Improved Means' and' Appliances for Locking Doors of Railway Carriages when in Motion.
Year: 1891

page_text: Date of Application, 25th Sept., 1891
Complete Specification Left, 27th June, 1892-Accepted, 30th July, 1892
PROVISIONAL SPECIFICATION.
Improved Means' and' Appliances for Locking Doors of Railway
Carriages when in Motion.
I, FRANK RICHARD GOMM, of Holiday Street, Great Berkhampstead,
Hertfordshire, Lithographer, do hereby declare the nature of this invention to be
as follows:-
This invention relates to improved means and appliances for locking doors of
railway carriages when in motion.
For the purpose of my invention, I connect a vane or other suitable appliance by
rods or gear wheels to a bolt or bolts, whereby when the vane is moved by the
force of the current of air caused by the motion of the train in either direction, a
bolt or catch is caused to lock a door, or any, or all the doors of the carriage.
By my invention, when the train is in motion it is impossible to open the door
but should the door be left open when started it can be readily closed, the catch
being bevilled or chamfered on one side for that purpose.
My invention is very simple and can be applied to existing railway carriages
without any alteration to the carriages.
One vane can be used to lock a single door, or the two doors of one compartment,
or the whole of the doors of a carriage but it is not intended that my system shall
be applied to the whole of the train in such a manner as to compel special coupling
of the carriages.
Various mechanical devices can be employed for the purpose intended but the
chief feature is the employment of a vane or like appliance actuated by the current
of air caused by the movement of the train for locking the door or doors of
a railway carriage.
Date : gil 11
H. GARDNER,
Per R. Core Gardner,
Patent Agent, 166, Fleet Street, London,
Agent for the said Frank Richard Gomm.
H. GARDNER,
Per R. Core Gardner,
Patent Agent, 166, Fleet Street, London,
Agent for the said Frank Richard Gomm.
COMPLETE SPECIFICATION.
Improved Means and Appliances for Locking Doors of Railway
Carriages when in Motion.
I FRANK RICHARD GOмM of Holiday Street, Great Berkhampstead,
Hertfordshire, Lithographer, 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 :-
This invention relates to improved means and appliances for locking doors of
railway carriages when in motion.
For the purpose of my invention 1 connect a vane or other suitable appliance by
rods or gear wheels to a bolt or bolts whereby when the vane is moved by the
force of the current of air caused by the motion of the train in either direction
a bolt or catch is caused to lock a door or any or all of the doors of a carriage.
My invention is of the simplest possible construction and can be applied to
existing railway coaches.
Figure 1 of the annexed drawings represents part of a coach body X and door Y
with bolts A, A, on bar B pivotted at C the lower end of the bar B having a flat
plate D exposed beneath the carriage for the wind to act upon and force sideways

page_text: for either bolt to enter the edge of the door when the coach is travelling but
which bar B is sufficiently weighted at bottom to hang when the coach is
standing.
According to Figure 2 the bolts A, A, are like wings from the same pivot C_so
that one of them must engage in the crescent shaped slot E or come over the. edge
outside the door while travelling and become free by the weight of the bottom
plate D by its pendulous action when the vehicle slows down and stops.
At Figure 3 this order is reversed by attachment above the door the bolts A, A,
forming the "bob" for pendularious motion.
By this invention a single door of a railway carriage can be automatically locked
while the vehicle is running and be automatically unlocked while the coach ceases
running and while at a standstill or two opposite doors of the same compartment
can be locked from the movement of one wind plate or all the doors on one or on
both sides of a railway coach can be automatically locked and unlocked from one
wind plate.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
Pivotting a double bolt and wind plate appliance to a railway coach or carriage
for automatically locking a door or doors of same while travelling and for auto-
matically unlocking such door or doors as described and constructed substantially
in the manner shown by the annexed drawings.
H. GARDNER,
Patent Agent, 166, Fleet Street, London,
Agent for F. R. Gomm.
H. GARDNER,
Patent Agent, 166, Fleet Street, London,
Agent for F. R. Gomm.