Improvements in Locks for Railway Carriage and other Doors.
Year: 1893

page_text: Date of Application, 11th Apr., 1893
Complete Specification Left, 20th Dec., 1893-Accepted, 20th Jan., 1894
PROVISIONAL SPECIFICATION.
Improvements in Locks for Railway Carriage and other Doors.
I, LEON RAPHAEL LECELLIER, of Villedieu (Manche) France, Lock
Manufacturer, do hereby declare the nature of this invention to be as follows:-
This invention relates to an improved system of automatic safety lock which is
more particularly intended for the doors of railway carriages, but which may be
also employed with equal advantage in other situations. The advantages of this
improved lock are its great simplicity of construction and action, absolute security
being at same time ensured by the automatic locking of the inside handle which
is so mounted that the door can only be opened from the inside by a movement
which cannot accidentally be produced.
The invention is illustrated in the accompanying drawings, forming part of this
Specification, as applied to a railway carriage door.
Figure 1 shews a face view of the lock with its handle, as seen from the interior
of the compartment.
Figure 2 represents a similar view of the lock, on a larger scale, with the cover
plate removed for the purpose of shewing the mechanism in the locked position.
Figure 3 is a horizontal section on line 1-2, Figure 2.
Figure 4 is a part-sectional elevation taken in a plane at right angles to Figure 2,
also with the fastening in the locked position.
Figure 5 shews the inside handle in the position to which it must be moved before
the door can be opened from the interior of the compartment.
Figure 6 is an end view and horizontal section, shewing the application to the
locking bolt of a spring catch.
Figure 7 is an inside face view, and Figure 8 a plan, of the lock with a slightly
modified arrangement of inside handle.
Figure 9 is a horizontal section, shewing the position of the inside handle when
the door is closed, and Figure 10 is a similar section shewing the position to which
said handle must be moved to enable the door to be opened from the interior of the
compartment.
Figure 11 shews the clutch connecting the handle to the lock spindle.
Figure 12, 13, and 14, shew respectively an inside face view, plan, and horizontal
section, of a modified construction of the inside handle locking arrangement.
Figure 15 is a sectional view of a modified arrangement for operating the
indicator tablet.
b
My improved lock may be applied to existing carriage doors without involving
any alteration and it occupies a very small space. The lock comprises a bolt a
provided with laterally-projecting studs d, d, fitted to slide in guide slots c formed
in the sides of the lock casing b. The bolt a is thrown, by the act of closing the
door, when it comes opposite the catch box, for which purpose the bolt has a
certain amount of lateral play in its casing (as clearly shewn in Figure 6) and is
notched so as to present a shoulder a' which when the bolt is retracted is forced by
a spring fat the opposite side of the bolt into engagement with the cover plate e
through which the bolt slides. The bolt has a projection a² on its face which, when
the door is shut into its frame, as shewn in Figure 3, strikes a plate projecting from
the catch box g, so as to disengage the shoulder a¹ from the plate e and allow the
The bolt a may be
bolt to be thrown by its spring h, as in Figures 2 and 3.
retracted by turning the outside handle i which operates the follower k on the
squared spindle 1. The opening of the door from the outside is thus effected in

page_text: the ordinary way, but in order to open it from the inside the handle i must be
specially operated. In its normal position the handle is prevented from turning by
the engagement of a clutch m¹, formed on the boss of the handle, with its fixed
counterpart m, as shewn in Figure 4, but this locking may be effected by any
suitable form of clutch. The part m' is shewn as being pressed into engagement
with the part m by a spring n about the squared end of spindle and enclosed
within the cap o.
To open the door by the inside handle it is necessary to
disconnect m¹ from m, thereby compressing the spring n and bringing the handle
on to the squared end of the spindle to enable it to operate the follower k. The
action of drawing back the handle by simultaneously pressing on the cap is more
particularly facilitated by employing the form of handle represented in Figure 8
which prevents all risk of the accidental opening of the door and consequently
affords absolute security.
Figures 7 to 11 shew another way in which the lever or other handle is
mounted on the spindle. The boss of the handle has a socket u forming part of a
clutch whereof the other part is on the spindle, the depth of the clutch engage-
ment being sufficient to admit of drawing back the handle, as hereafter described,
without disengaging it from the spindle. The handle is locked by a lug on the
boss of the handle which engages in a notch von the lock casing when the door
is closed. The ends of the spiral spring n are received in annular recesses in the
boss of the handle and the cap screwed on the end of spindle 1. To open the door
from the inside the handle is drawn back sufficiently to disengage lug from its
notch, the cap serving as a fulcrum if desired. The door can then be opened by
pressing down the handle in the ordinary way.
2
The handle may also be mounted as shewn in Figures 12, 13, and 14. The
handle is pivoted on pin a' in cars a carried by the boss which is loose upon the
spindle. To the end of the spindle is screwed and cottered, a nut o' provided with
a recess y¹ and having a lug y. The pivoted end of the handle has a cross-
head, the end being normally pressed into engagement by means of a
spring with a notch r in the collar of the lock casing. To open the door, the
handle is first drawn back to disengage the lug from its notch and at same time
cause the lug to enter recess y¹ and act on the lug y², when by pressing down the
handle its boss a will carry round with it the nut o¹ and spindle 1. The handle i¹
is made of such form as to permit of bringing the hand as near as possible to the
centre of motion and of pressing the thumb on the cap or nut of the spindle as a
fulcrum in drawing the handle back.
"
The lock is provided with a sliding tablet indicating whether the door is open or
shut, the means of operating which may be of the ordinary well-known or other
kind. In the example shewn in Figures 2, 3, and 4, the tablet consists of a plate p
fitted to slide up and down for the purpose of exposing the indication " open or
"shut" at an aperture made in the front of a casing a serving as a guide for the
tablet. The weight of the tablet serves to effect its downward movement, while its
upward movement is produced by a finger which lifts a plates from which
projects a pint supporting the tablet p which is notched on its bottom edge to
receive it. In Figure 15 the tablet p is shewn as raised by a lifter t¹ mounted on
the collar of spindle 1.
Dated this 11th day of April 1893.
L. R. LECELLIER,
By A. M. & Wm. Clark,
53, Chancery Lane, London, Chartered Patent Agents.

page_text: improvements in Locks for Railway Carriage and other Doors.
I LEON RAPHAËL LECELLIER of Villedieu (Manche) France, Lock
Manufacturer 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 system of automatic safety lock which is
more particularly intended for the doors of railway carriages, but which may be
also employed with equal advantage in other situations. The advantages of this
improved lock are its great simplicity of construction and action, absolute security
being at same time ensured by the automatic locking of the inside handle which is
so mounted that the door can only be opened from the inside by a movement which
cannot accidentally be produced.
The invention is illustrated in the drawings accompanying my Provisional
Specification as applied to a railway carriage door.
Figure 1 shows a face view of the lock with its handle, as seen from the interior
of the compartment.
Figure 2 represents a similar view of the lock, with the cover plate removed for
the purpose of shewing the mechanism in the locked position.
Figure 3 is a horizontal section on line 1-2, Figure 2.
Figure 4 is a part-sectional elevation taken in a plane at right angles to Figure 2,
also with the fastening in the locked position.
Figure 5 shews the inside handle in the position to which it must be moved
before the door can be opened from the interior of the compartment.
Figure 6 is an end view and horizontal section, shewing the application to the
locking bolt of a spring catch.
Figure 7 is an inside face view, and Figure 8 a plan, of the lock with a slightly
modified arrangement of inside handle.
Figure 9 is a horizontal section, shewing the position of the inside handle when
the door is closed, and Figure 10 is a similar section shewing the position to which
said handle must be moved to enable the door to be opened from the interior of the
compartment.
Figure 11 shews the clutch connecting the handle to the lock spindle.
Figures 12, 13, and 14, shew respectively an inside face view, plan, and
horizontal section, of a modified construction of the inside handle locking
arrangement.
Figure 15 is a sectional view of a modified arrangement for operating the
indicator tablet.
My improved lock may be applied to existing carriage doors without involving
any alteration and it occupies a very small space. The lock comprises a bolt a
provided with laterally-projecting studs d, d, fitted to slide in guide slots c formed in
the sides of the lock casing b. The bolt a is thrown, by the act of closing the
door, when it comes opposite the catch box, for which purpose the bolt has a certain
amount of lateral play in its casing (as clearly shewn in Figure 6) and is notched
so as to present a shoulder a¹ which when the bolt is retracted is forced by a spring f
at the opposite side of the bolt into engagement with the cover plate e. through
which the bolt slides. The bolt has a projection a² on its face which, when the
door is shut into its frame, as shewn in Figure 3, strikes a plate projecting from the
catch box 9, so as to disengage the shoulder a' from the plate e and allow the bolt
to be thrown by its spring h, as in Figures 2 and 3. The bolt a may be retracted
by turning the outside handle i which operates the follower on the squared
spindle. The opening of the door from the outside is thus effected in the ordinary
way, but in order to open it from the inside the handle i must be specially operated.

page_text: In its normal position the handle is prevented from turning by the engagement of
a clutch m', formed on the boss of the handle, with its fixed counterpart m, as
shewn in Figure 4, but this locking may be effected by any suitable form of clutch.
The part m is shewn as being pressed into engagement with the part m by a
spring n about the squared end of spindle and enclosed within the cap o.
To
open the door by the inside handle it is necessary to disconnect m from m
thereby compressing the spring n and bringing the handle on to the squared end of
the spindle to enable it to operate the follower k. The action of drawing back
the handle by simultaneously pressing on the cap o is more particularly facilitated
by employing the form of handle represented in Figure 8 which prevents all risk
of the accidental opening of the door and consequently affords absolute security.
Figures 7 to 11 shew another way in which the lever or other handle is mounted
on the spindle. The boss of the handle has a socket u forming part of a clutch
whereof the other part is on the spindle l, the depth of the clutch engagement
being sufficient to admit of drawing back the handle, as hereafter described, without
disengaging it from the spindle. "The handle is locked by a lug on the boss of
the handle which engages in a notch v on the lock casing when the door is closed.
The ends of the spiral spring n are received in annular recesses in the boss of the
handle and the cap screwed on the end of spindle 1. To open the door from the
inside the handle is drawn back sufficiently to disengage lug 2 from its notch, the cap
serving as a fulerum if desired. The door can then be opened by pressing down the
handle in the ordinary way.
The
The handle may also be mounted as shewn in Figures 12, 13, and 14.
handle is pivoted on pin x in ears a carried by the boss which is loose upon the
spindle 1. To the end of the spindle is screwed and cottered, a nut o' provided with
a recess y and having a lug y². The pivoted end of the handle has a cross-
head 3,, the end 3 being normally pressed into engagement by means of a spring fl
with a notch in the collar z of the lock casing. To open the door, the handle ¹ is
first drawn back to disengage the lug 3 from its notch and at same time cause the
lug i* to enter recess y₁ and act on the lug y², when by pressing down the handle its
boss will carry round with it the nut ol and spindle. The handle is made of
such form as to permit of bringing the hand as near as possible to the centre of
motion and of pressing the thumb on the cap or nut of the spindle as a fulcrum in
drawing the handle back.
The lock is provided with a sliding tablet indicating whether the door is open or
shut, the means of operating which may be of the ordinary well-known or other
kind. In the example shewn in Figures 2, 3, and 4, the tablet consists of a plate p
fitted to slide up and down for the purpose of exposing the indication "open" or
"shut" at an aperture made in the front of a casing 9 serving as a guide for the
tablet. The weight of the tablet serves to effect its downward movement, while its
upward movement is produced by a finger r which lifts a plate s from which
projects a pint supporting the tablet p which is notched on its bottom edge to
receive it. In Figure 15 the tablet p is shewn as raised by a lifter t¹ mounted on
the collar of spindle l.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1st. A safety lock, for railway carriage and other doors, having the handle at
the inner side of the door normally locked by a spring-actuated clutch from which
it can only be released and thrown into operative connection with the spindle, by
first drawing the handle away from the door, as specified.
2nd. In a safety lock of the kind described, the combination of the bolt adapted
to be engaged, when in its retracted position, with the lock casing by the pressure
of a spring and of a projection on the bolt adapted to strike against a projection on
the catch plate so as to thereby release the bolt and permit it to be thrown out-
⚫wards.by.its spring, into engagement with the catch plate, as specified.

page_text: 3rd. In a lock for railway carriage doors, the combination of the inside handle
normally locked by a spring-actuated clutch from which it can be disengaged and
at same time thrown into operative connection with the spindle only by being
drawn back from the door, and of a bolt adapted to be engaged by the lock casing
and to be disengaged therefrom by striking the catch plate, substantially as
specified.
4th. In a lock for railway carriage doors, the combination of the inner handle
normally locked out of operative connection with the spindle and put in operative
connection therewith by a movement away from the door, a bolt adapted to be held
retracted by the lock casing and to be released therefrom by striking the catch
plate, as described, and an indicator for shewing whether the lock is open or not,
consisting of a tablet which is raised or allowed to fall by the action of a pin or
stem, all as herein before described and illustrated in the drawings.
Dated this 20th day of December 1902
L. R. LECELLIER,
By A. M. & Wm. Clark,
53, Chancery Lane, London, Chartered Patent Agents.