AN IMPROVED RAILWAY CHAIR
Year: 1885

page_text: I, WILLIAM WALKER, of Saltburn-by-the-Sea in the County of York, Mining
Engineer, do bereby declare the nature of my invention for "AN IMPROVED
RAILWAY CHAIR" to be as follows:-
My invention has for its object the construction of a railway chair that shall
hold the rail securely without the use of keys or wedges.
+
For this purpose I divide. the chair in a diagonal direction into two parts, each.
of which has a jaw formed to fit against the sides of the rail; flanges or lugs are
formed along the diagonal edge of each part, through which pass screw bolts by
which the two parts are secured together. In the base plate of each part are
formed two bolt holes; one of these is circular so as to receive a spike, coach
screw or screw bolt by which it is secured to the sleeper, these holes being in the
diagonally opposite corners of the two parts: The other two bolt holes are slotted
so as to allow of the removal of the rail as will be presently described.,
It will be seen from the above construction that on tightening up the bolts
passing through the diagonal flanges or lugs, the two parts of the, chair will be
forced together in opposite directions at an angle to the line of rail, whereby the
jaw of each part will be made to approach the side of the rail until they nip the
rail firmly between them, care being taken that when the jaws touch the rail,
there shall still be a certain amount of play between, the diagonal flanges of the
parts, so as to insure a firm hold of the rail. The diagonal edge of the base of
the one part of the chair is by preference formed with one or more projections that
enter a corresponding recess or recesses on the edge of the other part so as to
prevent any side movement of the two parts when fixed.
For removing the rail from the chair, the screws, spikes or bolts, in the holes
that are not slotted are withdrawn, whereupon the slotted holes of the other bolts
will allow of the two parts being separated sufficiently from each other to enable
the rail to be taken out.
!:
In employing-this construction of railway chairs, the necessity of fish plates; as
now applied may be dispensed with..

page_text: OF THI
I, WILLIAM WALKER of Saltburn-by-the-Sea in the County of York, Mining
Engineer do hereby declare the nature of this invention and in what manner
the same is to be performed to be particularly described and ascertained in and
by the following statement:
My invention has for its object the construction of a railway chair that, shali
hold the rail securely without the use of keys or wedges.
f
For this purpose I divide the chair in a diagonal direction into two parts, each
of which has a jaw formed to fit against the sides of the rail; flanges or lugs are
formed along the diagonal edge of each part, through which pass screw bolts by
which the two parts are secured together. In the. base-plate of each part are
formed two bolt holes; one of these is circular so as to receive a spike, coach-screw
or screw bolt by which it is secured to the sleeper, these holes being in the
diagonally opposite corners of the two parts. The other two bolt holes are slotted
so as to allow of the removal of the rail as will be presently described.
Fig. 1 of the accompanying drawing shews a plan of the above described con-
struction of railway chair, Fig. 2ashews an end elevation, Fig. 3 shews the two
parts of the chair separated so as to allow of the removal of the rail; Fig. 4 shews
a detached plan of one of the parts and Fig. 5 shews an elevation of the same.
The chair has two separate base plates A A¹ each of which has firstly a jaw B B¹,
with a flange or lug C C¹, a second flange or lug D D¹, an ordinary bolt hole E E¹
and a slotted bolt hole F F¹. The lugs C C and D D¹ have each a bolt hole for
the reception of screw bolts G G'. The bases A. A¹ have oblique or diagonally.
placed meeting edges along which run the lugs C C D D' having a corresponding
diagonal position.
The parts of the chair being placed in the position shewn at Fig. 1, with the
jaws B B¹ bearing against the web of the rail, while a space still intervenes between
the diagonal edges and lugs of the two parts, it will be seen that on introducing
the screw bolts, G G¹ through the lugs and tightening them up, they will tend to
make the two parts of the chair approach each other in a diagonal direction rela-
tively to the axis of the rail, and consequently the two jaws B B¹ will be made to
nip the rail firmly between them. When this. has been effected, ordinary spikes
or bolts are driven in the slotted holes F F¹ at the points shewn at Fig. 1, and
screws are driven in the holes E E¹, so that when it is desired to remove the rail
it is only necessary to remove the screws at E E', and the bolts G G¹, whereupon
the slotted holes F F¹ of the other bolts will allow the two parts of the chair to
be moved away from each other into the position at Fig. 3 so that the rail can be
raised from between the jaws.
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The meeting edges of the bases are formed stepped as shewn, so as to lock into
each other.and thus prevent any side movement of the parts when fixed together.
Owing to the very firm and secure hold on the rail afforded by this construction
of chair, it may be employed for holding the rails at the joints without the usual
fishplates.

page_text: Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim.is-
1. Constructing railway chairs divided in a diagonal direction into two parts,
each of which has firstly a jaw bearing against one side of the rail, and secondly
diagonally placed lugs through which pass bolts by means whereof the two parts
are drawn together in an oblique direction relatively to the axis of the rail, so
as to cause the jaws to nip the rail firmly between them substantially as herein
described.
2. In a railway chair, the combination of a divided base A A' with jaws B B',
lugs CC, D D¹, bolt holes E E¹ and slotted bolt holes F F¹, so arranged that when
the two parts of the chair are drawn together by means of bolts passing through
the lugs, the jaws B B¹ grip the rail firmly between them; while on the removal
of these bolts and of the bolts at E E¹, the slotted bolt holes F F¹ permit of the
two parts being separated sufficiently to allow of the removal or insertion of
the rail.