Improvements in Means for Securing Railway Carriage Doors while a Train is in Motion.
Year: 1899

page_text: Date of Application, 15th Aug., 1899
Complete Specification Left, 15th May, 1900-Accepted, 28th July, 1900
PROVISIONAL SPECIFICATION.
Improvements in Means for Securing Railway Carriage Doors while a
Train is in Motion.
I, JOHN JAMES SMITH, of 119, White Hart Lane, Barnes, London, S.W.,
Solicitor's Managing Clerk, do hereby declare the nature of this invention
to be as follows:
An improved method for securing railway carriage doors by automatic action
caused by the pressure of the atmosphere (while a railway carriage to which the
apparatus is attached is in motion) on a plate or plates suspended from a rail-
way carriage.
The apparatus or contrivance is broadly described as follows—The letters being
used for distinctness only.
There shall be suspended from the underside of a railway carriage from side
to side thereof a rod A" working as an axle to which is attached a plate "B"
"A" shall be fixed at right angles
hanging therefrom. To the ends of the rod
thereto a shorter rod "C" to the ends of which shall be hinged two rods "D, D"
which latter hinged rods shall be kept into position so as to work up & down
looseley.
Running along the underside (longitudinally) of the railway carriage & imme-
a further rod "E"
diately under the bottom part of the doors shall be suspended
working as an axle to which shall be fixed at intervals under each door studs
radiating therefrom. From the bottom part of each door shall be suspended
bolts "F" which shall fit into catches fixed so as to receive the bolts.
The action of the apparatus is as follows
On a train being in motion the current of air caused thereby deflects the
plate "B" which throws up one or the other of the hinged rods "1 1" thus
acting on the rod "E" which in turn lifts the catches which receive the bolts "F"
& so secure a closed door while a train is in motion & by gravitation acting on
the plate "B" releasing the bolts "F" when a train is not in motion.
It is claimed that the attachment of the parts constituting the apparatus may
be made to any suitable portion of a railway carriage according to variation in
construction thereof & that the apparatus in a modified form may be fixed under
or contiguous to each door of a railway carriage to the same end.
Dated this 14th day 01 August 18993.
JOHN JAN. Min.
14th day of ANGUSE 1000
JOHN JAN. DAIL
COMPLETE SPECI
Improvements in Means for Securing Railway Carriage Doors while a
Train is in Motion.
I, JOHN JAMES SMITH, of 119, White Hart Lane, Barnes, London, S.W.,
Solicitor's Managing Clerk, do hereby declare the nature of this invention
COMPLEIN DIM
Improvements in Means for Securing Railway Carriage Doors while a
Train is in Motion.
I, JOHN JAMES SMITH, of 119, White Hart Lane, Barnes, London, S.W.,
Solicitor's Managing Clerk, do hereby declare the nature of this invention

page_text: and in what manner the same is to be performed to be particularly described and
ascertained in and by the following statement:-
This invention relates to means for automatically securing the doors of rail-
way carriages, when the train is in motion.
In order that my said invention may be better understood I will now proceed
to describe the same with reference to the drawings accompanying this specifi-
cation in which Fig. 1 is an elevation shewing the apparatus as it would be
arranged when a separate vane or plate is provided for each door: Fig. 2 is an
elevation shewing how one vane may be employed to lock a number of doors:
Fig. 3 is a sectional elevation shewing the same arrangement as Fig. 2.
The same letters of reference are employed to denote the same parts in all
the views.
Referring to Fig. 1, it will be seen that a vane « is suspended from the foot
board 6 of the carriage. In this case the vane a is of the same width as the foot
board. A cross piece c is fixed to the top of the vane a, and to this cross piece c
are hinged two approximately vertical rods d d'. e IS a guide piece to the
rods d d.
On reference to Figs. 2 and 3 it will be seen that the vane in this case is
beneath the carriage instead of beneath the foot board and therefore it can be
nearly the width of the carriage. The rods are, in these views, shewn
attached to the rod f which carries the vane .
In Figs. 2 and 3, 9 shews a rod extending along the train just below the
carriage doors i. Fixed to this rod are pins h (see Fig. 3) one below each
carriage door i. A pin or bolt j is attached to the under side of the door i, as
shewn in all the figs. kkk are flaps hinged at m m m, immediately below
the bolts j. Each flap has a hole in it, so that the flap may, when raised, encircle
the bolt. The pins h on the rod g are exactly beneath the flaps k. n Figs. 2
and 3 are projections from the rod g, placed immediately above the vertical
rods d d. In Fig. 1 the rods d d are shewn acting directly upon the flap k
and the rod g, pins h and projections nare dispensed with..
When the current of air caused by the motion of the train moves the vane a
(in either direction) the rod d or (according to the direction) is given an
upward motion (as will be clearly seen on reference to Fig. 1) so that, in the
case of the arrangement shewn in Fig. the rod dor d' would press against the
flap k, thus raising it so that it engages with the bolt j and locks the door; or
in the case of the arrangement shewn at Figs. 2 and 3, the rod d or d¹ would
press against the projection n and turn the rod g, so that the pins h press against
and raise the flaps k.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is: -
1. The means of securing railway carriage doors, while a train is in motion,
substantially as set forth.
2. Securing railway carriage doors, while the train is in motion, by means of
locking mechanism controlled by flaps or vanes actuated by the current of air
produced by the motion of the train.
BROWNE & Co.,
Agents for the Applicant, 9, Warwick Court, Gray's Inn, London, W.C.