Certain Improvements in Door Locks and Latches.
Year: 1894

page_text: Date of Application, 30th Oct., 1894
Complete Specification Left, 30th July, 1895-Accepted, 31st Aug.,
1895
PROVISIONAL SPECIFICATION.
Certain Improvements in Door Locks and Latches.
1, HENRY WYLDE, of Victoria Villa, Furlong Lane, Cradley, Cradley Heath,
Staffordshire, Brickworks Manager, do hereby declare the nature of this invention
to be as follows:-
:-
This invention has reference to door locks and latches and consists in constructing
and arranging the knob spindle or handle spindle and the latch proper as hereinafter
described so that the latch will be operated by a push or pull action ou the said
spindle, instead of turning the same. Thus to open a door fitted with one of my
improved locks or latches it is only necessary to pull or push the knob or handle
in the direction in which the door is required to open which will have the effect of
withdrawing the latch from the catch plate.
In carrying out this invention I provide a lateral inclined projecting piece on
that part of the said knob spindle or handle spindle which is contained within the
lock case or latch case and I make a coresponding side projecting part on the
latch proper which is also by preference inclined so that when the said knob
spindle or handle spindle is pushed or pulled in one direction the inclined part of
the said spindle will act upon the inclined projecting part of the latch and force
the latch back against the action of a spring so that when the spindle is released the
spring will force the latch forward again and bring the spindle back to its normal
position.
In order to diminish the friction between the part on the spindle which acts on
the part of the latch proper I may provide on the latch proper and on the spindle
or on both a friction roller.
Dated this 29th day of October 1894.
CHARLES BOSWORTH KETLEY,
Agent for the Applicant.
COMPLETE SPECIFICATION.
Certain Improvements in Door Locks and Latches.
1, HENRY WYLDE, of Victoria Villa, Furlong Lane, Cradley, Cradley Heath,
Staffordshire, Brickworks Manager, 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 has reference to.door locks and latches of the kind in which the
latch is operated by a push or pull action of the knob or handle so that in order
to open the door the knob has to be pushed or pulled in the direction in which the
door is required to open which has the effect of withdrawing the latch from the
catch plate. This invention consists in constructing and arranging the knob spindle
or handle spindle and the latch proper as hereinafter described whereby the
desired result is obtained with a very simple and inexpensive arrangement of
mechanism.
I will describe my invention by referring to the accompanying drawing on
which
Fig. 1 is a front elevation of a combined lock and latch with the latch and
knob spindle constructed and arranged in accordance with my invention; Fig. 2 i
Pice 8d.

page_text: a sectional plan of the same with the latch protruding and Fig. 3 is a sectional plan
of the same with the latch withdrawn ;
Fig. 4 is a separate view of the knob spindle; and.
Fig. 5 shews a slightly modified arrangement of my invention.
The same letters of reference indicate the saine parts in all the figures.
A is the lock case; B is the door to which the same is fixed; C is the latch
proper made with an inclined fore end c¹ as usual; D is the knob spindle or handle
spindle by which the latch C is withdrawn into the lock case and E is the spring
which moves the latch C forward to its normal position.
In carrying out this invention I provide a lateral inclined projecting piece d' on
that part of the knob spindle D or handle spindle which is contained within the
lock case or latch case A and I make a corresponding inclined part c² on the latch
proper C. The latch spindle D is by preference arranged on about the horizontal
centre line of the latch C so that there will be a direct pressure thereon by the
incline d' of the latch spindle D as hereinafter described and there will be no
tendency to move the latch C out of line. When the knob spindle D or handle
spindle pushed or pulled in the direction indicated by the arrow in Figs. 2 and 3,
the inclined part d' of the spindle D will act upon the inclined part 2 of the
latch C and force the latch back against the action of the spring E to the position
shewn by Fig. 3, and when the spindle D is released the spring E will force the
latch C forward again and bring the spindle back to its normal position shewn
by Fig. 2.
The back part of the bolt C has to be guided so that it will not get out of
place. This can readily be done by the spindle D passing through the slot c* in
the bolt C or by the latch C having a slot at the back which engages with the
parallel strip a fixed to the lock casing and along which the back part of the
fatch C will move.
In order to diminish the friction between the projecting part on the spindle
which acts upon the part of the latch proper I may as shewn in Fig. provide
on the latch proper a roller F arranged for the inclined part d to act upon and to
force the latch C back against the action of the spring E when the knob spindle is
pushed or pulled in the direction indicated by the arrow in Figs. 2 and 3 herein-
before described.
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 !
claim is: :-
1. In a door lock or door latch, the combination of the latch proper such as C
adapted to slide to and fro and made with an inclined part c¹ or roller F, a spring
adapted to force the latch forward, and a knob spindle or handle spindle D made
with a lateral inclined projection d within the lock case or latch case adapted to
act upon the incline c¹ or roller F of the latch so as to force the latch back against
the action of the spring when the spindle D is moved endwise, substantially as
hereinbefore set forth.
2. In a door lock or door latch, the combination of the latch proper such as C
adapted to slide to and fro and made with an inclined part c¹ or roller F, a spring
adapted to force the latch forward, and the knob spindle or handle spindle D
arranged to pass through a slot in the latch proper and made with a lateral inclined
projection within the lock case or latch case adapted to act upon the incline c
or roller F of the latch so as to force the latch back against the action of the
spring when the spindle D is moved end wise, substantially as herein before set forth.
Dated this 27th day of July 1895.
CHARLES BOSWORTH KETLEY,
Agent for the Applicant.