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Патент USA US2130131

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Sept 13, 1938-
‘Filed March 27, 1951
I Patented Sept. 13, 1938 v 2
‘Clarence r‘. Hirshfeld, Detroit, Mich, assignor. to
Transit Research Corporation, New York, N. Y.,
a corporation or New York
ApplicationiMarchlz'i. 1937, ‘Serial No. 133,411 5 Claims. I (01. 105L451)
Fig. 2 is a diagrammatic sectional view taken
upon a plane just‘ below the ?oor of the car,
Fig. 3 is a sectional view on the line 3-3 of
invention relates to public conveyances
such as street cars and buses, ‘and especially to:
electrically operated conveyances intended to be'
‘used in those parts of the world in which snow is
5 encountered during a portion of each year.
During the operation of street cars in snowy
weather, it has been found that entering passen
Fig. 2, taken in the direction of the arrows, and
Fig. 4 is a sectional view on the line 4—4 taken
in the direction of the arrows. ‘
While this invention is appii' able to any type
of street car or to buses or other vehicles, I have
chosen to illustrate it in connection with the
,most modern type of street car having a heating 10
gers carry into'the cars a certain amount'of snow
upon their feet. Some .of this snow drops o?
10 or is scraped‘o? onto the steps as they enter the
car. Some passengers stamp their feet to re
system of_ the type disclosed in the co-pending
move it as they enter. _W'hen snow is falling
and the wind is blowing against‘the entrance
side of the car, it is frequently blown in‘ when the
1‘ door is open to admit passengers. ‘Sometimes the
application of Emil H. Piron, Serial No. 84,732,
and having, with this application, a common as- ‘
signee. In this form of street car, the side sills
l0 and ll’,’the cross sills l2, l3, l4, and I5, and 15
the pier posts l6, l1, l8, I9, 20, 2!, 22 and 23,
snow drifts in also under the lower edge of the
door when the door is closed. It is trampled
which form alarge part of the frame of the car,
are hollow box-section members most of which
are used as ducts to constitute the collection and
upon and packed down by the incoming passen
gers turning into ice, and on some days. builds
20 up to a. considerable depth. This packed snow
and ice makes the footing of incoming passen
distributing means for a heating, and ventilating
’ The spaceunder the ?oor “of the car be
gers less secure and causes them to enter the car
tween the two central cro’ss sills l3 and I4 con
tains the air heating and impelling means for
the system. In this space, on the side of the
more slowly, thus slowing down the operation of
the car. Occasionally, a passenger slips upon the
25 ‘slippery surface and injures himself. In severe
weather it sometimes becomes thick enough to
interfere with or sometimes prevent entirely the
operation of the doors, which in the more modern
cars are arranged to swing inside of the car.
car opposite the steps 25 and 2B, is placed the
blower 21 which circulates the air. In 'cold,
weather, air supplied to the blower 21 is collect
30 - ' One of the principal objects of‘this invention
From this space it passes» down through the pier
ed through openings 28- and, conducted into the
space between the ceiling-29 and the roof 30.
is to provide a means for preventing such an ac
cumulation of snow or ice.
posts‘ l6, l1, l9, 2|, Hand 23, and through the
end cross sills I2 and L5 to the side sill H. The
-' I
More speci?cally it is an object of this inven
side sill I I, which projects slightly, above the ?oor
tion to provide means for melting the snow or . of the car 24, is also providedwith apertures 3|
35 ice upon the steps as rapidly as it accumulates. opening directly into the interior of the. car just
Another speci?c object is to employ a- portion of above the ?oor 24. Air is also withdrawn from
the car heating system as a means for directing the interior of the car through these apertures
a warm stream of air over some of the steps upon ' 3| and joins the air collected through the aper
which such accumulation would ordinarily oc
tures in the ceiling 28.
From the side sill II, the collected air is led
through blocked off portions of the center cross
40 our.
Another object is to provide a body compris
ing sills, cross-sills and pier posts of hollow con
struction to constitute ducts.for warm air, and
to extend these ducts beneath a step in such man
45 ner that the extensions also constitute body
structural members.
sills l3 and It to a chamber 32 containing‘the
blower 21. From this chamber 32, the air is
.forced by the blower 21 into a second chamber
33 containing resistances 34 which heat the air.;
In the ‘embodiment of the invention illustrated,
Other objects and advantages will become here . the resistances 34 are used for controlling the
traction motors 41, only one of which is shown
in the diagram. It will be understood that, in
matter more fully apparent, as reference is bad
50 to the accompanying drawing, wherein my in
vehtion is illustrated and in which, '
' Fig. 1 is a diagrammatic perspective view of I
the parts of the car necessary for a clear un
derstanding of this invention. with parts broken
55 away to more clearly show their structure,
the case of a rail vehicle, the motors are carried
by trucks, not shown.
The heated air then ?ows from the chamber
33 through the cross sills l3 and II to the side -
sill III which. servesv as a distribution duct. The 5.5
9,130,131 '
side sill "ll projects slightly above the ?oor 2t
ity inside‘ of them. The warm air directedin
and is provided with a series of apertures 35 out side of the stair wells by this arrangement mixes
of which the warm air can flow into the interior
the cold air which leaks in around the doors,"
of the car. Dampers It are provided in the walls with
warming it and preventing the portions of the
ofthecrosssills II and lltosendthewarmair car near the door from being chilledby- the air 5
to the outside of the car instead of - to the inside which has in?ltered.
_ 1
as may be desired. vThese dampers 36 are con
While I have shown only the preferred em
trolled manually or‘ by suitable thermostatic
means, so that the temperature of the interior ' bodim'ent of my invention, windy-‘which part 08 the
energy- dissipated as heat in
e operation of a
street car motor is used to melt the snow, my 10
10 of the car is maintained within a given range.
In severe winter weather‘, 'when- the heat pro
invention, in its broader aspects, contemplates
vided by the motor'resistors I4 isnot sufficient
other sources of heat'and other means of apply
ing it and is limited only by the scope of the
to heat the car, additional heat 'is provided by
extra resistances 31 placed in the side silly II
accompanying claims.
15 which serves as the warm air duct. The v: << : e
I claim:--
of current through the ‘extra resistances 31 is
"1. In a vehicle, an entrance or exit step, a
also controlled ‘by suitable thermostatic means.- ~ wall rising above said step, ‘a warm air chamber
It will be noted that in the heating and venti
lating system as described thus far, warm air‘ is
'20 conducted by the cross sills l3 ‘and It to ‘both
ends of the steps II and 28 at the center of the
on the other side of said wall from said step,
and apertures in said wall, said apertures being
shaped so as to direct said warm air down upon
car, and that warm air is conducted by the side ,
,sill II to the rear end of the front steps 30 and
38. My invention contemplates the use of this
warm air in any manner to melt snow that may
accumulate upon the steps 25, 26, 18, or 39. This
may be accomplished by‘extending the air ducts
under thesteps so as to heat the steps 25, 28, 38
2. In a vehicle
sills and steps between said cross sills, means for
supplying warm air to the interior of said cross
sills, and a duct below one of said steps, said
duct extending between and being connected to‘
the interior of said sills, the top and one sidewall
respectively of said duct forming the tread sur
face of one of said steps and the ‘riser for the
and 39 from underneath: A more eii'ective means
is to direct warm air, either from the end of the step therebelow,
said riser having vents there'-_
steps or from the risers directly onto the surface
of the steps” ‘In the particular embodiment of
3. 'In_ a vehicle having a pair of hollow cross
the invention‘ by which I have chmn to illus
trate this invention, 1, have provided a duct ll sills, means for supplying; warm air to the inte
extending lengthwise of the car between the two - rior of said cross sills, a step between‘ said cross
central cross sills II and I4 and just below the sills, a duct extending between said cross sills in
vsaid step and means for discharging
upper step 28 and in back of the riser 4| at the back of
air from said cross sills onto said step.
back of the lower step 2!. The riser 4|, which warm
A. In a'vehicle having a hollow side sill form
forms one of the ‘side walls of the duct ‘I, is pro
vided' with apertures 42 adapted to direct the air ing a warm air .duct of a. heating and ventilating
onto the surface of the lower step 25. If the riser system, ‘a hollow pier post and a hollow cross sill
‘I is made of sheet metal, the apertures 42 can forming'a collecting air duct of said system, and
be inverted louvres, as shown clearly in I'ig.' 3.
At the i'r'ontof the car a diagonal partition 48
cuts oi! the corner of the space in‘ the intersec
tion of the front pier post It and the front cross
sill II. The partition 43 provides a
leading ‘from the'end of the warm air duct it to
a duct 44 under the upper front step II and in
back of ‘the riser between the steps 3| and I9.
.> The duct 44 and the riser ll are arranged "in the
samemannerasthe duct llandriserllin the
steps at the center of_thecar.-
with this arrangement, the steps It and 4!
an entrance or exit step on the other side of said
pier post and cross sill from said sidesill, the
combination 01' a duct leading from the end of
said side‘sill and under said pier post and said
cross sill and along the back of‘ said step, and
means for conducting air from said duct onto'
said step.
5.-In a vehicle-having a hollow side sill form
ing a warm air duct of a heating and ventilating
'a hollow pier‘ post and a hollow cross
sill connected together at‘the'end of saldside ‘
sill and in line therewith and, forming ‘a returp
air duct, and an entrance step on the ‘other side
of said pier post and cross sill fromgsaid side sill, ,
the combination of a partition in the intersec
steps will'be melted. '
tion of said pier postand side; sill and sloping
down towards the center line of the vehicle, said
partition leaving the interiors of said pier post‘
and said side sill in communicaiiongwith each
other and de?ning a small separate chamber
directcontact with the warm air ?owing out
and-ll. Thecurrentoi'warmairalsoservesto
some extent,'to evaporate the moisture resulting communicatingwiththeendofsaidside sill,'and
from the melting of the snow, thus simultane
means for
said steps. ,
a pair of hollow\cross _
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