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Патент USA US2124804

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July 26, 1938.
J_ KNlGH-r
' Filed Feb. 11,’1938
Patented July 26, 1938
John Knight, Chester, Pa.
Application February 11, 1938, Serial No. 190,110
1 Claim.
This invention relates to railway switches, and
has for its main object the provision of a switch
possessing the characteristics of safety and cer
tainty in action, dependability in use, and the
5 elimination of failure to operate properly which
has been the cause of many derailings and wrecks.
The switch is designed to operate without the
use of the usual pivot for the frog and thereby
avoids the dangers which may result from loosen
10 ing or wearing of the pivot.
The above and other objects will become ap
parent in the description below, in which charac
ters of reference refer to like-numbered parts in
the accompanying drawing, forming a part
15 hereof.
Referring briefly to the drawing, the ñgure is a
plan view of a railway switch and the mechanism
for throwing the same.
Referring in detail to the drawing, the numeral
20 Ill represents one rail and the numerals II and
II a represents the other rail of a track section,
and the numerals I2 and I3 the curved rails of a
switch out track section.
The former are se
cured to the ties, not shown, by the usual bolts or
25 spikes I4 placed at spaced apart intervals along
the rails.
'I‘he rail II terminates at the switch in an
extension tongue or frog I5, integral with the
rail II, which at its base is concavely rounded
30 on one side at I6 and convexly on the other side
I'I. The concavely rounded side I6 at the base
of the tongue I5 provides a socket, in which the
complementarily rounded extremity I8 of the
rail IIa normally registers, that is, when the
35 switch is open. At its extremity the tongue I5
is provided with a ñat face I9 at an angle to the
sides of the tongue. The curved rails I2 and I3
are secured by bolts 2| to plates I9 and 20, re
spectively, these plates in turn being secured on
40 the ties, not shown, at the switch. The entire
curved section I3 shown is rigidly secured by the
said bolts to the plate 20, but the section I 2 is se
cured through part of its length only so that its
end tongue 23 beyond the point 22 is free to swing
45 and ride on its plate I9.
The rail I la: is rigid on its ties and on the plate
20 up to the point 24, which is secured to the plate
20 by bolts 25, and the rail beyond the point 24,
including the tongue I5, is free to swing about the
50 point 24 as a pivot, on the plate 2D.
(Cl. 246-434)
The switch throwing mechanism comprises the
crank 28, the shaft 29 rotatably supported irl`
standards 30, and the oppositely disposed U
shaped bends or cranks 3| and 32 formed in the
shaft 29. A lever 33 is pivoted at one end to the
crank 3| and at the other end to the side of the
tongue 23. Likewise, a lever 34 is pivoted at one
end to the crank 32 and at the other end to the
side of the tongue I5. The manually operated
switch throwing mechanism just described is for 10
purposes of illustration only, as any other suitable
mechanism, whether manually or mechanically
operated, may obviously be used for the purpose
of throwing the switch.
With the switching mechanism in the posi
tion shown, a train on the rails I0 and II-I Ia
will pass straight along these rails, as the switch
is open. When the crank 28 is thrown so as to
cause a train to be switched from the rails I0 and
Il to the curved rails I2 and I3, the cranks 3|
and 32 will assume positions directly opposite
to those shown, the end of the rail I I beyond the
point 24 will be bent into the position shown in
broken lines, and at the same time the tongue
23 will be urged ñush against the rail I0. The
end of the rail II will bend freely about the
point 24 as a pivot, and the section I 6 will likewise
bend freely about the point 22 as a pivot. When
the tongue I5 is in the position shown in dotted
lines, the end faces I9 and 26 will lie in mutual
engagement and the face 26 will serve as a limit
stop to the outward swing of the tongue I5.
Obviously, modifications in form and structure
may be made without departing from the spirit
and scope of the invention.
I claim:
In a railway switch adapted to operate in con
junction with the two rails of a straight ahead
track, a pair of curved rails forming part of the
switch, one of said straight rails being divided
into two sections, one of said sections having a
tongue extension thereon overlapping the other
of said two sections, said tongue extension being
pliable, one of said curved rails extending toward
said one straight rail, the other of said curved
rails extending toward the other of said straight
rails and having its end free and pliable, switch
control means connected to said other curved
rail and to said tongue extension for simulta
neously bending said free end of said other curved
rail and said tongue extension in mutually op
posite lateral directions from a position in which
The extremity of the curved rail I3 is also pro
vided with an angular face 26 which is comple
mentary to the face I9 of the tongue I5. The > said free end of said other curved rail lies against
rail IIa is also held rigid by the bolts 25a and said other straight rail and said tongue extension
55 spikes I4.
lies clear of said other section of said one straight 55
rail into a position in which said free end of said
other curved rail lies clear of said other straight
rail and said tongue extension lies against the
end of the other section of said one straight rail,
and vice versa, said tongue extension being con
cavely rounded to form a socket at its base, said
end of said other section of said one rail beingl
complementarily rounded to register in said sock
et when said tongue extension lies in position
against said other section of said one rail.
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