An Improved Railway Chair.
Year: 1889

page_text: Date of Application, 11th Jan., 1889
Complete Specification Left, 9th Oct., 1889-Accepted, 9th Nov.,
1889
PROVISIONAL SPECIFICATION.
An Improved Railway Chair.
THOMAS ARMSTRONG Auburn Bank Navigation Road Altrincham Pattern Maker do
hereby declare the nature of this invention to be as follows:-
A Railway Chair which requires no wood key or wedge but which holds the rail
in position by means of a knuckle and iron key across the top of the jaw of the
5 chair; that part of the jaw coming in contact with the Rail being faced with lead.
Dated this 9th day of January 1889.
THOMAS ARMSTRONG.
COMPLETE SPECIFICATION.
An Improved Railway Chair.
I, THOMAS ARMSTRONG, of Auburn Bank, Navigation Road, Altrincham, in the
County of Chester, Pattern Maker, 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:—
The object of this invention is to provide a chair for holding or maintaining the
rails of railway tracks in position in which the usual key or wedge of wood is
dispensed with. It consists essentially in forming a chair with one jaw pivoted
or jointed so as to be rotated into position and held tightly against the rail by
means of a key or cotter inserted between it and a fixed or projecting part of the
chair.
It will be fully described with reference to the accompanying drawings
Fig. 1 is a side elevation in section of chair constructed according to my
invention.
Fig. 2, plan of same.
Fig. 3, end elevation.
Fig. 4, sectional elevation showing modified construction of chair.
I construct the chair with one rigid jaw A. against which one side of the rail B.
rests.
Instead of a second rigid jaw with a wedge of wood intervening between it
and the rail to hold or secure the rail in position a movable jaw C. rotating or
swivelling upon a bearing or projecting piece at the base of the chair secures the
rail in position and holds it tightly against the rigid jaw A. The base of the
movable jaw C. is formed with a knuckle joint upon which it turns when being
brought into, or thrown out of contact with the rail. Projecting from the base of
the chair is a lug or projecting piece E, formed with a slot or hole e near the upper
end to receive a key or cotter the movable jaw C, being formed with a central hole
through which the lug E, passes. The steel or iron key F, in the slot e forces the
movable jaw C. down, with its face against the rail as it rotates about the centre.
The movable jaw may be formed with projecting swivelling pieces c, engaging
with the lugs D, on the chair as in Fig. 1 or may be formed concave at the end
to engage with a projecting bearing piece D. on the chair as in Fig. 4.
If desired the movable jaw may be faced with wood lead or other material to present
a more yielding surface than iron to the side of the rail.
Instead of, or in addition to the projecting swivelling pieces c projecting beyond
the side of the movable jaw a knuckle joint may be formed directly between the
base of the movable jaw and an additional projection on the base of the chair
between the lugs D. And also instead of the lug E, projecting through the movable
aw C, two such lugs may be employed one at either side of the movable jaw through
which the key or cotter to secure it would pass.

page_text: Having now particularly described and ascertained the nature of the said
invention and in what manner the. same is to be performed, I declare that what
I,claim is
1. A railway chair having a rigid jaw against which the rail rests and a movable
jaw moving about a centre-which abutts against the other side of the rail and
is held in position by a key or cotter acting in a direction to cause it to rotate
on its axis substantially as described.
2. In a railway chair, the combination with a rigid jaw at one side, of a movable
jaw working on a knuckle joint at the other, the lug or projection E, and the key F,
by which the face of the movable jaw is forced down against the rail and held in
position substantially as described.
3. A railway chair having the several parts constructed and arranged substantially
as herein described.
Dated this 5th day of October 1889.
WM. P. THOMPSON & Co.,
6, Bank Street, Manchester, Patent Agents.