close

Вход

Забыли?

вход по аккаунту

?

Патент USA US3085758

код для вставки
April 16, 1963
PL s. MAIQGRAF
3,085,748
ONE-PIECE PLURAL SIZE RAIL ANCHOR
Filed Dec. 12. 1960
2 Sheets-Sheet 1
22
INVENTOR.
BY
i2
April 16, 1963
Rs. MARGRAF
3,085,748
{ONE-PIECE PLURAL SIZE RAIL ANCHOR
Filed Dec. 12. 1960
’
,
I
2 Sheets-Sheet 2
1
i0“
33“
g
i3
3” ga
.29
@5 E0CO.MP=6NFE9T2
VERTICAL
HORIZONTAL
COMPONENT -_ 0. 7257 or F
E
<1‘?
Uk
EE
INVENTOR.
?tates
"me
3,li85,748
Patented Apr. 16, 1963
1
2
3,085,748
anchor device constituting rail gripping levers thereof are
varied in respect to their effective lengths and thereby
ONE-PIECE PLURAL SIZE RAHL ANCHOR
Philbert S. Margraf, Elkhart, Ind, assignor to Poor &
Company, Chicago, Ill., a corporation of Delaware
Filed Dec. 12, 1960, Ser. No. 75,285
5 Ciaims. (Cl. 238-33@)
increase the rail gripping force exerted on rail base por
tions of larger size.
A preferred embodiment of the invention is illustrated
in the accompanying drawings wherein:
FIG. 1 is a side view in elevation of a one-piece rail
anchor device, constructed in accordance with this inven
The present invention relates to a one-piece rail anchor
tion, applied to the base portion of railway rail of one
device made from low carbon steel bar stock and adapted
to be ?exed into resilient gripping engagement with the 10 size classi?cation in a position to abut against an under
lying crosstie on which the rail is supported;
base portion of a railway rail in a position to abut against
FIG. 2 is a plan view of the structure shown in FIG. 1;
an adjacent vertical face of a crosstie and thereby resist
FIG. 3 is a view partly in elevation and partly in sec
longitudinal creeping movement of the rail relative to
tion looking at the end of the rail anchor device from the
the crosstie.
,
It is current practice in the production of one-piece 15 position of line 3—3 in FIG. 1;
rail anchors of the above general class to form the anchor
device for application to a railway rail having a base
portion of a de?nite width and thickness. It is also im
portant to maintain close tolerances in the construction
.
FIG. 4 is a view similar to FIG. -1 but illustrating the
‘improved anchor device applied to a base portion of a
rail of larger size classi?cation than the base portion
shown in FIG. 1;
‘FIG. 5 is a diagram showing the vectorial component
of the anchor device so as to insure a tight resilient grip 20
forces exerted by the rail anchor device when it is ap
of the device on the rail and, at the same time, avoid
plied to a rail base of the size shown in FIG. 1; and
FIG. 6 is a similar diagram illustrating the vectorial
component forces exerted by the anchor device when it
as heretofore proposed, are limited in their use to rail 25 ,is applied to a larger rail base as shown in FIG. 4.
Referring ?rst to FIGS. 1, 2, 3 and 5 of the drawings:
sections having base portions of a speci?ed size classi
19 designates a railway rail base portion of a predeter
?cation, some efforts have been made, heretofore, to
mined width and thickness. It is seated on a rail sup
produce a one-piece anchor device composed of low car
porting structure comprising a conventional tie-plate 11
bon steel and having su?icient versatility to resiliently
grip rail bases of different size classi?cations. However, 30 and a wooden crosstie ‘12 underlying the tie plate and
the rail. Conventional rail spikes 13, driven into the
in spite of the desirability for a plural size rail anchor,
over?exing of the anchor device during its application to
its applied position on the rail.
Inasmuch as rail anchors of the above general class,
the various one-piece anchor constructions heretofore
‘crosstie through spike openings ‘14- formed in the plate,
serve, in cooperation with spaced apart shoulders 15 on
proposed for application to rail bases of different widths
the tie plate, to maintain the rail base on said support
and thicknesses have not been entirely satisfactory, since
if they are made to provide an adequate resilient grip 35 ing structure with capacity for slight vertical movement
of the rail base relative to the tie plate.
for a rail base of one size classi?cation, they are nor
The improved rail anchor of the present invention is
mally overflexed and, therefore, weakened by their ap
designated generally by the reference numeral 16'. It is
plication to rail bases of larger size classi?cations.
shown clamped to'the rail base 10 in a position to abut
A principal object of the present invention is to pro
vide an improved anchor of the above general class 40 against one vertical face of the crosstie 12- and servesto
prevent the rail from creeping in one direction across
adapted to be made from bar steel having a low elastic
the rail supporting structure.
limit, but which, in addition to presenting the recognized
The improved anchor is designated as a whole by the
general advantages of a plural size one-piece rail anchor
reference numeral 16 and comprises a rolled metal bar,
such as making it no longer necessary to maintain large
45 preferably of rectangular con?guration, formed at one
inventories of rail anchors of ?xed sizes, each being de
end with a curved end loop 17 of sui?cient diameter to
signed to fit only a rail base of special size, provides a
extend around one ?ange 18 of the rail base 10, but with
novel construction whereby the anchor device can be
substantial clearance both above and below the top and
?exed to its applied position on railway rails having base
?anges of different widths and thicknesses Without ex 50 bottom surfaces of said base ?ange 18 so that the loop
'may be moved freely in a vertical plane about this ?ange
ceeding the elastic limit of the anchor device.
to vary the angular position of the anchor device during
The present invention attains the above objects by so
‘its application to a rail. The terminal end of the loop
forming the anchor device that it can be applied to rail
17 is upset to form an enlargementconstituting a head
sections of different sizes, Within a prescribed classi?ca
19 which is formed with a curved bearing surface 20
tion range, without subjecting the anchor to appreciably
which seats on the ?llet 21 located at one side of the
different amounts of overall ?exing during its application
rail at the junction of the vertical web 22 with the base
to rail bases of different size classi?cation. The anchor
‘portion 19‘ from which the anchor is formed.
device also presents a further unexpected advantage in
The said loop 17 extends a substantial distance below
that even though it is not subjected to appreciably dif
the top surface of the crosstie 12 and provides tie abutting
ferent amounts of ?exing to apply it to rail bases of dif
‘portion of substantial area located at one side of the rail.
ferent size classi?cations, it will exert a desirably in
The loop includes a curvilinear under-rail portion which
creased gripping force on the rail section of larger size
merges into a straight under-rail portion 23 extending
classi?cation and thereby supplies additional gripping
to the opposite side of the rail base. This straight por
force to resist the greater creeping pressures-which are
normally exerted by the larger rail section, since they are 65 tion 23, when the anchor is applied to a rail base of the
subjected to more tra?ic than the smaller rail. This in
width shown in ‘FIG. 1, provides a frictional face 24 of
the area indicated by the multiple arrows 25 for engag_
creased gripping force is obtained not by increasing the
ing the bottomsurface of the rail base ?ange 26. The
distortion or ?exure or" the anchor device during its in
stallation on the larger rail, but rather by altering its
terminal end of the under-rail portion 23‘ is formed with
angular position relative to the rail base and thereby alter 70 an uppressed locking shoulder 27 for engaging the edge
the angularity of the center line of thrust through a termi
face 28 of the base ?ange 26 to lock the anchor device
in its applied position on the small size rail base 10
nal bearing of the anchor, whereby the portions of the
3,085,748
3
4
shown in FIG. 1. The said terminal end of said under
fore, the like parts of the rail anchor illustrations are
identi?ed by the same reference characters in all ?gures
of the drawings. The speci?c width G and thickness H
of the rail base 10a are 6 inches and 13/16 inches, respec
tively. In order to facilitate application of the rail
rail portion 23 is also provided with a locking lug 29
which projects above the top surface 30 of shoulder 27
and is adapted to engage an edge surface of a rail base
of larger size classi?cation, for example the rail base
shown in FIG. 4. The construction and function of the
locking lug will be further described hereinafter in con~
nection with FIG. 4 of the drawings.
Operation
anchor device to the larger size rail base 10a, the dis
tance C between the vertical face of the shoulder 27
and the vertical face 34 of the locking lug 29 is equal to
the difference in the width of the rail base 10‘ and the
The loop end 17 of the anchor device is hooked over
It will also be observed that the vertical
face 34 of the locking lug 29 is inclined inwardly at an
a rail base ?ange with the rail gripping head 19 thereof
engaging an arcuate area 31 of the ?llet 27. In this posi
10 rail base 1011.
angle relative to the top face 31 of vertical face 27 so
that the shoulder 34 will fit ?ush against the edge surface
tion of the anchor, the under-rail portion 23 thereof
33a of the rail base when the anchor is applied to the
will be biased upwardly by the greater weight of the loop 15 larger size rail. However, in order that the anchor device
end of the anchor until the top inner edge 32 of shoulder
may be applied to the larger size rail base without greater
27 engages the bottom surface of the rail base ?ange 26
?exing of the loop transversely of the rail and without
in the region of the vertical edge surface 33 of the rail
greater expansion of the open end of the loop 17 than the
base. The loop end v17 is then struck with sufficient im
corresponding ?eXure and expansion of the loop when
pact force by means of a suitable impact implement, 20 applied to the smaller rail base section shown in FIG. 1,
such as a sledge or track maul, to ?ex the loop in a direc
the height D of shoulder 27 is such as to maintain the
tion to force the straight under-rail portion 23 of the
anchor device at an appropriate angle whereby the ex
anchor transversely of the rail base until the locking
pansion of the open end of the loop, when the anchor is
shoulder 27 clears the edge 33 of the base. When this
applied to the larger size rail base, will be the same as
occurs the force thus applied to the anchor device im
the expansion of said loop when the anchor is applied
parts a counterclockwise downward rolling movement
to the smaller size rail base shown in FIG. 1. In this
to the curved terminal bearing surface '20‘ along the
connection it will be observed that when the anchor de
curved surface of the ?llet 21 and thereby rocks the
vice is applied to the larger size rail base 10a the anchor
anchor, as a whole, until the locking shoulder 27 snaps
is turned in a vertical plane about the base ?ange embraced
up into locking engagement with the edge surface 33 of 30 to a position wherein the bottom surface of the rail base
the rail base ?ange 26. This upward movement of the
is engaged only by the top of the locking shoulder 27 and
locking shoulder end of the anchor device also moves
at a point 35 on the curved under-rail portion of said
the top face of the straight under-rail portion 23 into
end loop 17 intermediate said terminal bearing 20 and the
?at frictional contact with the bottom surface of the rail
point of tangency of said friction face 24 with the curved
base ?ange 26.
35 under-rail portion of said loop 17. It will be further
When the anchor is in its applied position, the princi
observed that the latter bearing point of the anchor, when
pal gripping force is produced by the resilient reaction
the face 24 is in a horizontal position (see FIG. 1) ex- j
of the tensioned loop 17 and this force is directed di
agonally downwardly through the rail base. The center
tends below said point of tangency and extends above
said point of tangency when the anchor is turned about ‘
line of this diagonal thrust will, of course, be normal
the rail base ?ange 10a to said angular position. Also
to the arc of the bearing surface 20 engaged with the ?l
the top surface 30 of the shoulder 27 assumes an acute
let 21 of the rail. This center line of thrust, for purpose
angle relative to the bottom surface of the rail base so
of illustration, is indicated at F in FIG. 1. The total
that the shoulder 27 bears only at its upper corner 32
gripping force of the anchor device as installed in FIG. 1
against the bottom surface of the rail base 10a.
of the drawings is indicated diagrammatically in FIG. 5 45
It will be also observed that by virtue of the angular
of the drawings. The angle of the center line of thrust
position of the anchor device on the rail as shown in
F will, of course, vary for rail bases of different widths
FIG. 4, the rounded bearing surface 20 at the terminal
and thicknesses, since the rail anchor assumes different
end of the hook is rolled upwardly on the ?llet 21a of
angular positions on the smaller and larger rail sections,
the rail base 10a so that the center line of thrust F’
respectively. Considering the rail base 10 as having a
through the terminal end of the loop assumes the angular
predetermined horizontal width A and a predetermined
position shown in FIG. 1, whereby the altered position of
thickness B, the straight portion 23 of the anchor will
the terminal bearing in combination with the bottom
assume a horizontal position with its friction face 24
bearing 35 accommodates the greater thickness of said
bearing ?at against the bottom surface of the rail base.
rail base 10a without increasing the expansion of the
Consequently the angle of the center line of diagonal 55 end loop 17. In such case the line F’, being normal to
thrust will vary for rails of different widths and thick
the arc 31a of the bearing surface 20 bearing against
nesses. In the speci?c installation shown in FIG. 1, the
the ?llet 21a and corresponding to the center line of force
width A and the thickness B of the rail base are 51/2
which is directed diagonally downward through the rail
inches and 1% inches, respectively, and the center line
base, extends at an angle of 33° relative to the bottom
of diagonal thrust F extends downwardly at an angle of 60 face of the rail base. Consequently the horizontal com
43°40’ relative to the bottom surface of the base. Con
ponent of the total grip (see FIG. 6) has a vectorial
sequently the effective lengths of the portions of the
value of ‘0.83% of the diagonal force F’ and the vertical
anchor for exerting the grip on the rail are such that the
force component has a vectorial value of 0.55% of the
horizontal component of the total grip (see FIG. 5) has
diagonal force F’.
a vectorial value of 0.725% of the diagonal force F and 65
From the above description it will be observed that
the vertical force component has a vectorial value of
the anchor device when applied to a rail base of the
0.69% of the diagonal force F.
width and thickness shown in FIG. 4 develops a hori
Referring now to the installation shown in FIG. 4 of
zontal grip component which is 11% greater than the
the drawings wherein the rail anchor device shown in
corresponding grip component of the anchor device when
FIG. 1 is applied to a larger rail section, the base of 70 it is applied to a smaller size rail base and this addi
which is designated 10a: This rail base is somewhat wider
tional gripping force is obtained, and thereby provides
and thicker than the rail base 10 shown in FIG. 1. Con
greater resistance to the creeping forces exerted by the
sequently the tie plate designated 11a is made to accom
larger rail, without subjecting the loop portion 17 of the
modate the wider rail base, but the rail anchor device in
anchor device to greater ?exure than is required to apply
both FIGS. 1 and 4 are of identical construction. There 75 the anchor device to the smaller size rail.
3,085,748
6
5
2. A one-piece rail anchor according to claim 1 where
in the top surface of said locking shoulder when the
anchor is turned to said angular position inclines down
wardly and outwardly, whereby its contact with the bot
embracing a flange at one side of any one such rail base CR tom surface of the rail base of larger size classi?cation
is restricted to a location spaced inwardly from said
portion with clearance above and below said ?ange to
I claim:
1. A one-piece rail anchor for resiliently gripping con
ventional railway rail base portions of different size classi
?cations, comprising a metal bar having an end loop for
facilitate movement of the loop thereabout in a vertical
locking lug.
3. A one-piece rail anchor according to claim 2 where
plane and provided with a terminal bearing for seating
in said locking lug is positioned to extend above the
against the ?llet at the junction of said ?ange with the
vertical web of the rail and provided also with a curvi 10 top face of said locking shoulder.
4. A one-piece rail anchor according to claim 3
linear under-rail portion connecting with a straight un
wherein the said locking shoulder has an inner vertical
der-rail portion the upper surface of which is tangent to
face perpendicular to the straight body portion for en
‘a curved under-rail surface of said end loop and con
gaging a vertical edge face of the rail base of smaller
stitutes a friction face extending from its outer end to
size classi?cation and said inner face of the ‘said locking
its point of tangency, the latter of which is located inter
lug is spaced from the inner face of said locking shoulder
mediate the outer end of said friction face and said termi
a distance equal to the difference in width of the rail
nal bearing, for frictionally engaging the bottom surface
bases of said smaller and larger size classi?cations, Where
of a rail base of a selected size classi?cation, an up
wardly projecting shoulder at the outer end of said ‘fric
by the anchor device is subjected to like amounts of
tion face for locking the anchor on said rail base of
?exure during its application to rail bases of smaller
selected size classi?cation and serving also, when the
and larger size classi?cations for which it is designed
anchor is applied to a rail base of larger size classi?ca
to ?t.
tion, to bear against the bottom surface thereof so as to
5. A one-piece rail anchor according to claim 4 where
hold the anchor turned to an angular position about the
in the curvature of the upper portion of the terminal
base ?ange embraced, whereby the anchor in such turned 25 bearing surface is substantially semi-circular so as to
angular position has points for frictionally contacting the
facilitate upward rolling movement on the ?llet of the
bottom surface of said larger rail base only at the top
rail base when the anchor is applied to said rail base
of said locking shoulder and at a point on the curved
of larger size classi?cation.
under-rail portion of said loop located intermediate said
terminal bearing and the point of tangency of said loop 30
References Cited in the ?le of this patent
with said ?at frictional face, which latter point of con
tact, when the anchor is turned to said angular position,
UNITED STATES PATENTS
extends above said point of tangency, and a locking lug
1,746,401
Moore et al ___________ __ Feb. 11, 1930
for locking the anchor in its applied position on said rail
base of larger size classi?cation.
Документ
Категория
Без категории
Просмотров
0
Размер файла
585 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа