Improvements in connection with Locks or Latches for Doors and such like purposes.
Year: 1894

page_text: Date of Application, 29th Jan., 1894
Complete Specification Left, 29th Oct., 1894-Accepted, 1st Dec., 1894
PROVISIONAL SPECIFICATION.
Improvements in connection with Locks or Latches for Doors and
such like purposes.
I, WILLIAM CHARLES DUDLEY SMITH of The Mill Handsworth near
Birmingham in the County of Stafford Gentleman Farmer, do hereby declare the
nature of this invention to be as follows :-
This invention consists of a socket or case of metal attached to the door, and
containing a rectangular latch or bolt bevilled at its front end as in the usual
manner, an angular piece of metal suitably attached to the socket or case supports
the rear end of the latch or bolt and has a slot therein for the free play of the
same, a spiral or other spring governs the latch or bolt being suitably arranged for
that purpose.
When required to fasten back this latch on the inside a knob or catch and
spindle upon the same enables it to be pressed back, the spindle passing over and
behind a shoulder in the socket or case formed by a slot cut out on an inclined
plane (preferably) and also at a right angle thereto; when released from this
position the latch or bolt is shot forward by the action of the spring into a slot or
box cut in or affixed to the door post or jamb. Obviously by not fastening back
the latch it can be used in the ordinary way so that when the door is closed the
bevilled end slips in to the slot or box.
A portion of the underside of the latch or bolt is cut away to form a projection
or shoulder for the key to bear against, in pressing back the same when unlocking
the door from the outside, the key fitting on to a spindle situated just below the
latch and forcing the same upwards and backwards so that the spindle of the knob
is pressed behind the slotted on shoulder upon the socket or case and secured.
The latch or bolt is so fitted in the socket or case that it cannot slip forward beyond
the point where the key presses against the projection or shoulder thereon, nor
can the knob be forced back over the shoulder upon the socket or case by the
slamming or closing of the door, but only by the use of the knob inside or the key
outside as above described.
Dated this 26th day of Ion
1001
EDWARD J. PAYNE & SON,
104, Colmore Row, Birmingham, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in connection with Locks or Latches for Doors and
such like purposes.
I, WILLIAM CHARLES DUDLEY SMITH of The Mill Handsworth near
Birmingham in the County of Stafford Gentleman Farmer, 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, reference
being had to the drawings accompanying this Specification and to the figures and
letters shewn thereon:-
My invention consists of a socket or case of metal which is attached to the door
in any suitable manner, and within which is a rectangular latch or bolt bevilled at
its front end as in the ordinary way, the said latch or bolt has a tail piece or

page_text: spindle in connection with same, the rear end of which passes through and is
supported by an angular piece of metal loosely attached to the socket or case by
means of a screw or other suitable method so that it can turn thereon. A spiral
spring encircles the tail piece or spindle and governs the action of the latch or
bolt, or other arrangement of spring or spring substance may be used.
The outer plate of the lock case is cut out in a particular manner for the spindle
of the knob or catch to pass through in connection with the latch or bolt-namely
I slot out the case somewhat in the form of a heart shape & with an inclined plane
preferably, the slotted out aperture has a shoulder for the spindle of the knob to
pass over and behind when required to fasten the bolt back.
When released from this position the latch or bolt is shot forwards by the action
of the spring into a slot or box cut in or affixed to the door jamb or post.
I will proceed to describe the parts as also the action of my said invention with
the assistance of the drawings in which similar letters of reference indicate similar
parts on the figures.
Figure I is an interior view of the lock constructed so that it shall be adaptable
either as a right or left hand lock, shewn locked.
Figure II is an exterior view of same, shewing slotted aperture and position of
knob.
Figure III. Sheet 2 is an interior view with the latch or bolt pressed back or
unlocked.
Figure IV. is an exterior view, shewing position of knob.
Figure V. an exterior view of the lock case and back plate, shewing the form of
key hole I prefer to adopt.
Figure VI. Sheet I is an interior view of a lock shewing an alternative
arrangement.
A is the socket or case of metal which may be stamped or otherwise formed out
of one piece with the flanges or sides B. for attachment to the door by screws C.
or other means, D. is the rectangular latch or bolt of a circular shape in its centre,
and cut out as shewn at E. F is the tail piece or spindle encircled by the spiral
spring G. H is the movable angular piece of metal having a slot in its perpendicular
front which supports and through which works the tail piece or spindle F. said
angular piece of metal H being attached to the lock case by the screw I. J. Figures II
and IV. is the slotted out aperture in the case and shoulder K. L the knob upon
the spindle attached to the latch or bolt. The action is thus. When locked the
parts will be in position as in Figures I and II. to unlock same by passing the key
onto the spindle M. and turning, the key will bear against the inside of the cut out
centre portion of the bolt at N. thus pressing it back and compressing the spring
which bears against the bolt and the supporting back piece H. which slightly turns
upon its screw I. to freely allow of the backward action, the latch or bolt can then
be fastened back by the knob and spindle which is passed over and behind the
shoulder K. of the slotted aperture J. when the knob and its spindle will take the
position seen in Figure IV. Obviously by not fastening back the latch or bolt it
can be used in the ordinary way so that when the door is closed the bevilled end O.
slips into the slot or box of the door jamb.
As seen in Figure V. I use a double key hole P. so that whichever way the
lock may be attached to the door either to the right, or left, the key hole will be in
position relatively, and as will be readily seen the lock will act either way, the
only difference being that when attached say, to the left of the door, the lower
part of the slotted aperture J. becomes the upper part and the spindle and knob
are pressed upwards behind the shoulder K. when fastening back the latch.
A back plate Q Figure V. may or may not be used to cover in the parts.
Referring to Figure VI. the action is precisely similar to the aforesaid method,
though the construction is somewhat different. A portion of the latch or bolt (a).
is cut away upon its under side to form a projection or shoulder (6) for the key to
bear against in pressing back the same when unlocking the door from the outside,
the key fitting onto the spindle (c) situated just below the latch or bolt, a similar

page_text: slotted out aperture is in the outer plate of the case as described. For this pattern
a back plate will be required for attachment to the door though the case may be
made as previously set forth.
In either of the above named methods, the latch or bolt is so fitted in the socket
or case, that it cannot slip forwards beyond the point where the key presses against
the same, nor can the knob be forced back over the shoulder of the slotted aperture
by the slamming or closing of the door, but only by the use of the knob inside or the
key outside, moreover when the knob is screwed onto its spindle the latch is still
further kept in place and to its work.
By my invention a very simple and effective arrangement is obtained, and one
not liable to get out of order or fail in action.
I do not limit myself to the precise construction as herein set forth as I may
modify or vary the details without departing from the general principle.
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.
I. In the manufacture of locks and latches the particular construction and
arrangement of the several parts comprising my invention all acting in manner
and for the purpose substantially as described and illustrated in the accompanying
drawings.
II. In the manufacture of locks and latches the particular manner of slotting
out the exterior plate of the case for the spindle and knob to work in as described
and illustrated.
III. The general arrangements or other similar acting means whereby the
principle of my said invention may be carried into effect for the purpose herein set
forth and described.
1
L
AD 1004
EDWD. J. PAYNE & SON,
104, Colmore Row, Birmingham, Agents for the Applicant.