IMPROVEMENTS IN FASTENINGS FOR CARRIAGE DOORS, SUCH IMPROVEMENTS BEING ALSO APPLICABLE FOR FASTENINGS USED FOR OTHER PURPOSES."
Year: 1880

page_text: *4
LETTERS PATENT to William Henry Saint Aubin, of Willenhall, in the
County of Stafford, Pattern Maker, for an Invention of IMPROVEMENTS IN
FASTENINGS FOR CARRIAGE DOORS, SUCH IMPROVEMENTS BEING ALSO
APPLICABLE FOR FASTENINGS USED FOR OTHER PURPOSES."
PROVISIONAL SPECIFICATION left by the said William Henry Saint
Aubin at the Office of the Commissioners of Patents on the 7th October
1880.
WILLIAM HENRY. SAINT AUBIN, of Willenhall, in the County of Stafford,
Pattern Maker. "IMPROVEMENTS IN FASTENINGS FOR CARRIAGE DOORS, SUCH
IMPROVEMENTS BEING ALSO APPLICABLE FOR FASTENINGS USED FOR OTHER
PURPOSES."
I will first describe my improvements as they relate to the fastenings for railway
carriage doors, after which their application to other purposes will be sufficiently
plain without need for special description.
The improvements, as they relate to fastenings for railway carriage doors, refer
to the lock which is opened by means of the usual handle. This lock, constructed
according to my Invention, consists of two main parts, namely, a striking bolt and a
square headed bolt. The striking bolt is preferably bevilled each way to act either
handed as required, and is carried upon a vertical shank or plate working on a
stud at the lower end of the case, and at a little distance back from the fore plate.
The striking bolt is pressed forwards with the bevilled part projecting through the
fore-plate by means of a feather spring or other spring. The tail end of the square
headed bolt projects downwards, and carries a stud which gears into a slot within
the horn of the follower, by which means the square headed bolt is withdrawn
when the handle is turned. The square headed bolt is pressed forwards by means
of a suitable spring bearing against it, and is guided by a stud projecting through
a slot therein, or by any suitable means. A part behind the head of the striking
bolt is formed to a convex curve, struck from the stud upon which the shank or
plate aforesaid works, and a corresponding concave curve is formed on the under
side of the square headed bolt immediately behind the part which is shot forwards

page_text: -When the
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through the fore-plate. The action of the lock is as follows, namely
door is being closed the striking bolt is pushed back by pressing against a plain
part of the striking plate, and thus the convex curve on the part at the back of
the striking bolt head is moved out of the concave curve on the square headed bolt,
and releases the square headed bolt, which was previously held back by the curves
aforesaid coinciding. The square headed bolt is then shot forwards by its spring
into an opening formed in the striking plate to receive it. The door is thus
securely fastened. As the square headed bolt is drawn back the concave curve
comes back into its former position, and as the door is opened the striking bolt is
shot forwards again by its spring, and the square headed bolt thus held back by
the curves aforesaid again coinciding.
This Invention may be used for various purposes, such, for instance, as for
fastenings for carriage and other doors generally, sash fasteners, and for fastenings
for most purposes where analogous fastenings are required, as will be readily
understood.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said William Henry Saint Aubin in the Great Seal Patent Office on
the 6th April 1881.
WILLIAM HENRY SAINT AUBIN, formerly of Willenhall, now of Bloxwich, in
the County of Stafford, Pattern Maker. "IMPROVEMENTS IN FASTENINGS For
CARRIAGE DOORS, SUCH IMPROVEMENTS BEING ALSO APPLICABLE FOR FASTENINGS
USED FOR OTHER PURPOSES."
I will first describe my Invention as it relates to fastenings for railway carriage
doors, after which its application to fastenings for other purposes will be sufficiently
plain without need for special description.
This Invention, as it relates to fastenings for railway carriage doors, refers to the
lock which is opened by means of the usual handle. This lock, constructed
according to one modification of my Invention, consists of two main parts, namely,
a striking-bolt and a square-headed bolt. The striking bolt is preferably bevilled
each way to act either-handed, as required, and is carried upon a vertical shank or
plate working on a stud at the lower end of the case, and at a little distance back
from the fore-plate. When the door is open the striking-bolt is pressed forwards with
the bevilled part projecting through the fore-plate by means of a feather spring or
other spring. The tail end of the square-headed bolt projects downwards, and
carries a stud which gears into a slot within the horn of the follower, by which
means the square-headed bolt is withdrawn when the handle is turned. The
square-headed bolt is pressed forwards by means of a suitable spring bearing
against it, and is guided by a stud projecting through a slot therein, or by any
suitable means. A part behind the head of the striking-bolt is formed to a convex
curve struck from the stud upon which the shank or plate aforesaid works, and a
corresponding concave curve is formed on the underside of the square-headed

page_text: bolt immediately behind the part thereof which is shot forwards through the fore-
plate to fasten the door.
The action of the lock is as follows, namely:-When the door is being closed the
striking-bolt is pressed back by pressing against a plain or lipped part of the
striking-plate, and thus the convex curve on the part at the back of the striking-
bolt head is moved out of the concave curve on the square-headed bolt, and releases
the square-headed bolt which was previously held back by the curves aforesaid
coinciding. The square-headed bolt is then shot forwards by its spring into an
opening formed in the striking-plate to receive it, and the door is thus securely
fastened. As the square-headed bolt is drawn back the concave curve comes back
into its former position, and as the door is opened clear of the striking-plate, the
striking-bolt is shot forwards again by its spring, and the square-headed bolt thus
held back by the curves aforesaid again coinciding.
According to another modification of this Invention, as it relates to railway
carriage door fastenings, the striking-bolt may be placed above the square-headed
bolt instead of below, and the horn of the follower be made to gear with a stud
upon the tail of the square-headed bolt, which in this case may be straight and not
projecting downwards, as in the modification before described.
This Invention may be applied to fastenings for various purposes, such, for
instance, as fastenings for carriage and other doors generally, sash fasteners, and
fastenings for most purposes where analogous fastenings are required, as will be
readily understood.
Having thus stated the nature of my said Invention, I will now proceed more
particularly to describe and ascertain the manner of performing the same with
reference to the accompanying Drawings.
Figure 1 is an elevation, with the cap-plate removed, of a railway carriage door
fastener constructed according to the first-mentioned modification of my Invention.
The mechanism is shewn in the position due to the door being open. Figure 2 is
a similar view to Figure 1, but the mechanism is shewn in the position due to the
door being fastened, and the striking-plate (which is omitted in Figure 1) is shewn
in section by Figure 2; Figure 3 is a plan of Figure 1, but the striking-plate is
shewn in section. A is the fore-plate of the lock case; B, the striking-bolt; and
C, the square-headed bolt. The striking-bolt B is carried on the stud a, which also
carries the feather-spring b. The spring b bears against the stud c on the vertical
shank or plate D of the striking-bolt B, and against the stud d fixed to the lock
case, and thus presses the bolt B forward with the part e projecting through the
fore-plate A, as is shewn by Figure 1, when the door is open. The part e is
shaped bevilled each way, as shewn at Figure 3, so as to be double-handed. A
part fis formed out at the back of the bolt B, and the part g thereof is curved, as
shewn, to a radius from the centre of the stud a. The bolt C slides upon the
stud E, and has its tail end turned down, as shewn at F, and continued to the
part G, which carries the stud h for gearing into the slot in the horn of
the follower H. The bolt C is pressed forwards by the feather-spring i, carried
by the stud . The curve l, on the underside of the bolt C, is struck to the same
radius as the curve g on the part f of the bolt B, and coincides with the curve g
when the bolts are in the relative position shewn by Figure 1. When the door is
being pushed shut the part e is forced back by striking against the striking-plate J,
and the curve g passes out of contact with the curve l, thus releasing the bolt C,
which is consequently shot forwards as soon as it comes opposite to the opening
through the striking-plate to receive it. There is of course no opening in the
striking-plate J opposite to the striking-bolt, the striking plate being solid at that
part. The backward position of the bolt B, and the forward position of the bolt C,
are clearly shewn by Figure 2. The door is unfastened by means of the ordinary
handle acting through the medium of the follower H, and drawing back the bolt C
into its position shewn by Figure 1. As the door is pulled open after being
unfastened, the bolt B is pressed forwards again as the front of the part e passes off
the striking-plate, and the part e projects again beyond the fore-plate, and the

page_text: curved part g locks the curved part 7 of the bolt C, as shewn by Figure 1. The
part of the striking-plate J, with which the bevilled part e comes in contact, is
preferably shaped off, as shewn at m, m, so as to cause less shock in closing the
door. Each side is shaped off, as shewn, so as to be double-handed, but of course
only one side is really needed. Figure 4 is a vertical section through the lock case,
shewing the bolt C and follower H in front elevation; and Figure 5 is a front
elevation of the bolt B. The parts are lettered to correspond with Figures 1, 2,
and 3. The part F of the square-headed bolt-tail is hollow, as shewn, from the
inside of the front plate thereof to the opposite side of the lock case, to receive the
part on the bolt B when the same is pushed back into the position shewn at
Figure 2.
Figure 6 is a corresponding view to Figure 1, but illustrates a carriage door
fastener constructed according to the second-mentioned modification of my Inven-
In this case the
tion. Bis the striking-bolt, and C' the square-headed bolt.
striking-bolt is above the square-headed bolt, and the curves g' and correspond
respectively to the curves g and 7 of Figure 1. The bolt B¹ is pressed forwards by
a spring n, as shewn, and the bolt B¹ turns on the stud a¹. From what has been
described, with reference to the first-mentioned modification, this second modifica-
tion will now be readily understood without need for further description.
The application of this Invention to fastenings for various other purposes, such,
for instance, as fastenings for carriage and other doors generally, sash fasteners, and
fastenings for most purposes where analogous fastenings are required, will now be
readily understood without need for special description.
Having now stated the nature of my said Invention, and particularly described
and ascertained the manner of performing the same, I declare that I do not limit
myself to the exact details as shewn, as such may be varied without departing
from the nature of my Invention; but what I claim as my Invention and desire
to secure by the herein-before in-part-recited Letters Patent is,-
The construction and employment of fasteners for railway carriage and other
doors, and for other purposes as herein-before mentioned, in which a striking-bolt
is hinged within the case, and acts by being forced alternately out from and into
the case, and is made to interlock with a square-headed bolt and to operate in
conjunction therewith, substantially as and for the purpose herein described and
illustrated, in two modifications, by the Drawings or any mere modification
thereof.
In witness whereof, I, the said William Henry Saint Aubin, have hereunto
set my hand and seal, this Fifth day of April, in the year of our Lord
nights ong
W. H. ST. AUBIN.
(L.S.)
Witness,
HENRY CHILTON,
Clerk to Stephen Watkins, Assoc. M. Inst. C.E.,
Office for Patents,
Wolverhampton.