Improvements in Door Latches.
Year: 1890

page_text: Date of Application, 5th Nov., 1890)
Complete Specification Left, 31st July, 1891-Accepted, 5th Sept., 1891
PROVISIONAL SPECIFICATION.
Improvements in Door Latches.
I, JAMES BELL, of 2 Farrar Street, Darlington, in the County of Durham,
Joiner, do hereby declare the nature of this invention to be as follows:-
The invention has for its object the production of a cheap and simple mortice
door latch, which is capable of casy application to a door without cutting so much
of the latter away as when using ordinary mortice latches, thereby avoiding the
unsightly appearance of outside latches and retaining the strength of the door.
For this purpose the latch or bolt proper is enclosed and guided within a case or
chamber attached to the bolt plate, which is formed with an opening through which
the latch or bolt is protruded, and such case or chamber also contains a spring
which acts to protrude the bolt or latch; the bolt or latch is connected by a chain
to a short lever mounted on the lock spindle, which latter is otherwise detached
from the latch or bolt and is passed through a hole bored transversely through the
door the spindle is formed square at its ends and is fixed in any suitable manner
to the knobs or handles.
.
The said spindle is preferably formed square at the centre of the length thereof
to receive the before mentioned short lever, and it is formed cylindrical on each
side of such square part, such cylindrical parts being of larger diameter on one
side of the square and of smaller diameter on the other, in order that the spindle
may be readily passed through the before mentioned short lever and through
cylindrical bushes attached to roses fixed to the door, the bores of such bushes
being of diameters to fit the cylindrical parts of the spindle. If desired the two
cylindrical portions of the spindle may be of equal size but smaller than the
central square part thereof; in this case one or both of the roses will be affixed to
the door after the spindle is in position therein.
Dated this 5th day of November 1890.
JAMES BELL.
By Harris & Mills,
23, Southampton Buildings, London, Agents.
COMPLETE SPECIFICATION.
Improvements in Door Latches.
I, JAMES BELL, of 2 Farrar Street, Darlington, in the County of Durham,
Joiner, 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 :-
The invention has for its object the production of a cheap and simple mortice
door latch, which is capable of easy application to a door without cutting so much
of the latter away as when using ordinary mortice latches, thereby avoiding the
unsightly appearance of outside latches and retaining the strength of the door.
For this purpose the latch or bolt proper is enclosed and guided within a case or
chamber attached to the bolt plate, which is formed with an opening, through which
the latch or bolt is protruded, and such case or chamber also contains a spring
which acts to protrude the bolt or latch; the bolt or latch is connected by a chain
or wire to a short lever mounted on the lock spindle, which latter is otherwise
detached from the latch or bolt and is passed through a hole bored transversely
through the door; the spindle is formed square at its ends and is fixed in any
suitable manner to the knobs or handles.

page_text: MOLD Fy to dresCTIVE the same.
DESCRIPTION OF THE DRAWINGS.
Figure 1 is a vertical section and Figure 2 is a horizontal section of part of a
door showing my improved latch in position therein, and Figure 3 is a similar
section to Figure 1, but showing my improved latch combined with a lock.
In all the figures like parts are indicated by similar letters of reference.
it is the latch or bolt, which is enclosed within a case or chamber b. attached to
the bolt plate b, which is formed with an opening, through which the latch or
bolt is protruded, d is a coiled spring within the case, which spring acts against
the rear end of the bolt or latch a to protrude the same. The bolt or 'latch a is
connected by a chain or wire e to a short lever mounted on the lock spindle 'g,
which latter is otherwise detached from the latch or bolt a and is passed through a
hole bored transversely through the door; the spindle is formed square at its'ends"
and is fixed in any suitable manner to the knobs or handles h.
The spindle is preferably formed square at the central part ¹ to receive the
short lever, and it is formed cylindrical on each side of such square part, one of
sich cylindrical parts 92 being of larger and the other g of smaller diameter, in
order that the spindle g may be readily passed through cylindrical bushes, which,
when the roses are formed of metal, may form part of such roses, but when the
latter are formed of china or other non-metallic material, the bushes i are attached
to the door as shown in Figure 2.
1.17
The bores of the bushes' are of diameters to fit the cylindrical parts g³, g³, of
the spindle. If desired the cylindrical parts g², g³, of the spindle may be of equal
size but smaller than the square part g in this latter case one or both of the
roses will be affixed to the door after the spindle g' is in position therein.
In fixing my improved latch to a door, a liolé k is bored' horizontally from the
edge of the door within the thickness thereof to permit of the passage of the
chain or wire e, and at the inner end of such hole k, a transvérsé hole is bored for
the passage of the spindle, the loop lever fattached. 'to the end of the chain or
wire e is pushed down the hole k till it comes into the hole ; when the spindle' is
passed through the square hole in the short lever f, A slotted hole is made in
the spindle g and a circular hole is formed in the neck of one of the roses j, so 'that
by placing a pin me through such holes, the latch can be secured against opening
from the outside of the door. The pin m is secured to the door by a chain m" and
a screw eye m².
By the above described construction of latch the lock spindle g with its handles
can be arranged at any suitable distance from the edge of the door.
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. A door latch constructed substantially as herein, shown and described.
2. A door latch in which the spindle is attached to the latch or bolt. hv

page_text: means of a short lever on such spindle and a chain or wire connecting such short
lever to the latch or bolt, substantially as herein shown and described and for the
purpose stated.
Dated this 21st day of Tuly 1801
JAMES BELL.
By Harris & Mills,
23, Southampton Buildings, London, W.C., Agents.