IMPROVE- MENTS IN LOCKS FOR CARRIAGE DOORS to be as follows:
Year: 1884

page_text: I, WALTER PAYTON of 38 Masbro Road Brook Green in the County of Middlesex,
Mechanical Engineer do hereby declare the nature of my invention for "IMPROVE-
MENTS IN LOCKS FOR CARRIAGE DOORS to be as follows:-
"
:-
My said improvements relate to that class of locks in which the handle shaft or
latch when turned in opening the door is held back by a catch which when the
door is closed is released and permits of the handle shaft or latch acting auto-
matically for the purpose of locking the door.
In carrying out the said improvements I make the body of the lock by preference
in one piece of cast metal of any suitable kind and of a length somewhat greater
than the thickness of the door to which it is to be applied. On one end of such
body and at right angles to it flanges are cast which form it into a flanged plate the
ends of which are bored to allow of the body being screwed or bolted to the carriage
door a notch or recess being made in the edge of it to receive the said body.
The handle of the lock which may be of any desired shape has cast with it or has
attached to it a circular shaft somewhat longer than the said body and the shaft is
fitted into a bearing formed in its flanged end the opposite end of the said body
having a bearing also formed in it into which is fitted a flanged socket bored to
receive the outer end of the said shaft to which it is firmly attached by cross pin
screw or otherwise in such a manner that it forms part of the said shaft and turns
with it securely in the said bearings.
On that part of the said shaft which lies between the said bearings a coiled spring
formed of steel or other suitable metal is loosely fitted one end of which is made
fast by a screw or otherwise to the body of the lock and the other end is inserted
into a slot cut in the said flanged socket and the said spring is so arranged and is
of such dimensions as will allow of the said handle and its shaft moving with a
spring action through about one fourth of a circle. The flange of the said socket is
enlarged at one part so as to form a latch which when the door is closed projects
from the edge of the lock over a striking plate fixed upon the door frame and
securely locks the door and the said flange may be also extended so as to form a
thumb piece or handle by means of which the door may be opened from that side.
Immediately below the bearing formed in the said flanged plate a rectangular
recess is formed for the purpose of receiving a double ended lever capable of partial
rotation within it upon a cross pin carried by the said Hanged plate and situated a
short distance upon one side of the centre of the said handle shaft. One end of the

page_text: said lever is made to overhang the edge of the lock to allow of its coming into
contact with the door frame at the moment the door is closing and the other end of
the said lever is turned upwards so as to form a hook the purpose of which is
explained lower down. The said lever is also controlled by a spring carried by the
said body.
The shoulder of the handle of the lock at that part which moves upon the face of
the said flanged plate is provided with two projections one of which by coming into
contact with a stud fixed in the flanged plate or aganst a raised part of the said
double ended lever acts as a stop to prevent the handle shaft moving through a
greater distance than is required for locking the door.
The other of the said projections is so arranged in relation to the said double
ended lever that when the handle shaft is turned in opening the door one of its
faces by coming into contact with a raised part of the said lever causes it to turn
upon its centre and press its overhanging end against the door frame in such a
manner as to compel the door to open through a short distance.
While the overhanging end of the said lever is so caused to move in one direction
its opposite end by moving in a contrary direction carries the hook formed upon it
into a position behind the other face of the said projection where it acts as a stop
or catch and prevents the handle shaft and the latch forming part of it turning
back into the position required to lock the door till such times as the overhanging
end of the said lever by being brought into contact with the door frame releases
the handle shaft and allows of its turning with a spring action so as to auto-
matically carry the latch into position for locking the door.
If preferred the first of the projections moving upon the flanged plate above
mentioned may be prolonged so as to form a latch in combination with a staple
fixed upon the door frame in which case the latch formed upon the flanged socket
may be dispensed with.

page_text: I WALTER PAYTON of 38 Masbro Road Brook Green in the County of Middlesex
Mechanical Engineer do hereby declare the nature of my invention for "IMPROVE-
MENTS IN LOCKS FOR CARRIAGE DOORS "
and in what manner the same is to be
performed to be particularly described and ascertained in and by the following
statement, reference being had to the annexed sheet of drawings the figures of
which illustrate a railway carriage door lock Figure 1 being a plan and Figure 2
a side elevation showing the lock in position Figure 3 an end elevatio: at A
Figure 4 an end elevation at B and Figures 5 and 6 part sections on the ine CC
Figure 3 :—
In carrying out the said improvements the body a of the lock is made by
preference in one piece and of a length somewhat greater than the thickness of the
door to which it is to be applied. At the ends of such body and at right angles to
it the plates a¹ and a² are formed each of which is bored out so as to form bearings
for the shaft b one end of which is enlarged into the handle b¹ and the other fitted
within the sleeve ca part of which is formed into the latch c¹ and the thumb piece c*.
The sleeve c is fitted into the bearing formed in the plate a² and it is secured by a
screwed pin to the shaft b so as to allow of it and the shaft rotating together
freely but without end motion in the said bearings.
Round the shaft b and between the plates a¹ and a³ is placed the coiled spring d
having one end held firmly by being bent round the pin a³ screwed into the plate a¹
and its other end fitted into a slot cut in the sleeve c for the purpose of giving a
spring action to it and the shaft b. In a groove formed in an enlarged part of the
plate a¹ the lever e is fitted the fulcrum of which is at e¹ and the end e³ of such
lever is prolonged some distance beyond one edge of such plate its other end being
formed into the hook e³ shown in Figures 5 and 6. The said lever is also provided
with a shoulder at e* and is constantly pressed in one direction by the spring e³.
In connection with the lever e and for the purpose of operating with it the two
projections g and g¹ are formed upon the shaft & one of which g₁ by contact with
the said lever acts as a stop to the shaft b and the other g is used to give motion to
the lever e in the manner described lower down.
The lock so constructed is let into and fixed upon the edge of the door the plate a¹
being fastened to its outside as shown in Figure 3 and the plate a² to its inside as
shown in Figure 4 the two striking plates hand h' being fixed upon the door frame.
In Figures 3 and 4 the full lines show the parts in their position when the door is
locked and the dotted lines show the unlocked position the handle b¹ being removed
in Figure 3 for greater clearness.
The automatic action of the lock will be readily understood from the following
description it being first noted that the door is locked by the latch c¹ being turned
over the striking plate h¹ as shown in Figure 4 and that at that time the lever e is
in the position on the striking plate shown in Figure 6.
Such being the case on turning the handle b' or the thumb piece c² so as to bring
the latch c¹ into the position shown by the dotted lines in Figure 4 the door will be
free to open but in doing so the projection g is turned into the position shown in
Figures 3 and 6 and the lever e is compelled by its spring to move into the position

page_text: shown in Figure 5 where its hooked end e³ acts as a stop to the projection g and
prevents any backward movement of the latch till such times as it is removed.
This removal is effected by the act of shutting the door as in doing so the end of
the lever e by coming in contact with the striking plate h¹ forces the lever e back
again into the position shown in Figure 6 and leaves the latch free to be auto-
matically moved by means of the coiled spring d into the locked position shown in
Figure 4.
When opening the door it will be observed that the act of turning the projection g
into the position shown in Figure 6 brings its rounded end into contact with the
shoulder e forming part of the lever e. In this way all the force used in turning
the handle d is employed in moving the lever e into the position shown in Figure 5
in doing which it acts in such a manner upon the striking plate has to compel the
door to open through a short distance.
This peculiar action is a very useful one particularly with doors which fit tightly
in their frames as great force can by its means be exerted for the purpose of
opening them.
In constructing a lock to contain my said improvements I would have it under-
stood that it is not essential that some of the details should be made exactly as
above described. The body a may be required to be varied to suit different kinds
of doors and it may be in one or more pieces as may be most convenient. In cases
also where an inside handle is not required the thumb piece c³ may be removed
from the latch or the projection gl may be prolonged so as to form a latch in
combination with the usual staple. In the latter case it may also be unnecessary to
make the lock as long as the thickness of the door to which it is to be applied.
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. Operating the handle shafts of automatic locks by means of coiled springs
substantially as specified and shown in Figures 1 and 2.
2. The combination of the shaft b and its projections g and g' with the lever e
substantially as shown and for the purpose specified.
3. The combination of parts forming the lock herein described and illustrated by
Figures 1. 2. 3. 4. 5. and 6.