 of the housing
is quite limited since the higher the amperage of the cur
rent ?owing between these elements, the greater is the 50 are a plurality of projecting brackets 28, 29 ‘and 30 re
heat produced.
spectively provided with slots 32, 33 and 34, these slots
being adapted to receive bolts and nuts suitably carried
An object of the present invention, therefore, is to pro
by adjacent portions of the machine cabinet to which the
vide an improved linear timer and this object is obtained
sequential controller is affixed.
by eliminating the trolleys from the timer switch disclosed
in the above identi?ed patent and application.
The electric motor 18 has a drive shaft ‘35 projecting
55
Thus, the present invention comprises a timer having
into the wall 25 of the housing 14 and upon it there is
a plurality of stationary electrical contacts provided with
mounted a pinion gear 36 adapted for driving engage
depending portions, and a cam board which is moved
ment with a driven gear 37 mounted adjacent an end por
linearly across said plurality of contacts to engage said
tion of the lead screw 17. The particular speed at which
depending'portions and thereby make and break said plu
rality of contacts.
the cam board 16 moves across the electrical contact
,
’
Other features and advantages of the present invention‘
will become more apparent from a study of the appended
60
board 15 may be changed by merely changing the size
of the pinion 36 and/or the driven gear 37.
The cam board 16 is mounted in the housing 14 for
speci?cation and drawings wherein like elements are desig
linear movement therein and is mounted upon a plate 38
nated by like reference numerals and in which:
65 having tongues or projections 39 adapted to project into
FIG. 1 is a perspective view of an automatic clothes
slots 40 provided in the cam board 16. Mounted on the
washing machine which embodies the sequential timer of
projections 39 ‘of the plate 38 by means of pins 42 ‘are
the present invention;
‘
rollers 43 which ride in slots 44 in the bottom and top
FIG. 2 is an elevational view, partially broken away,
walls 27 and 26 of the housing 14. A control rod 45
showing the indicating dial of the sequential timer;
70 projects through a longitudinal slot 46 in the front wall
FIG. 3 is a front elevation, partly in section, of the
22 of the housing 14, extends through an opening 47 in
casing of the sequential timer;
' '
the plate 38, through an opening 48 in the cam board 16,
3,028,457
3
4
and is ?anged as at 49 to provide a connection with the
cam board 16. The control knob 12 is attached to the
other end of the control rod 45. Complementary re
and the leads 119, 122 and 120 are connected to a motor
138 for operating the washing machine.
It is contemplated that the present clothes washing
cesses 52 and 53 are provided in the plate 38 and the cam
machine incorporate what is known in the art as a “time
board 16 respectively and a coil spring 54 is disposed
between the plate 38 and board 16 and rests within re
?ll” for ?lling the tub of the machine with water. With
such a filling operation, a predetermined amount of
water is ?owed into the tub through an ori?ce during a
de?nite time interval. As will be understood, the amount
cesses 52 and 53 tending to urge the cam board 16 away
from the plate 58 and in a position whereby the cam sur
of water ?owing through a particular size ori?ce during
faces of the board 16 engage the contacts of the elec—
trical contact board 15. The board 33 has a projection 10 a de?nite set time will vary, depending on the water
pressure. in order .to compensate for variations in pres-v
55 formed with cam surfaces 56 and 5'7 and detents 5i;
sure, the ?ll cam assembly 21} is provided. The ?ll cam
- and 59. An opening 60 is provided in the control rod 45
comprises, in general, a plate 141 rotatably secured to
and a pin 62 is provided in and extends from said open
the bracket 28 by means of a rivet 142. A series of in
ing and is in engagement with the projection 55. By
turning the control knob 12 to either the right or to the 15 dexing holes 14.31am provided in the bracket 23 and a ,
detent 144 is provided in an extension of the plate 141
left the pin 62 rides upon the cam surface 56 or 57 and
for engaging the holes 143. The other end of the plate
141 is provided with a cam surface 145 which is adapted‘
to be engaged by a collar 146 which is ?xedly secured to
20 the rod 45 by a pin 147. The particular position of the
of the board 16 will not engage the contact board 15.
cam plate-141 determines the starting position of the se
There is also provided in the plate 38 an L-shaped
quential timer. If a high water pressure is available
member 63 having a half nut 64 therein and extending
where the machine is installed, the cam plate 141 would
through an opening 65 in the plate 38 and terminating in
be placed in the position shown in FIG. 3 to provide a
a ?anged head 66. A coil compression spring 67 has one
end thereof resting in a recess 68 of the plate 38. and has 25 comparatively short ?ll time, whereas if the pressure is
low the detent 144 would be moved to the right as seen
its other end resting against the ?ange 66 whereby the
in FIG. 3 to move the cam 145 to a position wherein the
half nut is urged into engagement with the lead screw 17.
into the detents 58 or 59. This cam action moves the
cam board 16 from a position wherein its cams will en~
gage the contact board 15 to a position wherein the cams
It will be noted that when the cam board is moved out
of engagement with the contact board 15 that the cam
?ll portion of the timer cycle would be increased.
' V
screw 17 thereby disengaging the nut from the lead screw.
This permits an uninterrupted movement of the cam
board 16 and half nut 64- along a linear path.
The electrical contact block 15 is mounted on the rear 35
dial shown in FIG. 2 and rotated either to the left or to
the right to engage the half nut 64 with the lead screw
17 and to place the cam board 16 into engagement with
the arms 113 of the contact block 15. The arms 113 of
In operation, the water- selector control knob 10 is
board will engage the ?anged end 66 of the L-shaped 30 moved to the desired position, either “hot” or “warm,”
and the knob 12 is moved to the “start” position of the
member 63 to move the half nut 64 away from the lead
wall of the housing 14 by suitable fastening means such
the conducting arms 92, 93, 94, 74, 9'7, 76, 77 and 78
engage the tracks 124, 125, 126, 127, 131, 132, 133 and 134 respectively to energize the lights 135 and 1.36, the
plurality of electrical conducting arms 71-78 inclusive,
water switch 137, the timer motor 18, and the motor
each respectively provided with contact points 81-88 in
elusive; a plurality of conducting arms 92-99 inclusive, 40 138 and thus start operation of the machine. As the
as rivets 69. Disposed within the contact block 15 are a
the arm 92 having a contact point 102 thereon, the arm
93 having a contact point 103, the arm 94 having a con
tact point 104, the arm 95 having a contact point 105,
the arms 96 and 97 having contact points 106 and 107 re
cam board 16 is moved across the contact'block 15, the
cams actuate the switches of the block to operate the
various elements necessary to consecutively carry out the
?ll, wash, rinse and spin cycles of the washing operation.
spectively, the arm 98 having contact points 108 and 109, 45 It is anticipated that various arrangements and repre
sentations of the present invention may be undertaken’
and the arm 99 having contact points 1110 and 111. De_
without departing from the spirit- and scope of the
pending from each of the conducting arms 92-99 are
arms 113 which are adapted to engage the cam board 16
as the cam board is moved linearly with respect to the
stationary contact block 15. The conducting arms 71-78 50
inclusive are connected to a common lead 114 ‘and the
conducting arms 92-99 inclusive are connected to in
dividual leads 115-122 inclusive, respectively.
The cam board 16 has a plurality of cam tracks
appended claims.
Iclaim:
l. A circuit controller comprising the combination in
cluding stationary circuit controlling means, a linearly ~
movable cam pro?le, said pro?le being movable at the
same rate of speed throughout its linear movement, said
circuit controlling means including means engageable
124-134 inclusive, shown diagrammatically in FIG. 9. 55 with said linearly movable cam pro?le e?ective to con
The cam surfaces of these tracks are adapted to make and
break the electrical contacts of the contact block 15 by
trol operation of said circuit controlling means, motor
means for e?ecting linear movement of said cam pro?le,
engaging the arms 113 as the cam board is moved across
and manually operable means for simultaneously effecting
is engaged by the depending arm 113 of the conducting
arm 94; and the tracks 127-134 inclusive, respectively
engage the arms 113 of the tracks 74, 95, 75, 96, 97, 76,
means.
disconnection of said cam pro?le from said circuit con~
the block by means of the lead screw 17. The track 124
of the board 16 is adapted to engage the arm 113 of the 60 trolling means and said motor means from said cam pro
?le during travel of said cam pro?le for elfecting man
conducting arm 92; the track 125 is engaged by the de
ual movement of said cam pro?le in a linear path in either
pending arm 113 of the conducting arm 93; the track 126
direction and in spaced relation to said circuit controlling
2. A circuit controller comprising the combination in
cluding
a plurality of stationary switches and arranged to
77 and 78.
be operated in a predetermined sequence, a linearly
The leads 114-122 inclusive are connected to various
movable cam board, said cam board being movable at
elements of the washing machine and these elements are
the" same rate of speed throughout its linear movement,
sequentially operated as the cam board 16 is moved
across the contact block 15. The lead 114 is one side of 70 said switches including means engageable with the cams
of said linearly movable cam board effective to control
an AC. line and the lead 121 is the other side of the line;
operation of said switches, motor means for eifecting
the lead 115 is connected to a timer light 135 and a
linear movement of said cam pro?le, and manually oper
water selector light 136 (FIG. 9); the lead 116 is con~
able means for simultaneously effecting disconnection of
nected to one side of a water selector switch 137, the
other side of the switch being connected to the lead 118; 75 said cam board from said engageable means and‘ saidv
3,028,457
6
5
motor means from said cam, ‘board during travel of said ‘
cam board to provide manual movement of said cam
board in a linear path in either direction and in spaced
relation to said engageable means.
‘
3. A sequential controller comprising the combination ‘
including a plurality of stationary switches and arranged
ing a plurality of linearly arranged cam tracks'thereon, a
pair of longitudinal slots in the side walls of said housing,
a support member for said camboard having a plurality
of rollers thereon, said rollers being positioned in said
longitudinal slots, a motor, a lead screw driven by said
motor, means associated with said support member and
to be operated in a predetermined sequence, a linearly
engaging said lead screw whereby said motor is ef
movable cam board having a plurality of linearly ar
feetive to rotate said lead screw and drive said support
ranged cam tracks thereon, said switches including means
and cam board in a linear direction, said switches hav
engageable with the tracks or“ said linearly movable cam 10 ing means attached thereto and engageable with the
board and e?ective to control the operation of said
tracks ofisaid cam board and effective as the cam board
is moved linearly across said stationary contact block to
switches, motor ‘means, a lead screw, means for connect
control operation of said switches, and manually oper
ing said motor to said lead screw and means for connect
able means for effecting disconnection of said cam board
ing said cam board ,to said lead screw whereby said motor
means may effect linear movement of said cam board, 15 tracks from said switches and from said lead screw to
and manually operable means for simultaneously et‘r'ect
provide manual movement of said cam board in a linear
path in either direction exclusive of said motor.
ing disconnection of said cam board from said switches
7. A sequential controller comprising the combination
and said lead screw to provide manual movement of said
including an elongated housingv having a front wall, a
cam board ina linear path in either direction in spaced
20 rear wall, and two side walls, a stationary contact block
relation to said engageable means.
comprising‘ a plurality of switches attached to the rear
4. A sequential controller comprising the combination
including a housing, a plurality of stationary switches
wall of said housing, a linearly movable cam board hav
secured to said housing, a linearly movable cam board
ing a plurality of linearly arranged cam tracks thereon, a
pair of longitudinal slots in the side walls of said housing,
having a plurality of cam tracks thereon, said switches
including means engageable with the tracks of said lin 25 a support member for said cam board having a plurality
of rollers thereon, said rollers being positioned in said
early movable cam board and e?ective to control the
longitudinal slots, a motor, a lead screw driven by said
operation of said switches, motor means, a lead screw,
means for connecting said motor to said lead screw and
motor, means associated with said support member and
engaging said lead screw whereby said motor is ef
means for connecting said cam board to said lead screw
whereby said motor means may effect linear movement of 30 fective to rotate said lead screw and drive said support
said ‘cam board, and manually operable means for e?ect
and cam board in a linear direction, said switches hav
ing means attached thereto and engageable with the
ing disconnection of said cam- ‘board ‘from said engage
tracks of said cam board and effective as the cam board
able means of said switches and from said lead screw
is moved linearly across said stationary contact block to
to provide manual movement of said‘ cam board in a
linear path in either direction, said manually operable 35 control operation of said switches, and manually oper
able means for e?fecting disconnection of said cam board
means comprising a rotatable control rod, and cam means
associated with said housing and said cam board to pro
tracks from said switches and from said lead screw to
provide manual movement of said cam board in a linear
vide movement of said board axially with respect to said
housing.
path in either direction exclusive of said motor, said
5. A circuit controller comprising the combination 40 manually operable means comprising a rotatable con
trol rod rota-tably secured to said cam board and slidably
including a housing, a plurality of stationary switches
attached to one wall of said housing, a linearly movable,‘ I secured to said support member, cam means on said
support member and cam engaging means on said control
cam board slidably connected to said housing and adapted
rod whereby rotation of said control rod will move said
to be moved across said cam board, said switches includ
ing means engageable with the cams of said linearly mov 45 cam board away from said contact block, said cam board
as it moves away engaging said lead screw engaging
able cam board e?ective to control operation of said
means to disengage said means from the lead screw.
switches, motor means for eifecting linear movement of
said cam board, and manually operable means for simul
taneously effecting disconnection of said cam board from
References Cited in the ?le of this patent
said engageable means and said motor means from said 50
cam board to provide manual movement of said cam
board in a linear path in either direction in spaced rela
tion to said engageable means.
6. A sequential controller comprising the combination
including an elongated housing having a front wall, a 55
rear wall, and two side walls, a stationary contact block
comprising a plurality of switches attached to the rear
wall of said housinga'linearly movable cam board hav
UNITED STATES PATENTS
585,915
671,106
1,757,124
1,905,228’
2,394,464
2,600,350
2,641,661
Johnston _____________ __ July 6,
Cowperthwait ________ __ Apr. 2,
Lauterbur et al. ______ __ May 6,
James ______________ __ Apr. 25,
McChesney __________ __ Feb. 5,
Webster et al. ________ __ June 10,
Puerner et a1. _________ __ June 9,
1897
1901
1930
1933
1946
1952
1953
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