Year: 1888

page_text: I, CHARLES YOUNG, of 2, Cromwell Villas, Granville Road, Tunbridge Wells, in
the County of Kent, Carpenter, do hereby declare the nature of this Invention, to be
as follows
bears
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According to this invention I provide a convenient and frictionless means for
actuating the latch bolt of a mortice latch of ordinary or other form For this
purpose I provide the latch bolt at the back end with a roller against which the spring
In the mortice of the latch bolt I fit a pin which by preference carries a
roller Against this pin or against the roller thereon bears a double armed lever
which terminates in a knob or handle of any suitable form This handle stands out
on the inside of the door On the other or outer side of the door I provide isımılır
handle and lever which is provided with a roller at its end that bears against a
tumbler or double-armed lever the other end of which beans against the aforesaid
roller in the mortice of the latch bolt To open the door from the inside the handle
is pulled in the direction away from the door, and to open the door from the outside
the handle is pushed against the door The latch spring holds the handles in the
normal position against stops on the handles coming agunst the escutcheons
on each side of the door Sometimes I apply the so-called grip handles to such
latches
This invention is applicable to doors for dwelling houses, coach houses and stables,
banks, public buildings, shops, safes, cupboards, wardrobes, book-cases, and for case-
ment windows, and for many other purposes, and of course either with handle on one
side or on both sides of the door
'

page_text: 331
I, CHARLES YOUNG of 2 Cromwell Villas Granville Road, Tunbridge Wells in the
County of Kent, Carpenter 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
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According to this invention I provide a convenient and frictionless means for
actuating the latch bolt of a mortice latch of ordinary or other form
And in order that my invention may be more easily understood I will describe the
same with reference to the accompanying drawings of which Figure 1 represents a
latch in horizontal section as fixed to a door Figure 2 is sectional elevation of same
removed from the door Figure 3 is a corresponding view showing the catch plate
and Figure 4 represents a latch with one handle only as applied to a casement window
or the like
1 provide the latch bolt A at the back end with a roller B against which a spring с
bears This spring C may be of any suitable construction but for the sake of simplicity
I prefer to make it of the form shown in the drawings If the spring C be made
of a helical or analogous form the roller B will not be required For the purpose of
avoiding fiction on the catch plate A¹ 1 may provide the latch bolt A with a
roller A as shown or in lieu thereof a rounded part This catch plate A¹ is made
in the form shown in Figures 1 and 3 and by its partly circular or sloping face
greatly diminishes the friction when closing the door In a mortice of the latch
bolt AI fit a pin D which by preference carries a roller E, or instead of one roller E
I may use two, both being mounted on the same spindle D Against this pin D, or,
as shown against the roller E thereon or one of them if there are two, bears one
end F of a double armed lever the other end F¹ of which terminates in a knob or
handle of any suitable form
This handle F stands out on the inside of the door X On the other or outer
side of the door I provide a similar handle G and lever G₁ which is provided with
a roller g at its end that bears against a double armed lever H H¹ the end H of which
bears against the aforesaid roller E in the mortice of the latch bolt A
Although I have only shown the roller g as applied to the lever G¹ it is evident
that it might be mounted equally well in the arm H' of the lever H H¹ To open
the door from the inside the handle F is pulled in the direction away from the door
and to open the door from the outside the handle G is pushed against the door The
latch spring C holds the handle levers F¹ G¹ in the normal position by means of
stops F G which come against the handle plates or escutcheons 1 K on each side of
the door I prefer to apply the so called grip handles as shown on the drawings but
it is evident that any other suitable knobs or handles may be applied
In order to lock the latch bolt A in its out position I may provide any suitable
kind of locking device to be actuated by a key or otherwise One suitable mode of
performing this operation is shown at Figure 2 in which a locking bolt 6 1s moved

page_text: out by means of a key inserted in the key hole C and kept against the projecting
part a of the latch bolt A by means of the catch 6' which is normally kept up
against the stop 6' on the bolt 6 In the drawing the bolt 6 is shown in its locked
position
•
This invention is applicable to doors for dwelling houses, coach houses, and stables,
banks public buildings, shops, safes, cupboards wardrobes, bookcases, casement
windows, and for many other purposes When required the handle may be on one
side of the door only as shown in Figure 4 with this exception, this constriction is
substantially the same as that described with reference to Figures 1 and 2 and the
same letters of reference refer to like parts A great advantage is obtained by
the special construction of the handle lever F F and double armed lever H H' inas-
much as these mortice latches may be applied to doors of any thickness without
necessitating the displacing of the handle levers from their proper position because
the parts F and Hare parallel to each other and also being parallel do not require
the hole through the door to be made very large
Having now particularly described and ascertained the nature of my said Inven-
tion and in what manner the same is to be performed 1 declare that what I
claim 1s
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First A mortice latch in which slides a litch bolt A with a roller A' and provided
with a spring and a roller E, said latch bolt being actuated by a double armed handle
lever F F and a lever H H¹ acted upon by another double armed handle lever G³ G'
having a roller g substantially as described and shown
Second In a lock constructed substantially as described the application of the
roller g substantially as and for the purposes set forth
Third In a latch lock as herein described the application of a latch bolt with
rollers A' E and B and partly curved catch plate A¹ for diminishing friction in all
working parts substantially as described and shown
Fourth A mortice latch in which slides a latch bolt A normally kept out by
means of a spring and provided with a roller E against which bears a lever
handle F F substantially as described and shown with reference to Figure 4
Dated the 9th day of March 1889