IMPROVEMENTS IN LOCKS FOR RAILWAY AND OTHER CARRIAGE DOORS, AND OTHER ANALAGOUS PURPOSES
Year: 1884

page_text: PROVISIONAL SPECIFICATION.
I, WILLIAM HENRY SAINT AUBIN of Bloxwich in the County of Stafford,
Mechanician and Patent Agent, do hereby declare the nature of said Invention
for IMPROVEMENTS IN LOCKS FOR RAILWAY AND OTHER CARRIAGE DOORS, AND
OTHER ANALAGOUS PURPOSES to be as follows:-
The object of my improvements is the simplification of the construction of
locks for the aforesaid purposes by dispensing with the antiquated method of
pressing a number of parts out of wrought iron, which aro afterwards rivetted
and brazed together in order to form the lock caso.
I also dispense with the old fashioned cumbrous main-spring (at all times so
liable to break) and thereby produce a more pleasant, smooth and uniform action
of the bolt.
In constructing a lock according to my improvements, I cast the body of the
lock case complete in one part and the front or fore-end separately in another part
and in such a way as to admit of the insertion of a bolt, such as is ordinarily
employed in all common railway locks. In order to accomplish this I form a
semicircle in the body of the lock case on either side, and from a little distance on
either sido of these semicircles I form an angular open space towards the front of
the lock case. On either side of the front of the body of the lock caso I employ
a short projecting pieco which fits into a recess cast in the under side of the front
or fore-end of the lock.
This front or fore-end has two projecting lips or pieces on the under side of it
which fit into and coincide with the angular open space in the body of the lock
case on either side, and in the ends of these lips or picces, farthest from the front
or fore-end I also form a semicircle.
I then insert the bolt into the body of the lock case, the circular bosses or axis
of the same falling into the semicircle on either side. The short projecting pieces
on either side of the body of the lock case I then insert into the recess on the
under side of the front or forc-end, and by virtue of the lips or pieces thereon
coinciding with the open spaces in the body of the lock case, the two semicircles
meet together and firmly support the axis of the bolt. The body of the lock case
and the front or fore-end are then secured together by means of screws passing

page_text: through the short projecting pieces on either side of the body of the lock case and
the front or forc-end.
At the back of the bolt, in lieu of a mainspring, I employ a lever turning and
working upon a centre pin which I pass through the lock case, one end of the said
lever bearing against the bolt, and being actuated by a spiral spring pressing 5
against the other end, and being held in position by virtue of its being held down
by the under side of the front or fore-end and guided by a small projecting lip,
also on the under side of the front or fore-end, such lip fitting within the body of
the lock case.
I may too, if found desirable, hereafter employ a roller in that part of the bolt 1
which works upon the lever. My only claim however in this respect will bo that
of the roller being the same thickness as the bolt, supported by cheeks upon either
side of the bolt and working in slots on either sido the lock casc.
I do not however'strictly confine myself to the exact details herein described
as the same may be open to somo slight modification.

page_text: I, WILLIAM HENRY SAINT AUBIN of Bloxwich in the County of Stafford,
Mechanician and Patont Agent do hereby declare the nature of my Invention
for IMPROVEMENTS IN LOCKS FOR RAILWAY AND OTHER CARRIAGE DOORS, AND
OTHER ANALAGOUS PURPOSES and in what manner the same is to be performed,
to be particularly described and ascertained in and by the following statement:-
The object of my improvements is the simplification of the construction of
locks for the aforesaid purposes, by dispensing with the antiquated method of
pressing a number of parts out of wrought iron, which are afterwards rivetted
and brazed together in order to form the lock case.
I also dispense with the old-fashioned cumbrous mainspring (at all times so
liable to break) and thereby produce a more pleasant, smooth and uniform action
of the bolt.
In constructing a lock according to my improvements, I cast the body of the
lock case Fig. 3, complete in one part, and the front or fore-end Figs. 1 and 2,
separately in another part, and in such a way as to admit of the insertion of a
bolt, such as is ordinarily employed in all common railway locks.
In order to accomplish this I form a semicircle .a. Fig. 3, in the body of the lock
caso on either sido, and from a little distance on either side of this semicircle I
from an angular open space, b. Fig. 3, towards the front of the lock case.
On either side of the front of the body of the lock case I omploy a short
projecting piece, c. c. Fig. 3, which fits into a recess, d. d. Fig. 2, cast in the under
side of the front or fore-end of the lock.
This front or fore-end has two projecting lips or pieces .c. c. Fig. 1 on the under
side of it which fit into and coincide with the angular open space .b. Fig. 3. in the
body of the lock case on either side, and in the ends of these lips or pieces .c.
Fig. 2 farthest from the front or fore-end I also form a semicircle, g. Fig. 2.
then insert the bolt, h, into the body of the lock case as shewn in dotted
lines Fig. 4. the circular bosses or axis, 2, of the same falling into the semicircle
on either side.
The short projecting piecos, c. c, on either side of the body of the lock case I
then insert into the recoss on the under side of the front or fore-end as shown in
dotted lines Fig. 4. and by virtue of the lips or pieces, e, thereon coinciding with
the open spaces in the body of the lock case, the two semicircles meet together and
firmly support the axis of the bolt. The body of the lock case and the front or
fore-end are then secured together by means of screws, K. K. passing through the
short projecting pieces, c. c. on oither side of the body of the lock case and the
front or fore-end.
At the back of the bolt, in lieu of a mainspring, I employ a lever, 2, turning
and working upon a centre-pin, m. as shewn in dotted lines Fig. 4 which
I pass through the lock case, one end of the said lever bearing against a
projecting part, n, of the bolt Fig. 4, and being actuated by a spiral spring, o,
as shewn in dotted lines, pressing against the other end, and being held in
position by virtue of its being held down by the under side of the front or
fore-end, and guided by a small projecting lip or piece, h, Fig. 2, also on the under
side of the front or fore-end, such lip or piece fitting within the lock case. Fig. 5
is a back view of Fig. 4.
I may too, if found desirable, hereafter employ a roller in that part of the bolt
which works upon the lever.

page_text: My only claim however in this respect is that of the roller being the same
thickness as the bolt, supported by cheecks upon either side of the bolt and working
in slots on either side the lock case.
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 improved construction of locks without mainsprings as shown in
Drawings.
2. The casting of the body and fore-end of the lock cach in one piece.
3. The method of introducing the bolt into the body of the lock substantially as
herein before described and illustrated in the accompanying Drawings.
4. The employment of a roller the thickness of bolt.
Daind this 1st day of August. 1884.