Certain Improvements in Door Locks and Night Latches.
Year: 1893

page_text: Date of Application, 14th June, 1893
Complete Specification Left, 14th Mar., 1894-Accepted, 14th June, 1894
PROVISIONAL SPECIFICATION.
Certain Improvements in Door Locks and Night Latches.
1, GEORGE WORRALL, of 47, Stafford Street, Willenhall, Staffordshire,
Manufacturer of Locks and Latches, do hereby declare the nature of this invention
to be as follows:-
This invention consists of the hereindescribed improved construction and
arrangement of the parts of those door locks and night latches which are constructed
so as to answer for either right or left hand or plain or reverse bevei. By my
invention I obtain a longer shoot of the bolt so as to go farther into the staple or
striking plate and make the door more secure than does an ordinary latch and I
am enabled to draw the bolt back with turning the key through a smaller angle
than is usual and I so arrange the bolt and striking plate that there is very little
friction on the same as the bolt passes the striking plate when closing the door.
I will describe my invention as applied to a night latch. In carrying out this
invention I fit into the reversible latch case a spring bolt made with a rounded end
to act upon the striking plate or staple which latter is made with an extra long
bevel for the bolt to act upon. The bolt is by preference arranged above the key
hole. Within the latch case I provide a lever hereinafter called the bolt lever as
it acts directly upon the bolt. This bolt lever is pivotted to the latch case at one
side of the key hole that is the side farthest from the acting end of the bolt and is
carried round the key hole to the other side thereof and the upper part of the
lever has a projection which acts directly upon the bolt. I provide one or more of
the usual levers in the latch case notched to act upon a projection on the bolt lever
so as to lock the bolt lever in the position which it occupies when the bolt is shot
forward and so as to be moved by turning the key when drawing back the bolt.
When the key is inserted in the key hole and turned through a small angle to
draw back the bolt the key first moves the levers to release the bolt lever and then
acts upon an inclined portion of the bolt lever near the outer end thereof turning
the bolt lever and the bolt backwards the peculiar arrangement of the bolt lever
causing the bolt to move through comparatively a long space when the key is
turned through but a very small angle. Or instead of the bolt lever acting
directly upon the bolt the bolt lever may act upon another lever which I call the
tail piece and which acts upon the bolt and to which tail piece the knob for
drawing back the bolt may be fixed; or the knob may be fixed directly to the
bolt or to what is known as a follow for operating the bolt. To enable the knob
to be reversed from one side of the latch case to the other both sides of the latch
case are slotted and the knob is constructed to screw into the bolt or into the tail
piece or into the follow from either side of the latch case; or the knob may be
fixed to the bolt or to the tail piece or to the follow by means of a separate screw
which can be screwed into the bolt or tail piece or follow so as to project at either
side of the latch case, the knob having a square or other shaped foot which takes
into a hole of corresponding shape in the bolt or tail piece or follow to prevent the
knob from turning round. Or instead of the bolt being provided with a knob
either side of the bolt or of the tail piece may have a hole so that it can be turned
back by the finger as in ordinary latches.
I provide a slide which projects through the side of the latch case and which can
be moved to and fro to stop the bolt in or out of the latch case; or instead of the
said slide there may be a pin to pass through the latch case and engage the bolt as
in ordinary latches.

page_text: My invention is applied to door locks similarly as above described with reference
to night latches except that in door locks the levers are made with notches to
retain the bolt when drawn back as well as when shot forward.
Dated this 12th day of June 1893.
CHARLES BOSWORTH KETLEY,
Agent for the Applicant.
COMPLETE SPECIFICATION.
Certain Improvements in Door Locks and Night Latches.
I, GEORGE WORRALL, late of 47, Stafford Street, Willenhall, Staffordshire,
now of 7, Newcomen Street, Borough London, Manufacturer of Locks and Latches,
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 of the herein-described improved construction and
arrangement of the parts of those door locks and night latches which are con-
structed so as to answer for either right or left hand or plain or reverse bevel.
By my invention I obtain a longer shoot of the bolt so as to go farther into
the staple or striking plate and make the door more secure than does an
ordinary latch and I am enabled. to draw the bolt back with turning the key
through a smaller angle than is usual and I so arrange the bolt and striking
plate that there is very little friction on the same as the bolt passes the striking
plate when closing the door.
I will describe my invention as applied to night latches and I will refer to
the accompanying drawings on which
Fig. 1 shews a night latch constructed according to this invention the front
plate being removed so as to shew the internal mechanism;
Fig. 2 shews the same night latch and the striking plate the bolt and operating
mechanism being shewn as when moved back by the key;
Fig. 3 is a sectional plan of the same and
Fig. 4 shews what I call the bolt lever of the said night latch;
Fig. 5 illustrates a modification of my invention; and Fig. 6 shews in plan the
striking plate and part of the bolt and latch case.
Fig. 7 shews an alternative method of securing the knob to the bolt or tail
piece or follow and
Fig. 8 shews another way of making the bolt this however shewn by Fig. 8
forming no part of this invention;
Fig. 9 illustrates a further modification of my invention.
Referring firstly more particularly to Figs. 1, 2, 3 and 4 in carrying out this
invention I fit into the reversible latch case A a spring bolt B made with a rounded
end to act upon the striking plate C or staple which striking plate or staple is
made with an extra long bevel c' for the bolt B to act upon. The bolt B is by
Within the latch case A
preference arranged above the keyhole d as shewn.
of
provide a lever E hereinafter called the bolt lever as it acts directly upon the
bolt B. This bolt lever is shewn separately by Fig. 4. It is pivotted to the latch
case at e' at that side of the keyhole d which is farthest from the acting end
the bolt and is as shewn carried round the keyhole d to the other side of the same
for the key to act upon it as hereinafter described and the upper part of the bolt
lever E has a projection 2 at the top which acts directly upon a projection 62 on the
bolt B. I provide one or more of the usual levers in the latch case such as F¹ F
notched at to act upon the projection e³ on the bolt lever so as to lock the bolt
lever in the position which it occupies as shewn by Fig. 1 when the bolt B is shot
forward the said levers F1 F2 being also shaped in any well known manner so as
to be moved by turning the key G when drawing back the bolt B.

page_text: When the key G is inserted in the keyhole d as shewn in Fig. 1 and turned
through a small angle to draw back the bolt B as shewn in Fig. 2 the key G first
moves the levers F F to release them from the projection of the bolt lever F
and then the key G acts upon the inclined portion of the bolt lever E near the
outer end thereof so as to turn the bolt lever E and bolt B backwards as shewn in
Fig. 2 the peculiar arrangement of the bolt lever E causing the bolt B to inove
through comparatively a long space when the key G is turned through but a very
small angle.
I provide a slide H which projects through the side of the latch case as shewn
and which can be moved up and down to stop the bolt in or out of the latch case.
The slide H has a notch in its upper side so that when the bolt B is drawn back
as shewn in Fig. 2 the slide H can be moved up for the notch h¹ therein to engage
with the tail end 63 of the bolt and retain the bolt in this position; or when the
bolt is shot forward the slide H can be moved up so that it will form a stop against
the tail end of the bolt B and thus lock the bolt in its forward position shewn by
Fig 1. The spring I acts upon the tail of the bolt B to shoot the bolt forward
and this spring may also as shewn in Figs. 1 and 2 fit between the side a¹ of the
latch case and a pin on the slide H and thus prevent the slide H falling down.
Instead of the slide H there may be a pin to pass through the latch case and
engage in the bolt B as in ordinary latches to stop the bolt in or out of the
latch case.
Instead of the bolt lever E acting directly upon the bolt B as above described
and shewn in Figs. 1, 2 and 3 the bolt lever E may as shewn in Fig. 5 act upon
another lever J which I call the tail piece which is pivotted on the pin e¹ on which
the bolt lever E is pivotted and at its upper end engages in a slot 6 in the bolt B
80 as to act upon the bolt B when the bolt lever E is raised. The knob K for
drawing back the bolt B may as shewn in Fig. 5 be fixed to the boss j¹ of this tail
piece J; or the knob K may as shewn in Fig. 1, 2 and 3 be fixed directly to the
boss of the bolt B or the knob may be fixed to what is well known as a follow
for operating the bolt. The latch case and top plate are slotted to allow of the
knob K moving to and fro.
Or
To enable the knob K to be reversed from one side of the latch case to the other
both sides of the latch case are slotted as stated above and the knob is as shewn in
Fig. 3 constructed with a shank to screw into the bolt B or into the tail piece or
into the follow from either side of the latch case that is to say the knob K can
either be arranged on one side of the latch case as shewn by the full lines in Fig. 3
or on the other side of the latch case as shewn by the dotted lines in Fig. 3.
the knob K may be fixed to the bolt B or to the tail piece J or to the follow by
means of a separate screw as shewn in Fig. 7 which can be screwed into the
bolt B or into the tailpiece J or into the follow from either side and is made long
enough to project beyond the side of the latch case as shewn in Fig. 7 and to screw
into the knob K the said knob having a square or other shaped foot k³ which takes
into a hole of corresponding shape in the bolt B or in the tail piece or follow to
prevent the knob K from turning round. Or instead of the bolt B or the tailpiece J
being provided with a knob for moving the same either side of the bolt B or of the
tailpiece may have the well known recessed hole m such as shewn by Fig. 8 so that
the bolt can be turned back by the finger as in ordinary latches.
In the modification of my invention shewn by Fig. 9 I dispense altogether
with the bolt lever E and in this case the key & acts directly upon the
tailpiece J.
My invention is applied to door locks similarly as above described with reference
to night latches except that in door locks the lever or levers (such as F¹ F³) are
each made with a notch 3 such as shewn by Fig. 10 to engage with the
projection on the bolt lever E so that the said lever or levers will then retain the
bolt B when drawn back as well as when shot forward.
I wish it to be understood that I make no claim to the round end b¹ of the bolt B
nor to the striking plate C as described and shewn as I am aware that these are

page_text: old. The striking plate C shewn on Figure 5 my drawings is not reversible, but
the other striking plate (Fig. 3) will serve for either right or left hand doors.
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 door locks and might latches of the kind herein referred to and in
combination with the spring bolt thereof, the employment of the bolt lever such
as E constructed and arranged and combined with the spring bolt and with a lever
or levers such as F1 F2 substantially as hereinbefore described and shewn by
Figs. 1, 2, 3 and 4 so as to force back the spring bolt by the turning of the key
through a small angle and be locked by the lever or levers when the bolt is shot
forward, as herein before set forth.
2. In door locks and night latches of the kind herein referred to and in
⚫combination with the spring bolt thereof, the employment of the tail piece such
as J and the bolt lever such as E both constructed and arranged and combined
together and with the spring bolt and lever or levers such as F1 F substantially as
herein before described and shewn by Fig. 5 so as to force back the spring bolt by
the turning of the key through a small angle the said bolt lever being locked by the
lever or levers when the bolt is shot forward, as herein before set forth.
3. In night latches of the kind herein referred to and in combination with the
spring bolt thereof the employment of the tail piece such as J constructed and
arranged and combined with the spring bolt in the manner substantially as
herein before described and shewn by Fig. 9 so as to force back the spring bolt
by the turning of the key through a small angle, as herein before set forth.
4. The construction combination and arrangement of parts forming the improved
night latch herein before described and illustrated by Figs. 1 and 2 of the accom-
panying drawings.
5. The construction combination and arrangement of parts forming the improved
night latch herein before described and illustrated by Fig. 5 of the accompanying
drawings.
6. The construction combination and arrangement of parts forming the improved
night latch hereinbefore described and illustrated by Fig. 9 of the accompanying
drawings.
7. In night latches of the kind herein referred to the improved method of
securing the reversible knob to the spring bolt or to the tail piece as hereinbefore
described and shewn by Fig. 7 of the accompanying drawings.
8. In door locks and night latches of the kind herein referred to the employment
of the spring I arranged substantially as described and shewn so as to serve for the
-bolt A and for the locking slide H as herein set forth.
Dated this 13th day of March 1894.
CHARLES BOSWORTH KETLEY,
Agent for the Applicant.