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Патент USA US2136132

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Nov. 8, 1938.
2,136,132
M. E.‘HANSON
HEAT EXCHANGE SYSTEM
Filed June 20, 1936
2 Sheets-Sheet l
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,izwe?fow
M/L TON E. HANSON
15 W J. G”
Nov. 8, 1938.
M. E. HANSON
2,136,132
HEAT EXCHANGE SYSTEM
Filed June 20, 1936
7 2 Sheets-Sheet 2
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affaqiwgy
2,136,132
Patented Nov. 8,- 1938
UNITED‘ STATES‘
PATENT OFFICE
2,136,132
HEAT EXCHANGE SYSTEM
Milton E. Hanson, Collingswood, N. J., assignor
to B. F. Sturtevant Company, Boston, Mass.
Application June 20, 1936, Serial 'No. 86,403
1 Claim. (Cl. 98—14)
This invention relates to heating systems and
relates more particularly to‘ heating systems for
rapid transit cars.
and air is discharged therefrom into the passen
’
The heating of rapid transit cars in the past
5 has been accomplished by means of electric heat
ing coils placed under or adjacent the car seats,
the only air circulation being thermal, no fans
or blowersbeing associated with the sources of
heat. . Such installations have been unsatisfac
10 tory due to unevenheat distribution and to in
adequate ventilation.
The air ducts I3 are provided between the in- ' ‘
ner walls l5 and the outer walls I6 of the car
.
>
There has recently been a change in design of
ger space through the plurality of spaced out
lets ".
i
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As shown by the drawings, by having a fresh
air inlet ?ush with the side of the car, a fresh
air inlet passage leading to the blower, an air
tempering passage parallel to the fresh air inlet
- passage, the air tempering passage discharging 10
into a duct running at right angles thereto, a
compact unit conforming with the outline of the
rapid transit cars resulting in better appearance,
car is provided completely below the ?oor.
increased riding comfort and reduced operating
A volume of air ‘equal to that of the fresh air
drawn into the units is discharged from the car 15'
through the usual exhaust outlets.
‘The heat exchanger I 0 may be electric or steam
15 expense.
The new cars have the so called
“stream-line” contours.
’ An' object of this invention is to provide an
improved heating system for rapid transit cars.
, heating'elements or may be coils through which
Another object of the invention is to provide
20 heating units including blowers which may be
placed beneath the ?oor of a new design rapid
transit car and to cooperate with the curved
walls of the car to provide an inconspicuous as
well as a compact e?lcient heating system.
Other objects of the invention will be apparent
from the following description taken together
with the drawings.‘
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The invention will now be described with ref
erence to the drawings of which:
a refrigerant may be circulated for cooling.
While one embodiment ‘of the invention has 20
been ‘described for the purpose of illustration,
it should be understood that the invention is ‘not
to be limited to the exact arrangement described,‘
as many departures and modifications will sug
gest themselves to those skilled in the art, after 25
having had access to this disclosure.
What is claimed is:
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Heat exchange apparatus comprising in com
bination, a railway passenger car having a ?oor
v30 ‘ Fig. 1 is a sectional plan view lookingv down ' and side walls extending below the ?oor, ‘aicen- 30
wardly upon a car equipped according to this trlfugal fan having an axial inlet and having an
invention, with the heating apparatus in dotted
outline;
'
Fig. 2 is a side view‘ of one end of the car
35 of Fig. 1, showing one heating unit in dotted
outline, and
Fig. 3 is a transverse section along the lines
3—3 of Fig. 1.
40
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involute casing with a tangential outlet mounted
underneath said ?oor of said car, means in and
conforming to the contour of one of said walls
forming a fresh air-inlet into said car, means 35
forming a converging air passage from said fresh
air inlet to said inlet of said fan, means forming
an air tempering passage connecting with said
In the car illustrated by the drawings there ‘ outlet and extending substantially at right angles
are provided four heating and ventilating units, to. the direction of air flow through said outlet, 40
air tempering means in said tempering passage,
one in each comer of the car.v These units com
prise the blower ,6 driven by the motor ‘I, the and means forming a substantially vertical air
fresh air inlet chamber 8, the fresh air'inlet 9 in exhaust passage extending from said tempering
passage through said ?oor into said car at. a
the lower curved wall of the car, the heat ex
change members or coils III in the air tempering Point substantially above said fresh air inlet. I
compartment ll, andthe discharge outlet it into
the duct II. The entire assembly is :hung be
neath the car floor I l.
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MILTON E. HANSON;
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