Improved Means for Securing the Keys in Railway Chairs.
Year: 1893

page_text: Date of Application, 28th Oct., 1893
Complete Specification Left, 30th July, 1894-Accepted, 1st Sept., 1894
PROVISIONAL SPECIFICATION.
Improved Means for Securing the Keys in Railway Chairs.
I STEPHEN PETTIT of 13 Knights Park, Kingston-on-Thames in the County of
Surrey, Gentleman, do hereby declare the nature of this invention to be as
follows:-
1
The object of this invention is to dispense with the wedges at present employed
for securing the keys in railway chairs and to provide better means for effecting
this.
According to this invention I fix longitudinally to the key a strip of metal (hoop
iron for example) the said strip being of such a length and so fixed that when the
key has been driven in the chair the ends of such strip can be turned over against
each side of the jaw of chair and thus secure the said key firmly.
By securing keys as above they will not be liable to get loose as is the case with
the wedges now employed which continually require tightening.
•
1009
BROWNE & Co.,
9, Warwick Court, W.C., Agents for Applicant.
COMPLETE SPECIFICATION.
Improved Means for Securing the Keys in Railway Chairs.
I STEPHEN PETTIT of 13 Knights Park Kingston-on-Thames in the County of
Surrey, Gentleman 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 dispense with the wedges at present employed
for securing the keys in railway chairs and to provide better means for effecting
this.
According to this invention I fix longitudinally to the key a strip of metal (hoop-
iron for example) the said strip being of such a length and so fixed that when the
key has been driven in the chairs the ends of such strip can be turned over against
each side of the jaw of chair and thus secure the said key firmly. By thus securing
keys they will not be liable to get loose as is the case with the wedges now employed
which continually require tightening.
And in order that my said invention may be more fully understood I will now
proceed to describe the same with reference to the accompanying sheet of drawings
in which
Fig. 1 shews an elevation of a chair and rail with key fitted according to my
said invention; Fig. 2. plan of same;
Fig. 3. is a detached view of key with my improvement adapted thereto.
The same letters denote the same parts in all the views.
a shews the rail, 6 key, c flat strip of metal, d chair.
The key b has a strip of metal c secured to it as shewn clearly at Fig. 3.
When the key b is driven between the rail a and jaw of chair d the ends of the
metal strips c are turned over against the jaw of chair d so as to keep said key in
position as shewn at Figs. 1 and 2.

page_text: By this invention the key b will not be liable to shift and the rail will thus
always be kept tight in the chair, without having to be continually attended to,
which is not the case when the ordinary wedges are used, as these constantly
get loose.
Instead of flat strips c I might have a wire or wires to effect the same object.
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 :-
•
By this invention the key b will not be liable to shift and the rail will thus
always be kept tight in the chair, without having to be continually attended to,
which is not the case when the ordinary wedges are used, as these constantly
get loose.
Instead of flat strips c I might have a wire or wires to effect the same object.
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 key having a strip of metal, wire or wires fixed thereto for the purpose
set forth.
2. The improved means for securing the keys in railway chairs substantially as
set forth.
Tandhi anh T.1 1904
BROWNE & Co.,
9, Warwick Court, Gray's Inn London, W.C., Agents for the Applicant.