An Improved Method of Securing Rail Chairs to Metal Sleepers.
Year: 1894

page_text: Date of Application, 27th Nov., 1504
Complete Specification Left, 27th Aug., 1895-Accepted, 28th Sept., 1895
PROVISIONAL SPECIFICATION.
An Improved Method of Securing Rail Chairs to Metal Sleepers.
We, JOHN JAMES HAYMAN, of 4, Holland Road, Teignmouth, Stone-mason,
HENRY WILLIAM PEARSON, of 11, Alexandra Road, Clifton, Bristol, Civil
Engineer, and HENRY KATER CRIPPS, of "Redcliffe," Clifton Down Road,
Clifton, Bristol, Marble Merchant, do hereby declare the nature of this invention
to be as follows:-
This invention, which relates to railway permanent way in which metal sleepers
are employed, consists in an improved method of securing the chairs to the said
sleepers.
According to this invention, each sleeper is formed with two parallel edges
extending along the top of the sleeper throughout the whole length of the sleeper,
or throughout a part thereof.
Between the ledges intervenes a channel into which is received, when the chair is
in position, a rib extending downwards from the underside of the chair. At or
about midway between the ends of the chair the rib has a gap across which extends
a fillet projecting downwards from the underside of the chair. At one side the
chair is furnished with claws which engage with one of the ledges aforesaid of the
sleeper. At the opposite side the chair is hollowed out to receive a specially
designed clip by which the connection of the chair to the sleeper is made secure.
To insert the clip, the chair is tilted back on the claws to an extent which enables
the back top edge of the clip to pass clear of the fillet into a recess at the back
thereof; the lower edge of a lip formed on the outer face of the clip being, at the
same time, clear of the outer edge of the ledge on the sleeper opposite to that with
which, as aforesaid, the claws of the chair engage. By lowering the chair on the
clip the latter is moved eccentrically and by virtue of such movement the lip
aforesaid of the clip is forced into full engagement with the ledge, between the
underside of which and the recess at the back of the fillet the clip becomes locked.
The locking effect is enhanced by the application of weight to the rail in the chair.
Accordingly, a passing train tends to render the connection between the chair and
the sleeper more secure.
The chair is steadied in true position and maintained in gauge by the rib
aforesaid and by studs provided in the underside of the chair and taking into
ockets in the upper faces of the ledges of the sleeper.
The clip is freed and the chair released by an upward pressure exerted below a
idge formed on the outer face of the clip which is thus tilted and so caused to turn
back on the fillet until the lip aforesaid clears the ledge with which the clip when
closed engages.
Dated this 26th day of November 1894,
NICHOLAS WATTS,
Bristol, Chartered Patent Agent.

page_text: An Improved Method of Securing Rail Chairs to Metal Sleepers.
"
We, JOHN JAMES HAYMAN, of 4, Holland Road, Teignmouth, Stone-mason,
HENRY WILLIAM PEARSON, of 11, Alexandra Road, Clifton, Bristol, Civil
Engineer, and HENRY KATER CRIPPS, of "Redcliffe,' Clifton Down Road,
Clifton, Bristol, Marble Merchant, 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 :-
This invention, which relates to railway permanent way in which metal sleepers
are employed, consists in an improved method of securing the chairs to the said
sleepers.
According to this invention, each sleeper is formed with two parallel ledges
extending along the top of the sleeper throughout the whole length of the sleeper,
or throughout a part thereof.
Between the ledges intervenes a channel into which is received, when the chair
is in position, a rib extending downwards from the underside of the chair. At or
about midway between the ends of the chair the rib has a gap across which
extends a fillet projecting downwards from the underside of the chair. At one side
the chair is furnished with claws which engage with one of the ledges aforesaid of
the sleeper. At the opposite side the chair is hollowed out to receive a specially
designed clip by which the connection of the chair to the sleeper is made secure.
To insert the clip, the chair is tilted back on the claws to an extent which enables
the back top edge of the clip to pass clear of the fillet into a recess at the back
thereof; the lower edge of a lip formed on the outer face of the clip being, at the
same time, clear of the outer edge of the ledge on the sleeper opposite to that with
which, as aforesaid, the claws of the chair engage. By lowering the chair on the
clip the latter is moved eccentrically, and, by virtue of such movement, the lip
aforesaid of the chip is forced into full engagement with the ledge, between the
underside of which and the recess at the back of the fillet the clip becomes locked.
The clip is freed and the chair released by an upward pressure exerted below a
ridge formed on the outer face of the clip which is thus tilted and so caused to turn
back on the fillet until the lip aforesaid clears the ledge with which the clip when
closed engages.
Referring to the accompanying drawings,
Fig. 1 thereof represents in side elevation a metallic transom sleeper a with a
rail chair b secured thereon in accordance with this invention.
Fig. 2 is a vertical section at or about midway in the chair; and
Fig. 3 is an end view as seen from between the rails; the sleeper a being in
section.
Fig. 4 represents a plan.
The sleeper a is formed with two parallel ledges a¹ a extending along the
sleeper throughout the whole or a part of its length. Between the ledges a' and a
intervenes a channel c into which is received, when the chair b is in position, a
rib extending downwards from the underside of the chair_b. At or about
midway between the ends of the chair b is a gap corresponding in width with that
of the clip d. Across the gap extends a fillet e projecting downwards from the
underside of the chair b.
At the side opposite to the clip d the chair b has claws 6 which engage with the
ledge a'. The clip d is inserted by first tilting the chair b to the position shown in
dotted lines at Fig. 2. This enables the back top edge d' of the clip to pass
inwards clear of the fillet e into the recess at the back of the fillet; the lower edge
of the lip d² formed on the outer face of the clip being, at the same time, clear of
the outer edge of the ledge a².

page_text: By lowering the chair on the clip d, the latter is moved eccentrically inwards
and upwards pivotting or sliding on the top of the ledge a' until it becomes locked
between the underside of the said ledge and the recess at the back of the fillet e.
The locking effect is increased by the application of weight to the rail in the
chair.
Accordingly, a train renders the connection between the chair and the sleeper
more secure.
The chair 6 is steadied in true position and maintained in gauge by the rib b¹ by
studs formed on or fitted into the underside of the chair and taking into sockets
provided in the upper faces of the ledges a¹ and a² of the sleeper a.
The clip d is freed and the chair unlocked by an upward pressure applied
below the ridge d³ of the clip d. By this means the chair b is raised on the
claws 62 and the clip is tilted and so caused to turn back on the fillet e until the
lip d' clears the ledge a², when the clip is free to be withdrawn.
The pattern of sleeper may vary. Any suitable form may be adopted which is
fitted or shaped to take the locking clip d and permit it to act on the chair and
sleeper as hereinabove described.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is :-
An improved method of and means for securing rail chairs to metallic sleepers,
that is to say, by means of a removable clip such as d shaped to engage with and
become locked between a fillet such as e, formed on or otherwise provided in the
base of the sleeper, and a ledge such as a² of the sleeper; the latter being furnished
with claws such as 63 serving as hinges whereon to tilt the chair for locking and
unlocking, and a rib such as b¹, or its equivalent, filling a groove, channel or recess
in the sleeper; the arrangement being such that the application of downward
pressure on the rail increases the locking effect between the chair and the sleeper,
substantially as hereinbefore described with reference to the accompanying
drawings.
Dated this 22nd day of August 1895.
NICHOLAS WATTS,
Bristol, Chartered Patent Agent.