Improved Lock for Railway Carriage and other Doors.
Year: 1895

page_text: Date of Application, 30 h July, 1895
Complete Specification Left, 20th Apr., 1896-Accepted, 23rd May, 1896
PROVISIONAL SPECIFICATION
An Improved Lock for Railway Carriage and other Doors.
We, CHARLES DARGIE, of Edward Street, Shepparton, in the Colony of
Victoria, Machinist, and SIDNEY COOKE, of No. 330 Flinders Lane, Melbourne,
in Victoria, as aforesaid, Printers' Furnisher, do hereby declare the nature of this
invention to be as follows :-
This invention of an improved lock for railway carriage and other doors is of
such a nature that when the door to which it is affixed is closed to, the lock bolt
automatically shoots out and securely fastens the door without the handle having
to be turned or even touched, in fact the handle is only used for drawing the bolts
back such as when it is desired to open the door. The lock has two sliding bolts
which work through openings at the upper part of the front edge of the lock case
and said bolts are each acted upon by a spiral or other spring arranged within the
case. The uppermost of the sliding bolts acts as the lock bolt and the lower one,
when it is pushed back or snapped against the door catch, as the medium to release
the upper bolt and allow it to shoot into its catch to lock the door.
A square
handle bar is used and upon it within the case is a cam piece, the cam of which
acts on a lever the free end part of which presses upon the sliding bolts in order to
hold them at their normal position within the case. Upon the opposite edge of
the cam piece to the cam jaw, is a gap to receive the end of a short catch lever,
the other end of which is operated on by the lowermost of the sliding bolts, said
catch lever is pressed upon by a spring to cause it to engage the gap in cam piece.
A spiral spring is arranged between the handle and the case, one end of said spring
being secured to the handle bar and the other to the case and in such a manner
that the tendency of the spring is to partially rotate the handle bar to cause a
lever handle on inside of door to pass over the door jamb whilst the bolts are being
shot outwards.
Although said spiral spring acts as aforesaid its main purpose is to draw the pin
on handle bar into the recess provided for it in the collet and thereby to lock the
handle in such position, and so make it impossible to open the lock until such time
as the pin is withdrawn. A slight lateral play is allowed between the handles for
the latter purpose.
Dated this 30th day of July 1895.
AML
An Improved Lock for Railway Carriage and other Doors.
We, CHARLES DARGIE, of Edward Street Shepparton, in the Colony of
Victoria, Machinist, and SIDNEY COOKE of No. 330 Flinders Lane, Melbourne,
in Victoria, as aforesaid, Printers' Furnisher, 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 of an improved lock for railway carriage and other doors is of

page_text: such a nature that when the door to which it is affixed is being closed to a snap
bolt on it is pressed inwards and in so doing releases a lock bolt and which latter
together with the snap bolt shoots out and passing into the catch plate securely
fastens the door without the handle having to be turned or even touched in fact
the handle is only used for drawing the bolts back such as when it is desired to
open the door. Said two sliding bolts work through openings at the upper part of
the front edge of the lock case and each are acted upon by a coiled or other spring
arranged within the case. A square handle bar is used and upon it within the
case is a cam piece, the cam of which acts on a lever the free end part of which
presses upon the sliding bolts in order to hold them back within the case. Upon
the opposite edge of the cam piece to the cam jaw, is a gap to receive the end of a
short catch lever, the other end of which is operated on by the snap bolt said
catch lever is pressed upon by a spring to cause it to engage the gap in cam piece.
When additional security in locking, is required, we arrauge a spiral spring between
the handle and the case, one end of said spring being secured to the handle bar
and the other to the case and in such a manner that the tendency of the spring is
to partially rotate the handle bar to cause a lever handle on inside of door to pass
over the door jamb whilst the bolts are being shot outwards and although said
spiral spring acts as aforesaid it is also employed to slide the handle bar to draw a
pin on it against the end of a semi-circular collet and thereby lock the handle in
such a manner that it is impossible to open the lock until the pin is lifted to upon
the surface of said collet. A slight lateral play is allowed between the handles for
the latter purpose.
In the attached drawing,-
Fig. 1 is a plan of the lock with its side plate removed in order to exhibit the
gears.
Fig. 2 a sectional view taken on liner of Fig. 1 looking towards the bolts.
Fig. 3 a sectional view on line yy of Fig. 1 looking towards the back of lock
and also shewing the front plate in dotted lines.
Fig. 4 a back view of the lock and
Fig. 5 a similar view to Fig. 1 but shewing a modified form of bolt lever for
the lock.
In Figs. 1 to 4 A is the lock case having a removable side A 1 secured by the
screws A 2, and A 3 its front plate or flange. B is the lock bolt and C the snap
bolt both fitting neatly and side by side in a hole in the front plate A 3 and each
having a hole bored in it from its back end to receive coiled springs B 1 and CI
respectively. B 2 and C2 are guide pins for the coiled springs. The lock bolt B
has a gap or recess b in it and snap bolt C a gap or recess c and against the back
of both gaps a lever D bears and which lever is centred at D 1. E is the handle
bar having a cam piece F on it and which has a gap F1 in it at the position
shewn. G is a catch lever centred at G 1 and having its end g acted on by a
spring G 2 whilst the other end of the lever works in a recess c 1 in the bolt C and
the back end e 2 of such recess acts as a tappet to work lever G and release its
end from the gap F 1. El is a
pin projecting from the handle bar E and such
pin is designed to bear against the end of the semi-circular collet E2 when the
bolts are thrown out or "locked" and to ride upon the surface of the semi-circular
collet when opening the lock by turning back the handle bar. E3 is a spiral
spring arranged loosely about the handle bar E and having one end secured to it
ate and the other end secured to the case at e 1.
In Fig. 5 all parts are similar to those already described excepting that in this
case the cam piece F is dispensed with the lever D being centred direct on the
handle bar E and the boss of lever D having the gap F1 to receive the end g of
lever G. From what has been already described the working of the lock will be
readily understood as when the bolts are thrown back by turning the handle bar
lever D will hold them thereat as it will be retained by the catch lever G and
immediately the snap bolt C is pressed inwards such as by striking against the
catch plate on the door frame the tappet c 2 strikes the end of catch lever G and

page_text: causes its other end to release the bolt lever D and which together with bolts B
and C will be immediately shot or forced outwards by the action of the coiled
springs B 1 and C 1.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is,
1. A lock for the purpose specified consisting of the snap and lock bolts acted
on by springs, the lever acted on by a cam on the handle bar and the catch lever
the end of which is acted on by a tappet on the snap bolt all arranged and
assembled in a case substantially as described and as shewn in Figs. 1 to 4 of the
drawings.
2. In a lock for the purpose specified the bolts B and C in combination with the
cam D arranged on handle bar E and with the catch lever G all assembled and
arranged substantially as described and as shewn in Fig. 5 of the drawings.
3. In a lock for the purpose specified a spring as E 3 combined with the handle
bar E and the lock case A and with the pin E 1 on the handle bar and the semi-
circular collet on the case substantially as described and as shewn in Figs. 3 and 4
of the drawings.
Dated this 20th day of April 1896.
F. WISE HOWORTH,
46, Lincoln's Inn Fields, London, W.C., Agent for the Applicants.