Year: 1885

page_text: 1 WILLIAM HENRY LINDSAY of 14 South Wharf Paddington Basiu in the
County of Middlesex Engineer do hereby declare the nature of this invention to
be as follows :===
According to this invention I form a railway chair from rolled iron or steel
preferably from rolled steel in the manner following:-I first roll á continuous bar
or plate of steel flat on its underside and with two longitudinal fins or flanges
standing up from its upper side at a distance apart from one another the plate
extending on either side beyond these flanges.
I then cut the bar transversely into short lengths equal to the width of the chair
to be formed.
I then take the lengths one by one and place between the two flanges above
mentioned a block the cross section of which corresponds with the form to which
the interior of the chair is to be made-I then cause two dies to be forced by
powerful hydraulic presses against the outer sides of the flanges of the plate so as
to force the upper parts of the flanges inwards and mould their inner surfaces to
the contour of the block which is between thein.
Afterwards holes for bolding down treñails are formed, through the portions of
the plate which extend outwards beyond the flanges.

page_text: Improvements 'in Railway Chairs and in their Manufacture.
I, WILLIAM HENRY LINDSAY of 14 South Wharf Paddington Basin in the
County of Middlesex 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 :—
To form a railway chair I first roll a continuous bar or plate of steel or it might
be of iron flat on its underside and with two longitudinal fins or flanges standing
up from its upper side at a distance apart from one another and with the plate
extending on either side beyond these flanges. The bar I cut transversely into
lengths equal to the width of chair to be formed and then squeeze each length
(after it has been heated) between dies to bring it to the form of chair required.
In order to form a chair in the above way of sufficient strength to prevent its
bending or springing when in use I make the central portion of the plate or bar
which is between the two flanges thicker than the portions of the plate which are
outside these flanges as shown at Figure 1 of the drawings hereunto annexed
which is a cross section of a bar of the form I use.
I also make one side of the central portion A of the bar which is between the
flanges B thicker than the other side so that when a length of the bar has been
formed into a chair any rail placed into the chair will "cant' over slightly to one
side as they are usually required to do.
"
To cut the plate or bar into lengths of the size required I support the flanged
side of the bar or plate upon a bed of the same contour, leaving the end portion of
the bar which is to be cut off projecting beyond the edge of the bed I then cause
a semicircular or curved shear blade to move past the end of the bed and to sheer
off the overhanging end of the bar and in doing so, the centre of the edge of the
curved shear blade is made to come first against the centre of the flat side of
the bar.
Each length of the bar so cut off is then heated and pressed between dies to
bring its flanges to the shape required for them to form the chair jaws.
This I effect in the manner shown at Figure 2 each length cut off from the bar
after being heated is placed on to a table C and a block D the cross section of
which corresponds with the form to which the interior of the chair is to be shaped
is placed between its two flanges B One end of the heated length of bar is then
moved up to a fixed die E and à moveable die F is moved forwards against the
other end of the length of bar by a hydraulic or other powerful press until the
parts have been brought into the position shown and the flanges thereby moulded
to the form required.
Afterwards holes are punched through the ends of the foot of the chair for the
spikes or trenails used for securing the chair to a sleeper to be passed through.
When wooden trenails are to be used I make the holes through the foot of the
chair larger than required for the trenails and I place into each hole a bushing G
of greater depth than the foot of the chair.
The holes are punched through the foot of the chair whilst the chair is still hot
and the bushings G in a cold state are dropped into the holes so that as the chair
cools and contracts the bushings are gripped and held securely in the holes.
•

page_text: By bushing the holes in this way greater bearing surface is given between the
chair and the trenails.
Figure 3 shows a cross section and Figure 4 a plan view of a railway chair
formed in the above way.
Figure 5 shows a cross section and Figure 6 a plan partly in section of the same
chair with a rail secured in it.
The rail is shewn to be secured in the chair by means of a spring metal key
bearing against the rail and against a metal block interposed between itself and
one of the chair jaws as described in the specification lodged by me with an
application for Patent N° 5066 in the year 1885-the inner face of the block
being formed with ratchet like teeth for the key to engage with to prevent the
key from working loose.
Although I have only shewn in the drawings this one form of chair I would
have it understood that I do not confine myself to the making of chairs of this
form in the manner herein before described as chairs of other and ordinary forms
may be produced in the same way.
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. Forming railway chairs from lengths cut off from a bar rolled flat on its
under side and with two longitudinal flanges on the upper side and with the
central portion of the bar which is between the flanges thicker than the
extremities of the length of bar which are outside the flanges substantially as
described.
2.-Cutting the bar into lengths by shearing apparatus formed substantially in
the manner described.
3. Pressing each length of the bar when heated in apparatus formed sub-
stantially in the manner herein before described with reference to Figure 2 of
the drawing such apparatus consisting of a table on which the heated length of
bar is to rest, a block to be placed between the flanges of the length of bar-a fixed
die for one end of the length of bar to rest against and a moveable die to be moved
against the other end of the length.
4-Bushing the holes in the ends of the chairs with metallic bushings sub-
stantially as described.
5.-A railway chair formed of rolled steel with the foot of the chair thicker at
its central portion which is between the two jaws than at its ends which are
outside the jaws substantially as described.
6. A railway chair formed of rolled steel with the foot of the chair thicker at
its central portion which is between the two jaws than at its ends which are
outside the jaws and with the holes which are formed through its ends bushed
with a metallic bushing.