An Improved Safety-lock, chiefly designed for the Doors of Railway Trucks, Vans, and the like.
Year: 1897

page_text: Date of Application, 8th June, 1897-Accepted, 7th Aug., 1897
An Improved Safety-lock, chiefly designed for the Doors of Railway
Trucks, Vans, and the like.
I, COLOMAN STEFÁN, of Wahringer Gürtel, Vienna XVIII, in the Empire of
Austria, 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 safety-lock with a pivotally connected
pawl serving to close apartments of all kinds but more especially designed for
locking railway trucks.
The characteristic feature of this lock consists in a device which on opening the
lock, displaces a holder, carrying a controlling mark, into a position which allows
of the said mark being exchanged, whilst during the closing of the lock the said
device replaces the holder together with the newly inserted mark into the original
position.
This invention is shown in the accompanying drawing, in which
Figure 1 represents the safety lock having its rear plate or cover removed..
Figures 2 and 3 are front elevations, with and without the box, containing the
controlling mark, respectively, and
Figure 4 represents the key.
Figure 5 represents a detail view of part of the mechanism.
The pawl G pivotally fixed to the bolt or pin v has a notch k provided at its rear
end extending into the casing of the lock; into this notch engages the locking
bolt F when the pawl is turned down into the locking position thereby fixing the
pawl G in such position.
The locking bolt is actuated on the one hand by the spiral spring n and on the other
hand by a lever E, which latter through the medium of the pin s engages with
a slot of the locking bolt and by counteracting the spring action, withdraws the
bolt from the notch k, when the said bolt is displaced by turning the lock-nut A.
The latter, together with a disc O, is fixed upon a shaft forming the axis for
the key-barrel and is turned by the key J slid upon this shaft, which said key acts
with a nose upon a spring, which keeps the disc 0 in the locking position
and is turned back for the purpose of releasing the disc.
The lock-nut A turned together with the disc O by the key, presses with one arm
upon the lever E and with the other arm upon a lever B, which latter on its part
acts upon a one-armed lever D which is normally held in a lifted position by the
spiral spring m. In a slot provided on this lever, the pin r of the holder S is
guided, which latter holds the controlling mark and can be vertically displaced
between suitable guides of the box C provided with a glass-covered inspection-hole.
This said box is closed below by a door t, which by means of the guide-mechanism h
is brought into such a connection with the holder S, as to be thrown open when the
said holder descends, and to be closed when it ascends.
The lever D is further provided with a spring-actuated hook d, which, when the
lever D is pressed down engages with a lever f pivotally arranged on the locking
bolt F. and thus prevents the lever D or the holder S respectively from rising.

page_text: The lever f (see Fig. 5) is a one armed lever pivoted at one extremity to the
bolt and provided at its opposite free end with a nose or projection f. This
lateral nose or projection passes through a longitudinal slot u in the lock-box
and when the bolt with the lever f is making its movement the nose f' slides
underneath the rib p of the roller $ and thus prevents the latter from moving
downwards. If the controlling mark is damaged, which is done by the action of
a knife blade L fixed to the disc O, this proves that the lock has been opened.
By the lock-nut A, turned through the medium of the key, the lever E as well
as the lever B are moved, after the controlling mark has been damaged. The
lever Bacts upon the lever D and depresses the latter, so that the holder S is
pushed down. The lever E moves the locking bolt F back and the pawl thereby
released, can be turned in the direction of the arrow. During this operation the
hook d moved downwardly, passes along an inclined plane of the nose of the
lever drawn back with the locking bolt F and arrives beneath the nose, with
which it engages as soon as in the open position of the lock-the locking bolt,
guided along the curved rear end of the pawl during the upward movement
of the latter, is pushed forward by the pressure of its spring n, against the oblique
lateral surface (in Figure 1 the top surface) of the pawl G whereby' also the nose
of the lever engages with the hook d..
The holder F is thus prevented from receding; a fresh controlling mark may
then be placed into the holder pushed out of its box C.
On closing the lock by turning down the pawl, first the lever f releases the
hook d, owing to the fact that the locking bolt F together with the lever fis
pushed slightly backwards through the downward movement of the pawl G, and
the spiral spring m, then thrown into action, lifts the lever E and the holder S
into the former position, during which operation the door t closes simultaneously.
Thereupon the spiral spring n commences to act and presses the previously moved
back locking-bolt F into the notch of the pawl. As the locking bolt is forced
forward, the nose of the lever f moving, in the slot u, passes beneath the rib p
of the holder S and thereby efficiently prevents the latter from moving.
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:-
An improved controllable safety-lock with a device for displacing the holder,
carrying the controlling mark, into a position permitting of the said mark being
exchanged, the characteristic features being two levers B and E, displaceable by
the lock-nut A, the first named lever (13) of which moves the holder S by means
of the lever D, out of the box and simultaneously opens the door t, whilst the
lever E draws the locking bolt F back, during which operation a lever f, pivotally
connected to said bolt, is brought into engagement with a hook d of the lever D,
thereby retaining the holder in its lowered position, whilst on the other hand,
on turning down the pawl, the said lever f releases the hook d, after the locking
bolt has caught, and retains the holder in its lifted position.
Dated this 8th dow of June 1907
HASELTINE, LAKE & Co.,
45 Southampton Buildings, London, W.C., Agents for the Applicant.