Improvements in Railway Carriage Door and other similar Looks.
Year: 1895

page_text: Date of Application, 18th May, 1895-Accepted, 22nd June, 1895
COMPLETE SPECIFICATION.
of
Improvements in Railway Carriage Door and other similar Looks.
We, ALFRED DAVY, of 30 Havelock Square, Sheffield, in the County of York,
and FELIX JONES, and JOHN SLATER FOSTER, both the latter of us
39 Bloomsbury Street, Birmingham, in the County of Warwick, and both Railway
Carriage Lamp and Furniture Manufacturers, and trading jointly in the name of
Jones & Foster do hereby declare the nature of our said invention and in what
manuer the same is to be performed to be particularly described and ascertained
in and by the following statement :-
Our invention has for its object improvements in railway carriage door and
other similar locks which are of much simpler construction than those now in
use and they offer very special facilities for repairs without removing the carriage
from its work for the purpose besides being much less likely to become deranged
and they can be made generally at a reduced cost.
In order that our invention may be clearly understood and more easily carried
into practical effect we have appended hereunto a double sized sheet of drawings
upon which we have fully illustrated one of our locks as suitable for application to
an ordinary railway carriage door and from which the principle may be applied to
other analogous positions and conditions.
Figure 1, is a front view of the lock with its back plate removed so as to show
the internal mechanism in its normal condition.
Figure 2, is a view looking at the front edge thereof with the mechanism in the
same position as in Figure 1.
Figure 3, is a similar view to Figure 1 but with the internal mechanism in its
position as is the case when the handle is turned horizontally or at right angles to
the edge of the door.
Figure 4, is an edge view similar to Figure 2 but with the internal mechanism
as shown in Figure 3.
Figure 5, is a full sized view of the spring S, aud
Figure 6, is a side view of the said spring.
The drawings show the lock A opened out in both the front views, Figures 1
and 3, the back plate being removed for the purpose as will be clearly understood.
It is composed essentially of only two working parts viz.,-the tumbler or bolt B
and the spring S and is thus most simple. The hook bolt B is hung upon the
circular pivot pieces which fit into holes in both the back and front as usual.
In Figures 1 and 2 the bolt B is in its normal position with the projecting part b³
and rounded nose b³ as is usual in "slam" locks. In our lock it will be noticed
from that we have a supplemental hole a opposite or thereabouts to the bolt spring S
which is fitted in such a position and of such a shape that it can be either put into
the lock or taken out therefrom through the hole as with any ordinary tool in a few
seconds without removing the lock from its position or disconnecting with the
handle from the lock which is a very great advantage as a railway carriage is
now rendered almost useless if one lock goes wrong. The formation of the spring
is shown by Figures 5 and 6 and its action upon the bolt in its several positions is
so clearly shown by the drawings that no detailed explanation is further required,
further than to remark that we prefer to hollow the back of the spring S a little
at s' and to make the end a little sharp with a corresponding recess inside the
flange a¹ to receive it which tends to prevent it jumping out of position if there was
any liability of such. Of course various modifications of the general configuration

page_text: or configuration of parts may be effected without departing from the principle.
The lock may be made of any suitable material but is generally of brass. Of
course the lock may be constructed and used without the renewal hole a³ with the
same working effect except in case of repairs.
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 :-
1st. The improvements in railway carriage door and other similar locks with an
internal foundation of parts suitable to receive a such like spring as S through
any suitable opening a substantially as and for the purpose herein set forth and as
shown upon the drawings.
2nd. The lock for the purpose hereinbefore named composed essentially of the
two parts B and S either with or without the hole a³ for renewal.
Dated this 17th day of Mo 1903
GEORGE BARKER,
77 Colmore Row, Birmingham, Agent for Applicants.
GEORGE BARKER,
77 Colmore Row, Birmingham, Agent for Applicants.