Improvements in Locks and Latches.
Year: 1892

page_text: Date of Application, 24th May, 1892
Complete Specification Left, 24th Feb., 1893-Accepted, 25th Mar.. 1893
PROVISIONAL SPECIFICATION.
Improvements in Locks and Latches.
I, LEON RAPHAEL LECELLIER of Villedieu (Manche) France, Manufacturing
Locksmith, do hereby declare the nature of this invention to be as follows:
:-
This invention consists in arranging the latches or bolts of locks so that they
may be held or hooked under such conditions that a mere contact with the staple
of the projecting part of the bolt will cause the latter to spring forward and hence
to lock the door.
I have studied the manner of carrying this arrangement into practice so as to
render it applicable to ordinary locks with a minimum amount of alteration in any
case.
The accompanying drawings fully illustrate my improved bolt.
Figures 1 to 3 show the application to an ordinary lock of the releasing
mechanism of the bolt.
Figures 45 and 6 show the arrangement of the bolt provided with a stopping
groove on its bead.
Figures 7, 8 and 9 show similar arrangement wherein the bolt is provided with a
projection on its head this arrangement being applied to that class of locks which
are furnished with two knobs and are known sometimes as "Gollot's " locks.
Like letters of reference indicate corresponding parts throughout the drawings.
In order to be able to apply my present invention to an ordinary lock whichever
kind it may be and without subjecting the same to any modification the arrangement
shown in Figure 1 is used the latter being an outer view thereof. Fig. 2 is a
horizontal section of this arrangement in its locking position while Fig. 3 shows the
same in an open position.
This mechanism consists merely of a flat spring a furnished at its free extremity
with a projection 6 which engages with the projecting part of the bolt or latch d
as soon as the latter is drawn inwards as clearly shown in Figure 3.
The latch or bolt is thus held after such inward stroke and as the spring a
projects slightly beyond the projection b as soon as it meets with the staple cit
releases the latch or bolt d which is shot out under the action of its spring.
To render this arrangement applicable to existing locks I mount a flat spring
with a projection in a small box e fixed to the casing of the lock by means of screws
as shown in Figure 1 or the spring a may be rivetted or screwed in any other
nanner to the box e or to the lock.
To provide for the warping of the wood in the door frames serrations may be
formed on the bolt head so as to allow the projection 6 to hook onto the bolt or
latch whatever may be the rearward stroke of this latch.
Figures 4, 5 and 6 show the same arrangement without any foreign appendage
being connected to the ordinary lock-Fig. 6 showing the head d drawn back &
held ready to open the door.
This arrangement. consists in forming in the head d of the bolt or latch a notch
recess or groove f into which enters the projection of the plate g of the said lock
when merely imparting a slight motion to the knob.
In order that the bolt d may safely engage with the protruding edge of the
plate the spring which impels the latch or bolt is mounted in a slanting
direction and thus tends to bring the head of the bolt and hence the groove f over
the projecting edge of the plate g.
The opening formed in the front edge of the lock casing to allow the latch or
bolt to pass leaves a certain amount of play to its head which may thus freely

page_text: withdraw its recess from such opening (Figure 6). Just before the door is
thoroughly closed the head of the latch held as shown in Figure 6, meets with the
staple which causes it to leave the projecting edge of the plate and it is then shot
into the staple the full length of its stroke as under ordinary circumstances.
The same arrangements are applicable to locks having a double knob and known
as "Gollot's" locks Figures 7 and 8. The latch however instead of being recessed is
provided with a shoulder f acting in exactly the same manner as the groove of
Figures 4 to 6 by hooking onto the casing of the lock and forming a stop thereon.
In this case as in the preceding instances a small additional spring i may be used
(Figures 8 and 9) to ensure the gearing of the groove or shoulder f. The
application of the above described arrangement allows while dispensing with costly
and inconvenient door closing devices of the strength of the springs generally used
for locks being likewise decreased which facilitates their handling and renders it
safer while making it unnecessary to give a slant form to the heads of latches or
bolts or can be used with same.
Dated this 24th day of May 1892.
TONGUE & BIRKBECK,
34, Southampton Buildings, Chancery Lane, London, W.C.,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Locks and Latches.
I, LEON RAPHAEL LECELLIER of Villedieu (Manche) France Manufacturing
Locksmith, 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 consists in arranging the latches or bolts of locks so that they
may be held or hooked under such conditions that a mere contact with the staple
of the projecting part of the bolt will cause the latter to spring forward and hence
to lock the door.
I have studied the manner of carrying this arrangement into practice so as to
render it applicable to ordinary locks with a minimum amount of alteration in any
case.
Referring to the drawings left with the Provisional Specification in this case:
Figs. 1 to 3 show an ordinary lock having my present improvements applied
thereto.
Figures 45 and 6 show the arrangement of the bolt provided with a stopping
groove on its head.
Figures 7, 8 and 9 show similar arrangement wherein the bolt is provided with a
projection on its head this arrangement being applied to that class of locks which
are furnished with two knobs and are known sometimes as "Gollot's" locks.
Like letters of reference indicate corresponding parts throughout the drawings.
In order to be able to apply my present invention to an ordinary lock whichever
kind it may be and without subjecting the same to any modification the arrangement
shown in Figure 1 is used the latter being an outer view thereof. Fig. 2 is a
horizontal section of this arrangement in its locking position while Fig. 3 shows
the same in an open position.
This mechanism consists merely of a flat spring a furnished at its free extremity,
with a projection b which engages with the projecting part of the bolt or latch d
as soon as the latter is drawn inwards as clearly shown in Figure 3.
The latch or bolt is thus held after such inward stroke and as the spring a projects
slightly beyond the projection b as soon as it meets with the staple c it releases the
latch or bolt d which is shot out under the action of its spring.

page_text: To render this arrangement applicable to existing locks I mount a flat spring
with a projection in a small box e fixed to the casing of the lock by means of
screws as shown in Figure 1 or the spring a may be rivetted or screwed in any
other manner to the box e or to the lock.
To provide for the warping of the wood in the door frames serrations may be
formed on the bolt head so as to allow the projection 6 to hook onto the bolt or
latch whatever may be the rearward stroke of this latch.
Figures 4, 5 and 6 show the same arrangement without any foreign appendage
being connected to the ordinary lock-Figure 6 showing the head d drawn back
and held ready to open the door.
.
This arrangement consists in forming in the head d of the bolt or latch a notch
recess or groove into which enters the projection of the plate g of the said lock
when merely imparting a slight motion to the knob.
In order that the bolt d may safely engage with the protruding edge of the
plate the spring which impels the latch or bolt is mounted in a slanting
direction and thus tends to bring the head of the bolt and hence the groove fover
the projecting edge of the plate g.
The opening formed in the front edge of the lock casing to allow the latch or
bolt to pass leaves a certain amount of play to its head which may thus freely
withdraw its recess from such opening (Figure 6). Just before the door is
thoroughly closed the head of the latch held as shown in Figure 6 meets with the
staple which causes it to leave the projecting edge of the plate and it is then shot
into the staple the full length of its stroke as under ordinary circumstances.
The same arrangements are applicable to locks having a double knob and known
as "Gollot's" locks Figures 7 and 8. The latch however instead of being recessed
is provided with a shoulder f acting in exactly the same manner as the groove of
Figures 4 to 6 by hooking onto the casing of the lock and forming a stop thereon.
In this case as in the preceding instance a small additional spring i may be used
(Figures 8 and 9) to ensure the gearing of the groove or shoulder f. The
application of the above described arrangement allows while dispensing with costly
and inconvenient door closing devices of the strength of the springs generally used
for locks being likewise decreased which facilitates their handling and renders it
safer while making it unnecessary to give a slant form to the heads of latches or
bolts or can be used with same.
It will be obvious that my present improvements may be applied to a great
variety of locks and latches for instance railway carriage doors, ordinary house
doors of various kinds, latches or bolts of French windows or casements etc. etc.
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 :-
-
•
1. In locks or latches of the character in which the bolt or latch is held
back when the door or other device to which same is applied is opened and is
automatically released when the said door etc. is closed-the application and
combination with an ordinary bolt of a lock or latch of a spring hook or arm such
as arranged mounted combined and acting substantially in the manner and for
the purposes hereinbefore described with reference to Figs. 1 to 3 of the drawings
in this case.
2. In locks or latches of the aforesaid character-I claim the arrangement and
combination of the groove or recess such as f in the bolt acting in conjunction
with a fixed projection such as g and a spring or springs arranged combined and
acting substantially in the manner and for the purposes hereinbefore described
with reference to Figs. 4 to 6 of the drawings in this case.
3. In locks or latches of the aforesaid character-I claim the arrangement and
combination of a swelling or projection such as on the bolt of a lock or latch
acting in conjunction with a fixed point or projection such as y and a spring or

page_text: springs to force said bolt against or towards said projection gall arranged
combined and acting substantially in the manner and for the purposes hereinbefore
described with reference to Figs. 7, 8 and 9 in this case.
Dated this 24th day of February 1893.
TONGUE & BIRKBECK,
34, Southampton Buildings, Chancery Lane, London, W.C.,
Agents for the Applicant.