U.S. patent number 3,805,404 [Application Number 05/375,634] was granted by the patent office on 1974-04-23 for water cooled condenser dryer for laundry center.
Invention is credited to Ira L. Gould.
United States Patent |
3,805,404 |
Gould |
April 23, 1974 |
WATER COOLED CONDENSER DRYER FOR LAUNDRY CENTER
Abstract
A recirculating water-cooled low profile condensing unit for a
vertically stacked combination clothes washer and non-vented dryer
wherein a plurality of condenser plates, located in a plenum
chamber above the dryer top wall, are arranged in a vertically
spaced shallow V-shaped configuration. A serpentine cooling water
series passageway is connected via valve means to the cold water
inlet tube of the washer and contacts the plates in heat exchange
relation such that the volume of water required for condensing is
reduced to a minimum without increasing the drying time interval
required for a vented dryer. A longitudinally extending center
baffle partition is aligned with the apex of the plates so as to
divide the spaces between the plates into a plurality of parallel
side-by-side spent air inlet and condensed air outlet air flow
passages to maximize the condensing plate surface contacted by the
recirculating drying air. Condensate flows from the plates to an
underlying conforming shallow V-shaped drain pan for discharge into
the washer located beneath the dryer.
Inventors: |
Gould; Ira L. (Hamilton,
OH) |
Family
ID: |
23481671 |
Appl.
No.: |
05/375,634 |
Filed: |
July 2, 1973 |
Current U.S.
Class: |
34/75; 34/596;
34/77; 68/20 |
Current CPC
Class: |
D06F
58/04 (20130101) |
Current International
Class: |
D06F
58/04 (20060101); F26b 021/06 () |
Field of
Search: |
;34/72-78,131-133
;68/20 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
Primary Examiner: Camby; John J.
Assistant Examiner: Yeung; James C.
Attorney, Agent or Firm: Barthel; Edward P.
Claims
I claim:
1. In combination a stack-on laundry appliance comprising a lower
washer cabinet including a top wall, said washer cabinet adapted to
be associated with a source of water supply and a drain, an article
drying cabinet mounted directly on the top wall of said washer
cabinet, said article drying cabinet comprising a box-like
structure enclosing a rotatable tumbling drum including a front
panel having a front access opening and a rear wall having a
portion thereof provided with air inlet means, an exhaust air
outlet opening in the rear wall, means for recirculating heated air
through said tumbling drum including a drying air blower having an
inlet and an outlet, means connecting said blower inlet to the
interior of said tumbling drum, means connecting said blower outlet
to said exhaust air outlet, an apertured heater support plate
mounted on said dryer rear wall rearwardly thereof and cooperating
with the heater cavity portion of said rear wall to form a heater
cavity, heater means supported adjacent said rear wall air inlet
means whereby condensed air may be heated prior to being drawn into
said drum through said inlet means wherein the improvement
comprises, a condenser plenum housing located coextensive with the
top wall of said dryer cabinet having an open rear end wall, two
side-by-side tiers of water cooled vertically spaced condenser
plates in said condenser housing, each pair of opposed plates
symmetrically positioned in shallow V-shaped configuration in
cross-section, means for recirculating cooling water from said
washing machine source of water supply in heat exchange relation
with said condenser plates for return to said washer drain, a
vertical positioned longitudinally extending divider baffle located
between said tiered plates dividing said open rear end wall of said
condenser housing into a spent air-intake side and a condensed
air-discharge side, said tiered condenser plates providing a
plurality of laminar flow parallel air flow passages therebetween,
said plates spaced a defined distance from said condenser plenum
housing front end wall providing a cross-over mixing air flow space
at the closed portion thereof, duct means on the rear wall of said
dryer cabinet, said duct means providing a first duct section
conducting the dryer spent air from the blower outlet to the
air-intake side of said condenser plenum, said duct means providing
a second duct section conducting the condensed air from the
air-discharge side of said condenser plenum housing to said rear
wall inlet means so as to be drawn therethrough for reheating and
return to said drum.
2. In combination a stack-on laundry appliance comprising a lower
washer cabinet including a top wall, said washer cabinet adapted to
be associated with a source of water supply and a drain, an article
drying cabinet mounted directly on the top wall of said washer
cabinet, said article drying cabinet comprising a box-like
structure enclosing a rotatable tumbling drum including a front
panel having a front access opening and a rear wall having a
portion thereof perforated and offset inwardly to form a heater
cavity portion, an exhaust air outlet opening in the rear wall
adjacent the dryer bottom wall, means for recirculating heated air
through said tumbling drum including a drying air blower having an
inlet and an outlet, means connecting said blower inlet to the
interior of said tumbling drum, means connecting said blower outlet
to said exhaust air outlet, an apertured heater support plate
mounted on said dryer rear wall rearwardly thereof and cooperating
with the heater cavity portion of said rear wall to form a heater
cavity, heater means supported by said heater support panel within
said heater cavity whereby air may be drawn into said drum through
said apertures past said heater means wherein the improvement
comprises, a condenser plenum housing located coextensive with the
top wall of said dryer cabinet having an open rear end wall, two
side-by-side tiers of water cooled vertically spaced condenser
plates in said condenser housing, each pair of opposed plates
symmetrically positioned in shallow V-shaped configuration in
cross-section, a single-pass water conducting passageway comprising
a tubing bent in the form of a serpentine coil provided with a
plurality of looped ends extending between said plates and a
plurality of straight portions contacting said plates, means for
circulating cooling water from said washing machine source of water
supply through said tubing for return to said washer drain, a
vertical positioned longitudinally extending divider baffle located
between said tiered plates dividing said open rear end wall of said
condenser housing into a spent air-intake side and a condensed
air-discharge side, a condensate drain pan folded about a
longitudinal fold line providing a shallow V-shaped bottom wall in
cross section conforming with said plates and positioned subjacent
thereto, a drain receptacle located substantially at the apex of
said fold line for receiving condensate water from said plates,
said plates spaced a defined distance from said condenser plenum
housing front end wall providing a cross-over turbulent air flow
space at the closed portion thereof, and a pan-shaped back panel
duct housing coextensive with the backwall of said dryer cabinet
providing side-by-side inlet and outlet openings separated by a
vertical partition, said vertical partition having its outer edge
in sealed abutment with the rear edge of said baffle plate whereby
said duct inlet and outlet openings are in communication,
respectively with said spent air-intake and said condensed
air-discharge of said plenum housing, said duct housing having a
first vertically oriented duct section enclosed by a closure panel
conducting the dryer spent air from the blower outlet to the
air-intake side of said condenser plenum, said closure panel having
a portion thereof overlying said heater panel apertures rearwardly
off-set from the plane of said vertical partition rear sealing
edge, said back panel duct housing providing a second open duct
conducting the condensed air from the air-discharge side of said
condenser plenum housing for drawing through the perforated heater
plate for reheating and return to said drum.
3. In combination a stack-on laundry appliance comprising a lower
washer cabinet including a top wall, said washer cabinet adapted to
be associated with a source of water supply and a drain, an article
drying cabinet mounted directly on the top wall of said washer
cabinet, said article drying cabinet comprising a box-like
structure enclosing a rotatable tumbling drum including a front
panel having a front access opening and a rear wall having a
portion thereof perforated and offset inwardly to form a heater
cavity portion, an exhaust air outlet opening in the rear wall,
means for recirculating heated air through said tumbling drum
including a drying air blower having an inlet and an outlet, means
connecting said blower inlet to the interior of said tumbling drum,
means connecting said blower outlet to said exhaust air outlet, an
apertured heater support panel mounted on said dryer rear wall
rearwardly thereof and cooperating with the heater cavity portion
of said rear wall to form a heater cavity, heater means supported
by said heater support panel within said heater cavity whereby air
may be drawn into said drum through said apertures past said heater
means wherein the improvement comprises, a condenser plenum housing
located coextensive with the top wall of said dryer cabinet having
an open rear end wall, two side-by-side tiers of water cooled
vertically spaced condenser plates in said condenser housing, each
pair of opposed plates symmetrically positioned in shallow V-shaped
configuration in cross-section, serpentine cooling water flow
passage means contacting said plates, a vertical positioned
longitudinally extending divider baffle located between said tiered
plates dividing said open rear end wall of said condenser housing
into side-by-side spent air-intake and condensed air-discharge
openings, said condenser plates spaced a defined distance from said
condenser plenum housing front end wall providing a cross-over air
flow space at the closed front end portion of said plenum, and a
pan-shaped ducting panel having a surrounding flat flange sealed to
the periphery of said dryer cabinet rear wall, said ducting panel
having a substantially vertical partition dividing said duct panel
into an open cavity portion and a closed duct portion enclosed by a
closure panel, said duct portion having an upper air outlet in
coextensive sealed relation with said plenum spent air-intake and a
lower spent air-inlet in communication with said blower outlet,
said closed duct portion having an upper cover portion in spaced
overlying relation with a portion of said heater panel apertures
whereby said cavity portion is in communication with said heater
panel apertures such that condensed air from said plenum housing
air-discharge is drawn through said heater panel apertures for
reheating and return to said drum.
4. In a clothes dryer having an article drying cabinet, said
article drying cabinet comprising a box-like structure enclosing a
rotatable tumbling drum including a front panel having a front
access opening and a rear wall having a portion thereof perforated
and offset inwardly to form a heater cavity portion, an exhaust air
outlet opening in the rear wall, means for recirculating heated air
through said tumbling drum including a drying air blower having an
inlet and an outlet, means connecting said blower inlet to the
interior of said tumbling drum, means connecting said blower outlet
to said exhaust air outlet, an apertured heater support panel
mounted on said dryer rear wall rearwardly thereof and cooperating
with the heater cavity portion of said rear wall to form a heater
cavity, heater means supported by said heater support panel within
said heater cavity whereby air may be drawn into said drum through
said apertures past said heater means wherein the improvement
comprises, a condenser plenum housing located coextensive with the
top wall of said dryer cabinet having an open rear end wall, two
side-by-side tiers of water cooled vertically spaced condenser
plates in said condenser housing, each pair of opposed plates
symmetrically positioned in shallow V-shaped configuration in
cross-section, serpentine cooling water flow passage means
contacting said plates, a vertical positioned longitudinally
extending divider baffle located between said tiered plates
dividing said open rear end wall of said condenser housing into
side-by-side spent air-intake and condensed air-discharge openings,
said condenser plates spaced a defined distance from said condenser
plenum housing front end wall providing a cross-over mixing air
flow space at the closed front end portion of said plenum, and a
pan-shaped ducting panel having a surrounding flat flange sealed to
the periphery of said dryer cabinet rear wall, said ducting panel
having a substantially vertical partition dividing said duct panel
into an open cavity portion and a closed duct portion enclosed by a
closure panel, said duct portion having an upper air outlet in
coextensive sealed relation with said plenum spent air-intake and a
lower spent air-inlet in communication with said blower outlet,
said closed duct portion having an upper cover portion in spaced
overlying relation with a portion of said heater panel apertures
whereby said cavity portion is in communication with said heater
panel apertures such that condensed air from said plenum housing
air-discharge is drawn through said heater panel apertures for
reheating and return to said drum.
Description
This invention relates to a vertically stacked combination clothes
washer and clothes dryer, and more particularly, to a recirculating
water cooled condenser for the combination washer and nonvented
dryer for removing moisture from the drying air without increasing
the drying time interval.
As discussed in U.S. Pat. No. 3,545,235 issued Dec. 8, 1970 to M.A.
Menk, and assigned to the same assignee as the instant application,
the vertically stacked combination clothes washer and vented
clothes dryer incorporates a mounting arrangement for a laundry
center wherein the clothes dryer is stacked on top of the clothes
washer so as to provide an appliance that has a minimal overall
vertical height such that the superimposed dryer is convenient for
loading and operating and also for locating the appliance in low
ceiling environments such as alcoves or closets.
It is an object of this invention to provide a vertically stacked
combination clothes washer and nonvented clothes dryer
incorporating a recirculating air condensing arrangement of the
water cooled type for removing moisture from the drying air without
materially increasing the overall size of the unit while minimizing
the volume of condensing water required.
Another object of this invention is a provision of a combination of
a washer-dryer appliance such that the dryer is in a stacked-on
cabinet with the dryer top wall having a low profile water-cooled
condenser formed of a plurality of super-imposed vertically spaced
plates in a plenum chamber, each having a chevron or shallow
V-shaped configuration in cross section cooled by a single cooling
water passageway in the form of a serpentine coil associated with
the plates. A longitudinal center partition or air baffle, aligned
with the crests of the plate V's divides the spaces therebetween
into a network of side-by-side inlet and outler parallel air
passageways which communicate via a duct housing on the back wall
of the dryer for recirculation of drying air therebetween. The
condenser plates are sloped to the center drain trough allowing the
water of condensation to pass downwardly on either side of the
baffle to a subjacent drain pan having a complementary shallow
V-shaped cross section for passage via the cooling water drain tube
to the drain facilities of the washer below.
In the Drawings:
FIG. 1 is a perspective view of the combination washer-dryer
incorporating the water-cooled condenser of the present
invention;
FIG. 2 is a rear view, partly in elevation and partly in section,
with parts cut away to show the water circulating system of the
condenser;
FIG. 3 is a perspective view of the duct housing for mounting on
the rear wall of the dryer;
FIG. 4 is a perspective view of the dryer portion of the appliance
with parts cut away to show the air recirculating system between
the condenser and the dryer;
FIG. 5 is an exploded perspective view of the water cooled
condenser components;
FIG. 6 is an enlarged fragmentary plane view of the condenser in
flat assembly;
FIG. 7 is a section of the condenser taken on line 7--7 of FIG.
6.
In accordance with this invention and with reference to FIGS. 1, 2,
3 and 4, a vertically stacked combination washer-dryer or domestic
laundry center 10 is illustrated. The appliance is comprised of a
clothes washer or article washing machine 14 and a clothes dryer or
article drying machine 16 located directly above the washing
machine 14. Details of the clothes washer 14 form no part of the
instant invention. For a description of one type of washing machine
suitable for use with the dryer, reference may be had to the
above-referenced U.S. Pat. No. 3,545,235, the disclosure of which
is incorporated by reference herein.
The clothes dryer 16, located immediately above the clothes washer
14, has its cabinet portion mounted on the top wall 20 of the
washing machine cabinet. The dryer cabinet includes vertical side
walls 22 and 23 located in the same vertical plane as the side
walls 24 and 25, respectively, of the washing machine cabinet. The
dryer cabinet also has a front wall formed of a substantially
vertical upper portion 26 including a control panel 27 and a
slanted or non-vertical lower portion 28. The dryer cabinet portion
also has a rear panel 30 (FIG. 4) having an indented portion 31 and
an inwardly canted portion 32 with perforations 33 therethrough.
Mounted on the rear panel 30 behind the indented portion 31 is a
heater support panel 34 carrying a plurality of electric heaters 36
located within a heater cavity formed by the heater panel 34 and
the indented portion 31 of the rear panel 30. The panel 34 is also
provided with four rows of openings 35 near its upper edge and
behind the heater so that air may be drawn across the heaters and
heated before entering the drum or clothes treatment enclosure as
disclosed in U.S. Pat. No. 3,584,393, the disclosure of which is
incorporated by reference herein. The rear panel 30 with the
indented portion 31 and the heater panel 34 are assembled together
as a unit and mounted on rear flanges 37 of the side walls of the
dryer cabinet.
Mounted behind the vertical portion of the front wall 26 of the
dryer cabinet includes a dryer access opening 42, while a dryer
door 44 is pivotally mounted on a vertical axis to form a closure
for the dryer access opening 42. Located within the dryer cabinet
is a rotating drum 54 which is cylindrical and perforate, the
details of which are disclosed in the U.S. Pat. No. 3,545,235.
A belt 60 encircles the drum 54 and is driven by a prime mover
including a motor 62 and a power shaft 63. The power shaft 63
directly drives a blower 54 and the belt 60. As the blower 54 is
driven, air is impelled through an air flow duct system, indicated
by the solid line arrows in FIG. 4, as follows. Air is drawn
through the opening 35 in the heater panel 34, downwardly past the
heaters 36, where it is heated, then through the perforations 33 of
the indented portion 32 and diagonally through the dryer drum
enclosure 54. The air is drawn through the perforations 66, located
in the lower part of the stationary front portion 68, and passes
through the lint filter 70 positioned behind these last-named
perforations 66, and the passageway 72 to the blower 64 and is then
exhausted from the dryer cabinet by way of a flexible conduit 74
which is adapted for connection by means of a collar 76 (FIG. 2) to
a rear exhaust opening in the rear panel 30.
A back ducting panel, shown generally at 80 in FIG. 3, is
preferably formed in a one-piece integral molded manner from
suitable plastic material such as A.B.S. plastic, provides a
rectangular pan-shaped duct panel member having a surrounding
turned-out flat flange 81 covered with a felt strip 82 for
air-tight sealed abutment to the outer periphery of the rear panel
30, heater panel 34 and the open end of the top mounted condenser
plenum housing 83 (FIG. 4) by suitable threaded fasteners
positioned in holes 84. The ducting panel 80 provides an upwardly
diverging vertically elongated spent drying air expansion duct 86
and a generally box-shaped condensed air venting cavity 88
separated by a vertical partition 89 having a diverging wall
portion 90 and a vertical wall portion 91. The expansion duct 86
includes a lower cover panel 92 having an upper cover panel 94
inwardly off-set by notched portion 96. The lower border of upper
cover panel 94 includes lower seal means in the form of a flat felt
strip 98 which is flush with felt seal portion 99 located on the
edge of recessed transverse partition 100. The felt seals 98 and 99
are adapted to abutt in a sealed manner with the turned edge of
outwardly directed transverse flange 102 formed along the bottom
edge of the heater support panel 34. The off-set wall 94 is defined
at its upper extremity by transverse upper seal means formed by
sealing strip 103 defining the lower edge of a rectangular spent
air duct outlet 104. The lower end of casing 86 has an opening 105
fitted with a collar 106 which mates in a sealed manner with collar
76 in rear panel 34. It will be noted that in the preferred form
the depth of duct housing 80 is about 2.0 inches so as not to add
materially to the overall depth of the dryer cabinet.
The venting cavity 88 and the duct outlet 104 are separated by
partition 91 having a flanged felt seal strip 110 coplanar with
panel duct flat flange 82 for sealed contact with the baffle to be
described.
The low profile condenser housing 83 shown in FIG. 5 is located on
and coextensive with the dryer cabinet top wall 112 and enclosed on
three sides by means of rectangular flanged side panels 114 and 116
and a removal clip-on front panel 118. The front panel 118 has an
upper integral reverse bent clip flange 120 operative to be
received in notched portions 122 and 124 of side panels 114 and
116, respectively, together with lower push-in clips 125. An
L-shaped angle member 126 is suitably secured to the top wall 112
as by threaded fasteners 128 while the outward faces of the angle
126 and front flanges of the side panels 114, 116 and L-shaped
angle 126 are provided with sealing material 132, 133 and 134 such
as felt strips, for example. A top condenser chamber cover plate
136, having downwardly extending front and rear flanges 138, 140 is
affixed to the top flanges 142 and 144 of the side panels such as
by threaded fasteners 146. Rear flanges 148 and 149 are provided on
the side panels 114, 116 respectively, for abuttingly receiving in
a sealed manner with coplanar flange 140 the upper portion of
housing peripheral flange 82 to complete a condenser planeum cavity
150 coextensive with the top wall 112 of the dryer and having a low
profile vertical height of about 5.50 inches so as not to add
materially to the overall height of the washer-dryer cabinet.
A plate-type condenser assembly, generally indicated at 160 in FIG.
5, fabricated for vertical spaced location in the plenum cavity 150
by support means in the form of upper and lower polystyrene
expanded or cast foam insulation pieces 162 and 164. The lower cast
insulation piece 164 is provided between the top wall 112 of the
dryer cabinet and condensate drain pan 166 and has a shallow
V-shaped upper surface 168 for receiving the conforming shallow
V-shaped bottom wall 170 of the pan 166. The drain pan has a
peripheral upstanding flange 172 for retaining condensate water for
flow to its center longitudinal fold-line or apex 174 while a drain
receptacle 176 is located adjacent the aft portion of the drain pan
166 adjacent to the apex 174 for receiving the condensate water. In
the disclosed form of the invention condenser means in the form of
assembly 178 comprising two side-by-side tiers of paired plates 180
and 182 arranged in stacked symmetrical fashion with each pair of
plates having a shallow V-shape cross-section supported in
vertically spaced conforming relation to the adjacent pair of
plates.
As seen in FIG. 5, cooling water flow passage means contacting the
paired tiers of plates are shown in the form of a single coil 183
consisting of a continuous tube or pipe having a plurality of
parallel, generally straight portions 184 interconnected by return
bend portions 186 to provide series flow of cooling water through
the water supply tubing. The cooling coil 183 is secured to the
plates 180, 182 preferably formed of aluminum sheet material, in
any suitable manner, such as by welded straps shown at 185 to
provide a good heat conductive bond between the plates and the
tube. The plates 180, 182 and coil 183 are folded upon themselves
in S-shaped fashion to provide the paired tiers shown.
Identical condenser support means, in the form of coil support
header cap plates 187 and 188, are secured by their end flanges 192
and 194 adjacent either side flanges 172 of the drain pan 170 and
are provided with suitable slotted openings 196 for receiving the
return bend portions 186 of the coil 183 therethrough. Although in
the disclosed form of the invention the coil 183 and rectangular
plates are shown as being separately fabricated members, it is
understood that the condenser plate could be made in the form of
roll bonded sheets in integral form by means in which a continuous
plate with expanded passageways could be fabricated and return
folded in a similar S-shape manner.
In the preferred form of the invention each pair of shallow
V-shaped condenser plates 180 and 182 are sloped inwardly at a
drain angle of about 1 inch in 10.5 inches while the vertical
spacing between banks of plates is about one inch and the spacing
between the topmost and bottommost pair of plates and the
insulation pieces 162 and 164, respectively, is about three-eighth
inch to provide four tiered parallel air flow passages. The
dimension of each of the paired rectangular plates 180 and 182 is
of the order of 9.5 inches by 12.00 inches. A pair of side
insulation pieces 202 and 204 are shown in FIG. 5 having an
inwardly facing groove 206 for encasing the return bend portion 186
of the cooling coils 183.
In order to divide the sandwich or tiered plate condenser into
side-by-side air entrance and air return passes a longitudinally
extending divider baffle, indicated 210 in FIG. 5, is provided
which in the disclosed form is provided with a plurality of
vertically extending equally spaced slots 212, thus allowing the
baffle 210 to be positioned between the pair of tiered plates 180
and 182 with the coil straight pipe sections 184 being received in
the slots 212. As viewed in FIG. 4, the rear facing edge 214 of the
baffle 210 is located flush with the outer faces of the condenser
housing flanges 140, 148 and 149 such that the sealing strip 110 of
duct housing 80 abutts the baffle edge 214 in an air sealing manner
upon mounting of the ducting panel 80. In this way spent moist
drying air exits ducting panel outlet 104 and is drawn into the
condenser plenum chamber 150 for movement through the tiered
parallel laminar flow passages defined between the right hand tier
of plates 180 (as viewed in FIG. 5).
The spent air passes into the forward plenum chamber crossover duct
220 defined by the forward edge 213 of the baffle plate 210 and the
front removable panel 118, which in the form shown is about 7.3
inches, such that the drying air is redirected through an angle of
180.degree., indicated by the dashed arrows in FIG. 5. Thus, the
spent drying air is drawn by blower 64 through separate laminar
flow parallel passages between the condenser plates 180 where it is
allowed to mix in crossover duct 220 before entering the flow
passages between plates 182. The decrease in velocity and increase
in turbulence of the air in plenum chamber duct 220 allows the
settling out of lint into the crossover duct 220 which lint can be
periodically collected by the housewife by removal of the front
panel 118.
As best seen in FIGS. 2 and 6 the condenser plate coolant inlet
tubing 230 mates with a cold water inlet tube 232 via connection
234. The lower end of tube 232 is connected to a solenoid
controlled valve 236 which valve is in turn connected to one branch
238 of a Y connection 240 having its stem portion connected to the
cold water inlet tube 242, adjacent hot water inlet tube 243, for
the washing machine 14 of the combined appliance. The coolant water
exits the plate condenser coil 183 by outlet pipe 241, connected by
flare connector 244 to coolant drain pipe 246 which is in turn
connected to one branch 248 of a second Y connector 250 which has
its stem portion connected to a flexible condensate drain tube 252.
The flexible drain tube 252 exits from the rear overhang 254 of the
dryer cabinet and is attached by suitable means such as straps 256
to the washer drain tube 258 for discharge to any convenient
drainage or sewage system. As seen in FIG. 2 the condensate water
drain receptacle 176 is connected to a condensate drain pipe 260
which is connected to the other branch 262 of a second Y connection
250 for drainage into tube 252.
While the embodiment of the present invention herein disclosed
constitutes a preferred form, it is to be understood that other
forms might be adopted.
* * * * *