An Improvement in Locks for Railway and other Carriage Doors and other Analogous Purposes.
Year: 1888

page_text: Date of Application, 29th Oct., 1888
Complete Specification Left, 27th July. 1889-4ccepted, 23rd Nov., 1889
PROVISIONAL SPECIFICATION.
An Improvement in Locks for Railway and other Carriage Doors
and other Analogous Purposes.
We, SAMUEL WILKES and JONAH WILKES of Excelsior Works, 44 The Green
Bloxwich in the County of Stafford, Railway carriage lock manufacturers, do
hereby declare the nature of this invention to be as follows:-
Our invention consists chiefly in an improvement in William Wilkes's expired
patent No. 2117 of July 13th 1872, in so far as we dispense with the forged spring,
which, in order to hold it to its work, had to be secured in position by means of a pin
passed through it and the cap and cover of the lock, and rivetted thereto on either
side.
In lieu of this forged spring we claim as our only improvement the use of two
or more flat rolled steel springs bent together in a similar shape to the above,
or any other suitable shape, and lying one within the other.
The upper end of these springs nearest the fore-end of the lock press against
a lip on the top end of the left hand rim of the lock, whilst that part of the spring
which is bent abuts against a projection on the bottom of the said rim, and thus
held firmly in position.
By the use of these springs not only a greater amount of elasticity is obtained,
but an almost absolute immunity from danger to passengers by breakage and the
flying open of the doors, inasmuch as even should one of them break, there would
be one or more left to retain the bolt in position and prevent its working up by the
oscillation of the carriages.
These springs beside being particularly suitable and applicable to the expired patent
herein named, are also applicable to other descriptions of railway carriage locks and
locks for other similar purposes.
W. H. ST. AUBIN,
Agent for Applicants.
COMPLETE SPECIFICATION.
An Improvement in Locks for Railway and other Carriage Doors
and other Analogous Purposes.
We SAMUEL WILKES and JONAH WILKES of Excelsior Works 44 The Green
Bloxwich in the County of Stafford, Railway carriage lock manufacturers 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 :-
Our invention consists chiefly in an improvement in William Wilkes's expired
patent No. 2117 of July 13th 1872, in so far as we dispense with the forged spring,
which in order to hold it to its work, had to be secured in position by means of a pin
passed through it and the cap and cover of the lock, and rivetted thereto on either
side.
In lieu of these forged springs we claim as our improvement the use of two or
more flat rolled steel springs bent together in a similar shape to the above, or any
other suitable shape, and lying one within the other as shown in a Figs. 1 and 3.
The upper end of these springs nearest the fore-end of the Lock press against a lip
on the top-end of the left hand rim of the lock, B Figs. 1 & 3 while that part of the
spring which is bent abuts against a projection c Fig. 3 on the bottom of the said rim
and thus held firmly in position.

page_text: By the use of these springs not only a greater amount of elasticity is obtained, but
an almost absolute immunity from danger to passengers by breakage and the flying
open of the doors, inasmuch as even should one of them break, there would be one or
more left to retain the bolt in position-and prevent its working up by the oscillation
of the carriages.
These springs beside being particularly suitable and applicable to the expired
patent herein named, are also applicable to other descriptions of railway carriage
locks and locks for other similar purposes.
anu
shows springs in posSITION.
our said
Having now particularly described and ascertained the nature of
invention and in what manner the same is to be performed we declare that what
we claim is
1. The improved method of fixing springs in locks substantially as herein described
and illustrated by the accompanying drawings.
11
TI
1000
SAMUEL WILKES.
JONAH. WILKES.