Improvements in and relating to Railway Chairs.
Year: 1894

page_text: Date of Application, 20th July. 1894
Complete Specification Left, 19th Apr., 1895-Accepted, 24th May, 1895
:
PROVISIONAL SPECIFICATION. ·
Improvements in and relating to Railway Chairs.
I, CHARLES CHENU, of Etampes (Seine et Oise) in; the Republic of France,
Merchant, do hereby declare the nature of this invention to be as follows :-
This invention relates to railway chairs and has for object to provide a chair
by means of which the fixing and locking of the rail is effected automatically and
without it being necessary to employ a wedge.
According to my invention the improved chair is provided with two cheeks each
formed in two parts cast integral with the base of the chair and adapted to receive
two jaws or grippers the lower parts of which are curved and upon which the
bottom flange of the rail rests; the curved parts of the jaws work in recesses or
cavities formed in the base of the said cheeks. The jaws are provided with
lateral projections at a certain above the cheeks in order that conical keys may if
so desired be inserted between the said projections and caused to engage with
grooves or openings formed in the cheeks.
In some cases a chair having a single pivotting jaw only is employed in which
case the chair is constructed of an outer cheek against which the rail rests and an
internal cheek formed in two parts to receive the jaw which works or pivots in
recesses formed in the base of the parts of this internal cheek and supports the
rail at one part and at another presses against the web of the rail and holds it
firmly against the outer cheek.
Dated the 20th day of July 1894.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in and relating to Railway Chairs.
I, CHARLES CHENU, of Etampes (Seine et Oise) in the Republic of France,
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 relates to railway chairs and has for object to provide a chair
by means of which the fixing and locking of the rail is effected automatically and
without it being necessary to employ a wedge.
According to my invention the improved chair is provided with two cheeks each
formed in two parts cast integral with the base of the chair and adapted to receive
two jaws or grippers, the lower parts of which are curved and upon which the
bottom flauge of the rail rests; the curved parts of the jaws work in recesses or
cavities formed in the base of the said cheeks. The jaws are provided with lateral
projections at a certain distance above the cheeks in order that conical keys may
if so desired be inserted between the said. projections and cheeks in grooves formed
in the same.
•

page_text: •
In some cases a chair having a single pivotting jaw only is employed in which
case the chair is constructed of an outer cheek against which the rail rests and an
internal cheek formed in two parts to receive the jaw which works or pivots in
recessess formed in the base of the parts of this internal cheek and supports the
rail at one part and at another presses against the web of the rail and holds it
firmly against the outer cheek.
To enable my invention to be fully understood I will describe the same by
reference to the accompanying drawing, in which :-
Figure 1 is a side elevation of my improved chair shewing the rail in position:
Figure 2 is a side elevation of the chair with the jaws removed:
Figure 3 is a plan of Figure 1:
Figure 4 is an end view of my improved chair:
Figure 5 is a side view; and,
Figure 6 an end view of one of the jaws :
Figure 7 shews a modification of my improved chair.
a is the foot or base of the chair, and b, 5' and c, c¹ the two parts respectively of
the two cheeks which are cast whole with the foot a. The bottom d of the chair
between the two cheeks is inclined at about 20° to the horizontal.
e, fare the recesses or cavities formed in the base of the cheeks b, b¹ and c, c¹
respectively in which the curved parts g³ and h³ of the jaws work. The jaws g, g'
and h, are placed between the two parts of the cheeks b, b¹ and
respectively.
C,
c'
The base or foot a of the chair is secured to the sleeper by ordinary means such
as, for instance, by three screws k, l, m.
c¹
The jaws are formed of special form, the parts g³ and h³ being formed to the
are of a circle and fitting accurately in the cavities e, f of the cheeks b, b¹ and G
so that the jaws can work in the said cavities, that is to say, they can open or
close upon and grip the rail at their upper ends g, h whilst their lower ends g¹, h¹
form a support n for the foot of the rail.
When the jaws are opened the rail can be inserted or removed with ease.
When the rail is introduced its weight, aided if necessary by a light additional
weight, will cause the jaws to close upon the web and foot of the rail and to grip
the same with a force which increases with the load on the rail.
To prevent any movement of the rail which might take place when there is no
load on the same, I provide the jaws g, gl and h, with lateral projections p and p'
respectively, adapted to come over the parts b' and c of the cheeks. Two conical
keys g and q are inserted in grooves formed in the parts p and 6' and the parts pl
and c respectively, and these keys when in position prevent the jaws from
opening.
In the modification shewn in Figure 7 only one jaw h, h' is used. In this case
the cheek b, which is on the outside of the line, grips the rail in conjunction with
the jaw h, h which supports the foot of the rail in the manner hereinbefore
described.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is:-
1. An automatically locking chair for railways having two cheeks, each of
which is formed of two parts integral with the base or foot of the chair, the
cheeks being adapted to receive two jaws which work in recesses or cavities in the
lower ends of the said cheeks and which support the foot or lower flange of
the rail on their lower extremities and grip the web of the rail with their upper
extremities, the said jaws having sufficient movement to allow of the insertion
and removal of the rail, substantially as described.
2. An automatically locking chair of the kind described in Claim having on
the outside a cheek against which the rail bears and on the inside a cheek in two
parts adapted to receive a jaw which works in cavities in the base of these

page_text: parts and which supports the rail at one end and grips the web of the rail at the
other end in conjunction with the outer cheek, substantially as described.
3. The manufacture and use of the improved railway chair hereinbefore
described and illustrated in the accompanying drawing.
Dated this 19th day of April 1895.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.