Year: 1897

page_text: I, CHARLES JAMES HARCOURT, of the Firm of R. and C. Harcourt and Son
Limited, of Moseley Street, in the City of Birmingham, Manufacturers, do hereby
declare the nature of this invention to be as follows:-
This invention consists of improvements relating to locks and latches for shop
doors and for other purposes my object being to produce the cast bodies or casings
of such locks in a more simple and economical manner.
In the application of my invention to the construction of a cast lock and latch
for a shop door or for a like service, I make the lock and latch body in two parts
in the usual manner, consisting of a box like chamber or receptacle for containing
the lock and latch mechanism, and a back or covor plate connected preferably
by screws to the chamber part. But instead of fixing cores in the mould for
the purpose of forming the side apertures in the box or chamber for the lock and
latch bolts, I provide for the formation of such apertures in the pattern itself,
and dispense entirely with the use of cores in the moulding of the chamber or box
part as also in the cover or back plate.
With such a method of forming the lock and latch bolt apertures, the end of
such apertures adjacent to the back or cover plate is left open, but I arrange for
the closing of the same by forming corresponding projections on the cover plate.
I apply my invention to the construction of locks, latches or combined locks
and latches of varying types adapted to meet the particular services for which they
are required.

page_text: declare the nature of this invention and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement:-
This invention consists of improvements relating to locks and latches for shop
doors and for other purposes my object being to produce the cast bodies or casings
of such locks in a more simple and economical manner.
In the accompanying sheet of explanatory drawings to be hereinafter referred
to:―
Figure 1 is an elevation of the rear or inner end of a lock and latch body made
in accordance with my invention Figure 2 is a similar view of the cover plate.
Figure 3 is a plan of the lock body with the cover plate removed.
Figure 4 is an elevation of the front or outer end of the cover plate: Figure 5
is a similar view of the lock body.
The same reference letters in the different views indicate the same parts.
In the application of my invention to the construction of a cast lock and latch
for a shop door or for a like service, I make the lock and latch body in two parts
in the usual manner, consisting of a box like chamber or receptacle as A for
containing the lock and latch mechanism and a back or cover plate B connected
preferably by screws to the chamber part. But instead of fixing cores in the
mould for the purpose of forming the side apertures a and a¹ in the box or
chamber for the lock and latch bolts respectively, I provide for the formation of
such apertures in the pattern itself, and dispense entirely with the use of cores
in the moulding of the chamber or box part as also in the cover or back plate.
With such a method of forming the lock and Jatch bolt apertures, the end of
cach of such apertures adjacent to the back or cover plate is left open, but I
arrange for the closing of the same by forming corresponding projections on the
cover plate. Thus the projection from the cover plate 13 closes the open end
of the lock bolt aperture a, whilst projections close the double aperture a¹
for the latch bolt.
I apply my invention to the construction of locks, latches or combined locks
and latches, of varying types adapted to meet the particular services for which they
are required.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is:-
The production of the cast bodies or casings of locks, latches, and combined
locks and latches without the use of cores and substantially in the manner
described and as illustrated.
MICH
this 24th day of August 1898.
MARKS & CLERK,
18, Southampton Buildings. London, W.C., and
13. Temple Street, Birmingham, Agents for the Applicant.