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July 8, 1947-
Filed April 24, 1944 I
Patented July 8, 1947
2,423,57 8
Thomas A. Buckles, Portland, Oreg.
Application April 24, 1944, Serial No. 532,537
1 Claim. (Cl. 219-39)
ture thereof and is electrically connected in the
supply circuit In in the conventional manner and
is set to open and close the electrical circuit to
the heating element at predetermined high and
low temperatures, respectively, of the water in
the boiler.
The valve control means I2, previously referred
to, consists of a housing 2I whose upper end is
closed as at 22 and formed with relatively large
apertures 23. The interior of the housing is in
open communication with the water supply pipe
IZA, as at 24. The lowermost end of the housing
This invention relates to improvements in wa
ter heaters and has for its principal object the
provision of means for controlling the circula
tion of the water through the heating element
and also valve means for controlling the cold
water supply to the interior of the tank through
the bottom end thereof, said valve means also
preventing circulation or mixing of the cold wa
ter with the heated water at all times.
The foregoing and other objects will appear as
my invention is more fully hereinafter described
in the following speci?cation illustrated in the
accompanying drawing, and ?nally pointed out
p in the appended claim.
terminates in a valve seat 25 to seat a ?xed valve
26 formed integral with a hollow tubular stem or
In the ‘drawing:
15 vertical extension 2‘! closed at its upper end and
Figure 1 is a sectional side elevation of a water
heater made in accordance with my invention.
Figure 2 is a sectional plan view taken on the
line 2-2 of Figure 1.
Refering now more particularly to the draw 20
formed with relatively small openings 28 in its
Wall. The stem is open through the valve 26 and
in open communication with the pipe II con
necting with the interior of the heating unit 8.
From the foregoing it will be apparent that water
from the supply pipe I2A may flow through the
valve housing, through the apertures 23 therein
into the boiler and through the smaller openings
28 in the valve stem 21 into the interior of the
outer cylindrical casing 3. The lowermost end of 25 heating unit 8.
ri‘he operation of the invention is as follows:
the casing is turned inwardly as at 4 to support
Assuming that the boiler has just been installed
itself, the insulating material and the tank I
and ?lled with cold water which comes up through
upon any approved form of base, generally indi
the intake I2A through the valve housing 2|,
cated at 5. The upper end of the outer casing
3 is provided with a removable lid portion 6. Se 30 apertures 23 therein and into the boiler to fill
the same. Water also passes through the aper
cured to and extending through the bottom wall
Reference numeral I indicates a water boiler of
more or less conventional design surrounded by a
jacket of insulating material 2 and encased by an
tures 28 in the upper end of the valve stem
‘I of the boiler I is a heating unit generally indi
cated at 8, within which is enclosed an electrical
heating element 9 supplied with electrical energy
from any convenient source of supply by means 35
of cables Ill. The housing of the heating unit
is of greater diameter than the heating element
9 to provide a space to receive a supply of water
coming from a pipe I I connected through a valve
control means, generally indicated at I2, with a 40
water supply pipe I2A. The uppermost end of
the heating unit 8 is slotted as at I3 to allow the
heated water coming up through the element 8
to be delivered to the interior of the boiler I.
This end of the heating unit is embraced by and 45
disposed within a ?tting I 4 formed on the top
wall I5 of the boiler and into this ?tting is at
tached an elbow IB connecting with a pipe I‘!
which through an elbow I8 connects with an out
let pipe I9 which extends downwardly alongside 50
the tank and terminates within or below the base
thereof and connects with a pipe connection to
a. hot-water outlet ?xture (not shown) .
A thermostat 20 extends through or into con
tact wtih the boiler to partake of the tempera
thence through the pipe II and into the heating
unit 8 which houses the heating element 9.
When this is accomplished, the thermostat 20
closes the circuit I 0 to the heating element -9 and
the same heats the water within the heating unit
8. This heated water of course rises to the top of
the heating unit and enters the boiler through
the slots I3 in the upper end of the heating unit.
Eventually of course the entire contents of the
boiler become heated and with all outlets closed
the hot water circulates upwardly and the cold
water downwardly through the valve I2 and into
the heating unit. When the outlet ?xture (not
shown) is open and the hot water is being drawn
off, the circulation stops and as the hot water
is drawn out through the slots I3 in the heating
unit 8 at its upper end and through the outlet
pipe I‘I, cold water enters the bottom of the boiler
through the valve housing 2|, through the aper
tures 28 in the upper end of the hollow valve stem
20 then through the pipe I I to the interior of
the heating unit. The water being heated by the
65 unit travels upwardly therein and of course draws
the cold Water from the bottom of the boiler
through the apertures 23 into the hollow valve
stem and into the bottom of the heating unit.
Thus the water in the boiler circulates through
the valve into the heating element and out of
the top thereof into the upper end of the boiler.
Assuming now, that the boiler is ?lled with hot
boiler, an outlet pipe in communication with the
uppermost end of the heating unit and extending
unit, thus the system is now rendered non-circu
lating. Conversely when the heating element is
heating circulation is created by the water pass
tom of the valve housing and in communication
"with a pipe for directing cold water to the me
downwardly and outwardly into communication
with an outlet ?xture, a cold water supply pipe
in communication with the interior of the boiler
at the lowermost end of the heating unit through
a valve means extending through the bottom wall
water and through the medium of the thermostat
of the boiler into communication with the interior
the heating element is 01? and hot Water is being
hereof, said valve means consisting of a verti
drawn from the top of the boiler, then the cold 10 cally disposed hollow body member in communi
cation through apertures at its upper end with
water entering the bottom of the boiler, through
the large openings 23 of the valve housing, is pre
the interior of the boiler and in communication
vented from backing down through the hollow
near its lower end with a cold water supply pipe,
stem 2? and into the heating unit since in the ab
a ?xed hollow valve stem disposed within the
valve housing and terminating at its lowermost
sence of heat therein there is no upward pull or
end in a hollow valve ?xedly seated in the bot
upward movement of the water in the heating
ing upwardly therethrough and consequently
drawing cold water from the supply pipe I2A
through the hollow stem 27, pipe H and into the
terior of said heating unit, whereby upward
20 movement of the heated water within the heat
heating element. Brie?y stated it may be said
that when the heat is on circulation is created;
when the heat is 01f the system is non-circulating. 25
While I have shown a particular form of em
bodiment of my invention, I am aware that many
minor changes therein will readily suggest them
selves to others skilled in the art without depart
ing from the spirit and scope of the invention.
Having thus described my invention, what I
claim as new and desire to protect by Letters
Patent is:
A water heater comprising a boiler closed at
both of its ends, a heating unit extending through
both ends of the boiler and in open communica
tion near its upper end with the interior of the
ing unit draws cold water from the cold Water
supply pipe through said hollow valve stem and
into the heating unit.
The following references are of record in the
file of this patent:
Christian ________ __ Jan. 16, 1923
Hynes __________ _.. Aug. 20, 1935
Ball ______________ __ Aug. 6, 1912
Shriner __________ __ Dec. 27, 1927
Knapp __________ __ Mar. 28, 1939
Hoyt ____________ __ Sept. 10, 1929
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