Improvements in Means or Apparatus for Looking up Railway Carriage Doors.
Year: 1891

page_text: Date of Application, 17th July, 1891
Complete Specification Left, 19th Sept., 1891-Accepted, 24th Oct.,
1891
PROVISIONAL SPECIFICATION.
Improvements in Means or Apparatus for Looking up Railway
Carriage Doors.
I, EDWARD GARNETT of 17 Barkworth Road, Rotherhithe New Road, London,
S.E. Engineer's Fitter, do hereby declare the nature of this invention to be as
follows:-
My invention relates to improvements in means or apparatus for locking up
railway carriage doors and has for its object to prevent the number of accidents
occurring constantly to passengers who are foolhardy enough to alight from their
compartments before the train has come to a stand-still, or attempt to enter a
railway compartment whilst the train is in motion.
The apparatus which I have devised is to be operated by the guard in his van,
it can however also be worked in case of need by the engine driver, and is actuated
from the vacuum brake of the train, the connection therewith being effected in any
suitable manner. Provision is also made in the case of the locking apparatus
being actuated, while one or more of the carriage doors are opened, these doors
being accordingly capable of being shut in the ordinary way although they cannot
be subsequently opened by the passengers. In case of a severance occurring in the
train, the doors are automatically unlocked.
In carrying my invention into practice I fix in any suitable manner to the lower
part of a carriage frame and close to each door a guide plate within which can slide
to and fro a casing containing a bolt upon the inner end of which is coiled a spring
while its outer end terminates with a latch cut slantly outwards and projecting out
of the said casing. One end of the spring bears upon the end of the casing, and
the other against the inner flange of the latch. The end of the casing which is
furthest from the door terminates with a perforated head connected to the corre
sponding end of the lever, whereby the apparatus is actuated with the aid of the
vacuum brake by the guard. A rod or chain is attached to the inner end of
the bolt, which protrudes when pulled thereby, through an opening formed in the
casing, this rod or chain leads to the engine within the driver's reach or to the
guard in the guards van.
At the lower part of the carriage doors are fixed suitable recesses provided with
striking plates placed opposite the bolts which enter therein for the purpose of
locking the said doors.
Dated this 17th day of Inly 1801
RAYNER & CASSELL,
37, Chancery Lane, London, W.C., Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Means or Apparatus for Locking up Railway
Carriage Doors.
I, EDWARD GARNETT of 17, Barkworth Road Rotherhithe New Road London,
S.E. Engineer's Fitter, 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 :-
My invention relates to improvements in means or apparatus for locking up
railway carriage doors and has for its object to prevent the number of accidents
occurring constantly to passengers who are foolhardy enough to alight from their

page_text: compartments before the train has come to a standstill, or attempt to enter a railway
compartment whilst the train is in motion.
The apparatus which I have devised may be operated by the guard in his van,
or by the engine driver, and is actuated from the vacuum brake of the train, the
connection therewith being effected in any suitable manner.
Provision is also made in the case of the locking apparatus being actuated, while
one or more of the carriage doors are opened for these doors to be accordingly shut
in the ordinary manner although they cannot be subsequently opened by the
passengers In case of a severance occurring in the train, the doors are auto-
matically unlocked. In carrying my invention into practice I fix in any suitable
manner to the lower part of the carriage frame and close to each door a guide plate
within which can slide to and fro a casing containing a bolt upon the inner end
which is coiled a spiral spring while its outer end terminates with a latch cut slantly
outwards and projecting out of the said casing.
One end of the spring bears upon the end of the casing, and the other against
the inner flange of the latch. The end of the casing which is furthest from the
door terminates with a perforated head connected to the corresponding end of the
lever, whereby the apparatus is actuated with the aid of the vacuum brake by
the guard. At the lower part of the carriage doors are fixed suitable recesses
provided with striking plates placed opposite the bolts which enter therein for the
purpose of locking the said doors.
In the accompanying drawings,
Figure 1 is a side clevation partly in section of a portion of a railway carriage
door and door frame, illustrating the application of my invention thereto the door
being unlocked.
Figure 2 is a horizontal section of the locking mechanism showing the bolt in its
locked position.
Figure 3 is an end view of the locking bolt case.
Figure 3ª is a section to a larger scale of the striking plate and latch box or
cover.
Figure 4 is an inside view of a modification of the locking bolt and
Figure 5 a section on line x x of Fig. 4.
Figure 6 is a side elevation of a portion of a railway carriage showing the means
for operating the locking mechanism.
Like letters of reference indicate corresponding parts throughout the figures.
The locking mechanism shown in Figures 1, 2 3 and 34 consists of a casing a
containing a bolt 6 and sliding within a guide plate c. A spiral spring d is coiled
upon a part of the bolt which terminates with a bevil latch piece e which projects
out of the said casing a when the door is locked, but is drawn back to open the said
door, the bolt receding in a recess formed in the casing a, 61 is a striking plate
fixed opposite the bolt to the carriage door and constructed in the form of a shield 6³
to preserve the latch from the effects of the weather.
This bolt is operated by the upper end of the lever y pivotted at / to the frame
and the lower end of which is connected to the rod hereinafter referred to in
Figure 6 in connection with the modified locking mechanism illustrated in Figs. 4
and 5 and which I use by preference.
•
This last mechanism consists of a casing a containing a bolt 6 sliding between to
two guide posts k and projecting when the door is locked through an opening
formed in the front part of the said casing. This bolt is actuated by the slotted
tumbler which is guided by the two posts k aforesaid and by another post m.
A spring blade n is fixed at one end in the casing a and bears at the other upon
the back of the bolt 6 which is terminated in front with a bevil latch piece e and at
the rear with a curved heel piece o against the side of which slides the corre-
spondingly curved rear edge of the tumbler l.
The latter is furthermore guided through an opening formed in the lower end of
the casing a being articulated beyond this casing to a rod p terminated inwardly

page_text: with a fork and connected outwardly to one arm of a crank lever 9 the other arm r
of which is jointed to one extremity of the rod i (Fig. 6).
The other end of the rod i is articulated to one arm of another bell crank
lever q whose other arm is connected to a rod p' similar to the rod p and jointed
to another locking mechanism such as described with reference to Figures 4
and 5.
The lever is likewise connected by rods, to a levert pivotted upon an axis t¹
supported by a bearing fixed to the carriage frame.
Upon this axis t' is likewise mounted one end of an arm n the other end of which
is connected to the lower extremity of a piston rod v.
The piston fixed to the latter rod moves in the vacuum cylinder w provided with
a branch pipe w' connected to a vacuum pipe P extending along one side of the
train. A similar apparatus is fitted to the other side of the carriage to operate the
locking bolts of the opposite doors.
The lever is also connected by a rod y to another bell crank locking lever =
pivotted to the carriage frame. The doors of the train are provided with the
usual locking handles. The piston of each vacuum cylinder w is operated by the
engine driver in a similar manner to that of the vacuum brakes and the carriage
doors are simultaneously unlocked or locked as required on either side of the train.
Should a door have been left open by inadvertence so that it could not be locked
up by the vacuum mechanism, it can be easily locked by hand from inside by
merely pulling the door to in the usual way, the bevil latch sliding readily into its
recess.
The bell crank levers 7 y' and z are carried by brackets underneath the foot
board of the carriage, the extensions of the tumblers passing through openings
formed in the said foot board and the locking bolts may be operated by means of
air pressure or steam instead of by a vacuum.
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 mechanism for simultaneously locking up the carriage doors of a railway
train by means of vacuum, air pressure, or steam substantially as herein described
and shown in Figures 1, 2, 3, 34 and 6 of the accompanying drawings.
2. The modified locking mechanism arranged and constructed substantially as
herein described and shown in Figures 4, 5 and 6 of the accompanying drawings and
for the purpose set forth.
Dated this 19th do- 1001
RAYNER & CASSELL,
37, Chancery Lane, W.C., Agents for the Applicant.