Improvements in Spring Locks.
Year: 1889

page_text: Date of Application. 14th Nov., 1889-Accepted, 26th Apr., 1890
COMPLETE SPECIFICATION.
[Communicated from abroad by CLEMENT FELTON, of No. 164, King Street, West,
in the City of Toronto, in the Province of Ontario, Canada, Locksmith.]
Improvements in Spring Locks.
I, FREDERICK JOHN CHEESBROUGH, of 15, Water Street, Liverpool, in the County
of Lancaster, Patent Agent, 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 object of the invention is to design a simple latch-lock which may be
readily adapted for cupboards, drawers, trunks etcetera, where a quickly operating
head
snap-lock is desirable, and it consists, essentially, of a split pin having a
formed on it and attached to one of the parts to be locked, the head of the said
pin being designed to pass through a hole made in a plate attached to the other
part to be locked, a wedge fixed to a spring plate being designed to snap into
the split of the pin so as to expand the same and prevent it being withdrawn
from the hole until the wedge has been raised out of its split by the action of a
key, substantially as hereinafter more particularly explained.
Figure 1) is a sectional view, showing my lock applied to a box; the lock being in
its open position.
Figure 2) is a similar view, but showing the lock closed.
"
3) is a detail of my improved lock specially adapted for a cupboard in which
levers may be used.
Figure 4) is a front elevation of the same lock closed.
"2
5) is a detail, showing the levers G, and curved lever H.
In the drawings, like letters of reference indicate corresponding parts in the
different figs., but for convenience of description I shall refer first to Figures 1
and 2.
A, is the hasp, hinged to the lid of the box, and having projecting from it the
pin B. This pin, it will be noticed, has a slit or parting a, made in it and has
also a head b, formed on it. This head is substantially the same size as, and is
designed to fit into, a holo d, made in the plate C. D is a spring, secured at one
end to the plate C, and having a wedge-shaped projection E, formed on its other end,
which wedge projection is designed to fit into the contro of the hole d. When
the basp A, is closed so as to force the head of the pin B, into the hole d, the
wedge projection E, enters the slit a and so expands the head as to prevent it
escaping from the hole until the wedge projection, E, is raised out of the slit
of course the pin may be withdrawn without difficulty. The projection E is thus
raised by inserting a key F, shaped so as to pass below the spring D and raise tho said
spring.
a, when
When my improved lock is adapted to be used in connection with levers G, as in an
ordinary lock, I provide, in addition to these ordinary levers, a pivoted curved
lever H, having a tail, located in the pathway of the key, so that when the key
passes below the spring D, it first pushes up the levers G, thus leaving the spring D,
free to be raised by the further action of the key F, at the samo time the lover H,
is pushed below the spring D, by the action of the key on its tail h, thus holding
up the spring D, and the wedge projection E, in such a position that the levers G, are
held back by the head of the spring and offer no impediment to the locking of the
pin B, when the head of the said pin is inserted through the hole d, (see Figs. 3
and 4).
When the head of the pin B, is inserted through the hole d, it first raises the
spring D, thus allowing the lever H, to drop from under the said spring, which
falle facing the waders projection E. into the slit a. in the pin B, at the

page_text: same time the falling of the head of the spring D, allows the ends of the lever G, to
take up a position over the head of the spring D, thus locking the wedge projection E,
in slit a, of pin B; an L-shaped projection formed on plate C, holding down the
lovers Gas shown. (See Fig. 5).
If desired to use the lock as a simple latch without being locked it is merely neces
sary to push the lever H, further under the spring D, when the action of the pin B, is
not sufficient to release it.
When it is desired to arrange it so that it will lock, the lover E, is pushed
back by pressure on the finger I, which projects from it, as indicated, when the
spring D, once more resumes its position ready to receive and lock the pin B.
There are of course various uses for which my improved lock may be adapted, but
it is not necessary to enumerate them in this specification.
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 pin B, having a split a and a head b, in combination with a wedge projection E,
connected to a spring D, and arranged to operate in conjunction with a plate C
having a hole d made in it; substantially as and for the purpose specified.
2) A pin B, having a split a, and a head, b, in combination with a wedge projec-
tion E, connected to a spring D, and arranged to operate in conjunction with a
plate C, having a hole d, made in it, and a curved lever H, having a tail h, and
a finger I, formed on it, substantially as and for the purpose specified.
3) A pin B, having a split a, and a head b, in combination with a wedge pro-
jection E, connected to a spring D, arranged to operate in conjunction with a plate C
having a hole d, made in it, a curved lever H, having a tail h, and a finger I, formed
on it, and levers G, substantially as and for the purpose specified.
Dated this 13th day of November 1889.