Improvements in Keys applicable for Holding or Fastening Railway- rails within their Chairs.
Year: 1890

page_text: Date of Application, 4th Feb., 1890
Complete Specification Left, 3rd Nov., 1890-Accepted, 6th Dec, 1890
PROVISIONAL SPECIFICATION.
Improvements in Keys applicable for Holding or Fastening Railway-
rails within their Chairs.
I, RICHARD TOWLER WILKINSON of New Brighton House, Gargrave vid. Leeds in
the County of York, Timber Merchant, do hereby declare the nature of this invention
to be as follows, that is to say :-
It relates to improvements in the formation and construction of keys applicable for
holding or fastening the rails of railways within their chairs whereby same are
rendered more efficient and less liable to become disarranged than are those as hereto-
fore constructed.
This I attain by forming the keys somewhat of duplex-wedge shape, the inclined
portion or surface of one of these parts to be in contact with that of the other, a
suitable opening being made lengthwise about centrally through each part so that a
bolt may pass through them to bind the two together. The arrangement of this bolt
by one of its ends (say the head) laying hold of one part of the key while the other
(say the nut) lays hold of the other part, is such as to enable it to cause one of the
parts to move up the inclined part of the other and so increase its dimensions
laterally, when its nut is tightened or screwed up on its screw part by which means
when said key is in position within its chair the holding or releasing of that part of the
rail in contact with it may be regulated by the tightening or slackening of the nut
on the bolt above described, as may be desired.
The part of the key that is in contact with the chair has lugs formed on it for
spanning or clamping said chair by which means it is held in position.
Where the key comes in contact with the rail it is preferably formed of wood; the
other parts being formed of metal, however it will readily be seen that it may be
constructed entirely of wood or entirely of metal as may be desired.
.Instead of the key being formed simply of a duplex-wedge shape as above described
it may be formed of three or more parts without departing from the nature of this
invention, provided that the necessary inclined portion is employed for increasing or
decreasing its dimensions laterally as the parts are moved to operate upon each other
by the 'bolt.
Dated this 3rd day of February 1890.
RICHD. T. WILKINSON.
Per Samuel Hey,
Agent.
COMPLETE SPECIFICATION:
Improvements in Keys applicable for Holding or Fastening Railway-
rails within their Chairs.
I RICHARD TOWLER WILKINSON of New Brighton House, Gargrave viú Leeds in
the County of York, Timber 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, that is to say :-
It relates to improvements in the formation and construction of keys applicable for
holding or fastening the rails of railways within their chairs whereby same are
rendered more efficient and less liable to become disarranged than are those as hereto-
fore constructed.
In the following description reference is made by figures and letters to the
accompanying drawings which form part of this Specification.

page_text: Figs. 1, 2 and 3 are side, end and top. views respectively of portions of a rail and
sleeper and a chair with the improved key applied thereto.
Figs. 4, 5, 6 and 7 are respectively side, end sectional and top views in detail of the
improved chair.
I attain the object of my invention by forming the key a somewhat of duplex-
wedge shape the inclined surface of one of these parts a to be in contact with
that of the other a², a suitable opening being made lengthwise about centrally
through each part a', a², so that a bolt b may pass through them to bind the two
together.
The arrangement of this bolt 6' by one of its ends (say the head 6') laying hold of
the part a while the other (say the nut c) lays hold of the other a², is such as
to enable it to cause one of the parts a¹ a² to move up the inclined part of the
other and so increase its dimensions laterally, when its nut c is tightened or
.screwed upon its screw part, by which means when said key a is in position
within its chair holding or releasing of that part of the rail of that is in contact
with it may be regulated by the tightening or slackening of the nut c on the
bolt 6 as may be desired.
12
'
The additional nut c¹ is as a locknut for the nut c.
The part of the key a has lugs a³ a formed on it for spanning or clamping
said chair .d, by which ineans it is held in position and where the key a comes
in contact with the chair d it is preferably formed of wood or if the part a¹ is
of metal then a piece of wood g is inserted for contact with the metal chair d,
however it will readily be seen that the key a may be constructed entirely of wood or
entirely of metal as may be desired.
Instead of the key a being formed simply of a duplex-wedge as above described
it may be formed in three or more parts without departing from the nature of
this invention, provided that the necessary inclined portion is employed for
increasing or decreasing its dimensions laterally as the parts are moved to operate
upon each other by the bolt b.
"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. The formation of keys for holding the rails of railways in position, said formation
being of such a description that the lateral dimensions of said keys may be increased
or diminished by operating the nut of a bolt substantially as specified.
2. The parts a¹ and a², the bolt band the wood g, in combination, the same being
formed and arranged to attain the object specified substantially as herein set forth.
Dated this 1st day of November 1890.
R. T. WILKINSON.
Per Samuel Hey,
Agent.