Improvements in Locks or Fastenings for Railway-carriage and other Doors.
Year: 1890

page_text: Date of Application, 29th Jan., 1890
Complete Specification Left, 22nd Oct., 1890-Accepted, 22nd Nov., 1890
PROVISIONAL SPECIFICATION.
Improvements in Locks or Fastenings for Railway-carriage and
other Doors.
We, CHARLES JAMES REYNOLDS of Downs Park Road, Clapton and HENRY
PARKIN of Albert Terrace, Bow, both in the County of Middlesex, Engineers do
hereby declare the nature of this invention to be as follows:-
Our invention relates to improvements in locks or fastenings for railway carriage
and other doors, and is specially applicable to our patent lock or fastenings No. 2336
of 1883, as well as to other locks or fastenings.
In the case of locks the bolts of which are impelled by a coiled or spiral spring
acting in compression, which springs may, or may not, as desired, be placed over a
tail or projecting pin attached to the bolt, and passing through the opposite end of
the lock case, or conversely, such pin surrounded by the spring may be attached to
the lock case, its end passing into an aperture in the bolt. It has been found that
if the spring becomes broken, although its action is somewhat impaired, it is not
entirely useless unless further weakened by the broken pieces separating and falling
away from their position behind the bolt, whereby the spring being shortened becomes
unserviceable, and consequently the bolt will not act. The present invention is
designed to prevent the falling out of any broken portions of the spring, in the
following manner.
In addition to the central tail or pin, if any, which may, or may not, be within the
spring, we support or enclose the spring by one or more small metal shelves or guards,
placed on one or both of its open sides which are not closely confined by the lock
case, thus preventing the falling out of the broken pieces of the spring, if any, and at
the same time allowing sufficient space for its proper action.
It is to be understood that the shelves or guards placed outside the spring may
either be attached to the bolt, and pass through the opposite end of the lock
case; or conversely, they may be attached to the lock case and pass through
the bolt.
Our invention applies also to locks having two or more springs acting together, in
which case each spring is protected by guards as before described, and in the case of
the springs being placed side by side or one above the other, it is obvious that the
strip or guard between any two of the springs will serve for both.
The guards, in any case, may if preferred be applied to the springs only and the
central pin dispensed with, in which case as before described, they will prevent
any broken portions of the spring or springs from being detached and falling
away.
Dated this 20th day of January 1890
S. S. BROMHEAD,
97, Newgate Street, London, E.U., Patent Agent.
COMPLETE SPECIFICATION.
Improvements in Locks or Fastenings for Railway-carriage and
other Doors.
We, CHARLES JAMES REYNOLDS of Downs Park Road, Clapton, and HENRY
PARKIN of Albert Terrace, Bow, both in the County of Middlesex, Engineers, 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 relates to improvements in locks or fastenings for railway carriage
and other doors, and is specially applicable to our patent lock or fastenings No. 2336

page_text: of 1883; as well as to other locks or fastenings in which coiled springs are
employed.
In the case of locks the bolts of which are impelled by a coiled or spiral spring
acting in compression, which springs may, or may not, as desired, be placed over a
tail or projecting pin attached to the bolt and passing through the opposite end of the
lock case, or conversely, such pin surrounded by the spring may be attached to the
lock case, its end passing into an aperture in the bolt. It has been found that if the
spring becomes broken although its action is somewhat impaired, it is not entirely
useless unless further weakened by the broken pieces separating and falling away from
their position behind the bolt, whereby the spring being shortened become unservice-
able, and consequently the bolt will not act.
The present invention is designed to prevent the falling out of any broken portions
of the spring in the following manner.
We will now describe the invention with reference to the accompanying drawings
in which
Fig. 1 shews a lock with a single spring and
Fig. 2 a similar lock with 2 springs.
a, is the lock case. b, is the bolt. c, is the tail of the bolt. d, is the spring. e, is
the shelf or guard. y, is a friction bar at back of bolt.
It will be seen that in addition to the central tail or pin e, which may, or may not,
be within the spring d, we support or enclose the spring by one or more small metal
strips e, forming shelves or guards placed on one or both of its open sides, that is the
sides which are not closely confined by the lock case a. We thus prevent the falling
out of the broken pieces of the spring in case of fracture and at the same time allow
sufficient space for the springs proper action.
It is to be understood that the shelves or guards e, placed outside of the spring d,
may either be attached to the bar g, or bolt b, and pass through the opposite end of
the lock case; or conversely, they may be attached to the lock case and pass through
the bolt.
Our invention applies also to locks having two or more coiled springs d, acting
together as shewn in Fig. 2 in which case each spring is protected by guards e, as
before described, and in the case of the springs d, being placed side by side or one
above the other it is obvious that the springs being sufficiently close together the strip
or guard e, between any two of the springs will serve for both.
The guards e, in any case, may if preferred be applied to the springs only and the
central pin or tail c, be dispensed with, in which case as before described, they will
prevent any broken portion of the spring or springs from being detached and falling
away.
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
In a lock or fastening containing coiled springs, the combination with such springs
of the guards e, as herein described and set forth."
Dated this 22nd day of October 1890.
ctober
S. S. BROMHEAD,
97, Newgate Street, London, E.C., Patent Agent.