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Патент USA US2130837

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sept- 20, 1938.
B. H. BRENNER
2,130,837
PILOT STEP
Filed July 1'7, 1936
9
_
_
INVENTOR:
.5511, amm, 7113122121151’,
Patented Sept. '20, 1938
2,130,837
UNITED STATES PATENT OFFlCE
2,130,837
PILOT STEP
Benjamin H. Brenner, Altoona, Pa., assignor to
The Pennsylvania Railroad Company, Phila
delphia, Pa., a corporation of Pennsylvania
Application July 17, 1936, Serial No. 91,155
2 Claims.
This invention relates to steps for railway ve
hicles and especially to steps of the character
employed at the front end of a locomotive. .
‘ It has long been recognized that there is ad—
5 vantage in providing well rounded smooth sur—
faces at the front end of locomotives and other
railway vehicles, and the considerations entering
into the design of such surfaces have included
the matter of lessening wind resistance with re
' suiting increased speed, the matter of improv
ing the vision of the engineman by assisting the
lifting of the smoke stream issuing from the
stack, and the matter of de?ecting objects struck
by the vehicle away from the track on which it is
1 traveling.
In applying such improvements in
front end design to a conventional steam loco
motive, and especially where a relatively thin
exterior casing is employed at the front of the
vehicle, di?iculties arise with respect to satisfy
20 ing certain safety requirements.
One such diffi
culty is that the usual form of front step breaks
the continuity of the surface, and thus not only
creates an unsightly appearance but also impairs
the function of the casing, both with respect to
25 preventing the formation of eddy currents, and
with respect to de?ecting objects away from the
track.
The principal object of the present invention
is to provide a form of step and a manner of
30 mounting it upon the front end of a vehicle
which overcome the above recited difficulties.
A further object of the invention is to provide
a step which is of simple construction, relatively
inexpensive to manufacture and assemble, and
35 adapted to be swung from a service position in
'which it projects in a substantially horizontal
plane to a housed position in which it lies flush
with the exterior surface of the front end of the
vehicle.
40
Other objects and advantages characteristic of
this invention will become more fully apparent
from the description hereinafter set forth of one
example or embodiment thereof having reference
to the accompanying drawing.
45
Of the drawing:
Fig. I represents a front elevation of a steam
locomotive to which a pair of front steps em
bodying this invention have been applied, one
at each side.
50
Fig. II represents an enlarged cross section,
taken as indicated by the linesII-II of Fig. I,
showing a front step in service or horizontal
position.
Fig. III represents a similar cross section, with
55 certain parts broken away for clearness of illus
(Cl. 105-2)
tration, showing the step in housed or upright
position.
Fig. IV represents a perspective view of the
step with the mounting brackets therefor rep
resented in dot-and-dash lines; and,
Fig. V represents a perspective View of one of
5
the mounting brackets.
With reference to the drawing, there is selected
for typical illustration a steam locomotive hav
ing a rounded nose I and wide sweeping skirt 2 10
in the form of an exterior casing of relatively
thin metal surrounding the body of the vehicle.
The pilot and pilot beam are represented in out
line in Fig. I in broken lines as indicated at 3;
and while the specific construction of the frame 15
of the locomotive is relatively unimportant for
the purposes of this invention, it will be noted
that the steps 4, which are hereinafter more
speci?cally
described,
derive
their
support
through angle bars 5 secured directly to the pilot. 20
As clearly shown in Figs. II and III, the ex
terior casing which forms the skirt 2 is spaced
at a distance from the wall 6 of the pilot. Each
angle bar 5 has bolted rigidly thereto a pair of
brackets 1 which form connections for pivotally 25
mounting a step 4. The particular construction
of the mounting brackets ‘I may, of course, be
varied considerably, but desirably these brackets
have lugs 8 thereon which afford stop shoulders
9, H] for limiting angular movement of the step. 30
In the form illustrated in the drawing, each
step 4 comprises a tread portion II, a riser l2,
and side guards I3, formed as an integral casting.
Trunnions l4 project from each side of the step
and engage corresponding apertures in the 35
mounting brackets ‘l.
The ‘skirt 2 provides a smooth well-rounded
surface extending across the front end of the
locomotive. Openings l5 are provided at each
side of the skirt 2 for the accommodation of the 40
steps 4. Each such opening l5 corresponds in
shape and size to the step 4 associated with it.
Accordingly, when the step 4 is swung to the ver
tical or housed position, it ?lls the opening i 5
and provides a smooth surface continuous with 5
the exterior surface of the casing. On the other
hand, when the step 4 is in the horizontal or
service position, it projects freely through the
opening and substantially beyond the casing. It
will be noted that in the service position the step
is substantially out of contact with the casing 22,
so that the Weight of a person standing thereon
is not communicated to the relatively weak wall
of the casing, but is carried by the relatively 55
2,130,837
2
strong angle bars 5 which form a part of the
pilot.
The stop surfaces 9 of'the brackets 1 limit the
downward movement of the step 4 by engagement
with ledges [6 formed adjacent to the trunnions
It. In like manner the stop surfaces H] of the
brackets ‘l limit upward swinging of the step by
engagement with shoulders IT formed above the
trunnions M. Thus the step 4 is limited to an
10 angular movement of approximately 90°.
Each step a is so mounted and so weighted that
it tends to fall by gravity from housed position
to service position.
To retain the step in its up
right position, a latch i3 is provided immediate
15 ly above the opening l5, such latch including a
?nger piece !9 and a plate 20 which engages
against a slot 2! formed in the outer edge of the
step.
-
It will be observed that the steps 4 are nor
20 mally housed in upright positions, and when so
housed they form with the skirt 2 of the loco
motive smooth uninterrupted surfaces. Thus the
difficulties are avoided which arise when steps
are used which are ?xed in position and project
25 outwardly from the front end of a locomotive.
Such ?xed projecting steps cause the formation
of eddy currents and not infrequently catch ob
jects struck by the locomotive and prevent such
objects from being cast away from the track.
While the present invention has been described
30
with reference to one form thereof, as applied to
a steam locomotive, it .will be'apparent to those
skilled in the art that this invention has many
other applications, and that various departures
35
may be had as to the form of ‘the step and the
manner of its mounting, without departing from
the spirit of the invention as de?ned in the an
nexed claims.
Having thus described my invention, I claim:
1. Ina railway vehicle including a frame and
a relatively thin exterior casing spaced therefrom
in surrounding relation, said casing having an
opening therein unreinforced at its edges, a, sup
porting element attached to the vehicle frame
and located entirely within said exterior casing
and disassociated from it, a step supported whol
ly on said supporting element and having a piv
otal connection therewith, said step being adapt
ed to fall by gravity from a vertical position,
wherein it ?lls the opening aforesaid and pro
vides a surface continuous with the exterior shell
to a horizontal position wherein it projects
through said opening in the exterior shell sub 1O
stantially beyond the exterior surface thereof, an
externally operable latch means for holding said
step in its vertical position, and stops associated
with said pivotal connection and engaging sur
faces on said step to limit the angular movement 15
of said step between said vertical and said hori
zontal positions.
'
2. In a railway vehicle including a frame and
a relatively thin exterior shell spaced therefrom
in surrounding relation, said shell having an
opening therein unreinforced at its edges, a sup»
porting element attached to the vehicle frame
and located entirely within said exterior shell
and disassociated from it, a step supported whol
ly on said supporting" element and having a piv 25
otal connection therewith, said step being adapt
ed to fall by gravity from a vertical position,
wherein it ?lls the opening aforesaid and pro
vides a surface continuous with the exterior shell
to a horizontal position wherein it projects
through said opening in the exterior shell sub
stantially beyond the exterior surface thereof,
an externally operable latch means for holding
said step in its vertical position, and stops asso
ciated with said pivotal connection, one of said
stops contacting said step in its horizontal po
sition and preventing downward movement there
of, and an additional stop contacting said step
in its vertical position, and preventing backward
movement thereof, said latch means when op
erated serving to hold said step tightly braced
against said additional stop.
-
BENJAMIN H. BRENNER.
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