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Patented July 5, 1949
2,474,987
UNITED STATES WATENT
FFICE
2,474,987
HEATER FOR THE, COOLING WATER 0F
INTERNAL-COMBUSTION ENGINES
Julian Henry Runbakcn, Wilmslow, England
Application January 12, 1948, Serial No. 1,717
In Great Britain October 8, 1947
1 Claim.
(Cl. 219-38)
1
2
This invention has for its object to provide an
improved electrical heating device for preventing
ment 7' which does not have flow apertures at its
top and ‘bottom ends but only peripheral aper~
freezing of the cooling water of internal com
bustion engines for vehicles or for industrial pur
tures of limited area, I ?nd that the Water with
poses.
This invention comprises an electrical heater
having a part which screws into the normal
discharges as steam with a degree of violence into
the water in the bottom of the radiator, so set
ting up a considerable disturbance therein which
tapped aperture in the radiator for the drain tap
and another part tapped to receive the drain tap
is very advantageous in distributing heat through
out the radiator and preventing freezing.
so that installation of the heater necessitates 10
The current for the heater may be obtained
from a main current transformer on the motor
in the .sleeve J‘ heats to evaporation point and then
only the removal of the drain plug from the radi
ator screwing the heater into the drain plug aper
ture, and screwing the drain plug into the heater.
The invention further comprises an electrical
vehicle.
heater in which an electric resistance wire ex
can be supplied direct from the battery.
tends through a sleeve or tube projecting into the
radiator space from the heater body, such sleeve
or tube having apertures therein, the resistance
latter arrangement whilst giving a lower heating
wattage will however usually be su?icient to pre
vent freezing.
Such transformer may also supply a
trickle charger for the vehicle battery. When the
vehicle is stopped in an exposed place, the heater
The
wire being connected to a cap upon the sleeve or
It will be seen that all that is necessary to in
tube and to an insulated lead extending by a fluid 20 stall my improved heater is to remove the ordi
tight joint to the outside of the heater Where it
nary drain plug, screw the heater into the drain
is connected to a socket for the external connecplug aperture in the radiator and screw the drain
tion of the supply lead, the body of the heater
plug into the heater. All this can be done with
constituting the earth return.
out skilled labour or special tools.
Referring to the accompanying explanatory 25 What I claim is:
drawings:
Figure 1 is a sectional elevation through a com
bined radiator water heater and drain tap con
A heating device for preventing freezing of the
cooling water in the radiator of an internal com
bustion engine for vehicles or for industrial pur
poses, comprising a metal tube adapted to screw
structed in accordance with this invention.
Figure 2 shows the device in position in the base 30 into the tapped drain plug aperture of the radi
of a radiator.
ator, and having a perforated part extending into
The ordinary drain tap a is removed from the
the radiator and a part remaining outside the
tapped hole in the base b of the radiator c and is
radiator, an electrical terminal carried. by and
replaced by the heater device d which has a
insulated from the outer part of the tube, an
threaded end e similar to the threaded end of the 35 electrical resistance wire attached at one end to
tap so that the tWo parts are interchangeable.
the inner end of the tube and extending through
The heater device comprises a sleeve or tube
the perforated part of the tube, an electrical con
1‘ with holes g therein which projects from the
nection, from the other end of the resistance wire
heater body into the radiator and has a cap it
extending through the outer part of the tube by
thereon, between which and the plug 1' is carried 40 a ?uid tight joint to the electrical terminal, a ter
an electric resistance wire heating element 7'.
minal conductively connected to the tube and a
The insulated electric lead a" to the heating ele
drain plug ?xed at the outer end of the tube.
ment makes a ?uid tight joint with the plug i.
JULIAN HENRY RUNBAKEN.
The sleeve J‘ is secured by brazing or otherwise
around the boss k on the end of the heater body. 45
REFERENCES CITED
The plate m which is secured on the heater
The
following
references are of record in the
body has a socket 11. secured thereto but electri
?le of this patent:
cally insulated therefrom at one end. This leads‘
UNITED STATES PATENTS
to the heater 1'. Another socket o secured there
to and in electrical connection therewith is at the 50 Number
Name
Date
other end of the plate m. The socket o is for the
1,327,507
Walther __________ __ Jan. 6, 1920
earth return connection. The two sockets have
1,517,301
McMichael et a1 ____ __ Dec. 2, 1924
different sized apertures so that there can be no
error in the electric connections plugged therein.
1,747,184
1,751,857
Schauman ________ __ Feb. 18, 1930
Nelson et a1 _______ __ Mar. 25, 1930
By providing a sleeve 1’ around the heating ele
1,968,713
Schreiber et al. _,__,___ July 31, 1934
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