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Патент USA US2110547

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Mar@
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H. s. ECKERSON ¿fr AL
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TIVE
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DEVICE
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Filed Jan.V 26, 1937
‘Hmm’ îwîïglmvamoras
Patented Mar. 8, 1938
2,110,547
UNITED -STATES
PATENT orFlc-E
2,110,547
MOVING STAIRWAY PROTECTIVE DEVICE
Harold Irving Eckerson, Flushing, Maurice Fred
erick Finn, New York, and Samuel Gustave
Margles, Brooklyn, N. Y., assignors to Otis Ele
vator Company, New York, N. Y., a corporation
of New Jersey
Application January 26, 1937, Serial No. 122,388
6 Claims.
The invention relates to moving stairway pro
tective devices.
In a moving stairway installation, the step
treads are usually provided with a plurality of
longitudinally extending cleats. Comb plates are
provided at the ends of the stairway, the teeth
of thev comb plates extending into the grooves be~
tween the cleats and being inclined upwardly
therefrom to facilitate the exit of passengers
from the stairway. Clearance is allowed for
manufacturing purposes between the underside
of the comb plate teeth and the bottom of the
tread grooves and between the underside- of the
. comb plate platform and, the top of the cleats.
It is the object of the invention to iill in or
close the space between the comb plate teeth
and the bottom of the tread grooves and between
the comb plate platform and the top of the cleats
2O
, in such way as to permit free movement of the
‘treads beneath the comb plate and at the same
time resist the pressure of anything which the
tread tries to carry along with it underneath the
comb plate or which it is attempted to force
thereunder.
-
In carrying out the invention, material is se
cured to the underside of the comb plate in the
space between the teeth and the tread grooves
and in the space between the underside of the
comb plate platform and the top of the cleats.
30 This material is tough and firm, so as effec
tively to resist the passage under the comb plate
of anything' carried by the step tread and yet it
is comp-ressible or deformable and elastic so as not
to damage the step treads as they pass beneath
This material may be applied in
the form of strips which extend to the forward
edge of the comb plate teeth and platform and is
preferably of a thickness to completely ñll these
35 the comb plate.
spaces.
40
Features and advantages of the invention will
be apparent from the specification and appended
claims.
»
tical adjustment of the toothed end of .the comb
plate.
Referring also to Figures 2 and 3, each step
comprises a step fram-e i5 to which is secured a
tread plate it usually made up of a plurality of
sections. The tread plate is formed with a plu
rality of longitudinally extending cleats ll. The
comb plate is provided with a plurality of longi
tudinally extending teeth it which are in sta.,
gered relation with the cleats so as to extend into 10
the tread grooves 2t. The forward ends 2| of
the teeth are below the top of the treads and
slope upwardly back to the comb plate platform
22, emerging from the treads before the platform
is reached. This facilitates the passengers leav
ing the stairway, gradually forcing the feet of a
person from the tread onto the comb plate plat
form in the event he neglects to step from the
tread as the end of the stairway is reached.
Clearance is provided between the teeth of the 20
comb plate and the bottom of the tread grooves
and also between the top of the cleats and the
underside of the comb plate platform. The clear
ance between the comb plate platform and the
tops of the cleats may be greater than that be 25
tween the teeth and the bottom of the tread
grooves for certain types of moving stairways,
because of the possibility of a tilt of the step as
it enters the comb plate, due to the weight of a
passenger being concentrated on the rear of the 30
step. Such clearance difference has been illus~
trated, but it is to be understood that the amount
of clearance at these points depends upon the
form of stairway construction and may be the
same.
In the drawing:
the teeth, strips 25 being preferably bevelled
Figure 1 is a view in perspective of a portion of
upwardly at their forward ends as indicated in
Figure 2. It is to be understood that the strips
24 may also be bevelled upwardly at their for
ward ends if desired. These strips are preferably
of a thickness to take up the space respectively
between the teeth and the bottom of the tread
grooves and between the underside of the comb
45 a moving stairway showing the comb plate
equipped with protective means in accordance
with the invention;
Figure 2 is a View in vertical section of the
arrangement of Figure 1 taken between the teeth
50
of the comb plate, illustrating cleats of a step
tread passing beneath the comb plate; and ‘
Figure 3 is a section taken along the line 3--~3
of Figure 2.
Referring to Figure l, It is the balustrade on
55
one side of the upper end of an ascending stair
way. The steps of the stairway are designated l I,
While the comb plate is designated I2. The comb
plate is hinged as indicated at I3 by a tongue and
60 groove joinder to the floor plate I4 to permit ver
35
To minimize this clearance, a guard is provided
beneath the comb plate. This guard is illustrated
as in the form of guard strips 24 secured to the
underside of the comb plate teeth at the forward
ends thereof and guard strips 25 secured to the 40
underside of the comb plate platform at the for
ward end thereof Vand in the grooves 23 between
plate platform and the top of the cleats. It is
preferred that these strips be of a material which
is firm and tough so as to resist the pressure
of anything which the tread tries to carry along
with it underneath the comb plate or which it
is attempted to force thereunder, but which is
also compressible or deformable so that it Will
be squeezed together rather than cut or sheared
by any tread which, due to irregularities of man
ufacture, assembly or wear in operation, is higher 60
2
2,110,547
than the others, and resilient so as to return to
its former condition after the step has passed
beyond. Also, it is desirable that the material
be such that it can be given a fairly tight fit ini
tially and worn down to the desired size.
Felt has been found to be a suitable material
of which to form these guard strips.
strong felt is preferable.
A tough,
The strips may be se
cured to the comb plate by cementing them
10 thereto. In the case of the strips 25, they may
be secured to the sides as well as the tops of the
tread groove into which the tooth extends.
fl. Protective means for a moving stairway of
the type in which the tread of each of the steps
has a plurality of longitudinally extending cleats 10
comb plate grooves, permitting a cheaper grade
and in which a comb plate having a plurality of
teeth for meshing with said cleats extending
of felt to be used.
llongitudinally beneath the comb plate platform
In an arrangement which
of the felt utilized in the teeth grooves are ar
to form grooves therein to receive said cleats
is provided at the exit end of the stairway com 15
ranged vertically whereas those beneath the
comb plate teeth are arranged horizontally.
tic material, one for each of said grooves, se
has been found suitable in practice, the layers
Leather or rubber of a grade and composition
having the above properties may also be used.
ln case rubber is employed, it may be secured to
the comb plate by vulca-nizing it thereto. Other
material having- properties such as those above
indicated may be used.
Although the guard strips have been described
as applied to the comb plate at the upper end of
an ascending stairway, it is to be understood that
they provide the same protection when utilized
in connection with the comb plate at the lower
end of a descending stairway. ln the case of
.reversible moving stairways, these strips are pro
vided at both ends of the stairway.
As many changes could be made in the above
construction and many apparently widely differ
ent embodiments of this invention could be made
".vithout departing from `the scope thereof, it is
intended that all matter contained in the above
description or shown in the accompanying draw
ing shall be interpreted as illustrative and not
in a limiting sense.
What is claimed is:
i.. A protective device for a moving stairway
of the type in which the tread of each of the steps
has a plurality of longitudinally extending cleats
and in which a comb having a plurality of longi
45 tudinally extending teeth for meshing with said
.eats is provided at the end of the stairway
comprising, means secured to the underside of the
comb beginning at the forward edge of the teeth
and extending rearwardly therefrom and sub
stantially ñlling the space between the bottom
o the comb and said treads, said means being
o a material and shape to permit free passage
ci the treads under said comb but to resist the
passage thereunder of things carried by said
55 treads.
2. Protective means for a moving stairway of
the type in which the tread of each of the steps
has a plurality of longitudinally extending cleats
and in which a comb plate having a plurality of
60 longitudinally extending teeth for meshing with
said cleats is provided at the exit end of the
stairway comprising, deformable elastic material
secured to the underside of the comb plate plat
form and extending rearwardly from the for
65 ward edge of said platform in the space between
the underside of said platform and the top of
the cleats.
3. Protective means for a moving stairway of
the type in which the tread of each of the steps`
70 has a plurality of longitudinally extending cleats
and in which a metal comb plate having a plu
rality of longitudinally extending metal teeth for
75
strips of deformable elastic material, one for
each of said teeth, secured to the underside
thereof beginning at the forward edge of the
metal tooth and extending rearwardly therefrom
and substantially filling the space between the
underside of the tooth and the bottom of the
meshing with said cleats is provided at the exit
end of the stairway comprising, a plurality of
prising, a plurality of strips of compressible elas
cured to the underside of said platform in said
grooves and extending from the forward edge of
said platform in the spaces between the bottom 20
of said grooves and the top of the cleats.
5. Protective means for a moving stairway of
the type in which the tread of each of the steps
has a plurality of longitudinally extending cleats
and in which a comb plate having a plurality of 25
teeth for meshing with said cleats extending 1on
gitudinally beneath the comb plate platform to
form grooves therein to receive said cleats is
provided at the exit end of the stairway com
prising, a plurality of strips of compressible elastic 30
material, one for each of said teeth, secured to
the underside thereof beginning at the forward
edge of the teeth, said strips being of a thickness
to take up the space between the underside of
the teeth and the bottom of the grooves between 35
the cleats, and a plurality of additional strips
of compressible elastic material, one for each
of said grooves in said comb plate platform se
cured to the underside of said platform in said
grooves therein and extending from the forward
edge of said platform, said additional strips being
of a thickness to take up the space between the
bottom of said platform grooves and the top of
the cleats.
6. A moving stairway comprising; a plurality
of steps, the tread of each of said steps having a
plurality of longitudinally extending cleats; a
comb plate at the exit end of the stairway, said
combi plate having a body portion and a plu
rality of teeth meshing with said cleats, said teeth 50
extending longitudinally beneath said body por
tion to form grooves therein to receive said
cleats; a plurality of felt strips, one for each of
said teeth, cemented to the underside thereof be
ginning at the forward edge of the teeth and 55.
extending rearwardly, said strips being of a thick
ness to take up the space between the underside
of the teeth and the bottom of the grooves be
tween the cleats; and a plurality of additional
felt strips, one for each of said grooves in said 60
body portion, cemented to the underside of said
body portion in said lgrooves therein beginning at
the forward edge thereof and extending rear
wardly, said additional strips being of a thick
ness to take up the space between the bottom of
said grooves in said body portion and the top of
the cleats, each of said additional strips being
bevelled at its forward end so as to deflect any
thing resting on the top of a cleat onto the
comb plate body portion as the tread passes un
der the comb plate.
HAROLD IRVING ECKERSON.
MAURICE FREDERICK FïNN.
SAMUEL GUSTAVE MARGLES.
70
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