Improvements in or relating to Latch and Lock Cases.
Year: 1897

page_text: PROVISIONAL SPECIFICATION.
Improvements in or relating to Latch and Lock Cases.
I, DAVID BEARDS, of 13, Wood Street, Willenhall, in the County of Stafford,
Latch and Lock Manufacturer, do hereby declare the nature of this invention
to be as follows:-
This invention relates to latches and locks which are each required to have a
nozzle projecting at the outer face of the cap plate within which the bit of the
key operates to operate the latch or lock mechanism. These nozzles as here-
tofore employed have been formed, usually in brass, separate from the cap plates
and have been fixed thereto by rivets or screws. This construction, however, is
somewhat expensive, and there is the liability of the nozzles coming loose.
Now, according to this invention, the nozzle is formed in the same piece of
sheet metal with the cap plate by pressing it outwards from the other portion of
the metal in a suitable press provided with suitable tools; and the inner or open
end of the nozzle is closed in or bridged across by means of a plate which is
screwed or riveted against the inner face of the cap plate and forms a stop to the
inner end of the key.
Improvements in or relating to Latch and Lock Cases.
I, DAVID BEARDS, of 13, Wood Street, Willenhall, in the County of Stafford,
Latch and Lock Manufacturer, 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 relates to latches and locks which are cach required to have a
nozzle projecting at the outer face of the cap plate within which the bit of the
key operates to operate the latch or lock mechanism. These nozzles as here-
tofore employed have been formed, usually in brass, separate from the cap plates
and have been fixed thereto by rivets or screws. This construction, however, is
somewhat expensive, and there is the liability of the nozzles coming loose.
Now, according to this invention, the nozzle is formed in the same piece of
sheet metal with the cap plate by pressing it outwards from the other portion of
the metal in a suitable press provided with suitable tools; and the inner or open
end of the nozzle is bridged across by means of a plate which is

page_text: fixed against the inner face of the cap plate and forms a stop to the inner end
of the key.
In order that the invention may be clearly understood, I will proceed to
describe the same with reference to the accompanying drawings, which illustrate
it as applied to an ordinary night latch.
Figure 1 is an inside view of the latch with the cap plate removed. Figure 2
is an inside view of the cap plate. Figure 3 is a section through the latch taken
in the plane indicated by line of Figure 1, and shews also the key in position
for operating the bolt; and Figure 4 is an outside or back view of the cap
plate.
-
A is the cap plate, and B the nozzle which is pressed outwards therefrom by
means of suitable tools. In using ordinary qualities of metal the plate is heated
before being operated upon by the press tools. The inner or open end of the
nozzle is bridged across by means of a plate C which is secured to the inner face
of the cap plate by means of rivets or in any convenient manner, and this
plate acts as a stop to the inner end of the key D, and serves also to carry
wards, or levers, if either of such are employed. A notch is formed in from
the hinder edge of the plate into which enters a projection c of the bolt tail
against which the key bears to draw back the bolt. A key hole is, of course,
formed through the closed end of the nozzle and an escutcheon d is or may be
fixed to the outer face of the nozzle by means of rivets, or in other convenient
manner.
While it is preferred to form the cap plate of sheet metal with a nozzle pressed
out therefrom, the plate and nozzle may be formed in one piece by casting. In
the latter case the bridge-piece to receive the end of the key may be subsequently
fixed to the back of the cap plate, or it may, if desired, be formed in the same
casting therewith.
The use of a bridge piece across the back end of the nozzle enables a much
shorter key to be used than would otherwise be the case.
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:
1. A latch or lock case having a nozzle formed in the same piece of metal
with the cap plate substantially as described.
2. A latch or lock case having a nozzle formed, by suitable press tools, in the
same piece of sheet metal as the cap plate, substantially as described.
3. A latch or lock case having a nozzle formed in the same piece of metal as
the cap-plate and the open end of the nozzle crossed by a plate which receives
the inner end of the key, substantially as described.
Dated this 27th day of May 1898
STEPHEN WATKINS
Wolverhampton, Agent for the Applicant.