An Improved Locking Device for Securing the Doors of Coal and other like Waggons."
Year: 1897

page_text: Date of Application, 2nd Nov., 1897-Accepted, 11th Dec.,
1897
COMPLETE SPECIFICATION.
"An Improved Locking Device for Securing the Doors of Coal and
other like Waggons."
We, WILLIAM SIMPSON, of 15 Wordsworth Avenue, Roath, Cardiff in the County of
Glamorgan, Ship Owner, and ALBINUSS HUNTER SCOTT, of No. 37 Metal Street,
Cardiff, in the County of Glamorgan, Engineer, 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 an improved locking device for securing the doors that
are usually fixed at the rear end of coal or other like waggons.
To the bottom beam of the waggon we attach a pair of strong hooks the hook part
being placed on top, and to the door of the waggon we attach a pair of strong
brackets, slotted at their lower ends. Working within these slots is a horizontal bar
or roller with reduced ends to act as bearings, revolving easily and capable of sliding
vertically in the slots of the aforesaid slotted brackets, the bar or roller, when down,
resting behind the hooks in the buffer beam, and thus automatically keeping the
door shut, and rendering it impossible for the door to be forced open by any pressure
from within the waggon.
In order to raise the roller and release the door, we apply a pair of cams working
on a spindle extending across either a portion or the entire length of the buffer
beam.
The bearings for carrying this cam spindle being formed in a projection in the
front of the hooks, or separate bearings may be used if necessary.
The cams being made the necessary shape and length for raising the roller easily
to clear the top part of the hook and suitable stops are provided to limit the stroke
of the cam both upwards and downwards, so that the cam shall always be in position for
unlocking the door.
In the accompanying drawings forming part of this specification Figure 1 is a
section through the door of an ordinary coal waggon, showing the application of our
locking arrangement in elevation.
Figure 2, shows a portion of the door end of a waggon with our locking arrangement
in end elevation.
Figure 3, is a detail showing the cam K, raised so as to lift the roller J up out of
the hook, and the door thereby released from the hook.
A is the buffer beam, B the buffer of the waggon, C the swinging door on the
usual hinges D, E the side of the waggon, F the hook attached to the buffer beam,
G is the bolt attached to the hook and securing it to the buffer beam. H, H are the
slotted brackets attached to the door. I is the slot in which the rocking roller J
slides vertically. K, K, are the cains keyed upon the spindle I, for raising the roller.
M are stops or lugs formed on the hooks for limiting the stroke of the cam K. N is
a stop formed upon the cam K, also for limiting the stroke of the cam in the opposite
direction. O is a lug formed upon the slotted levers H, for the cam K to press
against, so as to slightly open the door, when the roller J, is raised to the necessary
height to clear the top of the hook and thus prevent its falling back again into the
D

page_text: locked position, the pressure of the load within the waggon completing the opening
of the door.
A square L may be formed upon either or both ends of the spindle L, and a
permanent or loose lever attached thereto for releasing the door from the side of the
waggon. This lever preferably would be placed on the spindle in a convenient
position between the buffers, and in the case of solid-headed buffers, the spindle may
pass through the buffer head, as shown in the drawings.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what
we claim is :-
:-
The combination of devices as herein specified consisting of a roller or bar working
in slotted brackets or guides attached to the door of the waggon, hooks secured to
the buffer beam for engagement with the before-mentioned bar or roller, cams
secured to a transverse spindle and operated by a lever from any convenient position
for the purpose of raising the locking roller, all constructed, operated and working
substantially as hereinbefore described and illustrated.
PHILLIPS & LEIGH,
No. 22 Southampton Buildings, Chancery Lane, London, W.C.,
Agents for the Applicants.