Year: 1882

page_text: I EDWIN ROBERT WETHERED of Woolwich in the County of Kent seck leave
to amend the specification of Letters Patent, No. 482 of 1882, as shown in red ink
in the copy of the original specification hereunto annexed and marked with the
letter A.
My reasons for making this Amendment aro as follows:-That recently there
has been brought to my knowledge a Specification No. 11523 in the year 1847
describing a latch or lock which although on the whole very different has a feature
in common with the latch or lock which I have patented. Before filing my Final
Specification I read carefully the Volume of Abridginents relating to locks and
latches but the Abridgment failing to notice the feature of similarity, and such
locks or latches not being in use, I remained for a long time ignorant of the prior
Patent.
I desire therefore to disclaim, correct and explain.
Re Edwin Robert Wethered's Application for leave to amend the Specification of
Letters Patent No. 482 of 1882.
I hereby grant leave to the said Edwin Robert Wethered to amend the Specifi-
cation (and the drawings forming part thereof) filed in pursuance of the said
Letters Patent as shewn in red ink in the (Queen's Printers) copy of the original
5 Specification hereunto annexed marked “A " and initialled by me.
H. READER LACK,
Comptroller General,

page_text: PROVISIONAL SPECIFICATION left by the said Edwin Robert Wethered
at the Office of the Commissioners of Patents on the 31st January 1882.
EDWIN ROBERT WETHERED of Woolwich in the County of Kent
MENTS IN LATCHES AND LOCKS "
.
This Invention has for its object improvements in latches and locks.
"IMPROVE-
My improved latch or lock consists of a sliding bolt operated by levers with
handles upon them which by their weight tend to throw the bolt forward.
A socket is provided on the door post to receive the end of the bolt.
On lifting either of the-handles the latch bolt is drawn back-within the lock
case.
The bolt near its outer end rests upon a stud or support fixed in the lock case
and the bolt also has a notch in its under side near the outer end. When the bolt
is drawn back the notch passes the stud or support in the lock case and the bolt
then drops a short distance. This brings the bolt into such a position that the
weight handles cannot throw it forward_until_its.outer_end_has_first_been lifted
again clear of the stud or support.
As the door is shut the lifting of the fore end of the bolt is effected by an incline
upon the striking plate fixed to the door post and the bolt is then at once moved
forward by the weight of the handles. Its end then enters the socket on the door
post.
I provide a handle on the outer as well as the inner side of the door or if
preferred there may be but one handle. The handle levers are carried upon a
spindle which passes through the door, through the lock case and through a slotted
hole in the bolt.
The spindle also has an arm standing up from it and a stud at the end of the
arm passes through a slotted hole in the bolt and is fixed beyond into one of the
handle levers.
In order to prevent the door being opened except by a key, lock mechanism of
any ordinary construction can be provided to shoot a bolt into a recess in the latch
bolt. A thumb bolt may also be provided on the inner side to be used whenever
needful to prevent the door being opened from without or vice versa.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent' filed
by the said Edwin Robert Wethered in the Great Seal Patent Office on the
31st July 1882.
EDWIN ROBERT WETHERED of Woolwich in the County of Kent "IMPROVE-
MENTS IN LATCHES AND LOCKS
"
This Invention has for its object improvements in latches and locks.
My improved latch or lock consists of a sliding bolt operated by levers with
handles upon them which by their weight tend to throw the bolt forward. A
socket is provided on the door post to receive the end of the bolt.
On lifting either of the handles the latch bolt is drawn back within the lock
case. The bolt near its outer end rests upon a stud or support fixed in the lock
caso and the bolt also has a notch in its under sido near the outer end. When the
bolt is drawn back the notch passes the stud or support in the lock case and the
bolt then drops a short distance. This brings the bolt into such a position that
the weight handles cannot throw it forward until its outer end has first been lifted
again clear of the stud or support.
As tho door is shut the lifting of the fore end of the bolt is effected by an
incline upon the striking plate fixed to the door post and the bolt is then at once
moved forward by the weight of the handles. Its end then enters the socket on
the door post.
In order that my said Invention may be most fully understood and readily
carried into effect I will proceed to describe the Drawings hereunto annexed.
DESCRIPTION OF THE DRAWINGS
Figure 1 is a front elevation of a latch lock constructed in accordance with my
Invention. This Figure shows the parts in the positions which they will occupy
when the door to which the lock is affixed is open.
Figure 2 is also a front elevation of the lock, the parts being in the positions
they occupy when the door is closed.
Figure 3 is an horizontal section on the line 1. 1. in Figuro 1.
Figure 4 is a vertical section on the line 2. 2. in Figure 3.
Figure 5 is a side view and Figure 6 is an odge view of the striking plate of the
lock; dotted lines in Figure 5 indicate the position of the bolt at the time when in
closing the door the bolt first comes into contact with the striking plate; other
dotted lines in the same Figure shew the position of the bolt when shot home.
a is the bolt, b is the spindle, and c, is a lever handle upon the spindle which
operates as a weight to shoot the bolt. The spindle may be provided with
two of these lever handles c, or the handle on the outer side may be a simple
knob.
The bolt has a slot in it at a', for the spindle b, to pass through, it has also
another slot a², communicating with the first, to receive a stud c*, which projects
into the lock through a slot in the lock case. The stud c*, is fixed into an arın c¹,
which in this case forms part of the lever handle. ³, is the notch upon the under
side of the bolt which when the bolt is drawn back engages with the stud or
stop & in the lock case. a is a lug upon the lever handle a, which by engaging
with a Bange upon the lock caso relieves the spindle from strain when the door is

page_text: opened by the handle.
c is a set screw which when screwed in enters a corre-
sponding recess in the bolt, it then prevents the door being opened from the outside.
fis the hole in the striking plate which receives the end of the bolt when the door
is closed, and g. is the incline against which the end of the bolt first strikes as the
door is closed. As already explained, by this incline the end of the bolt is raised
sufficiently to clear the notch a³, from the stud or stop d, and then the weighted
lever handle throws the bolt forward.
Figure 7 is a front elevation of another latch-lock in some respects similar to
that already described but in which weighted lever handles are not employed to
shoot the bolt, this office being performed by a spring. Figure S is a plans
Figure 9 is--a vertical section on the line 3.-3 in Figure-8. Figures 10 shew
details-of the-locking contrivance which I adapt to this lateh-lock.
a-is the bolt, it hardly differs from that of the lutch lock previously described,
except that it has an opening in it a³, to receive a turn button upon which a
key-operates.
b-is-the-spindley-it has upon-it-an-arm-b'-corresponding to-the-parts-c's-and-c+r-in
the lock-previously described. The handles upon the spindle-b-are not shewn, they
may be of any convenient description. 7 is the spring by which the bolt-a-is
urged forward. This spring is compressed when the bolt is withdrawn by turning
the handle, it may be remarked that in this lock the engagement of the notch-a³,
with the stud-or-stop-d, does not depend-simply upon the weight of the bolt enusing
it-to-drops-but-this-action-is-aided by the spring which presses upon the bolt at a
point above that against which-the-end-of-the-arm-by-operates. It-is-consequently
possible to employ this latch lock-in-an-inverted position. The locking contrivance
consists of the turn button f-mounted upon a stud on the lock plate from which
also the slender key pin-1-projects. -.-.-are-two-projections at the end of the
barrel of the key-to-enter-corresponding recesses f'.-f'.-in the turn button f. The
turn button has two positions of rest which are diametrically opposite to each
other, in-one of these positions it prevents the withdrawal of the bolt and in the
other it lies upon a stop k in the lock plate in a position which leaves the bolt
free to move. The barrel of the key has two-wings 2.-2. upon it and the key hole
lias-a-corresponding form. Hence the key can only be inserted in such a position
that the projections i, 1. will enter the recesses--fl-in-whichever of its twe
positions the turn-button f may happen to be. There are notches-¿¹×, in the wings
upon the barrel of the key and there are corresponding wards or stops in--the
passage through which the key is inserted. These allow of the key-when-in-its
place being-turned half-round which will carry the turn button from the position
in-which it impedes the movement of the bolt as to the position in which the turn
button leaves the bolt-free or vice versa.-Any false key-having the notches-ix,
misplaced-of-course could not be turned if inserted into the key hole and the true
key is limited in its movement to one half turn by the extension given to the
wards-of-stops-in-the-key-passage.
I desire to refer to the Specification of a Patent granted to John Chubb and
Ebenezer Hunter and dated the 11" day of January 1847 N° 11523.
This Specification describes latches and locks which have a feature of similarity
to that which I have described above especially in respect to the method of retaining
the bolt by a notch and stud but in Chubb and Hunter's latch or lock the bolt is
liberated by means of a nose provided upon the end of the bolt and this nose
always projects from the door. The nose of the bolt as the door is closed enters
the socket into which the bolt shoots by a notch or slit formed in the side of the
socket specially to admit the nose of the bolt laterally.
I make no claim embracing a hitch or lock of this construction in my latches
and locks the bolt has no such nose and the socket no such lateral opening; on the
contrary the bolt is liberated by an incline projecting into the door way towards
the door and which is received into a corresponding recess in the lock, this is an
essential feature in my invention and I disclaim all latches and locks in which
this feature is absent.

page_text: Having thus described the nature of my said Invention and the manner of
performing the same I would have it understood that I claim :—
First. My improvements in latch locks consisting in the application of a
weighted lever handle c to project the bolt a. forward, substantially as described,―
but subject to the Disclaimer expressed above.
Second. My improvements in latch locks consisting in retaining the bolt a, when
withdrawn, by means of the notch a³ and the stud or stop d, substantially as
described, but subject to the Disclaimer expressed above.
Third. My improved latch locks, substantially as herein described and
represented by the annexed Drawings, but subject to the Disclaimer expressed
above.
In witness whereof I the said Edwin Robert Wethered have hereunto set my
hand and seal this Twenty ninth day of July in the year of our Lord One
thousand eight hundred and eighty two.

page_text: PROVISIONAL SPECIFICATION left by the said Edwin Robert Wethered
at the Office of the Commissioners of Patents on the 31st January 1882.
EDWIN ROBERT WETHERED of Woolwich in the County of Kent
MENTS IN LATCHES AND LOCKS'
"
This Invention has for its object improvements in latches and locks.
"IMPROVE-
My improved latch or lock consists of a sliding bolt operated by levers with
handles upon them which by their weight tend to throw the bolt forward.
A socket is provided on the door post to receive the end of the bolt.
On lifting either of the handles the latch bolt is drawn back within the lock
case.
The bolt near its outer end rests upon a stud or support fixed in the lock case
and the bolt also has a notch in its under side near the outer end. When the bolt
is drawn back the notch passes the stud or support in the lock case and the bolt
then drops a short distance. This brings the bolt into such a position that the
weight handles, cannot throw it forward until its outer end has first been lifted
again clear of the stud or support.
As the door is shut the lifting of the fore end of the bolt is effected by an incline
upon the striking plate fixed to the door post and the bolt is then at once moved
forward by the weight of the handles. Its end then enters the socket on the door
post.
I provide a handle on the outer as well as the inner side of the door or if
preferred there may be but one handle. The handle levers are carried upon a
spindle which passes through the door, through the lock case and through a slotted
hole in the bolt.
The spindle also has an arm standing up from it and a stud at the end of the
arm passes through a slotted hole in the bolt and is fixed beyond into one of the
handle levers.
In order to prevent the door being opened except by a key, lock mechanism of
any ordinary construction can be provided to shoot a bolt into a recess in the latch
bolt. A thumb bolt may also be provided on the inner side to be used whenever
needful to prevent the door being opened from without or vice versa.

page_text: sufficiently to clear the notch a³, from the stud or stop d, and then the weighted
lever handle throws the bolt forward.
Figure 7 is a front elevation of another latch lock in some respects similar to
that already described but in which weighted lever handles are not employed to
shoot the bolt, this office being performed by a spring. Figure 8 is a plan,
Figure 9 is a vertical section on the line 3, 3, in Figure 8. Figures 10 shew
details of the locking contrivance which I adapt to this latch lock.
a is the bolt, it hardly differs from that of the latch lock previously described,
except that it has an opening in it at, to receive a turn button f upon which a
key operates.
in
b is the spindle, it has upon it an arm b' corresponding to the parts c¹, and c*,
the lock previously described. The handles upon the spindle 6 are not shewn, they
may be of any convenient description. is the spring by which the bolt a is
urged forward. This spring is compressed when the bolt is withdrawn by turning
the handle, it may be remarked that in this lock the engagement of the notch a³,
with the stud or stop d, does not depend simply upon the weight of the bolt causing
it to drop, but this action is aided by the spring which presses upon the bolt at a
point above that against which the end of the arm b', operates. It is consequently
possible to employ this latch lock in an inverted position. The locking contrivanco
consists of the turn button f mounted upon a stud on the lock plate from which
also the slender key pin h projects. i, i, are two projections at the end of the
barrel of the key to enter corresponding recesses f',f, in the turn button f. The
turn button fhas two positions of rest which are diametrically opposito to cach
other, in one of these positions it prevents the withdrawal of the bolt and in the
other it lies upon a stop k in the lock plate in a position which leaves the bolt
free to move. The barrel of the key has two wings i, i, upon it and the key hole
has a corresponding form. Hence the key can only be inserted in such a position
that the projections i, i, will enter the recesses, ¹, in whichever of its two
positions the turn button f may happen to be. There are notches i¹×, in the wings
upon the barrel of the key and there are corresponding wards or stops in the
passage through which the key is inserted. These allow of the key when in its
place being turned half round which will carry the turn button from the position
in which it impedes the movement of the bolt a, to the position in which the turn
button leaves the bolt free or vice versa. Any false key having the notches i¹*,
misplaced of course could not be turned if inserted into the key hole and the true
key is limited in its movement to one half turn, by the extension given to the
wards or stops in the key passage.
Having thus described the nature of my said Invention and the manner of
performing the same I would have it understood that I claim :-
First. My improvements in latch locks consisting in the application of a
weighted lever handle c to project the bolt a, forward, substantially as described.
Second. My improvements in latch locks consisting in retaining the bolt α, when
withdrawn, by means of the notch a³ and the stud or stop d, substantially as
described.
Third. My improved latch locks, substantially as herein described and
represented by the annexed Drawings.
In witness whereof I the said Edwin Robert Wethered have hereunto set my
hand and seal this Twenty ninth day of July in the year of our Lord One
thousand eight hundred and eighty two.